:root {
    --bg-base: #1e1e2e;
    --bg-surface: #313244;
    --bg-overlay: #45475a;
    --text-primary: #cdd6f4;
    --text-secondary: #a6adc8;
    --text-muted: #6c7086;
    --color-library: #89b4fa;
    --color-optimization: #FA5C5C;
    --color-gameplay: #93BD57;
    --color-decoration: #cba6f7;
    --color-utility: #f9e2af;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
}

@media (prefers-color-scheme: light) {
    :root {
        --bg-base: #f5f5f5;
        --bg-surface: #ffffff;
        --bg-overlay: #ccd0da;
        --text-primary: #4c4f69;
        --text-secondary: #5c5f77;
        --text-muted: #9ca0b0;
        --color-library: #1e66f5;
        --color-optimization: #FA6868;
        --color-gameplay: #6B9440;
        --color-decoration: #8839ef;
        --color-utility: #EEA727;
        --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
        --shadow-md: 0 2px 8px rgba(0,0,0,0.08);
    }
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: var(--bg-base); color: var(--text-primary); }
.layout { display: flex; height: 100vh; }

.sidebar { width: 280px; background: var(--bg-surface); overflow-y: auto; overflow-x: visible; position: fixed; height: 100vh; }
.sidebar-header { padding: 24px; position: sticky; top: 0; background: var(--bg-surface); z-index: 10; backdrop-filter: blur(10px); }
.sidebar-title { color: var(--text-primary); font-size: 18px; font-weight: 700; margin-bottom: 12px; }
.sidebar-search { width: 100%; background: var(--bg-overlay); border: 1px solid transparent; color: var(--text-primary); padding: 10px 14px; border-radius: 10px; font-size: 13px; transition: all 0.2s; }
.sidebar-search:focus { outline: none; border-color: var(--color-library); background: var(--bg-surface); }
.sidebar-list { padding: 0 12px 12px; overflow: visible; }
.sidebar-category { color: var(--text-muted); font-size: 11px; font-weight: 700; padding: 16px 12px 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.sidebar-item { padding: 10px 12px; cursor: pointer; font-size: 13px; position: relative; transition: all 0.2s; border-radius: 0; margin-bottom: 2px; font-weight: 500; border-left: 3px solid transparent; }
.sidebar-item:hover { background: var(--bg-overlay); }
.sidebar-item.library { border-left-color: var(--color-library); }
.sidebar-item.optimization { border-left-color: var(--color-optimization); }
.sidebar-item.gameplay { border-left-color: var(--color-gameplay); }
.sidebar-item.decoration { border-left-color: var(--color-decoration); }
.sidebar-item.utility { border-left-color: var(--color-utility); }

.tooltip { position: absolute; left: 100%; top: 0; margin-left: 12px; background: var(--bg-surface); border: 1px solid var(--bg-overlay); border-radius: 12px; padding: 14px; min-width: 260px; max-width: 360px; z-index: 1000; display: none; box-shadow: var(--shadow-md); }
.sidebar-item:hover .tooltip { display: block; }
.tooltip-floating { position: fixed; display: block; }
.tooltip-name { color: var(--text-primary); font-weight: 700; margin-bottom: 10px; font-size: 14px; }
.tooltip-section { margin-top: 10px; }
.tooltip-label { color: var(--text-muted); font-size: 10px; font-weight: 700; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
.tooltip-tags { display: flex; flex-wrap: wrap; gap: 5px; }
.tooltip-tag { padding: 3px 8px; border-radius: 6px; font-size: 11px; font-weight: 600; }
.tooltip-tag.tooltip-library { background: var(--color-library); color: var(--bg-base); }
.tooltip-tag.tooltip-optimization { background: var(--color-optimization); color: var(--bg-base); }
.tooltip-tag.tooltip-gameplay { background: var(--color-gameplay); color: var(--bg-base); }
.tooltip-tag.tooltip-decoration { background: var(--color-decoration); color: var(--bg-base); }
.tooltip-tag.tooltip-utility { background: var(--color-utility); color: var(--bg-base); }

