/* Rack Builder — Dark Theme */

:root {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-rack: #0a0a0a;
  --bg-rack-cell: #1a1a1a;
  --color-front: #3b82f6;
  --color-front-light: #60a5fa;
  --color-rear: #f97316;
  --color-rear-light: #fb923c;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-border: #334155;
  --color-warning: #ef4444;
  --color-success: #22c55e;
  --color-accent: #6366f1;
  --unit-height: 28px;
  --rack-width: 260px;
  --sidebar-width: 320px;
  --radius: 6px;
}

/* Light theme overrides */
[data-theme="light"] {
  --bg-primary: #f1f5f9;
  --bg-secondary: #ffffff;
  --bg-tertiary: #e2e8f0;
  --bg-rack: #cbd5e1;
  --bg-rack-cell: #e8edf2;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #cbd5e1;
}

[data-theme="light"] .rack {
  border-color: #94a3b8;
}

[data-theme="light"] .rack-unit-number {
  border-bottom-color: #d1d5db;
}

[data-theme="light"] .rack-cell {
  border-bottom-color: #d1d5db;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--color-text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--color-border);
}

.app-header h1 {
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-header h1 .rack-icon {
  color: var(--color-accent);
}

.app-version {
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-left: 6px;
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  vertical-align: middle;
}

.header-actions {
  display: flex;
  gap: 8px;
}

/* Layout */
.app-layout {
  display: flex;
  height: calc(100vh - 53px);
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  padding: 16px;
}

.sidebar-right {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  padding: 16px;
}

.sidebar h2, .sidebar-right h2 {
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

/* Rack Container */
.rack-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  overflow-y: auto;
}

.rack-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.rack-name {
  font-size: 16px;
  font-weight: 600;
}

.rack-info {
  font-size: 13px;
  color: var(--color-text-muted);
}

.rack-stats {
  font-size: 12px;
  color: var(--color-text-muted);
  background: var(--bg-tertiary);
  padding: 2px 8px;
  border-radius: 4px;
}

/* Rack Grid */
.rack {
  display: grid;
  grid-template-columns: var(--rack-width) 40px var(--rack-width);
  background: var(--bg-rack);
  border: 3px solid #444;
  border-radius: 4px;
  position: relative;
}

.rack-column {
  position: relative;
}

.rack-column-header {
  text-align: center;
  padding: 6px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.rack-column-header.front {
  background: rgba(59, 130, 246, 0.15);
  color: var(--color-front-light);
}

.rack-column-header.rear {
  background: rgba(249, 115, 22, 0.15);
  color: var(--color-rear-light);
}

.rack-column-header.units {
  background: var(--bg-tertiary);
  color: var(--color-text-muted);
}

.rack-unit-numbers {
  display: flex;
  flex-direction: column;
}

.rack-unit-number {
  height: var(--unit-height);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 1px solid #222;
  user-select: none;
}

.rack-face {
  position: relative;
}

.rack-cell {
  height: var(--unit-height);
  border-bottom: 1px solid #222;
  position: relative;
}

.rack-cell.drag-over-valid {
  background: rgba(34, 197, 94, 0.2);
  outline: 1px dashed var(--color-success);
}

.rack-cell.drag-over-invalid {
  background: rgba(239, 68, 68, 0.15);
  outline: 1px dashed var(--color-warning);
}

/* Device blocks */
.device-block {
  position: absolute;
  left: 4px;
  right: 4px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  cursor: grab;
  user-select: none;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 8px;
  z-index: 1;
  transition: box-shadow 0.15s;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.device-block:hover {
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3);
  z-index: 2;
}

.device-block.selected {
  box-shadow: 0 0 0 2px #fff;
  z-index: 3;
}

.device-block.dragging {
  opacity: 0.5;
  cursor: grabbing;
}

/* Snap guide (drag & drop) */
.snap-guide {
  position: absolute;
  left: 4px;
  right: 4px;
  border: 2px dashed var(--color-success);
  background: rgba(34, 197, 94, 0.1);
  border-radius: 3px;
  pointer-events: none;
  z-index: 10;
  transition: top 0.1s ease, height 0.1s ease;
}

.snap-guide.invalid {
  border-color: var(--color-warning);
  background: rgba(239, 68, 68, 0.1);
}

.device-block--full-depth {
  background-image: repeating-linear-gradient(
    45deg, transparent, transparent 4px,
    rgba(255, 255, 255, 0.08) 4px, rgba(255, 255, 255, 0.08) 8px
  ) !important;
}

