/**
 * Unified Button Component Styles
 * 
 * SINGLE SOURCE OF TRUTH for all button styling.
 * Replaces all existing button implementations to prevent duplication.
 * Uses design system tokens exclusively.
 */

/* Base Button Styles */
.infitwin-button {
  /* Reset default button styles */
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  cursor: pointer;
  outline: none;
  
  /* Base styling */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  
  font-family: var(--font-family-primary);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  text-decoration: none;
  text-align: center;
  white-space: nowrap;
  
  border-radius: var(--spacing-sm);
  transition: all 0.2s ease;
  
  /* Default size (medium) */
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  min-height: 40px;
  
  /* Prevent text selection */
  user-select: none;
  -webkit-user-select: none;
  
  /* Ensure proper box model */
  box-sizing: border-box;
}

/* Button States */
.infitwin-button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  pointer-events: none;
}

.infitwin-button:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* Primary Button */
.infitwin-button--primary {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border: 1px solid var(--color-primary);
}

.infitwin-button--primary:hover:not(:disabled) {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px var(--color-shadow-medium);
}

.infitwin-button--primary:active:not(:disabled) {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(0);
}

/* Secondary Button */
.infitwin-button--secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.infitwin-button--secondary:hover:not(:disabled) {
  background-color: var(--color-background-hover);
  border-color: var(--color-border-dark);
}

.infitwin-button--secondary:active:not(:disabled) {
  background-color: var(--color-background-selected);
}

/* Tertiary/Ghost Button */
.infitwin-button--tertiary {
  background-color: transparent;
  color: var(--color-text-secondary);
  border: 1px solid transparent;
}

.infitwin-button--tertiary:hover:not(:disabled) {
  background-color: var(--color-background-hover);
  color: var(--color-text-primary);
}

.infitwin-button--tertiary:active:not(:disabled) {
  background-color: var(--color-background-selected);
}

/* Danger Button */
.infitwin-button--danger {
  background-color: var(--color-error);
  color: var(--color-text-inverse);
  border: 1px solid var(--color-error);
}

.infitwin-button--danger:hover:not(:disabled) {
  background-color: #DC2626; /* Darker red */
  border-color: #DC2626;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
}

.infitwin-button--danger:active:not(:disabled) {
  background-color: #B91C1C; /* Even darker red */
  border-color: #B91C1C;
  transform: translateY(0);
}

/* Success Button */
.infitwin-button--success {
  background-color: var(--color-success);
  color: var(--color-text-inverse);
  border: 1px solid var(--color-success);
}

.infitwin-button--success:hover:not(:disabled) {
  background-color: #059669; /* Darker green */
  border-color: #059669;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
}

.infitwin-button--success:active:not(:disabled) {
  background-color: #047857; /* Even darker green */
  border-color: #047857;
  transform: translateY(0);
}

/* Warning Button */
.infitwin-button--warning {
  background-color: var(--color-warning);
  color: #92400E; /* Dark text for better contrast on yellow */
  border: 1px solid var(--color-warning);
}

.infitwin-button--warning:hover:not(:disabled) {
  background-color: #FCD34D; /* Darker yellow */
  border-color: #FCD34D;
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(255, 215, 0, 0.3);
}

.infitwin-button--warning:active:not(:disabled) {
  background-color: #F59E0B; /* Orange-yellow */
  border-color: #F59E0B;
  color: var(--color-text-inverse);
  transform: translateY(0);
}

/* Size Variants */
.infitwin-button--small {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  min-height: 32px;
}

.infitwin-button--medium {
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: var(--font-size-base);
  min-height: 40px;
}

.infitwin-button--large {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--font-size-lg);
  min-height: 48px;
}

/* Icon Buttons */
.infitwin-button--icon-only {
  padding: var(--spacing-sm);
  min-width: 40px;
  width: 40px;
  height: 40px;
}

.infitwin-button--icon-only.infitwin-button--small {
  min-width: 32px;
  width: 32px;
  height: 32px;
  padding: var(--spacing-xs);
}

.infitwin-button--icon-only.infitwin-button--large {
  min-width: 48px;
  width: 48px;
  height: 48px;
  padding: var(--spacing-md);
}

/* Full Width Button */
.infitwin-button--full-width {
  width: 100%;
}

/* Loading State */
.infitwin-button--loading {
  position: relative;
  pointer-events: none;
}

.infitwin-button--loading .infitwin-button__text {
  opacity: 0;
}

.infitwin-button--loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: button-spin 1s linear infinite;
}

@keyframes button-spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

/* Button Group */
.infitwin-button-group {
  display: inline-flex;
  vertical-align: middle;
}

.infitwin-button-group .infitwin-button {
  border-radius: 0;
}

.infitwin-button-group .infitwin-button:first-child {
  border-top-left-radius: var(--spacing-sm);
  border-bottom-left-radius: var(--spacing-sm);
}

.infitwin-button-group .infitwin-button:last-child {
  border-top-right-radius: var(--spacing-sm);
  border-bottom-right-radius: var(--spacing-sm);
}

.infitwin-button-group .infitwin-button:not(:first-child) {
  border-left-width: 0;
}

.infitwin-button-group .infitwin-button:hover {
  z-index: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
  .infitwin-button--large {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-base);
    min-height: 44px;
  }
  
  .infitwin-button--medium {
    min-height: 44px; /* Larger touch targets on mobile */
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .infitwin-button {
    transition: none;
  }
  
  .infitwin-button:hover:not(:disabled) {
    transform: none;
  }
  
  .infitwin-button--loading::after {
    animation: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .infitwin-button {
    border-width: 2px;
  }
  
  .infitwin-button--tertiary {
    border-color: var(--color-border-dark);
  }
}

/* Print styles */
@media print {
  .infitwin-button {
    background: none !important;
    color: var(--color-text-primary) !important;
    border: 1px solid var(--color-text-primary) !important;
    box-shadow: none !important;
  }
}