:root{--bg:#fff;--fg:#1a1a1a;--muted:#6b6b6b;--accent:#2f6feb;--border:#e2e2e2;--surface:#f7f7f8;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#16171a;--fg:#ececec;--muted:#9a9a9a;--accent:#6aa0ff;--border:#2c2e33;--surface:#1f2126}}*{box-sizing:border-box}body{background:var(--bg);color:var(--fg);margin:0;font:16px/1.6 ui-sans-serif,system-ui,-apple-system,Segoe UI,sans-serif}.page{max-width:42rem;margin:0 auto;padding:3rem 1.25rem}h1{margin:0 0 .75rem;font-size:1.75rem;line-height:1.2}.muted{color:var(--muted)}.small{font-size:.875rem}code{background:var(--surface);border:1px solid var(--border);border-radius:4px;padding:.1em .35em;font-size:.9em}.row{flex-wrap:wrap;gap:.75rem;margin:1rem 0;display:flex}button{font:inherit;background:var(--accent);color:#fff;cursor:pointer;border:1px solid #0000;border-radius:6px;padding:.5rem 1rem}button.ghost{color:var(--fg);border-color:var(--border);background:0 0}button:hover{filter:brightness(1.08)}button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}a{color:var(--accent)}.head{justify-content:space-between;align-items:baseline;gap:1rem;margin-bottom:1.5rem;display:flex}.head h1{margin:0}.progress{margin-bottom:1.5rem}.progress-bar{background:var(--surface);border:1px solid var(--border);border-radius:3px;height:6px;overflow:hidden}.progress-bar span{background:var(--accent);height:100%;transition:width .18s;display:block}.progress p{margin:.5rem 0 0}.card{border:1px solid var(--border);background:var(--surface);border-radius:10px;padding:1.5rem}.qnum{letter-spacing:.06em;text-transform:uppercase;color:var(--muted);align-items:center;gap:.5rem;margin:0 0 .5rem;font-size:.8rem;display:flex}.question{margin:0 0 1rem;font-size:1.35rem;line-height:1.35}.answer{margin:0 0 1rem;font-size:1.05rem}.proofs{flex-wrap:wrap;gap:.4rem;margin:0;display:flex}.proofs cite{color:var(--muted);border:1px solid var(--border);background:var(--bg);border-radius:999px;padding:.15rem .6rem;font-size:.8rem;font-style:normal}.reveal{width:100%}.tag{text-transform:uppercase;letter-spacing:.04em;border-radius:999px;padding:.1rem .5rem;font-size:.7rem}.tag.known{color:#fff;background:#1f7a4d}.tag.review{color:#fff;background:#9a6b12}kbd{font:inherit;opacity:.65;border:1px solid;border-radius:3px;margin-left:.4em;padding:0 .3em;font-size:.75em}.nav{justify-content:space-between}.list{margin:0;padding:0;list-style:none}.list li{border-bottom:1px solid var(--border)}.listitem{text-align:left;width:100%;color:var(--fg);background:0 0;border:0;border-radius:0;align-items:baseline;gap:.75rem;padding:.7rem .25rem;display:flex}.listitem:hover{background:var(--surface);filter:none}.listnum{color:var(--muted);font-variant-numeric:tabular-nums;min-width:2.25rem}