/*
 * UnlimitedModel.com Core Component Styles
 *
 * Reusable UI components styled exclusively with design tokens from tokens.css
 * (light-first). No gradients, no glassmorphism, no dark-era palette values.
 * All components include proper focus states and hover effects.
 * All animations respect prefers-reduced-motion.
 * 
 * Components:
 * 1. Buttons
 * 2. Form Inputs
 * 3. Cards
 * 4. Badges
 * 5. Alerts
 * 6. Modals
 * 7. Tooltips
 * 8. Toast Notifications
 * 9. Dropdowns
 * 10. Data Tables
 */

/* ===========================================
   1. BUTTONS
   =========================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0 var(--space-3-5);
  border-radius: var(--radius-control);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1.2;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              box-shadow var(--transition-fast),
              transform var(--transition-fast);
  min-height: 38px;
  white-space: nowrap;
  user-select: none;
}

/* ===========================================
   SURFACE CARDS
   =========================================== */

/* Card surface with subtle border and hover lift */
.card.glass {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card.glass:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.btn:disabled,
.btn[disabled],
.btn--disabled {
  /* Disabled buttons must keep readable labels: solid muted-on-light,
     never whole-button opacity (which destroys text contrast). */
  background: #e5e7eb !important;
  color: #9ca3af !important;
  border-color: transparent !important;
  box-shadow: none !important;
  transform: none !important;
  opacity: 1;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary Button - solid brand accent.
   The label color is pinned so it can never inherit a blue or
   transparent text color from surrounding markup. */
.btn-primary {
  background: var(--accent);
  color: var(--accent-text);
  border-color: transparent;
  box-shadow: var(--shadow-sm);
}

.btn-primary,
.btn-primary *,
a.btn-primary,
a.btn-primary * {
  color: var(--accent-text);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
  background: var(--accent-active);
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Secondary Button - Outlined style with transparent background */
.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-default);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-hover);
  border-color: var(--border-strong);
}

.btn-secondary:active:not(:disabled) {
  background: var(--bg-active);
}

/* Ghost Button - Text-only with subtle hover state */
.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.btn-ghost:active:not(:disabled) {
  background: var(--bg-active);
}

/* Danger Button - Red for destructive actions */
.btn-danger {
  background: var(--error);
  color: var(--text-inverse);
  border-color: transparent;
}

.btn-danger:hover:not(:disabled) {
  background: var(--error-light);
  transform: translateY(-1px);
}

.btn-danger:active:not(:disabled) {
  transform: translateY(0);
}

/* Success Button - Green for positive actions */
.btn-success {
  background: var(--success);
  color: var(--text-inverse);
  border-color: transparent;
}

.btn-success:hover:not(:disabled) {
  background: var(--success-light);
  transform: translateY(-1px);
}

.btn-success:active:not(:disabled) {
  transform: translateY(0);
}

/* Button Sizes — sm/md/lg stay on the 8px control radius and the 4px scale. */
.btn-sm {
  padding: 0 var(--space-2-5);
  font-size: var(--text-xs);
  border-radius: var(--radius-control);
  min-height: 30px;
}

.btn-lg {
  padding: 0 var(--space-5);
  font-size: var(--text-base);
  border-radius: var(--radius-control);
  min-height: 44px;
}

/* Icon Button - Square with icon */
.btn-icon {
  padding: 0;
  aspect-ratio: 1;
  min-width: 38px;
}

.btn-icon.btn-sm {
  min-width: 30px;
  min-height: 30px;
}

.btn-icon.btn-lg {
  min-width: 44px;
  min-height: 44px;
}

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

/* Button with loading state */
.btn-loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: btn-spinner var(--duration-normal) linear infinite;
}

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

/* ===========================================
   2. FORM INPUTS
   =========================================== */

.input,
.input[type="text"],
.input[type="email"],
.input[type="password"],
.input[type="search"],
.input[type="number"],
.input[type="url"],
.input[type="tel"],
textarea.input,
select.input {
  width: 100%;
  height: 40px;
  padding: 0 var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-control);
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  outline: none;
}