.main { margin-left: 280px; flex: 1; overflow-y: auto; padding: 28px; }
h1 { color: var(--text-primary); margin-bottom: 6px; font-size: 28px; font-weight: 700; }
.subtitle { color: var(--text-secondary); margin-bottom: 28px; font-size: 14px; }
.stats { display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px; }
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; }
.stat-card { background: var(--bg-surface); padding: 14px 16px; border-radius: 10px; border: 1px solid var(--bg-overlay); transition: all 0.2s; cursor: pointer; }
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--text-muted); }
.stat-card.active { border-color: var(--color-library); background: rgba(137, 180, 250, 0.1); }
.stat-value { font-size: 28px; font-weight: 700; color: var(--text-primary); }
.stat-label { color: var(--text-secondary); margin-top: 4px; font-size: 11px; font-weight: 600; }
.section { padding: 0; margin-bottom: 28px; }
.section-title { color: var(--text-primary); font-size: 18px; font-weight: 700; margin-bottom: 14px; padding-left: 4px; }
.mod-card { background: var(--bg-surface); padding: 18px; border-radius: 12px; margin-bottom: 10px; scroll-margin-top: 20px; transition: all 0.2s; }
.mod-card:hover { box-shadow: var(--shadow-sm); }
.mod-card.library { border: 1px solid var(--color-library); background: rgba(137, 180, 250, 0.05); }
.mod-card.optimization { border: 1px solid var(--color-optimization); background: rgba(250, 92, 92, 0.05); }
.mod-card.gameplay { border: 1px solid var(--color-gameplay); background: rgba(147, 189, 87, 0.05); }
.mod-card.decoration { border: 1px solid var(--color-decoration); background: rgba(203, 166, 247, 0.05); }
.mod-card.utility { border: 1px solid var(--color-utility); background: rgba(249, 226, 175, 0.05); }
.mod-card.disabled { border: 1px solid var(--text-muted); background: rgba(128, 128, 128, 0.05); }
.mod-card.disabled .mod-name { color: var(--text-muted); }
.mod-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.mod-header-right { display: flex; align-items: center; gap: 10px; }
.mod-name { color: var(--text-primary); font-weight: 700; font-size: 15px; }
.mod-file { color: var(--text-muted); font-size: 11px; margin-bottom: 8px; font-family: 'SF Mono', 'Consolas', monospace; }
.mod-desc { color: var(--text-secondary); font-size: 13px; margin-bottom: 8px; line-height: 1.5; }
.mod-version { color: var(--text-muted); font-size: 10px; font-weight: 600; }
.mod-link { display: inline-block; padding: 4px 10px; background: var(--bg-overlay); color: var(--text-primary); text-decoration: none; border-radius: 6px; font-size: 11px; font-weight: 600; transition: all 0.2s; }
.mod-link:hover { background: var(--text-muted); color: var(--bg-base); }
.deps { margin-top: 12px; }
.dep-label { color: var(--text-muted); font-size: 11px; font-weight: 700; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.3px; }
.dep-list { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.dep-tag { padding: 5px 11px; border-radius: 8px; font-size: 12px; font-weight: 600; cursor: pointer; transition: all 0.2s; text-decoration: none; display: inline-block; }
.dep-tag:hover { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.dep-tag.dep-library { background: var(--color-library); color: var(--bg-base); }
.dep-tag.dep-optimization { background: var(--color-optimization); color: var(--bg-base); }
.dep-tag.dep-gameplay { background: var(--color-gameplay); color: var(--bg-base); }
.dep-tag.dep-decoration { background: var(--color-decoration); color: var(--bg-base); }
.dep-tag.dep-utility { background: var(--color-utility); color: var(--bg-base); }
.warning { background: rgba(250, 179, 135, 0.1); border-color: var(--color-optimization); }
.warning::before { background: var(--color-optimization); }

.warning-banner { background: rgba(250, 92, 92, 0.1); border: 1px solid var(--color-optimization); border-radius: 12px; padding: 16px 20px; margin-bottom: 28px; }
.warning-banner-title { color: var(--text-primary); font-weight: 700; font-size: 14px; margin-bottom: 10px; }
.warning-banner-list { display: flex; flex-wrap: wrap; gap: 6px; }

.back-to-top { position: fixed; bottom: 24px; right: 24px; width: 48px; height: 48px; background: var(--bg-surface); border: 1px solid var(--bg-overlay); border-radius: 12px; color: var(--text-primary); font-size: 20px; cursor: pointer; box-shadow: var(--shadow-md); transition: all 0.2s; display: none; z-index: 100; align-items: center; justify-content: center; }
.back-to-top:hover { background: var(--color-library); color: var(--bg-base); transform: translateY(-2px); }
.back-to-top.show { display: flex; }

/* 响应式设计 */
.sidebar-toggle { display: none; }
.sidebar-overlay { display: none; }

@media (max-width: 768px) {
    .sidebar-toggle { display: flex; position: fixed; top: 16px; left: 16px; z-index: 1001; width: 44px; height: 44px; background: var(--bg-surface); border: 1px solid var(--bg-overlay); border-radius: 10px; color: var(--text-primary); font-size: 24px; cursor: pointer; align-items: center; justify-content: center; box-shadow: var(--shadow-md); }
    .sidebar-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.5); z-index: 999; display: none; }
    .sidebar-overlay.show { display: block; }
    .sidebar { transform: translateX(-100%); transition: transform 0.3s ease; z-index: 1000; }
    .sidebar.show { transform: translateX(0); }
    .main { margin-left: 0; padding: 16px; padding-top: 70px; }
    .sidebar-item .tooltip { display: none !important; }
    h1 { font-size: 24px; }
    .stat-value { font-size: 24px; }
    .stats-row { grid-template-columns: repeat(auto-fit, minmax(100px, 1fr)); }
    .back-to-top { bottom: 16px; right: 16px; width: 44px; height: 44px; font-size: 18px; }
}