:root{--primary:#4f46e5;--primary-dark:#4338ca;--bg:#f7f8fc;--surface:#ffffff;--text:#1a1b2e;--text-muted:#5c5e77;--border:#e3e5f0;--radius:12px;--shadow:0 4px 20px rgba(30,32,70,.08);--font-body:'Inter',sans-serif;--font-head:'Outfit',sans-serif}[data-theme=dark]{--bg:#0f1020;--surface:#181933;--text:#f1f2fb;--text-muted:#a3a5c2;--border:#2a2c4d;--shadow:0 4px 20px rgba(0,0,0,.4)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;transition:background .3s,color .3s}img{max-width:100%;display:block}a{color:inherit;text-decoration:none}h1,h2,h3,h4{font-family:var(--font-head);line-height:1.25}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}.container.narrow{max-width:840px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-body);font-weight:600;border-radius:10px;padding:13px 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