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

:root {
  --bg-primary: #1a3a2e;
  --bg-secondary: #234435;
  --bg-tertiary: #2d5a47;
  --accent: #6aaf6a;
  --accent-hover: #7ec87e;
  --text-primary: #e0ece4;
  --text-secondary: #9ab8a8;
  --border: #3d6b55;
  --success: #5cb85c;
  --warning: #e6c34f;
}

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

#app {
  display: flex;
  height: 100vh;
  height: 100dvh;
  width: 100vw;
}

#sidebar {
  width: 220px;
  min-width: 220px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 0;
}

.sidebar-header {
  padding: 20px 16px 12px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
  font-size: 20px;
  color: var(--accent);
  margin: 0;
}

.sidebar-header .subtitle {
  font-size: 11px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.sidebar-tabs {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 8px;
  gap: 2px;
}

.tab-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.15s;
  text-align: left;
  width: 100%;
}

.tab-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-left: 3px solid var(--accent);
}

.tab-icon { font-size: 18px; }

.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
}

.btn-run {
  flex: 1;
  padding: 10px;
  background: var(--success);
  color: #000;
  border: none;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  font-size: 14px;
}

.btn-run:hover { background: #6dca6d; }

.btn-stop {
  padding: 10px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  font-size: 14px;
}

.btn-stop:hover { background: var(--accent-hover); }

#main-content {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.tab-content {
  display: none;
  height: 100%;
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
}

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

.editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  min-height: 52px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
  z-index: 1;
}

.editor-header h2 {
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.2px;
}

.editor-header-icon { font-size: 16px; }

/* PIXEL EDITOR */
.pixel-editor-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

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

.sprite-controls input {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 6px 10px;
  border-radius: 6px;
  font-family: monospace;
  font-size: 13px;
  width: 140px;
  transition: border-color 0.15s;
}

.sprite-controls input:focus {
  outline: none;
  border-color: var(--accent);
}

.sprite-controls button {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.sprite-controls button:hover { background: var(--accent); border-color: var(--accent); }
.sprite-controls button:active { transform: translateY(1px); }

.pixel-editor-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.editor-left {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 16px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
  overflow-y: auto;
}

.editor-right {
  width: 200px;
  min-width: 200px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  padding: 16px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
  overflow-y: auto;
}

.editor-right h3 {
  font-size: 13px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.sprite-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sprite-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.sprite-item:hover { border-color: var(--accent); }

.sprite-item canvas {
  width: 48px;
  height: 48px;
  image-rendering: pixelated;
  border-radius: 4px;
}

.sprite-item .sprite-name {
  font-size: 12px;
  font-family: monospace;
  color: var(--text-primary);
}

.sprite-item .sprite-del {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 16px;
  opacity: 0.5;
}

.sprite-item .sprite-del:hover { opacity: 1; }

.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
  align-items: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
}

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

.toolbar-divider {
  width: 1px;
  align-self: stretch;
  min-height: 24px;
  background: var(--border);
}

.tool-btn {
  padding: 8px 10px;
  border: 2px solid var(--border);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
}

.tool-btn svg { display: block; }

.tool-btn:hover { background: var(--accent); border-color: var(--accent); }
.tool-btn.active { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 0 2px rgba(106, 175, 106, 0.35); }
.tool-btn:active { transform: translateY(1px); }
.tool-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.toolbar input[type="color"] { width: 40px; height: 36px; padding: 2px; border: 2px solid var(--border); border-radius: 6px; background: var(--bg-tertiary); cursor: pointer; }
.toolbar input[type="number"] {
  width: 50px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 4px 6px;
  border-radius: 4px;
  transition: border-color 0.15s;
}
.toolbar input[type="number"]:focus { outline: none; border-color: var(--accent); }
.tool-label { font-size: 12px; color: var(--text-secondary); display: flex; align-items: center; gap: 6px; }
.tool-checkbox { cursor: pointer; user-select: none; }
.tool-checkbox input[type="checkbox"] { accent-color: var(--accent); width: 14px; height: 14px; cursor: pointer; }

.resolution-control {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-tertiary);
  border: 2px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
}

