:root{
  --ink:#15242f; --muted:#5f7180; --line:#d0dae1; --accent:#0c6f7e; --gold:#9a6d17;
  --bg:#eef2f5; --card:#fff;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic UI",sans-serif;line-height:1.6}
.wrap{max-width:900px;margin:0 auto;padding:32px 20px 64px}
header.site{display:flex;align-items:baseline;gap:12px;border-bottom:1px solid var(--line);
  padding-bottom:14px;margin-bottom:28px}
header.site .logo{font-weight:700;font-size:18px}
h1{font-size:24px;margin:0 0 6px} h2{font-size:18px;margin:28px 0 10px}
.sub{color:var(--muted);margin:0 0 20px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;
  box-shadow:0 6px 18px rgba(20,40,55,.05)}
.card h3{margin:0 0 4px;font-size:16px}
.price{font-size:28px;font-weight:700;margin:8px 0}
.price small{font-size:14px;color:var(--muted);font-weight:400}
.btn{display:inline-block;background:var(--accent);color:#fff;border:0;border-radius:8px;
  padding:11px 18px;font-size:15px;text-decoration:none;cursor:pointer}
.btn.sec{background:#fff;color:var(--accent);border:1px solid var(--accent)}
.btn:disabled{opacity:.5;cursor:default}
label.opt{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:14px;margin:10px 0}
.note{background:#e0eef0;border:1px solid #b9dbe0;border-radius:10px;padding:12px 15px;font-size:14px;margin:16px 0}
.err{background:#fbe9e9;border:1px solid #eab8b8;color:#7d2b2b;border-radius:10px;padding:12px 15px;margin:16px 0}
.ok{background:#e7f4ec;border:1px solid #b6ddc5;color:#1f5b39;border-radius:10px;padding:12px 15px;margin:16px 0}
code.lic{font-family:ui-monospace,Consolas,monospace;font-size:18px;background:#f3f7f9;
  border:1px solid var(--line);border-radius:8px;padding:6px 12px;display:inline-block}
.muted{color:var(--muted);font-size:14px}