:root{--bg:#0b0d10;--canvas:#000;--panel:#12151a;--panel-2:#181c22;--panel-3:#1f242c;--line:#2a313b;--line-strong:#3a4350;--text:#e7ebf0;--text-2:#aab3bf;--text-3:#7d8794;--accent:#5ec4ff;--accent-ink:#04121c;--accent-soft:#5ec4ff24;--ok:#4fd18b;--warn:#f2c14e;--bad:#ff6b6b;--ref:#ffd166;--mine:#5ec4ff;--radius:8px;--radius-sm:6px;--font:"Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--mono:ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, monospace;--toolbar-h:48px;--focus:0 0 0 2px var(--bg), 0 0 0 4px var(--accent);--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{background:var(--bg);color:var(--text);font:14px/1.45 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12px;display:inline-flex;text-decoration:none!important}.btn:hover{background:var(--panel-3);border-color:var(--line-strong)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--accent-ink);font-weight:600}.btn.primary:hover{filter:brightness(1.08)}.btn.ghost{background:0 0;border-color:#0000}.btn.ghost:hover{background:var(--panel-2)}.btn.lg{height:44px;padding:0 20px;font-size:15px}.btn.sm{height:26px;padding:0 8px;font-size:12px}.btn.danger{color:var(--bad)}.icon-btn{border-radius:var(--radius-sm);width:34px;height:34px;color:var(--text-2);cursor:pointer;background:0 0;border:1px solid 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8px;font-size:11.5px;display:inline-flex}.chip.accent{color:var(--accent);background:var(--accent-soft);border-color:#5ec4ff73}.chip.ok{color:var(--ok);border-color:#4fd18b73}.chip.warn{color:var(--warn);border-color:#f2c14e73}.chip.bad{color:var(--bad);border-color:#ff6b6b73}button.chip{cursor:pointer}button.chip:hover{border-color:var(--line-strong);color:var(--text)}button.chip[aria-pressed=true]{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px}.stack{flex-direction:column;gap:12px;display:flex}.row{align-items:center;gap:8px;display:flex}.row.wrap{flex-wrap:wrap}.spacer{flex:1}.divider{background:var(--line);height:1px;margin:4px 0}.kbd{border:1px solid var(--line-strong);min-width:20px;font:11px var(--mono);color:var(--text-2);text-align:center;border-bottom-width:2px;border-radius:4px;padding:0 5px;display:inline-block}.notice{border:1px solid var(--line);border-left:3px solid var(--warn);background:var(--panel-2);border-radius:var(--radius-sm);color:var(--text-2);padding:10px 12px}.notice.info{border-left-color:var(--accent)}.notice.bad{border-left-color:var(--bad)}.notice.ok{border-left-color:var(--ok)}.shell{flex-direction:column;height:100%;display:flex}.topnav{height:var(--toolbar-h);border-bottom:1px solid var(--line);background:var(--panel);flex:none;align-items:center;gap:4px;padding:0 12px;display:flex}.brand{color:var(--text);align-items:center;gap:8px;margin-right:12px;font-weight:650;display:flex;text-decoration:none!important}.brand-mark{background:radial-gradient(circle at 35% 35%, #9fe0ff 0, var(--accent) 45%, #0b5d87 100%);border-radius:6px;width:22px;height:22px}.navlink{border-radius:var(--radius-sm);height:32px;color:var(--text-2);align-items:center;gap:6px;padding:0 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(max-width:860px){.book-layout{overflow-y:auto;grid-template-columns:1fr!important}.book-layout>nav{max-height:40vh;box-shadow:none!important;position:static!important}}.vp-isolate{border:1px solid var(--line-strong);z-index:6;white-space:nowrap;background:#0a0c0fe6;border-radius:8px;align-items:center;gap:6px;max-width:calc(100% - 20px);padding:4px 6px 4px 10px;font-size:12.5px;display:flex;position:absolute;bottom:10px;left:50%;transform:translate(-50%)}.vp-hidden-labels{color:var(--text-2);pointer-events:none;background:#0a0c0fbf;border-radius:999px;padding:2px 8px;font-size:11px;position:absolute;bottom:8px;left:50%;transform:translate(-50%)}.atlas-grid{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:2px 12px;display:grid}.atlas-item.open{background:var(--panel-2,#ffffff08);border-radius:6px;grid-column:1/-1}.drill{background:var(--bg);grid-template-columns:minmax(0,1fr) minmax(300px,380px);height:100%;min-height:0;display:grid}.drill-view{background:var(--canvas);min-width:0;min-height:0;position:relative}.drill-side{border-left:1px solid var(--line);background:var(--panel);gap:12px;min-height:0;padding:16px;overflow-y:auto}.drill-choice{text-align:left;justify-content:flex-start;min-height:38px}.drill-choice svg{margin-left:auto}.drill-choice.ok{color:#9af0c0;border-color:#4fd18b}.drill-choice.bad{color:#ffb3b3;border-color:#ff6b6b}@media (max-width:860px){.drill{grid-template-rows:minmax(300px,58vh) auto;grid-template-columns:1fr;overflow-y:auto}.drill-side{border-left:0;border-top:1px solid var(--line)}}.struct-note{border:1px solid var(--line);background:var(--panel-2,#ffffff08);border-radius:8px;gap:4px;padding:8px 10px;font-size:12.5px}.coach-step{border-bottom:1px solid var(--line);grid-template-columns:20px 1fr;gap:6px;padding:8px 0;display:grid}.coach-step.done>div>b{opacity:.7;text-decoration:line-through}.coach-step ul{margin:4px 0 6px;padding-left:16px;font-size:12.5px}