.resolution-icon { font-size: 13px; color: var(--text-secondary); }

.res-input {
  width: 44px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 4px 4px;
  border-radius: 4px;
  font-size: 12px;
  text-align: center;
  transition: border-color 0.15s;
}
.res-input:focus { outline: none; border-color: var(--accent); }

.res-sep { color: var(--text-secondary); font-size: 12px; }

.res-apply-btn {
  background: var(--accent);
  border: none;
  color: #fff;
  width: 24px;
  height: 24px;
  min-width: 24px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.1s;
}
.res-apply-btn:hover { background: var(--accent-hover); }
.res-apply-btn:active { transform: translateY(1px); }

.palette {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
  max-width: 500px;
}

.palette-color {
  width: 26px;
  height: 26px;
  border: 2px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: transform 0.12s, border-color 0.12s, box-shadow 0.12s;
}
.palette-color:hover { transform: scale(1.15); box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25); }
.palette-color.active { border-color: #fff; box-shadow: 0 0 0 2px var(--accent); }

.canvas-wrapper {
  border: 2px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  display: inline-block;
  background: #1a3a2e;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

.canvas-wrapper canvas { display: block; cursor: crosshair; }
.canvas-info { margin-top: 8px; color: var(--text-secondary); font-size: 11px; }

/* CODE EDITOR */
.code-editor-container {
  display: none;
  flex-direction: column;
  height: 100%;
}
.code-editor-container.active {
  display: flex;
}

.code-editor-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.code-editor-wrapper {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding-bottom: env(safe-area-inset-bottom);
}

.code-editor-wrapper {
  background: #0d131f;
}

.code-editor-wrapper::-webkit-scrollbar {
  width: 10px;
}

.code-editor-wrapper::-webkit-scrollbar-track {
  background: #2d2d2d;
}

.code-editor-wrapper::-webkit-scrollbar-thumb {
  background: #555;
  border-radius: 5px;
}

.code-editor-wrapper::-webkit-scrollbar-thumb:hover {
  background: #777;
}

.code-editor-wrapper .cm-editor {
  height: 100%;
  font-size: 14px;
}

.code-editor-wrapper .cm-scroller {
  overflow: auto;
}

.code-editor-wrapper .cm-scroller::-webkit-scrollbar {
  width: 10px;
}

.code-editor-wrapper .cm-scroller::-webkit-scrollbar-track {
  background: #2d2d2d;
}

.code-editor-wrapper .cm-scroller::-webkit-scrollbar-thumb {
  background: #555;
  border-radius: 5px;
}

.code-editor-wrapper .cm-scroller::-webkit-scrollbar-thumb:hover {
  background: #777;
}

.code-editor-wrapper .CodeMirror {
  height: 100% !important;
  font-size: 14px;
  background: #fdf6e3;
}

.code-editor-wrapper .CodeMirror-gutters {
  background: #eee8d5;
  border-right: 1px solid #ddd6c1;
}

.code-editor-wrapper .CodeMirror-foldgutter-open,
.code-editor-wrapper .CodeMirror-foldgutter-closed {
  cursor: pointer;
  color: #93a1a1;
}

.code-editor-wrapper .CodeMirror-foldgutter-open::after {
  content: '▾';
}

.code-editor-wrapper .CodeMirror-foldgutter-closed::after {
  content: '▸';
}

.code-sidebar {
  width: 240px;
  min-width: 240px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  padding: 16px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
  overflow-y: auto;
}

.code-sidebar h3 {
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.api-ref { display: flex; flex-direction: column; gap: 10px; }

.api-item {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
}

.api-item code {
  display: block;
  color: var(--warning);
  font-size: 12px;
  margin-bottom: 4px;
}

.api-item span {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1.4;
}

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

.file-name {
  font-family: monospace;
  font-size: 13px;
  color: var(--text-secondary);
  background: var(--bg-primary);
  padding: 4px 10px;
  border-radius: 4px;
}

#formatBtn {
  padding: 4px 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}

/* SCENE */
.scene-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.scene-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.scene-canvas-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  padding: 20px;
  position: relative;
}

