:root{--bg:#f4f5f7;--surface:#fff;--ink:#1a1d23;--ink-2:#3a3f47;--muted:#8b95a1;--accent:#2563eb;--accent-soft:#eff4ff;--green:#16a34a;--green-soft:#f0fdf4;--red:#dc2626;--border:#e5e7eb;--border-light:#f0f1f3;--sidebar-bg:#fff;--sidebar-w:248px;--cell-gap:2px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,Helvetica Neue,Arial,sans-serif;font-size:14px;line-height:1.5}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{color:inherit}a{color:inherit;text-decoration:none}.app-layout{grid-template-columns:var(--sidebar-w) 1fr;min-height:100vh;display:grid}.sidebar{background:var(--sidebar-bg);border-right:1px solid var(--border);flex-direction:column;height:100vh;display:flex;position:sticky;top:0}.sidebar-brand{border-bottom:1px solid var(--border-light);align-items:center;gap:10px;padding:18px 18px 16px;display:flex}.brand-mark{background:var(--ink);color:var(--surface);border-radius:6px;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:28px;font-size:12px;font-weight:700;display:inline-flex}.brand-mark span{color:var(--accent)}.brand-name{color:var(--ink);font-size:14px;font-weight:600}.sidebar-section{flex:1;padding:12px 0;overflow-y:auto}.sidebar-label{color:var(--muted);letter-spacing:.8px;text-transform:uppercase;padding:8px 18px 6px;font-size:10px;font-weight:600}.sidebar-contests{flex-direction:column;gap:2px;padding:0 8px;display:flex}.sidebar-item{cursor:pointer;text-align:left;background:0 0;border:0;border-radius:8px;flex-direction:column;align-items:flex-start;gap:2px;width:100%;padding:10px 12px;transition:background .12s;display:flex}.sidebar-item:hover{background:var(--bg)}.sidebar-item.active{background:var(--accent-soft)}.sidebar-item-name{color:var(--ink);font-size:13px;font-weight:600}.sidebar-item.active .sidebar-item-name{color:var(--accent)}.sidebar-item-title{color:var(--muted);font-size:11px;line-height:1.3}.sidebar-item-meta{color:var(--muted);opacity:.75;margin-top:2px;font-family:SF Mono,Consolas,monospace;font-size:10px}.sidebar-footer{border-top:1px solid var(--border-light);padding:12px 18px}.sync-status{color:var(--muted);font-size:11px}.sync-status i{background:var(--green);vertical-align:middle;border-radius:50%;width:6px;height:6px;margin-right:6px;display:inline-block}.sync-status strong{color:var(--ink-2);font-family:SF Mono,Consolas,monospace;font-weight:600}.main-content{min-width:0;padding:24px 28px 48px}.main-header{justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px;display:flex}.main-header h1{letter-spacing:-.3px;color:var(--ink);margin:0 0 4px;font-size:18px;font-weight:700}.main-header p{color:var(--muted);margin:0;font-size:12px}.stat-grid{grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:16px;display:grid}.stat-grid article{background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:12px 14px}.stat-grid article>span{color:var(--muted);text-transform:uppercase;letter-spacing:.3px;font-size:10px;font-weight:500;display:block}.stat-grid article>strong{color:var(--ink);text-overflow:ellipsis;white-space:nowrap;margin-top:4px;font-size:20px;font-weight:600;display:block;overflow:hidden}.stat-grid .leader-stat{background:var(--accent-soft);border-color:#d4e1fc}.stat-grid .leader-stat>span{color:var(--accent)}.stat-grid .leader-stat>strong{color:var(--accent);font-size:16px}.toolbar{background:var(--surface);border:1px solid var(--border);border-radius:8px;align-items:center;gap:10px;min-height:44px;margin-bottom:12px;padding:6px 10px;display:flex}.search{background:var(--bg);border-radius:6px;align-items:center;width:100%;max-width:280px;height:32px;padding:0 8px;display:flex}.search>span{color:var(--muted);font-size:15px}.search input{color:var(--ink);background:0 0;border:0;outline:none;width:100%;min-width:0;height:100%;padding:0 6px;font-size:12px}.search button{cursor:pointer;color:var(--muted);background:0 0;border:0;font-size:15px}.filters{gap:4px;display:flex}.filters button{border:1px solid var(--border);cursor:pointer;height:30px;color:var(--muted);background:0 0;border-radius:6px;padding:0 10px;font-size:11px;font-weight:500;transition:all .12s}.filters button:hover{color:var(--ink-2);border-color:#c5c9cf}.filters