/**
 * Button Components
 * Explicit .btn / .btn-* classes only — bare <button> is not styled as a CTA.
 * Host, discover, and form controls define their own button appearance.
 */

/* ============================================================================
   MINIMAL NATIVE BUTTON RESET
   ============================================================================ */

:where(button) {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

/* ============================================================================
   SHARED CTA SHELL (.btn and standalone variant classes)
   ============================================================================ */

.btn,
.btn-primary,
.btn-brand,
.btn-brand-outline,
.btn-secondary,
.btn-accent,
.btn-success,
.btn-danger,
.btn-warning {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  font-size: var(--type-button-size, 0.875rem);
  font-weight: var(--font-weight-semibold, 600);
  line-height: var(--line-height-tight, 1.2);
  border: none;
  border-radius: var(--radius-control, var(--border-radius-base, 0.5rem));
  cursor: pointer;
  transition: background-color var(--transition-base, 0.2s ease),
    border-color var(--transition-base, 0.2s ease),
    color var(--transition-base, 0.2s ease),
    box-shadow var(--transition-base, 0.2s ease),
    transform var(--transition-base, 0.2s ease);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  position: relative;
  overflow: hidden;
}

@media (min-width: 1024px) {
  .btn:hover:not(:disabled):not(.disabled),
  .btn-primary:hover:not(:disabled):not(.disabled),
  .btn-brand:hover:not(:disabled),
  .btn-brand-outline:hover:not(:disabled),
  .btn-secondary:hover:not(:disabled):not(.disabled),
  .btn-accent:hover:not(:disabled):not(.disabled),
  .btn-success:hover:not(:disabled):not(.disabled),
  .btn-danger:hover:not(:disabled):not(.disabled),
  .btn-warning:hover:not(:disabled):not(.disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-medium);
  }
}

.btn:active:not(:disabled):not(.disabled),
.btn-primary:active:not(:disabled):not(.disabled),
.btn-brand:active:not(:disabled),
.btn-brand-outline:active:not(:disabled),
.btn-secondary:active:not(:disabled):not(.disabled),
.btn-accent:active:not(:disabled):not(.disabled),
.btn-success:active:not(:disabled):not(.disabled),
.btn-danger:active:not(:disabled):not(.disabled),
.btn-warning:active:not(:disabled):not(.disabled) {
  transform: translateY(0);
}

/* ============================================================================
   BUTTON VARIANTS
   ============================================================================ */

.btn-primary {
  background: var(--color-primary-blue, #2563eb);
  color: white;
}

.btn-primary:hover:not(:disabled):not(.disabled) {
  background: var(--color-primary-blue-hover);
  box-shadow: var(--shadow-card-raised, var(--shadow-md));
}

/* Brand conversion CTA — fill tokens for solid; fg for outline/text */
.btn-brand {
  border: 1px solid var(--color-brand-accent);
  background: var(--color-brand-accent);
  color: var(--color-brand-accent-text);
  box-shadow: var(--color-brand-accent-shadow);
}

.btn-brand:hover:not(:disabled) {
  background: var(--color-brand-accent-hover);
  border-color: var(--color-brand-accent-hover);
  box-shadow: var(--shadow-card-raised, var(--shadow-md));
}

.btn-brand:active:not(:disabled) {
  background: var(--color-brand-accent-pressed);
  border-color: var(--color-brand-accent-pressed);
}

.btn-brand:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-brand-accent-focus), var(--color-brand-accent-shadow);
}

.btn-brand:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-brand-outline {
  background: transparent;
  color: var(--color-brand-accent-fg, var(--color-brand-accent));
  border: 1px solid var(--color-brand-accent-fg, var(--color-brand-accent));
}

.btn-brand-outline:hover:not(:disabled) {
  background: var(--color-brand-accent-outline-hover);
  border-color: var(--color-brand-accent-fg-hover, var(--color-brand-accent-hover));
  color: var(--color-brand-accent-fg-hover, var(--color-brand-accent-hover));
}

.btn-brand-outline:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-brand-accent-focus);
}

.btn-brand-outline:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

a.link-brand {
  color: var(--color-brand-accent-fg, var(--color-brand-accent));
  text-decoration: none;
  font-weight: var(--font-weight-semibold, 600);
  transition: color 0.15s ease;
}

a.link-brand:hover {
  color: var(--color-brand-accent-fg-hover, var(--color-brand-accent-hover));
  text-decoration: underline;
}

/* Utility: icon circles / toggle chips (not full button padding) */
.bg-brand-accent {
  background-color: var(--color-brand-accent) !important;
  color: var(--color-brand-accent-text) !important;
}

