:root {
  --brand: #0097a7;
  --brand-dark: #00838f;
  --ink: #1a2332;
  --ink-soft: #4b5563;
  --bg: #f7fafb;
  --border: #e2e8ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

header {
  background: linear-gradient(120deg, var(--brand-dark), var(--brand));
  color: #fff;
  padding: 28px 20px;
}

header .brand {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

header .brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  flex-shrink: 0;
}

header h1 {
  font-size: 20px;
  margin: 0;
}

header p {
  margin: 2px 0 0;
  font-size: 13px;
  opacity: 0.9;
}

nav {
  max-width: 760px;
  margin: 14px auto 0;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

nav a {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
}

nav a:hover,
nav a.active {
  border-bottom-color: #fff;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 36px 20px 64px;
}

h2 {
  font-size: 22px;
  margin-top: 40px;
  margin-bottom: 10px;
}

h2:first-child {
  margin-top: 0;
}

h3 {
  font-size: 16px;
  margin-top: 24px;
  margin-bottom: 8px;
}

p,
li {
  color: var(--ink-soft);
  font-size: 15px;
}

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

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  margin-bottom: 18px;
}

.card h3 {
  margin-top: 0;
  color: var(--ink);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.updated {
  font-size: 13px;
  color: #94a3b8;
  margin-bottom: 28px;
}

.pill {
  display: inline-block;
  background: rgba(0, 151, 167, 0.1);
  color: var(--brand-dark);
  border-radius: 999px;
  padding: 3px 12px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px 48px;
  color: #94a3b8;
  font-size: 13px;
}

footer a {
  color: #94a3b8;
}

.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 10px;
}