/**
 * Salt Design System - Buttons
 * Based on Figma Design System: https://www.figma.com/design/CqdoCVx42XayJMKQ1mMGgr/Salt-Design-System
 *
 * Button System:
 * - Variants: filled, ghost, ringed, soft, glass
 * - Colors: primary, secondary, error, warning, success, disabled
 * - Sizes: xl, lg, md, sm, xs
 * - States: default, hover, active, focus, disabled
 */

/* ============================================================================
   BUTTON BASE STYLES
   ============================================================================ */

.btn {
  /* Reset */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: none;
  outline: none;
  text-decoration: none;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;

  /* Typography */
  font-family: var(--font-sans);
  font-weight: var(--font-medium);
  line-height: 1;
  text-align: center;

  /* Animation */
  transition: all 0.2s ease;

  /* Default size (medium) */
  font-size: var(--text-sm);
  padding: 0.625rem 1rem;
  border-radius: 6px;
  min-height: 34px;
}

.btn:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

.btn:disabled,
.btn.disabled {
  cursor: not-allowed;
  opacity: 0.6;
  pointer-events: none;
}

/* Icon support */
.btn-icon {
  display: inline-flex;
  flex-shrink: 0;
}

.btn-icon-left {
  margin-right: -0.125rem;
}

.btn-icon-right {
  margin-left: -0.125rem;
}

/* Loading state */
.btn.loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}

.btn.loading::after {
  content: '';
  position: absolute;
  width: 1em;
  height: 1em;
  top: 50%;
  left: 50%;
  margin-left: -0.5em;
  margin-top: -0.5em;
  border: 2px solid currentColor;
  border-radius: 50%;
  border-top-color: transparent;
  animation: btn-spin 0.6s linear infinite;
}

@keyframes btn-spin {
  to {
    transform: rotate(360deg);
  }
}

/* ============================================================================
   BUTTON SIZES
   ============================================================================ */

.btn-xl {
  font-size: var(--text-xl);
  padding: 1rem 1.5rem;
  border-radius: 8px;
  min-height: 56px;
}

.btn-lg {
  font-size: var(--text-base);
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  min-height: 48px;
}

.btn-md {
  font-size: var(--text-sm);
  padding: 0.5rem 1rem;
  border-radius: 6px;
  min-height: 34px;
}

.btn-sm {
  font-size: var(--text-sm);
  padding: 0.5rem 0.875rem;
  border-radius: 4px;
  min-height: 32px;
}

.btn-xs {
  font-size: var(--text-xs);
  padding: 0.375rem 0.75rem;
  border-radius: 4px;
  min-height: 24px;
}

/* ============================================================================
   FILLED VARIANT (Solid background)
   ============================================================================ */

/* Primary Filled */
.btn-filled-primary,
.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-on-primary);
  border: 1px solid transparent;
}

.btn-filled-primary:hover:not(:disabled),
.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
}

.btn-filled-primary:active:not(:disabled),
.btn-primary:active:not(:disabled) {
  background-color: var(--color-primary-active);
}

/* Secondary Filled */
.btn-filled-secondary,
.btn-secondary {
  background-color: var(--color-neutral-4);
  color: var(--color-text-base);
  border: 1px solid var(--color-border-base);
}

.btn-filled-secondary:hover:not(:disabled),
.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-neutral-5);
  border-color: var(--color-border-strong);
}

.btn-filled-secondary:active:not(:disabled),
.btn-secondary:active:not(:disabled) {
  background-color: var(--color-neutral-6);
}

/* Success Filled */
.btn-filled-success,
.btn-success {
  background-color: var(--color-success);
  color: #000000;
  border: 1px solid transparent;
}

.btn-filled-success:hover:not(:disabled),
.btn-success:hover:not(:disabled) {
  background-color: var(--color-success-10);
}

.btn-filled-success:active:not(:disabled),
.btn-success:active:not(:disabled) {
  background-color: var(--color-success-11);
  color: #ffffff;
}

/* Error Filled */
.btn-filled-error,
.btn-danger {
  background-color: var(--color-error);
  color: #ffffff;
  border: 1px solid transparent;
}

.btn-filled-error:hover:not(:disabled),
.btn-danger:hover:not(:disabled) {
  background-color: var(--color-error-10);
}

.btn-filled-error:active:not(:disabled),
.btn-danger:active:not(:disabled) {
  background-color: var(--color-error-11);
}

