/* ==========================================================================
   五子棋现代东方美学与毛玻璃设计样式 (Wood & Dark 双主题)
   ========================================================================== */

:root {
    /* 默认木质雅致主题变量 (Wood Theme) */
    --bg-page: #f5ede1;
    --bg-gradient: radial-gradient(circle at 50% 10%, #fff6eb 0%, #eaddce 100%);
    --card-bg: rgba(255, 255, 255, 0.75);
    --card-border: rgba(180, 130, 80, 0.25);
    --text-primary: #3d2b1f;
    --text-secondary: #7a6352;
    --accent-color: #c07a38;
    --accent-hover: #a86224;
    --accent-shadow: rgba(192, 122, 56, 0.25);
    --shadow-main: 0 10px 30px rgba(90, 60, 30, 0.12);
    --active-turn-glow: 0 0 18px rgba(217, 119, 6, 0.5);
    --timer-black: #1f2937;
    --timer-white: #f59e0b;
}

body.theme-dark {
    /* 暗黑雅致主题 (Dark Slate Theme) */
    --bg-page: #0f172a;
    --bg-gradient: radial-gradient(circle at 50% 10%, #1e293b 0%, #0b0f19 100%);
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-hover: #0284c7;
    --accent-shadow: rgba(56, 189, 248, 0.25);
    --shadow-main: 0 10px 30px rgba(0, 0, 0, 0.4);
    --active-turn-glow: 0 0 20px rgba(56, 189, 248, 0.6);
    --timer-black: #38bdf8;
    --timer-white: #f43f5e;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* ==========================================================================
   全局优雅精细滚动条 (消除原生白色刺眼底衬，纯净融入背景)
   ========================================================================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent !important;
}

::-webkit-scrollbar-thumb {
    background: rgba(140, 100, 60, 0.22);
    border-radius: 999px;
    transition: background-color 0.2s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(192, 122, 56, 0.6);
}

body.theme-dark ::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
}

body.theme-dark ::-webkit-scrollbar-thumb:hover {
    background: rgba(56, 189, 248, 0.6);
}

/* W3C / Firefox 标准滚动条 */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(140, 100, 60, 0.25) transparent;
}

body.theme-dark * {
    scrollbar-color: rgba(255, 255, 255, 0.22) transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg-gradient);
    background-color: var(--bg-page);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

/* 顶部导航 Header */
.app-header {
    width: 100%;
    max-width: 1100px;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
}

.brand-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.brand-svg {
    display: block;
    flex-shrink: 0;
}

.brand-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 400;
    margin-left: 4px;
}

/* 对战模式 Tab 栏 */
.mode-nav {
    display: flex;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 4px;
    border-radius: 28px;
    gap: 4px;
}

.mode-tab {
    padding: 7px 18px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 22px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-tab:hover {
    color: var(--text-primary);
}

.mode-tab.active {
    background: var(--accent-color);
    color: #ffffff;
    box-shadow: 0 2px 10px var(--accent-shadow);
}

.header-actions {
    display: flex;
    gap: 10px;
}

.icon-btn {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    transform: translateY(-1px);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* 主内容布局 */
.main-content {
    width: 100%;
    max-width: 1050px;
    margin: 0 auto;
    flex: 1;
    display: flex;
    flex-direction: row;
    gap: 32px;
    padding: 16px 20px 32px;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

/* 棋盘区域 */
.board-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
}

.board-container {
    width: min(88vw, 620px);
    height: min(88vw, 620px);
    position: relative;
    border-radius: 14px;
    box-shadow: var(--shadow-main);
    display: flex;
    align-items: center;
    justify-content: center;
}

#boardCanvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: pointer;
}

/* 侧边信息与控制栏 */
.sidebar-wrapper {
    width: 330px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* 玩家信息状态卡片 */
.status-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(12px);
    border-radius: 14px;
    padding: 16px;
    box-shadow: var(--shadow-main);
}

.players-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.player-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.35);
    border: 1.5px solid transparent;
    border-radius: 10px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.theme-dark .player-box {
    background: rgba(15, 23, 42, 0.4);
}

.player-box.active-turn {
    border-color: var(--accent-color);
    box-shadow: var(--active-turn-glow);
    transform: scale(1.02);
}

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

.piece-badge {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.piece-black {
    background: radial-gradient(circle at 35% 35%, #555, #111);
}

.piece-white {
    background: radial-gradient(circle at 35% 35%, #fff, #dcdcdc);
    border: 1px solid #ccc;
}

.player-name {
    font-size: 15px;
    font-weight: 700;
}

.player-timer {
    font-size: 18px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--accent-color);
}

/* 步时进度条 */
.timer-bar-wrapper {
    height: 4px;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 6px;
    width: 100%;
}

.timer-progress {
    height: 100%;
    width: 100%;
    background: var(--accent-color);
    transition: width 1s linear;
}

/* 对局全局状态 */
.game-state-indicator {
    margin-top: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: var(--text-secondary);
    border-top: 1px dashed var(--card-border);
    padding-top: 10px;
    gap: 6px;
}

#currentTurnStatus {
    font-weight: 700;
    color: var(--text-primary);
}

/* 规则指示标签 */
.rule-tag {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
    background: rgba(192, 122, 56, 0.12);
    color: var(--accent-color);
    border: 1px solid rgba(192, 122, 56, 0.25);
    transition: all 0.2s ease;
    white-space: nowrap;
    cursor: pointer;
}

.rule-tag:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

.rule-forbidden-on {
    background: rgba(220, 38, 38, 0.12);
    color: #dc2626;
    border-color: rgba(220, 38, 38, 0.3);
}

body.theme-dark .rule-forbidden-on {
    color: #f87171;
    border-color: rgba(248, 113, 113, 0.4);
}

