.grading-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.2s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.grading-modal {
  background: white;
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  max-width: 600px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.grading-modal-header {
  padding: 24px 32px;
  border-bottom: 2px solid #f0f0f0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.grading-modal-header h2 {
  margin: 0;
  color: white;
  font-size: 24px;
  font-weight: 600;
}

.grading-modal-body {
  padding: 32px;
}

/* 機器人資訊 */
.assistant-info {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  border-radius: 12px;
  margin-bottom: 24px;
}

.assistant-icon {
  font-size: 48px;
  line-height: 1;
}

.assistant-details h3 {
  margin: 0 0 4px 0;
  font-size: 20px;
  color: #2c3e50;
}

.assistant-subtitle {
  margin: 0;
  font-size: 14px;
  color: #7f8c8d;
}

/* 進度條 */
.progress-section {
  margin-bottom: 24px;
}

.progress-bar-container {
  width: 100%;
  height: 12px;
  background-color: #e0e0e0;
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 8px;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
  border-radius: 6px;
  transition: width 0.5s ease;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.8;
  }
}

.progress-text {
  text-align: center;
  font-size: 18px;
  font-weight: 600;
  color: #667eea;
}

/* 步驟列表 */
.steps-section {
  background: #f8f9fa;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
}

.step-item {
  padding: 12px 16px;
  margin-bottom: 8px;
  border-radius: 8px;
  font-size: 15px;
  color: #95a5a6;
  transition: all 0.3s ease;
}

.step-item.active {
  background: #fff;
  color: #667eea;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.2);
  animation: highlight 0.5s ease-in;
}

@keyframes highlight {
  0% {
    transform: translateX(-10px);
    opacity: 0;
  }
  100% {
    transform: translateX(0);
    opacity: 1;
  }
}

.step-item.completed {
  color: #27ae60;
  text-decoration: line-through;
  opacity: 0.6;
}

/* 提示資訊 */
.grading-info {
  background: #fff3cd;
  border-left: 4px solid #ffc107;
  border-radius: 8px;
  padding: 16px;
}

.info-text {
  margin: 0 0 8px 0;
  font-size: 15px;
  color: #856404;
  font-weight: 500;
}

.info-subtitle {
  margin: 0;
  font-size: 13px;
  color: #856404;
  opacity: 0.8;
}

/* 響應式設計 */
@media (max-width: 768px) {
  .grading-modal {
    width: 95%;
    max-height: 95vh;
  }

  .grading-modal-header {
    padding: 20px 24px;
  }

  .grading-modal-header h2 {
    font-size: 20px;
  }

  .grading-modal-body {
    padding: 24px;
  }

  .assistant-icon {
    font-size: 36px;
  }

  .assistant-details h3 {
    font-size: 18px;
  }

  .step-item {
    font-size: 14px;
    padding: 10px 12px;
  }
}