:root{--brand:#4f6bed;--kid:#ff8a3d;--bg:#f6f7fb;--card:#fff;--text:#1c2033;--muted:#6b7090;--ok:#1e9e5a;--danger:#d93840;--line:#e6e8f0}
@media (prefers-color-scheme:dark){:root{--bg:#12141c;--card:#1c1f2a;--text:#eceef6;--muted:#9ea3bf;--line:#2c3040;--brand:#8ca0ff}}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.45}
.top{display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 20px;background:var(--card);border-bottom:1px solid var(--line)}
.brand{font-weight:800;font-size:20px;color:var(--text);text-decoration:none}.brand span{font-weight:500;color:var(--muted);font-size:14px}
nav{display:flex;gap:16px;align-items:center}nav a{color:var(--brand);text-decoration:none;font-weight:600}
main{max-width:980px;margin:0 auto;padding:18px}
.card{background:var(--card);border-radius:18px;padding:18px 20px;margin:0 0 16px;box-shadow:0 1px 0 var(--line)}
.narrow{max-width:420px;margin:40px auto}
h1{margin:0 0 12px;font-size:24px}h2{margin:0 0 10px;font-size:18px}
label{display:block;margin:8px 0;font-weight:600;font-size:14px}
input,textarea{display:block;width:100%;margin-top:4px;padding:10px 12px;border-radius:12px;border:2px solid var(--line);background:var(--bg);color:var(--text);font:inherit}
input[type=radio],input[type=checkbox]{display:inline;width:auto;margin-right:6px}
button{font:inherit;font-weight:700;border:0;border-radius:999px;padding:10px 18px;background:var(--line);color:var(--text);cursor:pointer;margin-top:6px}
button.primary{background:var(--brand);color:#fff}button.danger{background:var(--danger);color:#fff}
button.link{background:none;padding:0;color:var(--brand);font-weight:600}button.link.danger,.danger{color:var(--danger)}
.note{padding:10px 14px;border-radius:12px;background:#e3e8ff;color:#1c2033}.note.ok{background:#e2f5ea}.note.err{background:#ffe2e3}
.muted{color:var(--muted);font-size:14px}.mono{word-break:break-all;font-family:ui-monospace,monospace}
.code{font-family:ui-monospace,monospace;letter-spacing:1px}
.on{color:var(--ok);font-weight:700}
table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:8px 6px;border-bottom:1px solid var(--line);vertical-align:top}
tr.off td{opacity:.55}
.tag{font-size:12px;padding:2px 8px;border-radius:999px;background:var(--line)}
.enroll{display:flex;gap:20px;align-items:center;flex-wrap:wrap}.enroll img{border-radius:12px;background:#fff;padding:6px}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end}.row label{flex:1;min-width:140px}.row label.check{flex:0}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;text-align:center}.stats b{display:block;font-size:28px}
details summary{cursor:pointer;color:var(--brand);font-weight:600}details form{margin:8px 0}
.accent{border:2px solid var(--kid)}
footer{text-align:center;color:var(--muted);font-size:13px;padding:20px}
.feedback{border-top:1px solid var(--line,#ddd);padding-top:8px}.pre{white-space:pre-wrap;word-break:break-word}