:root{--ink:#1b1b1a;--muted:#6b6a66;--line:#e4e2dc;--accent:#2457c5;--bg:#fbfaf8}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:18px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:680px;margin:0 auto;padding:28px 20px 80px}h1{font-size:1.4rem;margin:0 0 12px}
.muted{color:var(--muted);font-size:.9rem}.bar{height:4px;background:var(--line);border-radius:2px;margin-bottom:24px}
.bar>i{display:block;height:100%;background:var(--accent);border-radius:2px}
article h2{font-size:1.3rem;margin:1.4em 0 .4em}article h3{font-size:1.15rem;margin:1.3em 0 .35em}article h4,article h5,article h6{font-size:1.02rem;margin:1.2em 0 .3em}
article table{border-collapse:collapse;margin:1em 0;font-size:.95rem}article td,article th{border:1px solid var(--line);padding:4px 8px;text-align:left}
article blockquote{margin:1em 0;padding-left:14px;border-left:3px solid var(--line);color:#3d3d3a}
article pre{background:#f1efea;padding:10px;overflow:auto;font-size:.85rem}article code{background:#f1efea;padding:0 3px;border-radius:3px}
button{font:inherit;padding:12px 22px;border-radius:10px;border:0;background:var(--accent);color:#fff;cursor:pointer;margin-top:24px}
button:disabled{opacity:.4;cursor:default}label.opt{display:block;border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:10px 0;background:#fff;cursor:pointer}
label.opt input{margin-right:10px}label.opt.dk{color:var(--muted)}
.scale{display:flex;gap:6px;margin:8px 0 2px}.scale label{flex:1;text-align:center;border:1px solid var(--line);border-radius:8px;padding:8px 0;background:#fff;cursor:pointer}
.scale input{display:none}.scale label.on{background:var(--accent);color:#fff;border-color:var(--accent)}
.ends{display:flex;justify-content:space-between;font-size:.8rem;color:var(--muted);margin-bottom:18px}
textarea,select{font:inherit;width:100%;padding:8px;border:1px solid var(--line);border-radius:8px;background:#fff}
.error{color:#b42318}