/* ============================================
   BUTTONS
   ============================================ */

/* Prompt 42 PR #24 Phase 3: button treatment.
   Flat surfaces, 1px borders, no translateY hover, no shadow-primary glow.
   Radii: tighter (radius-md = 6px, was radius-xl = 16px). */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: var(--leading-none);
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 200ms ease, border-color 200ms ease, color 200ms ease, box-shadow 200ms ease;
  white-space: nowrap;
}

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

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

/* Primary Button */
.btn-primary {
  background: var(--brand-primary);
  color: #FFFFFF;
  border: 1px solid var(--brand-primary-hover);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--brand-primary-hover);
  box-shadow: var(--shadow-md);
}

/* Secondary Button */
.btn-secondary {
  background: var(--bg-surface);
  color: var(--brand-primary-hover);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--brand-primary);
  background: var(--brand-accent-soft);
}

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

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

/* Success Button — semantic green stays put */
.btn-success {
  background: var(--color-success);
  color: #FFFFFF;
  border: 1px solid #3D8A4D;
}

.btn-success:hover:not(:disabled) {
  background: #3D8A4D;
}

/* Danger Button — semantic red stays put */
.btn-danger {
  background: var(--color-error);
  color: #FFFFFF;
  border: 1px solid #A03530;
}

.btn-danger:hover:not(:disabled) {
  background: #A03530;
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* Icon Button */
.btn-icon {
  padding: var(--space-3);
  border-radius: var(--radius-full);
}

.btn-icon.btn-sm {
  padding: var(--space-2);
}

.btn-icon.btn-lg {
  padding: var(--space-4);
}

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

.card {
  /* Prompt 42 PR #24 Phase 8: card hierarchy. Flat surface + 1px border
     + small shadow. Tighter radius (was 2xl/24px → lg/8px). */
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: background-color 200ms ease, border-color 200ms ease, box-shadow 200ms ease;
}

.card-interactive {
  cursor: pointer;
}

.card-interactive:hover {
  /* Prompt 42 PR #24: dropped translateY(-4px) bouncy hover. Color +
     border + shadow change is enough. */
  border-color: var(--brand-primary-soft);
  box-shadow: var(--shadow-card-hover);
}

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

.card-footer {
  padding: var(--space-4) var(--space-5);
  background: var(--color-neutral-50);
  border-top: 1px solid var(--color-neutral-100);
}

/* ============================================
   RECIPE CARD - The star component
   ============================================ */

.recipe-card {
  position: relative;
  background: var(--color-neutral-0);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition-all);
  cursor: pointer;
}

.recipe-card:hover {
  /* Prompt 42 PR #24: no translateY/scale bounce. */
  border-color: var(--brand-primary-soft);
  box-shadow: var(--shadow-card-hover);
}

.recipe-card__image-container {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.recipe-card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease;
}

.recipe-card:hover .recipe-card__image {
  transform: scale(1.08);
}

.recipe-card__badge {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-500);
  color: white;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
}

.recipe-card__save-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: none;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  cursor: pointer;
  transition: var(--transition-all);
  opacity: 0;
  transform: scale(0.8);
}

.recipe-card:hover .recipe-card__save-btn {
  opacity: 1;
  transform: scale(1);
}

.recipe-card__save-btn:hover {
  background: var(--color-primary-500);
  color: white;
}

.recipe-card__save-btn.saved {
  opacity: 1;
  background: var(--color-primary-500);
  color: white;
}

.recipe-card__content {
  padding: var(--space-4) var(--space-5) var(--space-5);
}

.recipe-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-neutral-900);
  margin: 0 0 var(--space-1);
  line-height: var(--leading-tight);
}

.recipe-card__cuisine {
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
  margin: 0;
}

.recipe-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-neutral-100);
}

.recipe-card__meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  color: var(--color-neutral-500);
}

.recipe-card__meta-item i {
  width: 14px;
  color: var(--color-primary-400);
}

/* Quick action overlay on hover */
.recipe-card__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  transition: var(--transition-base);
}

.recipe-card:hover .recipe-card__overlay {
  opacity: 1;
}

.recipe-card__actions {
  display: flex;
  gap: var(--space-2);
  transform: translateY(10px);
  transition: var(--transition-base);
}

.recipe-card:hover .recipe-card__actions {
  transform: translateY(0);
}

/* ============================================
   INPUTS & FORMS
   ============================================ */

.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.input-label {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-neutral-700);
}

