/* ===================================
   ACTIVITY PAGE STYLES
   =================================== */

.activity-container {
  max-width: 900px;
  margin: 0 auto;
}

.activity-header {
  text-align: center;
  margin-bottom: 32px;
  animation: fadeInDown 500ms ease forwards;
}

.activity-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.activity-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
}

/* Case Card */
.case-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-light);
  overflow: hidden;
  margin-bottom: 24px;
  animation: fadeInUp 500ms ease 100ms forwards;
  opacity: 0;
}

.case-card-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 20px 28px;
  color: var(--text-inverse);
  display: flex;
  align-items: center;
  gap: 12px;
}

.case-card-header .material-icons-round {
  font-size: 28px;
}

.case-card-header-title {
  font-size: 16px;
  font-weight: 700;
}

.case-card-type {
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  margin-right: auto;
}

.case-card-body {
  padding: 28px;
}

.case-content {
  font-size: 16px;
  line-height: 2;
  color: var(--text-primary);
  background: var(--accent);
  padding: 24px;
  border-radius: var(--radius-lg);
  border-right: 4px solid var(--warning);
  position: relative;
}

.case-content::before {
  content: '"';
  position: absolute;
  top: 8px;
  right: 12px;
  font-size: 48px;
  color: var(--warning);
  opacity: 0.3;
  font-family: serif;
  line-height: 1;
}

/* Activity Questions */
.activity-questions {
  margin-top: 28px;
}

.activity-question {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  padding: 24px;
  margin-bottom: 20px;
  animation: fadeInUp 400ms ease forwards;
  opacity: 0;
}

.activity-question-number {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}

.activity-question-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 16px;
}

/* Activity Feedback */
.activity-feedback {
  margin-top: 24px;
  padding: 24px;
  border-radius: var(--radius-lg);
  animation: scaleIn 400ms ease forwards;
  display: none;
}

.activity-feedback.show {
  display: block;
}

.activity-feedback.correct {
  background: var(--secondary-bg);
  border: 1px solid rgba(46, 125, 50, 0.2);
}

.activity-feedback.incorrect {
  background: var(--error-bg);
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.activity-feedback-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 16px;
  font-weight: 700;
}

.activity-feedback.correct .activity-feedback-header {
  color: var(--secondary);
}

.activity-feedback.incorrect .activity-feedback-header {
  color: var(--error);
}

.activity-feedback-text {
  font-size: 14px;
  line-height: 1.9;
  color: var(--text-primary);
}

.activity-submit-area {
  text-align: center;
  margin-top: 24px;
}

@media (max-width: 768px) {
  .case-card-body {
    padding: 20px;
  }

  .case-content {
    padding: 18px;
    font-size: 15px;
  }
}