:root {
  color-scheme: dark;
  --bg: #222;
  --titlebar-bg: #2b2b2f;
  --menu-bg: #252526;
  --menu-border: #3c3c3c;
  --menu-item-hover: #094771;
  --menu-item-active: #3c3c3c;
  --menu-shadow: 0 8px 20px rgba(0, 0, 0, 0.45);
  --surface: #111;
  --surface-raised: #181818;
  --surface-overlay: rgba(41, 41, 41, 0.92);
  --text: #e6e9ef;
  --muted: #aab3c5;
  --border: #2a2a2a;
  --accent: #e6e6e6;
  --on-accent: #111;
  --accent-hover: #ffffff;
  --accent-muted: #797979;
  --danger: #ff6b7a;
  --preview-bg: #444;
  --editor-bg: #111;
  --button-disabled: #3b4356;
  --button-disabled-text: #b9c0d0;
  --shadow: 0 12px 28px rgba(0, 0, 0, 0.35);
  --canvas-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
  --selection-bg: rgba(255, 255, 255, 0.08);
  --active-line-bg: rgba(255, 255, 255, 0.04);
  --match-bg: rgba(255, 255, 255, 0.12);
  --match-outline: rgba(255, 255, 255, 0.2);
  --focus-ring: #cfcfcf;
  --code-default: #d7dbe3;
  --code-atom: #f4a6a6;
  --code-number: #f0c38e;
  --code-string: #b7e4a8;
  --code-comment: #8f98a8;
  --code-keyword: #f1b5ff;
  --code-variable: #cfd6e3;
  --code-variable-2: #9fd7f5;
  --code-variable-3: #f0d49e;
  --code-def: #ffe08a;
  --code-tag: #ff9c9c;
  --code-attribute: #ffd1a6;
  --code-builtin: #c7b2ff;
  --code-error: #ff7b86;
}

html,
body {
  height: 100%;
}

button {
  font-family: system-ui;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  margin: 0;
  padding: 8px;
  font-family: system-ui;
  background: var(--bg);
  color: var(--text);
}

/* Title bar */
.title-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 8px;
}

.titlebar-icon-btn {
  border: none;
  background: transparent;
  color: #d4d4d4;
  padding: 6px;
  border-radius: 4px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s ease, color 0.15s ease;
}

.titlebar-icon-btn:hover {
  background: var(--menu-item-active);
  color: #ffffff;
}

.titlebar-icon-btn > span {
  scale: 1.25;
}

.titlebar-icon-btn .material-symbols-rounded {
  font-size: 22px;
  line-height: 1;
}

.menu-bar {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1 1 auto;
}

.menu-section {
  position: relative;
  flex: 0 0 auto;
}

.menu-title {
  border: none;
  background: transparent;
  font-weight: 500;
  color: #d4d4d4;
  cursor: pointer;
  padding: 4px 10px;
  border-radius: 4px;
  user-select: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  transition: background 0.15s ease, color 0.15s ease;
}

.menu-title:hover,
.menu-section.open .menu-title {
  background: var(--menu-item-active);
  color: #ffffff;
}

.menu-content {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 240px;
  background: var(--menu-bg);
  border: 1px solid var(--menu-border);
  border-radius: 6px;
  padding: 6px 0;
  box-shadow: var(--menu-shadow);
  z-index: 20;
  flex-direction: column;
  gap: 0;
  align-items: stretch;
}

.menu-section.open .menu-content {
  display: flex;
}

.menu-item {
  width: 100%;
  border: none;
  background: transparent;
  color: #d4d4d4;
  text-align: left;
  font-size: 13px;
  padding: 6px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
}

.menu-item:hover,
.menu-item:focus-visible {
  background: var(--menu-item-hover);
  color: #ffffff;
  outline: none;
}

.menu-shortcut {
  color: #a0a0a0;
  font-size: 12px;
}

.menu-item:hover .menu-shortcut,
.menu-item:focus-visible .menu-shortcut {
  color: #ffffff;
}

.menu-status {
  padding: 6px 12px;
  font-size: 12px;
  color: #9da0a6;
}

.menu-separator {
  height: 1px;
  background: var(--menu-border);
  margin: 6px 0;
}

.menu-hidden-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.file-label,
.inline-label {
  font-size: 0.85rem;
  color: var(--muted);
}

/* Workspace layout */
.workspace {
  flex: 1;
  display: flex;
  height: clamp(360px, 60vh, 720px);
}

.editor-panel,
.preview-panel {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  border-radius: 8px;
}

.editor-panel {
  flex: 0 0 50%;
}

.preview-panel {
  flex: 1 1 0;
  background: var(--surface);
}

.panel-resizer {
  width: 6px;
  background: transparent;
  cursor: col-resize;
  position: relative;
}

.panel-resizer::after {
  content: 'drag_indicator';
  font-family: 'Material Symbols Rounded';
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  font-size: 18px;
  color: #d4d4d4;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--menu-bg);
  border: 1px solid var(--menu-border);
  border-radius: 8px;
  padding: 4px;
  z-index: 50;
  opacity: 0;
  transition: opacity 0.15s ease;
  pointer-events: none;
}

.panel-resizer:hover::after {
  opacity: 1;
}

.preview-area {
  flex: 1;
  background: var(--surface);
  overflow: hidden;
  position: relative;
}