button.active{background:var(--ink);border-color:var(--ink);color:var(--surface)}.result-count{color:var(--muted);white-space:nowrap;margin-left:auto;font-family:SF Mono,Consolas,monospace;font-size:11px}.table-shell{background:var(--surface);border:1px solid var(--border);border-radius:8px;position:relative;overflow:auto}.scroll-hint{display:none}table{border-collapse:separate;border-spacing:var(--cell-gap);width:100%;min-width:960px;font-size:12px}th,td{text-align:center;vertical-align:middle;height:44px;padding:0 6px}thead th{background:var(--bg);color:var(--muted);letter-spacing:.3px;z-index:3;height:42px;font-size:10px;font-weight:600;position:sticky;top:0}thead th b{color:var(--ink);font-family:SF Mono,Consolas,monospace;font-size:12px;font-weight:700;display:block}thead th small{color:var(--muted);margin-top:1px;font-family:SF Mono,Consolas,monospace;font-size:9px;display:block}thead th.problem-column{color:#fff}thead th.problem-column b{color:#fff;font-size:13px}thead th.problem-column small{color:#ffffffbf}tbody tr{cursor:pointer}tbody tr:hover td.cell{filter:brightness(.94)}tbody tr:hover td:not(.cell){background:#f0f1f3}tbody tr.is-selected td:not(.cell){background:var(--accent-soft)}tbody tr.is-selected td.cell{outline:2px solid var(--accent);outline-offset:-2px}.rank-column{background:var(--surface);z-index:2;width:44px;min-width:44px;position:sticky;left:0}thead 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span{color:var(--muted);margin-top:4px;font-size:11px}.export-button{background:var(--surface);border:1px solid var(--border);cursor:pointer;height:34px;color:var(--ink-2);white-space:nowrap;border-radius:6px;padding:0 14px;font-size:12px;font-weight:500;transition:all .12s}.export-button:hover{background:var(--ink);color:var(--surface);border-color:var(--ink)}.player-panel{background:var(--surface);border:1px solid var(--border);z-index:70;border-radius:10px;width:min(340px,100vw - 40px);max-height:calc(100vh - 80px);padding:20px;position:fixed;bottom:20px;right:20px;overflow:auto;box-shadow:0 8px 32px #00000014,0 2px 8px #0000000a}.panel-close{background:var(--bg);cursor:pointer;width:28px;height:28px;color:var(--muted);border:0;border-radius:6px;font-size:16px;transition:all .12s;position:absolute;top:14px;right:14px}.panel-close:hover{background:var(--border);color:var(--ink)}.player-panel>p{color:var(--accent);letter-spacing:.8px;text-transform:uppercase;margin:0 0 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4px;font-size:12px;display:grid}.player-panel li.solved{background:#78dc6459}.player-panel li.attempted{background:#f082824d}.player-panel li>span{color:var(--muted);font-family:SF Mono,Consolas,monospace;font-weight:700}.player-panel li b{font-weight:500}.player-panel li em{text-align:right;font-family:SF Mono,Consolas,monospace;font-size:12px;font-style:normal;font-weight:600}.player-panel li.solved em{color:var(--green)}.player-panel li.attempted em{color:var(--red)}@media (max-width:900px){:root{--sidebar-w:200px}.main-content{padding:20px}.stat-grid{grid-template-columns:repeat(2,1fr)}.toolbar{flex-wrap:wrap}.search{max-width:none}}@media (max-width:680px){.app-layout{grid-template-columns:1fr}.sidebar{border-right:0;border-bottom:1px solid var(--border);height:auto;position:relative}.sidebar-section{padding:8px 0}.sidebar-contests{scrollbar-width:none;flex-direction:row;gap:6px;padding:0 12px 8px;overflow-x:auto}.sidebar-contests::-webkit-scrollbar{display:none}.sidebar-item{flex-direction:row;flex:none;align-items:center;gap:0 8px;min-width:max-content;padding:8px 12px}.sidebar-item-title,.sidebar-label,.sidebar-footer{display:none}.sidebar-brand{padding:12px 16px}.main-content{padding:16px}.main-header{flex-direction:column;align-items:flex-start;gap:10px}.main-header h1{font-size:16px}.stat-grid{grid-template-columns:repeat(2,1fr);gap:8px}.stat-grid article>strong{font-size:16px}.result-count{display:none}.scroll-hint{color:#854d0e;text-align:center;background:#fef9c3;padding:6px 12px;font-size:10px;display:block}.rank-column{width:38px;min-width:38px}.player-column{min-width:160px;left:38px}.avatar.small{display:none}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}