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

.toolbar {
  position: fixed;
  left: 50%;
  bottom: max(20px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 6px;
  max-width: calc(100vw - 24px);
  padding: 8px;
  border-radius: 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(16px) saturate(1.6);
  -webkit-backdrop-filter: blur(16px) saturate(1.6);
  box-shadow: var(--shadow-lg);
  overflow-x: auto;
  scrollbar-width: none;
  z-index: 10;
}

.group {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.divider {
  width: 1px;
  height: 24px;
  margin: 0 4px;
  background: var(--border);
  flex-shrink: 0;
}

.btn {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 12px;
  background: transparent;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, transform 0.15s var(--ease);
}
.btn:hover { background: var(--hover); }
.btn:active { transform: scale(0.92); }
.btn:focus-visible, .swatch:focus-visible, input:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}
.btn[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-text);
}
.btn.danger:hover { color: var(--danger); }

.swatches { gap: 6px; padding: 0 4px; }

.swatch {
  --c: #000;
  position: relative;
  width: 26px;
  height: 26px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: var(--c);
  box-shadow: inset 0 0 0 1px rgb(0 0 0 / 0.12);
  cursor: pointer;
  transition: transform 0.2s var(--ease);
}
.swatch:hover { transform: scale(1.12); }
.swatch[aria-checked="true"] {
  box-shadow: 0 0 0 2px var(--surface-solid), 0 0 0 4px var(--c);
  transform: scale(1.05);
}

.swatch.custom {
  background: conic-gradient(from 90deg, #ef4444, #eab308, #22c55e, #06b6d4, #3b82f6, #a855f7, #ec4899, #ef4444);
}
.swatch.custom::after {
  content: "";
  position: absolute;
  inset: 7px;
  border-radius: 50%;
  background: var(--c);
  box-shadow: 0 0 0 2px #fff;
}
.swatch.custom input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.size { gap: 10px; padding: 0 6px; }

/* ---- brush menu --------------------------------------------------------- */

.brush-menu {
  position: fixed;
  z-index: 11;
  width: 260px;
  display: grid;
  gap: 10px;
  padding: 10px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(16px) saturate(1.6);
  -webkit-backdrop-filter: blur(16px) saturate(1.6);
  box-shadow: var(--shadow-lg);
}
.brush-menu[hidden] { display: none; }
.brush-menu.tool-panel { width: 240px; }
.download-list { display: grid; gap: 4px; }
.tool-settings { display: grid; gap: 10px; }

.brush-list { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.brush-item {
  padding: 8px 10px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s;
}
.brush-item:hover { background: var(--hover); }
.brush-item[aria-pressed="true"] { background: var(--accent); color: var(--accent-text); }
.brush-list[data-list="own"] { max-height: 168px; overflow-y: auto; }
.brush-list:empty { display: none; }

.brush-heading {
  margin: 2px 0 -4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}
.brush-empty { margin: 0; color: var(--muted); font-size: 12.5px; line-height: 1.4; }
.brush-empty[hidden] { display: none; }

.brush-actions { display: flex; flex-wrap: wrap; gap: 4px; }
.brush-actions button {
  flex: 1 1 auto;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  font-size: 12.5px;
  cursor: pointer;
  transition: background 0.15s;
}
.brush-actions button:hover:not(:disabled) { background: var(--hover); }
.brush-actions button:disabled { opacity: 0.4; cursor: default; }
.brush-actions button.danger:hover:not(:disabled) { color: var(--danger); }

.setting {
  display: grid;
  grid-template-columns: 70px 1fr auto;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}
.setting input[type="range"] { width: 100%; }
:is(.setting, .editor-field) input[type="number"] {
  width: 48px;
  height: 28px;
  padding: 0 4px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  text-align: center;
  -moz-appearance: textfield;
  appearance: textfield;
}
:is(.setting, .editor-field) input[type="number"]::-webkit-inner-spin-button,
:is(.setting, .editor-field) input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; margin: 0; }

.size-preview {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
}
.size-preview span {
  display: block;
  border-radius: 50%;
  background: var(--text);
  transition: width 0.1s, height 0.1s;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 110px;
  height: 4px;
  border-radius: 999px;
  background: linear-gradient(to right, var(--text) var(--fill, 10%), var(--border) var(--fill, 10%));
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--surface-solid);
  border: 0;
  box-shadow: 0 0 0 1px var(--border), 0 2px 6px rgb(0 0 0 / 0.2);
  transition: transform 0.15s var(--ease);
}
input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--surface-solid);
  border: 0;
  box-shadow: 0 0 0 1px var(--border), 0 2px 6px rgb(0 0 0 / 0.2);
}
input[type="range"]:active::-webkit-slider-thumb { transform: scale(1.15); }


@media (max-width: 640px) {
  .toolbar { bottom: max(12px, env(safe-area-inset-bottom)); }
  input[type="range"] { width: 80px; }
  .setting input[type="range"] { width: 100%; }
}