/* ==========================================================
   1. CSS VARIABLES & SYSTEM CONFIG
   ========================================================== */
:root {
  /* Fonts */
  --font-main: 'PixbobSans', 'Courier New', Courier, monospace;
  --font-icon: 'PixBob Icons', sans-serif;

  /* Theme Colors */
  --bg-app: #18181c;
  --bg-panel: #222228;
  --bg-dark: #101012;
  --bg-card: #18181c;
  
  --border-color: #303038;
  --border-card: #2a2a32;
  --border-hover: #6c7380;

  --text-main: #a0a0ac;
  --text-bright: #ffffff;
  --text-muted: #60606a;
  
  /* Accent Colors */
  --accent-primary: #d47028;
  --accent-primary-hover: #ff9e3b;
  --btn-secondary: #4a505b;
  --btn-secondary-hover: #5a616e;
  --danger-color: #e57e34;
  --danger-dark: #a32a2a;
  
  /* Shadows */
  --shadow-btn: 0 3px 0px #08080a;
  --shadow-panel: 0 6px 0px #08080a;
}

/* ==========================================================
   2. FONTS REGISTRATION & ICON SYSTEM
   ========================================================== */
/* Path disesuaikan jika font ada di folder assets/ */
@font-face {
  font-family: 'PixbobSans';
  src: url('assets/Pixbob_Sans.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}

@font-face {
  font-family: 'PixbobSans';
  src: url('assets/Pixbob_Sans_Bold.ttf') format('truetype');
  font-weight: bold;
  font-style: normal;
}

@font-face {
  font-family: 'PixBob Icons';
  src: url('assets/PixBob_Icons.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}

.icon-font {
  font-family: var(--font-icon) !important;
  font-style: normal;
  font-weight: normal;
  font-size: 18px;
  line-height: 1;
  text-transform: none !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  -webkit-font-smoothing: antialiased;
}

.vertical-toolbar .btn-tool .icon-font {
  font-size: 20px;
}

.header-actions .icon-font,
.canvas-actions .icon-font {
  font-size: 18px;
}

.icon-btn .icon-font {
  color: currentColor;
  font-size: 16px;
}

/* ==========================================================
   3. GLOBAL RESET & BASE LAYOUT
   ========================================================== */
* { 
  box-sizing: border-box; 
  margin: 0; 
  padding: 0; 
}

html, body {
  height: 100vh;
  max-height: 100vh;
  overflow: hidden;
}

body { 
  font-family: var(--font-main); 
  background-color: var(--bg-app); 
  color: var(--text-main); 
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 20px;

  -webkit-font-smoothing: none;
  -moz-osx-font-smoothing: none;
  text-rendering: optimizeSpeed;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.panel { 
  background: var(--bg-panel); 
  border: 2px solid var(--border-color); 
  padding: 20px; 
  box-shadow: var(--shadow-panel); 
}

.app-layout { 
  display: flex; 
  gap: 20px; 
  flex-wrap: nowrap; 
  width: 100%;
  max-width: 1100px;
  flex: 1;
  min-height: 0;
}

/* ==========================================================
   4. UI CONTROLS & BUTTON STYLES
   ========================================================== */
button { 
  padding: 8px 12px; 
  border-radius: 0px; 
  border: 2px solid var(--border-color); 
  font-family: inherit;
  font-weight: bold; 
  font-size: 12px;
  text-transform: uppercase !important;
  cursor: pointer; 
  transition: all 0.1s ease; 
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: var(--shadow-btn);
}

button:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0px #08080a;
}

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
  transform: none !important;
}

.btn-primary { 
  background: var(--accent-primary); 
  color: var(--text-bright); 
  border-color: var(--accent-primary-hover); 
}
.btn-primary:hover { 
  background: var(--text-bright); 
  color: var(--accent-primary); 
  border-color: var(--accent-primary-hover); 
}

