:root {
  --tool-button-size: 54px;
  --header-height: 60px;
  --gap: 2px;
  --color-palette-item: 14px;
  --max-toolbar-width: calc(3 * var(--tool-button-size));
}

body {
  margin: 0;
}

main {
  height: 100vh;
  display: grid;
  grid-template-columns: var(--max-toolbar-width) 1fr auto;
  grid-template-rows: var(--header-height) auto 1fr;
}

#page-header {
  grid-row: 1 / 2;
  grid-column: 1 / 4;
}

#tools-section {
  grid-row: 2 / 3;
  grid-column: 1 / 2;
}

#main-canvas-section {
  grid-row: 2 / 4;
  grid-column: 2 / 3;
}

#colateral-section {
  grid-row: 2 / 4;
  grid-column: 3 / 4;
}

#options-section {
  grid-row: 3 / 4;
  grid-column: 1 / 2;
}

#swatch-list-section {
  grid-row: 3 / 4;
  grid-column: 1 / 2;
  overflow-y: auto;
  scrollbar-width: none;
}

#swatch-list-section>div {
  padding: 14%;
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap);
  overflow: visible;
}

.color-palette-item {
  width: var(--color-palette-item);
  height: var(--color-palette-item);
  position: relative;
  overflow: visible;
}

#main-canvas-section {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.tool-list {
  padding-left: 0;
  list-style-type: none;
  max-width: var(--max-toolbar-width);
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap);
  justify-content: center;
}

.tool-list>li {
  width: var(--tool-button-size);
  height: var(--tool-button-size);
}

.swatch-list {
  padding-left: 0;
  list-style-type: none;
}

#tool-placeholder {
  width: var(--tool-button-size);
  height: var(--tool-button-size);
  visibility: hidden;
}

#mouse-stats {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  font-family: monospace;
  display: inline-block;
  min-width: 12em;
  text-align: center;
}

#popupables {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.palette-tooltip {
  position: fixed;
  left: anchor(left);
  bottom: calc(anchor(top) + 10px);
  width: max-content;
  visibility: hidden;
}