/* Global Styles */
:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --light-color: #f5f5f5;
    --dark-color: #333;
    --gray-color: #7f8c8d;
    --border-color: #ddd;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--light-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-color);
}

ul {
    list-style: none;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
}

.primary-btn:hover {
    background-color: #2980b9;
    color: white;
}

.secondary-btn {
    background-color: var(--secondary-color);
    color: white;
}

.secondary-btn:hover {
    background-color: #1a2530;
    color: white;
}

/* CTA Section - How to Play 頁面按鈕區塊 */
.cta-section {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 2rem;
    text-align: center;
}

.cta-section .btn {
    min-width: 180px;
}

@media (max-width: 480px) {
    .cta-section {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .cta-section .btn {
        width: 100%;
        max-width: 280px;
        margin: 0 auto;
    }
}

.hidden {
    display: none !important;
}

/* Header Styles */
header {
    background-color: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

nav ul {
    display: flex;
    align-items: center;
}

nav ul li {
    margin-left: 20px;
    display: flex;
    align-items: center;
}

nav ul li a {
    color: var(--dark-color);
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    line-height: 1.6;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--primary-color);
}

/* Nav Dropdown Styles */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-trigger {
    cursor: pointer;
    display: flex;
    align-items: center;
    color: var(--dark-color);
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
    background: none;
    border: none;
    font-size: 1rem;
    font-family: inherit;
    line-height: 1.6;
}

.nav-dropdown-trigger:hover,
.nav-dropdown-trigger.active {
    color: var(--primary-color);
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(5px);
    min-width: 180px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.08);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 1000;
    overflow: hidden;
}

.nav-dropdown.active .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-item {
    display: block;
    padding: 12px 16px;
    text-decoration: none;
    color: #2c3e50;
    transition: all 0.15s ease;
    border-bottom: 1px solid #f1f3f5;
}

.nav-dropdown-item:last-child {
    border-bottom: none;
}

.nav-dropdown-item:hover {
    background: #f8f9fa;
    color: var(--primary-color);
}

.nav-dropdown-item .item-title {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 2px;
}

.nav-dropdown-item .item-desc {
    display: block;
    font-size: 0.75rem;
    color: #7f8c8d;
}

.nav-dropdown-item:hover .item-desc {
    color: #95a5a6;
}

/* Mobile nav dropdown styles */
@media (max-width: 768px) {
    .nav-dropdown {
        display: block;
        width: 100%;
        position: static;
    }
    
    .nav-dropdown-menu {
        position: static;
        transform: none;
        box-shadow: none;
        border-radius: 0;
        background: #f8f9fa;
        max-height: 0;
        overflow: hidden;
        opacity: 1;
        visibility: visible;
        transition: max-height 0.3s ease;
        width: 100%;
        left: 0;
    }
    
    .nav-dropdown.active .nav-dropdown-menu {
        max-height: 200px;
        transform: none;
    }
    
    .nav-dropdown-item {
        display: block;
        padding: 10px 20px;
        border-bottom: 1px solid #e9ecef;
        text-align: left;
        width: 100%;
    }
    
    .nav-dropdown-item .item-title,
    .nav-dropdown-item .item-desc {
        text-align: left;
    }
    
    .nav-dropdown-trigger {
        display: block;
        padding: 13px 10px;
        width: 100%;
        text-align: left;
        border-bottom: 1px solid var(--border-color);
        line-height: normal;
    }
}

.auth-buttons {
    display: flex;
    gap: 10px;
}

.auth-buttons button {
    padding: 8px 15px;
    border-radius: 4px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

/* 🎯 智慧響應式登入/註冊按鈕 - 支援多語言長文字 */
.login-btn, .signup-btn {
    /* 基礎樣式 */
    padding: clamp(8px, 2vw, 12px) clamp(12px, 3vw, 20px);
    font-size: clamp(13px, 2.5vw, 16px);
    font-weight: 600;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid var(--primary-color);
    
    /* 防止斷行和確保單行顯示 */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0; /* 允許彈性縮小 */
    flex-shrink: 1; /* 允許在父容器中縮小 */
    
    /* 確保最小可讀性 */
    min-width: clamp(60px, 15vw, 80px);
    max-width: clamp(120px, 25vw, 150px);
}

.login-btn {
    background-color: transparent;
    color: var(--primary-color);
}

.login-btn:hover {
    background-color: var(--primary-color);
    color: white;
}

.signup-btn {
    background-color: var(--primary-color);
    color: white;
}

.signup-btn:hover {
    background-color: #2980b9;
}

/* 🌍 語言特定的按鈕優化 */
/* 為越南文和其他長文字語言提供額外空間 */
[lang="vi"] .login-btn,
[lang="vi"] .signup-btn,
body[data-lang="vi"] .login-btn,
body[data-lang="vi"] .signup-btn {
    font-size: clamp(11px, 2.2vw, 14px); /* 稍微縮小字體 */
    padding: clamp(7px, 1.8vw, 10px) clamp(10px, 2.5vw, 16px); /* 稍微縮小內距 */
    max-width: clamp(100px, 22vw, 140px); /* 稍微縮小最大寬度 */
}

/* 🔄 確保 auth-buttons 容器也支援彈性佈局 */
.auth-buttons {
    display: flex;
    gap: clamp(8px, 2vw, 12px);
    align-items: center;
    flex-wrap: nowrap; /* 確保不換行 */
}

/* 📱 極小螢幕的額外保護 (320px 以下) */
@media (max-width: 320px) {
    .login-btn, .signup-btn {
        font-size: 11px !important;
        padding: 6px 8px !important;
        min-width: 50px !important;
        max-width: 70px !important;
    }
    
    [lang="vi"] .login-btn,
    [lang="vi"] .signup-btn,
    body[data-lang="vi"] .login-btn,
    body[data-lang="vi"] .signup-btn {
        font-size: 10px !important;
        padding: 5px 6px !important;
        max-width: 65px !important;
    }
    
    [lang="de"] .login-btn, [lang="de"] .signup-btn,
    [lang="es"] .login-btn, [lang="es"] .signup-btn,
    [lang="fr"] .login-btn, [lang="fr"] .signup-btn,
    [lang="it"] .login-btn, [lang="it"] .signup-btn,
    [lang="ru"] .login-btn, [lang="ru"] .signup-btn,
    [lang="th"] .login-btn, [lang="th"] .signup-btn,
    [lang="pl"] .login-btn, [lang="pl"] .signup-btn,
    [lang="cs"] .login-btn, [lang="cs"] .signup-btn,
    [lang="hu"] .login-btn, [lang="hu"] .signup-btn,
    [lang="et"] .login-btn, [lang="et"] .signup-btn,
    body[data-lang="de"] .login-btn, body[data-lang="de"] .signup-btn,
    body[data-lang="es"] .login-btn, body[data-lang="es"] .signup-btn,
    body[data-lang="fr"] .login-btn, body[data-lang="fr"] .signup-btn,
    body[data-lang="it"] .login-btn, body[data-lang="it"] .signup-btn,
    body[data-lang="ru"] .login-btn, body[data-lang="ru"] .signup-btn,
    body[data-lang="th"] .login-btn, body[data-lang="th"] .signup-btn,
    body[data-lang="pl"] .login-btn, body[data-lang="pl"] .signup-btn,
    body[data-lang="cs"] .login-btn, body[data-lang="cs"] .signup-btn,
    body[data-lang="hu"] .login-btn, body[data-lang="hu"] .signup-btn,
    body[data-lang="et"] .login-btn, body[data-lang="et"] .signup-btn {
        font-size: 10px !important;
        padding: 5px 6px !important;
        max-width: 65px !important;
    }
    
    .auth-buttons {
        gap: 6px;
    }
}

/* 📱 小手機螢幕優化 (321px - 480px) */
@media (max-width: 480px) {
    .login-btn, .signup-btn {
        font-size: clamp(12px, 3vw, 14px);
        padding: clamp(6px, 2vw, 10px) clamp(8px, 2.5vw, 14px);
    }
    
    [lang="vi"] .login-btn,
    [lang="vi"] .signup-btn,
    body[data-lang="vi"] .login-btn,
    body[data-lang="vi"] .signup-btn {
        font-size: clamp(11px, 2.8vw, 13px);
        padding: clamp(5px, 1.8vw, 9px) clamp(7px, 2.2vw, 12px);
    }
    
    [lang="de"] .login-btn, [lang="de"] .signup-btn,
    [lang="es"] .login-btn, [lang="es"] .signup-btn,
    [lang="fr"] .login-btn, [lang="fr"] .signup-btn,
    [lang="it"] .login-btn, [lang="it"] .signup-btn,
    [lang="ru"] .login-btn, [lang="ru"] .signup-btn,
    [lang="th"] .login-btn, [lang="th"] .signup-btn,
    [lang="pl"] .login-btn, [lang="pl"] .signup-btn,
    [lang="cs"] .login-btn, [lang="cs"] .signup-btn,
    [lang="hu"] .login-btn, [lang="hu"] .signup-btn,
    [lang="et"] .login-btn, [lang="et"] .signup-btn,
    body[data-lang="de"] .login-btn, body[data-lang="de"] .signup-btn,
    body[data-lang="es"] .login-btn, body[data-lang="es"] .signup-btn,
    body[data-lang="fr"] .login-btn, body[data-lang="fr"] .signup-btn,
    body[data-lang="it"] .login-btn, body[data-lang="it"] .signup-btn,
    body[data-lang="ru"] .login-btn, body[data-lang="ru"] .signup-btn,
    body[data-lang="th"] .login-btn, body[data-lang="th"] .signup-btn,
    body[data-lang="pl"] .login-btn, body[data-lang="pl"] .signup-btn,
    body[data-lang="cs"] .login-btn, body[data-lang="cs"] .signup-btn,
    body[data-lang="hu"] .login-btn, body[data-lang="hu"] .signup-btn,
    body[data-lang="et"] .login-btn, body[data-lang="et"] .signup-btn {
        font-size: clamp(11px, 2.8vw, 13px);
        padding: clamp(5px, 1.8vw, 9px) clamp(7px, 2.2vw, 12px);
    }
}

/* 🌐 德文、西班牙文、法文、義大利文等長文字語言按鈕優化 */
[lang="de"] .login-btn, [lang="de"] .signup-btn,
[lang="es"] .login-btn, [lang="es"] .signup-btn,
[lang="fr"] .login-btn, [lang="fr"] .signup-btn,
[lang="it"] .login-btn, [lang="it"] .signup-btn,
body[data-lang="de"] .login-btn, body[data-lang="de"] .signup-btn,
body[data-lang="es"] .login-btn, body[data-lang="es"] .signup-btn,
body[data-lang="fr"] .login-btn, body[data-lang="fr"] .signup-btn,
body[data-lang="it"] .login-btn, body[data-lang="it"] .signup-btn {
    font-size: clamp(11px, 2.2vw, 14px);
    padding: clamp(7px, 1.8vw, 10px) clamp(10px, 2.5vw, 16px);
    max-width: clamp(100px, 22vw, 140px);
}

/* 🌐 俄文、泰文、波蘭文、捷克文、匈牙利文、愛沙尼亞文按鈕優化 */
[lang="ru"] .login-btn, [lang="ru"] .signup-btn,
[lang="th"] .login-btn, [lang="th"] .signup-btn,
[lang="pl"] .login-btn, [lang="pl"] .signup-btn,
[lang="cs"] .login-btn, [lang="cs"] .signup-btn,
[lang="hu"] .login-btn, [lang="hu"] .signup-btn,
[lang="et"] .login-btn, [lang="et"] .signup-btn,
body[data-lang="ru"] .login-btn, body[data-lang="ru"] .signup-btn,
body[data-lang="th"] .login-btn, body[data-lang="th"] .signup-btn,
body[data-lang="pl"] .login-btn, body[data-lang="pl"] .signup-btn,
body[data-lang="cs"] .login-btn, body[data-lang="cs"] .signup-btn,
body[data-lang="hu"] .login-btn, body[data-lang="hu"] .signup-btn,
body[data-lang="et"] .login-btn, body[data-lang="et"] .signup-btn {
    font-size: clamp(11px, 2.2vw, 14px);
    padding: clamp(7px, 1.8vw, 10px) clamp(10px, 2.5vw, 16px);
    max-width: clamp(100px, 22vw, 140px);
}

