@keyframes pulse{0%{transform:scale(1);opacity:1}50%{transform:scale(1.05);opacity:.9}to{transform:scale(1);opacity:1}}.btn{background:#3b82f6;color:#fff;transition:all .3s ease}.btn:hover{animation:pulse 2s infinite;background:#2563eb}:root{--bg:#0f172a;--card:#0b1224;--ink:#e6edf6;--muted:#94a3b8;--line:#1f2a44;--brand:#32b5f3}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,Inter}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1120px;margin:0 auto;padding:24px}.nav{display:flex;gap:14px;margin:8px 0 20px}.nav a{padding:6px 10px;border-radius:10px;background:rgba(50,181,243,.1);border:1px solid rgba(50,181,243,.2)}h1,h2{margin:0 0 6px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px}.btn{background:var(--brand);color:#00243a;border:0;border-radius:12px;padding:10px 14px;cursor:pointer;font-weight:600}