/* Theme split-wipe from omacom/omarchy-site src/theme-transition.css. */
@property --theme-wipe {
  syntax: '<length-percentage>';
  inherits: false;
  initial-value: 0px;
}

::view-transition {
  position: fixed;
  inset: 0;
  overflow: clip;
  pointer-events: none;
  filter: none;
}

::view-transition-group(root) {
  animation: none;
  position: absolute;
  inset: 0;
  overflow: hidden;
}

::view-transition-image-pair(root) {
  animation: none;
  inset: 0;
  overflow: hidden;
}

::view-transition-old(root),
::view-transition-new(root) {
  animation: none;
  mix-blend-mode: normal;
  opacity: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: none;
  object-position: 0 0;
  filter: none;
}

::view-transition-new(root) {
  z-index: 0;
}

/*
  Viewport-sized old snapshot. 100deg = 10° off vertical, top leaning
  right (/). Both leading edges share that lean (parallelogram slit).
  The slit starts closed and grows outward along the axis perpendicular
  to the lines.

  The picker is its own layer (view-transition-name: theme-picker), so
  the page's snapshot is the page under the dimmer's tint, with the
  dimmer's blur left out, since a backdrop blur is not carried into
  snapshots. That snapshot is frosted here with the same 4px the dimmer
  gives the live page; the picker's layer, the cards alone, sits on top
  sharp, as on screen. Both open along the same slit. A filter is
  applied before the mask, so the blades stay sharp.
*/
::view-transition-old(root),
::view-transition-old(theme-picker) {
  animation: theme-split-wipe 200ms cubic-bezier(0.7, 0, 1, 1) both;
  mask-image: linear-gradient(
    100deg,
    #000 0,
    #000 calc(50% - var(--theme-wipe) + 1px),
    #0000 calc(50% - var(--theme-wipe) + 1px),
    #0000 calc(50% + var(--theme-wipe) - 1px),
    #000 calc(50% + var(--theme-wipe) - 1px),
    #000 100%
  );
  mask-mode: alpha;
  mask-size: 100% 100%;
  mask-repeat: no-repeat;
}

::view-transition-old(root) {
  z-index: 1;
}

/* Frosted only for a wipe that starts from the picker, where the page
   already wears this blur under the dimmer. A theme taken anywhere else,
   the home page's theme section, wipes from a sharp page. */
:root.theme-wipe-frosted::view-transition-old(root) {
  filter: blur(4px);
}

/* The same box as the page's group, whatever box the picker was captured
   in: the browser sizes a group to its element, and the picker's box stops
   short of a scrollbar the page's snapshot includes. Two slits that are a
   few pixels apart show as a line along each blade. */
::view-transition-group(theme-picker) {
  animation: none;
  position: absolute;
  inset: 0;
  width: auto;
  height: auto;
  transform: none;
  z-index: 2;
}

::view-transition-image-pair(theme-picker) {
  animation: none;
  inset: 0;
}

::view-transition-old(theme-picker) {
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: none;
  object-position: 0 0;
}

@keyframes theme-split-wipe {
  from {
    --theme-wipe: 0px;
  }

  to {
    --theme-wipe: 80%;
  }
}

@media (prefers-reduced-motion: reduce) {
  ::view-transition-old(root),
  ::view-transition-new(root),
  ::view-transition-old(theme-picker) {
    animation: none;
  }
}