/**
 * Layout Components CSS
 * Styles for TabContainer, ProgressStepper, SplitPane, TreeView, and FileUpload components
 */

/* =============================================================================
   TAB CONTAINER STYLES
   ============================================================================= */

.tab-container {
  display: flex;
  flex-direction: column;
  border: 1px solid #dee2e6;
  border-radius: 4px;
  background-color: #ffffff;
  font-family: Arial, sans-serif;
}

.tab-container__header {
  display: flex;
  background-color: #f8f9fa;
  border-bottom: 1px solid #dee2e6;
  overflow-x: auto;
  min-height: 40px;
}

.tab-container__tab {
  display: flex;
  align-items: center;
  padding: 8px 16px;
  border: none;
  background-color: transparent;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  font-size: 12px;
  color: #333333;
  white-space: nowrap;
  min-width: 0;
  flex-shrink: 0;
  position: relative;
  transition: all 0.2s ease;
}

.tab-container__tab:hover {
  background-color: #e9ecef;
}

.tab-container__tab--active {
  background-color: #ffffff;
  border-bottom-color: #007bff;
  font-weight: bold;
  color: #007bff;
}

.tab-container__tab--disabled {
  color: #999999;
  cursor: not-allowed;
  opacity: 0.6;
}

.tab-container__tab--disabled:hover {
  background-color: transparent;
}

.tab-container__tab-icon {
  margin-right: 6px;
  font-size: 14px;
}

.tab-container__tab-title {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab-container__tab-badge {
  margin-left: 6px;
  background-color: #dc3545;
  color: #ffffff;
  border-radius: 50%;
  font-size: 10px;
  font-weight: bold;
  min-width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tab-container__tab-close {
  margin-left: 8px;
  font-size: 14px;
  color: #666666;
  cursor: pointer;
  padding: 2px;
  border-radius: 2px;
  transition:
    color 0.2s ease,
    background-color 0.2s ease;
}

.tab-container__tab-close:hover {
  color: #dc3545;
  background-color: #f8f9fa;
}

.tab-container__content {
  flex: 1;
  padding: 16px;
  background-color: #ffffff;
  overflow: auto;
}

/* =============================================================================
   PROGRESS STEPPER STYLES
   ============================================================================= */

.progress-stepper {
  display: flex;
  align-items: center;
  font-family: Arial, sans-serif;
  padding: 16px 0;
}

.progress-stepper--vertical {
  flex-direction: column;
  align-items: flex-start;
}

.progress-stepper__step {
  display: flex;
  align-items: center;
  position: relative;
  flex: 1;
  min-width: 0;
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.progress-stepper__step:hover:not(.progress-stepper__step--disabled) {
  opacity: 0.8;
}

.progress-stepper__step--disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.progress-stepper--vertical .progress-stepper__step {
  flex-direction: column;
  align-items: flex-start;
  width: 100%;
  padding: 12px 0;
}

.progress-stepper__circle {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: bold;
  position: relative;
  z-index: 10;
  transition: all 0.3s ease;
}

.progress-stepper__circle--completed {
  background-color: #28a745;
  color: #ffffff;
  border: 2px solid #28a745;
}

.progress-stepper__circle--active {
  background-color: #007bff;
  color: #ffffff;
  border: 2px solid #007bff;
}

.progress-stepper__circle--inactive {
  background-color: #e9ecef;
  color: #666666;
  border: 2px solid #e9ecef;
}

.progress-stepper__circle--disabled {
  background-color: #f8f9fa;
  color: #999999;
  border: 2px solid #e9ecef;
  opacity: 0.6;
}

.progress-stepper__line {
  flex: 1;
  height: 2px;
  background-color: #e9ecef;
  position: relative;
  z-index: 5;
}

.progress-stepper--vertical .progress-stepper__line {
  width: 2px;
  height: 40px;
  margin-left: 14px;
}

.progress-stepper__line--completed {
  background-color: #28a745;
}

.progress-stepper__content {
  margin-left: 12px;
  display: flex;
  flex-direction: column;
}

.progress-stepper--vertical .progress-stepper__content {
  margin-left: 12px;
  margin-top: -20px;
}
.progress-stepper__title {
  font-size: 11px;
  font-weight: bold;
  color: #333333;
  margin-bottom: 2px;
}

.progress-stepper__description {
  font-size: 10px;
  color: #666666;
  line-height: 1.3;
}