.input::placeholder {
  color: var(--text-muted);
}

/* Light inputs resolve to the elevated surface token */
.input-light {
  background-color: var(--bg-elevated);
}

/* Focus visible for keyboard navigation and brand-focused ring - VAL-DESIGN-005 */
.input:focus,
.input:focus-visible {
  border-color: var(--brand-mid); /* 2px solid var(--brand-primary) */
  box-shadow: 0 0 0 3px var(--accent-light);
}

.input:disabled,
.input--disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background-color: var(--bg-elevated);
}

/* Input Error State - red border with error text below */
.input--error,
.input-error {
  border-color: var(--error) !important; /* border-red-500 */
}

.input--error:focus,
.input-error:focus,
.input--error:focus-visible,
.input-error:focus-visible {
  box-shadow: 0 0 0 3px var(--error-bg);
}

/* Valid state - green left border accent */
.input--valid,
.input-valid {
  border-color: var(--success);
}

.input--valid:focus,
.input-valid:focus,
.input--valid:focus-visible,
.input-valid:focus-visible {
  box-shadow: 0 0 0 3px var(--success-bg);
}

/* Input Sizes — the standard control is 40px; lg/sm stay on the same anatomy. */
.input--lg {
  height: 44px;
  padding: 0 var(--space-3);
  font-size: var(--text-base);
}

.input--sm {
  height: 38px;
  padding: 0 var(--space-3);
  font-size: var(--text-sm);
}

/* Input with icon (search-icon) */
.input-icon-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon-wrapper .input {
  padding-left: 40px;
}

.input-icon {
  position: absolute;
  left: var(--space-3);
  color: var(--text-muted);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.input-icon-right {
  position: absolute;
  right: var(--space-3);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: auto;
  cursor: pointer;
}

.input-icon-right:hover {
  color: var(--text-secondary);
}

/* Password toggle icon */
.input-password-toggle {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 4px 8px;
  display: flex;
  align-items: center;
}

.input-password-toggle:hover {
  color: var(--text-secondary);
}

/* Textarea */
textarea.input {
  min-height: 100px;
  height: auto;
  resize: vertical;
  max-height: 400px;
}

textarea.input--fixed {
  resize: none;
}

/* Select */
select.input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
  cursor: pointer;
}

select.input:disabled {
  cursor: not-allowed;
}

/* File Upload Input Wrapper */
.file-input-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.file-input-wrapper .input {
  appearance: none;
  width: 100%;
  height: 40px;
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  background: transparent;
}

/* Hidden file input */
.file-input-hidden {
  position: absolute;
  width: 0.1px;
  height: 0.1px;
  opacity: 0;
  pointer-events: none;
}

/* File upload drag and drop styling */
.file-upload-drop-zone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
  color: var(--text-muted);
  background: var(--bg-surface);
}

.file-upload-drop-zone.drag-active {
  border-color: var(--brand-mid);
  background: var(--accent-light);
}

/* Range input */
input[type="range"].input {
  height: 6px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
}

input[type="range"].input::-webkit-slider-track {
  height: 6px;
  background: var(--border-default);
  border-radius: var(--radius-full);
}

input[type="range"].input::-webkit-slider-thumb {
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--brand-mid);
  border-radius: 50%;
  cursor: pointer;
  margin-top: -6px;
  transition: transform var(--transition-fast);
}

input[type="range"].input::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

input[type="range"].input:focus-visible {
  outline: none;
}

input[type="range"].input:focus-visible::-webkit-slider-thumb {
  box-shadow: var(--focus-ring);
}

/* ===========================================
   FORM LABELS & GROUPS
   =========================================== */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.form-label--required::after {
  content: ' *';
  color: var(--error);
}

.form-hint {
  display: block;
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.form-error {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--error);
  margin-top: var(--space-1);
}

