:root{--bg:#f6f7fb;--fg:#1d2433;--card:#fff;--line:#d5d9e4;--pri:#2457c5;--pri-fg:#fff;--ok:#0b7a3b;--ok-bg:#e5f5ec;--bad:#b3261e;--bad-bg:#fdebea;--mute:#566074}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:18px/1.65 system-ui,-apple-system,"Malgun Gothic","Apple SD Gothic Neo",sans-serif;overflow-wrap:anywhere}
main{max-width:640px;margin:0 auto;padding:16px 16px 40px;outline:none}
h1{font-size:24px;line-height:1.35;margin:8px 0 12px}
h2{font-size:20px;margin:0 0 8px}
p{margin:0 0 12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin:0 0 14px}
.mute{color:var(--mute);font-size:16px}
.btn{display:flex;align-items:center;justify-content:center;width:100%;min-height:60px;padding:10px 16px;border:2px solid var(--pri);border-radius:14px;background:var(--pri);color:var(--pri-fg);font:inherit;font-weight:700;text-decoration:none;cursor:pointer;margin:0 0 10px}
.btn.sec{background:#fff;color:var(--pri)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn:focus-visible,.opt:focus-visible,.dot:focus-visible,.timeopt:focus-within{outline:3px solid #f2a900;outline-offset:2px}
.row{display:flex;gap:10px}.row .btn{flex:1}
.timeopt{display:flex;align-items:center;gap:12px;min-height:60px;padding:8px 12px;border:2px solid var(--line);border-radius:14px;margin:0 0 10px;background:#fff;cursor:pointer}
.timeopt input{width:24px;height:24px;flex:none}
.timeopt.on{border-color:var(--pri);background:#eef3ff}
.top{display:flex;justify-content:space-between;align-items:center;gap:8px;margin:0 0 10px;font-weight:700}
.timer{font-variant-numeric:tabular-nums;padding:4px 12px;border-radius:999px;background:#eef3ff;color:var(--pri)}
.timer.low{background:var(--bad-bg);color:var(--bad)}
.stem{font-size:20px;line-height:1.6;margin:0 0 14px;font-weight:600}
.opt{display:flex;align-items:center;gap:12px;width:100%;min-height:60px;padding:10px 14px;margin:0 0 10px;text-align:left;border:2px solid var(--line);border-radius:14px;background:#fff;color:var(--fg);font:inherit;cursor:pointer}
.opt .lt{flex:none;width:34px;height:34px;border-radius:50%;border:2px solid var(--line);display:grid;place-items:center;font-weight:700;font-size:16px}
.opt[aria-checked=true]{border-color:var(--pri);background:#eef3ff}
.opt[aria-checked=true] .lt{background:var(--pri);border-color:var(--pri);color:#fff}
.dots{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin:6px 0 14px}
.dot{min-height:48px;border:2px solid var(--line);border-radius:10px;background:#fff;font:inherit;font-weight:700;cursor:pointer}
.dot.done{background:#eef3ff;border-color:var(--pri);color:var(--pri)}
.dot.cur{box-shadow:0 0 0 3px #f2a900}
.score{font-size:40px;font-weight:800;text-align:center;margin:4px 0}
.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:15px;font-weight:700}
.badge.ok{background:var(--ok-bg);color:var(--ok)}.badge.bad{background:var(--bad-bg);color:var(--bad)}
.res{border-left:6px solid var(--line)}.res.ok{border-left-color:var(--ok)}.res.bad{border-left-color:var(--bad)}
.ans{margin:8px 0}
.ex dt{font-weight:700;margin-top:10px;color:var(--pri)}
.ex dd{margin:0}
.warn{background:#fff6e0;border:1px solid #f2c14e;border-radius:12px;padding:10px 12px;margin:0 0 10px}
.notice{font-size:16px;color:var(--mute)}
@media (max-width:400px){h1{font-size:22px}}
.material{background:#f1f4fa;border-left:5px solid var(--pri);border-radius:8px;padding:12px 14px;margin:0 0 12px}
.exlist{margin:0;padding-left:20px}.exlist li{margin:0 0 6px}
.sharefb{user-select:all;word-break:break-all}
[hidden]{display:none!important}