web/src/components/ui/Button.css

/* Button Component Styles */
.terra-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-semibold);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-bounce);
  text-decoration: none;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.terra-button:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(74, 124, 35, 0.2);
}

.terra-button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

/* Button Variants */
.terra-button--primary {
  background: linear-gradient(135deg, var(--color-forest-primary) 0%, var(--color-nature-green) 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.terra-button--primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--color-forest-deep) 0%, var(--color-forest-primary) 100%);
}

.terra-button--primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.terra-button--secondary {
  background: rgba(168, 230, 163, 0.1);
  color: var(--color-forest-primary);
  border: 2px solid var(--color-mint-light);
}

.terra-button--secondary:hover:not(:disabled) {
  background: rgba(168, 230, 163, 0.2);
  border-color: var(--color-nature-green);
  transform: scale(1.02);
}

.terra-button--outline {
  background: transparent;
  color: var(--color-nature-green);
  border: 2px solid var(--color-nature-green);
}

.terra-button--outline:hover:not(:disabled) {
  background: var(--color-nature-green);
  color: var(--color-white);
  transform: translateY(-1px);
}

.terra-button--ghost {
  background: transparent;
  color: var(--color-nature-green);
  border: none;
}

.terra-button--ghost:hover:not(:disabled) {
  background: rgba(168, 230, 163, 0.1);
  transform: scale(1.05);
}

.terra-button--danger {
  background: linear-gradient(135deg, var(--color-warning-red) 0%, #d32f2f 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.terra-button--danger:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, #d32f2f 0%, #b71c1c 100%);
}

.terra-button--success {
  background: linear-gradient(135deg, var(--color-success-green) 0%, #2E7D32 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.terra-button--success:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, #2E7D32 0%, #1B5E20 100%);
}

.terra-button--warning {
  background: linear-gradient(135deg, var(--color-sunset-orange) 0%, #F57C00 100%);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.terra-button--warning:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, #F57C00 0%, #E65100 100%);
}

/* Button Sizes */
.terra-button--xs {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  border-radius: var(--radius-sm);
}

.terra-button--sm {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.terra-button--md {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-base);
}

.terra-button--lg {
  padding: var(--spacing-lg) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

.terra-button--xl {
  padding: var(--spacing-xl) var(--spacing-2xl);
  font-size: var(--font-size-xl);
  border-radius: var(--radius-xl);
}

/* Button States */
.terra-button--loading {
  pointer-events: none;
}

.terra-button--loading .terra-button__text {
  opacity: 0.7;
}

.terra-button__spinner {
  display: flex;
  align-items: center;
  justify-content: center;
}

.terra-button__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2em;
}

.terra-button__text {
  display: flex;
  align-items: center;
}

/* Icon-only buttons */
.terra-button--icon-only {
  padding: var(--spacing-md);
  aspect-ratio: 1;
}

.terra-button--icon-only .terra-button__text {
  display: none;
}

/* Full width button */
.terra-button--full {
  width: 100%;
}

/* Floating Action Button */
.terra-button--fab {
  border-radius: var(--radius-full);
  padding: var(--spacing-lg);
  aspect-ratio: 1;
  box-shadow: var(--shadow-xl);
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  z-index: var(--z-fixed);
}

.terra-button--fab:hover:not(:disabled) {
  transform: scale(1.1);
  box-shadow: var(--shadow-2xl);
}

/* Button Group */
.terra-button-group {
  display: inline-flex;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.terra-button-group .terra-button {
  border-radius: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.terra-button-group .terra-button:first-child {
  border-top-left-radius: var(--radius-md);
  border-bottom-left-radius: var(--radius-md);
}

.terra-button-group .terra-button:last-child {
  border-top-right-radius: var(--radius-md);
  border-bottom-right-radius: var(--radius-md);
  border-right: none;
}

.terra-button-group .terra-button:hover:not(:disabled) {
  transform: none;
  z-index: 1;
}

/* Responsive Design */
@media (max-width: 640px) {
  .terra-button--lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
  }
  
  .terra-button--xl {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-lg);
  }
  
  .terra-button--fab {
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md);
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .terra-button--primary {
    background: var(--color-forest-deep);
    border: 2px solid var(--color-white);
  }
  
  .terra-button--secondary {
    border-width: 3px;
  }
  
  .terra-button--outline {
    border-width: 3px;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .terra-button {
    transition: none;
  }
  
  .terra-button:hover:not(:disabled) {
    transform: none;
  }
}