:root{--bg:#f8fafc;--accent:#0ea5a4;--text:#0f172a}body,html{padding:0;margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;background:var(--bg);color:var(--text)}.container{max-width:980px;margin:32px auto;padding:0 16px}.nav{display:flex;justify-content:space-between;align-items:center;padding:16px 32px;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.06)}.nav .brand a{font-weight:700;color:var(--accent);text-decoration:none}.links a{margin-left:16px;text-decoration:none;color:var(--text)}.hero{padding:48px 0}.footer{text-align:center;padding:24px 0;color:#64748b}form input{padding:8px;margin:6px 0;width:100%;max-width:360px}form button{padding:10px 16px;background:var(--accent);color:#fff;border:none;border-radius:6px}.chatbox{position:fixed;right:20px;bottom:20px;width:320px;background:#fff;padding:12px;box-shadow:0 8px 24px rgba(2,6,23,.08);border-radius:8px}