.preview-top-controls {
  position: absolute;
  top: 0px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  z-index: 6;
  background: var(--surface-overlay);
  padding: 8px 12px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.preview-top-controls.is-collapsed {
  transform: translateY(-120%);
  opacity: 0;
  pointer-events: none;
}

.preview-top-controls .preview-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.preview-top-toggle {
  padding: 0;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.preview-top-toggle .material-symbols-rounded {
  font-size: 18px;
}

.preview-top-handle {
  position: absolute;
  top: 8px;
  left: 12px;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 7;
}

.preview-top-handle .material-symbols-rounded {
  font-size: 18px;
}

.preview-top-controls.is-collapsed + .preview-top-handle {
  opacity: 1;
  pointer-events: auto;
}

.preview-viewport {
  width: 100%;
  height: 100%;
  background: var(--preview-bg);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
  position: relative;
  cursor: grab;
  touch-action: none;
}

.preview-viewport.panning {
  cursor: grabbing;
}

canvas {
  box-shadow: var(--canvas-shadow);
  border-radius: 6px;
  position: absolute;
  top: 0;
  left: 0;
  transform-origin: 0 0;
  will-change: transform;
}

/* Controls */
button {
  padding: 8px 14px;
  background: var(--accent);
  color: var(--on-accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.1s ease;
}

.player-controls button {
  padding: 0;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.player-controls .material-symbols-rounded {
  font-size: 16px;
}

button:hover {
  background: var(--accent-hover);
}

button:active {
  transform: translateY(1px);
}

button:disabled {
  background: var(--button-disabled);
  cursor: not-allowed;
  color: var(--button-disabled-text);
}

input[type="number"],
input[type="file"],
input[type="range"] {
  accent-color: var(--accent);
}

input[type="number"] {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 5px 8px;
  width: 84px;
}

input[type="number"]:focus {
  outline: 2px solid var(--focus-ring);
  outline-offset: 1px;
}

input[type="range"] {
  flex-grow: 1;
}

.zoom-controls {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

@media (max-width: 720px) {
  .preview-top-controls {
    gap: 8px;
  }

  .preview-top-controls .preview-inputs,
  .preview-top-controls .zoom-controls {
    width: 100%;
    justify-content: flex-start;
  }

  .zoom-controls button {
    padding: 4px 6px;
  }

  #zoom-level {
    min-width: 36px;
  }
}

.preview-overlay-controls {
  position: absolute;
  left: 18px;
  bottom: 18px;
  background: var(--surface-overlay);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  box-shadow: var(--shadow);
  z-index: 5;
}

.preview-overlay-controls .zoom-controls button,
.zoom-controls button {
  padding: 6px 10px;
}

#zoom-level {
  min-width: 48px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
}

.player-controls {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: center;
  padding: 10px 12px;
  border-top: 1px solid var(--border);
}

.transport-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.preview-inputs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#btn-repeat[aria-pressed="true"],
.speed-toggle[aria-pressed="true"] {
  background: var(--accent-hover);
}

.seekbar {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 8px 12px 12px;
  color: var(--muted);
}

#lint-status,
#export-status {
  font-size: 0.9em;
  color: var(--muted);
}

/* Editor */
.code-editor {
  flex: 1;
  border-radius: 10px;
  overflow: hidden;
}

.CodeMirror {
  height: 100%;
  border-radius: 8px;
  font-size: 13px;
  background: var(--editor-bg);
  color: var(--text);
}

.CodeMirror pre {
  color: var(--code-default);
}

.cm-s-default .cm-atom {
  color: var(--code-atom);
}

.cm-s-default .cm-number {
  color: var(--code-number);
}

.cm-s-default .cm-string,
.cm-s-default .cm-string-2 {
  color: var(--code-string);
}

.cm-s-default .cm-comment {
  color: var(--code-comment);
}

.cm-s-default .cm-keyword {
  color: var(--code-keyword);
}

.cm-s-default .cm-variable {
  color: var(--code-variable);
}

.cm-s-default .cm-variable-2 {
  color: var(--code-variable-2);
}

.cm-s-default .cm-variable-3 {
  color: var(--code-variable-3);
}

.cm-s-default .cm-def {
  color: var(--code-def);
}

.cm-s-default .cm-tag {
  color: var(--code-tag);
}

.cm-s-default .cm-attribute {
  color: var(--code-attribute);
}

.cm-s-default .cm-builtin {
  color: var(--code-builtin);
}

.cm-s-default .cm-error {
  color: var(--code-error);
}

.CodeMirror-gutters {
  background: var(--editor-bg);
  border-right: 1px solid var(--border);
}

.CodeMirror-linenumber {
  color: var(--muted);
}

.CodeMirror-cursor {
  border-left: 1px solid var(--text);
}

.CodeMirror-selected,
.CodeMirror-focused .CodeMirror-selected {
  background: var(--selection-bg);
}

.CodeMirror-activeline-background {
  background: var(--active-line-bg);
}

.CodeMirror-matchingbracket {
  color: var(--text);
  background: var(--match-bg);
  outline: 1px solid var(--match-outline);
}

.CodeMirror-scroll {
  overflow: auto;
}

.cm-lint-marker {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--danger);
  display: inline-block;
  margin-top: 4px;
}

@media (max-width: 900px) {
  .workspace {
    flex-direction: column;
    height: auto;
  }

  .panel-resizer {
    width: 100%;
    height: 6px;
    cursor: row-resize;
  }
}