.form-error svg {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
}

.form-row {
  display: grid;
  gap: var(--space-4);
}

.form-row--2col {
  grid-template-columns: repeat(2, 1fr);
}

.form-row--3col {
  grid-template-columns: repeat(3, 1fr);
}

.form-row--4col {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
  .form-row--2col,
  .form-row--3col,
  .form-row--4col {
    grid-template-columns: 1fr;
  }
}

.form-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-6);
}

.form-actions--end {
  justify-content: flex-end;
}

/* Bare controls inside a form group resolve to the SAME anatomy as .input, so
   no form anywhere falls back to a raw native control. */
.form-group input:not([type="checkbox"]):not([type="radio"]),
.form-group select,
.form-group textarea {
  width: 100%;
  height: 40px;
  padding: 0 var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-control);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group textarea {
  height: auto;
  min-height: 100px;
  padding: var(--space-3);
  resize: vertical;
}

/* Selects get a token chevron instead of the OS control. */
.form-group select {
  appearance: none;
  padding-right: var(--space-8);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23667085' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  cursor: pointer;
}

.form-group input:not([type="checkbox"]):not([type="radio"]):focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
}

.form-check {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.form-check .input {
  width: auto;
}

/* ===========================================
   3. CARDS - Solid Surfaces with Hover Lift
   =========================================== */

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-4);
  overflow: hidden;
  transition: box-shadow var(--transition-base),
              border-color var(--transition-base);
}

/* Every card-like surface on the site shares ONE anatomy (background, 1px
   border, 12px radius, one subtle shadow). Page stylesheets own the internals. */
.stat-card,
.model-card,
.plan-card,
.feature-card,
.docs-card,
.key-item,
.info-panel {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

/* Flush variant: no elevation, border only. */
.card--flat {
  box-shadow: none;
  border: 1px solid var(--border);
}

/* Retry action used by the network/error states */
.btn-retry {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 38px;
  padding: 0 var(--space-3-5);
  border-radius: var(--radius-control);
  border: 1px solid transparent;
  background: var(--accent);
  color: var(--accent-text);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-retry:hover { background: var(--accent-hover); }
.btn-retry:active { background: var(--accent-active); }
.btn-retry:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-retry svg { width: 16px; height: 16px; }

.btn-retry--secondary {
  background: var(--bg-elevated);
  border-color: var(--border-default);
  color: var(--text-primary);
}

.btn-retry--secondary:hover { background: var(--bg-hover); border-color: var(--border-strong); }

/* Card Padding Variants */
.card--padded {
  padding: var(--space-6);
}

.card--compact {
  padding: var(--space-4);
}

/* Interactive Card - Hover lift with shadow-lg transform translate-y */
.card--interactive {
  cursor: pointer;
}

.card--interactive:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-default);
}

.card--interactive:active {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Card with header */
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin: 0;
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.card-body {
  padding: var(--space-5);
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-subtle);
}

/* Card Grid */
.card-grid {
  display: grid;
  gap: var(--space-4);
}

.card-grid--2col {
  grid-template-columns: repeat(2, 1fr);
}

.card-grid--3col {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid--4col {
  grid-template-columns: repeat(4, 1fr);
}

.card-grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

@media (max-width: 768px) {
  .card-grid--2col,
  .card-grid--3col,
  .card-grid--4col {
    grid-template-columns: 1fr;
  }
}

/* ===========================================
   5. ALERTS - CONTAINER STYLING
   =========================================== */

.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  line-height: 1.5;
  border: 1px solid transparent;
}

.alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-1);
}

.alert-message {
  color: inherit;
  opacity: 0.9;
}

.alert-close {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: inherit;
  opacity: 0.6;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: opacity var(--transition-fast), background var(--transition-fast);
}

.alert-close:hover {
  opacity: 1;
  background: var(--bg-hover);
}

/* Success Alert */
.alert--success,
.alert-success {
  background: var(--success-bg);
  border-color: var(--success-border);
  color: var(--success);
}

/* Warning Alert */
.alert--warning,
.alert-warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  color: var(--warning);
}

/* Error Alert */
.alert--error,
.alert-error {
  background: var(--error-bg);
  border-color: var(--error-border);
  color: var(--error);
}