/* 📱 防止長文字語言在手機版 header 按鈕斷行到下一列 */
@media (max-width: 768px) {
    [lang="de"] .auth-buttons,
    [lang="es"] .auth-buttons,
    [lang="fr"] .auth-buttons,
    [lang="it"] .auth-buttons,
    [lang="ru"] .auth-buttons,
    [lang="pl"] .auth-buttons,
    [lang="cs"] .auth-buttons,
    [lang="hu"] .auth-buttons,
    [lang="et"] .auth-buttons {
        flex-shrink: 1 !important;
        min-width: 0;
        max-width: calc(100vw - 215px);
    }

    [lang="de"] .login-btn, [lang="de"] .signup-btn,
    [lang="es"] .login-btn, [lang="es"] .signup-btn,
    [lang="fr"] .login-btn, [lang="fr"] .signup-btn,
    [lang="it"] .login-btn, [lang="it"] .signup-btn,
    [lang="ru"] .login-btn, [lang="ru"] .signup-btn,
    [lang="pl"] .login-btn, [lang="pl"] .signup-btn,
    [lang="cs"] .login-btn, [lang="cs"] .signup-btn,
    [lang="hu"] .login-btn, [lang="hu"] .signup-btn,
    [lang="et"] .login-btn, [lang="et"] .signup-btn {
        flex-shrink: 1 !important;
        min-width: 0 !important;
        overflow: hidden !important;
        text-overflow: ellipsis !important;
        white-space: nowrap !important;
        font-size: 12px !important;
        padding: 6px 8px !important;
    }

}

@media (max-width: 400px) {
    [lang="de"] .auth-buttons,
    [lang="es"] .auth-buttons,
    [lang="fr"] .auth-buttons,
    [lang="it"] .auth-buttons,
    [lang="ru"] .auth-buttons,
    [lang="pl"] .auth-buttons,
    [lang="cs"] .auth-buttons,
    [lang="hu"] .auth-buttons,
    [lang="et"] .auth-buttons {
        max-width: calc(100vw - 185px);
    }

    [lang="de"] .login-btn, [lang="de"] .signup-btn,
    [lang="es"] .login-btn, [lang="es"] .signup-btn,
    [lang="fr"] .login-btn, [lang="fr"] .signup-btn,
    [lang="it"] .login-btn, [lang="it"] .signup-btn,
    [lang="ru"] .login-btn, [lang="ru"] .signup-btn,
    [lang="pl"] .login-btn, [lang="pl"] .signup-btn,
    [lang="cs"] .login-btn, [lang="cs"] .signup-btn,
    [lang="hu"] .login-btn, [lang="hu"] .signup-btn,
    [lang="et"] .login-btn, [lang="et"] .signup-btn {
        font-size: 11px !important;
        padding: 5px 6px !important;
    }

}

.menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* Main Content Styles */
main {
    min-height: calc(100vh - 70px - 250px);
    padding: 40px 0;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

/* Home Page Styles */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 50px;
}

.hero-content {
    flex: 1;
    padding-right: 40px;
    text-align: center;
}

.hero-content h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.hero-content p {
    font-size: 18px;
    margin-bottom: 30px;
    color: var(--gray-color);
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* Live Players Stats - 首頁線上玩家即時統計 (feature-card 風格) */
.live-players-stats {
    margin-top: 30px;
    padding: 20px 25px;
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.live-players-stats:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.live-stats-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 18px;
}

.live-indicator {
    width: 10px;
    height: 10px;
    background: var(--success-color);
    border-radius: 50%;
    animation: pulse-live 2s ease-in-out infinite;
}

@keyframes pulse-live {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.85); }
}

.live-label {
    font-size: 16px;
    font-weight: 600;
    color: var(--secondary-color);
}

.live-stats-grid {
    display: flex;
    gap: 15px;
}

.live-stat-item {
    flex: 1;
    text-align: center;
    padding: 12px 10px;
    background: var(--light-color);
    border-radius: 8px;
    transition: var(--transition);
}

.live-stat-item:hover {
    background: #e8f4fc;
}

.live-stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
    margin-bottom: 6px;
}

.live-stat-label {
    font-size: 12px;
    color: var(--gray-color);
    font-weight: 500;
}

/* 手機版 Live Players Stats */
@media (max-width: 768px) {
    .live-players-stats {
        margin-top: 25px;
        padding: 18px 20px;
    }
    
    .live-stats-header {
        margin-bottom: 15px;
    }
    
    .live-label {
        font-size: 14px;
    }
    
    .live-stats-grid {
        gap: 10px;
    }
    
    .live-stat-item {
        padding: 10px 8px;
    }
    
    .live-stat-value {
        font-size: 22px;
    }
    
    .live-stat-label {
        font-size: 11px;
    }
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.features {
    display: flex;
    justify-content: space-between;
    margin-bottom: 50px;
    gap: 20px;
}

/* Feature Card Link Wrapper */
.feature-card-link {
    flex: 1;
    text-decoration: none;
    color: inherit;
    display: block;
    transition: var(--transition);
}

.feature-card-link:hover {
    text-decoration: none;
    color: inherit;
}

.feature-card {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    height: 100%;
    cursor: pointer;
}

.feature-card-link:hover .feature-card {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.feature-card i {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.feature-card p {
    color: var(--gray-color);
}

.leaderboard-preview {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.leaderboard-preview h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--secondary-color);
    text-align: center;
}

.leaderboard-table {
    width: 100%;
    margin-bottom: 20px;
}

.leaderboard-header {
    display: grid;
    background-color: var(--secondary-color);
    color: white;
    font-weight: 600;
    border-radius: 4px 4px 0 0;
    grid-template-columns: 80px 1fr 120px;  /* 桌機版：Rank 80px, Player 彈性, Rating 120px */
    gap: 15px;
    align-items: center;
}

.leaderboard-header div,
.leaderboard-row div {
    padding: 12px 15px;
}

.leaderboard-row {
    display: grid;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    grid-template-columns: 80px 1fr 120px;  /* 桌機版：Rank 80px, Player 彈性, Rating 120px */
    gap: 15px;
    align-items: center;
}

.leaderboard-row:last-child {
    border-bottom: none;
}

.leaderboard-row:hover {
    background-color: rgba(52, 152, 219, 0.05);
}

.rank {
    text-align: center;
}

.player {
    min-width: 0; /* 允許縮小防止溢出 */
}

.wins,
.losses,
.win-rate,
.rating {
    text-align: center;
}

.leaderboard-preview .btn {
    display: block;
    width: 200px;
    margin: 0 auto;
}

/* 響應式Grid佈局 */
/* 平板版：適中佈局 */
@media (max-width: 768px) {
    .leaderboard-header,
    .leaderboard-row {
        grid-template-columns: 60px 1fr 90px;  /* 平板版：Rank 60px, Player 彈性, Rating 90px */
        gap: 12px;
    }
}

/* 手機版：緊湊佈局 */
@media (max-width: 480px) {
    .leaderboard-header,
    .leaderboard-row {
        grid-template-columns: 50px 1fr 70px;  /* 手機版：Rank 50px, Player 彈性, Rating 70px */
        gap: 10px;
    }
    
    .leaderboard-header div,
    .leaderboard-row div {
        padding: 8px 10px;  /* 手機版減少padding */
    }
}

/* Game Board Styles */
.game-container {
    max-width: 800px;
    margin: 0 auto;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.game-header h2 {
    font-size: 28px;
    color: var(--secondary-color);
}

.room-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 棋盤容器 */
.game-board-container {
    position: relative;
    background-color: #daa06d;
    border-radius: 4px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.3);
    aspect-ratio: 1 / 1;
    max-width: 600px;
    margin: 0 auto 40px;
    padding: 0;
    box-sizing: border-box;
    overflow: visible;
    border: 10px solid #c49665;
}

/* 棋盤 */
.game-board {
    position: relative;
    width: 100%;
    height: 100%;
    display: block;
    box-sizing: border-box;
}

/* 棋盤網格容器 */

/* 水平線 (已由 SVG 向量線取代，保留作為 fallback) */

/* 垂直線 (已由 SVG 向量線取代，保留作為 fallback) */

/* SVG 向量網格線 */

/* 棋盤星位標記 */

/* 棋盤交叉點（落子點） */

/* 根據玩家顏色顯示不同的懸停預覽效果 */

/* Spectate 模式禁用 hover 預覽效果 - 觀眾不能落子 */

/* 棋子 */

/* 高光效果已移除 */

/* 高光效果已移除 */

/* 預覽棋子樣式 - 手機版預覽確認模式 */

/* 電腦版和大平板棋子大小 */

.game-start-overlay,
.game-end-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    border-radius: 8px;
}

/* Hide overlay button (down arrow in content) */
.hide-overlay-btn {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.95);
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 12;
    transition: all 0.3s ease;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.15);
}

.hide-overlay-btn:hover {
    background-color: var(--primary-color);
    transform: translateX(-50%) scale(1.1);
    animation: none;
}

.hide-overlay-btn i {
    font-size: 18px;
    color: var(--primary-color);
    transition: color 0.3s ease;
    animation: bounceDown 2s infinite;
}

.hide-overlay-btn:hover i {
    color: white;
    animation: none;
}

@keyframes bounceDown {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-8px);
    }
    60% {
        transform: translateY(-4px);
    }
}

@keyframes bounceUp {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(8px);
    }
    60% {
        transform: translateY(4px);
    }
}

/* Show overlay button (up arrow below overlay) */
.show-overlay-btn {
    position: absolute;
    bottom: -60px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 50px;
    background-color: rgba(255, 255, 255, 0.95);
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    display: none;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    z-index: 12;
    transition: all 0.3s ease;
    box-shadow: 0 0 8px rgba(0, 0, 0, 0.15);
}

.show-overlay-btn:hover {
    background-color: var(--primary-color);
    transform: translateX(-50%) scale(1.1);
    animation: none;
}

.show-overlay-btn i {
    font-size: 18px;
    color: var(--primary-color);
    transition: color 0.3s ease;
    animation: bounceUp 2s infinite;
}

.show-overlay-btn:hover i {
    color: white;
    animation: none;
}

.show-overlay-btn.visible {
    display: flex !important;
    pointer-events: auto !important;
}

/* Hidden overlay state - only show the show button */
.game-end-overlay.overlay-hidden {
    background-color: transparent;
    pointer-events: none;
}

.game-end-overlay.overlay-hidden .game-end-content {
    display: none;
}

.game-end-overlay.overlay-hidden .hide-overlay-btn {
    display: none;
}

.game-end-overlay.overlay-hidden .show-overlay-btn {
    pointer-events: auto !important;
}

.game-start-content,
.game-end-content {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    max-width: 80%;
}

.game-start-content h2,
.game-end-content h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.game-start-content p {
    margin-bottom: 20px;
    color: var(--gray-color);
}

.game-start-content .rules-info-toggle {
    display: none;
}

.game-start-content .rules-tooltip {
    display: none;
}

.game-start-content .difficulty-cta {
    font-size: 12px;
    color: #95a5a6;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 12px;
}

.difficulty-start-btns {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.difficulty-start-btn {
    display: block;
    width: 100%;
    padding: 11px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
    color: white;
    transition: all 0.2s ease;
}