/* Warning Filled */
.btn-filled-warning,
.btn-warning {
  background-color: var(--color-warning);
  color: #000000;
  border: 1px solid transparent;
}

.btn-filled-warning:hover:not(:disabled),
.btn-warning:hover:not(:disabled) {
  background-color: var(--color-warning-10);
}

.btn-filled-warning:active:not(:disabled),
.btn-warning:active:not(:disabled) {
  background-color: var(--color-warning-11);
  color: #ffffff;
}

/* ============================================================================
   GHOST VARIANT (Transparent background, text color only)
   ============================================================================ */

/* Primary Ghost */
.btn-ghost-primary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid transparent;
}

.btn-ghost-primary:hover:not(:disabled) {
  background-color: var(--color-purple-signal-3);
}

.btn-ghost-primary:active:not(:disabled) {
  background-color: var(--color-purple-signal-4);
}

/* Secondary Ghost */
.btn-ghost-secondary {
  background-color: transparent;
  color: var(--color-text-base);
  border: 1px solid transparent;
}

.btn-ghost-secondary:hover:not(:disabled) {
  background-color: var(--color-neutral-3);
}

.btn-ghost-secondary:active:not(:disabled) {
  background-color: var(--color-neutral-4);
}

/* Success Ghost */
.btn-ghost-success {
  background-color: transparent;
  color: var(--color-success);
  border: 1px solid transparent;
}

.btn-ghost-success:hover:not(:disabled) {
  background-color: var(--color-success-3);
}

.btn-ghost-success:active:not(:disabled) {
  background-color: var(--color-success-4);
}

/* Error Ghost */
.btn-ghost-error {
  background-color: transparent;
  color: var(--color-error);
  border: 1px solid transparent;
}

.btn-ghost-error:hover:not(:disabled) {
  background-color: var(--color-error-3);
}

.btn-ghost-error:active:not(:disabled) {
  background-color: var(--color-error-4);
}

/* Warning Ghost */
.btn-ghost-warning {
  background-color: transparent;
  color: var(--color-warning-11);
  border: 1px solid transparent;
}

.btn-ghost-warning:hover:not(:disabled) {
  background-color: var(--color-warning-3);
}

.btn-ghost-warning:active:not(:disabled) {
  background-color: var(--color-warning-4);
}

/* ============================================================================
   RINGED VARIANT (Outline/Border only)
   ============================================================================ */

/* Primary Ringed */
.btn-ringed-primary,
.btn-outline-primary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-ringed-primary:hover:not(:disabled),
.btn-outline-primary:hover:not(:disabled) {
  background-color: var(--color-purple-signal-3);
  border-color: var(--color-primary-hover);
}

.btn-ringed-primary:active:not(:disabled),
.btn-outline-primary:active:not(:disabled) {
  background-color: var(--color-purple-signal-4);
  border-color: var(--color-primary-active);
}

/* Secondary Ringed */
.btn-ringed-secondary,
.btn-outline-secondary {
  background-color: transparent;
  color: var(--color-text-base);
  border: 1px solid var(--color-border-base);
}

.btn-ringed-secondary:hover:not(:disabled),
.btn-outline-secondary:hover:not(:disabled) {
  background-color: var(--color-neutral-3);
  border-color: var(--color-border-strong);
}

.btn-ringed-secondary:active:not(:disabled),
.btn-outline-secondary:active:not(:disabled) {
  background-color: var(--color-neutral-4);
}

/* Success Ringed */
.btn-ringed-success,
.btn-outline-success {
  background-color: transparent;
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.btn-ringed-success:hover:not(:disabled),
.btn-outline-success:hover:not(:disabled) {
  background-color: var(--color-success-3);
  border-color: var(--color-success-10);
}

.btn-ringed-success:active:not(:disabled),
.btn-outline-success:active:not(:disabled) {
  background-color: var(--color-success-4);
}

/* Error Ringed */
.btn-ringed-error,
.btn-outline-danger {
  background-color: transparent;
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

.btn-ringed-error:hover:not(:disabled),
.btn-outline-danger:hover:not(:disabled) {
  background-color: var(--color-error-3);
  border-color: var(--color-error-10);
}

.btn-ringed-error:active:not(:disabled),
.btn-outline-danger:active:not(:disabled) {
  background-color: var(--color-error-4);
}

