:root{--bg: #f7f7fb;--panel: #ffffff;--panel-2: #f0f2f8;--text: #0f1220;--muted: #55607a;--accent: #0b4de8;--accent-2: #1f2937;--border: #d7dceb;--error: #dc2626;--success: #16a34a;font-family:Source Han Sans SC,Noto Sans SC,PingFang SC,Microsoft YaHei,sans-serif}:root[data-theme=dark],body[data-theme=dark]{--bg: #0f1322;--panel: #171c2f;--panel-2: #1f2540;--text: #f5f6fb;--muted: #a7b0c5;--accent: #22d3ee;--accent-2: #f97316;--border: #2a3154;--error: #f87171;--success: #34d399}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:var(--bg);color:var(--text)}#app{max-width:1200px;margin:0 auto;padding:32px 20px 80px}.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 0 18px;border-bottom:1px solid var(--border)}.menu-button{width:38px;height:34px;padding:0;display:inline-flex;align-items:center;justify-content:center}.menu-icon{display:grid;gap:4px}.menu-icon 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var(--accent);background:var(--panel)}.notice-title{font-size:12px;letter-spacing:2px;color:var(--muted)}.notice-card p{margin:0;color:var(--text)}.notice-list{margin:0;padding-left:18px;color:var(--text);display:grid;gap:6px;font-size:13px}.notice-list li{margin:0}.song-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}.song-card{text-align:center;gap:10px}.song-cover{width:100%;height:auto;display:block;border-radius:8px;border:1px solid var(--border)}.song-title{font-weight:600;font-size:14px}.song-diff{font-size:12px;color:var(--muted)}.highlight{color:var(--error);font-weight:600}.modal-status{font-size:12px;color:var(--error)}.rules-head{font-size:12px;letter-spacing:2px;color:var(--muted)}.rules-body{display:grid;gap:12px;line-height:1.7}.rules-body h3{margin:4px 0 0;font-size:16px}.rules-body h4{margin:2px 0 0;font-size:14px;color:var(--muted)}.rules-body p{margin:0;color:var(--muted)}.rules-body ul{margin:0;padding-left:18px;color:var(--muted)}.rules-body li{margin-bottom:6px}.sidebar{position:sticky;top:18px;align-self:start}.sidebar-card .actions{display:grid;gap:10px}.sidebar-note{margin:0;color:var(--muted);font-size:12px}@media (max-width: 980px){.sidebar{position:static}}.auth-header{display:grid;gap:8px;margin:28px 0 18px;text-align:center}.auth-header h1{margin:0;font-size:24px}.auth-header p{margin:0;color:var(--muted);font-size:13px}.auth-layout{display:grid;grid-template-columns:minmax(0,520px);gap:22px;justify-content:center}.auth-main{display:grid;gap:16px}.auth-sidebar{display:grid;gap:16px;position:sticky;top:18px;align-self:start}.side-drawer{position:fixed;top:0;left:0;width:260px;height:100vh;background:var(--panel);border-right:1px solid var(--border);transform:translate(-100%);transition:transform .2s ease;z-index:40;display:grid;grid-template-rows:auto 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0;color:var(--muted);font-size:12px}.drawer-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f122059;opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:30}.drawer-open .side-drawer{transform:translate(0)}.drawer-open .drawer-backdrop{opacity:1;pointer-events:auto}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f122073;opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:50}.modal{position:fixed;top:50%;left:50%;width:min(90vw,360px);transform:translate(-50%,-50%) scale(.98);background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:18px;box-shadow:0 10px 30px #0a101e33;opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;z-index:60;display:grid;gap:12px}.modal-header{display:flex;align-items:center;justify-content:space-between;gap:10px}.modal-title{margin:0;font-size:16px}.modal-actions{display:grid;gap:10px}.modal-backdrop.is-open{opacity:1;pointer-events:auto}.modal.is-open{opacity:1;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}.leaderboard-table{display:grid;gap:8px}.leaderboard-row{display:grid;grid-template-columns:64px 1.4fr 1fr 1fr;gap:8px;padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:var(--panel-2);font-size:13px;align-items:center}.leaderboard-row.head{background:var(--panel);font-weight:600;color:var(--muted)}.leaderboard-row>div,.leaderboard-row>button{display:flex;align-items:center}.leaderboard-row>div:nth-child(1),.leaderboard-row>div:nth-child(3),.leaderboard-row>div:nth-child(4){justify-content:center}.leaderboard-empty{text-align:center;color:var(--muted);padding:16px 0}.leaderboard-gap{margin:8px 0 12px;padding:10px 12px;border-radius:8px;border:1px dashed var(--border);color:var(--muted);font-size:12px;text-align:center;background:var(--panel)}.leaderboard-name{background:transparent;border:none;padding:0;text-align:left;color:var(--accent);font-weight:600;cursor:pointer;justify-self:start}.image-grid{display:grid;gap:10px}.image-viewer{display:grid;gap:12px}.viewer-frame{display:grid;place-items:center;padding:10px;border-radius:10px;border:1px solid var(--border);background:var(--panel-2)}.viewer-image{width:100%;max-height:420px;object-fit:contain;border-radius:8px}.viewer-controls{display:flex;align-items:center;justify-content:space-between;gap:10px}.viewer-controls.is-hidden{display:none}.detail-message{text-align:center;color:var(--muted);font-size:12px}.viewer-count{font-size:12px;color:var(--muted)}.viewer-controls button:disabled{opacity:.5;cursor:not-allowed}@media (max-width: 720px){.leaderboard-row{grid-template-columns:1fr 1fr}.leaderboard-row.head{display:none}}footer{margin-top:28px;color:var(--muted);font-size:12px;text-align:center}