/* Multiplayer cursors (javascripts/swarm.js), shared by the landing page's contact card and the About page's tool table. Colours come from the page's own tokens: the blog's --ag-* names, or the landing page's shorter ones. */

.swarm {
  --swarm-paper: var(--ag-bg, var(--bg));
  --swarm-mono: var(--ag-font-mono, var(--font-mono));
  --swarm-accent: var(--ag-accent, var(--accent));
  --swarm-accent-ink: var(--ag-accent-ink, var(--accent-ink));
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.swarm-cursor {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
  opacity: 0;
  transition: opacity 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
  will-change: transform;
}

.swarm.is-on .swarm-cursor {
  opacity: 1;
}

/* A cursor on its way out */
.swarm.is-on .swarm-cursor.is-gone {
  opacity: 0;
}

.swarm-cursor svg {
  display: block;
  width: 18px;
  height: 18px;
  overflow: visible;
  filter: drop-shadow(0 2px 3px rgba(0, 0, 0, 0.3));
  transform-origin: var(--hot, 2px) var(--hot, 2px);
  transition: transform 0.12s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.swarm-cursor path {
  fill: var(--c);
  stroke: var(--swarm-paper);
  stroke-width: 1.5;
  stroke-linejoin: round;
}

.swarm-cursor.is-down svg {
  transform: scale(0.82);
}

/* Name tag: the cursor's colour behind page-background text, which reads in both themes */
.swarm-cursor b {
  position: absolute;
  top: 15px;
  left: 13px;
  padding: 3px 6px 4px;
  background: var(--c);
  color: var(--swarm-paper);
  font: 600 10px/1 var(--swarm-mono);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* A live size readout beside a resizing cursor */
.swarm-readout {
  position: absolute;
  bottom: 14px;
  left: 14px;
  padding: 3px 6px 4px;
  border: 1px solid var(--c);
  background: var(--swarm-paper);
  color: var(--c);
  font: 600 10px/1 var(--swarm-mono);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

/* Snap guide: a dashed line where the carried piece is about to land; --y runs down the page, --x runs across */
.swarm-guide {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: opacity 0.2s;
}

.swarm-guide--y {
  bottom: 0;
  border-left: 1px dashed var(--c);
}

.swarm-guide--x {
  right: 0;
  border-top: 1px dashed var(--c);
}

.swarm-guide.is-on {
  opacity: 0.75;
}

/* The piece a cursor is carrying: a dashed selection in that cursor's colour, above the pieces it passes over */
.swarm-picked {
  position: relative;
  z-index: 1;
  outline: 1px dashed var(--pick);
  outline-offset: 5px;
}

/* A detection box a cursor drags out: dashed with a size readout while dragging, then solid with a label, like the hero's bounding boxes. The label sits beside the box; .is-tight hangs it under the box's right end instead. */
.swarm-box {
  position: absolute;
  top: 0;
  left: 0;
  border: 1.5px dashed var(--swarm-accent);
  background: color-mix(in srgb, var(--swarm-accent) 5%, transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.swarm-box.is-on {
  opacity: 1;
}

.swarm-box.is-done {
  border-style: solid;
}

.swarm-box span {
  position: absolute;
  top: 50%;
  left: calc(100% + 8px);
  transform: translateY(-50%);
  padding: 4px 7px;
  background: var(--swarm-accent);
  color: var(--swarm-accent-ink);
  font: 600 10px/1 var(--swarm-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.swarm-box.is-tight span {
  top: 100%;
  right: -1.5px;
  left: auto;
  transform: none;
}