.btn-secondary { 
  background: var(--btn-secondary); 
  color: #f0f2f5; 
  border-color: var(--border-hover); 
}
.btn-secondary:hover { 
  background: var(--btn-secondary-hover); 
  color: var(--text-bright); 
  border-color: #8b93a0;
}

.btn-danger { 
  background: var(--btn-secondary); 
  color: #f0f2f5; 
  border-color: var(--border-hover); 
}
.btn-danger:hover { 
  background: var(--danger-color); 
  color: var(--text-bright);
  border-color: var(--accent-primary-hover); 
}

.icon-btn {
  color: inherit;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* Custom Stepper Control */
.pixel-stepper {
  display: flex;
  align-items: center;
  background: var(--bg-dark);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  overflow: hidden;
}

.pixel-stepper input[type="number"] {
  background: transparent;
  border: none;
  color: #fff;
  text-align: center;
  width: 100%;
  font-size: 12px;
  font-family: inherit;
  font-weight: bold;
  outline: none;
  appearance: none;           /* Properti standar */
  -moz-appearance: textfield; /* Fallback khusus Firefox */
}

.pixel-stepper input[type="number"]::-webkit-inner-spin-button, 
.pixel-stepper input[type="number"]::-webkit-outer-spin-button { 
  -webkit-appearance: none;
  margin: 0;
}

.btn-step {
  background: var(--btn-secondary);
  color: var(--text-bright);
  border: none;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: bold;
  cursor: pointer;
  box-shadow: none;
  transition: background 0.1s ease;
}

.btn-step:hover {
  background: var(--accent-primary-hover);
  color: var(--bg-dark);
}

.btn-step:active {
  transform: none;
}

/* ==========================================================
   5. HEADER & POPOVER MENUS
   ========================================================== */
header { 
  display: flex; 
  justify-content: space-between; 
  align-items: center; 
  gap: 16px;
  margin-bottom: 16px; 
  border-bottom: 2px solid var(--border-color); 
  padding-bottom: 12px; 
  width: 100%;
  max-width: 1100px;
  flex-shrink: 0;
  position: relative;
  z-index: 100;
}

.brand-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: flex-start;
}

.app-logo {
  height: 28px;
  width: auto;
  object-fit: contain;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
}

.file-status {
  font-size: 13px;
  color: var(--text-main);
  letter-spacing: 0.5px;
}

.header-actions { 
  display: flex; 
  align-items: center; 
  gap: 8px; 
  flex-wrap: wrap;
  justify-content: flex-end;
}

.save-wrapper,
.export-wrapper {
  position: relative;
  display: inline-block;
}

.save-popover,
.export-popover {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--bg-panel);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-panel);
  box-sizing: border-box;
  flex-direction: column;
  z-index: 999;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.save-popover {
  width: 150px;
  padding: 6px;
  gap: 6px;
}

.export-popover {
  width: 220px;
  padding: 10px;
  gap: 8px;
}

.save-popover.show,
.export-popover.show {
  display: flex;
}

.save-popover button {
  width: 100%;
  justify-content: flex-start;
  font-size: 11px;
  box-shadow: none;
}

.export-popover label {
  font-size: 10px;
  color: var(--text-main);
  text-transform: uppercase;
  font-weight: bold;
}

.export-popover input[type="text"] {
  background: var(--bg-dark); 
  border: 2px solid var(--border-color); 
  color: var(--text-bright); 
  padding: 8px 10px; 
  font-family: inherit;
  font-size: 13px;
  width: 100%;
  outline: none;
}

.export-popover input[type="text"]:focus {
  border-color: var(--accent-primary-hover);
}

/* ==========================================================
   6. LEFT PANEL: CANVAS EDITOR & TOOLBARS
   ========================================================== */
.editor-section { 
  display: flex; 
  flex-direction: column; 
  gap: 16px; 
  align-items: stretch; 
  width: auto; 
  min-width: 324px;
  box-sizing: border-box;
}

.active-char-box { 
  display: flex; 
  align-items: center; 
  gap: 10px; 
  width: 100%; 
  justify-content: space-between; 
  box-sizing: border-box;
}