/* CSS-only fullscreen overlay (see Scene.jsx) — works inside iframes that
   aren't granted the "fullscreen" Permissions-Policy, unlike the native
   Fullscreen API. */
.scene-canvas-wrapper.pseudo-fullscreen {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 9999;
  background: #000;
  padding: 0;
}

#sceneCanvas {
  border: 2px solid var(--border);
  border-radius: 6px;
  background: #2d5a47;
  max-width: 100%;
  max-height: 100%;
}

.scene-canvas-wrapper.pseudo-fullscreen #sceneCanvas {
  max-width: 100%;
  max-height: 100%;
  border: none;
  border-radius: 0;
}

.scene-fullscreen-btn {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 15, 26, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  color: #fff;
  cursor: pointer;
  backdrop-filter: blur(4px);
  transition: background 0.15s, border-color 0.15s, transform 0.1s;
  z-index: 5;
}
.scene-fullscreen-btn svg { width: 18px; height: 18px; display: block; }
.scene-fullscreen-btn:hover { background: rgba(106, 175, 106, 0.55); border-color: var(--accent); }
.scene-fullscreen-btn:active { transform: translateY(1px); }
.scene-fullscreen-btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }


.scene-output {
  width: 280px;
  min-width: 280px;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.scene-output h3 {
  padding: 12px 16px;
  font-size: 12px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--border);
}

.console-output {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px;
  padding-bottom: calc(8px + env(safe-area-inset-bottom));
  font-family: 'Cascadia Code', 'JetBrains Mono', monospace;
  font-size: 12px;
  line-height: 1.5;
}

.console-output .log { color: var(--text-secondary); }
.console-output .warn { color: var(--warning); }
.console-output .error { color: var(--accent); }

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

#sceneResetBtn {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
}

#sceneResetBtn:hover { background: var(--accent); }

/* TOUCH CONTROLS (mobile) */
.scene-touch-controls {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  justify-content: space-between;
  padding: 8px 12px 16px;
  background: linear-gradient(transparent, rgba(0,0,0,0.7));
  pointer-events: none;
  touch-action: none;
}

.scene-touch-controls.active {
  display: flex;
}

.touch-dpad {
  display: grid;
  grid-template-columns: 56px 56px 56px;
  grid-template-rows: 56px 56px;
  gap: 4px;
  pointer-events: auto;
  touch-action: manipulation;
}

.touch-btn {
  width: 56px;
  height: 56px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  transition: background 0.1s;
}

.touch-btn:active,
.touch-btn.pressed {
  background: rgba(106,175,106,0.5);
  border-color: var(--accent);
}

.touch-btn.empty {
  visibility: hidden;
}

.touch-actions {
  display: flex;
  flex-direction: column;
  gap: 4px;
  pointer-events: auto;
  touch-action: manipulation;
}

.touch-action-btn {
  width: 64px;
  height: 56px;
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 12px;
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  touch-action: manipulation;
  transition: background 0.1s;
}

.touch-action-btn:active,
.touch-action-btn.pressed {
  background: rgba(233,69,96,0.5);
  border-color: #e94560;
}

/* DOCS */
.docs-container {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.docs-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.docs-nav {
  width: 240px;
  min-width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 12px 0;
  padding-bottom: calc(12px + env(safe-area-inset-bottom));
}

.docs-nav a {
  display: block;
  padding: 8px 20px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  cursor: pointer;
  border-left: 2px solid transparent;
  transition: all 0.15s;
}

.docs-nav a:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.docs-nav a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--bg-tertiary);
}

.docs-nav a[href="#demos"] {
  position: relative;
  background: #ff8c00;
  color: #000 !important;
  border-radius: 0 8px 8px 0;
  margin: 6px 8px 6px 0;
  font-weight: 800;
  font-size: 14px;
  padding: 10px 20px;
  border-left: 3px solid transparent;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.docs-nav a[href="#demos"]:hover {
  background: #ffa500;
  color: #000 !important;
  transform: translateX(4px);
  border-left-color: #000;
}

.docs-nav a[href="#demos"].active {
  background: #e67e00;
  color: #000 !important;
  border-left-color: #000;
  border-left-width: 3px;
}

.docs-nav a.section-title {
  color: var(--text-secondary);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 16px 20px 4px;
  cursor: default;
  border-left: none;
}

