:root {
  --primary: #6750a4;
  --on-primary: #ffffff;
  --surface: #141218;
  --surface-variant: #49454f;
  --on-surface: #e6e1e5;
  --on-surface-variant: #cac4d0;
  --outline: #938f99;
  --primary-container: #4f378b;
  --on-primary-container: #eaddff;
  --radius-md: 10px;
  --radius-lg: 16px;
  --anim-speed: 0.25s;
  --header-height: 64px;

  --sidebar-width: 240px;
  --sidebar-collapsed-width: 68px;
  --font-mono: 'Fira Code', 'Roboto Mono', monospace;
  --surface-container-low: #0f0d13;
  --surface-container-high: #211f26;
}

[data-theme="light"] {
  --surface: #fdf8fd;
  --surface-variant: #e7e0ec;
  --on-surface: #1c1b1f;
  --on-surface-variant: #49454f;
  --outline: #79747e;
  --primary-container: #eaddff;
  --on-primary-container: #21005d;
  --surface-container-low: #f5f0f8;
  --surface-container-high: #eae2f0;
}

[data-theme="amoled"] {
  --surface: #000000;
  --surface-variant: #121212;
  --on-surface: #ffffff;
  --on-surface-variant: #e0e0e0;
  --outline: #2c2c2c;
  --primary-container: #1a1a1a;
  --on-primary-container: #ffffff;
  --surface-container-low: #000000;
  --surface-container-high: #121212;
}

/* Global Reset & Base Layout */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Roboto", sans-serif;
  background-color: var(--surface);
  color: var(--on-surface);
  height: 100vh;
  overflow: hidden;
  display: flex;
}

#appContainer {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

/* Sidebar Navigation Dock */
.sidebar-dock {
  width: var(--sidebar-width);
  background: var(--surface-container-low);
  border-right: 1px solid var(--outline);
  display: flex;
  flex-direction: column;
  transition: width var(--anim-speed) cubic-bezier(0.4, 0, 0.2, 1);
  flex-shrink: 0;
  z-index: 100;
}

.sidebar-dock.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 16px;
  border-bottom: 1px solid var(--outline);
  overflow: hidden;
  white-space: nowrap;
  gap: 12px;
}

.sidebar-menu {
  flex: 1;
  padding: 12px 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.menu-item {
  display: flex;
  align-items: center;
  padding: 12px 20px;
  color: var(--on-surface-variant);
  text-decoration: none;
  cursor: pointer;
  border-left: 3px solid transparent;
  font-weight: 500;
  font-size: 0.95rem;
  transition: all var(--anim-speed) ease;
  gap: 16px;
}

.menu-item:hover,
.menu-item.active {
  background: var(--primary-container);
  color: var(--on-primary-container);
}

.menu-item.active {
  border-left-color: var(--primary);
}

.menu-label {
  transition: opacity var(--anim-speed);
  white-space: nowrap;
}

.sidebar-dock.collapsed .menu-label,
.sidebar-dock.collapsed .logo-title {
  opacity: 0;
  display: none;
}

/* UI Sprite SVGs Sizing */
.nav-icon {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  fill: none;
  flex-shrink: 0;
}

.app-icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
}

/* Primary Workspace Viewport */
.workspace-viewport {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
}

.app-bar {
  height: var(--header-height);
  background-color: var(--surface);
  border-bottom: 1px solid var(--outline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  flex-shrink: 0;
  z-index: 10;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--primary);
  cursor: pointer;
}

.search-container {
  flex: 1;
  max-width: 500px;
  margin: 0 1rem;
  background: var(--surface-variant);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  padding: 0 1rem;
}

.search-container input {
  width: 100%;
  padding: 10px;
  background: transparent;
  border: none;
  color: var(--on-surface);
  font-size: 1rem;
  outline: none;
}

.actions {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.icon-btn {
  background: transparent;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  color: var(--on-surface-variant);
  transition: background-color var(--anim-speed);
}

