/* RetroTheme palette from RetroTheme.java */
:root {
  --bg-darkest:  #0e0a1a;
  --bg-dark:     #1a1228;
  --bg-mid:      #2a1e40;
  --fg-text:     #c8d4ff;
  --fg-accent:   #00e5ff;
  --fg-selected: #ff9500;
  --border-hi:   #5a3a90;
  --border-lo:   #060312;
  --grid-line:   #2a1e44;
  --check-a:     #1e1430;
  --check-b:     #2a1e44;
  --danger:      #e94560;
  --frame-w:     10px;
  --frame-color: #5a3a90;
  --preview-w: 260px;
  --grid-glow:    rgba(90,58,144,0.4);
  --preview-glow: rgba(0,229,255,0.12);
}

:root[data-theme="sky"] {          /* Clear Day — light */
  --bg-darkest:#cfe8fb; --bg-dark:#e4f2fd; --bg-mid:#f4faff;
  --fg-text:#1a3a5c; --fg-accent:#0088cc; --fg-selected:#ff8a3d;
  --border-hi:#7fb8e6; --border-lo:#9cc4e4; --grid-line:#bcd8ef;
  --check-a:#eef6fd; --check-b:#dcebf8; --danger:#e23b52;
  --frame-color:#7fb8e6;
  --grid-glow:rgba(0,136,204,0.25); --preview-glow:rgba(0,136,204,0.18);
}

:root[data-theme="industrial"] {   /* Gunmetal — cool dark */
  --bg-darkest:#0f1214; --bg-dark:#191e22; --bg-mid:#262e34;
  --fg-text:#c4ccd2; --fg-accent:#6bb0c9; --fg-selected:#ff4438;
  --border-hi:#3c4750; --border-lo:#060809; --grid-line:#222a30;
  --check-a:#161b1f; --check-b:#1f262b; --danger:#ff4438;
  --frame-color:#3c4750;
  --grid-glow:rgba(107,176,201,0.30); --preview-glow:rgba(107,176,201,0.15);
}

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

html, body {
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none;   /* no pull-to-refresh / bounce while drawing */
  touch-action: manipulation;  /* kill double-tap zoom; canvas overrides to none */
  font-family: 'Courier New', Courier, monospace;
  font-size: 12px;
  color: var(--fg-text);
}

body {
  padding: var(--frame-w);
  background: var(--frame-color);
}

.app {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--bg-darkest);
}

/* ── Topbar ──────────────────────────────────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px;
  height: 44px;
  background: var(--bg-darkest);
  border-bottom: 1px solid var(--border-hi);
  flex-shrink: 0;
}

.logo {
  font-size: 15px;
  font-weight: bold;
  color: var(--fg-accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-right: 8px;
}

.file-menu-wrap {
  position: relative;
}

.file-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  background: var(--bg-darkest);
  border: 1px solid var(--border-hi);
  min-width: 130px;
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.file-dropdown.hidden { display: none; }

.file-dropdown button {
  background: none;
  border: none;
  color: var(--fg-text);
  font-family: inherit;
  font-size: 12px;
  padding: 7px 14px;
  text-align: left;
  cursor: pointer;
}

.file-dropdown button:hover {
  background: var(--bg-mid);
  color: var(--fg-accent);
}

.dropdown-sep {
  border-top: 1px solid var(--border-hi);
  margin: 3px 0;
}

.demo-label {
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--border-hi);
  padding: 4px 14px 2px;
}

.demo-list {
  display: flex;
  flex-direction: column;
  color: var(--border-hi);
  font-size: 11px;
}

.demo-list:empty,
.demo-list:not(:has(button)) { padding: 0 14px 2px; }

.demo-list button { padding-left: 22px; }

.size-opt .check, .theme-opt .check, #brushToggle .check {
  display: inline-block;
  width: 14px;
  color: var(--fg-accent);
  opacity: 0;
}

.size-opt.active .check, .theme-opt.active .check, #brushToggle.active .check { opacity: 1; }

/* ── Mobile triangle brush cursor ────────────────────────────────── */
#brushCursor {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 9999;
  pointer-events: none;
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.5));
}
#brushCursor.hidden { display: none; }

/* Temporary firmness readout for cross-browser tuning */
#brushDebug {
  position: fixed;
  top: 4px;
  left: 4px;
  z-index: 10000;
  padding: 4px 6px;
  background: rgba(0, 0, 0, 0.75);
  color: #0f0;
  font: 11px/1.3 monospace;
  white-space: pre;
  pointer-events: none;
}
#brushDebug.hidden { display: none; }
#brushCursor .tri { transform-box: fill-box; transform-origin: 50% 100%; }
#brushCursor.pulse .tri { animation: brushPulse 220ms ease-out; }
@keyframes brushPulse {
  0%   { transform: scale(1); }
  40%  { transform: scale(1.28); }
  100% { transform: scale(1); }
}

