/* ==================== CSS Variables / Design Tokens ==================== */
:root {
    /* 背景色 (Backgrounds) */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2128;
    --bg-surface: #21262d;

    /* 边框 (Borders) */
    --border-primary: #30363d;
    --border-subtle: #21262d;

    /* 文字 (Text) */
    --text-primary: #e6edf3;
    --text-secondary: #7d8590;
    --text-tertiary: #484f58;

    /* 买盘 / 多头流动性 (Bid / Long Liquidity) */
    --bid-primary: #3fb950;
    --bid-cyan: #26c6da;
    --bid-bg: rgba(63, 185, 80, 0.12);
    --bid-glow: rgba(38, 198, 218, 0.4);

    /* 卖盘 / 空头流动性 (Ask / Short Liquidity) */
    --ask-primary: #f85149;
    --ask-orange: #ff9800;
    --ask-bg: rgba(248, 81, 73, 0.12);
    --ask-glow: rgba(248, 81, 73, 0.4);

    /* 强调色 (Accent) */
    --accent: #58a6ff;
    --accent-subtle: rgba(88, 166, 255, 0.15);

    /* 警告 (Warning) */
    --warning: #d29922;
    --warning-bg: rgba(210, 153, 34, 0.12);

    /* 尺寸 (Sizing) */
    --header-height: 48px;
    --footer-height: 32px;
    --panel-gap: 4px;
    --panel-radius: 6px;
    --panel-title-height: 32px;

    /* 字体 (Typography) */
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;
}

/* ==================== Reset & Base ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 13px;
    line-height: 1.4;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.mono {
    font-family: var(--font-mono);
    font-feature-settings: 'tnum' 1;
}

.hidden { display: none !important; }

/* ==================== Main Grid Layout ==================== */
body {
    display: grid;
    grid-template-rows: var(--header-height) 1fr var(--footer-height);
    gap: 0;
}

#app-main {
    display: grid;
    grid-template-columns: 78fr 22fr; /* 主图 K线+热力图 78%，侧栏 22% */
    gap: var(--panel-gap);
    padding: var(--panel-gap);
    min-height: 0;
}

.right-panel {
    display: grid;
    grid-template-rows: 45fr 55fr; /* 挂单墙列表 45%，实时变动 55% */
    gap: var(--panel-gap);
    min-height: 0;
}

/* ==================== Panel Base ==================== */
.panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--panel-radius);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.panel-title-bar {
    height: var(--panel-title-height);
    min-height: var(--panel-title-height);
    padding: 0 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-subtle);
    user-select: none;
}

.panel-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.panel-subtitle {
    font-size: 11px;
    color: var(--text-secondary);
    margin-left: 8px;
}

.title-left, .title-right {
    display: flex;
    align-items: center;
}

.badge-live {
    font-size: 10px;
    font-weight: 600;
    color: var(--bid-primary);
    background: var(--bid-bg);
    padding: 2px 8px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
}

/* ==================== Header ==================== */
#app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    z-index: 10;
}

.header-left, .header-center, .header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-right: 4px;
}

.logo-icon {
    font-size: 18px;
}

.logo-text {
    font-weight: 700;
    font-size: 14px;
    letter-spacing: -0.3px;
    background: linear-gradient(135deg, #ff9800 0%, #26c6da 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Symbol Selector */
.symbol-selector {
    position: relative;
}

.symbol-input-wrap {
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: 6px;
    padding: 2px 6px 2px 2px;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
}

.symbol-input-wrap:hover {
    border-color: var(--text-secondary);
    background: var(--bg-surface);
}

.symbol-input-wrap:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-subtle);
    background: var(--bg-tertiary);
}

.symbol-input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    padding: 3px 6px;
    width: 110px;
    outline: none;
    cursor: text;
}

.btn-fav-star {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 14px;
    line-height: 1;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 4px;
    transition: all 0.15s ease;
    user-select: none;
}

.btn-fav-star:hover {
    color: #ffd700;
    transform: scale(1.15);
}

.btn-fav-star.favorited {
    color: #ffd700;
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.6);
}

.dropdown-arrow {
    color: var(--text-secondary);
    font-size: 10px;
    padding: 0 2px;
    cursor: pointer;
    user-select: none;
    transition: transform 0.2s ease, color 0.15s ease;
}

