:root {
  --bg: #16171a;
  --panel: #1e1f23;
  --panel-2: #26272c;
  --field: #2c2e34;
  --field-hover: #34363d;
  --border: #33353b;
  --text: #e6e6e8;
  --dim: #9a9ca4;
  --accent: #f0a63a;
  --accent-ink: #1a1306;
  --danger: #e2584f;
  --sel: rgba(240, 166, 58, 0.16);
  --viewport: #101113;
  --radius: 6px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 12px/1.35 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
}

button, select, input { font: inherit; color: inherit; }
button {
  background: var(--field);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 4px 9px;
  height: 26px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover:not(:disabled) { background: var(--field-hover); }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: 0.4; cursor: default; }
button.icon { width: 26px; padding: 0; font-size: 14px; line-height: 1; }
button.icon svg { display: block; margin: auto; }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
button.primary:hover:not(:disabled) { background: #f6b85c; }
button.danger:hover:not(:disabled) { background: var(--danger); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }

select, input[type="number"], input[type="text"], input:not([type]) {
  background: var(--field);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  height: 26px;
  padding: 0 6px;
  min-width: 0;
}
select { padding-right: 2px; cursor: pointer; }
input[type="number"] { -moz-appearance: textfield; }
input::-webkit-outer-spin-button, input::-webkit-inner-spin-button { opacity: 0.5; }
input[type="checkbox"] { accent-color: var(--accent); margin: 0; width: 14px; height: 14px; cursor: pointer; }

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 650; font-size: 13px; margin-right: 4px; }
.logo {
  width: 18px; height: 18px; border-radius: 5px;
  background: radial-gradient(closest-side, #fff 35%, #000 100%);
  box-shadow: 0 0 0 1px var(--border);
}
.group { display: flex; align-items: center; gap: 4px; }
.spacer { flex: 1; }
.seg { gap: 0; }
.seg button { border-radius: 0; margin-left: -1px; }
.seg button:first-child { border-radius: var(--radius) 0 0 var(--radius); margin-left: 0; }
.seg button:last-child { border-radius: 0 var(--radius) var(--radius) 0; }
.seg button.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); position: relative; }
#presetSelect { width: 190px; }
#fileName { width: 110px; }
#format { width: 150px; }

/* ---------- layout ---------- */
main { flex: 1; display: flex; min-height: 0; }
.panel {
  background: var(--panel);
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
}
.panel.left { width: 250px; border-right: 1px solid var(--border); display: flex; flex-direction: column; }
.panel.right { width: 300px; border-left: 1px solid var(--border); padding-bottom: 12px; }
.panel section { padding: 8px 10px 10px; border-bottom: 1px solid var(--border); }
.panel section.grow { flex: 1; display: flex; flex-direction: column; min-height: 160px; border-bottom: 0; }
h3 {
  margin: 0 0 7px;
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--dim);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}
.panel.right h3 { padding: 10px 10px 0; }
.hint { text-transform: none; letter-spacing: 0; font-weight: 400; font-size: 11px; opacity: 0.8; }
.row { display: flex; gap: 4px; align-items: center; margin-bottom: 6px; }
.row > select { flex: 1; }
.row.size input { width: 68px; text-align: right; }
.row.size span { color: var(--dim); }

/* ---------- controls ---------- */
.ctrl {
  display: grid;
  grid-template-columns: 84px 1fr 74px;
  align-items: center;
  gap: 6px;
  min-height: 26px;
  padding: 1px 10px;
}
#docControls .ctrl { padding: 1px 0; grid-template-columns: 70px 1fr 64px; }
.ctrl > label {
  color: var(--dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: default;
}
.ctrl > label[title]:hover { color: var(--text); }
.ctrl.wide { grid-template-columns: 84px 1fr; }
#docControls .ctrl.wide { grid-template-columns: 74px 1fr; }
.ctrl .num { position: relative; }
.ctrl .num input { width: 100%; text-align: right; padding: 0 20px 0 4px; height: 22px; }
.ctrl .num .unit { position: absolute; right: 5px; top: 50%; transform: translateY(-50%); color: var(--dim); pointer-events: none; font-size: 10px; }
.ctrl select { height: 24px; width: 100%; }
.ctrl.check { grid-template-columns: 84px 1fr; }
.checks { display: flex; gap: 14px; padding: 4px 0 2px; }
.checks label { display: flex; align-items: center; gap: 6px; cursor: pointer; color: var(--dim); }
.checks label:hover { color: var(--text); }
.sep { height: 1px; background: var(--border); margin: 6px 10px; }
.name-input { width: calc(100% - 20px); margin: 0 10px 6px; }