/* Info Alert */
.alert--info,
.alert-info {
  background: var(--info-bg);
  border-color: var(--info-border);
  color: var(--info);
}

/* ===========================================
   6. MODALS
   =========================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--overlay-scrim);
  z-index: var(--z-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal-backdrop.closing {
  opacity: 0;
}

.modal {
  position: relative;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-modal);
  box-shadow: var(--shadow-2xl);
  width: 100%;
  max-height: calc(100vh - var(--space-12));
  display: flex;
  flex-direction: column;
  transform: scale(0.95) translateY(10px);
  opacity: 0;
  transition: transform var(--transition-slow) var(--ease-out),
              opacity var(--transition-slow) var(--ease-out);
}

.modal-backdrop.open .modal {
  transform: scale(1) translateY(0);
  opacity: 1;
}

.modal-backdrop.closing .modal {
  transform: scale(0.95) translateY(10px);
  opacity: 0;
}

/* Admin panel uses .modal-overlay as its container class (see admin.html);
   both container variants must animate the dialog in, or it stays invisible. */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-scrim);
  z-index: var(--z-modal-backdrop);
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}
.modal-overlay.open {
  display: flex;
  animation: overlay-scrim-in var(--transition-slow) var(--ease-out);
}
.modal-overlay .modal {
  overflow-y: auto;
  overscroll-behavior: contain;
}
.modal-overlay.open .modal {
  transform: scale(1) translateY(0);
  opacity: 1;
  animation: modal-overlay-in var(--transition-slow) var(--ease-out);
}
@keyframes overlay-scrim-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes modal-overlay-in {
  from { transform: scale(0.95) translateY(12px); opacity: 0; }
  to { transform: scale(1) translateY(0); opacity: 1; }
}
.modal-overlay.closing .modal {
  transform: scale(0.95) translateY(10px);
  opacity: 0;
}

/* Modal Sizes */
.modal--sm { max-width: 400px; }
.modal--md { max-width: 560px; }
.modal--lg { max-width: 720px; }
.modal--xl { max-width: 900px; }
.modal--full { max-width: calc(100vw - var(--space-12)); }
/* Legacy single-dash aliases: without a max-width, .modal (width: 100%)
   stretches edge to edge. Keep so a typo'd class can't fill the screen. */
.modal-sm { max-width: 400px; }
.modal-md { max-width: 560px; }

/* Solid-surface Modal Variant (retired glass variant resolves to tokens) */
.modal--glass {
  background: var(--glass-bg);
  border-color: var(--glass-border);
}

/* Modal Header */
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin: 0;
}

.modal-subtitle {
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-top: var(--space-1);
}

.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
  flex-shrink: 0;
  margin-left: auto;
}

.modal-close:hover {
  background: var(--bg-elevated);
  color: var(--text-primary);
}

.modal-close:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.modal-close svg {
  width: 18px;
  height: 18px;
}

/* Modal Body */
.modal-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
}

.modal-body--flush {
  padding: 0;
}

/* Modal Footer */
.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
  flex-shrink: 0;
}

.modal-footer--start {
  justify-content: flex-start;
}

.modal-footer--between {
  justify-content: space-between;
}

/* ===========================================
   7. TOOLTIPS
   =========================================== */

.tooltip-container {
  position: relative;
  display: inline-flex;
}

.tooltip-content {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 8px);
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--text-primary);
  white-space: nowrap;
  max-width: 280px;
  white-space: normal;
  text-align: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-fast),
              visibility var(--transition-fast),
              transform var(--transition-fast);
  z-index: var(--z-tooltip);
  pointer-events: none;
}

.tooltip-content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--border-default);
}

/* Tooltip Position Variants */
.tooltip-content--top {
  bottom: calc(100% + 8px);
  top: auto;
}

.tooltip-content--bottom {
  top: calc(100% + 8px);
  bottom: auto;
}

.tooltip-content--bottom::after {
  top: auto;
  bottom: 100%;
  border-top-color: transparent;
  border-bottom-color: var(--border-default);
}