.symbol-input-wrap:hover .dropdown-arrow {
    color: var(--text-primary);
}

/* Symbol Dropdown */
.symbol-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    width: 250px;
    max-height: 340px;
    overflow-y: auto;
    background: rgba(22, 27, 34, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-primary);
    border-radius: 8px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.04);
    z-index: 120;
    padding: 4px 0;
}

.dropdown-section-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px 4px 10px;
    font-size: 10px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    background: rgba(0, 0, 0, 0.2);
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}

.dropdown-section-title:first-child {
    border-top: none;
}

.dropdown-section-title .count {
    background: var(--bg-surface);
    color: var(--text-tertiary);
    padding: 1px 5px;
    border-radius: 8px;
    font-size: 9px;
}

.dropdown-empty-fav {
    padding: 10px;
    font-size: 11px;
    color: var(--text-tertiary);
    text-align: center;
}

.symbol-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 10px;
    cursor: pointer;
    transition: background 0.12s ease;
}

.symbol-item:hover {
    background: var(--bg-surface);
}

.symbol-item.active {
    background: rgba(88, 166, 255, 0.12);
}

.symbol-item.active .symbol-name {
    color: var(--accent);
}

.symbol-item-left {
    display: flex;
    align-items: center;
    gap: 6px;
}

.symbol-name {
    font-weight: 700;
    font-size: 12px;
    color: var(--text-primary);
}

.symbol-badge {
    font-size: 9px;
    color: var(--text-tertiary);
}

/* Item Favorite Star Button (in dropdown and top 100 list) */
.item-fav-btn {
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 3px;
    transition: all 0.15s ease;
    user-select: none;
}

.item-fav-btn:hover {
    color: #ffd700;
    transform: scale(1.2);
}

.item-fav-btn.favorited {
    color: #ffd700;
    text-shadow: 0 0 6px rgba(255, 215, 0, 0.5);
}

/* Interval Selector */
.interval-selector {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: 4px;
    border: 1px solid var(--border-primary);
    overflow: hidden;
}

.interval-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    padding: 4px 9px;
    cursor: pointer;
    transition: all 0.1s ease;
}

.interval-btn:hover {
    color: var(--text-primary);
    background: var(--bg-surface);
}

.interval-btn.active {
    color: var(--text-primary);
    background: var(--accent);
    font-weight: 600;
}

/* Heatmap Toggles */
.heatmap-toggles {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-tertiary);
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-primary);
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.toggle-label input {
    cursor: pointer;
    accent-color: var(--accent);
}

.toggle-label:hover {
    color: var(--text-primary);
}

/* Opacity Slider Control */
.opacity-control {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-tertiary);
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-primary);
}

.opacity-control .control-label {
    font-size: 11px;
    color: var(--text-secondary);
    user-select: none;
}

.opacity-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 60px;
    height: 4px;
    border-radius: 2px;
    background: var(--bg-surface);
    outline: none;
    cursor: pointer;
}

.opacity-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 4px rgba(88, 166, 255, 0.5);
    transition: transform 0.1s ease;
}

.opacity-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.opacity-val {
    font-size: 10px;
    color: var(--text-primary);
    min-width: 26px;
    text-align: right;
}

/* Pine Params Control */
.pine-params-control {
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--bg-tertiary);
    padding: 3px 8px;
    border-radius: 4px;
    border: 1px solid var(--border-primary);
}

.pine-params-control .control-label {
    font-size: 11px;
    color: var(--text-secondary);
    user-select: none;
}

.pine-params-control .control-unit {
    font-size: 10px;
    color: var(--text-tertiary);
}

.param-input {
    background: var(--bg-surface);
    border: 1px solid var(--border-primary);
    border-radius: 3px;
    color: var(--accent);
    font-size: 11px;
    font-weight: 600;
    width: 44px;
    padding: 2px 4px;
    text-align: center;
    outline: none;
}

.param-input:focus {
    border-color: var(--accent);
}

/* Header Right Metrics */
.bid-ask-ratio {
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.ratio-bar-container {
    width: 60px;
    height: 6px;
    background: var(--bg-surface);
    border-radius: 3px;
    overflow: hidden;
    display: flex;
}

.ratio-fill { height: 100%; transition: width 0.2s ease; }
.bid-fill { background: var(--bid-cyan); }
.ask-fill { background: var(--ask-primary); }

.ratio-text {
    font-size: 11px;
    color: var(--text-primary);
    min-width: 80px;
}