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 18px;
  background: transparent;
  margin: 0;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-runnable-track {
  height: 4px; border-radius: 2px;
  background: linear-gradient(to right, var(--accent) var(--p, 0%), #3c3f46 var(--p, 0%));
}
input[type="range"]::-moz-range-track { height: 4px; border-radius: 2px; background: #3c3f46; }
input[type="range"]::-moz-range-progress { height: 4px; border-radius: 2px; background: var(--accent); }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px; height: 13px; margin-top: -4.5px;
  border-radius: 50%;
  background: #f2f2f4;
  border: 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}
input[type="range"]::-moz-range-thumb { width: 13px; height: 13px; border-radius: 50%; background: #f2f2f4; border: 0; }
input[type="range"]:hover::-webkit-slider-thumb { background: #fff; transform: scale(1.12); }

/* ---------- add shape ---------- */
.addgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; }
.addgrid button {
  height: auto; padding: 6px 2px 5px;
  display: flex; flex-direction: column; align-items: center; gap: 3px;
  font-size: 11px;
}
.addgrid canvas { width: 40px; height: 24px; border-radius: 3px; background: #000; display: block; }

/* ---------- layers ---------- */
.layers { flex: 1; overflow-y: auto; margin: 0 -10px; padding: 0 6px; min-height: 60px; }
.layer {
  display: flex; align-items: center; gap: 7px;
  padding: 4px 6px;
  border-radius: var(--radius);
  cursor: pointer;
  border: 1px solid transparent;
}
.layer:hover { background: var(--panel-2); }
.layer.sel { background: var(--sel); border-color: rgba(240, 166, 58, 0.45); }
.layer.off .lname, .layer.off canvas { opacity: 0.4; }
.layer canvas { width: 40px; height: 24px; border-radius: 3px; background: #000; flex: none; box-shadow: 0 0 0 1px var(--border); }
.layer .lmeta { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.layer .lname { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.layer .lblend { color: var(--dim); font-size: 10.5px; }
.layer.drop-before { box-shadow: 0 -2px 0 var(--accent); }
.layer.drop-after { box-shadow: 0 2px 0 var(--accent); }
.layers .empty { color: var(--dim); padding: 10px 6px; }
.layer-actions { display: flex; gap: 4px; padding-top: 8px; }

/* ---------- viewport ---------- */
.center { flex: 1; display: flex; flex-direction: column; min-width: 0; }
#viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--viewport);
  cursor: grab;
  outline: none;
  touch-action: none;
}
#viewport.panning { cursor: grabbing; }
#viewport.move { cursor: move; }
#viewport.handle { cursor: pointer; }
#stage {
  position: absolute; left: 0; top: 0;
  transform-origin: 0 0;
  box-shadow: 0 0 0 1px #3a3c42, 0 8px 40px rgba(0, 0, 0, 0.6);
  will-change: transform;
}
#display { width: 100%; height: 100%; display: block; }
#display.pixelated { image-rendering: pixelated; }
/* A canvas is a replaced element: inset alone won't stretch it, so size it explicitly. */
#overlay { position: absolute; left: 0; top: 0; width: 100%; height: 100%; pointer-events: none; }
#dropHint {
  position: absolute; inset: 12px;
  border: 2px dashed var(--accent);
  border-radius: 12px;
  display: none; align-items: center; justify-content: center;
  font-size: 16px; color: var(--accent);
  background: rgba(16, 17, 19, 0.75);
  pointer-events: none;
}
#viewport.dragover #dropHint { display: flex; }