.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-neutral-900);
  background: var(--color-neutral-0);
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-xl);
  transition: var(--transition-colors);
}

.input::placeholder {
  color: var(--color-neutral-400);
}

.input:hover {
  border-color: var(--color-neutral-300);
}

.input:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

/* Search Input */
.search-input-container {
  position: relative;
  width: 100%;
  max-width: 600px;
}

.search-input {
  width: 100%;
  padding: var(--space-4) var(--space-6);
  padding-left: var(--space-12);
  font-size: var(--text-lg);
  background: var(--color-neutral-0);
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-all);
}

.search-input:focus {
  border-color: var(--color-primary-500);
  box-shadow: var(--shadow-xl), 0 0 0 3px var(--color-primary-100);
}

.search-input-icon {
  position: absolute;
  left: var(--space-5);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-neutral-400);
}

/* ============================================
   FILTER PILLS
   ============================================ */

.filter-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-neutral-600);
  background: var(--color-neutral-0);
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition-all);
  white-space: nowrap;
}

.filter-pill:hover {
  border-color: var(--color-neutral-300);
  background: var(--color-neutral-50);
}

.filter-pill.active {
  background: var(--color-primary-500);
  border-color: var(--color-primary-500);
  color: white;
}

.filter-pill.active:hover {
  background: var(--color-primary-600);
  border-color: var(--color-primary-600);
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

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

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-neutral-900);
  color: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  pointer-events: auto;
  animation: toast-in 300ms ease forwards;
}

.toast.toast-out {
  animation: toast-out 300ms ease forwards;
}

.toast-success {
  background: var(--color-secondary-600);
}

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

.toast-info {
  background: var(--color-primary-500);
}

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

.toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.toast-message {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
}

.toast-close {
  flex-shrink: 0;
  padding: var(--space-1);
  background: transparent;
  border: none;
  color: white;
  opacity: 0.7;
  cursor: pointer;
  transition: var(--transition-fast);
}

.toast-close:hover {
  opacity: 1;
}

@keyframes toast-in {
  from {
    transform: translateX(100%) scale(0.9);
    opacity: 0;
  }
  to {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
}

@keyframes toast-out {
  from {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
  to {
    transform: translateX(100%) scale(0.9);
    opacity: 0;
  }
}

/* ============================================
   LOADING STATES - Skeleton loaders
   ============================================ */

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-neutral-200) 25%,
    var(--color-neutral-100) 50%,
    var(--color-neutral-200) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text {
  height: 1em;
  margin-bottom: 0.5em;
}

.skeleton-text:last-child {
  width: 70%;
}

.skeleton-image {
  aspect-ratio: 4/3;
}

.skeleton-circle {
  border-radius: var(--radius-full);
}

/* Spinner */
.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-neutral-200);
  border-top-color: var(--color-primary-500);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 4px;
}

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

/* ============================================
   EMPTY STATES
   ============================================ */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-16) var(--space-6);
}

.empty-state__illustration {
  font-size: 80px;
  margin-bottom: var(--space-6);
  opacity: 0.8;
}

.empty-state__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-neutral-900);
  margin: 0 0 var(--space-3);
}

.empty-state__description {
  font-size: var(--text-base);
  color: var(--color-neutral-500);
  max-width: 400px;
  margin: 0 0 var(--space-8);
  line-height: var(--leading-relaxed);
}

.empty-state__actions {
  display: flex;
  gap: var(--space-4);
}

/* ============================================
   MODAL
   ============================================ */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  transition: var(--transition-base);
}

.modal-backdrop.active {
  opacity: 1;
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.95);
  z-index: var(--z-modal);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  background: var(--color-neutral-0);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  opacity: 0;
  transition: var(--transition-base);
  overflow: hidden;
}

.modal.active {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-neutral-100);
}

.modal__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-neutral-900);
  margin: 0;
}

.modal__close {
  padding: var(--space-2);
  background: transparent;
  border: none;
  color: var(--color-neutral-400);
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.modal__close:hover {
  background: var(--color-neutral-100);
  color: var(--color-neutral-600);
}

.modal__body {
  padding: var(--space-6);
  overflow-y: auto;
}

.modal__footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-5) var(--space-6);
  border-top: 1px solid var(--color-neutral-100);
  background: var(--color-neutral-50);
}

/* ============================================
   BADGE / TAG
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-md);
}