.active-char-box span { 
  font-size: 13px; 
  font-weight: bold; 
  text-transform: uppercase; 
  color: var(--text-bright); 
}

.active-char-box input { 
  background: var(--bg-dark); 
  border: 2px solid var(--border-color); 
  color: var(--accent-primary-hover); 
  font-family: inherit;
  font-size: 16px; 
  font-weight: bold; 
  width: 46px; 
  text-align: center; 
  padding: 4px; 
  outline: none;
}

.glyph-navigation {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.glyph-navigation input {
  text-align: center;
  width: 32px;
  height: 32px;
  font-size: 14px;
  padding: 0;
}

.glyph-navigation .icon-btn {
  width: 28px;
  height: 28px;
  font-size: 11px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  -webkit-user-select: none;
  color: #050505;
}

.glyph-navigation .icon-btn:focus,
.glyph-navigation .icon-btn:focus-visible {
  outline: none;
  box-shadow: none;
}

.editor-workspace {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 10px;
  width: 100%;
  box-sizing: border-box;
}

.vertical-toolbar {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 36px;
  flex-shrink: 0;
}

.btn-tool { 
  padding: 8px; 
  border: 2px solid var(--border-color); 
  background: var(--bg-app); 
  color: var(--text-main); 
  justify-content: center; 
  box-shadow: var(--shadow-btn);
}

.btn-tool:hover { 
  color: var(--text-bright); 
  background: #282830; 
}

.btn-tool.active { 
  background: var(--btn-secondary); 
  color: var(--text-bright); 
  border-color: #8b93a0; 
}

.canvas-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 256px;
}

canvas#pixelCanvas { 
  background-color: var(--bg-dark); 
  cursor: crosshair; 
  image-rendering: pixelated; 
  image-rendering: crisp-edges;
  border: 2px solid var(--border-color); 
  box-sizing: border-box;
  flex-shrink: 0;
  touch-action: none;
}

.canvas-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  box-sizing: border-box;
}

.history-group {
  display: flex;
  gap: 6px;
}

.canvas-actions .btn-icon {
  padding: 6px 10px;
  background-color: #232328;
  border: 1px solid #3a3a42;
  color: var(--text-bright);
  border-radius: 4px;
  cursor: pointer;
}

.canvas-actions .btn-icon:hover {
  background-color: #32323a;
}

.canvas-actions .btn-danger:hover,
#btnClear:hover {
  background-color: var(--danger-dark);
  border-color: #d33838;
  color: var(--text-bright);
}

/* ==========================================================
   7. RIGHT PANEL: WORKSPACE & TAB CONTROLS
   ========================================================== */
.workspace-section { 
  flex: 1; 
  min-width: 360px; 
  display: flex; 
  flex-direction: column; 
  gap: 16px; 
  height: 100%;
  min-height: 0;
}

.workspace-switch-container {
  display: flex;
  background: transparent;
  border: none;
  padding: 0;
  gap: 4px;
  width: 100%;
  position: relative;
  z-index: 1;
}

.view-tab-btn {
  flex: 1;
  background: var(--bg-dark);
  border: 2px solid var(--border-color);
  color: var(--text-main);
  padding: 8px 16px;
  font-size: 12px;
  font-family: inherit;
  font-weight: bold;
  cursor: pointer;
  text-align: center;
  outline: none;
  transition: all 0.1s ease;
  position: relative;
  box-shadow: none;
}

.view-tab-btn:hover {
  color: var(--text-bright);
  background: var(--bg-app);
}

.view-tab-btn.active {
  background: var(--bg-panel);
  color: var(--text-bright);
  border: 2px solid var(--border-color);
  border-bottom: 2px solid var(--bg-panel);
  margin-bottom: -2px;
  padding-top: 10px;
  z-index: 2;
}

.controls-panel {
  background: var(--bg-panel);
  border: 2px solid var(--border-color);
  padding: 12px;
  position: relative;
  z-index: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.workspace-view {
  display: none;
  width: 100%;
  flex: 1;
  min-height: 0;
}