.rule-host-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 1px 6px;
    border-radius: 8px;
    background: #fef3c7;
    color: #b45309;
    margin-left: 6px;
}

body.theme-dark .rule-host-badge {
    background: rgba(245, 158, 11, 0.2);
    color: #fbbf24;
}

/* 规则微型申请按钮 */
.rule-req-btn {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 6px;
    border: 1px solid var(--accent-color);
    background: transparent;
    color: var(--accent-color);
    cursor: pointer;
    margin-left: 6px;
    transition: all 0.15s ease;
}

.rule-req-btn:hover {
    background: var(--accent-color);
    color: #ffffff;
}

/* 操作按钮网格 */
.actions-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(12px);
    border-radius: 14px;
    padding: 16px;
    box-shadow: var(--shadow-main);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.action-btn {
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.6);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s ease;
}

body.theme-dark .action-btn {
    background: rgba(15, 23, 42, 0.5);
}

.action-btn:hover {
    background: var(--accent-color);
    color: #ffffff;
    border-color: var(--accent-color);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--accent-shadow);
}

.action-btn.btn-primary {
    grid-column: span 2;
    background: var(--accent-color);
    color: #ffffff;
    border: none;
}

.action-btn.btn-primary:hover {
    background: var(--accent-hover);
}

.action-btn.btn-danger {
    background: #ef4444;
    color: #ffffff;
    border-color: #ef4444;
}

.action-btn.btn-danger:hover {
    background: #dc2626;
    border-color: #dc2626;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.35);
}

.btn-icon {
    flex-shrink: 0;
}

/* AI 与在线配置卡片 */
.config-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(12px);
    border-radius: 14px;
    padding: 16px;
    box-shadow: var(--shadow-main);
}

.card-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.title-with-icon {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.card-title-icon {
    color: var(--accent-color);
    flex-shrink: 0;
}

.form-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-size: 13px;
    color: var(--text-secondary);
}

.form-select, .form-input {
    padding: 6px 10px;
    border-radius: 6px;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.8);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
}

body.theme-dark .form-select, body.theme-dark .form-input {
    background: rgba(15, 23, 42, 0.7);
}

/* 快捷互动短语气泡栏 */
.chat-pills-wrapper {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 10px;
}

.chat-bubble-btn {
    font-size: 12px;
    padding: 5px 11px;
    border-radius: 14px;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.45);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
    font-weight: 500;
}

body.theme-dark .chat-bubble-btn {
    background: rgba(15, 23, 42, 0.4);
}

.chat-bubble-btn:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.9);
}

/* 复盘控制浮条 */
.review-control-bar {
    display: none;
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
    border-radius: 30px;
    padding: 8px 18px;
    align-items: center;
    gap: 10px;
    z-index: 100;
}

.rev-btn {
    padding: 6px 12px;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.6);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s ease;
}

.rev-btn:hover {
    background: var(--accent-color);
    color: #fff;
}

#revStepLabel {
    font-size: 13px;
    font-weight: 700;
    min-width: 80px;
    text-align: center;
}

/* 模态框通用遮罩与弹窗 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.modal-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.modal-box {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    border-radius: 18px;
    width: min(92vw, 420px);
    padding: 24px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    transform: scale(0.92);
    transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.show .modal-box {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    gap: 12px;
}

.modal-title {
    font-size: 17px;
    font-weight: 700;
    flex: 1;
    min-width: 0;
}

.modal-close-btn {
    width: 38px;
    height: 38px;
    min-width: 38px;
    min-height: 38px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--card-border);
    font-size: 19px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    cursor: pointer;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
    padding: 0;
    flex-shrink: 0;
    margin-left: 8px;
    position: relative;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

body.theme-dark .modal-close-btn {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
}

.modal-close-btn:hover {
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
    border-color: rgba(239, 68, 68, 0.35);
    transform: rotate(90deg) scale(1.08);
}

.modal-close-btn:active {
    transform: scale(0.92);
}

/* 扩展移动端触摸点击热区 (扩大至 48x48px，杜绝误触或点不中) */
.modal-close-btn::before {
    content: '';
    position: absolute;
    top: -5px;
    left: -5px;
    right: -5px;
    bottom: -5px;
}

.modal-close-btn svg {
    pointer-events: none;
}

.modal-body {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 18px;
}

/* 大厅房间规则预设卡片 */
.lobby-rule-config {
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 12px 14px;
    margin-bottom: 14px;
}

body.theme-dark .lobby-rule-config {
    background: rgba(0, 0, 0, 0.25);
}

.room-rules-summary {
    font-size: 12px;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 8px 12px;
    text-align: center;
    line-height: 1.5;
}

body.theme-dark .room-rules-summary {
    background: rgba(0, 0, 0, 0.2);
}

.room-rules-summary b {
    color: var(--text-primary);
    margin: 0 3px;
}

/* 联机等待室卡片与动效 */
.waiting-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.waiting-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: rgba(34, 197, 94, 0.12);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 8px;
    color: #16a34a;
}

body.theme-dark .waiting-indicator {
    color: #4ade80;
    background: rgba(34, 197, 94, 0.16);
    border-color: rgba(34, 197, 94, 0.4);
}

.pulse-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #16a34a;
    box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.7);
    animation: pulse 1.8s infinite;
}

body.theme-dark .pulse-dot {
    background: #4ade80;
    box-shadow: 0 0 0 0 rgba(74, 222, 128, 0.7);
}

@keyframes pulse {
    0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(22, 163, 74, 0.7);
    }
    70% {
        transform: scale(1);
        box-shadow: 0 0 0 8px rgba(22, 163, 74, 0);
    }
    100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(22, 163, 74, 0);
    }
}