@media (max-width: 768px) {
    .game-start-content {
        padding: 20px 18px;
    }
    .game-start-content h2 {
        font-size: 22px;
        margin-bottom: 8px;
    }
    .game-start-content p {
        display: none;
    }
    .game-start-content .rules-info-toggle {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        background: none;
        border: 1px solid #bdc3c7;
        border-radius: 14px;
        padding: 3px 10px 3px 6px;
        font-size: 12px;
        color: #7f8c8d;
        cursor: pointer;
        margin-bottom: 10px;
        transition: all 0.2s ease;
    }
    .game-start-content .rules-info-toggle .info-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 16px;
        height: 16px;
        border-radius: 50%;
        background-color: #bdc3c7;
        color: white;
        font-size: 11px;
        font-weight: 700;
        line-height: 1;
        flex-shrink: 0;
    }
    .game-start-content .rules-info-toggle:active {
        background-color: #f0f0f0;
    }
    .game-start-content .rules-tooltip {
        display: none;
        background-color: #f8f9fa;
        border: 1px solid #e0e0e0;
        border-radius: 6px;
        padding: 8px 12px;
        margin-bottom: 10px;
        font-size: 12px;
        color: #555;
        line-height: 1.4;
        text-align: left;
    }
    .game-start-content .rules-tooltip.show {
        display: block;
    }
    .game-start-content .difficulty-cta {
        margin-bottom: 8px;
        font-size: 11px;
    }
    .difficulty-start-btns {
        gap: 6px;
    }
    .difficulty-start-btn {
        padding: 10px 16px;
        font-size: 14px;
    }
}

.difficulty-start-btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.1);
    box-shadow: 0 3px 10px rgba(0,0,0,0.15);
}

.countdown {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    margin: 20px 0;
}

.game-stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 20px 0;
}

.stat {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 14px;
    color: var(--gray-color);
    margin-bottom: 5px;
}

.stat-value {
    font-size: 20px;
    font-weight: 600;
    color: var(--secondary-color);
}

.game-end-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

.game-info {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr; /* 三等分佈局 */
    align-items: center;
    margin-bottom: 20px;
    background-color: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.player-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 第一個玩家靠左對齊 */
.player-info:first-child {
    justify-self: start;
}

/* 第二個玩家靠右對齊 */
.player-info:last-child {
    justify-self: end;
}

/* 黑子玩家向左對齊 */
.player-info:first-child .player-details {
    align-items: flex-start;
    text-align: left;
}

/* 白子玩家向右對齊 */
.player-info:last-child .player-details {
    align-items: flex-end;
    text-align: right;
}

.player-avatar {
    width: 40px;
    height: 40px;
    background-color: var(--light-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    color: var(--gray-color);
}

.player-details {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.player-details h3 {
    font-size: 16px;
    margin-bottom: 5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px; /* 桌機版最大寬度 */
}

.game-status {
    text-align: center;
    justify-self: center; /* 在 Grid 區域內居中 */
}

.timer {
    font-size: 18px;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 5px;
}

.turn-indicator {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
}

.game-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
}

/* Online Battle Styles */
.player-setup {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    max-width: 500px;
    margin: 0 auto;
}

.player-setup h3 {
    font-size: 22px;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.player-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.player-form input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
}

/* 🔧 Room Full - Disabled State */
.player-form input:disabled,
.player-form input.disabled {
    background-color: #f5f5f5;
    color: #999;
    cursor: not-allowed;
    border-color: #ddd;
}

/* Logged-in players: name is taken from their profile nickname. The field
   stays visible but is tinted green and read-only (mirrors Gomoku.com). */
.player-form input.name-locked {
    background-color: #e9f7ef;
    border-color: #34a853;
    color: var(--secondary-color);
    cursor: default;
}
.player-form input.name-locked:focus {
    outline: none;
    box-shadow: 0 0 0 2px rgba(52, 168, 83, 0.25);
}

.player-form button:disabled,
.player-form button.disabled,
#join-game:disabled,
#join-game.disabled {
    background-color: #ccc;
    color: #666;
    cursor: not-allowed;
    opacity: 0.7;
    pointer-events: none;
}

.waiting-message {
    text-align: center;
    color: var(--gray-color);
}

.spinner {
    margin: 20px auto;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 0, 0, 0.1);
    border-left-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.chat-container {
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-top: 20px;
    overflow: hidden;
}

.chat-header {
    padding: 10px 15px;
    background-color: #2c3e50;
    color: white;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.chat-messages {
    height: 200px;
    padding: 15px;
    overflow-y: auto;
    border-bottom: 1px solid var(--border-color);
}

.chat-input {
    display: flex;
    padding: 10px;
}

.chat-input input {
    flex: 1;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px 0 0 4px;
    font-size: 16px;
}

.chat-input button {
    padding: 10px 15px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}

/* ========== Spectate Info Bar ========== */
.spectate-info-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #f1f3f4 100%);
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.spectate-info-bar.hidden {
    display: none;
}

.spectate-viewers {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.6rem;
    background: linear-gradient(135deg, #ff7675, #e17055);
    color: white;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.8rem;
    white-space: nowrap;
    min-width: fit-content;
    flex-shrink: 0; /* 不會被壓縮 */
}

.spectate-viewers i {
    font-size: 0.75rem;
    flex-shrink: 0;
}

.spectate-url-section {
    display: flex;
    flex: 1;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
}

.spectate-url-input {
    flex: 1;
    padding: 0.4rem 0.6rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: #fff;
    color: #555;
    font-size: 0.8rem;
    font-family: 'Courier New', monospace;
    min-width: 0;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.spectate-url-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.copy-url-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem 0.6rem;
    background: linear-gradient(135deg, var(--primary-color), #2980b9);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 34px;
}

.copy-url-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.4);
}

.copy-url-btn:active {
    transform: translateY(0);
}

.copy-url-btn.copied {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
}

.copy-url-btn.copied i::before {
    content: "\f00c"; /* fa-check */
}

/* Mobile responsive for spectate info bar */
@media (max-width: 480px) {
    .spectate-info-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 0.5rem;
        padding: 0.5rem;
    }
    
    .spectate-viewers {
        justify-content: center;
        padding: 0.3rem 0.5rem;
    }
    
    .spectate-url-section {
        width: 100%;
    }
    
    .spectate-url-input {
        font-size: 0.75rem;
    }
}

.message {
    margin-bottom: 10px;
    padding: 8px 12px;
    border-radius: 8px;
    max-width: 80%;
    word-break: break-word;
}

.user-message {
    background-color: var(--primary-color);
    color: white;
    margin-left: auto;
}

.opponent-message {
    background-color: var(--light-color);
}

.system-message {
    text-align: center;
    color: var(--gray-color);
    font-style: italic;
    margin: 10px 0;
}

/* Leaderboard Page Styles */
.leaderboard-container {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.leaderboard-container h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--secondary-color);
    text-align: center;
}

.leaderboard-filters {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 20px;
}

.leaderboard-filters select {
    padding: 8px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: white;
}

.full-leaderboard {
    margin-bottom: 0;
}

/* How to Play Page Styles */
.how-to-play-content {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.how-to-play-content h2 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--secondary-color);
    text-align: center;
}

.rules-section,
.strategy-section {
    margin-bottom: 30px;
}

.rules-section h3,
.strategy-section h3,
.example-section h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.rules-section ul,
.strategy-section ul {
    padding-left: 20px;
}

.rules-section li,
.strategy-section li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 15px;
}

.rules-section li::before,
.strategy-section li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.pattern {
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.pattern h4 {
    margin-bottom: 10px;
    color: var(--secondary-color);
}

/* Contact Us Page Styles */
.contact-content {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.contact-content h2 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--secondary-color);
    text-align: center;
}

.contact-intro {
    margin-bottom: 30px;
    text-align: center;
    font-size: 16px;
    color: var(--gray-color);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.contact-card {
    background-color: var(--light-color);
    border-radius: 8px;
    padding: 25px;
    text-align: center;
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.contact-header {
    margin-bottom: 15px;
}

.contact-header i {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.contact-header h3 {
    font-size: 20px;
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.contact-card p {
    margin-bottom: 15px;
    color: var(--gray-color);
    line-height: 1.6;
}

.contact-email {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
}

.contact-email:hover {
    color: var(--secondary-color);
}

.about-company,
.response-time {
    background-color: var(--light-color);
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 30px;
}

.about-company h3,
.response-time h4 {
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.response-time h4 i {
    margin-right: 8px;
    color: var(--primary-color);
}

/* Privacy Policy Page Styles */
.privacy-content {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.privacy-content h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--secondary-color);
    text-align: center;
}

.last-updated {
    text-align: center;
    margin-bottom: 30px;
    color: var(--gray-color);
    font-style: italic;
}

.privacy-intro {
    margin-bottom: 30px;
    font-size: 16px;
    line-height: 1.7;
    color: var(--dark-color);
    background-color: var(--light-color);
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.privacy-section {
    margin-bottom: 30px;
}

.privacy-section h3 {
    font-size: 22px;
    color: var(--secondary-color);
    margin-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 8px;
}

.privacy-section h4 {
    font-size: 18px;
    color: var(--secondary-color);
    margin: 20px 0 10px 0;
}

.privacy-section p {
    margin-bottom: 15px;
    line-height: 1.6;
    color: var(--dark-color);
}

.privacy-section ul {
    margin-bottom: 15px;
    padding-left: 20px;
}

.privacy-section li {
    margin-bottom: 8px;
    line-height: 1.6;
    position: relative;
    padding-left: 15px;
}

.privacy-section li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.company-info {
    background-color: var(--light-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    border-left: 4px solid var(--primary-color);
}

/* Terms of Service Page Styles */
.terms-content {
    background-color: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: var(--shadow);
}

.terms-content h2 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--secondary-color);
    text-align: center;
}

.terms-intro {
    margin-bottom: 30px;
    font-size: 16px;
    line-height: 1.7;
    color: var(--dark-color);
    background-color: var(--light-color);
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.terms-section {
    margin-bottom: 30px;
}

.terms-section h3 {
    font-size: 22px;
    color: var(--secondary-color);
    margin-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 8px;
}

.terms-section h4 {
    font-size: 18px;
    color: var(--secondary-color);
    margin: 20px 0 10px 0;
}

.terms-section p {
    margin-bottom: 15px;
    line-height: 1.6;
    color: var(--dark-color);
}

.terms-section ul {
    margin-bottom: 15px;
    padding-left: 20px;
}

.terms-section li {
    margin-bottom: 8px;
    line-height: 1.6;
    position: relative;
    padding-left: 15px;
}

.terms-section li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.agreement-notice {
    background-color: var(--light-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    border-left: 4px solid var(--warning-color);
    margin-top: 30px;
}

.rules-section,
.strategy-section {
    margin-bottom: 30px;
}

.rules-section h3,
.strategy-section h3,
.example-section h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.rules-section ul,
.strategy-section ul {
    padding-left: 20px;
}

.rules-section li,
.strategy-section li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 15px;
}

.rules-section li::before,
.strategy-section li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.pattern {
    flex: 1;
    min-width: 200px;
    text-align: center;
}

.pattern h4 {
    margin-bottom: 10px;
    color: var(--secondary-color);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: white;
    border-radius: 8px;
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow);
    animation: modalFadeIn 0.3s;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 22px;
    color: var(--secondary-color);
}

.close-modal {
    font-size: 24px;
    cursor: pointer;
    color: var(--gray-color);
    transition: var(--transition);
}

.close-modal:hover {
    color: var(--danger-color);
}

.modal-body {
    padding: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--gray-color);
}

/* Footer Styles */
footer {
    background-color: var(--secondary-color);
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 30px;
}

