/**
 * Components CSS - Reusable UI component styles
 * Mobile-first with touch-friendly sizing
 */

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: var(--button-height);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-card);
  color: var(--color-text);
  transition: all var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

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

.btn:active {
  transform: translateY(1px);
}

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

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

/* Primary Button */
.btn-primary {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

/* Success Button */
.btn-success {
  background-color: var(--color-success);
  border-color: var(--color-success);
  color: white;
}

.btn-success:hover {
  background-color: #256029;
  border-color: #256029;
}

/* Danger Button */
.btn-danger {
  background-color: var(--color-danger);
  border-color: var(--color-danger);
  color: white;
}

.btn-danger:hover {
  background-color: #b71c1c;
  border-color: #b71c1c;
}

/* Ghost Button (transparent) */
.btn-ghost {
  background-color: transparent;
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: var(--color-bg-secondary);
}

/* Outline Button */
.btn-outline {
  background-color: transparent;
}

.btn-outline-primary {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-outline-primary:hover {
  background-color: var(--color-primary-light);
}

/* Button Sizes */
.btn-sm {
  min-height: 36px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
}

.btn-lg {
  min-height: 56px;
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

/* Full Width Button */
.btn-block {
  display: flex;
  width: 100%;
}

/* Icon Only Button */
.btn-icon {
  padding: var(--space-3);
  min-width: var(--button-height);
}

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

.btn-loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

.btn-primary.btn-loading::after,
.btn-success.btn-loading::after,
.btn-danger.btn-loading::after {
  border-color: rgba(255, 255, 255, 0.3);
  border-top-color: white;
}

/* ==================== INPUTS ==================== */

.input {
  width: 100%;
  min-height: var(--input-height);
  padding: var(--space-3) var(--space-4);
  font-size: 16px; /* Prevents zoom on iOS */
  line-height: 1.5;
  color: var(--color-text);
  background-color: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  -webkit-appearance: none;
  appearance: none;
}

.input::placeholder {
  color: var(--color-muted);
  opacity: 1;
}

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

.input:disabled {
  background-color: var(--color-bg-secondary);
  cursor: not-allowed;
  opacity: 0.7;
}

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

.input-icon {
  position: absolute;
  left: var(--space-4);
  color: var(--color-muted);
  pointer-events: none;
}

.input-wrapper .input {
  padding-left: calc(var(--space-4) + 24px);
}

/* Input Sizes */
.input-sm {
  min-height: 40px;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
}

.input-lg {
  min-height: 56px;
  padding: var(--space-4);
  font-size: var(--font-size-lg);
}

/* Monospace input for UPC/numbers */
.input-mono {
  font-family: var(--font-family-mono);
  letter-spacing: 0.05em;
}

/* Input States */
.input-error {
  border-color: var(--color-danger);
}

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

.input-success {
  border-color: var(--color-success);
}

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

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

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

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
}

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

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

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

.card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

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

.card-header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
}

.card-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
}

.card-title {
  margin: 0;
  font-size: var(--font-size-lg);
  font-weight: 600;
}

/* Clickable Card */
.card-clickable {
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.card-clickable:active {
  transform: translateY(0);
}

/* Compact Card (for lists) */
.card-compact .card-body {
  padding: var(--space-3);
}

/* ==================== BADGES ==================== */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

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

.badge-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

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

.badge-danger {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
}

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

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

/* Source Badges (API/Manual) */
.badge-api {
  background-color: var(--color-info-bg);
  color: var(--color-info);
  border: 1px solid var(--color-info-border);
}

.badge-manual {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
  border: 1px solid var(--color-warning-border);
}

/* ==================== ALERTS ==================== */

.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid;
}

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

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

.alert-title {
  font-weight: 600;
  margin-bottom: var(--space-1);
}

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

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

.alert-danger {
  background-color: var(--color-danger-bg);
  border-color: var(--color-danger-border);
  color: var(--color-danger);
}

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

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

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

.progress-bar {
  height: 100%;
  background-color: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width var(--transition-normal);
}

.progress-bar-success {
  background-color: var(--color-success);
}

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

.progress-bar-danger {
  background-color: var(--color-danger);
}

/* Animated progress */
.progress-bar-animated {
  background-image: linear-gradient(
    45deg,
    rgba(255, 255, 255, 0.15) 25%,
    transparent 25%,
    transparent 50%,
    rgba(255, 255, 255, 0.15) 50%,
    rgba(255, 255, 255, 0.15) 75%,
    transparent 75%,
    transparent
  );
  background-size: 1rem 1rem;
  animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
  from {
    background-position: 1rem 0;
  }
  to {
    background-position: 0 0;
  }
}

/* ==================== DIVIDER ==================== */

.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--space-4) 0;
}

.divider-vertical {
  width: 1px;
  height: auto;
  min-height: 20px;
  background-color: var(--color-border);
  margin: 0 var(--space-3);
}

/* ==================== LISTS ==================== */

.list {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.list-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border-light);
  transition: background-color var(--transition-fast);
}

