:root {
  --bg: #14161a;
  --bg-soft: #1c1f26;
  --panel: #1a1d23;
  --line: #2c313b;
  --text: #e7eaf0;
  --muted: #949cab;
  --accent: #4c8dff;
  --danger: #ff5f56;
  --radius: 8px;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
}

.app {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100%;
}

/* ---------- toolbar ---------- */

.toolbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 600;
  letter-spacing: .2px;
}

.actions {
  display: flex;
  gap: 8px;
  margin-left: auto;
}

/* ---------- buttons & inputs ---------- */

button {
  font: inherit;
  color: var(--text);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 12px;
  cursor: pointer;
}

button:hover:not(:disabled) { border-color: #47506080; background: #232833; }
button:active:not(:disabled) { transform: translateY(1px); }
button:disabled { opacity: .4; cursor: default; }

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}
button.primary:hover:not(:disabled) { background: #3f7de8; }

button.danger { color: var(--danger); }
button.danger:hover:not(:disabled) { background: #2a1c1e; border-color: var(--danger); }

button.icon {
  font-size: 17px;
  line-height: 1;
  padding: 6px 11px;
}

button.wide { width: 100%; margin-bottom: 8px; }
button.small { padding: 5px 10px; font-size: 12px; }

.chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  margin: 2px 0 4px;
}
input[type="range"]:disabled { opacity: .4; }

input[type="color"] {
  width: 44px;
  height: 30px;
  padding: 2px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  cursor: pointer;
  flex: none;
}

input[type="checkbox"] { accent-color: var(--accent); }

select, textarea {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 8px;
  resize: vertical;
}

select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}

/* ---------- main layout ---------- */

main {
  display: grid;
  grid-template-columns: 1fr 300px;
  min-height: 0;
}

.stage {
  position: relative;
  display: grid;
  place-items: center;
  padding: 20px;
  min-height: 0;
  overflow: hidden;
  background:
    linear-gradient(45deg, #1b1e24 25%, transparent 25%, transparent 75%, #1b1e24 75%),
    linear-gradient(45deg, #1b1e24 25%, #191c21 25%, #191c21 75%, #1b1e24 75%);
  background-size: 24px 24px;
  background-position: 0 0, 12px 12px;
}

.stage.dragover { outline: 2px dashed var(--accent); outline-offset: -10px; }

#canvas {
  border-radius: 4px;
  box-shadow: 0 8px 30px #0009;
  cursor: default;
  touch-action: none;      /* required for pinch gestures */
}

.hint {
  position: absolute;
  bottom: 26px;
  margin: 0;
  padding: 6px 12px;
  color: var(--muted);
  background: #0e1013cc;
  border-radius: 20px;
  pointer-events: none;
}

.hint.hidden { display: none; }

/* ---------- side panel ---------- */

.panel {
  background: var(--panel);
  border-left: 1px solid var(--line);
  padding: 16px;
  overflow-y: auto;
}

.section.hidden { display: none; }

.panel h2 {
  margin: 0 0 14px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--muted);
}

.panel h2.spaced {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.panel label {
  display: block;
  margin: 14px 0 5px;
  font-size: 12px;
  color: var(--muted);
}

.panel label.check {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-top: 8px;
  cursor: pointer;
}

.value { color: var(--text); font-variant-numeric: tabular-nums; }

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

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chips button { padding: 6px 10px; }

.swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.swatches button {
  width: 24px;
  height: 24px;
  padding: 0;
  border-radius: 50%;
}

.stickers {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 5px;
}

.stickers button {
  padding: 4px 0;
  font-size: 18px;
  line-height: 1.2;
  text-align: center;
}

.layer-actions {
  display: flex;
  gap: 6px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.layer-actions button { flex: 1; padding: 7px 4px; }

.tip {
  margin: 16px 0;
  color: var(--muted);
  font-size: 12px;
}

/* ---------- status bar ---------- */

.statusbar {
  display: flex;
  gap: 16px;
  padding: 7px 16px;
  font-size: 12px;
  color: var(--muted);
  background: var(--panel);
  border-top: 1px solid var(--line);
}

.statusbar .keys { margin-left: auto; }

@media (max-width: 820px) {
  main { grid-template-columns: 1fr; grid-template-rows: 1fr auto; }
  .panel { border-left: none; border-top: 1px solid var(--line); max-height: 46vh; }
  .toolbar { flex-wrap: wrap; gap: 10px; }
  .actions { margin-left: 0; width: 100%; }
  .actions button { flex: 1; }
  .statusbar .keys { display: none; }
}