.progress-stepper__step--active .progress-stepper__title {
  color: #007bff;
}

/* =============================================================================
   SPLIT PANE STYLES
   ============================================================================= */

.split-pane {
  display: flex;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.split-pane--vertical {
  flex-direction: column;
}

.split-pane__pane {
  overflow: auto;
  background-color: #ffffff;
  border: 1px solid #e9ecef;
}

.split-pane__pane--left,
.split-pane__pane--top {
  border-right: none;
  border-bottom: none;
}

.split-pane__pane--right,
.split-pane__pane--bottom {
  border-left: none;
  border-top: none;
}

.split-pane__splitter {
  background-color: #e9ecef;
  cursor: col-resize;
  user-select: none;
  position: relative;
  transition: background-color 0.2s ease;
}

.split-pane--vertical .split-pane__splitter {
  cursor: row-resize;
}

.split-pane__splitter:hover {
  background-color: #dee2e6;
}

.split-pane__splitter--resizing {
  background-color: #007bff;
}

.split-pane__splitter-grip {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.split-pane__splitter-grip::before {
  content: '';
  width: 2px;
  height: 16px;
  background-color: #999999;
  box-shadow:
    4px 0 0 #999999,
    -4px 0 0 #999999;
}

.split-pane--vertical .split-pane__splitter-grip::before {
  width: 16px;
  height: 2px;
  box-shadow:
    0 4px 0 #999999,
    0 -4px 0 #999999;
}

/* =============================================================================
   TREE VIEW STYLES
   ============================================================================= */

.tree-view {
  background-color: #ffffff;
  border: 1px solid #e9ecef;
  border-radius: 4px;
  font-family: Arial, sans-serif;
  font-size: 13px;
  overflow: auto;
  position: relative;
}

.tree-view__node {
  display: flex;
  align-items: center;
  padding: 4px 8px;
  cursor: pointer;
  user-select: none;
  position: relative;
  white-space: nowrap;
  transition: background-color 0.2s ease;
}

.tree-view__node:hover {
  background-color: #f5f5f5;
}

.tree-view__node--selected {
  background-color: #e3f2fd;
  color: #007bff;
}

.tree-view__node--disabled {
  color: #999999;
  cursor: not-allowed;
  opacity: 0.6;
}

.tree-view__node--disabled:hover {
  background-color: transparent;
}

.tree-view__expand-icon {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 4px;
  font-size: 10px;
  color: #666666;
  cursor: pointer;
  transition: transform 0.2s ease;
}

.tree-view__expand-icon--expanded {
  transform: rotate(90deg);
}

.tree-view__icon {
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 6px;
  font-size: 14px;
  color: #666666;
}

.tree-view__checkbox {
  width: 14px;
  height: 14px;
  border: 1px solid #999999;
  border-radius: 2px;
  margin-right: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  transition: all 0.2s ease;
}

.tree-view__checkbox--checked {
  background-color: #007bff;
  border-color: #007bff;
  color: #ffffff;
}

.tree-view__label {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tree-view__scrollbar {
  position: absolute;
  right: 0;
  top: 0;
  width: 8px;
  height: 100%;
  background-color: #f0f0f0;
}

.tree-view__scrollbar-thumb {
  background-color: #c0c0c0;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.tree-view__scrollbar-thumb:hover {
  background-color: #a0a0a0;
}

/* =============================================================================
   FILE UPLOAD STYLES
   ============================================================================= */

.file-upload {
  border: 2px dashed #dee2e6;
  border-radius: 8px;
  padding: 32px;
  text-align: center;
  background-color: #f8f9fa;
  font-family: Arial, sans-serif;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.file-upload:hover {
  border-color: #007bff;
  background-color: #f0f8ff;
}

.file-upload--drag-over {
  border-color: #007bff;
  border-style: solid;
  background-color: #e3f2fd;
  transform: scale(1.02);
}

.file-upload--disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background-color: #f8f9fa;
}

.file-upload--disabled:hover {
  border-color: #dee2e6;
  background-color: #f8f9fa;
  transform: none;
}

.file-upload__icon {
  font-size: 48px;
  color: #6c757d;
  margin-bottom: 16px;
  display: block;
}

.file-upload__text {
  font-size: 14px;
  color: #333333;
  margin-bottom: 16px;
  line-height: 1.4;
}