.room-display-box {
    text-align: center;
    background: rgba(0, 0, 0, 0.04);
    border: 1px dashed var(--card-border);
    padding: 12px;
    border-radius: 10px;
}

body.theme-dark .room-display-box {
    background: rgba(0, 0, 0, 0.25);
}

.room-number {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: 4px;
    color: var(--accent-color);
    margin-top: 4px;
}

.share-box {
    display: flex;
    flex-direction: column;
}

.connecting-spinner {
    width: 36px;
    height: 36px;
    margin: 0 auto;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

body.theme-dark .connecting-spinner {
    border-color: rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-color);
}

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

/* 结算弹窗特殊修饰 */
.game-over-modal {
    text-align: center;
}

.victory-icon-wrapper {
    width: 68px;
    height: 68px;
    margin: 0 auto 12px;
    border-radius: 50%;
    background: rgba(192, 122, 56, 0.12);
    border: 1.5px solid var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px var(--accent-shadow);
}

.game-over-stats {
    display: flex;
    justify-content: space-around;
    background: rgba(0, 0, 0, 0.05);
    padding: 12px;
    border-radius: 10px;
    margin: 14px 0;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 18px;
    font-weight: 700;
    color: var(--accent-color);
}

/* 全局 Toast 提示条 */
.global-toast {
    position: fixed;
    top: 24px;
    left: 50%;
    transform: translate(-50%, -80px);
    background: rgba(30, 41, 59, 0.95);
    color: #ffffff;
    padding: 10px 22px;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    z-index: 10000;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: none;
}

.global-toast.show {
    transform: translate(-50%, 0);
}

.global-toast.toast-error {
    background: rgba(220, 38, 38, 0.95);
}

.global-toast.toast-warning {
    background: rgba(217, 119, 6, 0.95);
}

/* 对战实时气泡提示 */
.chat-toast {
    position: fixed;
    right: 28px;
    bottom: 30px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(12px);
    padding: 10px 16px;
    border-radius: 18px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    animation: slideInRight 0.3s ease;
    transition: opacity 0.4s ease;
}

.chat-mine {
    border-left: 4px solid var(--accent-color);
}

.chat-theirs {
    border-left: 4px solid #10b981;
}

.chat-toast.fade-out {
    opacity: 0;
}

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

/* 状态药丸徽标 */
.status-badge {
    display: inline-block;
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.status-waiting {
    background: #fef3c7;
    color: #92400e;
}

.status-connecting {
    background: #e0f2fe;
    color: #0369a1;
}

.status-connected {
    background: #dcfce7;
    color: #15803d;
}

.status-disconnected {
    background: #fee2e2;
    color: #b91c1c;
}

/* 思考指示器 */
.thinking-dots {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    color: var(--accent-color);
}

.thinking-dots span {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: currentColor;
    animation: blink 1.2s infinite ease-in-out both;
}

.thinking-dots span:nth-child(1) { animation-delay: -0.32s; }
.thinking-dots span:nth-child(2) { animation-delay: -0.16s; }

@keyframes blink {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* 响应式适配移动端与平板 */
@media (max-width: 900px) {
    .main-content {
        flex-direction: column;
        align-items: center;
        gap: 18px;
        padding: 12px 14px;
    }

    .sidebar-wrapper {
        width: 100%;
        max-width: min(88vw, 620px);
    }

    .app-header {
        flex-direction: column;
        gap: 12px;
        padding: 12px 16px;
    }

    .brand-title {
        font-size: 20px;
    }
}

/* ============================================================
   在线游戏平台大厅 (Lobby & Platform) 界面样式
   ============================================================ */

.view-container {
    transition: opacity 0.25s ease;
}

.lobby-view {
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
    padding: 24px 24px 48px;
    flex: 1;
    box-sizing: border-box;
}

.game-view {
    max-width: 1440px;
    width: 100%;
    margin: 0 auto;
    padding: 18px 24px 36px;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
}

/* ============================================================
   全屏无边框全局顶部导航栏 (Global Full-width Header)
   ============================================================ */

.app-global-header {
    width: 100%;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--card-bg);
    border-bottom: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.03);
    margin: 0;
    padding: 0;
}

.global-header-inner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    box-sizing: border-box;
}

.header-left-zone {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 0;
}

.header-brand-box {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.brand-text-group {
    display: flex;
    flex-direction: column;
}

.brand-main-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.brand-sub-title {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 1px;
    white-space: nowrap;
}

.lobby-platform-badge {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(192, 122, 56, 0.12);
    color: var(--accent-color);
    border: 1px solid rgba(192, 122, 56, 0.25);
}

.header-center-zone {
    display: flex;
    align-items: center;
    justify-content: center;
}

.lobby-user-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--card-border);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

body.theme-dark .lobby-user-chip {
    background: rgba(255, 255, 255, 0.06);
}

.lobby-user-chip:hover {
    border-color: var(--accent-color);
    background: rgba(192, 122, 56, 0.08);
}

.user-avatar-mini {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: var(--accent-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
}

.header-right-zone {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-lobby-actions,
.header-game-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* 大厅统计与筛选栏 */
.lobby-controls-bar {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(12px);
    border-radius: 14px;
    padding: 14px 18px;
    box-shadow: var(--shadow-main);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 20px;
}

.lobby-filter-tabs {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 0, 0, 0.04);
    padding: 4px;
    border-radius: 10px;
}

body.theme-dark .lobby-filter-tabs {
    background: rgba(255, 255, 255, 0.06);
}

.lobby-filter-tab {
    padding: 6px 14px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.lobby-filter-tab.active {
    background: var(--card-bg);
    color: var(--accent-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.lobby-search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    min-width: 240px;
}

