/* ==============================
   Buttons
   ============================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  min-height: 48px;
  line-height: 1;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Primary */
.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

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

/* Secondary */
.btn-secondary {
  background: var(--color-white);
  color: var(--color-gray-700);
  border: 1.5px solid var(--color-gray-300);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-50);
  border-color: var(--color-gray-400);
}

/* Large action buttons (welcome screen) */
.btn-large {
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-10) var(--space-12);
  border-radius: var(--radius-2xl);
  font-size: var(--font-size-3xl);
  min-width: 240px;
  min-height: 200px;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

.btn-large:hover:not(:disabled) {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

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

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

.btn-large .btn-label {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

.btn-large .btn-desc {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  opacity: 0.85;
}

.btn-large-wide {
  padding: var(--space-5) var(--space-10);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-xl);
  min-width: 280px;
}

/* Receive (green) */
.btn-receive {
  background: linear-gradient(135deg, #059669, #10B981);
  color: var(--color-white);
}

.btn-receive:hover:not(:disabled) {
  background: linear-gradient(135deg, #047857, #059669);
}

/* Ship (red/orange) */
.btn-ship {
  background: linear-gradient(135deg, #DC2626, #EF4444);
  color: var(--color-white);
}

.btn-ship:hover:not(:disabled) {
  background: linear-gradient(135deg, #B91C1C, #DC2626);
}

/* Capture button (camera screen) */
.btn-capture {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  padding: 0;
  cursor: pointer;
  touch-action: manipulation;
}

.capture-ring {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  border: 4px solid var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.capture-inner {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  transition: all var(--transition-fast);
}

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

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

.btn-capture:active .capture-inner {
  transform: scale(0.85);
  background: var(--color-primary-hover);
}

/* Quantity +/- buttons */
.btn-qty {
  width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-md);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-minus {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  border: 1.5px solid var(--color-gray-300);
}

.btn-minus:hover:not(:disabled) {
  background: var(--color-gray-200);
}

.btn-plus {
  background: var(--color-primary-light);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

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

/* Delete button */
.btn-delete {
  padding: var(--space-2) var(--space-4);
  background: var(--color-danger-light);
  color: var(--color-danger);
  border: 1px solid var(--color-danger);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  font-family: var(--font-family);
  transition: all var(--transition-fast);
  min-height: 36px;
}

.btn-delete:hover {
  background: var(--color-danger);
  color: var(--color-white);
}

/* ==============================
   Screen Header
   ============================== */

.screen-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-6);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  min-height: var(--header-height);
  flex-shrink: 0;
}

.screen-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-800);
}

/* Mode badge */
.mode-badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.02em;
}

.mode-badge.mode-receive {
  background: var(--color-success-light);
  color: var(--color-success);
}

.mode-badge.mode-ship {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

/* Pending indicator */
.pending-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
  padding: var(--space-1) var(--space-3);
  background: var(--color-info-light);
  color: var(--color-info);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* ==============================
   Screen Footer
   ============================== */

.screen-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  background: var(--color-white);
  border-top: 1px solid var(--color-gray-200);
  min-height: var(--footer-height);
  flex-shrink: 0;
}

/* ==============================
   Capture Flash
   ============================== */

.capture-flash {
  position: absolute;
  inset: 0;
  background: white;
  opacity: 0;
  pointer-events: none;
  z-index: 20;
  border-radius: var(--radius-xl);
}

.capture-flash.active {
  animation: flash 0.3s ease-out;
}

@keyframes flash {
  0% { opacity: 0.7; }
  100% { opacity: 0; }
}

/* ==============================
   Dialog
   ============================== */

.dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 1;
  transition: opacity var(--transition-normal);
}

.dialog-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.dialog-card {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  padding: var(--space-8);
  max-width: 480px;
  width: calc(100% - var(--space-8));
  box-shadow: var(--shadow-xl);
  transform: scale(1);
  transition: transform var(--transition-normal);
}

.dialog-overlay.hidden .dialog-card {
  transform: scale(0.95);
}

.dialog-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  color: var(--color-primary);
}

.dialog-header h3 {
  font-size: var(--font-size-xl);
  color: var(--color-gray-900);
}

.dialog-message {
  font-size: var(--font-size-lg);
  color: var(--color-gray-700);
  margin-bottom: var(--space-6);
}

.dialog-summary {
  background: var(--color-gray-50);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
  max-height: 200px;
  overflow-y: auto;
}

.dialog-summary-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-2) 0;
  font-size: var(--font-size-sm);
}

.dialog-summary-item + .dialog-summary-item {
  border-top: 1px solid var(--color-gray-200);
}

.dialog-summary-name {
  color: var(--color-gray-700);
  font-weight: var(--font-weight-medium);
}

.dialog-summary-qty {
  color: var(--color-gray-900);
  font-weight: var(--font-weight-semibold);
}

.dialog-buttons {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
}

.dialog-buttons .btn {
  min-width: 100px;
}

/* Spinner */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

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

/* ==============================
   Toast Notifications
   ============================== */

.toast-container {
  position: fixed;
  top: var(--space-4);
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
  width: calc(100% - var(--space-8));
  max-width: 480px;
}

.toast {
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  transform: translateY(-12px);
  transition: all var(--transition-normal);
  pointer-events: auto;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

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

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

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

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

/* ==============================
   Quantity Controls
   ============================== */

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

.qty-input {
  width: 72px;
  height: 44px;
  text-align: center;
  border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  background: var(--color-white);
  outline: none;
  transition: border-color var(--transition-fast);
  -moz-appearance: textfield;
}

.qty-input::-webkit-outer-spin-button,
.qty-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.qty-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* ==============================
   Part Items (quantity screen)
   ============================== */

.part-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-fast);
}

.part-item + .part-item {
  margin-top: var(--space-3);
}

.part-item:hover {
  border-color: var(--color-gray-300);
  box-shadow: var(--shadow-xs);
}

.part-info {
  flex: 1;
  min-width: 0;
  cursor: pointer;
}

.part-name {
  display: block;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-800);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.part-id {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
  margin-top: var(--space-1);
}

/* ==============================
   Scanned parts (camera screen)
   ============================== */

.scanned-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-3);
  background: var(--color-white);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-200);
  font-size: var(--font-size-sm);
}

.scanned-item + .scanned-item {
  margin-top: var(--space-2);
}

.scanned-item-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--color-success-light);
  color: var(--color-success);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.scanned-item-name {
  flex: 1;
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.scanned-item-id {
  font-size: var(--font-size-xs);
  color: var(--color-gray-400);
}

/* ==============================
   Empty message
   ============================== */

.empty-message {
  text-align: center;
  color: var(--color-gray-400);
  font-size: var(--font-size-sm);
  padding: var(--space-6) var(--space-4);
}