.badge-primary {
  background: var(--color-primary-100);
  color: var(--color-primary-700);
}

.badge-secondary {
  background: var(--color-secondary-100);
  color: var(--color-secondary-700);
}

.badge-accent {
  background: var(--color-accent-100);
  color: var(--color-accent-700);
}

.badge-neutral {
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
}

/* ============================================
   INGREDIENTS LIST - Critical fix
   ============================================ */

.ingredients-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.ingredient-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-neutral-100);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-neutral-800);
}

.ingredient-item:last-child {
  border-bottom: none;
}

.ingredient-checkbox {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  accent-color: var(--color-primary-500);
}

.ingredient-quantity {
  font-weight: var(--font-semibold);
  color: var(--color-primary-600);
  min-width: 80px;
}

.ingredient-name {
  color: var(--color-neutral-800);
  flex: 1;
}

.ingredient-note {
  color: var(--color-neutral-500);
  font-size: var(--text-sm);
  font-style: italic;
}

.ingredient-item.checked {
  opacity: 0.5;
}

.ingredient-item.checked .ingredient-name {
  text-decoration: line-through;
}

/* ============================================
   PROGRESS BAR
   ============================================ */

.progress {
  width: 100%;
  height: 8px;
  background: var(--color-neutral-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  background: var(--color-secondary-500);
  border-radius: var(--radius-full);
  transition: width 500ms ease;
}

/* ============================================
   SECTION HEADERS
   ============================================ */

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-neutral-900);
  margin: 0;
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-neutral-500);
  margin: var(--space-1) 0 0;
}

.section-link {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-primary-500);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-1);
  transition: var(--transition-colors);
}

.section-link:hover {
  color: var(--color-primary-600);
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }

.text-primary { color: var(--color-primary-500); }
.text-secondary { color: var(--color-secondary-500); }
.text-muted { color: var(--color-neutral-500); }

.bg-primary { background-color: var(--bg-primary); }
.bg-secondary { background-color: var(--bg-secondary); }

.rounded-full { border-radius: var(--radius-full); }
.rounded-2xl { border-radius: var(--radius-2xl); }

.shadow-card { box-shadow: var(--shadow-card); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   ALERTS & MESSAGES
   ============================================ */

.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: var(--leading-relaxed);
}

.alert-icon {
  flex-shrink: 0;
  font-size: var(--text-lg);
}

.alert-content {
  flex: 1;
}

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

.alert-info {
  background: var(--color-primary-50);
  color: var(--color-primary-800);
  border: 1px solid var(--color-primary-200);
}

.alert-success {
  background: var(--color-secondary-50);
  color: var(--color-secondary-800);
  border: 1px solid var(--color-secondary-200);
}

.alert-warning {
  background: var(--color-accent-50);
  color: var(--color-accent-800);
  border: 1px solid var(--color-accent-200);
}

.alert-danger {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* ============================================
   FORM FIELD GROUPS
   ============================================ */

.field {
  margin-bottom: var(--space-4);
}

.field-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-neutral-700);
  margin-bottom: var(--space-2);
}

.field-required {
  color: var(--color-error);
  margin-left: var(--space-1);
}

.field-help {
  font-size: var(--text-xs);
  color: var(--color-neutral-500);
  margin-top: var(--space-1);
}

.field-error {
  font-size: var(--text-xs);
  color: var(--color-error);
  margin-top: var(--space-1);
}

.input.is-invalid,
.select.is-invalid,
.textarea.is-invalid {
  border-color: var(--color-error);
}

.input.is-invalid:focus,
.select.is-invalid:focus,
.textarea.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Inline form row */
.field-row {
  display: flex;
  gap: var(--space-3);
  align-items: flex-end;
}

.field-row .field {
  margin-bottom: 0;
}

/* Select styling */
.select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  padding-right: var(--space-10);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-neutral-900);
  background: var(--color-neutral-0);
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2378716c' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-3) center;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.select:hover {
  border-color: var(--color-neutral-300);
}

.select:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

/* Textarea styling */
.textarea {
  width: 100%;
  min-height: 100px;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-neutral-900);
  background: var(--color-neutral-0);
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  resize: vertical;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.textarea:hover {
  border-color: var(--color-neutral-300);
}

.textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

/* ============================================
   TABLES
   ============================================ */

.table-container {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-neutral-200);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.table th,
.table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-neutral-200);
}

.table th {
  background: var(--color-neutral-50);
  font-weight: var(--font-semibold);
  color: var(--color-neutral-700);
  white-space: nowrap;
}