.btn-secondary {
  background: var(--surface-raised, #ffffff);
  color: var(--accent-primary, var(--color-primary-blue));
  border: 1px solid var(--accent-primary, var(--color-primary-blue));
}

.btn-secondary:hover:not(:disabled):not(.disabled) {
  background: var(--color-primary-blue-light);
  border-color: var(--accent-primary-hover, var(--color-primary-blue-hover));
  color: var(--accent-primary-hover, var(--color-primary-blue-hover));
}

.btn-accent {
  background: #c2410c;
  color: white;
}

.btn-accent:hover:not(:disabled):not(.disabled) {
  background: #9a3412;
  box-shadow: var(--shadow-card-raised, var(--shadow-md));
}

.btn-success {
  background: var(--color-success-green);
  color: white;
}

.btn-success:hover:not(:disabled):not(.disabled) {
  background: var(--color-success-green-hover);
  box-shadow: 0 0 20px rgb(4 120 87 / 35%);
}

.btn-danger {
  background: var(--color-error-red);
  color: white;
}

.btn-danger:hover:not(:disabled):not(.disabled) {
  background: #b91c1c;
  box-shadow: 0 0 20px rgb(239 68 68 / 40%);
}

.btn-warning {
  background: var(--color-warning-yellow);
  color: white;
}

.btn-warning:hover:not(:disabled):not(.disabled) {
  background: #92400e;
  box-shadow: 0 0 20px rgb(180 83 9 / 35%);
}

/* ============================================================================
   LIST SPOT WIZARD NAV (page-specific IDs)
   ============================================================================ */

#nextBtn,
#submitBtn {
  background: var(--color-brand-accent);
  color: var(--color-brand-accent-text);
  box-shadow: var(--shadow-card-base, var(--shadow-card));
}

#nextBtn:hover,
#submitBtn:hover {
  background: var(--color-brand-accent-hover);
  box-shadow: var(--shadow-card-raised, var(--shadow-md));
}

#prevBtn {
  background: var(--surface-raised, #ffffff);
  color: var(--text-supporting, #475569);
  border: 1px solid var(--border-ui, #cbd5e1);
}

#prevBtn:hover {
  background: var(--surface-page, #f8fafc);
  color: var(--text-heading, #0f172a);
  border-color: var(--border-ui-strong, #94a3b8);
}

.dark #prevBtn {
  background: var(--color-dark-surface);
  color: var(--color-dark-text-muted);
  border-color: var(--color-dark-border);
}

.dark #prevBtn:hover {
  background: linear-gradient(135deg, #4b5563 0%, #6b7280 100%);
  color: #f9fafb;
}

/* ============================================================================
   BUTTON SIZES (use with .btn or a variant class)
   ============================================================================ */

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: var(--type-label-size, 0.8125rem);
  border-radius: var(--border-radius-sm);
}

.btn-lg {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  line-height: var(--line-height-snug, 1.35);
  border-radius: var(--border-radius-lg);
}

.btn-xl {
  padding: 1rem 2rem;
  font-size: 1.125rem;
  line-height: var(--line-height-snug, 1.35);
  border-radius: var(--border-radius-xl);
}

/* ============================================================================
   BUTTON STATES
   ============================================================================ */

.btn:disabled,
.btn.disabled,
.btn-primary:disabled,
.btn-primary.disabled,
.btn-brand:disabled,
.btn-brand-outline:disabled,
.btn-secondary:disabled,
.btn-secondary.disabled,
.btn-accent:disabled,
.btn-accent.disabled,
.btn-success:disabled,
.btn-success.disabled,
.btn-danger:disabled,
.btn-danger.disabled,
.btn-warning:disabled,
.btn-warning.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn:disabled:hover,
.btn.disabled:hover,
.btn-primary:disabled:hover,
.btn-primary.disabled:hover,
.btn-secondary:disabled:hover,
.btn-secondary.disabled:hover {
  transform: none;
  box-shadow: none;
}

.btn.loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

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

/* NOTE: @keyframes spin is defined in base/animations.css */

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

.btn-group {
  display: inline-flex;
  border-radius: var(--border-radius-base);
  overflow: hidden;
}

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

.btn-group .btn:first-child {
  border-top-left-radius: var(--border-radius-base);
  border-bottom-left-radius: var(--border-radius-base);
}

.btn-group .btn:last-child {
  border-top-right-radius: var(--border-radius-base);
  border-bottom-right-radius: var(--border-radius-base);
  border-right: none;
}

/* ============================================================================
   ENHANCED BUTTON (ripple + loading)
   ============================================================================ */

