:root {
  color-scheme: light;
  --bg: #f4fbfa;
  --surface: #ffffff;
  --surface-alt: #e8f6f3;
  --text: #0f172a;
  --muted: #475569;
  --line: #dbe7e5;
  --brand: #0f766e;
  --brand-strong: #115e59;
  --accent: #14b8a6;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, #f0fdfa 0%, #f8fafc 100%);
  line-height: 1.6;
}

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

.page {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 18px 56px;
}

.hero {
  background: linear-gradient(135deg, #0f766e 0%, #14b8a6 100%);
  color: #fff;
  border-radius: 24px;
  padding: 32px 24px;
  box-shadow: 0 18px 50px rgba(15, 118, 110, 0.18);
}

.hero h1,
.hero p {
  color: #fff;
}

.hero p {
  max-width: 700px;
}

.topnav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 18px 0 0;
}

.topnav a,
.button {
  display: inline-block;
  padding: 11px 16px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: #fff;
}

.topnav a.secondary,
.button.secondary {
  background: rgba(255, 255, 255, 0.12);
}

.topnav a.primary,
.button.primary {
  background: rgba(15, 23, 42, 0.16);
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
  margin-top: 20px;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.06);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
}

.tile {
  background: var(--surface-alt);
  border: 1px solid #d4ece7;
  border-radius: 18px;
  padding: 18px;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin-top: 0;
}

h1 {
  font-size: 2.1rem;
  margin-bottom: 10px;
}

h2 {
  font-size: 1.35rem;
  margin-bottom: 12px;
}

h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

p,
li {
  color: var(--muted);
}

ul,
ol {
  margin: 0 0 0 22px;
  padding: 0;
}

li + li {
  margin-top: 8px;
}

.eyebrow {
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #d1fae5;
  font-weight: 700;
}

.meta {
  font-size: 0.95rem;
  color: #64748b;
}

.footer {
  margin-top: 28px;
  color: #64748b;
  font-size: 0.95rem;
  text-align: center;
}

.notice {
  border-left: 4px solid var(--accent);
  background: #f0fdfa;
  padding: 14px 16px;
  border-radius: 14px;
  color: #134e4a;
}

code {
  background: #f1f5f9;
  padding: 1px 6px;
  border-radius: 6px;
  font-family: "Courier New", Courier, monospace;
  color: #0f172a;
}

@media (max-width: 640px) {
  .hero {
    padding: 28px 18px;
  }

  h1 {
    font-size: 1.75rem;
  }

  .card {
    padding: 20px;
  }
}