:root{--bg: #0f1115;--panel: #181b22;--panel-2: #1f232c;--border: #2a2f3a;--text: #e6e9ef;--muted: #9aa3b2;--accent: #4f8cff;--accent-hover: #6aa0ff;--danger: #e5484d;--danger-hover: #f06a6e;--success: #30a46c;--warn: #e2a03f;--radius: 8px;--mono: ui-monospace, SFMono-Regular, Menlo, monospace;--sans: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font-family:var(--sans);font-size:14px;line-height:1.5}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.app-shell{display:grid;grid-template-columns:220px 1fr;min-height:100vh}.sidebar{background:var(--panel);border-right:1px solid var(--border);padding:16px 12px;display:flex;flex-direction:column}.sidebar .brand{font-weight:700;font-size:16px;padding:8px 10px 16px;letter-spacing:.5px}.sidebar nav a{display:block;padding:8px 10px;border-radius:var(--radius);color:var(--muted);margin-bottom:2px}.sidebar nav a:hover{background:var(--panel-2);color:var(--text);text-decoration:none}.sidebar nav a.active{background:var(--accent);color:#fff}.sidebar .spacer{flex:1}.sidebar .me{border-top:1px solid var(--border);padding-top:12px;font-size:12px;color:var(--muted)}.sidebar .me strong{color:var(--text);display:block}.main{padding:24px 28px;overflow-x:auto}.page-title{margin:0 0 4px;font-size:20px}.page-sub{margin:0 0 20px;color:var(--muted)}.panel{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin-bottom:16px}.panel h3{margin:0 0 12px;font-size:14px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px}.card{background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:16px}.card .label{color:var(--muted);font-size:12px;text-transform:uppercase}.card .value{font-size:22px;font-weight:700;margin-top:4px}table.data{width:100%;border-collapse:collapse;font-size:13px}table.data th,table.data td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);vertical-align:top}table.data th{color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase;letter-spacing:.4px}table.data tr:hover td{background:var(--panel-2)}table.data .mono{font-family:var(--mono);font-size:12px}.field{margin-bottom:12px}.field label{display:block;font-size:12px;color:var(--muted);margin-bottom:4px}input,select,textarea{width:100%;background:var(--panel-2);border:1px solid var(--border);color:var(--text);border-radius:var(--radius);padding:8px 10px;font-family:inherit;font-size:14px}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent)}textarea{min-height:80px;resize:vertical}.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}.row .field{flex:1;min-width:140px}button{background:var(--accent);color:#fff;border:none;border-radius:var(--radius);padding:8px 14px;font-size:14px;font-family:inherit;cursor:pointer}button:hover{background:var(--accent-hover)}button:disabled{opacity:.5;cursor:not-allowed}button.secondary{background:var(--panel-2);border:1px solid var(--border);color:var(--text)}button.secondary:hover{background:var(--border)}button.danger{background:var(--danger)}button.danger:hover{background:var(--danger-hover)}button.small{padding:4px 8px;font-size:12px}.btn-row{display:flex;gap:8px;flex-wrap:wrap}.badge{display:inline-block;padding:2px 8px;border-radius:999px;font-size:11px;font-weight:600;background:var(--panel-2);border:1px solid var(--border);color:var(--muted)}.badge.green{color:var(--success);border-color:var(--success)}.badge.red{color:var(--danger);border-color:var(--danger)}.badge.amber{color:var(--warn);border-color:var(--warn)}.badge.blue{color:var(--accent);border-color:var(--accent)}.state{padding:24px;text-align:center;color:var(--muted)}.state.error{color:var(--danger)}.toolbar{display:flex;gap:8px;align-items:center;margin-bottom:16px;flex-wrap:wrap}.pager{display:flex;gap:8px;margin-top:16px;align-items:center}.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:24px}.login-card{width:100%;max-width:440px;background:var(--panel);border:1px solid var(--border);border-radius:var(--radius);padding:28px}.login-card h1{margin:0 0 4px;font-size:20px}.login-card p{color:var(--muted);margin:0 0 20px}.kv{display:grid;grid-template-columns:160px 1fr;gap:6px 12px;font-size:13px}.kv dt{color:var(--muted)}.kv dd{margin:0;word-break:break-word}pre.json{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:10px;overflow-x:auto;font-family:var(--mono);font-size:12px;margin:0}.chat-entry{padding:6px 10px;border-bottom:1px solid var(--border);font-size:13px}.chat-entry .who{font-weight:600}.chat-entry.correct .content{color:var(--success)}.match-feed{display:flex;flex-direction:column;gap:14px}.feed-round{display:flex;flex-direction:column;gap:6px}.feed-round-head{align-self:center;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--muted);background:var(--panel-2);border:1px solid var(--border);border-radius:999px;padding:2px 12px;margin:4px 0}.feed-round-q{align-self:center;max-width:90%;text-align:center;font-size:12px;color:var(--text);margin:0 0 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6px}.feed-tag.win{color:var(--success);border-color:var(--success)}.feed-bubble{display:inline-flex;align-items:baseline;gap:6px;background:var(--panel-2);border:1px solid var(--border);border-radius:12px;padding:6px 12px;font-size:13px;line-height:1.4;word-break:break-word;white-space:pre-wrap}.feed-row.side-a .feed-bubble{border-bottom-left-radius:4px}.feed-row.side-b .feed-bubble{border-bottom-right-radius:4px}.feed-bubble.correct{background:color-mix(in srgb,var(--success) 16%,var(--panel-2));border-color:var(--success);color:var(--text)}.feed-check{color:var(--success);font-weight:700;flex:0 0 auto}.feed-bubble.wrong{background:var(--panel-2);border-color:var(--border);color:var(--muted)}.feed-bubble.neutral{background:var(--panel-2);border-color:var(--border);color:var(--text)}.feed-text{min-width:0}.inline-msg{font-size:12px;margin-top:8px}.inline-msg.error{color:var(--danger)}.inline-msg.success{color:var(--success)}