*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
       background: #0f172a; color: #e2e8f0; min-height: 100vh; }
.container { max-width: 1200px; margin: 0 auto; padding: 2rem; }
header { display: flex; justify-content: space-between; align-items: center;
         padding-bottom: 2rem; border-bottom: 1px solid #1e293b; }
h1 { font-size: 1.5rem; font-weight: 700; color: #38bdf8; }
nav a { color: #94a3b8; text-decoration: none; margin-left: 1.5rem; font-size: 0.9rem; }
nav a:hover { color: #38bdf8; }
.card { background: #1e293b; border-radius: 0.75rem; padding: 2rem; margin-top: 2rem;
        border: 1px solid #334155; }
h2 { font-size: 1.25rem; margin-bottom: 1rem; color: #f1f5f9; }
p { color: #94a3b8; line-height: 1.6; margin-bottom: 0.5rem; }