.docs-nav a.section-title:hover { background: none; color: var(--text-secondary); }

.docs-content {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px 32px;
  padding-bottom: calc(24px + 56px + env(safe-area-inset-bottom));
  line-height: 1.7;
}

.docs-content h1 {
  font-size: 28px;
  color: var(--accent);
  margin-bottom: 16px;
}

.docs-content h2 {
  font-size: 20px;
  color: var(--text-primary);
  margin: 28px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.docs-content h3 {
  font-size: 16px;
  color: var(--success);
  margin: 20px 0 8px;
}

.docs-content p {
  margin-bottom: 12px;
  color: #ccd;
}

.docs-content ul, .docs-content ol {
  margin: 8px 0 16px 24px;
  color: #ccd;
}

.docs-content li { margin-bottom: 4px; }

.docs-content code {
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: 3px;
  font-family: 'Cascadia Code', 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--warning);
}

.docs-content pre {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  margin: 12px 0 20px;
  overflow-x: auto;
}

.docs-content pre code {
  background: none;
  padding: 0;
  color: var(--success);
  line-height: 1.5;
}

.apk-download-card {
  text-align: center;
  padding: 36px 20px;
  background: linear-gradient(135deg, #1a1a2e, #3a2050);
  border-radius: 16px;
  margin-bottom: 24px;
  border: 2px solid var(--accent);
  max-width: 100%;
  box-sizing: border-box;
}

.apk-download-btn {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 14px;
  padding: 14px 28px;
  background: #0f0f23;
  border: 2px solid #e94560;
  border-radius: 12px;
  text-decoration: none;
  color: white;
  transition: transform 0.15s;
  width: auto;
  max-width: 100%;
  box-sizing: border-box;
}

.apk-download-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #e94560, #c23152);
  flex-shrink: 0;
}

.apk-download-text { text-align: left; min-width: 0; }
.apk-download-label { display: block; font-size: 12px; opacity: 0.75; }
.apk-download-name {
  display: block;
  font-size: 19px;
  font-weight: bold;
  line-height: 1.3;
  white-space: nowrap;
}

@media (max-width: 480px) {
  .apk-download-card { padding: 24px 14px; }
  .apk-download-btn { gap: 10px; padding: 12px 16px; }
  .apk-download-icon { width: 34px; height: 34px; }
  .apk-download-name { font-size: 15px; }
  .apk-download-label { font-size: 11px; }
}

.docs-content .note {
  background: var(--bg-tertiary);
  border-left: 3px solid var(--accent);
  padding: 12px 16px;
  margin: 12px 0;
  border-radius: 0 6px 6px 0;
  color: var(--text-secondary);
  font-size: 13px;
}

.docs-search {
  padding: 6px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 4px;
  font-size: 13px;
  width: 200px;
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* DEMO CARDS (Retro Games section) */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.demo-card {
  background: linear-gradient(145deg, #234435, #1a3a2e);
  border: 2px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: default;
}

.demo-card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: var(--accent);
  box-shadow: 0 12px 32px rgba(106, 175, 106, 0.25);
}

.demo-card-content {
  padding: 20px;
  text-align: center;
}

.demo-card-emoji {
  font-size: 44px;
  margin-bottom: 10px;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
  transition: transform 0.3s;
}

.demo-card:hover .demo-card-emoji {
  transform: scale(1.2) rotate(-8deg);
}

.demo-card h3 {
  font-size: 20px;
  color: var(--accent);
  margin: 0 0 8px;
  border: none;
  padding: 0;
}

.demo-card p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.5;
}

.demo-play-btn {
  display: inline-block;
  padding: 12px 28px;
  background: linear-gradient(135deg, #6aaf6a, #4ecdc4);
  color: #0a0a1a;
  border: none;
  border-radius: 50px;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 14px rgba(106, 175, 106, 0.35);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.demo-play-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 20px rgba(106, 175, 106, 0.5);
  background: linear-gradient(135deg, #7ec87e, #5dd8d0);
}

.demo-play-btn:active {
  transform: scale(0.95);
}

/* DOCS SUBTABS */
.docs-subtabs {
  display: flex;
  gap: 0;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 0 8px;
}