.lobby-search-box .search-icon {
    position: absolute;
    left: 10px;
    color: var(--text-secondary);
    pointer-events: none;
}

.lobby-search-box input {
    width: 100%;
    padding: 8px 12px 8px 32px;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.5);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
}

body.theme-dark .lobby-search-box input {
    background: rgba(15, 23, 42, 0.4);
}

.lobby-search-box input:focus {
    border-color: var(--accent-color);
}

/* 房间卡片网格 */
.lobby-room-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 16px;
}

.room-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(12px);
    border-radius: 14px;
    padding: 16px;
    box-shadow: var(--shadow-main);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.2s ease;
    position: relative;
}

.room-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: rgba(192, 122, 56, 0.35);
}

.room-card.my-room-card {
    border-color: var(--accent-color);
    background: linear-gradient(135deg, var(--card-bg) 0%, rgba(192, 122, 56, 0.05) 100%);
}

.room-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.room-mode-tag {
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 6px;
    letter-spacing: 0.5px;
}

.room-mode-tag.mode-online {
    background: rgba(37, 99, 235, 0.1);
    color: #2563eb;
    border: 1px solid rgba(37, 99, 235, 0.2);
}

body.theme-dark .room-mode-tag.mode-online {
    background: rgba(96, 165, 250, 0.15);
    color: #60a5fa;
    border-color: rgba(96, 165, 250, 0.25);
}

.room-mode-tag.mode-ai {
    background: rgba(147, 51, 234, 0.1);
    color: #9333ea;
    border: 1px solid rgba(147, 51, 234, 0.2);
}

body.theme-dark .room-mode-tag.mode-ai {
    background: rgba(192, 132, 252, 0.15);
    color: #c084fc;
    border-color: rgba(192, 132, 252, 0.25);
}

.room-mode-tag.mode-local {
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

body.theme-dark .room-mode-tag.mode-local {
    background: rgba(52, 211, 153, 0.15);
    color: #34d399;
    border-color: rgba(52, 211, 153, 0.25);
}

.room-status-badge {
    font-size: 12px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.room-status-badge.status-waiting {
    color: #10b981;
}

.room-status-badge.status-playing {
    color: #f59e0b;
}

.room-status-badge.status-finished {
    color: var(--text-secondary);
}

.dot-green {
    background: #10b981;
    box-shadow: 0 0 8px #10b981;
}

.dot-amber {
    background: #f59e0b;
    box-shadow: 0 0 8px #f59e0b;
}

.room-card-body {
    margin-bottom: 14px;
}

.room-host-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.room-avatar-badge {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), #d97706);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
    box-shadow: 0 2px 8px rgba(192, 122, 56, 0.25);
    flex-shrink: 0;
}

.room-host-info {
    flex: 1;
    min-width: 0;
}

.room-host-name {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    gap: 6px;
}

.my-badge {
    font-size: 10px;
    font-weight: 600;
    background: var(--accent-color);
    color: #fff;
    padding: 1px 5px;
    border-radius: 4px;
}

.room-code-tag {
    font-size: 12px;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-family: monospace;
    margin-top: 2px;
}

.btn-copy-room-code {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 2px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-copy-room-code:hover {
    color: var(--accent-color);
}

.room-rules-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.rule-chip {
    font-size: 11px;
    padding: 3px 8px;
    border-radius: 6px;
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

body.theme-dark .rule-chip {
    background: rgba(255, 255, 255, 0.05);
}

.rule-chip.spec-allowed {
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.2);
    color: #059669;
}

body.theme-dark .rule-chip.spec-allowed {
    background: rgba(52, 211, 153, 0.1);
    color: #34d399;
}

.rule-chip.spec-forbidden {
    background: rgba(239, 68, 68, 0.06);
    border-color: rgba(239, 68, 68, 0.18);
    color: #dc2626;
}

body.theme-dark .rule-chip.spec-forbidden {
    background: rgba(248, 113, 113, 0.1);
    color: #f87171;
}

.room-card-footer {
    display: flex;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--card-border);
}

.room-card-btn {
    flex: 1;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--card-border);
    background: rgba(255, 255, 255, 0.6);
    color: var(--text-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s ease;
}

body.theme-dark .room-card-btn {
    background: rgba(15, 23, 42, 0.5);
}

.room-card-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.room-card-btn.btn-primary {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

.room-card-btn.btn-primary:hover {
    background: #a9682e;
    box-shadow: 0 4px 12px rgba(192, 122, 56, 0.3);
}

.room-card-btn.btn-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    border-color: var(--card-border);
    background: rgba(0, 0, 0, 0.04);
}

/* 空房间占位指示 */
.lobby-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
    background: var(--card-bg);
    border: 1px dashed var(--card-border);
    border-radius: 16px;
    margin-top: 20px;
}

.empty-state-title {
    font-size: 16px;
    font-weight: 700;
    margin: 14px 0 6px;
}

.empty-state-desc {
    font-size: 13px;
    color: var(--text-secondary);
    max-width: 320px;
    line-height: 1.5;
    margin-bottom: 18px;
}

/* 模式单选卡片组 (创建房间弹窗内) */
.mode-choice-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 14px;
}

.mode-choice-card {
    border: 1px solid var(--card-border);
    background: rgba(0, 0, 0, 0.02);
    border-radius: 10px;
    padding: 12px 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

body.theme-dark .mode-choice-card {
    background: rgba(255, 255, 255, 0.03);
}

.mode-choice-card:hover {
    border-color: var(--accent-color);
    background: rgba(192, 122, 56, 0.05);
}

.mode-choice-card.selected {
    border-color: var(--accent-color);
    background: rgba(192, 122, 56, 0.1);
    box-shadow: 0 2px 8px rgba(192, 122, 56, 0.15);
}

