/*
 * Four-quadrant primitive comparison (static/js/quad.js).
 *
 * Colours, radius and widths are the shared tokens from index.css, and the buttons, tags, handle
 * and dividers follow the comparison player in compare.css. The stage takes the aspect ratio of
 * the current scene from --quad-aspect; quad.js moves the crosshair through --quad-x and
 * --quad-y, which clip the four stacked layers into quadrants. The caption, the tip and the
 * "coming soon" card reuse .hx-caption, .hx-tip and .hx-soon-card from index.css.
 */

.quad {
  --quad-max-height: max(calc(100vh - 11rem), 300px);
  width: 100%;
  max-width: var(--hx-wide);
  margin: 0 auto;
  color: var(--hx-ink);
}

/* Method toggle and scene buttons -------------------------------------------------------------- */

.quad .quad-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
}

.quad .quad-scenes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 10px 28px;
}

.quad .quad-scene-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.quad .quad-scene-dataset {
  margin-right: 4px;
  color: var(--hx-muted);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.quad .quad-scene {
  display: inline-flex;
  align-items: center;
  height: 30px;
  margin: 0;
  padding: 0 12px;
  border: 1px solid var(--hx-line);
  border-radius: 999px;
  background: var(--hx-surface);
  color: var(--hx-ink);
  font: inherit;
  font-size: 0.85rem;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.quad .quad-scene:hover {
  border-color: #b5b5b5;
}

.quad .quad-scene[aria-pressed="true"] {
  border-color: var(--hx-dark);
  background: var(--hx-dark);
  color: #fff;
}

.quad .quad-scene:focus-visible {
  outline: 2px solid var(--hx-select);
  outline-offset: 2px;
}

/* Stage: four stacked layers clipped by the crosshair ------------------------------------------ */

.quad .quad-figure {
  margin: 0;
}

.quad .quad-stage {
  --quad-x: 50%;
  --quad-y: 50%;
  position: relative;
  width: min(100%, calc(var(--quad-max-height) * var(--quad-aspect, 16 / 9)));
  aspect-ratio: var(--quad-aspect, 16 / 9);
  margin: 0 auto;
  overflow: hidden;
  border-radius: var(--hx-radius);
  background: var(--hx-surface-2);
  cursor: crosshair;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.quad .quad-layer {
  position: absolute;
  inset: 0;
  transition: opacity 0.2s;
}

.quad .quad-top-left {
  clip-path: inset(0 calc(100% - var(--quad-x)) calc(100% - var(--quad-y)) 0);
}

.quad .quad-top-right {
  clip-path: inset(0 0 calc(100% - var(--quad-y)) var(--quad-x));
}

.quad .quad-bottom-left {
  clip-path: inset(var(--quad-y) calc(100% - var(--quad-x)) 0 0);
}

.quad .quad-bottom-right {
  clip-path: inset(var(--quad-y) 0 0 var(--quad-x));
}

.quad .quad-image {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  -webkit-user-drag: none;
}

.quad .quad-stage:not(.is-ready) .quad-layer {
  opacity: 0;
}

.quad .quad-stage.is-ready.is-loading .quad-layer {
  opacity: 0.65;
}

/* Corner tags -------------------------------------------------------------------------------- */

.quad .quad-label {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: calc(100% - 20px);
  padding: 3px 9px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
  color: var(--hx-ink);
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  pointer-events: none;
  transition: opacity 0.15s;
}

.quad .quad-label.is-covered {
  opacity: 0;
}

.quad .quad-label-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}

.quad .quad-label-total {
  color: var(--hx-muted);
  font-size: 0.72rem;
  font-weight: 400;
}

.quad .quad-top-left .quad-label {
  top: 10px;
  left: 10px;
}

.quad .quad-top-right .quad-label {
  top: 10px;
  right: 10px;
}

.quad .quad-bottom-left .quad-label {
  bottom: 10px;
  left: 10px;
}

.quad .quad-bottom-right .quad-label {
  right: 10px;
  bottom: 10px;
}

.quad .quad-dot {
  flex: none;
  width: 9px;
  height: 9px;
  border-radius: 50%;
}