.footer-logo,
.footer-links,
.footer-social {
    margin-bottom: 20px;
}

.footer-logo h2 {
    font-size: 24px;
    margin-bottom: 10px;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-links h3,
.footer-social h3 {
    font-size: 18px;
    margin-bottom: 15px;
    font-weight: 600;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: white;
}

/* Footer Dropdown Styles */
.footer-dropdown {
    position: relative;
}

.footer-dropdown-trigger {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: inherit;
    font-family: inherit;
    cursor: pointer;
    padding: 0;
    transition: var(--transition);
    text-align: left;
}

.footer-dropdown-trigger:hover {
    color: white;
}

.footer-dropdown-menu {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 0;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    z-index: 1000;
    margin-bottom: 8px;
    overflow: hidden;
}

.footer-dropdown.active .footer-dropdown-menu {
    display: block;
}

.footer-links .footer-dropdown-item,
.footer-dropdown-item {
    display: block;
    padding: 12px 16px;
    color: #333 !important;
    text-decoration: none;
    transition: background-color 0.2s;
    border-bottom: 1px solid #f0f0f0;
}

.footer-dropdown-item:last-child {
    border-bottom: none;
}

.footer-links .footer-dropdown-item:hover,
.footer-dropdown-item:hover {
    background-color: #f5f5f5;
    color: var(--primary-color) !important;
}

.footer-dropdown-item .item-title {
    display: block;
    font-weight: 600;
    font-size: 14px;
    margin-bottom: 2px;
    color: #333;
}

.footer-dropdown-item .item-desc {
    display: block;
    font-size: 12px;
    color: #888;
}

.footer-dropdown-item:hover .item-title {
    color: var(--primary-color);
}

.footer-dropdown-item:hover .item-desc {
    color: #666;
}

/* Mobile adjustments for footer dropdown */
@media (max-width: 768px) {
    .footer-dropdown-menu {
        position: fixed;
        bottom: auto;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        margin-bottom: 0;
        min-width: 250px;
    }
    
    .footer-dropdown.active::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* Pattern Board Styles */

/* Responsive Styles */
@media (min-width: 769px) and (max-width: 1024px) {
    header .container {
        padding: 12px 15px;
    }
    
    /* 縮小 logo 字體 */
    .logo h1 {
        font-size: 20px !important;
    }
    
    /* 縮小導航選單間距和字體 */
    nav ul li {
        margin-left: 12px;
    }
    
    nav ul li a {
        font-size: 14px;
        padding: 4px 8px;
    }
    
    /* 縮小按鈕尺寸 */
    .auth-buttons {
        gap: 6px;
    }
    
    .auth-buttons button {
        padding: 6px 12px;
        font-size: 13px;
        border-radius: 4px;
        font-weight: 500;
        cursor: pointer;
        transition: var(--transition);
    }
    
    /* 平板版玩家名稱截斷 */
    .player-details h3 {
        max-width: 180px; /* 平板版最大寬度 */
        font-size: 15px;
    }
    
    /* 平板版等寬佈局 */
    .game-info {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr; /* 三等分佈局 */
        align-items: center;
    }
    
    .player-info:first-child {
        justify-self: start;
    }
    
    .player-info:last-child {
        justify-self: end;
    }
    
    .game-status {
        justify-self: center;
    }
}

@media (max-width: 992px) {
    .hero {
        flex-direction: column;
    }

    .hero-content {
        padding-right: 0;
        margin-bottom: 30px;
        text-align: center;
    }

    .hero-buttons {
        justify-content: center;
    }

    .features {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-logo,
    .footer-links,
    .footer-social {
        width: 100%;
        margin-bottom: 30px;
    }
}

/* 修復聊天訊息樣式（確保不被彈窗樣式覆蓋，同時保持原始樣式） */
.chat-messages .message {
    opacity: 1 !important;
    position: static !important;
    z-index: auto !important;
    display: block !important;
    visibility: visible !important;
    /* 恢復原始聊天訊息樣式 */
    margin-bottom: 10px;
    padding: 8px 12px;
    border-radius: 8px;
    max-width: 80%;
    word-break: break-word;
}

.chat-messages .message.user-message {
    background-color: var(--primary-color) !important;
    color: white !important;
    margin-left: auto;
}

.chat-messages .message.opponent-message {
    background-color: var(--light-color) !important;
    color: inherit !important;
}

/* 右上角聊天彈窗樣式 */
.chat-notifications {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1000;
    pointer-events: none;
}

.chat-popup {
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    margin-bottom: 10px;
    padding: 12px 16px;
    max-width: 300px;
    animation: slideInRight 0.3s ease-out;
    pointer-events: auto;
    border-left: 4px solid #b8845a;
    background: linear-gradient(135deg, #fdf9f4 0%, #faf6f1 100%);
}

.chat-popup.user-message {
    border-left-color: #b8845a;
    background: linear-gradient(135deg, #fdf9f4 0%, #faf6f1 100%);
}

.chat-popup.opponent-message {
    border-left-color: #b8845a;
    background: linear-gradient(135deg, #fdf9f4 0%, #faf6f1 100%);
}

.chat-popup .popup-content {
    font-size: 14px;
    line-height: 1.4;
}

.chat-popup .popup-sender {
    font-weight: 600;
    color: #b8845a;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.chat-popup.user-message .popup-sender {
    color: #b8845a;
}

.chat-popup.opponent-message .popup-sender {
    color: #b8845a;
}

.chat-popup .popup-message {
    color: #555;
    word-wrap: break-word;
}

/* 棋子圖示樣式 - 經典光澤風格 */

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.chat-popup.fade-out {
    animation: fadeOut 0.3s ease-out forwards;
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

@media (max-width: 768px) {
    /* 手機版聊天彈窗調整 */
    .chat-notifications {
        top: 70px;
        right: 10px;
        left: 10px;
    }
    
    .chat-popup {
        max-width: none;
        margin-left: 0;
        margin-right: 0;
    }
    
    header .container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 15px 20px;
        flex-wrap: wrap;
        position: relative;
    }
    
    /* 將menu-toggle移到最左邊 */
    .menu-toggle {
        order: -1;
        display: block;
        font-size: 24px;
        cursor: pointer;
        margin-right: 15px;
        flex-shrink: 0;
    }
    
    /* Logo 佔據彈性空間，可在窄螢幕等比例縮放以維持單行 */
    .logo {
        flex: 1 1 auto;
        min-width: 0;
        margin-left: 0;
        overflow: hidden;
    }
    
    .logo h1 {
        /* 響應式字級：寬螢幕維持 24px，窄螢幕平滑縮小，確保整行不換行 */
        font-size: clamp(17px, 4.8vw, 24px) !important;
        font-weight: 700;
        color: var(--primary-color);
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .logo h1 a {
        white-space: nowrap;
    }
    
    /* 按鈕維持固定尺寸、不換行也不壓縮，永遠留在第一排 */
    .auth-buttons {
        display: flex;
        gap: 6px;
        flex-shrink: 0;
        flex-wrap: nowrap;
        order: 2;
    }
    
    .auth-buttons button {
        padding: 6px 10px;
        font-size: 13px;
        border-radius: 4px;
        font-weight: 500;
        cursor: pointer;
        transition: var(--transition);
        white-space: nowrap;
    }
    
    /* 確保nav保持在下方 */
    nav {
        order: 3;
        width: 100%;
        margin-top: 15px;
        display: none;
    }
    
    nav.active {
        display: block;
    }
    
    nav ul {
        flex-direction: column;
        width: 100%;
        align-items: stretch;
    }
    
    nav ul li {
        margin: 0;
        display: block;
        width: 100%;
    }
    
    nav ul li a {
        display: block;
        padding: 13px 10px;
        border-bottom: 1px solid var(--border-color);
        text-align: left;
        width: 100%;
        line-height: normal;
    }
    
    /* Mobile nav-dropdown fixes */
    nav ul li.nav-dropdown {
        display: block;
        width: 100%;
    }

    .player-form {
        flex-direction: column;
    }

    .game-info {
        flex-direction: column;
        gap: 15px;
    }

    .game-status {
        order: -1;
    }

    .leaderboard-header div,
    .leaderboard-row div {
        padding: 8px;
        font-size: 14px;
    }
}

/* iPhone 13 mini 及類似小屏幕優化 (400px以下) */
@media (max-width: 400px) {
    header .container {
        padding: 12px 15px;
    }
    
    .menu-toggle {
        margin-right: 10px !important;
        font-size: 22px !important;
    }
    
    /* Logo 在 400px 以下繼續等比例縮放，避免擠到按鈕換行 */
    .logo h1 {
        font-size: clamp(15px, 4.6vw, 21px) !important;
    }
    
    .auth-buttons {
        gap: 4px;
    }
    
    .auth-buttons button {
        padding: 5px 8px;
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 18px;
    }

    .auth-buttons button {
        padding: 5px 10px;
        font-size: 12px;
    }

    .hide-overlay-btn {
        width: 36px;
        height: 36px;
        bottom: -6px;
    }
}

@media (max-width: 360px) {
    .logo h1 {
        font-size: 16px;
    }

    .auth-buttons button {
        padding: 4px 8px;
        font-size: 11px;
    }
}

@media (max-width: 576px) {
    .hero-content h2 {
        font-size: 32px;
    }

    .game-end-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .modal-content {
        width: 90%;
    }
}

/* Authentication Styles */
.profile-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    position: relative;
}

.player-name {
    font-weight: 500;
}

.profile-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: white;
    border-radius: 4px;
    box-shadow: var(--shadow);
    min-width: 150px;
    z-index: 100;
    display: none;
}

.profile-dropdown.active {
    display: block;
}

.profile-dropdown ul {
    padding: 0;
}

.profile-dropdown ul li {
    margin: 0;
}

.profile-dropdown ul li a {
    display: block;
    padding: 10px 15px;
    color: var(--dark-color);
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
}

.profile-dropdown ul li:last-child a {
    border-bottom: none;
}

.profile-dropdown ul li a:hover {
    background-color: var(--light-color);
    color: var(--primary-color);
}

/* Notification Styles */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.notification {
    background-color: white;
    border-radius: 4px;
    box-shadow: var(--shadow);
    padding: 15px;
    min-width: 300px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.notification.success {
    border-left: 4px solid var(--success-color);
}

.notification.error {
    border-left: 4px solid var(--danger-color);
}

.notification.warning {
    border-left: 4px solid var(--warning-color);
}

.notification-message {
    flex: 1;
}

.notification-close {
    cursor: pointer;
    font-size: 18px;
    color: var(--gray-color);
    transition: var(--transition);
}

.notification-close:hover {
    color: var(--danger-color);
}

/* Private Room Toggle Switch */
.private-room-toggle {
    margin: 1rem 0 1.5rem 0;
    display: flex;
    justify-content: center;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

.toggle-text {
    font-weight: 500;
    color: var(--text-color);
    font-size: 0.95rem;
}

.toggle-switch {
    position: relative;
    width: 50px;
    height: 26px;
}

.toggle-switch input[type="checkbox"] {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: 0.3s;
    border-radius: 26px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

input:checked + .slider {
    background-color: var(--primary-color);
}

input:focus + .slider {
    box-shadow: 0 0 1px var(--primary-color);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

/* Room Options Row - Container for Private Room & Spectate */
.room-options-row {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin: 1rem 0 1.5rem 0;
    flex-wrap: wrap;
}

.room-options-row .private-room-toggle {
    margin: 0;
}

/* Spectate Toggle */
.spectate-toggle {
    display: flex;
    align-items: center;
}

.spectate-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

.spectate-text {
    font-weight: 500;
    color: var(--text-color);
    font-size: 0.95rem;
}

