*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --teal: #008390;
  --teal-dark: #006470;
  --teal-light: #e1f5ee;
  --text: #1a1a1a;
  --text-muted: #555;
  --border: #ddd;
  --bg: #fff;
  --bg-secondary: #f8fafa;
  --radius: 8px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg-secondary);
}

header {
  background: var(--teal);
  padding: 1.25rem 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

header .logo-mark {
  width: 32px;
  height: 32px;
  background: rgba(255,255,255,0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

header a {
  color: #fff;
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

nav {
  background: var(--teal-dark);
  padding: 0 2rem;
  display: flex;
  gap: 0;
  overflow-x: auto;
}

nav a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 0.875rem;
  padding: 0.75rem 1rem;
  display: block;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 0.15s, border-color 0.15s;
}

nav a:hover { color: #fff; }
nav a.active { color: #fff; border-bottom-color: rgba(255,255,255,0.7); }

main {
  max-width: 760px;
  margin: 2.5rem auto;
  padding: 0 1.5rem 4rem;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem;
}

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--teal-dark);
  margin-bottom: 0.25rem;
  letter-spacing: -0.02em;
}

.meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin: 2rem 0 0.6rem;
}

p { margin-bottom: 1rem; color: var(--text-muted); }
p:last-child { margin-bottom: 0; }

a.inline { color: var(--teal); }
a.inline:hover { color: var(--teal-dark); }

ul, ol {
  margin: 0.5rem 0 1rem 1.5rem;
  color: var(--text-muted);
}

ul li, ol li { margin-bottom: 0.35rem; }

strong { color: var(--text); font-weight: 600; }

footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
}

footer a { color: var(--teal); text-decoration: none; }
footer a:hover { text-decoration: underline; }

.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.home-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  text-decoration: none;
  color: inherit;
  display: block;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.home-card:hover {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px var(--teal-light);
}

.home-card .icon {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.home-card h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--teal-dark);
  margin: 0 0 0.4rem;
}

.home-card p {
  font-size: 0.875rem;
  margin: 0;
}

.hero {
  text-align: center;
  padding: 2.5rem 1rem 1.5rem;
}

.hero h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.hero p { font-size: 1rem; max-width: 480px; margin: 0 auto 2rem; }

@media (max-width: 600px) {
  .card { padding: 1.5rem; }
  header, nav { padding-left: 1rem; padding-right: 1rem; }
  main { padding: 0 1rem 3rem; }
  .hero h1 { font-size: 1.5rem; }
}