.docs-subtab {
  padding: 10px 16px;
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 13px;
  transition: all 0.15s;
}

.docs-subtab:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.docs-subtab.active { color: var(--accent); border-bottom-color: var(--accent); }

.docs-subtab-content { display: none; flex-direction: column; flex: 1; min-height: 0; }
.docs-subtab-content.active { display: flex; }

/* SOURCES PANEL */
.sources-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
}

.sources-list {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px;
  padding-bottom: calc(16px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.source-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
}

.source-item:hover { border-color: var(--accent); background: var(--bg-tertiary); }

.source-item .source-icon {
  font-size: 20px;
  width: 32px;
  text-align: center;
}

.source-item .source-info { flex: 1; }

.source-item .source-name {
  font-family: monospace;
  font-size: 14px;
  color: var(--text-primary);
  font-weight: 600;
}

.source-item .source-meta {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.source-item .source-actions {
  display: flex;
  gap: 4px;
}

.source-item .source-actions button {
  padding: 4px 8px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 12px;
}

.source-item .source-actions button:hover { background: var(--accent); }


.source-name-input {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 13px;
  width: 120px;
}

#saveSourceBtn, #newSourceBtn {
  padding: 4px 10px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
}

#saveSourceBtn:hover, #newSourceBtn:hover { background: var(--accent); }

#refreshSourcesBtn {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
}

#refreshSourcesBtn:hover { background: var(--accent); }

#saveProjectBtn, #exportHtmlBtn, #refreshProjectsBtn {
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 4px;
  cursor: pointer;
  font-size: 13px;
}

#saveProjectBtn:hover, #exportHtmlBtn:hover, #refreshProjectsBtn:hover { background: var(--accent); }

.empty-sources {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
}

.empty-sources .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-sources p { font-size: 14px; }

/* ─── SIDEBAR TOGGLE (mobile) ─── */
.sidebar-toggle {
  display: none;
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 110;
  width: 40px;
  height: 40px;
  padding: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 22px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
  touch-action: manipulation;
}

.sidebar-toggle:hover { background: var(--bg-tertiary); }

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 90;
}

/* ─── MOBILE DOCS SELECT ─── */
.docs-nav-select {
  display: none;
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 4px;
  font-size: 13px;
  font-family: inherit;
}

/* ─── RESPONSIVE: ≤900px (tablet landscape) ─── */
@media (max-width: 900px) {
  #sidebar { width: auto; min-width: 56px; max-width: 180px; }
  .sidebar-header h1, .sidebar-header .subtitle { display: none; }
  .sidebar-tabs { padding: 4px; }
  .tab-btn { justify-content: flex-start; padding: 10px 12px; gap: 8px; }
  .tab-label { font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

  .editor-header { flex-wrap: wrap; gap: 6px; }
  .editor-header h2 { font-size: 14px; }

  .sprite-controls { flex-wrap: wrap; }
  .sprite-controls input { width: 100px; }

  .code-controls { flex-wrap: wrap; }
  .code-controls .file-name { display: none; }
  .code-controls #formatBtn { display: none; }
  .source-name-input { width: 90px; font-size: 12px; }

  .docs-nav { display: none; }
  .docs-nav-select { display: block; margin: 8px 12px; }
  .docs-content { padding: 16px 20px; padding-bottom: calc(16px + 56px + env(safe-area-inset-bottom)); }
  .docs-content h1 { font-size: 24px; }

  .editor-right:not(.force-show) { display: none; }
  .code-sidebar { display: none; }
  .scene-output { display: none; }

  .canvas-wrapper { max-width: 100%; overflow: hidden; }
  #pixelCanvas { max-width: 100%; height: auto; }
  #sceneCanvas { max-width: 100%; height: auto; }

  .sources-list { padding: 12px; }
  .source-item { padding: 10px 12px; gap: 8px; }
  .source-item .source-name { font-size: 13px; }
}

