:root{--bg:#0a0a0a;--fg:#ededed;--muted:#888;--card:#141414;--border:#262626;--accent:#3b82f6}*{box-sizing:border-box}html,body{background:var(--bg);color:var(--fg);margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}main{max-width:640px;margin:0 auto;padding:4rem 1.5rem}h1{margin:0 0 .5rem;font-size:2rem}.subtitle{color:var(--muted);margin:0 0 2.5rem}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;margin-bottom:.75rem;padding:1rem 1.25rem}.badge{border:1px solid var(--border);color:var(--muted);border-radius:999px;padding:.2rem .6rem;font-size:.8rem;display:inline-block}.btn{border:1px solid var(--border);background:var(--accent);color:#fff;cursor:pointer;border-radius:8px;margin-top:.75rem;padding:.55rem 1rem;font-size:.9rem;font-weight:500;text-decoration:none;display:inline-block}.btn:disabled{opacity:.6;cursor:default}.ok{color:#22c55e;border-color:#14532d}.error{color:#ef4444;border-color:#7f1d1d}