/* ── Buttons ─────────────────────────────────────────────────────── */
.btn {
  background: var(--bg-mid);
  border: 1px solid var(--border-hi);
  color: var(--fg-text);
  font-family: inherit;
  font-size: 12px;
  padding: 4px 10px;
  cursor: pointer;
  transition: background 0.1s, color 0.1s, border-color 0.1s;
  white-space: nowrap;
}

.btn:hover {
  background: var(--border-hi);
  color: var(--fg-accent);
}

.btn.active {
  background: var(--border-hi);
  color: var(--fg-accent);
  border-color: var(--fg-accent);
}

.btn.sm { padding: 2px 7px; font-size: 11px; }

.btn.danger {
  border-color: var(--danger);
  color: var(--danger);
}

.btn.danger:hover {
  background: var(--danger);
  color: var(--bg-darkest);
}

.btn-group {
  display: flex;
  gap: 2px;
}

.btn-group .btn {
  border-radius: 0;
}

/* ── Workspace ───────────────────────────────────────────────────── */
.workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
  min-height: 0;
}

.editor-col,
.preview-col,
.transform-col {
  transition: flex-grow .28s ease, flex-basis .28s ease,
              min-width .28s ease, width .28s ease, opacity .2s ease;
}

/* ── Editor column ───────────────────────────────────────────────── */
.editor-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px;
  gap: 8px;
  overflow-y: auto;
  background: var(--bg-dark);
  border-right: 1px solid var(--border-hi);
  flex: 1 1 0;
  min-width: 260px;
  position: relative;
}

/* ── Frame tabs ──────────────────────────────────────────────────── */
.frame-tabs {
  display: flex;
  gap: 3px;
  align-items: center;
  flex-wrap: wrap;
}

.frame-tab {
  display: flex;
  align-items: center;
  gap: 3px;
  background: var(--bg-mid);
  border: 1px solid var(--border-hi);
  color: var(--fg-text);
  font-family: inherit;
  font-size: 11px;
  padding: 3px 8px;
  cursor: pointer;
}

.frame-tab.active {
  background: var(--border-hi);
  color: var(--fg-accent);
  border-color: var(--fg-accent);
}

.del-frame-btn {
  background: none;
  border: 1px dashed var(--danger);
  color: var(--danger);
  font-family: inherit;
  font-size: 13px;
  padding: 0 8px 2px;
  cursor: pointer;
  line-height: 1;
}

.del-frame-btn:hover {
  background: var(--danger);
  color: #fff;
}

/* ── Delete-frame confirm popup (centered over draw panel) ───────── */
.frame-del-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.55);
  z-index: 200;
}

.frame-del-dialog {
  background: var(--bg-darkest);
  border: 1px solid var(--border-hi);
  box-shadow: 0 0 18px rgba(0, 0, 0, 0.6);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  min-width: 180px;
}

.frame-del-msg {
  color: var(--fg-text);
  font-size: 14px;
}

.frame-del-btns {
  display: flex;
  gap: 16px;
}

.frame-del-yes,
.frame-del-no {
  font-family: inherit;
  font-size: 13px;
  padding: 6px 18px;
  border: none;
  color: #fff;
  cursor: pointer;
}

.frame-del-yes { background: #3ca03c; }
.frame-del-yes:hover { background: #4bbf4b; }
.frame-del-no  { background: #be3232; }
.frame-del-no:hover  { background: #d84343; }

.add-frame-btn {
  background: none;
  border: 1px dashed var(--border-hi);
  color: var(--border-hi);
  font-family: inherit;
  font-size: 15px;
  padding: 0 8px 2px;
  cursor: pointer;
  line-height: 1;
}

.add-frame-btn:hover {
  border-color: var(--fg-accent);
  color: var(--fg-accent);
}

/* ── Frame loop row (below the tabs) ─────────────────────────────── */
.loop-row {
  position: relative;
  height: 22px;
  margin-top: 2px;
}

.loop-btn {
  position: absolute;
  right: 0;
  top: 0;
  transform: translateX(50%);
  background: none;
  border: 1px dashed var(--border-hi);
  color: var(--border-hi);
  font-family: inherit;
  font-size: 14px;
  line-height: 1;
  padding: 1px 6px 3px;
  cursor: pointer;
}

.loop-btn:hover:not(:disabled) {
  border-color: var(--fg-accent);
  color: var(--fg-accent);
}

