:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --line: #e2e8f0;
  --brand: #0f766e;
  --brand-dark: #115e59;
  --maxw: 900px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 500px at 100% -10%, #d1fae5 0%, transparent 55%),
    radial-gradient(900px 500px at -10% -30%, #e0f2fe 0%, transparent 55%),
    var(--bg);
  line-height: 1.6;
}

.site {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 14px;
}

.brand {
  font-weight: 700;
  color: var(--brand-dark);
  letter-spacing: 0.2px;
}

.nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nav a {
  text-decoration: none;
  color: var(--brand-dark);
  border: 1px solid #bae6fd;
  background: #ecfeff;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 13px;
}

.policy {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 26px;
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.08);
}

h1, h2, h3 {
  line-height: 1.28;
  margin: 0 0 12px;
}
h1 {
  font-size: 34px;
  margin-bottom: 18px;
  color: #064e3b;
}
h2 {
  font-size: 22px;
  margin-top: 28px;
  color: #0f172a;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}
h3 {
  font-size: 18px;
  margin-top: 18px;
  color: #1e293b;
}

p {
  margin: 0 0 14px;
  color: #0f172a;
}

ul {
  margin: 0 0 14px 20px;
  padding: 0;
}
li { margin: 0 0 7px; }

strong { color: #0b3b33; }
code {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 1px 5px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.95em;
}

.footer {
  color: var(--muted);
  font-size: 13px;
  margin-top: 12px;
  padding: 10px 2px 18px;
}

.notice {
  border: 1px solid #fcd34d;
  background: #fffbeb;
  color: #78350f;
  border-radius: 10px;
  padding: 10px 12px;
  margin-top: 12px;
}

@media (max-width: 720px) {
  .site { padding: 14px; }
  .policy { padding: 18px; border-radius: 12px; }
  h1 { font-size: 28px; }
  h2 { font-size: 20px; }
}