/* Full-depth blockade on opposite face */
.depth-blockade {
  position: absolute;
  left: 4px;
  right: 4px;
  border-radius: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: rgba(255, 255, 255, 0.35);
  pointer-events: none;
  z-index: 0;
  background: repeating-linear-gradient(
    45deg, transparent, transparent 4px,
    rgba(239, 68, 68, 0.12) 4px, rgba(239, 68, 68, 0.12) 8px
  );
  border: 1px dashed rgba(239, 68, 68, 0.3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  padding: 0 6px;
}

[data-theme="light"] .depth-blockade {
  color: rgba(0, 0, 0, 0.3);
  background: repeating-linear-gradient(
    45deg, transparent, transparent 4px,
    rgba(239, 68, 68, 0.08) 4px, rgba(239, 68, 68, 0.08) 8px
  );
  border-color: rgba(239, 68, 68, 0.25);
}

/* Reserved/selected HE units */
.rack-cell--reserved {
  position: absolute;
  left: 0;
  right: 0;
  pointer-events: none;
  z-index: 0;
  background: repeating-linear-gradient(
    -45deg, transparent, transparent 3px,
    rgba(99, 102, 241, 0.2) 3px, rgba(99, 102, 241, 0.2) 6px
  );
  border: 1px dashed rgba(99, 102, 241, 0.5);
  border-radius: 2px;
}

[data-theme="light"] .rack-cell--reserved {
  background: repeating-linear-gradient(
    -45deg, transparent, transparent 3px,
    rgba(99, 102, 241, 0.15) 3px, rgba(99, 102, 241, 0.15) 6px
  );
  border-color: rgba(99, 102, 241, 0.4);
}

/* Forms */
.form-group {
  margin-bottom: 12px;
}

.form-group label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.form-group input:not([type="radio"]):not([type="checkbox"]):not([type="color"]),
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 7px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 13px;
  font-family: inherit;
}

.form-group input:not([type="radio"]):not([type="checkbox"]):not([type="color"]):focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

.form-group textarea {
  resize: vertical;
  min-height: 60px;
}

.form-row {
  display: flex;
  gap: 8px;
}

.form-row .form-group {
  flex: 1;
}

/* Modern radio buttons */
.form-radio-group {
  display: flex;
  gap: 12px;
}

.form-radio-group label {
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--color-text);
  margin-bottom: 0;
}

.form-radio-group input[type="radio"] {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  min-width: 16px;
  min-height: 16px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  background: var(--bg-primary);
  cursor: pointer;
  position: relative;
  transition: border-color 0.15s, background 0.15s;
  flex-shrink: 0;
  margin: 0;
  padding: 0;
}

.form-radio-group input[type="radio"]:checked {
  border-color: var(--color-accent);
  background: var(--color-accent);
}

.form-radio-group input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
}

.form-radio-group input[type="radio"]:hover {
  border-color: var(--color-accent);
}

/* Modern checkboxes — iOS-style toggle switch */
.form-checkbox-label {
  display: inline-flex !important;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  cursor: pointer;
  color: var(--color-text);
}

.form-checkbox-label input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  width: 36px;
  height: 20px;
  min-width: 36px;
  min-height: 20px;
  border: none;
  border-radius: 10px;
  background: var(--color-border);
  cursor: pointer;
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
  margin: 0;
  padding: 0;
}

.form-checkbox-label input[type="checkbox"]::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  transition: transform 0.2s;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.form-checkbox-label input[type="checkbox"]:checked {
  background: var(--color-accent);
}

.form-checkbox-label input[type="checkbox"]:checked::after {
  transform: translateX(16px);
}

.form-checkbox-label input[type="checkbox"]:hover {
  background: #475569;
}

.form-checkbox-label input[type="checkbox"]:checked:hover {
  background: #4f46e5;
}

/* Modern color picker */
.form-group input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 36px;
  padding: 3px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--bg-primary);
  cursor: pointer;
  transition: border-color 0.15s;
}

.form-group input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.form-group input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: 3px;
}

.form-group input[type="color"]::-moz-color-swatch {
  border: none;
  border-radius: 3px;
}

.form-group input[type="color"]:hover {
  border-color: var(--color-accent);
}

.form-group input[type="color"]:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 14px;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, opacity 0.15s;
}

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

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: #4f46e5;
}

.btn-success {
  background: var(--color-success);
  color: #fff;
}

.btn-success:hover:not(:disabled) {
  background: #16a34a;
}

.btn-danger {
  background: var(--color-warning);
  color: #fff;
}

.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

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

.btn-secondary:hover:not(:disabled) {
  background: #475569;
}

.btn-block {
  width: 100%;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
}