.mode-choice-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
}

.mode-choice-sub {
    font-size: 11px;
    color: var(--text-secondary);
}

.btn-back-lobby {
    font-size: 13px;
    font-weight: 600;
    padding: 6px 12px;
}

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

.spectator-live-indicator {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
    animation: livePulse 2s infinite ease-in-out;
}

@keyframes livePulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.rotating {
    animation: rotate 0.8s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ============================================================
   全屏风格一致的版权与平台信息页脚 (Global Full-width Footer)
   ============================================================ */

.app-global-footer {
    width: 100%;
    background: var(--card-bg);
    border-top: 1px solid var(--card-border);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    margin-top: auto;
}

.global-footer-inner {
    max-width: 1440px;
    margin: 0 auto;
    padding: 24px 24px 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-sizing: border-box;
}

.footer-top-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-brand-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer-brand-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.footer-copyright-text {
    font-size: 12px;
    color: var(--text-secondary);
}

.footer-author-link {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-author-link:hover {
    color: var(--accent-color);
}

.footer-health-row {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 14px;
    background: rgba(16, 185, 129, 0.06);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: 8px;
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
    margin: 2px 0 0;
}

body.theme-dark .footer-health-row {
    background: rgba(16, 185, 129, 0.08);
    border-color: rgba(16, 185, 129, 0.25);
    color: #94a3b8;
}

.footer-features-badges {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    font-weight: 500;
}

body.theme-dark .footer-badge {
    background: rgba(255, 255, 255, 0.04);
}

.footer-bottom-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--card-border);
    font-size: 12px;
    color: var(--text-secondary);
}

/* 底部行左侧：对弈建议 + 健康忠告（窄屏时健康忠告会被隐藏，只剩建议） */
.footer-bottom-left {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px 18px;
}

/* 对弈设备建议：只在手机端出现（平板/桌面本身就是更大屏，提示无意义且自相矛盾），
   故默认隐藏，由 @media (max-width: 680px) 打开 */
.footer-play-tip {
    display: none;
    align-items: center;
    font-weight: 500;
    white-space: nowrap;
}

.footer-status-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 600;
    color: #10b981;
}

/* 响应式调整 */
@media (max-width: 900px) {
    .global-header-inner {
        padding: 10px 16px;
        flex-wrap: wrap;
    }
    .header-center-zone {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        margin-top: 4px;
    }
    .footer-top-row, .footer-bottom-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}

/* ============================================================
   用户体系、天梯段位、排行榜与个人生涯成就样式
   ============================================================ */

/* 顶栏段位勋章与天梯榜按钮 */
.header-rank-badge {
    font-size: 11px;
    font-weight: 700;
    padding: 2px 7px;
    border-radius: 999px;
    margin-right: 2px;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
}

.header-leaderboard-btn {
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--card-border);
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
    transition: all 0.2s ease;
}

body.theme-dark .header-leaderboard-btn {
    background: rgba(255, 255, 255, 0.06);
}

.header-leaderboard-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: rgba(192, 122, 56, 0.08);
}

/* 个人战绩主页模态框 (Profile Modal) */
.profile-modal-box {
    width: min(94vw, 560px);
    max-height: 88vh;
    overflow-y: auto;
    padding: 24px;
}

.profile-hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    gap: 14px;
}

.profile-hero-left {
    display: flex;
    align-items: center;
    gap: 14px;
}

.profile-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color), #d97706);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    font-weight: 700;
    box-shadow: 0 4px 14px var(--accent-shadow);
    flex-shrink: 0;
}

.profile-user-meta {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.profile-name-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.profile-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.btn-mini-action {
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    display: inline-flex;
    align-items: center;
}

.btn-mini-action:hover {
    color: var(--accent-color);
}

/* 段位天梯卡片 */
.profile-tier-card {
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 14px 16px;
    margin-bottom: 16px;
}

body.theme-dark .profile-tier-card {
    background: rgba(0, 0, 0, 0.25);
}

.tier-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.tier-badge-large {
    font-size: 13px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
}

.tier-elo-points {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.tier-progress-track {
    height: 6px;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 3px;
    overflow: hidden;
    margin: 8px 0 6px;
}

body.theme-dark .tier-progress-track {
    background: rgba(255, 255, 255, 0.1);
}

.tier-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), #10b981);
    transition: width 0.4s ease;
    border-radius: 3px;
}

.tier-progress-text {
    font-size: 11px;
    color: var(--text-secondary);
}

/* 四宫格生涯战绩 */
.career-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}

.career-stat-card {
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 12px 14px;
}

body.theme-dark .career-stat-card {
    background: rgba(0, 0, 0, 0.25);
}

.career-stat-val {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.career-stat-lbl {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* 历史战绩与棋谱复盘列表 */
.profile-matches-box {
    border-top: 1px solid var(--card-border);
    padding-top: 14px;
}

.profile-matches-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.profile-match-list {
    max-height: 240px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-right: 2px;
}

.profile-match-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 12px;
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    gap: 8px;
    font-size: 12px;
}

body.theme-dark .profile-match-item {
    background: rgba(0, 0, 0, 0.2);
}

.match-item-left {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.match-item-mode {
    display: flex;
    align-items: center;
    gap: 6px;
}

.match-item-time {
    color: var(--text-secondary);
    font-size: 11px;
}

.match-item-detail {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.match-item-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.match-elo-delta {
    font-weight: 700;
    font-size: 12px;
    font-variant-numeric: tabular-nums;
}

.match-replay-btn {
    border: 1px solid var(--accent-color);
    background: rgba(192, 122, 56, 0.08);
    color: var(--accent-color);
    border-radius: 6px;
    padding: 3px 8px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 3px;
    transition: all 0.15s ease;
}