/* ─── RESPONSIVE: ≤768px (tablet portrait) ─── */
@media (max-width: 768px) {
  .pixel-editor-body { flex-direction: column; }
  .pixel-editor-body .editor-right {
    display: block;
    width: 100%;
    min-width: 0;
    border-left: none;
    border-top: 1px solid var(--border);
    padding: 12px;
    max-height: 160px;
    overflow-y: auto;
  }
  .pixel-editor-body .editor-left { padding: 8px; }

  .scene-body { flex-direction: column; }
  .scene-output {
    display: flex;
    width: 100%;
    min-width: 0;
    border-left: none;
    border-top: 1px solid var(--border);
    max-height: 160px;
  }
  .scene-canvas-wrapper {
    padding: 8px;
    padding-bottom: 130px;
  }
  #sceneCanvas {
    max-width: 100%;
    height: auto;
    image-rendering: pixelated;
  }
  .scene-touch-controls.active { display: flex; }

  .scene-fullscreen-btn { top: 8px; right: 8px; width: 32px; height: 32px; }

  .docs-body { flex-direction: column; }
  .docs-nav {
    display: block;
    width: 100%;
    min-width: 0;
    border-right: none;
    border-bottom: 1px solid var(--border);
    max-height: 180px;
    overflow-y: auto;
    padding: 8px 0;
  }
  .docs-nav a { padding: 6px 16px; font-size: 12px; }
  .docs-nav-select { display: none; }

  .docs-subtabs { flex-wrap: wrap; }

  .toolbar { gap: 4px; }
  .tool-btn { padding: 6px 8px; font-size: 14px; }

  .sources-list { padding: 8px; gap: 6px; }
  .source-item .source-icon { font-size: 16px; width: 24px; }

  #saveSourceBtn, #newSourceBtn { padding: 4px 8px; font-size: 12px; }
  .source-name-input { width: 80px; }
}

/* ─── RESPONSIVE: ≤480px (mobile) ─── */
@media (max-width: 480px) {
  #app.sidebar-open #sidebar {
    left: 0;
  }
  #app.sidebar-open .sidebar-overlay {
    display: block;
  }

  #sidebar {
    position: fixed;
    left: -220px;
    top: 0;
    bottom: 0;
    z-index: 100;
    width: 200px;
    min-width: 200px;
    transition: left 0.2s ease;
  }
  .sidebar-toggle { display: flex; align-items: center; justify-content: center; }

  #main-content {
    margin-left: 0;
  }

  .editor-header {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 12px;
    gap: 4px;
  }
  .editor-header h2 {
    text-align: center;
    font-size: 13px;
  }
  .editor-header .sprite-controls,
  .editor-header .code-controls,
  .editor-header .scene-controls {
    justify-content: center;
  }

  .pixel-editor-body .editor-left { padding: 4px; }
  .pixel-editor-body .editor-right { padding: 8px; max-height: 120px; }

  .toolbar { gap: 3px; }
  .tool-btn { padding: 5px 6px; font-size: 12px; }
  .toolbar input[type="color"] { width: 32px; height: 28px; }

  .docs-nav { max-height: 140px; }
  .docs-content { padding: 12px 14px; padding-bottom: calc(12px + 56px + env(safe-area-inset-bottom)); }
  .docs-content h1 { font-size: 20px; }
  .docs-content h2 { font-size: 16px; }
  .docs-content h3 { font-size: 14px; }
  .docs-content pre { padding: 10px; }
  .docs-content code { font-size: 12px; }

  .source-item { flex-wrap: wrap; padding: 8px 10px; }
  .source-item .source-meta { font-size: 10px; }
  .source-item .source-actions { margin-left: auto; }
  .source-item .source-actions button { font-size: 11px; padding: 3px 6px; }

  .scene-output { max-height: 100px; }
  .scene-canvas-wrapper { padding: 4px; padding-bottom: 130px; }

  .sources-list { padding: 4px; gap: 4px; }

  .code-controls .source-name-input { width: 70px; font-size: 11px; }
  #saveSourceBtn, #newSourceBtn { font-size: 11px; padding: 3px 6px; }

  .console-output { font-size: 11px; padding: 4px 8px; }

  .btn-run { padding: 8px; font-size: 12px; }
  .btn-stop { padding: 8px 12px; font-size: 12px; }

  .docs-search { width: 140px; }
}