*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #4f46e5;--primary-dark: #4338ca;--bg: #f0f2f5;--card: #ffffff;--text: #111827;--muted: #6b7280;--border: #e5e7eb;--danger: #dc2626;--radius: 12px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.65rem 1.25rem;border-radius:8px;border:none;font-size:.9375rem;font-weight:600;cursor:pointer;transition:background .15s,opacity .15s}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-dark)}.btn-ghost{background:var(--card);color:var(--text);border:1.5px solid var(--border)}.btn-ghost:hover:not(:disabled){background:var(--bg)}.btn-danger{background:#fef2f2;color:var(--danger);border:1.5px solid #fecaca}.btn-danger:hover:not(:disabled){background:#fee2e2}.card{background:var(--card);border-radius:var(--radius);box-shadow:0 1px 16px #00000012;padding:1.75rem}.spinner{width:40px;height:40px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite;margin:2rem auto}@keyframes spin{to{transform:rotate(360deg)}}