:root{--bg-main:#000;--bg-secondary:#0a0a0a;--bg-elevated:#111;--text-primary:#fff;--text-secondary:#888;--text-muted:#555;--border:#ffffff1a;--border-light:#ffffff0d;--accent:#ff5a36;--accent-hover:#e04a2c;--font-sans:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;--radius:8px;--spacing-base:8px;--nav-height:64px}[data-theme=light]{--bg-main:#fff;--bg-secondary:#fafafa;--bg-elevated:#f0f0f0;--text-primary:#000;--text-secondary:#666;--text-muted:#999;--border:#00000014;--border-light:#0000000a}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background-color:var(--bg-main);color:var(--text-primary);font-family:var(--font-sans);-webkit-font-smoothing:antialiased;font-weight:450;line-height:1.6;transition:background-color .4s,color .4s}h1,h2,h3{letter-spacing:-.04em;color:var(--text-primary);font-weight:600;line-height:1.05}p{color:var(--text-secondary);letter-spacing:-.01em;font-size:1.05rem}a{color:inherit;text-decoration:none;transition:opacity .2s}button{cursor:pointer;font-family:inherit;transition:all .2s}.btn-primary{background:var(--accent);border-radius:var(--radius);border:1px solid var(--accent);justify-content:center;align-items:center;padding:12px 28px;font-size:14px;font-weight:500;display:inline-flex;color:#fff!important}.btn-primary:hover{background:var(--accent-hover);border-color:var(--accent-hover);color:#fff!important}.btn-secondary{color:var(--text-primary);border-radius:var(--radius);border:1px solid var(--border);background:0 0;padding:12px 28px;font-size:14px;font-weight:500}.btn-secondary:hover{border-color:var(--text-primary)}.section-container{max-width:1100px;margin:0 auto;padding:100px 24px}.fade-in{animation:.6s ease-out forwards fadeIn}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}