.match-replay-btn:hover {
    background: var(--accent-color);
    color: #fff;
}

/* 账号通行证模态框 (Auth Modal) */
.auth-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--card-border);
    margin-bottom: 16px;
}

.auth-tab {
    padding: 8px 16px;
    border: none;
    background: transparent;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

.auth-tab.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.auth-guest-notice {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.25);
    color: #059669;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 12px;
    line-height: 1.5;
    margin-bottom: 14px;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

body.theme-dark .auth-guest-notice {
    color: #34d399;
    background: rgba(16, 185, 129, 0.12);
}

.auth-error-banner {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    margin-bottom: 12px;
    display: none;
}

/* 排行榜模态框 (Leaderboard Modal) */
.leaderboard-modal-box {
    width: min(94vw, 540px);
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    padding: 22px;
}

.leaderboard-tabs {
    display: flex;
    align-items: center;
    gap: 6px;
    background: rgba(0, 0, 0, 0.04);
    padding: 4px;
    border-radius: 10px;
    margin-bottom: 14px;
}

body.theme-dark .leaderboard-tabs {
    background: rgba(255, 255, 255, 0.06);
}

.leaderboard-tab {
    flex: 1;
    padding: 7px 10px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.leaderboard-tab.active {
    background: var(--card-bg);
    color: var(--accent-color);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.leaderboard-scroll {
    overflow-y: auto;
    max-height: 52vh;
    padding-right: 4px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.leaderboard-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.02);
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

body.theme-dark .leaderboard-row {
    background: rgba(0, 0, 0, 0.2);
}

.leaderboard-row:hover {
    background: rgba(0, 0, 0, 0.04);
}

body.theme-dark .leaderboard-row:hover {
    background: rgba(255, 255, 255, 0.04);
}

.leaderboard-row.my-row {
    background: rgba(192, 122, 56, 0.08);
    border-color: rgba(192, 122, 56, 0.35);
}

.row-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.rank-medal {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
    color: #fff;
    flex-shrink: 0;
}

.medal-gold {
    background: linear-gradient(135deg, #f59e0b, #d97706);
    box-shadow: 0 2px 6px rgba(245, 158, 11, 0.4);
}

.medal-silver {
    background: linear-gradient(135deg, #94a3b8, #64748b);
    box-shadow: 0 2px 6px rgba(148, 163, 184, 0.4);
}

.medal-bronze {
    background: linear-gradient(135deg, #d97706, #92400e);
    box-shadow: 0 2px 6px rgba(180, 83, 9, 0.4);
}

.rank-number {
    width: 24px;
    text-align: center;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.row-player-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.row-nickname {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.row-tier-tag {
    font-size: 11px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
}

.row-right {
    text-align: right;
}

.row-metric {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.metric-val {
    font-size: 14px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.metric-sub {
    font-size: 11px;
    color: var(--text-secondary);
}

/* 结算弹窗的天梯积分变化与引导 */
.game-over-elo {
    font-size: 13px;
    color: var(--text-primary);
    margin: 8px auto 4px;
    padding: 6px 14px;
    background: rgba(192, 122, 56, 0.08);
    border-radius: 8px;
    border: 1px solid rgba(192, 122, 56, 0.25);
    display: inline-block;
}

.game-over-guest-prompt {
    font-size: 12px;
    color: var(--accent-color);
    margin-top: 6px;
    cursor: pointer;
    text-decoration: underline;
    transition: opacity 0.2s;
}

.game-over-guest-prompt:hover {
    opacity: 0.8;
}

/* ============================================================
   五子棋对弈与禁手规则指南模态框 (Rules & Renju Guide Modal)
   ============================================================ */
.header-rules-btn {
    background: rgba(0, 0, 0, 0.04);
    border: 1px solid var(--card-border);
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-left: 6px;
    transition: all 0.2s ease;
}

body.theme-dark .header-rules-btn {
    background: rgba(255, 255, 255, 0.06);
}

.header-rules-btn:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
    background: rgba(192, 122, 56, 0.08);
}

/* 棋盘顶部徽标旁帮助图标按钮 */
.rule-badge-container {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.rule-help-icon-btn {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(192, 122, 56, 0.12);
    border: 1px solid rgba(192, 122, 56, 0.3);
    color: var(--accent-color);
    font-size: 12px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    transition: all 0.2s ease;
}

.rule-help-icon-btn:hover {
    background: var(--accent-color);
    color: #fff;
    transform: scale(1.08);
}

/* 弹窗小超链接提示 */
.form-label-with-action {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.form-hint-link {
    background: none;
    border: none;
    padding: 0;
    font-size: 12px;
    color: var(--accent-color);
    cursor: pointer;
    text-decoration: underline;
    transition: opacity 0.2s ease;
}

.form-hint-link:hover {
    opacity: 0.8;
}

/* 指南弹窗主容器 */
.rules-modal-box {
    width: min(95vw, 860px);
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    padding: 24px 28px;
    box-sizing: border-box;
    overflow: hidden;
}

.rules-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 12px;
    margin-top: 6px;
    overflow-x: auto;
    scrollbar-width: none;
}

.rules-tabs::-webkit-scrollbar {
    display: none;
}

.rules-tab {
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s ease;
}

body.theme-dark .rules-tab {
    background: rgba(255, 255, 255, 0.04);
}

.rules-tab:hover {
    color: var(--text-primary);
    background: rgba(192, 122, 56, 0.08);
    border-color: rgba(192, 122, 56, 0.3);
}

.rules-tab.active {
    color: #fff;
    background: var(--accent-color);
    border-color: var(--accent-color);
    box-shadow: 0 2px 8px rgba(192, 122, 56, 0.25);
}