.icon-btn:hover {
  background: rgba(103, 80, 164, 0.12);
}

.color-picker-wrapper input {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 2px solid var(--outline);
  padding: 0;
  cursor: pointer;
}

/* Tab & Overlay Views Layout */
.tab-view {
  display: none;
  flex-direction: column;
  width: 100%;
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  padding: 1.5rem;
}

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

.page-view {
  flex: 1;
  overflow-y: auto;
  display: none;
  position: relative;
  padding-bottom: 2rem;
}

.page-view.active {
  display: block;
}

.hidden {
  display: none !important;
}

/* Gallery View Structure */
.tags-section {
  padding: 0.5rem 1.5rem;
  background: var(--surface);
}

.tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 8px;
}

.chip {
  background: var(--surface-variant);
  color: var(--on-surface-variant);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background-color var(--anim-speed), color var(--anim-speed);
}

.chip.active,
.chip:hover {
  background: var(--primary);
  color: var(--on-primary);
}

main {
  padding: 1.5rem;
}

.icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 16px;
}

.icon-card {
  background: var(--surface-container-low);
  border: 1px solid var(--outline);
  border-radius: var(--radius-md);
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  position: relative;
  transition: all var(--anim-speed) ease;
}

.icon-card:hover {
  border-color: var(--primary);
  background: var(--primary-container);
  transform: translateY(-2px);
}

.icon-card svg {
  width: 50px;
  height: 50px;
  fill: var(--primary);
  transition: fill var(--anim-speed);
}

.icon-card:hover svg {
  fill: var(--on-primary-container);
}

.icon-name {
  margin-top: 10px;
  font-size: 0.75rem;
  text-align: center;
  color: var(--on-surface-variant);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 90%;
}

.skeleton {
  width: 50px;
  height: 50px;
  background: var(--surface-variant);
  border-radius: var(--radius-md);
}

/* Detail Customize Canvas Workspace */
.detail-container {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.back-nav {
  margin: 1rem 1.5rem;
  width: fit-content;
}

.viewer-layout {
  flex: 1;
  display: flex;
  border-top: 1px solid var(--outline);
}

.preview-pane {
  flex: 1;
  background: var(--surface-container-high);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  overflow: hidden;
  position: relative;
}

.checkerboard {
  background-image:
    linear-gradient(45deg, #ccc 25%, transparent 25%),
    linear-gradient(-45deg, #ccc 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ccc 75%),
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 20px 20px;
  background-position: 0 0, 0 10px, 10px -10px, -10px 0;
  border: 1px solid rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  min-width: 300px;
  min-height: 300px;
}

.bg-toolbar {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: var(--surface);
  padding: 6px;
  border-radius: var(--radius-lg);
  display: flex;
  gap: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  z-index: 10;
  border: 1px solid var(--outline);
}

.bg-opt {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.2s, border-color 0.2s;
}

.bg-opt:hover {
  transform: scale(1.1);
}

.bg-opt.active {
  border-color: var(--primary);
  transform: scale(1.1);
}

.bg-white {
  background-color: #ffffff;
  border: 1px solid #ccc;
}

.bg-black {
  background-color: #000000;
}

.bg-check {
  background-image:
    linear-gradient(45deg, #ccc 25%, transparent 25%),
    linear-gradient(-45deg, #ccc 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #ccc 75%),
    linear-gradient(-45deg, transparent 75%, #ccc 75%);
  background-size: 10px 10px;
  background-color: #fff;
}

.canvas-bg-white {
  background: #ffffff !important;
  background-image: none !important;
}

.canvas-bg-black {
  background: #000000 !important;
  background-image: none !important;
  border-color: #333;
}

/* Customize Controls Bar */
.controls-pane {
  width: 350px;
  background: var(--surface);
  border-left: 1px solid var(--outline);
  padding: 1.5rem;
  overflow-y: auto;
}

.header-group {
  margin-bottom: 1.5rem;
}

.tabs {
  display: flex;
  border-bottom: 1px solid var(--outline);
  margin-bottom: 1.5rem;
}

.tab-btn {
  flex: 1;
  padding: 10px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  color: var(--on-surface-variant);
  font-weight: 500;
}

