:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,sans-serif;color:#2c3e50;background:linear-gradient(135deg,#667eea,#764ba2)}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:linear-gradient(135deg,#667eea,#764ba2)}.page{max-width:1000px;margin:0 auto;padding:40px 24px 60px;min-height:100vh}h1{font-size:36px;font-weight:700;margin-bottom:12px;color:#fff;text-align:center;text-shadow:0 2px 8px rgba(0,0,0,.1)}h2{font-size:24px;font-weight:600;color:#2c3e50;margin-bottom:16px}.card{background:#fff;padding:28px;margin:20px 0;border-radius:16px;box-shadow:0 10px 40px #00000026;transition:transform .3s ease,box-shadow .3s ease}.card:hover{transform:translateY(-4px);box-shadow:0 15px 50px #0003}button,.button{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border:none;padding:12px 24px;border-radius:10px;cursor:pointer;font-weight:600;text-decoration:none;transition:all .3s ease;font-size:15px}button:hover{transform:translateY(-2px);box-shadow:0 8px 20px #667eea66}button:disabled{opacity:.6;cursor:not-allowed;transform:none}.stepper{display:flex;gap:16px;margin-bottom:32px;flex-wrap:wrap;justify-content:center}.step{display:flex;align-items:center;gap:10px;opacity:.5;transition:opacity .3s ease}.step.active{opacity:1}.step-circle{width:40px;height:40px;border-radius:50%;background:#667eea;color:#fff;display:grid;place-items:center;font-weight:600;box-shadow:0 4px 12px #667eea4d}.progress{background:#e8e8e8;border-radius:12px;overflow:hidden;height:16px;margin:16px 0}.progress-bar{background:linear-gradient(90deg,#667eea,#764ba2);height:100%;transition:width .5s ease}.progress-text{text-align:center;font-size:14px;font-weight:600;color:#667eea;margin-top:8px}.accordion{margin-bottom:16px}.accordion-item{border:2px solid #e0e0e0;border-radius:12px;overflow:hidden;transition:all .3s ease}.accordion-item:hover{border-color:#667eea}.accordion-header{width:100%;display:flex;justify-content:space-between;align-items:center;padding:16px;background:#f8f9fa;border:none;cursor:pointer;font-size:16px;font-weight:600;transition:background .3s ease}.accordion-header:hover{background:#f0f1f5}.accordion-header[data-state=open]{background:#667eea;color:#fff}.accordion-header[data-state=open] .accordion-icon{transform:rotate(180deg);color:#fff}.accordion-icon{transition:transform .3s ease;font-size:20px}.accordion-body{padding:20px;background:#fff;border-top:2px solid #f0f1f5}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px}.raw-toggle button{margin-top:12px;font-size:13px;padding:8px 16px}.raw-text{white-space:pre-wrap;background:#f8f9fa;padding:16px;border-radius:10px;max-height:300px;overflow:auto;border-left:4px solid #667eea;font-family:Monaco,Courier New,monospace;font-size:13px;line-height:1.5}.file-input-group{display:flex;flex-direction:column;gap:12px;margin-bottom:20px}.file-input{padding:16px;border:2px dashed #667eea;border-radius:10px;background:#f8f9fa;cursor:pointer;transition:all .3s ease}.file-input:hover{border-color:#764ba2;background:#f0f1f5}.file-label{font-weight:600;color:#2c3e50;margin-bottom:4px}.file-name{font-size:14px;color:#667eea;font-weight:500}.score-card{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:24px;border-radius:16px;text-align:center;margin:16px 0}.score-value{font-size:48px;font-weight:700;margin:16px 0}.grade-badge{display:inline-block;padding:8px 16px;background:#fff3;border-radius:8px;font-weight:600;margin-top:12px}.question-score{display:flex;justify-content:space-between;align-items:center;padding:12px;background:#f8f9fa;border-radius:8px;margin:12px 0}.score-badge{background:#667eea;color:#fff;padding:6px 12px;border-radius:6px;font-weight:600;font-size:14px}.feedback-list{list-style:none;padding:0;margin:12px 0}.feedback-list li{padding:12px 16px;margin:8px 0;background:#fff;border-left:4px solid #667eea;border-radius:6px;color:#2c3e50;font-weight:500;line-height:1.5;box-shadow:0 2px 6px #0000000d}.feedback-positive li{border-left-color:#27ae60;background:#f0fdf4;color:#155724}.feedback-warning li{border-left-color:#e67e22;background:#fffbf0;color:#744210}.feedback-error li{border-left-color:#c0392b;background:#fef5f5;color:#721c24}.loading-spinner{display:inline-block;width:20px;height:20px;border:3px solid #f0f1f5;border-top-color:#667eea;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.status-badge{display:inline-block;padding:6px 12px;border-radius:20px;font-size:13px;font-weight:600}.status-success{background:#d4edda;color:#155724}.status-error{background:#f8d7da;color:#721c24}.status-info{background:#d1ecf1;color:#0c5460}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-top:24px}.feature-card{background:linear-gradient(135deg,#f8f9fa,#f0f1f5);padding:24px;border-radius:12px;border-left:4px solid #667eea;transition:all .3s ease}.feature-card:hover{transform:translateY(-8px);box-shadow:0 12px 24px #667eea33;border-left-color:#764ba2}.feature-icon{font-size:40px;margin-bottom:12px}.feature-card h3{margin:0 0 12px;color:#2c3e50;font-size:18px}.feature-card p{margin:0;color:#555;font-size:14px;line-height:1.6}.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;margin-top:24px}.step-item{background:#f8f9fa;padding:24px;border-radius:12px;border-top:4px solid #667eea;text-align:center}.step-number{display:inline-flex;align-items:center;justify-content:center;width:50px;height:50px;background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;border-radius:50%;font-weight:700;font-size:24px;margin-bottom:16px}.step-item h3{margin:12px 0;color:#2c3e50;font-size:18px}.step-item p{margin:0;color:#666;font-size:14px;line-height:1.6}