:root{color-scheme:light;--bg:#f0f5ff;--surface:#fff;--text:#172033;--primary:#2563eb;--muted:#53647a;--border:#ccd7ea;--good:#146b46;--bad:#9b2535}*{box-sizing:border-box}body{margin:0;font-family:system-ui,sans-serif;line-height:1.65;background:var(--bg);color:var(--text);padding-bottom:env(safe-area-inset-bottom)}header,.statusbar,main,footer,.notice{max-width:1000px;margin:auto;padding:16px 24px}header{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:max(16px,env(safe-area-inset-top))}header>a{font-size:1.3rem;font-weight:800}nav{display:flex;gap:16px;flex-wrap:wrap}a{color:var(--primary)}.statusbar{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:.9rem;color:var(--muted)}main{margin:12px auto;min-height:55vh}h1,h2{line-height:1.3;overflow-wrap:anywhere}h1{font-size:clamp(1.5rem,5vw,2.1rem)}h2{font-size:1.3rem}.card{background:var(--surface);border:1px solid var(--border);border-radius:20px;padding:24px;margin:16px 0;box-shadow:0 8px 28px #17203308;min-width:0}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,260px),1fr));gap:16px}.grid .card{margin:0}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:20px}button,.button{font:inherit;border-radius:12px;border:1px solid var(--primary);padding:10px 18px;background:var(--primary);color:#fff;cursor:pointer;min-height:44px;text-decoration:none;display:inline-block;overflow-wrap:anywhere}button.secondary{background:white;color:var(--primary)}button:disabled{opacity:.6;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #b87300;outline-offset:3px}input:not([type=radio]):not([type=checkbox]),select{font:inherit;font-size:1rem;padding:10px;border:1px solid var(--border);border-radius:8px;max-width:100%;width:100%;background:white;color:var(--text)}label{display:block;margin:12px 0}label>input:not([type=radio]):not([type=checkbox]),label>select{display:block;margin-top:6px}label.option{display:flex;align-items:flex-start;gap:10px;border:1px solid var(--border);padding:12px;border-radius:12px;cursor:pointer}label.option:has(input:checked){border-color:var(--primary);background:#eff5ff}input[type=radio],input[type=checkbox]{width:20px;height:20px;flex:0 0 20px;margin:4px 0 0;accent-color:var(--primary)}fieldset{border:0;padding:0;margin:0;min-width:0}fieldset:disabled label.option{cursor:default}legend{font-weight:700;margin-bottom:8px}progress{width:100%;height:18px;accent-color:var(--primary)}.feedback{border-left:5px solid var(--good);background:#eaf8f0;padding:18px;border-radius:10px;margin-top:20px;scroll-margin:16px}.feedback.wrong{border-color:var(--bad);background:#fff0f2}.feedback:focus{outline:2px solid var(--good);outline-offset:3px}.muted,footer{color:var(--muted)}.passage{background:#f7f9fc;padding:18px;border-radius:12px;margin:16px 0}.passage p{max-width:75ch}.token{display:inline;padding:4px 6px;min-height:44px;margin:2px;background:white;color:var(--text);border:1px solid var(--border)}.token[aria-pressed=true]{background:#dbeafe;border-color:var(--primary);box-shadow:inset 0 0 0 1px var(--primary)}.correction{display:block;margin-top:8px}.notice{color:var(--bad);white-space:pre-wrap}.notice:empty{display:none}.warning{padding:12px;border-left:4px solid #996300;background:#fff7df;color:#614300;border-radius:6px}.stars{color:#926200;font-size:1.5rem}details{margin:16px 0;border-top:1px solid #b9d4c5;padding-top:12px}summary{cursor:pointer;font-weight:650}footer{font-size:.85rem}#app:focus{outline:none}.skip{position:absolute;top:-100px;left:12px;background:white;padding:12px;z-index:2}.skip:focus{top:8px}@media(max-width:600px){header,.statusbar,main,footer,.notice{padding:12px 16px}.card{padding:18px}button{max-width:100%}.passage{padding:14px}.feedback{padding:14px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}