.table td {
  color: var(--color-neutral-800);
}

.table tbody tr:hover {
  background: var(--color-neutral-50);
}

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

/* ============================================
   BUTTON VARIANTS (Additional) — Prompt 42 PR #24:
   no translateY hover; semantic colors stay put.
   ============================================ */

.btn-warning {
  background: var(--color-warning);
  color: white;
  border: 1px solid #C4870E;
}

.btn-warning:hover:not(:disabled) {
  background: #C4870E;
}

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

.btn.is-loading::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  top: 50%;
  left: 50%;
  margin-left: -8px;
  margin-top: -8px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

.btn-primary.is-loading::after {
  border-color: rgba(255,255,255,0.3);
  border-right-color: white;
}

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

/* ============================================
   BADGE VARIANTS (Additional)
   ============================================ */

.badge-success {
  background: var(--color-secondary-100);
  color: var(--color-secondary-700);
}

.badge-warning {
  background: var(--color-accent-100);
  color: var(--color-accent-700);
}

.badge-danger {
  background: #fee2e2;
  color: #991b1b;
}

.badge-lg {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
}

/* ============================================
   GRID / LIST LAYOUTS
   ============================================ */

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

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

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

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

/* ============================================
   ITEM CARD (Generic)
   ============================================ */

.item-card {
  background: var(--color-neutral-0);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-neutral-200);
  padding: var(--space-5);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.item-card:hover {
  /* Prompt 42 PR #24: dropped translateY bounce. */
  box-shadow: var(--shadow-card-hover);
  border-color: var(--brand-primary-soft);
}

.item-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.item-card-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-neutral-900);
  margin: 0;
}

.item-card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
  margin-top: var(--space-1);
}

.item-card-actions {
  display: flex;
  gap: var(--space-2);
}

/* ============================================
   ACTION BAR (Sticky footer)
   ============================================ */

.action-bar {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  padding: var(--space-6) 0;
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-neutral-200);
}

.action-bar-sticky {
  position: sticky;
  bottom: 0;
  background: var(--bg-primary);
  padding-bottom: var(--space-6);
}

@media (max-width: 768px) {
  .action-bar {
    flex-direction: column;
  }

  .action-bar .btn {
    width: 100%;
  }
}

/* ============================================
   QUANTITY CONTROLS
   ============================================ */

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

.quantity-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-primary-50);
  color: var(--color-primary-600);
  border: 1px solid var(--color-primary-200);
  border-radius: var(--radius-md);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.quantity-btn:hover {
  background: var(--color-primary-100);
  transform: scale(1.05);
}

.quantity-btn:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.quantity-btn:active {
  transform: scale(0.95);
}

.quantity-value {
  min-width: 60px;
  text-align: center;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-primary-600);
}

.quantity-unit {
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
}

/* ============================================
   ICON BUTTON (Delete, etc)
   ============================================ */

.btn-icon-only {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  padding: 0;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--color-neutral-400);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.btn-icon-only:hover {
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
}

.btn-icon-only.danger:hover {
  background: #fee2e2;
  color: var(--color-error);
}

.btn-icon-only:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.btn-icon-only:active {
  transform: scale(0.9);
}

/* ============================================
   LINK CARD (Navigation cards)
   ============================================ */

.link-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: var(--color-neutral-0);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.link-card:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-300);
}

.link-card-icon {
  font-size: var(--text-2xl);
}

.link-card-content {
  flex: 1;
}

.link-card-title {
  font-weight: var(--font-semibold);
  color: var(--color-neutral-800);
}

.link-card-desc {
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
}

.link-card-arrow {
  color: var(--color-neutral-400);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.link-card:hover .link-card-arrow {
  transform: translateX(4px);
  color: var(--color-primary-500);
}

.link-card:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* ============================================
   TRANSITION & ANIMATION UTILITIES
   ============================================ */

.transition-all {
  transition: var(--transition-all);
}

.transition-fast {
  transition: var(--transition-fast);
}

.transition-normal {
  transition: var(--transition-normal);
}

/* Hover lift effect */
.hover-lift {
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.hover-lift:hover {
  /* Prompt 42 PR #24: shadow change without translateY bounce. */
  box-shadow: var(--shadow-lg);
}

/* Pulse animation for attention */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Fade in animation */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-fadeIn {
  animation: fadeIn var(--transition-normal) ease forwards;
}