.statusbar {
  display: flex; align-items: center; gap: 12px;
  height: 34px; padding: 0 8px;
  background: var(--panel);
  border-top: 1px solid var(--border);
  white-space: nowrap;
  overflow: hidden;
}
.statusbar button, .statusbar select { height: 24px; }
.statusbar button.icon { width: 24px; }
#zoomSel { width: 72px; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; font-size: 11px; }
.dim { color: var(--dim); }
#readout { min-width: 210px; }

#props .empty { color: var(--dim); padding: 10px; }

#toast {
  position: fixed; left: 50%; bottom: 48px;
  transform: translateX(-50%) translateY(10px);
  background: #2d2f35; border: 1px solid var(--border);
  padding: 7px 14px; border-radius: 8px;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
  opacity: 0; pointer-events: none;
  transition: opacity 0.15s, transform 0.15s;
  z-index: 10;
}
#toast.show { opacity: 1; transform: translateX(-50%); }
#toast.err { border-color: var(--danger); }

@media (max-width: 1180px) {
  .hints { display: none; }
  .panel.right { width: 270px; }
  .panel.left { width: 230px; }
}
/* Phones / narrow windows: one scrolling column, canvas pinned at the top, panels below. */
@media (max-width: 860px) {
  html, body { height: auto; }
  body { overflow: visible; min-height: 100%; }
  .topbar { gap: 6px; padding: 6px 8px; }
  .topbar .spacer { display: none; }
  .history { order: 0; margin-left: auto; }
  .presets { order: 1; flex: 1 1 100%; min-width: 0; }
  #presetSelect { flex: 1 1 0; width: auto; }
  #viewModes { order: 2; flex: 1; min-width: 0; }
  #viewModes button { flex: 1; padding: 4px 2px; }
  #loadImage { order: 2; }
  .export { order: 3; flex: 1 1 100%; min-width: 0; }
  #fileName { flex: 2 1 0; width: auto; }
  #format { flex: 3 1 0; width: auto; }

  main { flex: none; flex-direction: column; }
  .center {
    order: -1;
    position: sticky; top: 0; z-index: 5;
    flex: none;
    height: 46vh; height: 46svh; min-height: 220px;
    border-bottom: 1px solid var(--border);
  }
  .panel { overflow: visible; }
  .panel.left, .panel.right { width: 100%; border: 0; }
  .panel.right { border-bottom: 1px solid var(--border); }
  .panel section.grow { min-height: 0; }
  .layers { overflow: visible; }
  #readout { display: none; }
  #renderInfo { overflow: hidden; text-overflow: ellipsis; min-width: 0; }
}

/* Touch: finger-sized targets; 16px text in fields stops iOS zooming in on focus. */
@media (pointer: coarse) {
  button, select, input[type="number"], input[type="text"], input:not([type]) { height: 36px; }
  button.icon { width: 36px; }
  select, input[type="number"], input[type="text"], input:not([type]) { font-size: 16px; }
  input[type="checkbox"] { width: 20px; height: 20px; }
  .ctrl, .ctrl.wide, .ctrl.check { min-height: 40px; grid-template-columns: 84px 1fr 88px; }
  .ctrl.wide, .ctrl.check { grid-template-columns: 84px 1fr; }
  #docControls .ctrl { grid-template-columns: 70px 1fr 88px; }
  .ctrl .num input, .ctrl select { height: 34px; }
  .checks { gap: 20px; padding: 8px 0 6px; }
  .checks label { gap: 8px; }
  input[type="range"] { height: 34px; }
  input[type="range"]::-webkit-slider-thumb { width: 22px; height: 22px; margin-top: -9px; }
  input[type="range"]::-moz-range-thumb { width: 22px; height: 22px; }
  .row.size input { width: 84px; }
  .layer { padding: 7px 6px; }
  .layer canvas { width: 50px; height: 30px; }
  .statusbar { height: 46px; }
  .statusbar button, .statusbar select { height: 34px; }
  .statusbar button.icon { width: 34px; }
  #zoomSel { width: 84px; }
}