:root{--brand: #0D9488;--gray-50: #f9fafb;--gray-200: #e5e7eb;--gray-500: #6b7280;--gray-800: #1f2937;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--gray-800)}*{box-sizing:border-box}body{margin:0;background:var(--gray-50)}.page{max-width:920px;margin:0 auto;padding:32px 20px}.card{background:#fff;border:1px solid var(--gray-200);border-radius:12px;padding:24px}.muted{color:var(--gray-500)}.btn{display:inline-block;background:var(--brand);color:#fff;border:none;padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;text-decoration:none}.center{min-height:100vh;display:flex;align-items:center;justify-content:center}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}