:root{--bg:#0b0b0b;--ink:#eaeaea;--muted:#9b9b9b;--gold:#d4af37;--card:#111}*{box-sizing:border-box}body,html{height:100%}body{margin:0;font:14px/1.6 ui-sans-serif,-apple-system,Segoe UI,Roboto,Helvetica,Arial;background:radial-gradient(1200px 600px at 20% -10%,#1b1317 0,var(--bg) 45%)}a,body{color:var(--ink)}a{text-decoration:none}.container{max-width:840px;margin:40px auto;padding:24px}.card{background:var(--card);border:1px solid rgba(212,175,55,.25);border-radius:16px;padding:24px;box-shadow:0 10px 30px rgba(0,0,0,.45)}.h1{font-size:28px;font-weight:700;letter-spacing:.3px;margin:0 0 12px}.sub{color:var(--muted);margin:6px 0 18px}.btn{display:inline-block;padding:10px 14px;border-radius:12px;border:1px solid var(--gold);color:var(--gold);font-weight:600}.input{width:100%;background:#0f0f0f;border:1px solid #222;color:var(--ink);border-radius:10px;padding:12px}.row{display:grid;grid-gap:12px;gap:12px}.error{color:#ff6b6b;margin-top:10px}.topnav{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 0;margin:0 auto;max-width:840px}.brand{font-weight:700;letter-spacing:.4px}.tag{color:var(--muted);font-style:italic}.rule{height:1px;background:linear-gradient(90deg,var(--gold),transparent);margin:16px 0 24px}