/**
 * Conversor de Unidades - Estilos
 */

/* Category selector */
.category-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.category-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border: 2px solid var(--gray-200);
  background: white;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.category-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.category-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.category-btn svg {
  flex-shrink: 0;
}

/* Converter layout */
.converter-container {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: start;
  margin-bottom: 1.5rem;
}

.converter-box {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.converter-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.converter-input {
  width: 100%;
  padding: 1rem;
  border: 2px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 1.5rem;
  font-weight: 600;
  font-family: monospace;
  text-align: right;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.converter-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.converter-input.result {
  background: var(--gray-50);
  border-color: var(--gray-200);
}

.unit-selector {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius);
  font-size: 1rem;
  margin-top: 0.75rem;
  cursor: pointer;
  background: white;
}

.unit-selector:focus {
  outline: none;
  border-color: var(--primary);
}

/* Swap button */
.swap-container {
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: 3rem;
}

.swap-btn {
  width: 48px;
  height: 48px;
  border: 2px solid var(--gray-300);
  background: white;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.swap-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: rotate(180deg);
}

/* Formula display */
.formula-display {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
  color: var(--gray-600);
  text-align: center;
}

.formula-display code {
  background: white;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-family: monospace;
  font-weight: 500;
}

/* Quick conversions */
.quick-conversions {
  margin-top: 1.5rem;
}

.quick-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.quick-item {
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--gray-50);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
}

.quick-from {
  color: var(--gray-600);
}

.quick-to {
  font-weight: 600;
  color: var(--gray-800);
  font-family: monospace;
}

/* Responsive */
@media (max-width: 768px) {
  .converter-container {
    grid-template-columns: 1fr;
  }

  .swap-container {
    padding: 0;
  }

  .swap-btn {
    transform: rotate(90deg);
  }

  .swap-btn:hover {
    transform: rotate(270deg);
  }

  .category-selector {
    justify-content: center;
  }

  .converter-input {
    font-size: 1.25rem;
  }
}