/* Messages */
.message {
  padding: 8px 12px;
  border-radius: var(--radius);
  font-size: 12px;
  margin-bottom: 12px;
}

.message-error {
  background: rgba(239, 68, 68, 0.15);
  color: #fca5a5;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.message-success {
  background: rgba(34, 197, 94, 0.15);
  color: #86efac;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.message-info {
  background: rgba(59, 130, 246, 0.15);
  color: #93c5fd;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* Bulk section */
.bulk-section {
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
  margin-top: 12px;
}

.bulk-toggle-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 8px;
}

.bulk-content {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.3s ease, opacity 0.25s ease, margin-top 0.3s ease;
  margin-top: 0;
}

.bulk-content.open {
  max-height: 500px;
  opacity: 1;
  margin-top: 10px;
}

/* submit-section */
.submit-section {
  border-top: 1px solid var(--color-border);
  padding-top: 12px;
  margin-top: 12px;
}

/* Device list */
.device-list {
  margin-top: 16px;
}

.device-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px;
  background: var(--bg-primary);
  border-radius: var(--radius);
  margin-bottom: 4px;
  font-size: 12px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: border-color 0.15s;
}

.device-list-item:hover {
  border-color: var(--color-border);
}

.device-list-item.selected {
  border-color: var(--color-accent);
}

.device-list-item .device-info {
  display: flex;
  align-items: center;
  gap: 8px;
}

.device-list-item .device-color {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.device-list-item .device-pos {
  color: var(--color-text-muted);
  font-size: 11px;
}

.device-list-item .device-delete {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px;
  border-radius: 3px;
}

.device-list-item .device-delete:hover {
  color: var(--color-warning);
  background: rgba(239, 68, 68, 0.15);
}

/* Export section */
.export-section {
  margin-bottom: 16px;
}

.export-section .btn {
  margin-bottom: 6px;
}

/* Settings modal */
dialog {
  background: var(--bg-secondary);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 24px;
  max-width: 540px;
  width: 90%;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.6);
}

dialog h2 {
  margin-bottom: 16px;
  font-size: 16px;
}

dialog .dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 20px;
}

/* JSON Preview */
.json-preview {
  background: var(--bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 10px;
  font-size: 11px;
  font-family: 'SF Mono', 'Consolas', 'Monaco', monospace;
  max-height: 300px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--color-text);
  margin-top: 8px;
}

/* Storage indicator */
.storage-indicator {
  margin-top: 20px;
  padding-top: 12px;
  border-top: 1px solid var(--color-border);
}

.storage-label {
  font-size: 11px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.storage-bar {
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  margin-bottom: 8px;
  overflow: hidden;
}

.storage-bar-fill {
  height: 100%;
  background: var(--color-success);
  border-radius: 2px;
  transition: width 0.3s;
  width: 0;
}

.storage-bar-fill.warning {
  background: #f59e0b;
}

.storage-bar-fill.critical {
  background: var(--color-warning);
}

/* Rack Tabs (Multi-Rack) */
#rack-tabs {
  display: none;
  gap: 6px;
  margin-bottom: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.rack-tab {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 8px 16px;
  background: var(--bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  font-family: inherit;
  color: var(--color-text);
}

.rack-tab:hover {
  background: #475569;
}

.rack-tab.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.rack-tab-name {
  font-size: 13px;
  font-weight: 600;
}

.rack-tab-info {
  font-size: 11px;
  opacity: 0.7;
}

/* Multi-rack settings rows */
.rack-config-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.rack-row-num {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  min-width: 24px;
  text-align: right;
}

.rack-config-row input[type="text"] {
  flex: 1;
  padding: 7px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 13px;
  font-family: inherit;
}

.rack-config-row input[type="number"] {
  width: 70px;
  padding: 7px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 13px;
  font-family: inherit;
}

.rack-config-row input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

.rack-row-label {
  font-size: 12px;
  color: var(--color-text-muted);
}

.rack-row-direction {
  padding: 7px 6px;
  background: var(--bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
}

.rack-row-direction:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.25);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--bg-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #475569;
}

/* Responsive */
@media (max-width: 1100px) {
  .sidebar-right {
    display: none;
  }
}

@media (max-width: 800px) {
  .app-layout {
    flex-direction: column;
    height: auto;
  }

  .sidebar {
    width: 100%;
    min-width: auto;
    border-right: none;
    border-bottom: 1px solid var(--color-border);
  }

  .rack-container {
    min-height: 60vh;
  }
}