:root{--bg: #f4f6f6;--card: #ffffff;--ink: #12201f;--muted: #5b6b6a;--accent: #0f766e;--line: #d6dddc}@media (prefers-color-scheme: dark){:root{--bg: #0e1514;--card: #162120;--ink: #e6efee;--muted: #9bb0ae;--accent: #2dd4bf;--line: #28403d}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.cartao{max-width:420px;margin:8vh auto;padding:24px 16px}h1{font-size:1.5rem;margin:0 0 4px}.sub{color:var(--muted);margin:0 0 20px}form{display:grid;gap:14px}label{display:grid;gap:4px;font-size:.9rem;color:var(--muted)}input{font:inherit;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink)}button{font:inherit;padding:10px 14px;border:0;border-radius:8px;background:var(--accent);color:#fff;cursor:pointer}@media (prefers-color-scheme: dark){button{color:#04201d}}button:disabled{opacity:.6}button.link{background:none;color:var(--accent);padding:12px 0;text-decoration:underline}.msg{color:var(--muted);border-left:3px solid var(--accent);padding-left:10px}