*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:#f3f4f6;color:#111827;min-height:100vh}.container{max-width:640px;margin:0 auto;padding:0 16px}.card{background:#fff;border-radius:12px;padding:32px;box-shadow:0 1px 3px #0000001a,0 1px 2px #0000000f}.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;border-radius:6px;border:none;font-size:15px;font-weight:500;cursor:pointer;transition:background .15s,opacity .15s}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:#2563eb;color:#fff}.btn-primary:hover:not(:disabled){background:#1d4ed8}.btn-secondary{background:#e5e7eb;color:#374151}.btn-secondary:hover:not(:disabled){background:#d1d5db}.btn-danger{background:#dc2626;color:#fff}.btn-danger:hover:not(:disabled){background:#b91c1c}.btn-full{width:100%}.form-group{margin-bottom:20px}.form-label{display:block;font-size:14px;font-weight:500;color:#374151;margin-bottom:6px}.form-input{width:100%;padding:10px 14px;border:1.5px solid #d1d5db;border-radius:6px;font-size:15px;transition:border-color .15s;outline:none}.form-input:focus{border-color:#2563eb}.form-input.error{border-color:#dc2626}.form-error{color:#dc2626;font-size:12px;margin-top:4px}.form-hint{color:#6b7280;font-size:12px;margin-top:4px}.alert{padding:14px 16px;border-radius:6px;margin-bottom:20px;font-size:14px}.alert-error{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}.alert-success{background:#f0fdf4;color:#166534;border:1px solid #bbf7d0}.alert-info{background:#eff6ff;color:#1e40af;border:1px solid #bfdbfe}.alert-warning{background:#fffbeb;color:#92400e;border:1px solid #fde68a}h1{font-size:24px;font-weight:700;margin-bottom:8px}h2{font-size:20px;font-weight:600;margin-bottom:16px}p{line-height:1.5;color:#6b7280}.loading{text-align:center;padding:48px;color:#6b7280}.session-bar{display:flex;align-items:center;gap:8px;font-size:13px;color:#374151}.session-bar .timer{font-weight:600;color:#2563eb}.session-bar .timer.warning{color:#dc2626}@media (max-width: 640px){.card{padding:20px;border-radius:0}}