.fft {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 212px minmax(0, 1fr);
  grid-template-areas: "x tools k" "gallery gallery gallery";
  gap: 12px; padding: 12px; max-width: 1560px; margin: 0 auto;
}
#side-x { grid-area: x; }
#side-k { grid-area: k; }
.tools { grid-area: tools; display: flex; flex-direction: column; gap: 8px; align-self: start; }
.gallery { grid-area: gallery; }

.side { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.side-head { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.side-head h2 { font-size: 15px; margin: 0; flex: 1; white-space: nowrap; }
.side-head .fn { font-family: "Times New Roman", Times, serif; font-style: italic; font-weight: 400; font-size: 16px; }
.side-head select { max-width: 13em; }
.side-head select.zoom { max-width: 7em; }

.canvas-wrap {
  position: relative; width: 100%; max-width: calc(100vh - 210px); min-width: 200px;
  aspect-ratio: 1; margin: 0 auto; background: var(--canvas-bg); border-radius: 6px; overflow: hidden;
}
.canvas-wrap canvas { width: 100%; height: 100%; cursor: crosshair; }
.canvas-wrap canvas.hand { cursor: grab; }
.canvas-wrap canvas.hand.dragging { cursor: grabbing; }
.canvas-wrap.drop { outline: 3px dashed var(--accent); outline-offset: -3px; }

.side-foot { display: grid; gap: 4px; max-width: calc(100vh - 210px); width: 100%; margin: 0 auto; }
.side-foot .slider { grid-template-columns: 5.4em 1fr auto; }
/* The line directly under each picture: a hint saying what the tool does there or, while the
   pointer is over the picture, the value under it (one or the other, in the same space). */
.under { min-height: 20px; line-height: 20px; white-space: nowrap; overflow: hidden; }
.under .hint, .readout { overflow: hidden; text-overflow: ellipsis; }
.readout { color: var(--ink-2); white-space: nowrap; }
.foot-row { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 10px; min-width: 0; }
.foot-row select { flex: 0 0 auto; }

#tool-buttons { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; }
#tool-buttons button { padding: 4px 0; display: flex; flex-direction: column; align-items: center; gap: 1px; font-size: 11px; }
#tool-buttons svg { width: 22px; height: 22px; }
#picker { width: 120px; height: 120px; border-radius: 50%; cursor: crosshair; align-self: center; }
#quick-values { justify-content: center; gap: 4px; }
#quick-values button { min-width: 30px; padding: 2px 6px; font-family: var(--mono); }
.value-fields { display: grid; grid-template-columns: auto minmax(0, 1fr) auto minmax(0, 1fr); gap: 4px 5px; align-items: center; }
.value-fields label { color: var(--ink-2); font-size: 12px; text-align: right; }
.value-fields input[type="number"] { width: 100%; padding: 2px 4px; text-align: right; font-family: var(--mono); font-size: 12px; }
.value-note { text-align: center; margin-top: -4px; }
.tools .slider { grid-template-columns: 3em 1fr 3.4em; }

.gallery-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.gallery-head .spacer { flex: 1; }
.size-box { min-width: 240px; }
.presets { display: flex; flex-wrap: wrap; gap: 6px; }
.presets button {
  display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 3px;
  min-width: 70px; font-size: 11.5px; flex: 0 0 auto;
}
.presets canvas { width: 56px; height: 56px; border-radius: 4px; background: #000; }

.wheel-figure { display: flex; gap: 12px; align-items: center; }
.wheel-figure canvas { width: 132px; height: 132px; border-radius: 50%; flex: 0 0 auto; }

@media (max-width: 900px) {
  .fft { grid-template-columns: minmax(0, 1fr); grid-template-areas: "x" "tools" "k" "gallery"; }
  .canvas-wrap, .side-foot { max-width: 100%; }
  .under { white-space: normal; }   /* a hint may take two lines on a phone */
  .tools { flex-direction: row; flex-wrap: wrap; align-items: flex-start; }
  .tools > * { flex: 1 1 180px; }
}