.price-info {
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.current-price {
    font-size: 16px;
    font-weight: 700;
    letter-spacing: -0.3px;
    transition: color 0.15s ease;
}

.price-up { color: var(--bid-primary); }
.price-down { color: var(--ask-primary); }

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

/* ==================== Chart Wrapper (KLine + Heatmap Canvas) ==================== */
.chart-panel {
    flex: 1;
    position: relative;
}

.chart-wrapper {
    position: relative;
    width: 100%;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* 底层 K 线图层 */
.kline-chart-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* 顶层透明热力图 Overlay Canvas */
.heatmap-overlay-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none; /* 让鼠标手势能够穿透到 K 线图拖拽缩放 */
}

/* 热力图悬浮卡片 */
.heatmap-tooltip {
    position: absolute;
    z-index: 10;
    pointer-events: none;
    background: rgba(22, 27, 34, 0.95);
    border: 1px solid var(--border-primary);
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 11px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    transition: opacity 0.1s ease;
}

/* ==================== Right Panel: Walls List ==================== */
.walls-panel {
    flex: 1;
    min-height: 0;
}

.walls-list {
    flex: 1;
    overflow-y: auto;
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.wall-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 8px;
    border-radius: 4px;
    background: var(--bg-tertiary);
    border-left: 3px solid transparent;
    font-size: 11px;
    transition: all 0.15s ease;
    cursor: default;
}

.wall-card.bid {
    border-left-color: var(--bid-cyan);
}

.wall-card.ask {
    border-left-color: var(--ask-primary);
}

/* 主力大单墙专属高光样式 (Whale Distinction) */
.wall-card.whale-bid {
    border-left-color: #ffb700;
    background: rgba(255, 183, 0, 0.08);
}
.wall-card.whale-bid .wall-bar-fill {
    background: #ffb700;
}

.wall-card.whale-ask {
    border-left-color: #e040fb;
    background: rgba(224, 64, 251, 0.08);
}
.wall-card.whale-ask .wall-bar-fill {
    background: #e040fb;
}

.wall-card:hover {
    background: var(--bg-surface);
}

.wall-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.wall-price-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.wall-price {
    font-weight: 700;
}

.wall-dist {
    font-size: 10px;
    color: var(--text-secondary);
}

.wall-qty-row {
    font-size: 10px;
    color: var(--text-secondary);
}

.wall-bar-container {
    width: 50px;
    height: 4px;
    background: var(--bg-surface);
    border-radius: 2px;
    overflow: hidden;
}

.wall-bar-fill {
    height: 100%;
}

.wall-card.bid .wall-bar-fill { background: var(--bid-cyan); }
.wall-card.ask .wall-bar-fill { background: var(--ask-primary); }

.empty-hint {
    color: var(--text-tertiary);
    text-align: center;
    padding: 24px 0;
    font-size: 11px;
}

/* ==================== Right Panel: Changes Log ==================== */
.changes-panel {
    flex: 1;
    min-height: 0;
}

.changes-log {
    flex: 1;
    overflow-y: auto;
    padding: 2px 0;
}

.change-item {
    padding: 3px 8px;
    display: flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: 10px;
    animation: fadeIn 0.25s ease;
    border-bottom: 1px solid rgba(255, 255, 255, 0.02);
}

.change-item:hover {
    background: var(--bg-tertiary);
}

.change-item .change-time {
    color: var(--text-tertiary);
    min-width: 50px;
}

.change-item .change-side {
    font-weight: 600;
    padding: 1px 3px;
    border-radius: 2px;
}

.change-item .change-side.bid {
    color: var(--bid-primary);
    background: var(--bid-bg);
}

.change-item .change-side.ask {
    color: var(--ask-primary);
    background: var(--ask-bg);
}

.change-item .change-dir.up { color: var(--bid-primary); }
.change-item .change-dir.down { color: var(--ask-primary); }

.change-item .change-price {
    color: var(--text-primary);
    min-width: 60px;
}

.change-item .change-qty {
    color: var(--text-secondary);
    min-width: 45px;
}

.change-item .tag {
    font-size: 9px;
    font-weight: 600;
    padding: 1px 3px;
    border-radius: 2px;
    text-transform: uppercase;
}

.tag.wall {
    color: var(--warning);
    background: var(--warning-bg);
}

.tag.large {
    color: var(--accent);
    background: var(--accent-subtle);
}

.tag.blast {
    color: #ff007f;
    background: rgba(255, 0, 127, 0.16);
    font-weight: 700;
}