.tooltip-content--left {
  left: auto;
  right: calc(100% + 8px);
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
}

.tooltip-content--left::after {
  top: 50%;
  left: 100%;
  transform: translateY(-50%);
  border-top-color: transparent;
  border-left-color: var(--border-default);
}

.tooltip-content--right {
  left: calc(100% + 8px);
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
}

.tooltip-content--right::after {
  top: 50%;
  left: auto;
  right: 100%;
  transform: translateY(-50%);
  border-top-color: transparent;
  border-right-color: var(--border-default);
}

/* Tooltip Visible State */
.tooltip-container.open .tooltip-content,
[data-tooltip]:hover + .tooltip-content {
  opacity: 1;
  visibility: visible;
}

.tooltip-container.open .tooltip-content--top,
[data-tooltip]:hover + .tooltip-content--top {
  transform: translateX(-50%) translateY(-4px);
}

.tooltip-container.open .tooltip-content--bottom,
[data-tooltip]:hover + .tooltip-content--bottom {
  transform: translateX(-50%) translateY(4px);
}

.tooltip-container.open .tooltip-content--left,
[data-tooltip]:hover + .tooltip-content--left {
  transform: translateY(-50%) translateX(-4px);
}

.tooltip-container.open .tooltip-content--right,
[data-tooltip]:hover + .tooltip-content--right {
  transform: translateY(-50%) translateX(4px);
}

/* Tooltip Variants */
.tooltip-content--error {
  background: var(--error-bg);
  color: var(--error);
  border-color: var(--error-border);
}

.tooltip-content--error::after {
  border-top-color: var(--error-border);
}

.tooltip-content--success {
  background: var(--success-bg);
  color: var(--success);
  border-color: var(--success-border);
}

.tooltip-content--success::after {
  border-top-color: var(--success-border);
}

/* ===========================================
   8. TOAST NOTIFICATIONS
   =========================================== */

.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-3);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  font-size: var(--text-sm);
  max-width: 400px;
  pointer-events: auto;
  animation: toast-in var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.toast-exit {
  animation: toast-out var(--duration-normal) var(--ease-out) forwards;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.toast-content {
  flex: 1;
  min-width: 0;
}

.toast-title {
  font-weight: var(--font-semibold);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.toast-message {
  color: var(--text-secondary);
  line-height: 1.5;
}

.toast-close {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.toast-close:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.toast-close:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.toast-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--brand-mid);
  transition: width linear;
}

/* Toast Variants */
.toast-success, .toast--success {
  border-color: var(--success-border);
}

.toast-success .toast-icon, .toast--success .toast-icon {
  color: var(--success);
}

.toast-success .toast-progress, .toast--success .toast-progress {
  background: var(--success);
}

.toast-warning, .toast--warning {
  border-color: var(--warning-border);
}

.toast-warning .toast-icon, .toast--warning .toast-icon {
  color: var(--warning);
}

.toast-warning .toast-progress, .toast--warning .toast-progress {
  background: var(--warning);
}

.toast-error, .toast--error {
  border-color: var(--error-border);
}

.toast-error .toast-icon, .toast--error .toast-icon {
  color: var(--error);
}

.toast-error .toast-progress, .toast--error .toast-progress {
  background: var(--error);
}

.toast-info, .toast--info {
  border-color: var(--info-border);
}

.toast-info .toast-icon, .toast--info .toast-icon {
  color: var(--info);
}

.toast-info .toast-progress, .toast--info .toast-progress {
  background: var(--info);
}

/* ===========================================
   9. DROPDOWNS - Arrow Icon and Glass Morphism
   =========================================== */

.dropdown {
  position: relative;
  display: inline-flex;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 180px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--space-1);
  z-index: var(--z-dropdown);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition-fast),
              visibility var(--transition-fast),
              transform var(--transition-fast);
}

.dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Dropdown positioning variants */
.dropdown-menu--right {
  left: auto;
  right: 0;
}

