:root{--bg: #0d1117;--bg-alt: #0f172a;--card: #161b22;--border: #21262d;--text: #e6edf3;--muted: #7d8590;--accent: #4493f8;--accent-light: #79b8ff;--green: #3fb950;--purple: #a371f7;--radius: 12px;--nav-height: 64px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background-color:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none;cursor:pointer}.container{max-width:1100px;margin:0 auto;padding:0 1.5rem}section{padding:5rem 0}.section-title{font-size:2rem;font-weight:700;margin-bottom:.5rem;background:linear-gradient(135deg,var(--text),var(--accent-light));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.section-subtitle{color:var(--muted);margin-bottom:3rem;font-size:1rem}@media(max-width:768px){section{padding:3rem 0}.section-title{font-size:1.6rem}}