:root {
  --primary: #1a365d;
  --primary-light: #2c5282;
  --accent: #2b6cb0;
  --text: #1a202c;
  --text-light: #4a5568;
  --bg: #ffffff;
  --bg-alt: #f7fafc;
  --border: #e2e8f0;
  --success: #276749;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--bg);
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

header {
  background: var(--primary);
  color: white;
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

header .container { display: flex; justify-content: space-between; align-items: center; }

.logo { color: white; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.5px; }
.logo span { color: #90cdf4; }

nav a {
  color: white;
  text-decoration: none;
  margin-left: 28px;
  font-weight: 500;
  font-size: 0.95rem;
}
nav a:hover { color: #90cdf4; }

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: white;
  padding: 80px 0;
  text-align: center;
}

.hero h1 { font-size: 2.8rem; margin-bottom: 16px; font-weight: 700; }
.hero p { font-size: 1.25rem; max-width: 700px; margin: 0 auto 32px; opacity: 0.95; }

.btn {
  display: inline-block;
  background: white;
  color: var(--primary);
  padding: 14px 32px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.2s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }

.section { padding: 70px 0; }
.section h2 { font-size: 2rem; margin-bottom: 12px; color: var(--primary); }
.section .subtitle { color: var(--text-light); margin-bottom: 40px; font-size: 1.1rem; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; }

.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
}
.card:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.08); transform: translateY(-3px); }

.card-body { padding: 24px; }
.card h3 { font-size: 1.2rem; margin-bottom: 10px; color: var(--primary); }
.card p { color: var(--text-light); font-size: 0.95rem; margin-bottom: 16px; }
.card a { color: var(--accent); font-weight: 600; text-decoration: none; }
.card a:hover { text-decoration: underline; }

.post-meta { font-size: 0.85rem; color: #4a5568; margin-bottom: 8px; }

footer {
  background: var(--primary);
  color: white;
  padding: 40px 0 20px;
  margin-top: 60px;
}
footer .container { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; }
footer .footer-heading { font-weight: 700; color: inherit; margin-bottom: 12px; font-size: 1.05rem; }
footer a { color: #cbd5e0; text-decoration: none; display: block; margin-bottom: 8px; font-size: 0.9rem; }
footer a:hover { color: white; }
.copyright { text-align: center; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); margin-top: 30px; font-size: 0.85rem; opacity: 0.8; }

.article { max-width: 760px; margin: 40px auto; }
.article h1 { font-size: 2.2rem; margin-bottom: 12px; color: var(--primary); line-height: 1.3; }
.article .meta { color: #4a5568; margin-bottom: 28px; font-size: 0.95rem; }
.article h2 { font-size: 1.5rem; margin: 32px 0 12px; color: var(--primary); }
.article h3 { font-size: 1.2rem; margin: 24px 0 10px; }
.article p { margin-bottom: 16px; }
.article ul, .article ol { margin: 16px 0 16px 24px; }
.article li { margin-bottom: 8px; }
.article blockquote {
  border-left: 4px solid var(--accent);
  padding: 12px 20px;
  margin: 24px 0;
  background: var(--bg-alt);
  font-style: italic;
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  nav a { margin-left: 16px; font-size: 0.85rem; }
  .section { padding: 50px 0; }
}
.article .meta a { color: inherit; }
.author-box { margin: 40px 0 24px; padding: 20px 24px; background: var(--bg-alt); border-radius: 8px; border-left: 4px solid var(--accent); }
.author-box h3 { margin: 0 0 8px; font-size: 1.05rem; }
.author-box p { margin: 0; }
.related h2 { font-size: 1.3rem; }
.related ul { margin-left: 20px; }

/* images */
.hero-img { margin: 0 0 28px; }
.hero-img img, .card-img { display: block; width: 100%; height: auto; border-radius: 8px; }
.hero-photo { margin-top: 40px; max-width: 900px; }
.card-img { border-radius: 8px 8px 0 0; aspect-ratio: 3 / 2; object-fit: cover; }
.credit { font-size: 0.8rem; color: #4a5568; margin-top: 6px; }
.credit a { color: inherit; }
.card h3 a { color: inherit; text-decoration: none; }

header nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px 0; }
@media (max-width: 760px) { header .container { flex-direction: column; gap: 8px; } nav a { margin: 0 10px; } }