/* Modern High-End Studio Theme for E-Paper Visual Layout Editor */

:root {
  --bg-dark: #0f172a;
  --bg-surface: #1e293b;
  --bg-surface-border: #334155;
  --bg-panel: #182234;
  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-secondary: #06b6d4;
  --accent-success: #10b981;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --epaper-black: #000000;
  --epaper-red: #e63946;
  --epaper-white: #ffffff;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-main: 0 10px 25px -5px rgba(0, 0, 0, 0.4);
}

@font-face {
  font-family: 'Meteocons';
  src: url('https://cdn.jsdelivr.net/gh/alessioatzeni/meteocons-sass@master/font/meteocons-webfont.woff') format('woff');
  font-weight: normal;
  font-style: normal;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-main);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* Header Navbar */
.app-header {
  height: 60px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--bg-surface-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.15rem;
  color: #ffffff;
}

.brand-icon {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  color: #fff;
  font-size: 1.2rem;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.form-select, .form-input {
  background-color: var(--bg-dark);
  border: 1px solid var(--bg-surface-border);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  outline: none;
  transition: all 0.2s;
}

.form-select:focus, .form-input:focus {
  border-color: var(--accent-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn {
  background-color: var(--bg-surface-border);
  color: var(--text-main);
  border: none;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.btn:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), #4f46e5);
  color: #ffffff;
}

.btn-success {
  background: linear-gradient(135deg, var(--accent-success), #059669);
  color: #ffffff;
}

.btn-secondary {
  background-color: var(--bg-dark);
  border: 1px solid var(--bg-surface-border);
}

/* App Main Layout Grid */
.app-container {
  flex: 1;
  display: grid;
  grid-template-columns: 280px 1fr 340px;
  height: calc(100vh - 60px);
  overflow: hidden;
}

/* Left Sidebar - Tool Palette & Layers */
.left-sidebar {
  background-color: var(--bg-surface);
  border-right: 1px solid var(--bg-surface-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.section-title {
  padding: 14px 16px 8px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  padding: 12px 16px;
}

.tool-btn {
  background-color: var(--bg-panel);
  border: 1px solid var(--bg-surface-border);
  color: var(--text-main);
  padding: 12px 8px;
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.2s;
}

.tool-btn:hover {
  background-color: var(--bg-surface-border);
  border-color: var(--accent-primary);
  color: #fff;
}

.tool-btn .material-symbols-outlined {
  font-size: 1.4rem;
  color: var(--accent-secondary);
}

/* Layer Tree List */
.layers-list {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.layer-item {
  background-color: var(--bg-panel);
  border: 1px solid var(--bg-surface-border);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  cursor: pointer;
  user-select: none;
  transition: all 0.2s;
}

.layer-item.active {
  border-color: var(--accent-primary);
  background-color: rgba(99, 102, 241, 0.15);
}

.layer-info {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.layer-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  opacity: 0.7;
}

.layer-actions:hover {
  opacity: 1;
}

.icon-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  border-radius: 4px;
  display: flex;
  align-items: center;
}

.icon-btn:hover {
  color: #fff;
  background-color: rgba(255, 255, 255, 0.1);
}

/* Center Canvas Viewport */
.canvas-viewport {
  position: relative;
  background-color: var(--bg-dark);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.viewport-toolbar {
  height: 44px;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--bg-surface-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 5;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  cursor: crosshair;
}

#editorCanvas {
  position: absolute;
  top: 0;
  left: 0;
}

/* Right Sidebar - Properties Inspector & Code Output */
.right-sidebar {
  background-color: var(--bg-surface);
  border-left: 1px solid var(--bg-surface-border);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.tab-header {
  display: flex;
  border-bottom: 1px solid var(--bg-surface-border);
}

.tab-btn {
  flex: 1;
  padding: 12px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all 0.2s;
}

.tab-btn.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
  background-color: rgba(99, 102, 241, 0.08);
}

.tab-content {
  padding: 16px;
  display: none;
  flex-direction: column;
  gap: 16px;
}

.tab-content.active {
  display: flex;
}

.property-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.property-group label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.row-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

/* Color Picker Radio Group */
.color-picker {
  display: flex;
  gap: 10px;
}

.color-option {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--bg-surface-border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.15s;
}

.color-option.selected {
  transform: scale(1.2);
  border-color: var(--accent-primary);
}

.color-option.black { background-color: #000; }
.color-option.red { background-color: #e63946; }
.color-option.white { background-color: #fff; }

/* Code Output Drawer */
.code-view {
  background-color: #090d16;
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-family: 'Fira Code', monospace;
  font-size: 0.78rem;
  color: #e2e8f0;
  max-height: 420px;
  overflow: auto;
  white-space: pre;
  line-height: 1.4;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.75);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal-backdrop.active {
  display: flex;
}

.modal-dialog {
  background-color: var(--bg-surface);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-lg);
  width: 680px;
  max-width: 90vw;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--shadow-main);
}

.modal-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--bg-surface-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
}

.icon-search-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.icon-card {
  background-color: var(--bg-panel);
  border: 1px solid var(--bg-surface-border);
  border-radius: var(--radius-sm);
  padding: 12px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.icon-card:hover {
  background-color: var(--accent-primary);
  color: #fff;
}

.icon-card .material-symbols-outlined {
  font-size: 2rem;
}