.rules-content-body {
    flex: 1;
    overflow-y: auto;
    padding: 16px 14px 14px 2px;
    margin-top: 4px;
    display: flex;
    flex-direction: column;
    scrollbar-gutter: stable;
}

.rules-content-body::-webkit-scrollbar {
    width: 6px;
}

.rules-content-body::-webkit-scrollbar-track {
    background: transparent !important;
}

.rules-content-body::-webkit-scrollbar-thumb {
    background: rgba(140, 100, 60, 0.22);
    border-radius: 999px;
    transition: background 0.2s ease;
}

.rules-content-body::-webkit-scrollbar-thumb:hover {
    background: rgba(192, 122, 56, 0.65);
}

body.theme-dark .rules-content-body::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
}

body.theme-dark .rules-content-body::-webkit-scrollbar-thumb:hover {
    background: rgba(56, 189, 248, 0.65);
}

.rules-panel {
    display: none;
}

.rules-panel.active {
    display: flex;
    flex-direction: column;
    gap: 18px;
    animation: fadeInRules 0.25s ease-out;
}

@keyframes fadeInRules {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 卡片与结构化说明 */
.rule-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.rule-card-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.rule-card-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 图文并茂禁手图解卡片 */
.forbidden-diagram-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 18px 20px;
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 20px;
    align-items: center;
}

@media (max-width: 680px) {
    .forbidden-diagram-card {
        grid-template-columns: 1fr;
        justify-items: center;
    }
}

.diagram-board-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.diagram-board-svg {
    border-radius: 8px;
    background: #e6ba82;
    border: 2px solid #b88648;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

body.theme-dark .diagram-board-svg {
    background: #2a2520;
    border-color: #4a3e35;
}

.diagram-board-caption {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 600;
}

.diagram-content-wrap {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.rule-tag-danger {
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.25);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.rule-tag-success {
    background: rgba(16, 185, 129, 0.12);
    color: #059669;
    border: 1px solid rgba(16, 185, 129, 0.25);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.rule-highlight-box {
    background: rgba(192, 122, 56, 0.08);
    border-left: 3px solid var(--accent-color);
    padding: 10px 14px;
    border-radius: 0 8px 8px 0;
    font-size: 12px;
    color: var(--text-primary);
    line-height: 1.5;
}

/* 黑白权利对比表格 */
.rules-compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12.5px;
    margin-top: 6px;
}

.rules-compare-table th {
    background: rgba(0, 0, 0, 0.03);
    padding: 10px 12px;
    color: var(--text-secondary);
    font-weight: 600;
    border-bottom: 1px solid var(--card-border);
    text-align: left;
}

body.theme-dark .rules-compare-table th {
    background: rgba(255, 255, 255, 0.04);
}

.rules-compare-table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--card-border);
    color: var(--text-primary);
}

.rules-compare-table tr:last-child td {
    border-bottom: none;
}

/* 决策树思维导图卡片 (Decision Tree Flowchart) */
.decision-flow-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.flow-step-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 14px 16px;
    display: flex;
    gap: 14px;
    align-items: flex-start;
    position: relative;
}

.flow-step-num {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    background: var(--accent-color);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
}

.flow-step-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.flow-step-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.flow-branch-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 4px;
}

.flow-branch-item {
    flex: 1;
    min-width: 200px;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 12px;
    line-height: 1.4;
}

.flow-branch-pass {
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #059669;
}

body.theme-dark .flow-branch-pass {
    color: #10b981;
}

.flow-branch-fail {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #dc2626;
}

body.theme-dark .flow-branch-fail {
    color: #f87171;
}

/* 移动设备模态框触摸与滚动条体验强化 */
@media (max-width: 680px) {
    .modal-close-btn {
        width: 42px;
        height: 42px;
        min-width: 42px;
        min-height: 42px;
        font-size: 22px;
    }

    .modal-header {
        margin-bottom: 12px;
    }

    .rules-modal-box {
        padding: 20px 16px;
    }

    .rules-content-body {
        padding: 14px 8px 10px 0;
    }
}

/* ============================================================
   移动端（≤680px）布局收敛
   —— 全部规则仅作用于手机视口，桌面端（>680px）零影响
   ============================================================ */
@media (max-width: 680px) {

    /* ---------- P0-1 页头瘦身：三行 → 两行（184px → ~110px） ---------- */
    .global-header-inner {
        padding: 8px 12px;
        gap: 8px 10px;
    }

    /* 品牌块去掉副标题与平台徽章，只留图标 + 主标题 */
    .brand-sub-title,
    .lobby-platform-badge {
        display: none;
    }

    .brand-svg {
        width: 26px;
        height: 26px;
    }

    .brand-main-title {
        font-size: 16px;
        line-height: 1.1;
    }

    .header-left-zone {
        gap: 8px;
    }

    .header-right-zone {
        gap: 6px;
    }

    .header-lobby-actions,
    .header-game-actions {
        gap: 6px;
    }

    .header-right-zone .action-btn {
        padding: 7px 9px;
        font-size: 12.5px;
        gap: 4px;
    }

    .header-right-zone .icon-btn {
        width: 34px;
        height: 34px;
    }

    /* 用户身份区压缩：隐藏段位徽章 + 昵称截断 */
    .header-center-zone {
        margin-top: 0;
        gap: 6px;
    }

    .lobby-user-chip {
        padding: 5px 9px;
        gap: 5px;
    }

    .header-rank-badge {
        display: none;
    }

    #lobbyUserNameDisplay {
        max-width: 68px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .header-leaderboard-btn,
    .header-rules-btn {
        padding: 5px 9px;
        font-size: 12px;
        gap: 4px;
        margin-left: 0;
    }