.dropdown-menu--up {
  top: auto;
  bottom: calc(100% + 4px);
}

.dropdown-menu--up.open .dropdown-menu {
  transform: translateY(8px);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.dropdown-item:hover {
  background: var(--bg-hover);
}

.dropdown-item:focus-visible {
  outline: none;
  background: var(--bg-hover);
  box-shadow: var(--focus-ring);
}

.dropdown-item--disabled,
.dropdown-item:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.dropdown-item--danger {
  color: var(--error);
}

.dropdown-item--danger:hover {
  background: var(--error-bg);
}

.dropdown-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: var(--space-1) 0;
}

.dropdown-header {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

/* ===========================================
   REDUCED MOTION SUPPORT - VAL-DESIGN-006
   =========================================== */

@media (prefers-reduced-motion: reduce) {
  /* Disable button animations */
  .btn {
    transition: none;
  }
  
  .btn:hover:not(:disabled) {
    transform: none;
  }
  
  .btn:active:not(:disabled) {
    transform: none;
  }
  
  .btn-loading::after {
    animation: none;
  }
  
  /* Disable input animations */
  .input,
  textarea.input,
  select.input {
    transition: none;
  }
  
  /* Disable card animations */
  .card {
    transition: none;
  }
  
  .card--interactive:hover {
    transform: none;
  }
  
  /* Disable modal animations */
  .modal-backdrop,
  .modal-overlay {
    transition: none;
  }
  
  .modal-backdrop.open,
  .modal-backdrop.closing {
    opacity: 1;
    visibility: visible;
  }
  
  .modal {
    transition: none;
    transform: scale(1) translateY(0);
    opacity: 1;
  }
  
  /* Disable toast animations */
  .toast {
    animation: none;
  }
  
  .toast-exit {
    animation: none;
    opacity: 0;
  }
  
  /* Disable dropdown animations */
  .dropdown-menu {
    transition: none;
    transform: translateY(0);
  }
  
  .dropdown.open .dropdown-menu {
    transform: translateY(0);
  }
  
  /* Disable tooltip animations */
  .tooltip-content {
    transition: none;
  }
  
  .tooltip-container.open .tooltip-content--top,
  .tooltip-container.open .tooltip-content--bottom,
  .tooltip-container.open .tooltip-content--left,
  .tooltip-container.open .tooltip-content--right {
    transform: translateX(-50%) translateY(0);
  }
  
  /* Disable all transform animations */
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===========================================
   FOCUS STATES - VAL-DESIGN-005
   =========================================== */

/* Ensure all interactive elements have visible focus states */
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 var(--focus-ring-offset) var(--brand-mid);
}

/* ===========================================
   FILE UPLOAD COMPONENT
   =========================================== */

/* File upload with drag-and-drop styling */
.file-upload {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

.file-upload.drag-active {
  border-color: var(--brand-mid);
  background: var(--accent-light);
}

.file-upload svg {
  width: 40px;
  height: 40px;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
}

.file-upload p {
  color: var(--text-secondary);
  margin: 0;
  font-size: var(--text-sm);
}

.file-upload sub {
  color: var(--text-muted);
  font-size: var(--text-xs);
}

/* Hidden file input */
.file-input {
  position: absolute;
  width: 0.1px;
  height: 0.1px;
  opacity: 0;
  pointer-events: none;
}

/* File list */
.file-list {
  margin-top: var(--space-2);
  max-height: 200px;
  overflow-y: auto;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2);
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  margin-bottom: var(--space-1);
}

.file-item-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-item-remove {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--error-bg);
  border-radius: var(--radius-sm);
  color: var(--error);
  cursor: pointer;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.file-item-remove:hover {
  opacity: 1;
}

/* ===========================================
   DATA TABLE ENHANCEMENTS
   =========================================== */

/* Data table scroll container */
.data-table-scroll {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: visible;
}

/* Custom scrollbar for horizontal scroll */
.data-table-scroll::-webkit-scrollbar {
  height: 8px;
}

.data-table-scroll::-webkit-scrollbar-track {
  background: var(--bg-surface);
  border-radius: var(--radius-full);
}

