:root {
  color-scheme: light;
  --background: #eef1f4;
  --surface: #ffffff;
  --surface-muted: #f7f8fa;
  --border: #dce2ea;
  --text: #15181d;
  --muted: #68707d;
  --primary: #0f766e;
  --primary-dark: #0b5f59;
  --secondary: #0b1220;
  --accent: #0891b2;
  --danger: #b42318;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
}

body {
  background:
    radial-gradient(circle at top right, rgba(8, 145, 178, 0.16), transparent 34rem),
    radial-gradient(circle at bottom left, rgba(15, 118, 110, 0.12), transparent 28rem),
    var(--background);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.55;
  margin: 0;
  min-height: 100vh;
}

a {
  color: var(--primary-dark);
  font-weight: 700;
}

.page {
  margin: 0 auto;
  max-width: 960px;
  padding: 40px 20px 72px;
}

.nav {
  align-items: center;
  display: flex;
  gap: 18px;
  justify-content: space-between;
  margin-bottom: 56px;
}

.brand {
  align-items: center;
  color: var(--secondary);
  display: inline-flex;
  font-size: 1.25rem;
  font-weight: 900;
  gap: 12px;
  text-decoration: none;
}

.brand img,
.brand-mark {
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(11, 18, 32, 0.12);
  height: 44px;
  width: 44px;
}

.brand-mark {
  background:
    linear-gradient(145deg, transparent 44%, #ffffff 45%, #ffffff 55%, transparent 56%),
    radial-gradient(circle at 30% 72%, #0b1220 0 22%, transparent 23%),
    radial-gradient(circle at 66% 70%, #0891b2 0 24%, transparent 25%),
    radial-gradient(circle at 50% 28%, #0f766e 0 32%, transparent 33%),
    #ffffff;
  border: 1px solid rgba(11, 18, 32, 0.08);
  display: inline-block;
  flex: 0 0 auto;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.hero {
  margin-bottom: 36px;
}

.eyebrow {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  color: var(--secondary);
  line-height: 1.05;
  margin: 0;
}

h1 {
  font-size: clamp(2.75rem, 7vw, 5rem);
  letter-spacing: 0;
  max-width: 820px;
}

h2 {
  font-size: clamp(1.55rem, 4vw, 2.25rem);
  margin-top: 36px;
}

h3 {
  font-size: 1.12rem;
  margin-top: 24px;
}

p,
li {
  color: var(--muted);
  font-size: 1.03rem;
}

.lede {
  color: var(--muted);
  font-size: clamp(1.15rem, 3vw, 1.45rem);
  line-height: 1.35;
  margin: 20px 0 0;
  max-width: 780px;
}

.grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 30px;
}

.card,
.notice,
.content {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(11, 18, 32, 0.06);
}

.card {
  padding: 22px;
}

.card h2,
.card h3 {
  margin-top: 0;
}

.notice {
  border-color: rgba(217, 119, 6, 0.28);
  margin: 28px 0;
  padding: 18px 20px;
}

.notice strong {
  color: var(--secondary);
}

.content {
  padding: clamp(22px, 5vw, 44px);
}

.content > :first-child {
  margin-top: 0;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  align-items: center;
  background: var(--primary);
  border-radius: 10px;
  color: #ffffff;
  display: inline-flex;
  font-weight: 900;
  min-height: 44px;
  padding: 10px 18px;
  text-decoration: none;
}

.button.secondary {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--secondary);
}

.meta {
  color: var(--muted);
  font-size: 0.94rem;
  margin-top: 10px;
}

.footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  margin-top: 42px;
  padding-top: 24px;
}

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .page {
    padding-top: 24px;
  }
}