/* circle packer — the poster and its controls. Scoped to #circle-packer, which
   the script fills. One column until the note is wide enough to set the
   controls beside the poster, the way a sheet sits beside its spec. */

#circle-packer {
  container-type: inline-size;
  margin: var(--page-gutter) 0;
}

/* A container cannot query its own width, so the grid is one level in. */
#circle-packer .cp-layout {
  display: grid;
  gap: var(--page-gutter);
  align-items: start;
}

@container (min-width: 44rem) {
  #circle-packer .cp-layout {
    grid-template-columns: minmax(0, 1fr) 17rem;
  }
}

/* The sheet. Its ratio is the box the run is set in; its width is whatever
   keeps the whole sheet on one screen, so the poster is never read in parts. */
#circle-packer .cp-stage {
  display: grid;
  gap: calc(var(--page-gap) / 2);
  min-width: 0;
}

#circle-packer .cp-poster {
  aspect-ratio: var(--ar, 0.8);
  width: min(100%, max(18rem, calc((100svh - 8rem) * var(--ar, 0.8))));
  background: #fff;
  border: 1px solid #000;
}

#circle-packer canvas {
  display: block;
  width: 100%;
  height: 100%;
}

#circle-packer .cp-stats {
  margin: 0;
  font-size: 0.857em;
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  opacity: 0.6;
}

/* The controls, ruled like the contact form: a field is a label over a line. */
#circle-packer .cp-panel {
  display: grid;
  gap: var(--page-gutter);
  min-width: 0;
}

#circle-packer .cp-field {
  display: grid;
  gap: calc(var(--page-gap) / 2);
  min-width: 0;
}

#circle-packer .cp-field > label,
#circle-packer .cp-label {
  display: flex;
  justify-content: space-between;
  gap: var(--page-gap);
  font-weight: 600;
}

#circle-packer output {
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}

#circle-packer .cp-hint {
  margin: 0;
  font-size: 0.857em;
  line-height: 1.45;
  opacity: 0.6;
}

#circle-packer input[type='text'],
#circle-packer select {
  width: 100%;
  min-width: 0;
  padding: calc(var(--page-gap) / 2) 0;
  border: 0;
  border-bottom: 1px solid #000;
  border-radius: 0;
  background: transparent;
  color: #000;
  font: inherit;
  line-height: var(--line-height);
}

#circle-packer input[type='text']:focus,
#circle-packer select:focus {
  outline: none;
  border-bottom-width: 2px;
}

#circle-packer input[type='range'],
#circle-packer input[type='checkbox'] {
  accent-color: #000;
}

#circle-packer input[type='range'] {
  width: 100%;
  margin: 0;
}

#circle-packer .cp-colors {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--page-gap);
}

#circle-packer input[type='color'] {
  width: 100%;
  height: 2.5rem;
  padding: 2px;
  border: 1px solid #000;
  border-radius: 0;
  background: #fff;
  cursor: pointer;
}

#circle-packer .cp-check {
  display: flex;
  align-items: center;
  gap: calc(var(--page-gap) / 2);
}

#circle-packer .cp-check input {
  width: 1rem;
  height: 1rem;
  margin: 0;
}

#circle-packer .cp-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--page-gap);
}