/* Scale in animation */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-scaleIn {
  animation: scaleIn var(--transition-normal) ease forwards;
}

/* Slide up animation */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-slideUp {
  animation: slideUp var(--transition-normal) ease forwards;
}

/* Stagger delay helpers for lists */
.stagger-1 { animation-delay: 50ms; }
.stagger-2 { animation-delay: 100ms; }
.stagger-3 { animation-delay: 150ms; }
.stagger-4 { animation-delay: 200ms; }
.stagger-5 { animation-delay: 250ms; }

/* ============================================
   VISIBILITY & DISPLAY
   ============================================ */

.invisible {
  visibility: hidden;
}

.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-100 { opacity: 1; }

/* ============================================
   CURSOR UTILITIES
   ============================================ */

.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }
.cursor-not-allowed { cursor: not-allowed; }
.cursor-grab { cursor: grab; }
.cursor-grabbing { cursor: grabbing; }

/* ============================================
   LOW STOCK INDICATORS
   ============================================ */

.low-stock {
  color: var(--color-error) !important;
}

.low-stock-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: #fee2e2;
  color: var(--color-error);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-md);
  margin-top: var(--space-2);
}

.low-stock-badge::before {
  content: "⚠";
}

/* Zero quantity - more prominent */
.quantity-zero {
  color: var(--color-error) !important;
  font-weight: var(--font-bold);
}

.quantity-zero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  background: var(--color-error);
  color: white;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-md);
  margin-top: var(--space-2);
}

/* Prompt 42 PR #24: flat status tints replace warm gradients. */
.item-card.is-low-stock {
  border-color: #F0D68A;
  background: var(--tint-warning);
}

.item-card.is-empty {
  border-color: var(--color-error);
  background: var(--tint-error);
  opacity: 0.8;
}

/* ============================================
   LOGIN MODAL
   ============================================ */

.login-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.login-modal-overlay.show {
  opacity: 1;
  visibility: visible;
}

.login-modal {
  position: relative;
  background: var(--color-neutral-0);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  padding: var(--space-8);
  max-width: 400px;
  width: calc(100% - var(--space-8));
  text-align: center;
  transform: scale(0.95) translateY(10px);
  transition: transform 0.2s ease;
}

.login-modal-overlay.show .login-modal {
  transform: scale(1) translateY(0);
}

.login-modal-close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  font-size: 24px;
  color: var(--color-neutral-400);
  cursor: pointer;
  border-radius: var(--radius-full);
  transition: background 0.15s ease, color 0.15s ease;
}

.login-modal-close:hover {
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
}

.login-modal-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-5);
  background: var(--color-primary-100);
  border-radius: var(--radius-full);
  color: var(--color-primary-600);
  font-size: 24px;
}

.login-modal-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-neutral-900);
  margin: 0 0 var(--space-3);
}

.login-modal-message {
  font-size: var(--text-base);
  color: var(--color-neutral-600);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-6);
}

.login-modal-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.login-modal-btn {
  width: 100%;
  padding: var(--space-3) var(--space-5);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-lg);
  text-decoration: none;
  text-align: center;
  transition: all 0.15s ease;
}

.login-modal-footer {
  font-size: var(--text-sm);
  color: var(--color-neutral-500);
  margin: 0;
}

/* Guest Notice Banner */
.guest-notice {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-primary-50);
  border: 1px solid var(--color-primary-200);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-5);
}

.guest-notice-icon {
  flex-shrink: 0;
  color: var(--color-primary-600);
  font-size: var(--text-lg);
}

.guest-notice-content {
  flex: 1;
}

.guest-notice-title {
  font-weight: var(--font-semibold);
  color: var(--color-primary-800);
  margin-bottom: var(--space-1);
}

.guest-notice-text {
  font-size: var(--text-sm);
  color: var(--color-primary-700);
}

.guest-notice-link {
  font-weight: var(--font-semibold);
  color: var(--color-primary-600);
  text-decoration: underline;
}

.guest-notice-link:hover {
  color: var(--color-primary-800);
}

/* Mobile adjustments */
@media (max-width: 480px) {
  .login-modal {
    padding: var(--space-6);
    margin: var(--space-4);
  }

  .login-modal-icon {
    width: 56px;
    height: 56px;
    font-size: 20px;
  }

  .login-modal-title {
    font-size: var(--text-lg);
  }

  .login-modal-message {
    font-size: var(--text-sm);
  }
}