:root{--bg:#f7f7f5;--surface:#fff;--text:#1d1d1f;--muted:#6b6b70;--border:#d9d9de;--primary:#2f6fdb;--primary-text:#fff;--ok:#1f8a4c;--bad:#c0392b;--radius:10px;--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light dark}@media (prefers-color-scheme:dark){:root{--lightningcss-light: ;--lightningcss-dark:initial;--bg:#17181a;--surface:#222327;--text:#ececef;--muted:#9a9aa2;--border:#3a3b40;--primary:#5b8ff0;--ok:#4cc27f;--bad:#ef6b5b}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5}header{border-bottom:1px solid var(--border);background:var(--surface);padding:12px 16px}.logo{color:var(--text);font-size:1.2rem;font-weight:700;text-decoration:none}main{max-width:720px;margin:0 auto;padding:16px}h1{margin:8px 0 12px}.muted{color:var(--muted);font-size:.9rem}code{background:var(--surface);border:1px solid var(--border);border-radius:4px;padding:0 4px}.btn{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);font:inherit;cursor:pointer;padding:8px 14px;text-decoration:none;display:inline-block}.btn:hover:not(:disabled){border-color:var(--primary)}.btn:disabled{opacity:.5;cursor:default}.btn.primary{background:var(--primary);border-color:var(--primary);color:var(--primary-text)}.btn.danger{color:var(--bad)}.btn.small{padding:4px 10px;font-size:.9rem}.toolbar{flex-wrap:wrap;gap:8px;margin:12px 0;display:flex}.lists{gap:10px;margin:0;padding:0;list-style:none;display:grid}.lists li{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;padding:12px;display:flex}.list-info{flex-direction:column;display:flex}.list-actions{flex-wrap:wrap;gap:6px;display:flex}.empty{text-align:center;background:var(--surface);border:1px dashed var(--border);border-radius:var(--radius);padding:24px}.editor,.setup{flex-direction:column;gap:12px;display:flex}.editor label,.setup>label{flex-direction:column;gap:4px;display:flex}.setup>label{flex-direction:row;align-items:center;gap:8px}.row{grid-template-columns:1fr 1fr;gap:12px;display:grid}fieldset{border:1px solid var(--border);border-radius:var(--radius);flex-direction:column;gap:4px;display:flex}input:not([type=radio]):not([type=checkbox]),textarea{border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);width:100%;color:var(--text);font:inherit;padding:10px}textarea{resize:vertical;font-family:ui-monospace,Consolas,monospace}.quiz,.summary{text-align:center;flex-direction:column;align-items:center;gap:12px;display:flex}.progress{background:var(--border);border-radius:4px;width:100%;height:8px;overflow:hidden}.bar{background:var(--ok);width:0;height:100%;transition:width .3s}.prompt{word-break:break-word;margin:24px 0 8px;font-size:2rem;font-weight:600}#answer-form{gap:8px;width:100%;max-width:420px;display:flex}#answer{text-align:center;font-size:1.3rem}#answer.correct{border-color:var(--ok);outline:2px solid var(--ok)}#answer.wrong{border-color:var(--bad);outline:2px solid var(--bad)}.feedback{min-height:1.6em;font-size:1.1rem}.ok{color:var(--ok);font-weight:600}.bad{color:var(--bad);font-weight:600}.score{margin:0;font-size:3rem;font-weight:700}.hardest{width:100%;max-width:420px;padding:0;list-style:none}.hardest li{border-bottom:1px solid var(--border);text-align:left;grid-template-columns:1fr 1fr auto;gap:8px;padding:6px 0;display:grid}@media (width<=480px){.row{grid-template-columns:1fr}.prompt{font-size:1.6rem}}