:root{--bg:#0b1220;--surface:#121b2e;--surface-2:#1a2540;--border:#2a3656;--text:#f4f6fb;--muted:#a9b3c8;--blue:#4f8cff;--blue-strong:#2f6bea;--ok:#3fb68b;--warn:#e0a93b;--bad:#ef6a6a;--radius:14px;--tap:48px}*{box-sizing:border-box}html{color-scheme:dark}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;padding-bottom:calc(var(--tap) + 28px + env(safe-area-inset-bottom))}a{color:var(--blue)}h1{font-size:1.5rem;margin:0 0 .5rem}h2{font-size:1.15rem;margin:1.5rem 0 .5rem}h3{font-size:1rem;margin:0}main{max-width:760px;margin:0 auto;padding:16px}.muted{color:var(--muted)}.small{font-size:.85rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:16px;margin:12px 0}.row{display:flex;gap:12px;justify-content:space-between;flex-wrap:wrap}.btn,.row{align-items:center}.btn{display:inline-flex;justify-content:center;min-height:var(--tap);padding:0 20px;border-radius:12px;border:1px solid var(--blue-strong);background:var(--blue-strong);color:#fff;font:inherit;font-weight:600;cursor:pointer;text-decoration:none}.btn.secondary{background:transparent;color:var(--text);border-color:var(--border)}.btn:disabled{opacity:.5;cursor:not-allowed}:focus-visible{outline:3px solid #fff;outline-offset:2px}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:5;background:var(--bg);border-bottom:1px solid var(--border)}.topbar .in{max-width:760px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{display:inline-flex;align-items:center;min-height:44px;font-weight:700;letter-spacing:.02em;color:var(--text);text-decoration:none}.tabs{position:fixed;left:0;right:0;bottom:0;background:var(--surface);border-top:1px solid var(--border);display:grid;grid-template-columns:repeat(3,1fr);padding-bottom:env(safe-area-inset-bottom);z-index:6}.tabs a{min-height:var(--tap);display:flex;align-items:center;justify-content:center;color:var(--muted);text-decoration:none;font-weight:600}.tabs a[aria-current=page]{color:var(--text);box-shadow:inset 0 3px 0 var(--blue)}.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.78rem;border:1px solid var(--border);color:var(--muted)}.pill.ok{color:var(--ok);border-color:var(--ok)}.pill.warn{color:var(--warn);border-color:var(--warn)}.pill.bad{color:var(--bad);border-color:var(--bad)}.bar{height:10px;border-radius:999px;background:var(--surface-2);overflow:hidden}.bar>i{display:block;height:100%;background:var(--blue)}.opt{display:flex;gap:12px;align-items:flex-start;width:100%;min-height:var(--tap);text-align:left;padding:12px 14px;margin:8px 0;border-radius:12px;border:1px solid var(--border);background:var(--surface-2);color:var(--text);font:inherit;cursor:pointer}.opt[aria-checked=true]{border-color:var(--blue);box-shadow:0 0 0 2px var(--blue) inset}.opt.right{border-color:var(--ok)}.opt.wrong{border-color:var(--bad)}.timer{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;font-weight:700}.timer.low{color:var(--warn)}.timer.crit{color:var(--bad)}.grid{display:grid;grid-gap:12px;gap:12px}@media (min-width:640px){.grid.two{grid-template-columns:1fr 1fr}}input[type=number],select{min-height:var(--tap);background:var(--surface-2);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:0 10px;font:inherit;width:100%}label{display:block;margin:10px 0 4px;font-weight:600}.sr{position:absolute;left:-9999px}@media (prefers-reduced-motion:no-preference){.bar>i{transition:width .3s}}.brand-tile{display:inline-flex;align-items:center;justify-content:center;background:#f4f6fb;border-radius:10px;padding:4px 8px}