/* Spectate Info Icon with Tooltip */
.spectate-info-icon {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: #888;
    font-size: 0.85rem;
    transition: color 0.2s ease;
    outline: none;
}

.spectate-info-icon:hover,
.spectate-info-icon:focus {
    color: var(--primary-color);
}

.spectate-info-icon i {
    pointer-events: none;
}

.spectate-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background-color: #333;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 400;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Tooltip arrow */
.spectate-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: #333;
}

/* Show tooltip on hover and focus */
.spectate-info-icon:hover .spectate-tooltip,
.spectate-info-icon:focus .spectate-tooltip,
.spectate-info-icon.active .spectate-tooltip {
    opacity: 1;
    visibility: visible;
}

.spectate-select {
    padding: 0.4rem 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    background-color: white;
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 70px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23333' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    padding-right: 28px;
}

.spectate-select:hover {
    border-color: var(--primary-color);
}

.spectate-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

.spectate-select option {
    padding: 0.5rem;
}

/* Spectate Eye Icon in Dashboard */
.spectate-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    margin-right: 8px;
    transition: all 0.3s ease;
}

.spectate-icon i {
    font-size: 14px;
}

.spectate-icon.disabled {
    color: #aaa;
    background: #f0f0f0;
    cursor: not-allowed;
    opacity: 0.6;
}

.spectate-icon.active {
    color: white;
    background: linear-gradient(135deg, #ff7675, #e17055);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(255, 118, 117, 0.4);
}

.spectate-icon.active:hover {
    transform: scale(1.1);
    box-shadow: 0 3px 12px rgba(255, 118, 117, 0.5);
}

/* Spectate Consent Modal */
.spectate-consent-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

.spectate-consent-content {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    max-width: 420px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

.spectate-consent-content h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.spectate-consent-content h3 i {
    color: #e17055;
}

.spectate-consent-content p {
    color: #555;
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-size: 0.95rem;
}

.spectate-consent-content .player-name {
    font-weight: 600;
    color: var(--primary-color);
}

.spectate-consent-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.spectate-consent-buttons button {
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    min-width: 100px;
}

.spectate-consent-buttons .btn-accept {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    color: white;
    border: none;
}

.spectate-consent-buttons .btn-accept:hover {
    background: linear-gradient(135deg, #219a52, #27ae60);
    transform: translateY(-1px);
}

.spectate-consent-buttons .btn-decline {
    background: #f8f9fa;
    color: #555;
    border: 1px solid #ddd;
}

.spectate-consent-buttons .btn-decline:hover {
    background: #e9ecef;
}

/* Spectator Mode Header - h2 with LIVE badge */
.game-header h2:has(.spectator-mode-indicator) {
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0;
}

/* Spectator Mode Header Indicator */
.spectator-mode-indicator {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    background: linear-gradient(135deg, #ff7675, #e17055);
    color: white;
    padding: 0.2rem 0.55rem;
    border-radius: 10px;
    font-size: 0.65rem;
    font-weight: 600;
    margin-left: 0.6rem;
    vertical-align: middle;
    animation: pulse 2s infinite;
    line-height: 1;
    white-space: nowrap;
}

.spectator-mode-indicator i {
    font-size: 0.6rem;
}

/* Spectator Mode Indicator - ENDED/OFFLINE State */
.spectator-mode-indicator.ended {
    background: linear-gradient(135deg, #95a5a6, #7f8c8d);
    animation: none;
}

/* Spectator Mode Indicator - PAUSED State (a player dropped, game still live).
   Amber rather than the grey of .ended: the game has not finished, it is only
   waiting for someone to reconnect. Keeps the pulse so it reads as ongoing. */
.spectator-mode-indicator.waiting {
    background: linear-gradient(135deg, #e8a33d, #d4881f);
}

/* Spectator Mode Indicator - INVALID/ERROR State */
.spectator-mode-indicator.invalid {
    background: linear-gradient(135deg, #636e72, #2d3436);
    animation: none;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.8;
    }
}

/* Spectator Disabled Chat */
.chat-input.spectator-disabled {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.chat-input.spectator-disabled input,
.chat-input.spectator-disabled button {
    background-color: #f0f0f0;
    color: #999;
    cursor: not-allowed;
}

.chat-input.spectator-disabled::after {
    content: "Spectators cannot send messages";
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
}

.chat-input.spectator-disabled:hover::after {
    opacity: 1;
}

/* Spectator Game End - result display with player names and stones */
.game-end-content .result-players {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 0.3rem 0;
}

.game-end-content .result-players.loser {
    opacity: 0.7;
}

.game-end-content .result-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #27ae60;
    margin-left: 0.5rem;
}

.game-end-content .result-versus {
    font-size: 0.75rem;
    color: #888;
    margin: 0.2rem 0;
}

.game-end-content .winner-name {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 700;
    color: #27ae60;
    font-size: 1rem;
}

.game-end-content .loser-name {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
    color: #e74c3c;
    font-size: 0.95rem;
}

.game-end-content .draw-text {
    display: block;
    font-size: 1rem;
    color: #666;
    margin: 0.5rem 0;
}

/* Spectator note in game end buttons */
.spectator-note {
    font-size: 0.8rem;
    color: #888;
    font-style: italic;
    margin: 0 0 0.5rem 0;
}

/* Player profile link in spectate and online battle modes */
.player-profile-link {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.player-profile-link:hover {
    color: var(--primary-color) !important;
    text-decoration: underline;
}

/* Clickable avatar for profile link */
.player-avatar[style*="cursor: pointer"] {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.player-avatar[style*="cursor: pointer"]:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Spectate page game-end-buttons layout */
#spectate-game-end-overlay .game-end-buttons {
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.25rem;
}

/* Spectate page hide button positioning - inside the content */
#spectate-game-end-overlay .game-end-content {
    padding-bottom: 70px; /* Space for hide button */
    position: relative;
}

#spectate-game-end-overlay .hide-overlay-btn {
    bottom: 15px;
}

/* ========== Spectate Result List - Clean Design ========== */
.spectate-result-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin: 1rem 0;
    padding: 0 0.5rem;
}

.spectate-result-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.spectate-result-row.winner {
    background: linear-gradient(135deg, rgba(218, 160, 109, 0.15), rgba(196, 154, 108, 0.1));
    border-left: 3px solid #daa06d;
}

.spectate-result-row.loser {
    background: rgba(0, 0, 0, 0.03);
    border-left: 3px solid #bdc3c7;
    opacity: 0.75;
}

.spectate-result-row .player-name {
    font-weight: 600;
    font-size: 1rem;
    color: #2c3e50;
    flex: 1;
    text-align: left;
}

.spectate-result-row.winner .player-name {
    color: #8b5a2b;
}

.spectate-result-row.loser .player-name {
    color: #7f8c8d;
}

.result-badge {
    font-size: 0.65rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.result-badge.winner-badge {
    background: linear-gradient(135deg, #daa06d, #c49a6c);
    color: #4a3520;
}

/* Room item with spectate icon - 樣式已整合到下方 .rooms-list 區域 */
/* 保留這些子元素樣式用於兼容性 */

.room-item .room-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Mobile responsive for room options */
@media (max-width: 480px) {
    .room-options-row {
        flex-direction: row;
        flex-wrap: nowrap;
        gap: 0.75rem;
        justify-content: center;
    }
    
    .room-options-row .toggle-label {
        gap: 0.4rem;
    }
    
    .room-options-row .toggle-text {
        font-size: 0.85rem;
    }
    
    .room-options-row .toggle-switch {
        width: 42px;
        height: 22px;
    }
    
    .room-options-row .toggle-switch .slider:before {
        height: 16px;
        width: 16px;
        left: 3px;
        bottom: 3px;
    }
    
    .room-options-row input:checked + .slider:before {
        transform: translateX(20px);
    }
    
    .spectate-label {
        gap: 0.4rem;
    }
    
    .spectate-text {
        font-size: 0.85rem;
    }
    
    .spectate-info-icon {
        font-size: 0.75rem;
    }
    
    /* Mobile tooltip - position to the left of the icon */
    .spectate-tooltip {
        font-size: 0.75rem;
        padding: 8px 12px;
        white-space: nowrap;
        max-width: none;
        text-align: center;
        /* Position to the left instead of above */
        bottom: auto;
        top: 50%;
        left: auto;
        right: calc(100% + 10px);
        transform: translateY(-50%);
    }
    
    /* Arrow points right on mobile */
    .spectate-tooltip::after {
        top: 50%;
        left: 100%;
        right: auto;
        bottom: auto;
        transform: translateY(-50%);
        border: 6px solid transparent;
        border-left-color: #333;
        border-top-color: transparent;
    }
    
    .spectate-select {
        min-width: 55px;
        font-size: 0.8rem;
        padding: 0.3rem 0.5rem;
        padding-right: 20px;
    }
    
    .spectate-select {
        min-width: 65px;
        font-size: 0.85rem;
        padding: 0.35rem 0.6rem;
        padding-right: 24px;
    }
    
    .spectator-mode-indicator {
        margin-left: 0.5rem;
        font-size: 0.6rem;
        padding: 0.2rem 0.5rem;
        border-radius: 10px;
        gap: 0.25rem;
    }
    
    .spectator-mode-indicator i {
        font-size: 0.6rem;
    }
    
    .spectate-consent-content {
        padding: 1.5rem;
    }
    
    .spectate-consent-buttons {
        flex-direction: column;
    }
    
    .spectate-consent-buttons button {
        width: 100%;
    }
    
    /* 📱 Spectate Page Header Mobile Layout */
    /* Row 1: Title (Player1 vs Player2) - full width */
    /* Row 2: LIVE icon on left, Room ID on right */
    #spectate-page .game-header {
        display: grid;
        grid-template-columns: 1fr auto;
        grid-template-rows: auto auto;
        grid-template-areas:
            "title title"
            "live room-id";
        gap: 0.5rem;
        align-items: center;
    }
    
    #spectate-page .game-header h2 {
        display: contents;
    }
    
    #spectate-page .game-header #spectate-title {
        grid-area: title;
        font-size: 28px;
        color: var(--secondary-color);
        line-height: 1.3;
        word-break: break-word;
    }
    
    #spectate-page .game-header .spectator-mode-indicator {
        grid-area: live;
        justify-self: start;
        margin-left: 0;
    }
    
    #spectate-page .game-header .room-info {
        grid-area: room-id;
        justify-self: end;
    }
}

/* Spectate Page Loading State */
.spectate-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
    padding: 2rem;
}

.spectate-loading .loading-content {
    text-align: center;
}

.spectate-loading .spinner {
    width: 50px;
    height: 50px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

.spectate-loading p {
    color: #666;
    font-size: 1.1rem;
}

/* Spectate Page Error State */
.spectate-error {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
    padding: 2rem;
}

.spectate-error .error-content {
    text-align: center;
    max-width: 400px;
}

.spectate-error .error-content i {
    font-size: 4rem;
    color: #e74c3c;
    margin-bottom: 1rem;
}

.spectate-error .error-content h3 {
    color: #333;
    margin-bottom: 0.5rem;
}

.spectate-error .error-content p {
    color: #666;
    margin-bottom: 1.5rem;
}

/* Spectator Badge in Chat Header */
.chat-header h3 {
    display: inline-flex;
    align-items: center;
    margin: 0;
}

.spectator-badge {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    font-weight: normal;
    margin-left: 0.5rem;
    vertical-align: middle;
}

/* Spectate Chat Message Styling */
.chat-message .message-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 2px;
}

.chat-message .message-header .player-name {
    font-weight: 600;
    color: #333;
}

.chat-message.player1-message .message-header .player-name {
    color: #333;
}

.chat-message.player2-message .message-header .player-name {
    color: #333;
}

/* Animation Keyframes */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Private Room URL */
.private-room-url {
    margin: 1rem 0;
    padding: 1rem;
    background: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.private-room-url h4 {
    margin: 0 0 0.75rem 0;
    color: var(--primary-color);
    font-size: 0.9rem;
    text-align: center;
}

