:root{--primary-color: #2563eb;--text-color: #1f2937;--bg-color: #f3f4f6;--card-bg: #ffffff}body{font-family:Inter,system-ui,-apple-system,sans-serif;line-height:1.6;color:var(--text-color);background-color:var(--bg-color);margin:0;padding:2rem}header{background:var(--card-bg);padding:1.5rem;border-radius:12px;box-shadow:0 4px 6px -1px #0000001a;margin-bottom:2rem}nav ul{list-style:none;padding:0;display:flex;gap:1rem}nav a{text-decoration:none;color:var(--primary-color);font-weight:600}.content{background:var(--card-bg);padding:2rem;border-radius:12px;box-shadow:0 4px 6px -1px #0000001a;max-width:800px;margin:0 auto}