.file-upload__button {
  background-color: #007bff;
  color: #ffffff;
  border: none;
  border-radius: 4px;
  padding: 8px 16px;
  font-size: 12px;
  cursor: pointer;
  transition: background-color 0.2s ease;
}

.file-upload__button:hover {
  background-color: #0056b3;
}

.file-upload__file-list {
  margin-top: 16px;
  text-align: left;
  max-height: 150px;
  overflow-y: auto;
}

.file-upload__file-item {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  background-color: #ffffff;
  border: 1px solid #e9ecef;
  border-radius: 4px;
  margin-bottom: 4px;
  font-size: 12px;
}

.file-upload__file-item--error {
  border-color: #dc3545;
  background-color: #ffeaea;
}

.file-upload__file-icon {
  margin-right: 8px;
  color: #666666;
}

.file-upload__file-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-upload__file-size {
  color: #666666;
  margin-left: 8px;
  margin-right: 8px;
}

.file-upload__file-remove {
  color: #dc3545;
  cursor: pointer;
  font-weight: bold;
  padding: 2px 6px;
  border-radius: 2px;
  transition: background-color 0.2s ease;
}

.file-upload__file-remove:hover {
  background-color: #f8d7da;
}

.file-upload__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background-color: #e9ecef;
}

.file-upload__progress-bar {
  height: 100%;
  background-color: #007bff;
  transition: width 0.3s ease;
}

.file-upload__progress-text {
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: #333333;
  background-color: rgba(255, 255, 255, 0.9);
  padding: 2px 8px;
  border-radius: 4px;
}

/* =============================================================================
   ERROR STATES AND VISUAL FEEDBACK
   ============================================================================= */

.tab-container--error {
  border-color: #dc3545;
}

.tab-container__tab--error {
  border-bottom-color: #dc3545;
  color: #dc3545;
}

.progress-stepper__step--error .progress-stepper__circle {
  background-color: #dc3545;
  border-color: #dc3545;
  color: #ffffff;
}

.tree-view--error {
  border-color: #dc3545;
}

.file-upload--error {
  border-color: #dc3545;
  background-color: #ffeaea;
}

/* Loading states */
.tab-container--loading {
  opacity: 0.7;
  pointer-events: none;
}

.progress-stepper--loading .progress-stepper__circle {
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

/* Improved disabled states */
.tab-container__tab--disabled,
.progress-stepper__step--disabled,
.tree-view__node--disabled,
.file-upload--disabled {
  filter: grayscale(100%);
}

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

@media (max-width: 768px) {
  .tab-container__tab {
    padding: 6px 12px;
    font-size: 11px;
  }

  .progress-stepper__circle {
    width: 24px;
    height: 24px;
    font-size: 10px;
  }

  .split-pane__splitter {
    min-width: 8px;
    min-height: 8px;
  }

  .tree-view__node {
    padding: 6px;
  }

  .file-upload {
    padding: 20px;
  }

  .file-upload__icon {
    font-size: 36px;
  }
}

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

.tab-container__tab:focus,
.progress-stepper__step:focus,
.tree-view__node:focus,
.file-upload:focus,
.file-upload__button:focus,
.tree-view__expand-icon:focus {
  outline: 2px solid #007bff;
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  .tab-container__tab,
  .progress-stepper__circle,
  .progress-stepper__line,
  .split-pane__splitter,
  .tree-view__node,
  .tree-view__expand-icon,
  .file-upload,
  .file-upload__progress-bar,
  .file-upload__button,
  .tab-container__tab-close,
  .tree-view__checkbox {
    transition: none;
    animation: none;
  }

  .file-upload--drag-over {
    transform: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .tab-container,
  .split-pane__pane,
  .tree-view,
  .file-upload {
    border-width: 2px;
  }

  .tab-container__tab--active {
    border-bottom-width: 4px;
  }

  .progress-stepper__circle {
    border-width: 3px;
  }

  .progress-stepper__line {
    height: 3px;
  }

  .tree-view__checkbox {
    border-width: 2px;
  }

  .file-upload {
    border-width: 3px;
  }

  /* Enhanced contrast colors */
  .tab-container__tab--active {
    color: #0056b3;
    border-bottom-color: #0056b3;
  }

  .progress-stepper__circle--active {
    background-color: #0056b3;
    border-color: #0056b3;
  }

  .tree-view__node--selected {
    background-color: #0056b3;
    color: #ffffff;
  }
}