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

.list-item-clickable {
  cursor: pointer;
}

.list-item-clickable:hover {
  background-color: var(--color-bg-secondary);
}

.list-item-clickable:active {
  background-color: var(--color-border-light);
}

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

.list-item-title {
  font-weight: 500;
  margin-bottom: var(--space-1);
}

.list-item-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.list-item-action {
  flex-shrink: 0;
}

/* ==================== EMPTY STATE ==================== */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-4);
  text-align: center;
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

.empty-state-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.empty-state-description {
  color: var(--color-muted);
  margin-bottom: var(--space-4);
  max-width: 300px;
}

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

.stat-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-4);
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.stat-change {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-top: var(--space-2);
}

.stat-change-positive {
  color: var(--color-success);
}

.stat-change-negative {
  color: var(--color-danger);
}

/* ==================== DROPDOWN/SELECT ==================== */

.select {
  width: 100%;
  min-height: var(--input-height);
  padding: var(--space-3) var(--space-4);
  padding-right: calc(var(--space-4) + 20px);
  font-size: 16px;
  color: var(--color-text);
  background-color: white;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236c757d' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--space-3) center;
  background-repeat: no-repeat;
  background-size: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
}

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

/* ==================== TOGGLE/SWITCH ==================== */

.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

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

.toggle-track {
  width: 48px;
  height: 28px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast);
}

.toggle-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 24px;
  height: 24px;
  background-color: white;
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.toggle-input:checked + .toggle-track {
  background-color: var(--color-primary);
}

.toggle-input:checked + .toggle-track + .toggle-thumb {
  transform: translateX(20px);
}

.toggle-input:focus-visible + .toggle-track {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.toggle-label {
  margin-left: var(--space-3);
  font-size: var(--font-size-base);
}

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

.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

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

.modal {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 90vh;
  background-color: var(--color-card);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  z-index: var(--z-modal);
  transform: translateY(100%);
  transition: transform var(--transition-normal);
  overflow: hidden;
}

.modal.active {
  transform: translateY(0);
}

/* Desktop modal - centered */
@media (min-width: 768px) {
  .modal {
    top: 50%;
    left: 50%;
    bottom: auto;
    right: auto;
    width: 90%;
    max-width: 500px;
    max-height: 85vh;
    border-radius: var(--radius-lg);
    transform: translate(-50%, -50%) scale(0.95);
    opacity: 0;
  }

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

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--color-muted);
  transition: background-color var(--transition-fast);
}

.modal-close:hover {
  background-color: var(--color-bg-secondary);
}

.modal-body {
  padding: var(--space-4);
  overflow-y: auto;
  max-height: calc(90vh - 120px);
}

.modal-footer {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* Mobile: handle bar for swipe-to-close hint */
.modal-handle {
  display: block;
  width: 36px;
  height: 4px;
  background-color: var(--color-border);
  border-radius: var(--radius-full);
  margin: var(--space-2) auto;
}

@media (min-width: 768px) {
  .modal-handle {
    display: none;
  }
}

/* ==================== TOAST/NOTIFICATION ==================== */

.toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

/* Mobile: bottom of screen, above nav */
@media (max-width: 767px) {
  .toast-container {
    top: auto;
    bottom: calc(var(--nav-height) + var(--space-4));
    left: var(--space-4);
  }
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background-color: var(--color-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: slideInRight var(--transition-normal) ease-out;
}

.toast-success {
  border-left: 4px solid var(--color-success);
}

.toast-error {
  border-left: 4px solid var(--color-danger);
}

.toast-warning {
  border-left: 4px solid var(--color-warning);
}

.toast-info {
  border-left: 4px solid var(--color-info);
}

/* ==================== SPINNER ==================== */

.spinner {
  display: inline-block;
  width: 24px;
  height: 24px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

.spinner-sm {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.spinner-lg {
  width: 40px;
  height: 40px;
  border-width: 3px;
}

/* ==================== PILL NAVIGATION (Tabs) ==================== */

.tab-list {
  display: flex;
  gap: var(--space-2);
  padding: var(--space-2);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-item {
  flex-shrink: 0;
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab-item:hover {
  color: var(--color-text);
  background-color: var(--color-card);
}

.tab-item.active {
  color: var(--color-text);
  background-color: var(--color-card);
  box-shadow: var(--shadow-sm);
}

/* ==================== PRODUCT IMAGE ==================== */

.product-image-container {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  aspect-ratio: 1;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.product-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.product-image-sm {
  width: 48px;
  height: 48px;
}

.product-image-md {
  width: 80px;
  height: 80px;
}

.product-image-lg {
  width: 120px;
  height: 120px;
}

/* ==================== PRICE DISPLAY ==================== */

.price-display {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.price-display-lg {
  font-size: var(--font-size-3xl);
}

.price-currency {
  font-size: 0.6em;
  vertical-align: super;
  margin-right: 2px;
}

/* ==================== LOG/CONSOLE DISPLAY ==================== */

.log-container {
  max-height: 200px;
  overflow-y: auto;
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
}

.log-entry {
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border-light);
}

.log-entry:last-child {
  border-bottom: none;
}

.log-entry-error {
  color: var(--color-danger);
  background-color: var(--color-danger-bg);
}

.log-timestamp {
  color: var(--color-muted);
  margin-right: var(--space-2);
}