:root{--bg:#f4f5fb;--fg:#121a2c;--muted:#5b6478;--brand:#3346d3;--card:#fff;--line:#e3e7ef;--bad:#c62828}
@media (prefers-color-scheme:dark){:root{--bg:#10131c;--fg:#e8eaf2;--muted:#9aa3b8;--brand:#8c9bff;--card:#1a1f2c;--line:#2a3142;--bad:#ff8a80}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:760px;margin:0 auto;padding:24px 16px 64px}h1{font-size:1.8rem;line-height:1.25;margin:.4em 0}h2{font-size:1.15rem;margin:1.6em 0 .4em}
a{color:var(--brand)}.meta{color:var(--muted);font-size:.9rem}.back a{text-decoration:none;font-weight:600}ul{padding-left:1.2em}li{margin:.3em 0}
.box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;margin:18px 0}
label{display:block;font-weight:600;margin:12px 0 6px}label.row{font-weight:400;display:flex;gap:8px;align-items:flex-start}
input[type=text],input:not([type]),input[inputmode]{width:100%;padding:12px;border:1px solid var(--line);border-radius:10px;font-size:1rem;background:var(--bg);color:var(--fg)}
button{margin-top:12px;padding:12px 18px;border:0;border-radius:10px;background:var(--brand);color:#fff;font-size:1rem;font-weight:600;cursor:pointer}
button.danger{background:var(--bad)}#msg{min-height:1.4em}#msg.bad{color:var(--bad)}
.hero{padding:40px 0 10px}.hero p{font-size:1.1rem;color:var(--muted)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:20px 0}
.grid div{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px}footer{margin-top:40px;color:var(--muted);font-size:.9rem}