*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--color-bg:#f8fafc;--color-surface:#ffffff;--color-border:#e2e8f0;--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-text:#1e293b;--color-text-muted:#64748b;--color-error:#dc2626;--color-success:#16a34a;--radius:8px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--color-bg);color:var(--color-text);line-height:1.6;min-height:100vh}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:480px;margin:0 auto;padding:2rem 1rem}.card{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius);padding:2rem;box-shadow:0 1px 3px rgba(0,0,0,.06)}h1{font-size:1.5rem;font-weight:700;margin-bottom:.5rem}h2{font-size:1.25rem;font-weight:600}h2,p{margin-bottom:1rem}p{color:var(--color-text-muted)}.form-group{display:flex;flex-direction:column;gap:.25rem;margin-bottom:1rem}label{font-size:.875rem;font-weight:500}input,label{color:var(--color-text)}input{width:100%;padding:.625rem .75rem;border:1px solid var(--color-border);border-radius:var(--radius);font-size:1rem;background:var(--color-surface);transition:border-color .15s}input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}button[type=submit]{width:100%;padding:.75rem;background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius);font-size:1rem;font-weight:600;cursor:pointer;margin-top:.5rem;transition:background .15s}button[type=submit]:hover:not(:disabled){background:var(--color-primary-hover)}button[type=submit]:disabled{opacity:.6;cursor:not-allowed}.alert{padding:.75rem 1rem;border-radius:var(--radius);font-size:.9rem;margin-top:1rem}.alert-error{background:#fef2f2;border:1px solid #fecaca;color:var(--color-error)}.alert-success{background:#f0fdf4;border:1px solid #bbf7d0;color:var(--color-success)}.json-block{background:#1e293b;color:#e2e8f0;border-radius:var(--radius);padding:1rem;font-family:Courier New,Courier,monospace;font-size:.85rem;overflow-x:auto;white-space:pre-wrap;word-break:break-all;margin-top:1rem}.hero{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;text-align:center;gap:1rem}.hero h1{font-size:2rem}.btn-primary{display:inline-block;padding:.75rem 1.5rem;background:var(--color-primary);color:#fff;border-radius:var(--radius);font-weight:600;font-size:1rem;transition:background .15s}.btn-primary:hover{background:var(--color-primary-hover);text-decoration:none}.spinner{display:inline-block;width:1rem;height:1rem;border:2px solid rgba(255,255,255,.5);border-top-color:#fff;border-radius:50%;animation:spin .6s linear infinite;margin-right:.5rem;vertical-align:middle}@keyframes spin{to{transform:rotate(1turn)}}.divider{border:none;border-top:1px solid var(--color-border);margin:1.5rem 0}.text-muted{color:var(--color-text-muted);font-size:.875rem}.mt-4{margin-top:1rem}.section-title{font-size:1rem;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em;margin-bottom:.5rem}