.loop-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.loopframe-marker {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  background: var(--bg-mid);
  border: 1px solid var(--fg-accent);
  color: var(--fg-accent);
  font-family: inherit;
  font-size: 13px;
  line-height: 1;
  padding: 1px 5px 3px;
  cursor: ew-resize;
  user-select: none;
}

.loopframe-marker.disabled {
  border-color: var(--border-hi);
  color: var(--border-hi);
  opacity: 0.6;
}

.loopframe-marker.parked {
  border-style: dashed;
  border-color: var(--border-hi);
  color: var(--border-hi);
  opacity: 0.4;
}

/* ── Canvas ──────────────────────────────────────────────────────── */
#grid {
  display: block;
  image-rendering: pixelated;
  border: 1px solid var(--border-hi);
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cg transform='translate(1 22) rotate(-45 0 0)'%3E%3Crect x='-3' y='-4' width='6' height='14' fill='%23ffcc00' stroke='%23000' stroke-width='1'/%3E%3Cpolygon points='-3,10 3,10 0,17' fill='%23f4a460' stroke='%23000' stroke-width='1'/%3E%3Cpolygon points='-1.2,15 1.2,15 0,17' fill='%23000'/%3E%3Crect x='-3' y='-6' width='6' height='2' fill='%23ff69b4' stroke='%23000' stroke-width='1'/%3E%3C/g%3E%3C/svg%3E") 1 22, crosshair;
  box-shadow: 0 0 12px var(--grid-glow);
  align-self: center;
}

/* ── Palette area ────────────────────────────────────────────────── */
.palette-area {
  display: flex;
  flex-direction: column;
  gap: 6px;
  align-items: center;
}

.theme-select-row {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--fg-accent);
}

.theme-select-row select {
  background: var(--bg-mid);
  color: var(--fg-text);
  border: 1px solid var(--border-hi);
  font-family: inherit;
  font-size: 11px;
  padding: 2px 4px;
  cursor: pointer;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, 34px);
  gap: 5px;
}

/* Auto/Manual brush-mode buttons flanking the palette (shown only in brush mode) */
.palette-flank {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 8px;
}
.brush-mode-btn {
  display: none;
  width: 72px;
  border: 2px solid var(--border-hi);
  border-radius: 4px;
  background: var(--bg-mid);
  color: var(--fg-text);
  font-family: inherit;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
}
.palette-flank.modes-on .brush-mode-btn { display: block; }
.brush-mode-btn.active {
  background: var(--fg-selected);
  border-color: var(--fg-selected);
  color: var(--bg-darkest);
}

.swatch {
  width: 34px;
  height: 34px;
  border: 2px solid var(--border-hi);
  cursor: pointer;
  position: relative;
  transition: border-color 0.1s;
}

.swatch.active {
  border-color: var(--fg-accent);
  box-shadow: 0 0 6px var(--fg-accent);
}

.swatch.base { border-style: double; border-width: 4px; }

.swatch-eraser {
  grid-column: 1 / -1;
  height: 26px;
  background: repeating-conic-gradient(var(--check-a) 0% 25%, var(--check-b) 0% 50%) 0 0 / 10px 10px;
  border: 2px solid var(--border-hi);
  color: var(--fg-text);
  font-family: inherit;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
  text-shadow: 0 0 3px #000;
}

.swatch-eraser.active {
  border-color: var(--fg-accent);
  box-shadow: 0 0 6px var(--fg-accent);
  color: var(--fg-accent);
}

input[type="color"] {
  width: 30px;
  height: 22px;
  border: 1px solid var(--border-hi);
  padding: 1px;
  background: var(--bg-mid);
  cursor: pointer;
}

/* ── History area ────────────────────────────────────────────────── */
.history-area {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-items: center;
  width: 100%;
}

.history-title {
  font-size: 11px;
  color: var(--fg-accent);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.history-grid {
  display: flex;
  flex-direction: row;
  justify-content: flex-start;
  gap: 6px;
  min-height: 40px;
  width: 100%;
}

.history-thumb {
  padding: 2px;
  background: var(--bg-mid);
  border: 1px solid var(--border-hi);
  cursor: pointer;
  line-height: 0;
  transition: border-color 0.1s, box-shadow 0.1s, transform 0.15s ease;
}

.history-thumb:hover {
  border-color: var(--fg-accent);
  box-shadow: 0 0 6px var(--fg-accent);
}

.history-thumb canvas {
  display: block;
  image-rendering: pixelated;
}

/* ── Transform column ────────────────────────────────────────────── */
.transform-col {
  display: flex;
  flex-direction: column;
  flex: 1 1 0;
  min-width: 260px;
  overflow: hidden;
  background: var(--bg-darkest);
}