.data-table-scroll::-webkit-scrollbar-thumb {
  background: var(--border-strong);
  border-radius: var(--radius-full);
}

.data-table-scroll::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}

/* Sticky header row */
.data-table {
  width: 100%;
  border-collapse: collapse;
}

.data-table thead {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg-elevated);
}

.data-table th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border-default);
  white-space: nowrap;
}

.data-table tbody tr {
  transition: background var(--transition-fast);
}

/* Row hover - subtle background change */
.data-table tbody tr:hover td {
  background: var(--bg-hover);
}

/* Row focus state */
.data-table tbody tr:focus-visible {
  outline: 2px solid var(--brand-mid);
  outline-offset: -2px;
}

.data-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  font-size: var(--text-sm);
  color: var(--text-primary);
  vertical-align: middle;
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* Striped rows with subtle contrast */
.data-table.striped tbody tr:nth-child(even) td {
  background: var(--bg-elevated);
}

.data-table.striped tbody tr:nth-child(even):hover td {
  background: var(--bg-hover);
}

/* ===========================================
   BADGES - PILL SHAPE
   =========================================== */

/* Pill-shaped badges (8rem padding 0.25rem) */
.badge-pill {
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
}

.badge--sm {
  padding: 2px var(--space-1);
  font-size: 10px;
}

.badge--lg {
  padding: var(--space-1-5) var(--space-3);
  font-size: var(--text-sm);
}

/* Status colors for badges */
.badge--success,
.badge-success {
  background: var(--success-bg);
  color: var(--success);
  border-color: var(--success-border);
}

.badge--warning,
.badge-warning {
  background: var(--warning-bg);
  color: var(--warning);
  border-color: var(--warning-border);
}

.badge--error,
.badge-error {
  background: var(--error-bg);
  color: var(--error);
  border-color: var(--error-border);
}

.badge--info,
.badge-info {
  background: var(--info-bg);
  color: var(--info);
  border-color: var(--info-border);
}

.badge--neutral,
.badge-neutral {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border-color: var(--border-default);
}

/* ===========================================
   CHECKBOX & RADIO BUTTONS
   =========================================== */

/* Checkbox input */
input[type="checkbox"].input {
  width: 18px;
  height: 18px;
  accent-color: var(--brand-mid);
  cursor: pointer;
}

input[type="checkbox"].input:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* Checkbox variant with custom styling */
.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
}

.checkbox-wrapper input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-wrapper .checkbox {
  width: 20px;
  height: 20px;
  min-width: 20px;
  min-height: 20px;
  border: 2px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.checkbox-wrapper:hover .checkbox {
  border-color: var(--brand-mid);
}

.checkbox-wrapper input:checked + .checkbox::after {
  content: '';
  width: 6px;
  height: 10px;
  border: solid var(--text-primary);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.checkbox-wrapper input:disabled + .checkbox {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Radio button */
input[type="radio"].input {
  width: 18px;
  height: 18px;
  accent-color: var(--brand-mid);
  cursor: pointer;
}

input[type="radio"].input:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

/* Links focus state */
a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

/* Custom focus ring for specific elements */
.btn:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.btn-ghost:focus-visible,
.btn-danger:focus-visible,
.btn-success:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

.badge:focus-visible,
.badge--success:focus-visible,
.badge--warning:focus-visible,
.badge--error:focus-visible,
.badge--info:focus-visible,
.badge--neutral:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

/* Remove default focus outline where we use box-shadow */
button:focus:not(:focus-visible),
input:focus:not(:focus-visible),
select:focus:not(:focus-visible),
textarea:focus:not(:focus-visible) {
  outline: none;
  box-shadow: none;
}

/* ===========================================
   MOBILE TOUCH TARGETS - WCAG AA Requirement
   =========================================== */

/* Minimum touch target size for mobile devices (44x44px) */
@media (max-width: 768px) {
  /* Buttons */
  .btn {
    min-height: 44px;
    min-width: 44px;
  }
  
