:root { color-scheme: light; }
* { box-sizing: border-box; }
body { margin:0; font:16px/1.4 system-ui, -apple-system, Segoe UI, Roboto, Arial; color:#111; background:#fafafa; }
a { color: inherit; }
.wrap { max-width: 980px; margin: 0 auto; padding: 18px 18px; }
header { display:flex; align-items:center; justify-content:space-between; position:sticky; top:0; background:#fafafa; border-bottom:1px solid #eee; z-index:10; }
.brand { font-weight:800; letter-spacing: .5px; }
.nav a { margin-left: 14px; text-decoration:none; color:#444; }
.nav a:hover { color:#000; }

.hero { padding: 26px 0 10px; }
.hero h1 { font-size: 38px; margin: 0 0 10px; }
.sub { font-size: 18px; color:#333; margin:0 0 16px; max-width: 760px; }
.note { color:#666; font-size: 13px; margin-top: 12px; }

.btn { display:inline-block; padding: 10px 14px; border-radius: 10px; border:1px solid #111; background:#111; color:#fff; text-decoration:none; cursor:pointer; }
.btn.ghost { background:transparent; color:#111; }
.btn:disabled { opacity:.5; cursor:not-allowed; }

.cta { display:flex; gap:10px; flex-wrap:wrap; }

.card { background:#fff; border:1px solid #eaeaea; border-radius: 14px; padding: 16px; box-shadow: 0 1px 0 rgba(0,0,0,.02); }
.grid3 { display:grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 18px 0; }
.grid2 { display:grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
@media (max-width: 760px) { .grid3, .grid2 { grid-template-columns: 1fr; } .hero h1 { font-size: 30px; } }

.demo { margin-top: 12px; }
.row { display:flex; gap: 10px; align-items:center; flex-wrap:wrap; margin: 10px 0; }
.status { margin-top: 8px; font-size: 14px; color:#333; }
.muted { color:#666; }

.hidden { display:none; }

.pdfwrap { height: 560px; border:1px solid #eee; border-radius: 12px; overflow:hidden; background:#f6f6f6; }
iframe { width:100%; height:100%; border:0; }

fieldset { border:1px solid #eee; border-radius: 12px; padding: 10px; margin: 12px 0; }
legend { padding: 0 6px; color:#333; }
label { display:block; margin: 8px 0; color:#222; }
input[type="text"], input[type="email"], select, textarea {
  width:100%; padding: 10px; border-radius: 10px; border:1px solid #ddd; background:#fff;
}

.foot { display:flex; justify-content:space-between; padding: 18px 0 30px; color:#444; }