.btn-enhanced {
  position: relative;
  overflow: hidden;
}

.btn-enhanced::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.3s, height 0.3s;
}

.btn-enhanced:active::after {
  width: 300px;
  height: 300px;
}

.btn-enhanced:active {
  transform: scale(0.98);
}

.btn-enhanced.loading {
  pointer-events: none;
  background-color: var(--color-success-green);
  color: white;
  border-color: var(--color-success-green);
}

.success-state {
  background-color: var(--color-success-green);
  color: white;
  border-color: var(--color-success-green);
}

/* ============================================================================
   DARK MODE
   ============================================================================ */

.dark .btn-secondary {
  background: var(--color-dark-surface);
  color: var(--color-dark-text);
  border-color: var(--color-dark-border);
}

.dark .btn-secondary:hover:not(:disabled):not(.disabled) {
  background: var(--color-gray-700);
  border-color: var(--color-gray-600);
  color: var(--color-dark-text);
}

/* Mint edge keeps solid CTA from melting into near-black canvas */
.dark .btn-brand {
  border-color: rgba(94, 234, 212, 0.45);
}

.dark .btn-brand:hover:not(:disabled) {
  border-color: rgba(153, 246, 228, 0.55);
}

.dark .btn-brand:active:not(:disabled) {
  border-color: rgba(94, 234, 212, 0.35);
}

.dark .btn-brand:focus-visible {
  box-shadow: 0 0 0 3px var(--color-brand-accent-on-dark-surface-focus, rgba(94, 234, 212, 0.35)),
    var(--color-brand-accent-shadow);
}

.dark .btn-brand-outline {
  color: var(--color-brand-accent-fg, var(--color-brand-accent-on-dark-surface, #5eead4));
  border-color: var(--color-brand-accent-fg, var(--color-brand-accent-on-dark-surface, #5eead4));
}

.dark .btn-brand-outline:hover:not(:disabled) {
  color: var(--color-brand-accent-fg-hover, var(--color-brand-accent-on-dark-surface-hover, #99f6e4));
  border-color: var(--color-brand-accent-fg-hover, var(--color-brand-accent-on-dark-surface-hover, #99f6e4));
  background: var(--color-brand-accent-outline-hover);
}

.dark .btn-brand-outline:focus-visible {
  box-shadow: 0 0 0 3px var(--color-brand-accent-on-dark-surface-focus, rgba(94, 234, 212, 0.35));
}

.dark a.link-brand {
  color: var(--color-brand-accent-fg, var(--color-brand-accent-on-dark-surface, #5eead4));
}

.dark a.link-brand:hover {
  color: var(--color-brand-accent-fg-hover, var(--color-brand-accent-on-dark-surface-hover, #99f6e4));
}

/* ============================================================================
   RESPONSIVE
   ============================================================================ */

@media (width <= 640px) {
  .btn,
  .btn-primary,
  .btn-brand,
  .btn-brand-outline {
    max-width: 100%;
    white-space: normal;
    text-align: center;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    min-height: 48px;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-group .btn {
    border-radius: 0;
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  }

  .btn-group .btn:first-child {
    border-top-left-radius: var(--border-radius-base);
    border-top-right-radius: var(--border-radius-base);
    border-bottom-left-radius: 0;
  }

  .btn-group .btn:last-child {
    border-top-right-radius: 0;
    border-bottom-left-radius: var(--border-radius-base);
    border-bottom-right-radius: var(--border-radius-base);
    border-bottom: none;
  }
}

/* ============================================================================
   ACCESSIBILITY
   ============================================================================ */

.btn:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible {
  outline: 2px solid var(--color-primary-blue);
  outline-offset: 2px;
}

@media (prefers-contrast: high) {
  .btn,
  .btn-primary,
  .btn-secondary {
    border: 2px solid currentColor;
  }

  .btn-primary {
    border-color: white;
  }

  .btn-secondary {
    border-color: var(--color-gray-800);
  }
}

@media (prefers-reduced-motion: reduce) {
  .btn,
  .btn-primary,
  .btn-brand,
  .btn-brand-outline,
  .btn-secondary,
  .btn-accent,
  .btn-success,
  .btn-danger,
  .btn-warning,
  .btn-enhanced {
    transition: none;
  }

  .btn:hover,
  .btn-primary:hover,
  .btn-brand:hover,
  .btn-brand-outline:hover,
  .btn-secondary:hover,
  .btn-accent:hover,
  .btn-success:hover,
  .btn-danger:hover,
  .btn-warning:hover,
  .btn-enhanced:active {
    transform: none;
  }

  .btn-enhanced::after {
    transition: none;
  }
}