    /* 对局态：中部用户区不是对局必需，收起后品牌可与对局按钮同排（页头 → ~60px） */
    body:has(#viewGame[style*="flex"]) .header-center-zone {
        display: none;
    }

    /* ---------- 页头两排按钮整体居中（品牌行保持左对齐，不动） ---------- */
    /* 右区（刷新 / 快速加入 / 创建房间 / 设置）与中区（用户卡 + 天梯榜 + 玩法说明）
       各自独占一行后，用 width:100% + justify-content:center 把整组按钮居中。
       注意：右区原本靠换行与品牌同行时会显得贴左、右侧留白，这里强制独占一行再居中。 */
    .header-right-zone,
    .header-center-zone {
        width: 100%;
        justify-content: center;
    }

    /* ---------- P0-2 中文标签不再按字断行 ---------- */
    .action-btn,
    .lobby-filter-tab,
    .chat-bubble-btn,
    .rev-btn,
    .room-card-btn,
    .header-leaderboard-btn,
    .header-rules-btn,
    .lobby-user-chip {
        white-space: nowrap;
    }

    /* ---------- P0-5 页脚折叠：279px → ~110px ---------- */
    .footer-features-badges,
    .footer-rules-summary {
        display: none;
    }

    .global-footer-inner {
        padding: 10px 14px;
    }

    .footer-top-row {
        gap: 6px;
    }

    .footer-brand-title {
        font-size: 12.5px;
    }

    .footer-copyright-text {
        font-size: 11.5px;
    }

    /* 底部行排成一行：左「对弈建议」、右「运行状态」
       （健康忠告已在上面隐藏，本行只剩这两项；margin-left:auto 保证万一换行也仍贴右） */
    .footer-bottom-row {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 6px 12px;
    }

    /* 仅手机端显示设备建议（平板/桌面不显示） */
    .footer-play-tip {
        display: inline-flex;
        font-size: 11.5px;
    }

    .footer-status-pill {
        margin-left: auto;
        align-self: center;
    }

    /* ---------- 大厅：收窄内边距，给窄屏争取宽度（修 360px 下筛选标签横溢） ---------- */
    .lobby-view {
        padding: 12px 12px 24px;
    }

    .lobby-controls-bar {
        padding: 10px;
        gap: 8px;
    }

    .lobby-filter-tabs {
        gap: 4px;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
    }

    .lobby-filter-tabs::-webkit-scrollbar {
        display: none;
    }

    /* 触摸目标由 27px 抬到 ~36px；横向滑动兜底，任何窄屏都不会被裁 */
    .lobby-filter-tab {
        padding: 10px 12px;
        font-size: 12px;
        flex-shrink: 0;
    }

    .lobby-room-grid {
        grid-template-columns: minmax(min(320px, 100%), 1fr);
    }

    /* ---------- P0-3 对局页：棋盘优先，整体纵向压缩 ---------- */
    .game-view {
        padding: 6px 10px 12px;
    }

    .main-content {
        gap: 10px;
        padding: 8px 10px;
    }

    /* 棋盘吃满可用宽度（343 → 374），侧栏与之等宽 */
    .board-container {
        width: min(96vw, 620px);
        height: min(96vw, 620px);
    }

    .sidebar-wrapper {
        max-width: min(96vw, 620px);
        gap: 10px;
    }

    /* 玩家卡紧凑化：保留计时进度条但压到 3px */
    .status-card {
        padding: 8px 10px;
    }

    .players-container {
        gap: 8px;
    }

    .player-box {
        padding: 7px 10px;
    }

    .player-name {
        font-size: 12.5px;
    }

    .piece-badge {
        width: 18px;
        height: 18px;
    }

    .timer-bar-wrapper {
        height: 3px;
        margin-top: 3px;
    }

    .player-timer {
        font-size: 14px;
    }

    .game-state-indicator {
        font-size: 12px;
        gap: 6px;
        flex-wrap: nowrap;
    }

    .config-card,
    .actions-card {
        padding: 8px;
    }

    .actions-card {
        gap: 8px;
    }

    .game-state-indicator {
        font-size: 11.5px;
    }

    /* ---------- P1 触摸目标：页头按钮由 29px 抬到 ~35px ---------- */
    .header-right-zone .action-btn {
        padding: 9px 11px;
    }

    .header-leaderboard-btn,
    .header-rules-btn {
        padding: 8px 10px;
    }

    /* ---------- P1 修复：规则弹窗 tab 条在手机上被 flex 压成 22px，文字被裁 ---------- */
    .rules-tabs {
        flex-shrink: 0;
    }
}

/* ============================================================
   手机横屏提示
   —— 横屏下 620px 棋盘塞不进 ~390px 高的视口，直接引导回竖屏。
   判据用「矮视口 + 窄宽度」，桌面浏览器（高度远超 500px）不会命中。
   ============================================================ */
.rotate-hint {
    display: none;
}

@media (orientation: landscape) and (max-height: 500px) and (max-width: 1000px) {
    body {
        overflow: hidden;
    }

    .rotate-hint {
        display: flex;
        position: fixed;
        inset: 0;
        z-index: 9999;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 12px;
        padding: 24px;
        text-align: center;
        background: var(--bg-page);
        color: var(--text-primary);
    }

    .rotate-hint-icon {
        color: var(--accent-color);
        animation: rotateHintNudge 2.2s ease-in-out infinite;
    }

    .rotate-hint-title {
        font-size: 17px;
        font-weight: 700;
    }

    .rotate-hint-desc {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.6;
        max-width: 320px;
    }
}

@keyframes rotateHintNudge {
    0%, 60%, 100% { transform: rotate(0deg); }
    75% { transform: rotate(-90deg); }
}