/* Unit Converter Tool Styles */

.converter-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.converter-container {
  max-width: 1000px;
  margin: 0 auto;
  background: white;
  border-radius: 20px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  overflow: hidden;
}

.converter-header {
  padding: 40px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: white;
  text-align: center;
}

.converter-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 15px;
}

.converter-header p {
  font-size: 1.1rem;
  opacity: 0.9;
}

.converter-content {
  padding: 40px;
}

.category-selection {
  margin-bottom: 40px;
}

.category-tabs {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 10px;
}

.category-tab {
  padding: 12px 20px;
  background: #f8fafc;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  font-weight: 600;
  color: #64748b;
  cursor: pointer;
  transition: all 0.3s ease;
  white-space: nowrap;
  font-size: 0.9rem;
}

.category-tab:hover {
  background: #f1f5f9;
  border-color: #f59e0b;
}

.category-tab.active {
  background: #f59e0b;
  color: white;
  border-color: #f59e0b;
}

.converter-interface {
  position: relative;
  min-height: 300px;
}

.converter-panel {
  display: none;
}

.converter-panel.active {
  display: block;
}

.converter-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 30px;
  align-items: end;
}

.converter-input {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.converter-input label {
  font-weight: 600;
  color: #374151;
  font-size: 1.1rem;
}

.converter-input input {
  padding: 16px 20px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 18px;
  transition: border-color 0.3s ease;
  background: #f8fafc;
}

.converter-input input:focus {
  outline: none;
  border-color: #f59e0b;
  background: white;
}

.converter-input input[readonly] {
  background: #f1f5f9;
  color: #1f2937;
  font-weight: 600;
}

.converter-input select {
  padding: 16px 20px;
  border: 2px solid #e5e7eb;
  border-radius: 12px;
  font-size: 16px;
  transition: border-color 0.3s ease;
  background: white;
  cursor: pointer;
}

.converter-input select:focus {
  outline: none;
  border-color: #f59e0b;
}

.converter-swap {
  display: flex;
  align-items: center;
  justify-content: center;
}

.converter-swap button {
  width: 50px;
  height: 50px;
  border: none;
  border-radius: 50%;
  background: #f59e0b;
  color: white;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.converter-swap button:hover {
  background: #d97706;
  transform: rotate(180deg);
}

.converter-swap svg {
  width: 24px;
  height: 24px;
}

.conversion-history {
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid #e5e7eb;
}

.conversion-history h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #1f2937;
  margin-bottom: 20px;
}

#history-list {
  max-height: 200px;
  overflow-y: auto;
}

.no-history {
  color: #6b7280;
  text-align: center;
  padding: 20px;
  font-style: italic;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: #f8fafc;
  border-radius: 8px;
  margin-bottom: 8px;
  transition: background 0.3s ease;
}

.history-item:hover {
  background: #f1f5f9;
}

.history-conversion {
  font-weight: 600;
  color: #1f2937;
}

.history-time {
  font-size: 0.9rem;
  color: #6b7280;
}

/* Features Section */
.features {
  padding: 80px 0;
  background: white;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.feature-card {
  padding: 30px;
  background: white;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon-wrapper {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.feature-icon {
  width: 28px;
  height: 28px;
  color: white;
}

.feature-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 15px;
}

.feature-description {
  color: #64748b;
  line-height: 1.6;
}

/* Related Tools Section */
.related-tools {
  padding: 80px 0;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 50px;
}

.tool-card {
  background: white;
  border: 2px solid #e5e7eb;
  border-radius: 15px;
  padding: 30px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.tool-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  border-color: #f59e0b;
}

.tool-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.tool-icon svg {
  width: 28px;
  height: 28px;
  color: white;
}

.tool-title {
  font-size: 1.3rem;
  font-weight: 600;
  color: #1e293b;
  margin-bottom: 15px;
  text-align: center;
}

.tool-description {
  color: #64748b;
  line-height: 1.6;
  text-align: center;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .converter-container {
    margin: 0 20px;
    border-radius: 15px;
  }
  
  .converter-header {
    padding: 30px 20px;
  }
  
  .converter-header h2 {
    font-size: 2rem;
  }
  
  .converter-content {
    padding: 20px;
  }
  
  .category-tabs {
    justify-content: flex-start;
    overflow-x: auto;
  }
  
  .converter-row {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .converter-swap {
    justify-content: center;
    margin: 20px 0;
  }
  
  .converter-swap button {
    transform: rotate(90deg);
  }
  
  .converter-swap button:hover {
    transform: rotate(270deg);
  }
  
  .features-grid,
  .tools-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .category-tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
  }
  
  .category-tab {
    font-size: 0.8rem;
    padding: 10px 15px;
  }
  
  .converter-input input,
  .converter-input select {
    font-size: 16px;
    padding: 14px 16px;
  }
  
  .converter-swap button {
    width: 45px;
    height: 45px;
  }
  
  .converter-swap svg {
    width: 20px;
    height: 20px;
  }
}