.url-container {
    display: flex;
    gap: 0.5rem;
}

.url-container input {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-color);
    color: var(--text-color);
    font-size: 0.85rem;
}

.url-container button {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    white-space: nowrap;
}

/* Join Private Room */
.join-private-room {
    margin: 1rem 0;
    padding: 1rem;
    background: var(--success-color-light, #e8f5e8);
    border-radius: 8px;
    border: 1px solid var(--success-color);
}

.private-room-info h4 {
    margin: 0 0 0.5rem 0;
    color: var(--success-color);
    font-size: 0.95rem;
    text-align: center;
}

.private-room-info p {
    margin: 0;
    color: var(--text-color);
    font-size: 0.85rem;
    text-align: center;
    opacity: 0.8;
}

/* Battle Dashboard */
.battle-dashboard {
    margin: 2rem 0;
    padding: 0;
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    overflow: visible;
}

.battle-dashboard h3 {
    margin: 0;
    padding: 1.25rem 1.5rem;
    color: white;
    background: linear-gradient(135deg, var(--primary-color), #2980b9);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.dashboard-content {
    min-height: 200px;
    max-height: 400px;
    overflow-y: auto;
    padding: 1rem;
}

.rooms-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.room-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--light-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.room-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 4px;
    height: 100%;
    background: var(--gray-color);
    transition: all 0.3s ease;
}

.room-item:hover {
    background: #f8f9fa;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.15);
}

.room-item.waiting::before {
    background: var(--warning-color, #f39c12);
}

.room-item.playing::before {
    background: var(--success-color);
}

.room-item.private::before {
    background: var(--primary-color);
}

.room-item .room-info {
    flex: 1;
}

.room-item .room-info .room-id {
    font-weight: 600;
    color: var(--secondary-color);
    font-size: 0.95rem;
    margin-bottom: 0.3rem;
}

.room-item .room-info .room-players {
    font-size: 0.85rem;
    color: var(--gray-color);
    line-height: 1.3;
}

/* 🎨 Dashboard Avatar Styles */
.room-players-with-avatars {
    display: flex;
    align-items: center;
    gap: 6px;
    /* 維持原本 .room-players 的字體大小和顏色 */
    font-size: 0.85rem;
    color: var(--gray-color);
    line-height: 1.3;
    flex-wrap: nowrap;
    min-width: 0;
}

.room-players-with-avatars .player-name-text {
    /* 桌機版：不截斷名稱，保持完整顯示 */
    white-space: nowrap;
}

.room-players-with-avatars .vs-separator {
    flex-shrink: 0;
    /* 維持原本的顏色 */
    color: var(--gray-color);
    padding: 0 2px;
}

/* Dashboard Avatar - matching spectate icon size (28px) */
.dashboard-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    min-width: 28px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.dashboard-avatar.guest {
    background: linear-gradient(145deg, #e0e0e0, #c8c8c8);
    color: #888;
    cursor: default;
}

.dashboard-avatar.guest i {
    font-size: 12px;
}

.dashboard-avatar.authenticated {
    background: linear-gradient(145deg, #f8f9fa, #e9ecef);
    border: 2px solid #ddd;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.dashboard-avatar.authenticated img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.dashboard-avatar.authenticated:hover {
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

a.dashboard-avatar.authenticated:hover {
    border-color: var(--primary-color);
}

/* Mobile RWD for Dashboard Avatars */
/* 臨界值 768px: 平板/小螢幕筆電 */
@media (max-width: 768px) {
    .room-players-with-avatars {
        gap: 4px;
    }
    
    /* 暫時移除名稱最大寬度限制，測試效果 */
    /* .room-players-with-avatars .player-name-text {
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 140px;
        flex-shrink: 1;
    } */
    
    .dashboard-avatar {
        width: 24px;
        height: 24px;
        min-width: 24px;
    }
    
    .dashboard-avatar.guest i {
        font-size: 10px;
    }
}

/* 臨界值 480px: 手機版 */
@media (max-width: 480px) {
    .room-players-with-avatars {
        gap: 3px;
    }
    
    /* 暫時移除名稱最大寬度限制，測試效果 */
    /* .room-players-with-avatars .player-name-text {
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 100px;
        flex-shrink: 1;
    } */
    
    .room-players-with-avatars .vs-separator {
        padding: 0 1px;
    }
    
    .dashboard-avatar {
        width: 20px;
        height: 20px;
        min-width: 20px;
    }
    
    .dashboard-avatar.guest i {
        font-size: 9px;
    }
    
    .dashboard-avatar.authenticated {
        border-width: 1px;
    }
}

.room-status {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--secondary-color);
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3);
}

.status-indicator.waiting {
    background-color: var(--warning-color, #f39c12);
    animation: pulse 2s infinite;
}

.status-indicator.playing {
    background-color: var(--success-color);
}

.status-indicator.private {
    background-color: var(--primary-color);
}

.no-rooms {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 3rem 2rem;
    color: var(--gray-color);
    background: #faf8f2;
    border-radius: 6px;
    border: 1px solid #dedbd0;
    margin: 0;
}

.no-rooms::before {
    content: '';
    display: block;
    width: 40px;
    height: 40px;
    background: url('/images/art/empty-table.svg') center / contain no-repeat;
    margin-bottom: 1rem;
    opacity: 0.85;
}

.no-rooms .no-rooms-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.no-rooms .no-rooms-subtitle {
    font-size: 0.9rem;
    color: var(--gray-color);
    line-height: 1.4;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.1);
    }
}

/* Custom scrollbar for dashboard */
.dashboard-content::-webkit-scrollbar {
    width: 6px;
}

.dashboard-content::-webkit-scrollbar-track {
    background: var(--light-color);
    border-radius: 3px;
}

.dashboard-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.dashboard-content::-webkit-scrollbar-thumb:hover {
    background: var(--gray-color);
}

/* Responsive Design for New Elements */
@media (max-width: 768px) {
    .battle-dashboard {
        margin: 1.5rem 0;
    }
    
    .battle-dashboard h3 {
        padding: 1rem;
        font-size: 1rem;
    }
    
    .dashboard-content {
        padding: 0.75rem;
        min-height: 150px;
        max-height: 300px;
    }
    
    .private-room-url {
        padding: 0.75rem;
    }
    
    .url-container {
        flex-direction: column;
    }
    
    .url-container button {
        width: 100%;
    }
    
    /* 手機版 room-item 使用 CSS Grid 重新佈局 */
    /* Row 1: Room ID (左) + Room Status (右) */
    /* Row 2: Players (左) */
    .room-item {
        padding: 0.75rem;
        display: grid;
        grid-template-columns: 1fr auto;
        grid-template-rows: auto auto;
        grid-template-areas: 
            "room-id room-status"
            "players players";
        gap: 0.4rem 0.5rem;
        align-items: center;
    }
    
    .room-item .room-info {
        display: contents;
    }
    
    .room-item .room-info .room-id {
        grid-area: room-id;
        margin-bottom: 0;
    }
    
    .room-item .room-info .room-players,
    .room-item .room-info .room-players-with-avatars {
        grid-area: players;
        justify-self: start;
    }
    
    .room-status {
        grid-area: room-status;
        justify-self: end;
    }
    
    .toggle-label {
        gap: 0.5rem;
    }
    
    .toggle-text {
        font-size: 0.9rem;
    }
    
    .no-rooms {
        padding: 2rem 1rem;
    }
    
    .no-rooms::before {
        font-size: 2rem;
        margin-bottom: 0.75rem;
    }
    
    .no-rooms .no-rooms-title {
        font-size: 1rem;
    }
    
    .no-rooms .no-rooms-subtitle {
        font-size: 0.85rem;
    }
}

/* Room Error Container */
.room-error-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 400px;
    padding: 2rem;
    width: 100%;
    background: var(--light-color);
    border-radius: 8px;
    margin: 2rem 0;
}

.room-error-message {
    text-align: center;
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 100%;
    border: 2px solid var(--border-color);
}

.room-error-message h3 {
    color: var(--danger-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.room-error-message p {
    color: var(--gray-color);
    margin-bottom: 2rem;
    line-height: 1.6;
    font-size: 1rem;
}

.room-error-message .btn {
    padding: 12px 24px;
    font-size: 1rem;
    min-width: 200px;
}

/* Language Dropdown Styles */
.language-dropdown {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.language-dropdown label {
    color: #bdc3c7;
    font-size: 0.9rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.language-dropdown label i {
    font-size: 1rem;
}

.language-dropdown select {
    background-color: #34495e;
    color: #bdc3c7;
    border: 1px solid #4a5f7a;
    border-radius: 5px;
    padding: 0.5rem;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.language-dropdown select:hover {
    border-color: #e74c3c;
    background-color: #3c5a78;
}

.language-dropdown select:focus {
    outline: none;
    border-color: #e74c3c;
    box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.2);
}

.language-dropdown select option {
    background-color: #34495e;
    color: #bdc3c7;
    padding: 0.5rem;
}

@media (max-width: 768px) {
    .language-dropdown {
        align-items: center;
        flex-direction: row;
        gap: 1rem;
        justify-content: center;
    }
    
    .language-dropdown label {
        margin-bottom: 0;
        white-space: nowrap;
    }
    
    .language-dropdown select {
        min-width: 120px;
    }
}

/* 大螢幕設備（電腦版和大平板）的按鈕位置調整 */
@media (min-width: 769px) {
    .hide-overlay-btn {
        bottom: 105px;
    }
    
    .show-overlay-btn {
        bottom: -8px;
    }
}

/* 手機版響應式調整 */
@media (max-width: 768px) {
    .hide-overlay-btn {
        width: 40px;
        height: 40px;
        bottom: 50px;
    }
    
    .hide-overlay-btn i {
        font-size: 16px;
    }
    
    .show-overlay-btn {
        width: 40px;
        height: 40px;
        bottom: -8px;
    }
    
    .show-overlay-btn i {
        font-size: 16px;
        animation: bounceUp 2s infinite;
    }
}

/* 小屏幕進一步調整 */
@media (max-width: 480px) {
    .hide-overlay-btn {
        width: 36px;
        height: 36px;
        bottom: -8px;
    }
    
    .hide-overlay-btn i {
        font-size: 14px;
    }
    
    .show-overlay-btn {
        width: 36px;
        height: 36px;
        bottom: -8px;
    }
    
    .show-overlay-btn i {
        font-size: 14px;
        animation: bounceUp 2s infinite;
    }
}

/* 等待手机版创建者重连的提示样式 */
.wait-creator-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.wait-creator-content {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    animation: waitCreatorSlideIn 0.5s ease-out;
}

@keyframes waitCreatorSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.wait-creator-icon {
    margin-bottom: 20px;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.wait-creator-title {
    color: var(--secondary-color);
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 15px;
}

.wait-creator-message {
    color: var(--gray-color);
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 25px;
}

.wait-creator-room-info {
    background: var(--light-color);
    padding: 12px 20px;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.wait-creator-room-info span {
    font-weight: 600;
    color: var(--secondary-color);
    font-family: 'Courier New', monospace;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .wait-creator-content {
        padding: 30px 20px;
        margin: 20px;
    }
    
    .wait-creator-title {
        font-size: 20px;
    }
    
    .wait-creator-message {
        font-size: 14px;
    }
    
    .loading-spinner {
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 480px) {
    .wait-creator-content {
        padding: 25px 15px;
    }
    
    .wait-creator-title {
        font-size: 18px;
    }
    
    .wait-creator-message {
        font-size: 13px;
    }
}

/* 系統通知樣式 */
.system-notifications {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1001;
    pointer-events: none;
    max-width: 350px;
}