.quad .quad-dot-3dgs {
  background: var(--hx-method-3dgs, #8b679a);
}

.quad .quad-dot-2dgs {
  background: var(--hx-method-2dgs, #458da5);
}

.quad .quad-dot-ours {
  background: var(--hx-method-ours, #cd7353);
}

/* Crosshair ---------------------------------------------------------------------------------- */

.quad .quad-line {
  position: absolute;
  background: #fff;
  box-shadow: 0 0 3px rgba(0, 0, 0, 0.45);
  pointer-events: none;
}

.quad .quad-line-vertical {
  top: 0;
  bottom: 0;
  left: var(--quad-x);
  width: 2px;
  margin-left: -1px;
}

.quad .quad-line-horizontal {
  left: 0;
  right: 0;
  top: var(--quad-y);
  height: 2px;
  margin-top: -1px;
}

.quad .quad-handle {
  position: absolute;
  left: var(--quad-x);
  top: var(--quad-y);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #fff;
  color: var(--hx-dark);
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.35);
  transform: translate(-50%, -50%);
  cursor: grab;
  touch-action: none;
  outline: none;
}

/* A transparent ring widens the touch target to 52 px without enlarging the visible handle. */
.quad .quad-handle::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
}

.quad .quad-handle svg {
  width: 20px;
  height: 20px;
}

.quad .quad-handle:focus-visible {
  box-shadow: 0 0 0 3px var(--hx-select), 0 1px 6px rgba(0, 0, 0, 0.35);
}

.quad .quad-stage.is-dragging,
.quad .quad-stage.is-dragging .quad-handle {
  cursor: grabbing;
}

.quad .quad-stage:not(.is-ready) :is(.quad-line, .quad-handle) {
  visibility: hidden;
}

/* Loading and error notice ------------------------------------------------------------------- */

.quad .quad-status {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  max-width: calc(100% - 24px);
  margin: 0;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
  color: var(--hx-muted);
  font-size: 0.85rem;
  text-align: center;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.quad .quad-status:empty {
  display: none;
}

/* Caption ------------------------------------------------------------------------------------ */

.quad .quad-caption-meta {
  display: block;
  margin-top: 2px;
  font-size: 0.85rem;
}

.quad .quad-in-view {
  font-style: italic;
}

/* Small screens ------------------------------------------------------------------------------ */

@media screen and (max-width: 600px) {
  .quad .quad-scenes {
    gap: 6px;
  }

  .quad .quad-scenes .quad-scene-group {
    display: contents;
  }

  .quad .quad-scenes .quad-scene-dataset {
    display: none;
  }

  /* The totals would wrap the count labels over much of the small quadrants; the images' alt text keeps them. */
  .quad .quad-label-total {
    display: none;
  }

  .quad .quad-label {
    align-items: flex-start;
    max-width: calc(50% - 18px);
    white-space: normal;
  }

  .quad .quad-label .quad-dot {
    margin-top: 0.3em;
  }

  .quad .quad-label {
    gap: 5px;
    padding: 2px 7px;
    font-size: 0.75rem;
  }

  .quad .quad-dot {
    width: 7px;
    height: 7px;
  }

  .quad .quad-top-left .quad-label,
  .quad .quad-top-right .quad-label {
    top: 6px;
  }

  .quad .quad-bottom-left .quad-label,
  .quad .quad-bottom-right .quad-label {
    bottom: 6px;
  }

  .quad .quad-top-left .quad-label,
  .quad .quad-bottom-left .quad-label {
    left: 6px;
  }

  .quad .quad-top-right .quad-label,
  .quad .quad-bottom-right .quad-label {
    right: 6px;
  }
}

@media (pointer: coarse) {
  .quad .quad-scene {
    height: 40px;
    padding: 0 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .quad .quad-layer,
  .quad .quad-label,
  .quad .quad-scene {
    transition: none;
  }
}