/* Warning Ringed */
.btn-ringed-warning,
.btn-outline-warning {
  background-color: transparent;
  color: var(--color-warning-11);
  border: 1px solid var(--color-warning-9);
}

.btn-ringed-warning:hover:not(:disabled),
.btn-outline-warning:hover:not(:disabled) {
  background-color: var(--color-warning-3);
  border-color: var(--color-warning-10);
}

.btn-ringed-warning:active:not(:disabled),
.btn-outline-warning:active:not(:disabled) {
  background-color: var(--color-warning-4);
}

/* ============================================================================
   SOFT VARIANT (Subtle background with colored text)
   ============================================================================ */

/* Primary Soft */
.btn-soft-primary {
  background-color: var(--color-purple-signal-3);
  color: var(--color-primary-active);
  border: 1px solid transparent;
}

.btn-soft-primary:hover:not(:disabled) {
  background-color: var(--color-purple-signal-4);
}

.btn-soft-primary:active:not(:disabled) {
  background-color: var(--color-purple-signal-5);
}

/* Secondary Soft */
.btn-soft-secondary {
  background-color: var(--color-neutral-3);
  color: var(--color-text-base);
  border: 1px solid transparent;
}

.btn-soft-secondary:hover:not(:disabled) {
  background-color: var(--color-neutral-4);
}

.btn-soft-secondary:active:not(:disabled) {
  background-color: var(--color-neutral-5);
}

/* Success Soft */
.btn-soft-success {
  background-color: var(--color-success-3);
  color: var(--color-success-11);
  border: 1px solid transparent;
}

.btn-soft-success:hover:not(:disabled) {
  background-color: var(--color-success-4);
}

.btn-soft-success:active:not(:disabled) {
  background-color: var(--color-success-5);
}

/* Error Soft */
.btn-soft-error {
  background-color: var(--color-error-3);
  color: var(--color-error-11);
  border: 1px solid transparent;
}

.btn-soft-error:hover:not(:disabled) {
  background-color: var(--color-error-4);
}

.btn-soft-error:active:not(:disabled) {
  background-color: var(--color-error-5);
}

/* Warning Soft */
.btn-soft-warning {
  background-color: var(--color-warning-3);
  color: var(--color-warning-11);
  border: 1px solid transparent;
}

.btn-soft-warning:hover:not(:disabled) {
  background-color: var(--color-warning-4);
}

.btn-soft-warning:active:not(:disabled) {
  background-color: var(--color-warning-5);
}

/* ============================================================================
   GLASS VARIANT (Frosted glass effect with backdrop blur)
   ============================================================================ */

/* Primary Glass */
.btn-glass-primary {
  background-color: rgba(103, 40, 194, 0.1);
  color: var(--color-primary);
  border: 1px solid rgba(103, 40, 194, 0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-glass-primary:hover:not(:disabled) {
  background-color: rgba(103, 40, 194, 0.15);
  border-color: var(--color-primary);
}

.btn-glass-primary:active:not(:disabled) {
  background-color: rgba(103, 40, 194, 0.2);
}

/* Secondary Glass */
.btn-glass-secondary {
  background-color: var(--color-neutral-alpha-3);
  color: var(--color-text-base);
  border: 1px solid var(--color-border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-glass-secondary:hover:not(:disabled) {
  background-color: var(--color-neutral-alpha-4);
  border-color: var(--color-border-base);
}

.btn-glass-secondary:active:not(:disabled) {
  background-color: var(--color-neutral-alpha-6);
}

/* Success Glass */
.btn-glass-success {
  background-color: rgba(41, 163, 131, 0.1);
  color: var(--color-success);
  border: 1px solid rgba(41, 163, 131, 0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-glass-success:hover:not(:disabled) {
  background-color: rgba(41, 163, 131, 0.15);
  border-color: var(--color-success);
}

.btn-glass-success:active:not(:disabled) {
  background-color: rgba(41, 163, 131, 0.2);
}

/* Error Glass */
.btn-glass-error {
  background-color: rgba(229, 72, 77, 0.1);
  color: var(--color-error);
  border: 1px solid rgba(229, 72, 77, 0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-glass-error:hover:not(:disabled) {
  background-color: rgba(229, 72, 77, 0.15);
  border-color: var(--color-error);
}

.btn-glass-error:active:not(:disabled) {
  background-color: rgba(229, 72, 77, 0.2);
}