/* Icon Button */
.btn-icon {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 11px;
    cursor: pointer;
    padding: 2px 4px;
    border-radius: 3px;
}

.btn-icon:hover {
    color: var(--text-primary);
    background: var(--bg-surface);
}

/* ==================== Footer ==================== */
#app-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    font-size: 11px;
}

.footer-left, .footer-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ws-status.connected { color: var(--bid-primary); }
.ws-status.connecting { color: var(--warning); }
.ws-status.disconnected { color: var(--ask-primary); }

.footer-sep {
    color: var(--border-primary);
}

.footer-tip {
    color: var(--text-secondary);
}

.depth-level {
    color: var(--text-secondary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border-primary);
    border-radius: 2px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ==================== Top 100 Button & Modal / Drawer ==================== */
.btn-top100 {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: linear-gradient(135deg, rgba(255, 183, 0, 0.15) 0%, rgba(224, 64, 251, 0.15) 100%);
    border: 1px solid rgba(255, 183, 0, 0.4);
    color: #ffb700;
    font-family: var(--font-ui);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    white-space: nowrap;
}

.btn-top100:hover {
    background: linear-gradient(135deg, rgba(255, 183, 0, 0.25) 0%, rgba(224, 64, 251, 0.25) 100%);
    border-color: #ffb700;
    box-shadow: 0 0 10px rgba(255, 183, 0, 0.35);
    transform: translateY(-1px);
}

.btn-top100 .icon {
    font-size: 13px;
}

/* Modal Backdrop */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInModal 0.2s ease-out;
}

/* Modal Sheet (Desktop: Centered Card; Mobile: Bottom Sheet) */
.modal-sheet {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: 12px;
    width: 480px;
    max-width: 92vw;
    height: 640px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.05);
    overflow: hidden;
    animation: scaleInModal 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-header {
    padding: 14px 16px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.modal-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-icon {
    font-size: 18px;
}

.modal-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.2px;
}

.btn-close {
    background: var(--bg-surface);
    border: 1px solid var(--border-primary);
    color: var(--text-secondary);
    width: 26px;
    height: 26px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 0.15s ease;
}

.btn-close:hover {
    color: var(--text-primary);
    border-color: var(--text-secondary);
    background: var(--border-primary);
}

.modal-search-row {
    width: 100%;
}

.market-search-input {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 12px;
    padding: 8px 12px;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.market-search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

.modal-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.market-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 12px;
    border-radius: 6px;
    background: var(--bg-tertiary);
    cursor: pointer;
    transition: all 0.15s ease;
    border: 1px solid transparent;
}

.market-item:hover {
    background: var(--bg-surface);
    border-color: var(--border-primary);
    transform: translateX(2px);
}

.market-item.active-item {
    background: rgba(88, 166, 255, 0.12);
    border-color: var(--accent);
}

.market-left {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 130px;
}

.market-rank {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-tertiary);
    width: 28px;
}

.market-item:nth-child(1) .market-rank { color: #ffd700; }
.market-item:nth-child(2) .market-rank { color: #c0c0c0; }
.market-item:nth-child(3) .market-rank { color: #cd7f32; }

.market-name-wrap {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.market-name {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-primary);
}

.market-sub-badge {
    font-size: 9px;
    color: var(--text-tertiary);
}

.market-center {
    flex: 1;
    text-align: right;
    padding-right: 14px;
}

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

.market-right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 3px;
    min-width: 90px;
}

.market-price {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.price-up-badge {
    font-size: 10px;
    font-weight: 600;
    color: var(--bid-primary);
    background: var(--bid-bg);
    padding: 1px 5px;
    border-radius: 3px;
}

.price-down-badge {
    font-size: 10px;
    font-weight: 600;
    color: var(--ask-primary);
    background: var(--ask-bg);
    padding: 1px 5px;
    border-radius: 3px;
}

.market-empty-hint, .market-loading-hint {
    text-align: center;
    color: var(--text-tertiary);
    padding: 40px 16px;
    font-size: 12px;
}

/* ==================== Mobile Bottom Tab Bar ==================== */
.mobile-tab-bar {
    display: none; /* 宽屏下默认隐藏 */
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100vw;
    height: 52px;
    background: rgba(22, 27, 34, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-primary);
    z-index: 100;
    padding-bottom: env(safe-area-inset-bottom, 0px);
    box-sizing: content-box;
}

