:root{--text:#18181b;--muted:#71717a;--border:#e4e4e7;--surface:#f4f4f5;--accent:#f43f5e;--accent-hover:#e11d48;--bg:#fff}*{box-sizing:border-box}body{background:var(--bg);min-height:100vh;color:var(--text);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif}.center{place-items:center;min-height:100vh;padding:24px 16px;display:grid}.card{text-align:center;flex-direction:column;gap:12px;width:100%;max-width:400px;display:flex}.card h1{margin:0;font-size:22px}.card p{color:var(--muted);margin:0;line-height:1.5}.btn{border:1px solid var(--accent);background:var(--accent);color:#fff;height:44px;font:inherit;cursor:pointer;border-radius:8px;justify-content:center;align-items:center;padding:0 20px;font-weight:500;text-decoration:none;display:inline-flex}.btn:hover{background:var(--accent-hover)}.btn:disabled{opacity:.6;cursor:default}.ok{color:#16a34a!important}.err{color:#dc2626!important}