/* Warning Glass */
.btn-glass-warning {
  background-color: rgba(255, 197, 61, 0.1);
  color: var(--color-warning-11);
  border: 1px solid rgba(255, 197, 61, 0.2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-glass-warning:hover:not(:disabled) {
  background-color: rgba(255, 197, 61, 0.15);
  border-color: var(--color-warning-9);
}

.btn-glass-warning:active:not(:disabled) {
  background-color: rgba(255, 197, 61, 0.2);
}

/* ============================================================================
   BUTTON GROUPS
   ============================================================================ */

.btn-group {
  display: inline-flex;
  gap: 0.5rem;
}

.btn-group-attached {
  display: inline-flex;
  gap: 0;
}

.btn-group-attached .btn:not(:first-child):not(:last-child) {
  border-radius: 0;
  border-left-width: 0;
}

.btn-group-attached .btn:first-child:not(:last-child) {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
}

.btn-group-attached .btn:last-child:not(:first-child) {
  border-top-left-radius: 0;
  border-bottom-left-radius: 0;
  border-left-width: 0;
}

/* ============================================================================
   ICON BUTTONS (Square buttons with just an icon)
   ============================================================================ */

.btn-icon-only {
  padding: 0;
  aspect-ratio: 1;
  justify-content: center;
}

.btn-icon-only.btn-xl {
  width: 56px;
  height: 56px;
}

.btn-icon-only.btn-lg {
  width: 48px;
  height: 48px;
}

.btn-icon-only.btn-md {
  width: 34px;
  height: 34px;
}

.btn-icon-only.btn-sm {
  width: 32px;
  height: 32px;
}

.btn-icon-only.btn-xs {
  width: 24px;
  height: 24px;
}

/* ============================================================================
   FULL WIDTH BUTTONS
   ============================================================================ */

.btn-block {
  display: flex;
  width: 100%;
}

/* ============================================================================
   DISABLED STATE (applies to all variants)
   ============================================================================ */

.btn:disabled,
.btn.disabled {
  background-color: var(--color-neutral-3) !important;
  color: var(--color-text-disabled) !important;
  border-color: var(--color-border-subtle) !important;
  cursor: not-allowed;
  opacity: 0.6;
}

/* ============================================================================
   LINK BUTTON (Button that looks like a link)
   ============================================================================ */

.btn-link {
  background-color: transparent;
  color: var(--color-primary);
  border: none;
  padding: 0;
  min-height: auto;
  text-decoration: underline;
}

.btn-link:hover:not(:disabled) {
  color: var(--color-primary-hover);
}

.btn-link:active:not(:disabled) {
  color: var(--color-primary-active);
}

/* ============================================================================
   BOOTSTRAP COMPATIBILITY
   ============================================================================ */

/* Map Bootstrap classes to Salt Design System */
.btn.btn-primary {
  /* Already defined above */
}

.btn.btn-secondary {
  /* Already defined above */
}

.btn.btn-success {
  /* Already defined above */
}

.btn.btn-danger {
  /* Already defined above */
}

.btn.btn-warning {
  /* Already defined above */
}

.btn.btn-info {
  background-color: var(--color-info);
  color: #ffffff;
  border: 1px solid transparent;
}

.btn.btn-info:hover:not(:disabled) {
  background-color: var(--color-info-10);
}

.btn.btn-light {
  background-color: var(--color-neutral-2);
  color: var(--color-text-base);
  border: 1px solid var(--color-border-subtle);
}

.btn.btn-dark {
  background-color: var(--color-neutral-12);
  color: var(--color-neutral-1);
  border: 1px solid transparent;
}

/* Bootstrap size classes */
.btn.btn-lg {
  /* Already defined above */
}

.btn.btn-sm {
  /* Already defined above */
}

/* Bootstrap outline classes */
.btn.btn-outline-primary {
  /* Already defined above */
}

.btn.btn-outline-secondary {
  /* Already defined above */
}

.btn.btn-outline-success {
  /* Already defined above */
}

.btn.btn-outline-danger {
  /* Already defined above */
}

.btn.btn-outline-warning {
  /* Already defined above */
}

.btn.btn-outline-info {
  background-color: transparent;
  color: var(--color-info);
  border: 1px solid var(--color-info);
}

.btn.btn-outline-info:hover:not(:disabled) {
  background-color: var(--color-info-3);
}