.workspace-view.active {
  display: flex;
  flex-direction: column;
}

/* ==========================================================
   8. VIEW 1: GLYPH CATALOG & GRID
   ========================================================== */
.category-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
  width: 100%;
}

.category-tabs { 
  display: flex; 
  gap: 4px; 
  flex-wrap: wrap; 
}

.tab-btn { 
  padding: 6px 10px; 
  font-size: 11px; 
  background: var(--bg-dark); 
  border: 2px solid var(--border-color); 
  color: var(--text-main); 
  cursor: pointer; 
  font-family: inherit;
  font-weight: bold;
  box-shadow: 0 2px 0px #08080a;
}

.tab-btn:hover { 
  color: var(--text-bright); 
  background: #282830; 
}

.tab-btn.active { 
  background: var(--accent-primary-hover);
  color: var(--bg-dark);
  border-color: var(--accent-primary-hover);
}

.char-count-text {
  font-size: 11px;
  color: #FFF5EA;
  white-space: nowrap;
}

.glyph-grid { 
  display: grid; 
  grid-template-columns: repeat(auto-fill, minmax(56px, 1fr)); 
  gap: 8px; 
  align-items: start; 
  flex: 1;
  overflow-y: scroll;
  background: var(--bg-dark);
  padding: 8px;
  border: 2px solid var(--border-color);
  scrollbar-width: thin;
  scrollbar-color: var(--btn-secondary) var(--bg-dark);
}

.glyph-grid::-webkit-scrollbar {
  width: 8px;
}

.glyph-grid::-webkit-scrollbar-track {
  background: var(--bg-dark);
  border-left: 2px solid var(--border-color);
}

.glyph-grid::-webkit-scrollbar-thumb {
  background: var(--btn-secondary);
  border: 1px solid var(--border-color);
}

.glyph-grid::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

.glyph-card { 
  background: var(--bg-card); 
  border: 2px solid var(--border-card); 
  padding: 6px; 
  display: flex; 
  flex-direction: column; 
  align-items: center; 
  justify-content: center;
  width: 100%;
  aspect-ratio: 1 / 1; 
  box-sizing: border-box;
  cursor: pointer; 
  transition: all 0.1s ease;
}

.glyph-card:hover { 
  border-color: var(--border-hover); 
  background: #24242c; 
  transform: translateY(-2px); 
}

.glyph-card.active { 
  border-color: var(--accent-primary-hover); 
  background: var(--btn-secondary); 
  box-shadow: 0 0 0 1px var(--accent-primary-hover); 
}

.glyph-card canvas { 
  background: #08080a; 
  image-rendering: pixelated; 
  margin-bottom: 4px; 
  border: 1px solid var(--border-card); 
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.glyph-card .char-label { 
  font-size: 11px; 
  color: var(--text-main); 
  font-weight: bold; 
}

.glyph-card.active .char-label { 
  color: var(--text-bright); 
}

/* ==========================================================
   9. VIEW 2: LIVE TEXT PREVIEW & METRICS SPLIT LAYOUT
   ========================================================== */
.preview-layout-container {
  display: flex;
  flex-direction: row;
  width: 100%;
  height: 100%;
  min-height: 280px;
  position: relative;
  overflow: hidden;
  border: 2px solid var(--border-color);
  background: var(--bg-dark);
}

.preview-main-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 180px;
  overflow: hidden;
}

.preview-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 10px;
  background: var(--bg-card);
  border-bottom: 2px solid var(--border-color);
  font-size: 11px;
  font-weight: bold;
}

.preview-title {
  color: var(--text-bright);
}

.preview-controls-right, 
.zoom-control-group {
  display: flex;
  align-items: center;
  gap: 8px;
}

.zoom-control-group label {
  font-size: 10px;
  color: var(--text-main);
}

.zoom-control-group input[type="range"] {
  accent-color: var(--accent-primary-hover);
  cursor: pointer;
}

