:root{--bg:#fbfaf7;--fg:#1d2329;--muted:#5d6670;--line:#dcd8cf;--card:#ffffff;--accent:#2f5d8a;--err:#b3261e;--ok:#2e6b45}
@media (prefers-color-scheme:dark){:root{--bg:#14181c;--fg:#e8eaed;--muted:#9aa3ad;--line:#2c333a;--card:#1b2026;--accent:#8fb8e0;--err:#f2b8b5;--ok:#8fd1a6;color-scheme:dark}}
*{box-sizing:border-box}html,body{margin:0}
body{background:var(--bg);color:var(--fg);font-family:"Hiragino Sans","Yu Gothic",system-ui,sans-serif;font-size:16px;line-height:1.8}
.in{max-width:680px;margin:0 auto;padding:0 16px}
.top{border-bottom:1px solid var(--line)}.top .in{padding:14px 16px}.logo{font-weight:700;letter-spacing:.06em}
.hero{padding:48px 0 24px}h1{font-size:30px;margin:0 0 8px;letter-spacing:.04em}.lead{color:var(--muted);margin:0}
h2{font-size:19px;margin:32px 0 10px}section p{margin:0 0 12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:4px 18px 18px;margin-top:24px}
.ai{font-size:14px;color:var(--muted);border-left:3px solid var(--accent);padding-left:10px}
form{display:flex;flex-direction:column;gap:14px}
label{display:flex;flex-direction:column;gap:4px;font-size:14px;font-weight:600}
input,select,textarea{font:inherit;font-weight:400;padding:9px 10px;border:1px solid var(--line);border-radius:6px;background:var(--bg);color:var(--fg);width:100%}
input:focus,select:focus,textarea:focus,button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.count{font-weight:400;font-size:12px;color:var(--muted);align-self:flex-end}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
button{font:inherit;font-weight:700;padding:10px 18px;border:0;border-radius:6px;background:var(--accent);color:var(--bg);cursor:pointer;align-self:flex-start}
button[disabled]{opacity:.6;cursor:wait}
#msg{min-height:1.5em;margin:0}#msg.err{color:var(--err)}#msg.ok{color:var(--ok)}
.svc{margin:0;padding-left:1.2em}
.foot{color:var(--muted);font-size:13px;padding-top:40px;padding-bottom:40px}