  .btn-sm {
    min-height: 36px;
    min-width: 36px;
  }
  
  .btn-lg {
    min-height: 52px;
    min-width: 52px;
  }
  
  /* Icon buttons - ensure minimum touch target */
  .btn-icon {
    min-width: 44px;
    min-height: 44px;
  }
  
  /* Form inputs */
  .input,
  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="search"],
  input[type="number"],
  select.input,
  textarea.input {
    min-height: 44px;
    font-size: 16px; /* Prevents iOS zoom on focus */
  }
  
  /* Checkbox and radio - larger touch targets */
  input[type="checkbox"].input,
  input[type="radio"].input {
    width: 24px;
    height: 24px;
    min-width: 24px;
    min-height: 24px;
  }
  
  /* Sidebar navigation items */
  .sidebar-nav-item,
  .sidebar-link {
    min-height: 44px;
    padding: var(--space-3) var(--space-4);
  }
  
  /* Modal close button */
  .modal-close {
    min-width: 44px;
    min-height: 44px;
  }
  
  /* Toast close button */
  .toast-close {
    min-width: 44px;
    min-height: 44px;
  }
  
  /* Alert close button */
  .alert-close {
    min-width: 44px;
    min-height: 44px;
  }
  
  /* Table pagination buttons */
  .table-page-btn {
    min-width: 44px;
    min-height: 44px;
  }
  
  /* Mobile header toggle */
  .mobile-header-toggle {
    min-width: 44px;
    min-height: 44px;
  }
  
  /* Dropdown items */
  .dropdown-item {
    min-height: 44px;
    padding: var(--space-3) var(--space-4);
  }
  
  /* Card interactive areas */
  .card--interactive {
    min-height: 44px;
  }
  
  /* Chat composer send button */
  .chat-composer-send,
  .chat-composer-stop {
    min-width: 44px;
    min-height: 44px;
  }
}

/* ===========================================
   ICON-ONLY BUTTON ACCESSIBILITY
   =========================================== */

/* Icon-only buttons must have aria-label for screen readers */
.btn-icon[aria-label],
.btn-icon[data-tooltip] {
  position: relative;
}

/* Ensure icon-only buttons maintain minimum touch target on mobile */
@media (max-width: 768px) {
  .btn-icon[aria-label]:not(:has(> span:not(.sr-only))) {
    min-width: 44px;
    min-height: 44px;
  }
}

/* ===========================================
   COLOR CONTRAST - TOKEN-DRIVEN TEXT COLORS
   =========================================== */

.text-primary {
  color: var(--text-primary);
}

.text-secondary {
  color: var(--text-secondary);
}

.text-muted {
  color: var(--text-muted);
}

/* Brand colors resolved to the accent token family */
.brand-start { color: var(--brand-start); }
.brand-mid { color: var(--accent); }
.brand-end { color: var(--brand-end); }
.accent-glow { color: var(--accent-glow); }

/* Status colors resolve to the status token family */
.text-success { color: var(--success-light); }
.text-warning { color: var(--warning-light); }
.text-error { color: var(--error-light); }
.text-info { color: var(--info-light); }

/* Ensure links use the accent token.
   :where() keeps specificity at a single type selector so styled anchors
   (.btn-primary, .nav-link, .footer-link, ...) always win the cascade.
   The bare a:not(.btn) form added :not()'s class specificity (0,1,1) and
   overrode every styled anchor — that was the "blank blue button" bug. */
a:where(:not(.btn)) {
  color: var(--accent);
}

a:where(:not(.btn)):hover {
  color: var(--accent-hover);
}

/* Focus indicators must have sufficient contrast */
:focus-visible {
  box-shadow: 0 0 0 var(--focus-ring-offset) var(--focus-ring-color);
}

/* High contrast mode - strengthen borders and focus indicators */
@media (prefers-contrast: high) {
  .text-secondary,
  .text-muted {
    color: var(--gray-700); /* Increase contrast for high contrast mode */
  }

  :focus-visible {
    box-shadow: var(--focus-ring);
    outline: 2px solid var(--border-focus);
  }
}