.interactive-preview-container {
  flex: 1;
  min-height: 220px;
  display: flex;
  align-items: flex-start;
  justify-content: flex-start; 
  background: var(--bg-dark);
  border: 2px solid var(--border-color);
  padding: 12px;
  overflow: auto;
  outline: none;
  cursor: text;
  transition: border-color 0.2s ease;
  scrollbar-width: thin;
  scrollbar-color: var(--btn-secondary) var(--bg-dark);
}

.interactive-preview-container::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.interactive-preview-container::-webkit-scrollbar-track {
  background: var(--bg-dark);
  border-left: 2px solid var(--border-color);
  border-top: 2px solid var(--border-color);
}

.interactive-preview-container::-webkit-scrollbar-thumb {
  background: var(--btn-secondary);
  border: 1px solid var(--border-color);
}

.interactive-preview-container::-webkit-scrollbar-thumb:hover {
  background: var(--accent-primary);
}

.interactive-preview-container:focus {
  border-color: var(--accent-primary-hover);
  box-shadow: 0 0 8px rgba(255, 158, 59, 0.2);
}

#canvasPreviewWrapper {
  display: inline-block;
  width: auto;
  height: auto;
}

#livePreviewCanvas {
  display: block;
  background: var(--bg-dark);
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  width: auto !important; 
  height: auto !important;
}

/* Resizer Bar & Toggle Button */
.preview-resizer {
  width: 8px;
  background: var(--border-color);
  cursor: col-resize;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  user-select: none;
  flex-shrink: 0;
  transition: background 0.2s;
  z-index: 5;
}

.preview-resizer:hover {
  background: var(--accent-primary-hover);
}

.btn-resizer-arrow {
  background: var(--bg-panel);
  border: 2px solid var(--border-color);
  color: var(--text-bright);
  border-radius: 0px;
  width: 18px;
  height: 18px;
  font-size: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 6;
  padding: 0;
  line-height: 1;
}

.btn-resizer-arrow:hover {
  background: var(--bg-dark);
  border-color: var(--accent-primary-hover);
  color: var(--accent-primary-hover);
}

/* Metrics Sidebar */
.metrics-sidebar {
  width: 220px;
  background: var(--bg-panel);
  border-left: 1px solid var(--border-color);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex-shrink: 0;
  overflow-y: auto;
  transition: width 0.1s ease, padding 0.1s ease;
}

.metrics-sidebar.collapsed {
  width: 0px !important;
  padding: 0px !important;
  overflow: hidden;
  border-left: none;
}

.metrics-header {
  font-size: 11px;
  font-weight: bold;
  color: var(--text-bright);
  text-transform: uppercase;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
}

.metric-control-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.metric-control-group label {
  font-size: 10px;
  font-weight: bold;
  color: var(--text-main);
}

.metric-checkbox-group {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 4px;
}

.metric-checkbox-group label {
  font-size: 10px;
  font-weight: bold;
  color: var(--text-main);
}

/* ==========================================================
   10. MODAL DIALOGS
   ========================================================== */
.welcome-modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(10, 10, 12, 0.85);
  backdrop-filter: blur(4px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.welcome-modal-card {
  background: var(--bg-panel);
  border: 2px solid var(--border-color);
  box-shadow: 0 8px 0px #08080a;
  width: 100%;
  max-width: 420px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  text-align: center;
}

.welcome-logo {
  height: 36px;
  margin-bottom: 6px;
}

.welcome-subtitle {
  font-size: 11px;
  color: var(--accent-primary-hover);
  letter-spacing: 1px;
  font-weight: bold;
}

.welcome-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.welcome-btn {
  justify-content: center;
  padding: 12px;
  font-size: 13px;
}

.welcome-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 2px solid var(--border-color);
  padding-top: 14px;
  margin-top: 4px;
}

.checkbox-label {
  font-size: 11px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
}

/* ==========================================================
   11. TOAST NOTIFICATION SYSTEM
   ========================================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 10000;
  pointer-events: none;
}