.system-notification {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.25);
    margin-bottom: 15px;
    padding: 0;
    animation: slideInRight 0.4s ease-out;
    pointer-events: auto;
    cursor: pointer;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 2px solid rgba(255,255,255,0.1);
}

.system-notification:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(0,0,0,0.35);
    border-color: rgba(255,255,255,0.2);
}

.online-battle-notification {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    border: 1px solid #4a6741;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
    position: relative;
    overflow: visible;
}

.online-battle-notification:hover {
    background: linear-gradient(135deg, #34495e 0%, #2c3e50 100%);
    border-color: #5a7a51;
    transform: translateY(-2px);
    box-shadow: 0 15px 45px rgba(0,0,0,0.4);
}

.online-battle-notification::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, transparent 50%, rgba(0,0,0,0.1) 100%);
    border-radius: inherit;
    pointer-events: none;
}

.notification-close {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(231, 76, 60, 0.8);
    border: 1px solid rgba(231, 76, 60, 0.6);
    color: #fff;
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.2s ease;
    line-height: 1;
    padding: 0;
    z-index: 3;
}

.notification-close:hover {
    background: rgba(231, 76, 60, 1);
    border-color: rgba(231, 76, 60, 0.8);
    transform: scale(1.1);
    box-shadow: 0 2px 8px rgba(231, 76, 60, 0.4);
}

.notification-close:active {
    transform: scale(0.95);
}

.notification-content {
    padding: 16px 20px;
    color: #ecf0f1;
    position: relative;
    z-index: 2;
}

.notification-text {
    line-height: 1.5;
    overflow: hidden; /* 清除浮動 */
}

.notification-text::after {
    content: "";
    display: table;
    clear: both;
}

.notification-title {
    font-weight: 700;
    font-size: 17px;
    margin-bottom: 6px;
    text-shadow: 0 1px 2px rgba(0,0,0,0.3);
    letter-spacing: 0.3px;
    color: #ecf0f1;
}

.notification-message {
    font-size: 14px;
    margin-bottom: 8px;
    opacity: 0.9;
    font-weight: 500;
    line-height: 1.4;
    color: #bdc3c7;
}

.notification-action {
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: #fff;
    background: linear-gradient(135deg, #e67e22 0%, #d35400 100%);
    padding: 8px 12px;
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
    border: none;
    transition: all 0.2s ease;
    box-shadow: 0 3px 10px rgba(230, 126, 34, 0.3);
    float: right;
    margin-left: auto;
}

.notification-action:hover {
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
    transform: translateY(-1px);
    box-shadow: 0 5px 15px rgba(230, 126, 34, 0.4);
}

.action-icon {
    font-size: 14px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-3px);
    }
    60% {
        transform: translateY(-2px);
    }
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

.system-notification.fade-out {
    animation: fadeOutRight 0.4s ease-out forwards;
}

@keyframes fadeOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

@media (max-width: 768px) {
    .system-notifications {
        top: 70px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
    
    .system-notification {
        margin-left: 0;
        margin-right: 0;
    }
    
    .notification-content {
        padding: 14px 16px;
    }
    
    .notification-icon {
        font-size: 28px;
        margin-right: 12px;
    }
    
    .notification-title {
        font-size: 15px;
    }
    
    .notification-message {
        font-size: 13px;
    }
    
    .notification-action {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .system-notifications {
        top: 60px;
        right: 5px;
        left: 5px;
    }
    
    .notification-content {
        padding: 12px 14px;
    }
    
    .notification-icon {
        font-size: 24px;
        margin-right: 10px;
    }
    
    .notification-title {
        font-size: 14px;
    }
    
    .notification-message {
        font-size: 12px;
    }
}

/* Toast Notification System */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    pointer-events: none;
}

/* 對手斷線 Toast 容器 - 與聊天訊息位置一致 */
.toast-container.chat-position {
    top: 80px;
    right: 20px;
}

/* 積分變化 Toast 樣式 */
.toast-rating-gain {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    border-left: 4px solid #dc2626;
    box-shadow: 0 8px 25px rgba(220, 38, 38, 0.15);
}

.toast-rating-loss {
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    border-left: 4px solid #16a34a;
    box-shadow: 0 8px 25px rgba(22, 163, 74, 0.15);
}

/* 積分變化箭頭圖標 - 風格 4: 雙層箭頭 */
.rating-arrow-up,
.rating-arrow-down {
    width: 24px;
    height: 24px;
    position: relative;
}

.rating-arrow-up::before,
.rating-arrow-up::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-bottom: 12px solid #dc2626;
}

.rating-arrow-up::before {
    top: 20%;
}

.rating-arrow-up::after {
    top: 50%;
    opacity: 0.6;
}

.rating-arrow-down::before,
.rating-arrow-down::after {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 12px solid #16a34a;
}

.rating-arrow-down::before {
    bottom: 20%;
}

.rating-arrow-down::after {
    bottom: 50%;
    opacity: 0.6;
}

/* 等級升級 Toast 特殊樣式 */
.toast-rank-upgrade {
    min-width: 350px;
    padding: 16px;
    background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 100%);
    border-left: 4px solid #10b981;
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.15);
}

.toast-rank-icon {
    width: 48px;
    height: 48px;
    margin-right: 12px;
    flex-shrink: 0;
}

.toast-rank-icon .rank-badge-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #10b981;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.toast {
    display: flex;
    align-items: center;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    margin-bottom: 10px;
    padding: 12px 16px;
    min-width: 300px;
    max-width: 400px;
    pointer-events: auto;
    transform: translateX(400px);
    transition: all 0.3s ease-in-out;
    border-left: 4px solid #ccc;
}

.toast.show {
    transform: translateX(0);
}

.toast.hide {
    transform: translateX(400px);
    opacity: 0;
}

.toast-success {
    border-left-color: #10b981;
    background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 100%);
}

.toast-error {
    border-left-color: #ef4444;
    background: linear-gradient(135deg, #fef2f2 0%, #fef2f2 100%);
}

.toast-warning {
    border-left-color: #f59e0b;
    background: linear-gradient(135deg, #fffbeb 0%, #fefce8 100%);
}

.toast-info {
    border-left-color: #3b82f6;
    background: linear-gradient(135deg, #eff6ff 0%, #f0f9ff 100%);
}

.toast-icon {
    width: 20px;
    height: 20px;
    margin-right: 12px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
    color: white;
}

.toast-success .toast-icon {
    background: #10b981;
}

.toast-error .toast-icon {
    background: #ef4444;
}

.toast-warning .toast-icon {
    background: #f59e0b;
}

.toast-info .toast-icon {
    background: #3b82f6;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    margin-bottom: 4px;
    color: #1f2937;
    font-size: 14px;
}

.toast-message {
    color: #6b7280;
    font-size: 13px;
    line-height: 1.4;
}

.toast-close {
    margin-left: 12px;
    background: none;
    border: none;
    font-size: 18px;
    color: #9ca3af;
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s;
}

.toast-close:hover {
    background: rgba(0, 0, 0, 0.1);
    color: #374151;
}

/* Toast animations */
@keyframes toastSlideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes toastSlideOut {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(400px);
        opacity: 0;
    }
}

/* Mobile responsive for toasts */
@media (max-width: 768px) {
    .toast-container {
        top: 10px;
        right: 10px;
        left: 10px;
    }
    
    .toast {
        min-width: auto;
        max-width: none;
        transform: translateY(-100px);
    }
    
    .toast.show {
        transform: translateY(0);
    }
    
    .toast.hide {
        transform: translateY(-100px);
        opacity: 0;
    }
}

/* 最新棋子標記 - 方案 1: 經典紅白 */

/* 黑子上的白色標記 */

/* 白子上的紅色標記 */

/* 桌機版和大平板最新棋子標記 */

/* 手機版最新棋子標記 */

/* ============================================================
   Settings gear popover (game pages)
   ------------------------------------------------------------
   These styles normally live in game-mode-switcher.css, which the
   Xiangqi pages don't load, so the difficulty panel was rendering
   inline inside the game header (taking ~80px of vertical space).
   Define the popover here so it behaves as a proper dropdown.
   ============================================================ */
.settings-gear-container {
    position: relative;
    /* On phones the game-header is full-bleed (.container padding collapses to
       0), so the gear would otherwise sit flush against the screen edge — hard
       to tap. Keep it clear of the edge and of notches / rounded corners. */
    margin-right: max(10px, env(safe-area-inset-right));
}
/* Settings gear button (Xiangqi game pages). These pages do NOT load
   game-mode-switcher.css, so without this the button had no size rule and
   collapsed to the bare ~17px icon. Size it as a proper touch target:
   44x44px on every viewport per Apple HIG / WCAG 2.5.5 (Material ~48dp),
   because fingers are far less precise than a mouse. */
.settings-gear-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    background: linear-gradient(135deg, #ffffff 0%, #f7f7f7 100%);
    border: 2px solid #d1d5db;
    border-radius: 10px;
    color: #4b5563;
    cursor: pointer;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    -webkit-tap-highlight-color: transparent;
}
.settings-gear-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}
.settings-gear-btn:focus-visible {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.3);
}
.settings-gear-btn i {
    font-size: 1.1rem;
    line-height: 1;
}
.settings-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 210px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 8px 26px rgba(0, 0, 0, 0.16);
    padding: 14px;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
}
.settings-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.settings-dropdown-header {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--gray-color);
    margin-bottom: 10px;
}
.settings-dropdown label {
    display: block;
    font-size: 0.85rem;
    color: var(--dark-color);
    margin-bottom: 6px;
}
.settings-dropdown select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: #fff;
    font-size: 0.9rem;
}
.settings-dropdown .mute-setting {
    padding-top: 12px;
    margin-top: 12px;
    border-top: 1px solid var(--border-color);
}
/* First item after the header should not carry the divider */
.settings-dropdown .settings-dropdown-header + .mute-setting {
    padding-top: 0;
    margin-top: 0;
    border-top: none;
}
.settings-dropdown .checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--dark-color);
    margin-bottom: 0;
}
.settings-dropdown .checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary-color);
}
.settings-dropdown .checkbox-text { flex-shrink: 0; }

/* ============================================================
   Desktop left-sidebar app shell  (>= 1280px)
   ------------------------------------------------------------
   The same shared <header> markup that every page uses is
   restyled from a top bar into a fixed left navigation rail.
   Goal: free up vertical space so the game board can fit the
   viewport height. Below 1280px (phones + tablets, incl. iPad
   Pro portrait) the original top-bar + hamburger layout is
   left completely untouched.
   ============================================================ */
@media (min-width: 1280px) {
    :root {
        --sb-w: 240px;
    }

    /* Offset all page content (main + footer) to the right of the rail.
       Scoped to pages that actually have the shared <header> sidebar so
       standalone pages (e.g. admin) are left untouched. */
    body:has(> header) {
        padding-left: var(--sb-w);
    }

    /* Header -> fixed full-height left rail */
    body > header {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: var(--sb-w);
        background-color: #fff;
        box-shadow: 2px 0 16px rgba(0, 0, 0, 0.08);
        border-right: 1px solid var(--border-color);
        z-index: 1000;
        overflow-y: auto;
        overflow-x: hidden;
    }

    body > header .container {
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        max-width: none;
        width: 100%;
        height: 100%;
        min-height: 100vh;
        padding: 26px 16px 20px;
        gap: 6px;
    }

    /* Brand at the top of the rail */
    body > header .logo {
        padding: 4px 10px 16px;
        margin-bottom: 4px;
        border-bottom: 1px solid var(--border-color);
    }
    body > header .logo h1 {
        font-size: 21px;
        line-height: 1.25;
        word-break: break-word;
    }