.mobile-tab-btn {
    flex: 1;
    background: none;
    border: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    color: var(--text-secondary);
    font-family: var(--font-ui);
    cursor: pointer;
    transition: all 0.15s ease;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.mobile-tab-btn .tab-icon {
    font-size: 16px;
    transition: transform 0.15s ease;
}

.mobile-tab-btn .tab-text {
    font-size: 10px;
    font-weight: 500;
}

.mobile-tab-btn.active {
    color: var(--accent);
}

.mobile-tab-btn.active .tab-icon {
    transform: scale(1.15);
}

.mobile-tab-btn.active .tab-text {
    font-weight: 700;
}

/* ==================== Animations ==================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-2px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes scaleInModal {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes slideUpSheet {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

/* ==================== Responsive Media Queries (Mobile & Tablet) ==================== */
@media (max-width: 768px) {
    :root {
        --header-height: auto;
        --footer-height: 28px;
    }

    body {
        /* 移动端增加底部 Tab 栏的高度空间 */
        grid-template-rows: auto 1fr calc(52px + env(safe-area-inset-bottom, 0px));
        height: 100dvh; /* 避免移动端 Safari 100vh 工具栏遮挡问题 */
        overflow: hidden;
    }

    /* 顶部导航栏折叠与横向滚动 */
    #app-header {
        flex-direction: column;
        align-items: stretch;
        padding: 6px 10px;
        gap: 6px;
    }

    .header-left {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        width: 100%;
    }

    .symbol-selector {
        flex: 1;
        min-width: 0;
        position: relative;
    }

    .symbol-input-wrap {
        width: 100%;
    }

    .symbol-input {
        flex: 1;
        width: 100%;
        min-width: 60px;
    }

    .symbol-dropdown {
        width: 100%;
        max-width: calc(100vw - 20px);
    }

    .header-center {
        display: flex;
        align-items: center;
        overflow-x: auto;
        padding-bottom: 2px;
        gap: 8px;
        scrollbar-width: none; /* Firefox */
        -webkit-overflow-scrolling: touch;
    }
    .header-center::-webkit-scrollbar {
        display: none; /* Chrome / Safari */
    }

    .header-right {
        display: flex;
        align-items: center;
        justify-content: space-between;
        border-top: 1px solid var(--border-subtle);
        padding-top: 4px;
        width: 100%;
    }

    .price-info {
        gap: 6px;
    }

    .current-price {
        font-size: 14px;
    }

    /* 移动端主界面：单列布局，由 Tab 决定当前显示哪个视图 */
    #app-main {
        grid-template-columns: 1fr;
        padding: 2px;
        min-height: 0;
        height: 100%;
    }

    /* 隐藏原桌面端 footer，由移动端底栏替代 */
    #app-footer {
        display: none;
    }

    /* 启用移动端底栏 */
    .mobile-tab-bar {
        display: flex;
    }

    /* 移动端视图切换：.active-mobile-view 决定显示 */
    .chart-panel, .right-panel {
        display: none !important;
        height: 100%;
        min-height: 0;
    }

    .chart-panel.active-mobile-view {
        display: flex !important;
    }

    .right-panel.active-mobile-view {
        display: flex !important;
        flex-direction: column;
        grid-template-rows: none;
    }

    /* 在挂单墙或扫盘模式下，单面板充满 */
    .right-panel.show-walls-only #walls-panel {
        display: flex !important;
        flex: 1;
        height: 100%;
    }
    .right-panel.show-walls-only #changes-panel {
        display: none !important;
    }

    .right-panel.show-changes-only #changes-panel {
        display: flex !important;
        flex: 1;
        height: 100%;
    }
    .right-panel.show-changes-only #walls-panel {
        display: none !important;
    }

    /* 移动端弹窗变身 Bottom Sheet */
    .modal-backdrop {
        align-items: flex-end;
    }

    .modal-sheet {
        width: 100vw;
        max-width: 100vw;
        height: 80vh;
        max-height: 85vh;
        border-radius: 16px 16px 0 0;
        border-bottom: none;
        border-left: none;
        border-right: none;
        animation: slideUpSheet 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        padding-bottom: env(safe-area-inset-bottom, 0px);
    }

    /* 抽屉顶部拉手指示条 */
    .modal-header::before {
        content: '';
        display: block;
        width: 36px;
        height: 4px;
        background: var(--border-primary);
        border-radius: 2px;
        margin: -6px auto 4px auto;
    }
}