.toast {
  background: rgba(34, 34, 40, 0.95);
  backdrop-filter: blur(8px);
  color: var(--text-bright);
  border: 2px solid var(--border-color);
  padding: 8px 18px;
  font-family: var(--font-main);
  font-size: 11px;
  font-weight: normal;
  letter-spacing: 0.5px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4), 0 3px 0px #08080a;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  
  opacity: 0;
  transform: scale(0.85) translateY(12px);
  transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.15s ease;
  
  pointer-events: auto;
  user-select: none;
  white-space: nowrap;
}

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

.toast.toast-info,
.toast.toast-success {
  border-color: var(--accent-primary-hover);
}

.toast.toast-error {
  border-color: var(--danger-color);
  color: #ff5555;
}

/* ==========================================================
   12. APP FOOTER
   ========================================================== */
.app-footer {
  width: 100%;
  max-width: 1100px;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  margin-top: auto;
  border-top: 1px solid var(--border-color, #26262c);
  font-size: 10px;
  color: var(--text-muted, #60606a);
  user-select: none;
}

.btn-footer-help {
  background: transparent;
  border: none;
  color: var(--text-muted, #80808a);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  font-family: inherit;
  padding: 1px 5px;
  border-radius: 2px;
  line-height: 1;
  transition: color 0.12s ease, background 0.12s ease;
}

.btn-footer-help:hover {
  color: var(--text-bright, #ffffff);
  background: rgba(255, 255, 255, 0.06);
}

.btn-footer-help .icon-font {
  font-size: 11px;
}

.footer-version {
  font-size: 9px;
  letter-spacing: 0.5px;
  color: var(--text-muted, #50505a);
}

/* ==========================================================
   13. RESPONSIVE MEDIA QUERIES
   ========================================================== */
@media (max-width: 900px) {
  html, body {
    height: auto;
    max-height: none;
    overflow-x: hidden;
    overflow-y: auto;
  }

  body {
    padding: 12px;
  }

  .app-layout {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }

  .editor-section, 
  .workspace-section {
    width: 100%;
    min-width: 100%;
  }

  .editor-workspace {
    justify-content: center;
  }

  .glyph-grid {
    min-height: 250px;
    max-height: 350px;
  }

  .interactive-preview-container {
    min-height: 200px;
  }

  /* Split Layout Adjustment for Mobile (Stack Vertical) */
  .preview-layout-container {
    flex-direction: column !important;
    height: 100%;
  }

  .preview-main-area {
    flex: 1;
    min-height: 180px;
  }

  .preview-resizer {
    width: 100% !important;
    height: 10px !important;
    cursor: row-resize !important;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
  }

  .metrics-sidebar {
    width: 100% !important;
    height: 180px;
    min-height: 100px;
    border-left: none !important;
    border-top: 1px solid var(--border-color);
  }

  .metrics-sidebar.collapsed {
    height: 0px !important;
    min-height: 0px !important;
    padding: 0px !important;
    border-top: none !important;
  }
}

@media (max-width: 500px) {
  .save-popover {
    left: 0 !important;
    right: auto !important;
  }

  .export-popover {
    left: auto !important;
    right: 0 !important;
    max-width: calc(100vw - 32px);
  }

  body {
    padding: 8px;
  }

  header {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .brand-group {
    align-items: center;
  }

  .header-actions {
    justify-content: space-between;
    width: 100%;
  }

  .header-actions button {
    padding: 6px 10px;
    font-size: 11px;
  }

  .panel {
    padding: 12px;
  }

  .editor-workspace {
    gap: 8px;
  }

  .vertical-toolbar {
    width: 32px;
  }

  .btn-tool {
    padding: 6px;
  }

  .canvas-container {
    width: 100%;
    max-width: 256px;
  }

  .category-tabs {
    gap: 2px;
  }

  .tab-btn {
    padding: 6px 8px;
    font-size: 10px;
  }

  .glyph-grid {
    grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
    gap: 6px;
    padding: 6px;
  }
}