:root{
  --fg:#111827;
  --muted:#6b7280;
  --line:#e5e7eb;
  --bg:#ffffff;
  --soft:#fafafa;
  --card:#ffffff;
  --radius:16px;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", sans-serif;
  color:var(--fg);
  background:var(--bg);
}
a{color:inherit}
.container{max-width:980px;margin:0 auto;padding:28px 18px 80px}
.header{display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{font-weight:800}
.brand-link{text-decoration:none}
.nav{display:flex;gap:14px;font-size:14px;flex-wrap:wrap}
.nav a{text-decoration:none;color:var(--fg)}
.small{font-size:12px}
.muted{color:var(--muted)}
.hero{
  border:1px solid var(--line);
  border-radius:24px;
  padding:28px;
  background:linear-gradient(180deg,#fff 0%, var(--soft) 100%);
  margin-top:28px;
}
.hero h1{margin:10px 0;font-size:34px;letter-spacing:-0.02em}
.lead{line-height:1.9;color:#374151;margin:0 0 18px}
.actions{display:flex;gap:10px;flex-wrap:wrap}
.btn{
  display:inline-block;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  text-decoration:none;
  background:#fff;
  font-size:14px;
}
.btn.primary{
  background:var(--fg);
  color:#fff;
  border-color:var(--fg);
}
.btn[disabled], button.btn[disabled]{opacity:0.6;cursor:not-allowed}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px}
.card{
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px;
  background:var(--card);
}
.card h1{margin-top:0}
.card h2{margin-top:22px}
.table{width:100%;border-collapse:collapse}
.table th{width:220px;text-align:left;color:var(--muted);vertical-align:top}
.table th,.table td{padding:10px 8px;border-top:1px solid #f3f4f6}
.footer{margin-top:60px;padding-top:18px;border-top:1px solid #f3f4f6}
.footer-links{display:flex;gap:14px;flex-wrap:wrap;font-size:14px;margin-bottom:10px}
.field{display:grid;gap:6px;margin:12px 0}
.field span{color:var(--muted);font-size:13px}
input,textarea{
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--line);
  font:inherit;
}
.msg{margin-top:10px}
.msg.ok{color:#065f46}
.msg.ng{color:#991b1b}
.hp{position:absolute;left:-9999px;top:-9999px}