.transform-head {
  padding: 8px 14px;
  border-bottom: 1px solid var(--border-hi);
  flex-shrink: 0;
}

.transform-panel {
  flex: 1;
  overflow-y: auto;
  padding: 10px 14px;
}

.transform-col h3 {
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--border-hi);
  margin-bottom: 8px;
}

.effect-tabs {
  display: flex;
  gap: 3px;
  margin-bottom: 10px;
}

.effect-tabs .btn {
  flex: 1;
  text-align: center;
  padding: 4px 6px;
  font-size: 11px;
}

/* ── Slider rows ─────────────────────────────────────────────────── */
.slider-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 5px;
  min-height: 22px;
}

.slider-row label,
.toggle-row label {
  min-width: 110px;
  font-size: 11px;
  color: var(--fg-text);
  flex-shrink: 0;
}

.slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--fg-accent);
  min-width: 60px;
}

.slider-val {
  min-width: 36px;
  text-align: right;
  font-size: 11px;
  color: var(--fg-accent);
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 5px;
}

.toggle-row input[type="checkbox"] {
  accent-color: var(--fg-accent);
  cursor: pointer;
}

.divider {
  border: none;
  border-top: 1px solid var(--border-hi);
  margin: 10px 0;
}

.section-title {
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--border-hi);
  margin-bottom: 6px;
}

/* ── Preview column ──────────────────────────────────────────────── */
.preview-col {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 10px;
  gap: 8px;
  background: var(--bg-darkest);
  border-left: 1px solid var(--border-hi);
  border-right: 1px solid var(--border-hi);
  flex: 0 0 auto;
  width: var(--preview-w);
}

.preview-resize {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 10px;
  cursor: ew-resize;
  z-index: 5;
  background: var(--fg-accent);
  opacity: 0.12;
}

.preview-resize.left  { left: 0; }
.preview-resize.right { right: 0; }
.preview-resize:hover,
.preview-resize:active { opacity: 0.4; }

.panel-title {
  font-size: 10px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--border-hi);
  align-self: flex-start;
}

.preview-canvas-wrap {
  position: relative;
}

#preview {
  display: block;
  image-rendering: pixelated;
  border: 1px solid var(--border-hi);
  box-shadow: 0 0 10px var(--preview-glow);
}

.preview-frame-label {
  position: absolute;
  bottom: 4px;
  right: 5px;
  font-size: 10px;
  color: var(--fg-accent);
  opacity: 0.7;
  pointer-events: none;
}

.preview-controls {
  display: flex;
  gap: 6px;
}

.preview-btn {
  font-size: 14px;
  padding: 4px 12px;
  min-width: 42px;
  text-align: center;
}

.preview-btn.playing {
  border-color: var(--fg-accent);
  color: var(--fg-accent);
}

/* ── Responsive: bottom tabs + collapsed layout ──────────────────── */
.mode-tabs { display: none; }

.mode-tab {
  flex: 1;
  padding: 10px;
  background: var(--bg-dark);
  border: none;
  border-top: 1px solid var(--border-hi);
  color: var(--fg-text);
  font: inherit;
  letter-spacing: 1px;
  text-transform: uppercase;
  cursor: pointer;
}

.mode-tab.active {
  color: var(--fg-accent);
  background: var(--bg-mid);
}

.app.collapsed .mode-tabs { display: flex; }

/* one view at a time: stack panels vertically */
.app.collapsed .workspace { flex-direction: column; }

.app.collapsed .editor-col,
.app.collapsed .preview-col,
.app.collapsed .transform-col { width: auto; min-width: 0; }

/* the desktop-only side resize handles are irrelevant when stacked */
.app.collapsed .preview-resize { display: none; }

/* DRAW view: only the editor */
.app.collapsed.mode-draw .preview-col,
.app.collapsed.mode-draw .transform-col { display: none; }
.app.collapsed.mode-draw .editor-col { flex: 1 1 auto; }

/* PREVIEW + TRANSFORM view: editor hidden, preview on top, transform below */
.app.collapsed.mode-transform .editor-col { display: none; }
.app.collapsed.mode-transform .preview-col { flex: 0 0 auto; border: 0; }
.app.collapsed.mode-transform .transform-col { flex: 1 1 auto; overflow-y: auto; }

/* draw canvas scales down to fit the narrow column */
.app.collapsed #grid { max-width: 100%; height: auto; }

/* ── Scrollbar ───────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-darkest); }
::-webkit-scrollbar-thumb { background: var(--bg-mid); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hi); }