:root {
  --bg: #f7f8fa;
  --card: #ffffff;
  --ink: #1d2433;
  --muted: #5b6475;
  --line: #e3e7ee;
  --brand: #0f7b5f;
  --brand-dark: #0a5c47;
  --accent: #ff7a3d;
  --radius: 14px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

a { color: var(--brand); }
a:hover { color: var(--brand-dark); }

.wrap { max-width: 980px; margin: 0 auto; padding: 0 22px; }

header.site {
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
}
.logo {
  font-weight: 800;
  font-size: 20px;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.3px;
}
.logo span { color: var(--brand); }
nav a {
  margin-left: 18px;
  font-size: 15px;
  color: var(--muted);
  text-decoration: none;
}
nav a:hover { color: var(--ink); }

.hero {
  padding: 72px 0 56px;
  background: linear-gradient(160deg, #e9f6f1 0%, #f7f8fa 60%);
}
.hero h1 {
  font-size: 44px;
  line-height: 1.12;
  margin: 0 0 16px;
  letter-spacing: -1px;
}
.hero p.lead {
  font-size: 20px;
  color: var(--muted);
  max-width: 680px;
  margin: 0 0 28px;
}
.badge {
  display: inline-block;
  background: #fff3ec;
  color: #b4471a;
  border: 1px solid #ffd7c2;
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 18px;
}
.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  padding: 13px 22px;
  border-radius: 10px;
  font-weight: 700;
  text-decoration: none;
}
.btn:hover { background: var(--brand-dark); color: #fff; }
.btn.ghost {
  background: transparent;
  color: var(--brand);
  border: 2px solid var(--brand);
  margin-left: 10px;
}

section { padding: 56px 0; }
section h2 {
  font-size: 30px;
  margin: 0 0 10px;
  letter-spacing: -0.5px;
}
section p.sub { color: var(--muted); margin: 0 0 28px; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 18px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.card .icon { font-size: 28px; }
.card h3 { margin: 8px 0 6px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15.5px; }

.devices { display: flex; flex-wrap: wrap; gap: 12px; }
.device {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 600;
}
.device small { display: block; font-weight: 400; color: var(--muted); }

.notice {
  background: #fffbea;
  border: 1px solid #f3e3a1;
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: 15.5px;
}

footer.site {
  border-top: 1px solid var(--line);
  background: var(--card);
  padding: 28px 0;
  font-size: 14.5px;
  color: var(--muted);
}
footer.site a { color: var(--muted); margin-right: 16px; }
footer.site p { margin: 6px 0; }

/* Legal pages */
.legal { background: var(--card); }
.legal .wrap { max-width: 820px; }
.legal h1 { font-size: 34px; margin: 40px 0 6px; letter-spacing: -0.5px; }
.legal .updated { color: var(--muted); margin: 0 0 26px; }
.legal h2 { font-size: 22px; margin: 34px 0 10px; }
.legal h3 { font-size: 18px; margin: 22px 0 8px; }
.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 18px;
  font-size: 15px;
}
.legal th, .legal td {
  border: 1px solid var(--line);
  padding: 9px 11px;
  text-align: left;
  vertical-align: top;
}
.legal th { background: #f1f4f8; }
.legal .toc {
  background: #f7f8fa;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 22px;
  font-size: 15.5px;
}
.legal .toc ol { margin: 6px 0; padding-left: 20px; }

.todo {
  background: #fff2a8;
  border-radius: 4px;
  padding: 0 4px;
  font-weight: 600;
}

@media (max-width: 640px) {
  .hero h1 { font-size: 32px; }
  .hero p.lead { font-size: 18px; }
  nav a { margin-left: 12px; font-size: 14px; }
  .btn.ghost { margin: 10px 0 0; }
}