    /* Vertical nav fills the middle and pushes auth to the bottom */
    body > header nav {
        width: 100%;
        flex: 1 1 auto;
        margin-top: 10px;
    }
    body > header nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
    }
    body > header nav ul li {
        margin: 0;
        width: 100%;
    }
    body > header nav ul li a {
        width: 100%;
        padding: 11px 14px;
        border-radius: 9px;
        font-size: 15px;
        font-weight: 500;
        color: var(--secondary-color);
        line-height: 1.4;
        transition: background-color 0.18s ease, color 0.18s ease;
    }
    body > header nav ul li a:hover {
        background-color: rgba(52, 152, 219, 0.10);
        color: var(--primary-color);
    }
    body > header nav ul li a.active {
        background-color: rgba(52, 152, 219, 0.14);
        color: var(--primary-color);
        font-weight: 600;
    }

    /* Auth controls pinned to the bottom of the rail */
    body > header .auth-buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
        width: 100%;
        margin-top: auto;
        padding-top: 16px;
        border-top: 1px solid var(--border-color);
    }
    body > header .auth-buttons .login-btn,
    body > header .auth-buttons .signup-btn,
    body > header .auth-buttons > button {
        width: 100%;
        max-width: none;
        justify-content: center;
    }
    /* ------------------------------------------------------------
       Logged-in user menu in the rail (Discord-style).
       auth.js was written for a top header (menu drops DOWN below
       the avatar); in the sidebar the chip sits at the bottom, so
       the menu must open UPWARD and span the rail's inner width.
       Some auth.js rules use !important, hence !important here too.
       ------------------------------------------------------------ */
    body > header .auth-buttons .user-profile-dropdown {
        width: 100%;
        position: relative;
    }

    /* Full-width clickable chip with a rounded hover, like nav items */
    body > header .auth-buttons .user-profile-dropdown .profile-btn {
        width: 100% !important;
        padding: 9px 10px !important;
        border-radius: 10px !important;
        gap: 10px !important;
    }
    body > header .auth-buttons .user-profile-dropdown .profile-btn:hover {
        background-color: rgba(52, 152, 219, 0.10) !important;
        opacity: 1 !important;
    }
    body > header .auth-buttons .user-profile-dropdown .profile-btn .profile-name {
        flex: 1 1 auto;
        text-align: left;
        max-width: none !important;
    }
    /* The menu opens upward, so the chevron points up */
    body > header .auth-buttons .user-profile-dropdown .profile-btn .fa-chevron-down {
        transform: rotate(180deg);
    }

    /* Pop the menu up above the chip, clamped to the rail width
       (keeps it inside the header's overflow scroll container) */
    body > header .auth-buttons .profile-dropdown-content {
        top: auto;
        bottom: calc(100% + 10px);
        left: 0;
        right: 0;
        min-width: 0;
        max-width: none;
        margin-top: 0;
        border-radius: 12px;
        box-shadow: 0 10px 34px rgba(0, 0, 0, 0.18);
    }

    /* No hamburger on desktop */
    body > header .menu-toggle {
        display: none !important;
    }

    /* Reclaim the vertical space the old top header used to take */
    body:has(> header) main {
        min-height: calc(100vh - 260px);
        padding: 28px 0;
    }
}

/* ============================================================
   Home page redesign — hero, features, leaderboard/about duo
   ------------------------------------------------------------
   Built for the desktop left-sidebar layout; fully responsive.
   ============================================================ */

/* ---------- Hero ---------- */
.home-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    align-items: center;
    gap: 48px;
    padding: 16px 0 8px;
    margin-bottom: 48px;
}

.home-hero-media img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 24px 60px rgba(44, 62, 80, 0.18);
}

.home-hero-body h2 {
    font-size: clamp(32px, 3.4vw, 46px);
    line-height: 1.12;
    font-weight: 800;
    color: var(--secondary-color);
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}

.home-hero-tagline {
    font-size: 17px;
    line-height: 1.65;
    color: var(--gray-color);
    margin-bottom: 28px;
    max-width: 48ch;
}

/* Big chess.com-style CTA buttons */
.home-cta-group {
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-width: 430px;
    margin-bottom: 26px;
}

.home-cta {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 15px 20px;
    border-radius: 12px;
    color: #fff;
    transition: var(--transition);
    box-shadow: 0 6px 18px rgba(44, 62, 80, 0.18);
}

.home-cta:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(44, 62, 80, 0.26);
}

.home-cta > i:first-child {
    font-size: 24px;
    width: 34px;
    text-align: center;
    flex-shrink: 0;
}

.home-cta-text {
    display: flex;
    flex-direction: column;
    line-height: 1.35;
    flex: 1 1 auto;
    min-width: 0;
}

.home-cta-text strong {
    font-size: 18px;
    font-weight: 700;
    white-space: nowrap;
}

.home-cta-text small {
    font-size: 13px;
    font-weight: 400;
    opacity: 0.85;
}

.home-cta-arrow {
    font-size: 14px;
    opacity: 0.7;
    transition: var(--transition);
}

.home-cta:hover .home-cta-arrow {
    transform: translateX(4px);
    opacity: 1;
}

.home-cta-primary {
    background: linear-gradient(135deg, #3da4ec, #2980b9);
}

.home-cta-secondary {
    background: linear-gradient(135deg, #3d566e, #2c3e50);
}

/* Live stats strip */
.home-live-stats {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 14px;
    font-size: 14px;
    color: var(--gray-color);
}

.home-live-stats .live-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--success-color);
    animation: pulse-live 2s ease-in-out infinite;
    flex-shrink: 0;
}

.home-stat b {
    color: var(--secondary-color);
    font-size: 16px;
    font-weight: 700;
    margin-right: 2px;
}

.home-stat-sep {
    width: 1px;
    height: 14px;
    background: var(--border-color);
}

/* ---------- Feature cards ---------- */
.home-features {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    margin-bottom: 48px;
}

.home-feature {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid transparent;
    border-radius: 14px;
    padding: 26px;
    color: inherit;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.home-feature:hover {
    color: inherit;
    transform: translateY(-4px);
    border-color: rgba(52, 152, 219, 0.35);
    box-shadow: 0 10px 28px rgba(44, 62, 80, 0.14);
}

.home-feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    border-radius: 12px;
    font-size: 21px;
    color: #fff;
    margin-bottom: 16px;
}

.home-feature-icon.hf-blue  { background: linear-gradient(135deg, #3da4ec, #2980b9); }
.home-feature-icon.hf-green { background: linear-gradient(135deg, #2ecc71, #27ae60); }
.home-feature-icon.hf-gold  { background: linear-gradient(135deg, #f1c40f, #e67e22); }

.home-feature h3 {
    font-size: 19px;
    color: var(--secondary-color);
    margin-bottom: 8px;
}

.home-feature p {
    color: var(--gray-color);
    font-size: 14.5px;
    line-height: 1.6;
    flex: 1 1 auto;
    margin-bottom: 16px;
}

.home-feature-more {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
}

.home-feature-more i {
    font-size: 12px;
    margin-left: 4px;
    transition: var(--transition);
}

.home-feature:hover .home-feature-more i {
    transform: translateX(4px);
}

/* ---------- Leaderboard + About duo ---------- */
.home-duo {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    gap: 20px;
    align-items: stretch;
}

.home-panel {
    display: flex;
    flex-direction: column;
    background: #fff;
    border-radius: 14px;
    padding: 28px;
    box-shadow: var(--shadow);
}

.home-panel > h2 {
    font-size: 21px;
    color: var(--secondary-color);
    margin-bottom: 18px;
}

.home-panel > h2 i {
    color: var(--primary-color);
    font-size: 18px;
    margin-right: 8px;
}

.home-leaderboard .leaderboard-table {
    flex: 1 1 auto;
    margin-bottom: 20px;
}

/* ---------- Homepage "Top Players" rows: keep avatar + name aligned ---------- */
/* The global `.player`/`.player-info` rules are tuned for the in-game player
   panel; here we scope a clean layout so the avatar, name and rating sit on a
   single, vertically-centered row (no upward-shifted avatar, no wrapping). */
.home-leaderboard .leaderboard-row .player {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.home-leaderboard .leaderboard-row .player-avatar {
    width: 40px;
    height: 40px;
    flex: 0 0 40px;       /* never shrink or distort */
    border-radius: 50%;
    object-fit: cover;     /* crop instead of stretch */
    background-color: var(--light-color);
}

.home-leaderboard .leaderboard-row .player-info {
    display: flex;
    flex-direction: column;   /* stack name over @username */
    align-items: flex-start;
    justify-content: center;
    gap: 2px;
    /* Grow into ALL the space left in the Player track (after the avatar), so a
       longer display name has the full available width before it ellipsises.
       Without `flex: 1`, the column was content-sized and collapsed to ~55px,
       truncating CJK names like 象棋的王將 to "象棋…" while leaving a big empty
       gap before the Rating column. `min-width: 0` is what actually permits the
       ellipsis inside a flex item. Rating lives in its own fixed grid track, so
       this can never push it or cause wrapping. */
    flex: 1 1 0;
    min-width: 0;             /* allow ellipsis */
    line-height: 1.3;
    padding: 0;               /* cancel the generic `.leaderboard-row div` padding */
}

.home-leaderboard .leaderboard-row .player-name,
.home-leaderboard .leaderboard-row .player-username {
    display: block;
    max-width: 100%;
    margin: 0;
    padding: 0;               /* cancel the generic `.leaderboard-row div` padding */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.home-leaderboard .leaderboard-row .player-username {
    font-size: 13px;
    color: var(--gray-color);
}

/* Center the rank icon/number and rating with the avatar row. */
.home-leaderboard .leaderboard-row .rank,
.home-leaderboard .leaderboard-row .rating {
    display: flex;
    align-items: center;
    justify-content: center;
}

.home-panel .btn {
    align-self: center;
    min-width: 220px;
    margin-top: auto;
}

.home-about-panel p {
    color: var(--gray-color);
    font-size: 15px;
    line-height: 1.75;
    margin-bottom: 14px;
}

.home-about-panel p:last-of-type {
    margin-bottom: 22px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1440px) {
    .home-hero { gap: 32px; }
}

@media (max-width: 1279px) {
    .home-hero {
        grid-template-columns: minmax(0, 1fr);
        gap: 28px;
        padding-top: 4px;
        margin-bottom: 36px;
        text-align: center;
    }
    /* Content first, board image below the CTAs */
    .home-hero-media { order: 2; max-width: 640px; margin: 0 auto; width: 100%; }
    .home-hero-body  { order: 1; }
    .home-hero-tagline { margin-left: auto; margin-right: auto; }
    .home-cta-group { margin-left: auto; margin-right: auto; text-align: left; }
    .home-live-stats { justify-content: center; }

    .home-features {
        grid-template-columns: minmax(0, 1fr);
        margin-bottom: 36px;
    }

    .home-duo { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 480px) {
    .home-hero-body h2 { font-size: 30px; }
    .home-hero-tagline { font-size: 15.5px; }
    .home-cta { padding: 14px 16px; gap: 12px; }
    .home-cta-text strong { font-size: 16.5px; }
    .home-cta-text small { font-size: 12px; }
    .home-feature { padding: 22px; }
    .home-panel { padding: 22px 18px; }
    .home-stat-sep { display: none; }
    .home-live-stats { gap: 6px 10px; font-size: 13px; }
}

/* ===== Mobile touch fix (site-wide buttons) — CSS only, no behavior change =====
   Tappable controls respond instantly without triggering double-tap-to-zoom and
   without the grey tap-flash. Viewport is NOT locked, so pinch-zoom still works
   (accessibility preserved). */
button, [role="button"], .btn,
input[type="button"], input[type="submit"], input[type="reset"],
select, summary {
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}