:root{color-scheme:light dark;--bg:#f6f7f9;--card:#fff;--text:#1f2328;--muted:#59636e;--line:#d0d7de;--brand:#0b5d7a;--bad:#b42318;--focus:#0969da}
@media (prefers-color-scheme:dark){:root{--bg:#0d1117;--card:#161b22;--text:#e6edf3;--muted:#9198a1;--line:#30363d;--brand:#58a6ff;--bad:#f85149;--focus:#58a6ff}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,-apple-system,"Segoe UI",sans-serif}
main{max-width:40rem;margin:0 auto;padding:24px 16px 64px}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:24px}
.org{color:var(--muted);font-size:14px;margin:0 0 8px}h1{font-size:1.6rem;line-height:1.25;margin:0 0 12px}h2{font-size:1.15rem;margin:28px 0 4px}
.intro{color:var(--muted);margin-bottom:8px}.field{margin:20px 0}.field>label,.field legend{display:block;font-weight:600;margin-bottom:4px}
fieldset{border:0;padding:0;margin:0}.help{color:var(--muted);font-size:14px;margin:0 0 6px}.req{color:var(--bad)}
input[type=text],input[type=email],input[type=tel],input[type=date],textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--text);font:inherit}
textarea{min-height:8rem;resize:vertical}input:focus,textarea:focus{outline:2px solid var(--focus);outline-offset:1px}
.choice{display:flex;gap:10px;align-items:flex-start;margin:6px 0;font-weight:400}.choice input{margin-top:4px;width:18px;height:18px;flex:none}
.error{color:var(--bad);font-size:14px;margin:4px 0 0}[aria-invalid=true]{border-color:var(--bad)!important}
.notice{border:1px solid var(--bad);border-radius:8px;padding:12px;margin:16px 0}.notice.info{border-color:var(--line)}
button{margin-top:24px;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:12px 20px;font:inherit;font-weight:600;cursor:pointer}
button:focus{outline:2px solid var(--focus);outline-offset:2px}.hp{position:absolute;left:-10000px;top:auto;width:1px;height:1px;overflow:hidden}
.foot{color:var(--muted);font-size:13px;margin-top:20px}.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}