.fade-in {
  animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#result {
  transition: all 0.3s ease;
}

.response-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: rgba(76, 175, 80, 0.1);
  border-radius: 8px;
  margin-bottom: 24px;
  border-left: 4px solid #4caf50;
}

.response-header-icon {
  font-size: 28px;
  color: #4caf50;
}

.response-header-content h3 {
  font-size: 1.7rem;
  color: var(--box-text-color);
  margin: 0;
}

.result-section {
  margin-bottom: 30px;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--box-text-color);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-color);
}

.section-header i {
  color: var(--primary-color);
}

.primary-response-box {
  background: linear-gradient(
    135deg,
    rgba(26, 116, 251, 0.05),
    rgba(151, 226, 255, 0.1)
  );
  padding: 24px;
  border-radius: 8px;
  border-left: 4px solid var(--primary-color);
  margin-bottom: 12px;
}

.primary-response-text {
  font-size: 1.3rem;
  line-height: 1.8;
  color: var(--box-text-color);
  margin-bottom: 16px;
}

.response-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.meta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--primary-color);
  color: white;
  border-radius: 20px;
  font-size: 1.3rem;
  font-weight: 600;
  text-shadow: 0 2px 5px rgba(151, 226, 255, 0.1);
}

.variants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.variant-card {
  background: var(--background-color);
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  padding: 16px;
  transition: all 0.3s ease;
  animation: fadeIn 0.5s ease-out;
}

.variant-card:hover {
  border-color: var(--primary-color);
  box-shadow: 0 4px 12px rgba(26, 116, 251, 0.15);
  transform: translateY(-2px);
}

.variant-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.variant-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1.5rem;
  color: var(--primary-color);
}

.variant-badges {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.variant-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 1.3rem;
  font-weight: 600;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  text-transform: capitalize;
}

.badge-formal,
.badge-high {
  background: #e3f2fd;
  color: #1976d2;
}

.badge-casual,
.badge-low {
  background: #f3e5f5;
  color: #7b1fa2;
}

.badge-creative,
.badge-medium {
  background: #fff3e0;
  color: #e65100;
}

.badge-short {
  background: #e8f5e9;
  color: #2e7d32;
}

.badge-long {
  background: #fce4ec;
  color: #c2185b;
}

.variant-text {
  font-size: 1.3rem;
  line-height: 1.6;
  color: var(--box-text-color);
  margin-bottom: 12px;
  min-height: 60px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 16px;
}

.info-card {
  background: var(--background-color);
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  padding: 16px;
  animation: fadeIn 0.5s ease-out;
}

.info-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--primary-color);
  margin-bottom: 12px;
}

.info-card-content {
  font-size: 1.3rem;
  line-height: 1.6;
  color: var(--box-text-color);
}

.key-points-list {
  list-style: none;
}

.key-points-list li {
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
  font-size: 1.2rem;
  color: var(--box-text-color);
}

.key-points-list li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #4caf50;
  font-weight: bold;
}

.follow-ups-grid {
  display: grid;
  gap: 12px;
}

.follow-up-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  background: var(--background-color);
  border-radius: 8px;
  border-left: 4px solid var(--primary-color);
  cursor: pointer;
  transition: all 0.3s ease;
  animation: fadeIn 0.5s ease-out;
}

.follow-up-item:hover {
  background: rgba(26, 116, 251, 0.05);
  transform: translateX(4px);
}

.follow-up-item i {
  color: var(--primary-color);
  font-size: 1.1rem;
  margin-top: 2px;
  flex-shrink: 0;
}

.follow-up-item span {
  font-size: 0.95rem;
  color: var(--box-text-color);
  line-height: 1.5;
}

.export-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 2px solid #e0e0e0;
}

.export-btn {
  padding: 10px 16px;
  font-size: 0.9rem;
}

@media (max-width: 600px) {
  .tool-heading h1 {
    font-size: 1.8rem;
  }

  .card {
    padding: 20px;
  }

  .variants-grid {
    grid-template-columns: 1fr;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }
}