.tab-btn.active {
  border-color: var(--primary);
  color: var(--primary);
  font-weight: bold;
}

.tab-content {
  display: none;
}

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

.control-group {
  margin-bottom: 1.2rem;
}

.control-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
}

.color-row {
  display: flex;
  gap: 1rem;
}

.half {
  flex: 1;
}

.color-input-styled {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface-variant);
  padding: 5px 10px;
  border-radius: 8px;
}

input[type="color"] {
  border: none;
  background: none;
  width: 24px;
  height: 24px;
  cursor: pointer;
}

.divider {
  border: 0;
  border-top: 1px solid var(--outline);
  margin: 1rem 0;
  opacity: 0.3;
}

/* Core Buttons Styles */
.btn {
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: background-color var(--anim-speed), transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-filled {
  background: var(--primary);
  color: var(--on-primary);
}

.btn-filled:hover {
  background-color: #553e8d;
}

.btn-tonal {
  background: var(--primary-container);
  color: var(--on-primary-container);
}

.btn-tonal:hover {
  background-color: #3b286b;
}

.btn-small {
  position: absolute;
  top: 10px;
  right: 10px;
  width: auto;
  font-size: 0.8rem;
  padding: 4px 12px;
}

.btn-tiny {
  background: var(--outline);
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 0.7rem;
  padding: 2px 6px;
  cursor: pointer;
  margin-left: auto;
}

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

/* Custom Checkbox overlays for Selection */
.checkbox-group {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--outline);
}

.checkbox-group input {
  width: auto;
  accent-color: var(--primary);
}

/* Drag over overlays */
.dropzone-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(103, 80, 164, 0.15);
  border: 4px dashed var(--primary);
  z-index: 1000;
  display: none;
  justify-content: center;
  align-items: center;
  pointer-events: none;
}

.dropzone-overlay.active {
  display: flex;
}

/* Multi-select Floating Toolbar styling */
.selection-toolbar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(120px);
  background: var(--on-surface);
  color: var(--surface);
  padding: 12px 24px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  z-index: 999;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

.selection-toolbar.active {
  transform: translateX(-50%) translateY(0);
}

/* Context Menu style */
.context-menu {
  position: absolute;
  background: var(--surface-container-high);
  border: 1px solid var(--outline);
  border-radius: var(--radius-md);
  padding: 8px 0;
  min-width: 160px;
  z-index: 10000;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  display: none;
}

.context-menu-item {
  padding: 8px 16px;
  cursor: pointer;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--on-surface);
}

.context-menu-item:hover {
  background: var(--primary-container);
  color: var(--on-primary-container);
}

/* Command Palette styles */
.command-palette-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: none;
  justify-content: center;
  align-items: flex-start;
  padding-top: 10vh;
}

.command-palette {
  width: 100%;
  max-width: 600px;
  background: var(--surface-container-low);
  border-radius: var(--radius-lg);
  border: 1px solid var(--outline);
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4);
  overflow: hidden;
}

.cmd-input-wrapper {
  display: flex;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--outline);
}

.cmd-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--on-surface);
  font-size: 1.1rem;
}

.cmd-list {
  max-height: 350px;
  overflow-y: auto;
  padding: 8px;
}

.cmd-item {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--on-surface-variant);
}

.cmd-item.selected,
.cmd-item:hover {
  background: var(--primary-container);
  color: var(--on-primary-container);
}

/* Code Playground Styles */
.code-block {
  position: relative;
  background: #1e1e1e;
  color: #d4d4d4;
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  margin-bottom: 1rem;
}

.code-block pre {
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 300px;
}

/* Toast Messages */
.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--on-surface);
  color: var(--surface);
  padding: 10px 20px;
  border-radius: 20px;
  z-index: 10001;
}

/* Adaptive Responsive Layout Rules */
@media (max-width: 768px) {
  .viewer-layout {
    flex-direction: column;
  }

  .controls-pane {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--outline);
  }

  .page-view {
    padding-bottom: 60px;
  }
}