* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; line-height: 1.7; color: #333; background: #f8f9fa; }
.main-nav { background: #1a1a2e; color: white; padding: 1rem 2rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; }
.main-nav a { color: #e0e0e0; text-decoration: none; }
.main-nav a:hover { color: #00d4ff; }
.logo a { font-size: 1.3rem; font-weight: 700; color: white !important; }
.nav-menu { list-style: none; display: flex; gap: 1.5rem; flex-wrap: wrap; }
main { max-width: 900px; margin: 2rem auto; padding: 0 1.5rem; }
article { background: white; padding: 2.5rem; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
h1 { font-size: 2rem; margin-bottom: 1rem; color: #1a1a2e; }
h2 { font-size: 1.5rem; margin: 2rem 0 1rem; color: #16213e; border-bottom: 2px solid #00d4ff; padding-bottom: 0.3rem; }
h3 { font-size: 1.2rem; margin: 1.5rem 0 0.8rem; color: #333; }
p { margin-bottom: 1rem; }
ul, ol { margin: 1rem 0 1rem 1.5rem; }
li { margin-bottom: 0.5rem; }
a { color: #0066cc; }
.intro { font-size: 1.1rem; color: #555; border-left: 4px solid #00d4ff; padding-left: 1rem; margin-bottom: 2rem; }
.gt1-resources { margin-top: 2rem; padding: 1.5rem; background: #f0f7ff; border-radius: 6px; }
.gt1-resources h3 { color: #0066cc; margin-top: 0; }
.gt1-resources ul { list-style: none; margin-left: 0; }
.gt1-resources li { margin-bottom: 0.3rem; }
footer { background: #1a1a2e; color: #ccc; padding: 2rem; margin-top: 3rem; }
.footer-content { max-width: 900px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 2rem; }
.footer-section h4 { color: white; margin-bottom: 0.5rem; }
.footer-section ul { list-style: none; }
.footer-section a { color: #aaa; text-decoration: none; font-size: 0.9rem; }
.footer-section a:hover { color: #00d4ff; }
img { max-width: 100%; height: auto; border-radius: 4px; margin: 1rem 0; }
.caption { font-size: 0.85rem; color: #888; margin-top: -0.5rem; }
