/*
 * Liquid glass.
 *
 * Every surface is the same recipe: a thin wash of white, the ground behind it
 * blurred, a hairline that catches the light, and a highlight falling from the
 * top edge. It only reads as glass when there is something behind it to
 * refract, which is why this look brings its own ground — two soft drifting
 * blobs of the dashboard's own colours, or the image it was given.
 *
 * Dark is the natural direction for it. In light the same wash would be white
 * on white, so the mixture goes the other way: more opaque, brighter edges,
 * and a shadow soft enough not to read as a border.
 *
 * Paint only; the measurements are in `../core/core.css`.
 */

[data-look="glass"] {
  --gl-bg: rgb(255 255 255 / 0.1);
  --gl-bg-strong: rgb(255 255 255 / 0.18);
  --gl-border: rgb(255 255 255 / 0.2);
  --gl-highlight: rgb(255 255 255 / 0.22);
  --gl-inset: inset 0 1px 1px rgb(255 255 255 / 0.1);
  --gl-shadow: 0 8px 32px rgb(0 0 0 / 0.37);
  --gl-blur: 24px;
  --gl-glow: 0 0 22px color-mix(in srgb, var(--primary) 45%, transparent);
  --gl-radius: 1.25rem;
  --gl-track: rgb(255 255 255 / 0.16);
  --gl-blob-opacity: 0.5;
}

[data-look="glass"].light {
  --gl-bg: rgb(255 255 255 / 0.5);
  --gl-bg-strong: rgb(255 255 255 / 0.7);
  --gl-border: rgb(255 255 255 / 0.75);
  --gl-highlight: rgb(255 255 255 / 0.6);
  --gl-shadow: 0 8px 32px rgb(0 0 0 / 0.12);
  --gl-track: rgb(0 0 0 / 0.1);
  /* Diluted by the white it mixes into, so it takes more of it to show. */
  --gl-blob-opacity: 0.6;
}

/* --- the ground ---------------------------------------------------------- */

/*
 * Glass has nothing to be glass against on a flat white page: a translucent
 * white tile over a white ground is a shadow and nothing else. So the look
 * brings a ground of its own — a wash of the dashboard's primary, deepest at
 * the top where a room's light would come from — and the tiles then sit
 * *brighter* than what is behind them, which is what reads as a pane.
 */
.gl-ground {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    120% 90% at 50% 0%,
    color-mix(in srgb, var(--primary) 14%, var(--background)),
    var(--background) 70%
  );
}

.gl-blob {
  position: absolute;
  width: 55%;
  aspect-ratio: 1;
  border-radius: 50%;
  /* A gradient that falls off rather than a blurred circle: `filter: blur()`
     on something this size costs a full-screen pass every frame, and a panel
     on the wall is often the slowest machine in the house. */
  background: radial-gradient(
    circle closest-side,
    var(--gl-blob, var(--primary)),
    transparent 100%
  );
  opacity: var(--gl-blob-opacity, 0.55);
}

.gl-blob:nth-child(1) {
  left: -15%;
  top: -25%;
  --gl-blob: var(--primary);
}

.gl-blob:nth-child(2) {
  right: -20%;
  top: 5%;
  --gl-blob: var(--accent);
}

.gl-blob:nth-child(3) {
  left: 25%;
  bottom: -35%;
  opacity: calc(var(--gl-blob-opacity, 0.55) * 0.65);
  --gl-blob: var(--primary);
}

/* --- surfaces ------------------------------------------------------------ */

/* No `position` of its own: this is worn by a tile, a rail and a notice alike,
   and each of those is placed by whatever puts it there. Stating it here won
   over the utility that placed them — an unlayered rule beats a layered one —
   and collapsed the rail into the flow. */
.gl-surface {
  border: 1px solid var(--gl-border);
  border-radius: var(--gl-radius);
  background: var(--gl-bg);
  box-shadow: var(--gl-shadow), var(--gl-inset);
  backdrop-filter: blur(var(--gl-blur));
  -webkit-backdrop-filter: blur(var(--gl-blur));
}

/*
 * The light on the pane: a bright line along the top edge where it catches,
 * and a short wash falling from it. Carrying the wash the whole way down reads
 * as a gradient fill rather than as glass — the edge is what does the work.
 */
.gl-surface::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(to bottom, var(--gl-highlight), transparent 30%);
  opacity: 0.55;
  box-shadow: inset 0 1px 0 rgb(255 255 255 / 0.28);
}

.gl-frame > * {
  position: relative;
  z-index: 1;
}

.gl-frame[data-selected] {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
}

.gl-frame-title {
  color: var(--muted-foreground);
}

.gl-rail {
  border-radius: 9999px;
}

.gl-notice {
  border-radius: 9999px;
  color: var(--muted-foreground);
}

/* --- the glow a press leaves --------------------------------------------- */

.gl-pressable {
  position: relative;
  /* `clip` rather than `hidden`: the press ripple below is inset 0 and rounds
     with the surface regardless, but a segment's `--gl-glow` thumb sits inside
     this box too and needs room to fade rather than being cut off at it. */
  overflow: clip;
  overflow-clip-margin: 1.5rem;
  isolation: isolate;
}

.gl-pressable > .gl-glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(
    circle at var(--press-x, 50%) var(--press-y, 50%),
    rgb(255 255 255 / 0.35),
    transparent 60%
  );
  transition: opacity var(--duration-base) var(--ease-standard);
}

.gl-pressable:hover > .gl-glow,
.gl-pressable:focus-visible > .gl-glow {
  opacity: 0.7;
}

.gl-pressable:active > .gl-glow {
  opacity: 1;
}

[data-touch] .gl-pressable:hover > .gl-glow {
  opacity: 0;
}

/* Lifted one at a time rather than by a blanket rule over every child: that
   one restated `position` on things already placed — a sliding pill, a switch's
   thumb — and dropped them back into the flow. */
.gl-switch-thumb,
.gl-segment-label,
.gl-lift {
  position: relative;
  z-index: 1;
}

/* --- controls ------------------------------------------------------------ */

.gl-button {
  display: inline-flex;
  min-width: 0;
  min-height: var(--dui-control);
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1px solid var(--gl-border);
  border-radius: 9999px;
  padding-inline: 1.25rem;
  font-size: var(--dui-text);
  font-weight: 500;
  background: var(--gl-bg);
  color: var(--foreground);
  box-shadow: var(--gl-inset);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.gl-button[data-variant="filled"],
.gl-button[aria-pressed="true"] {
  background: color-mix(in srgb, var(--primary) 78%, transparent);
  border-color: color-mix(in srgb, var(--primary) 55%, white);
  color: var(--primary-foreground);
  box-shadow: var(--gl-glow), var(--gl-inset);
}

.gl-button[data-variant="text"] {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
}

.gl-button:disabled {
  opacity: 0.45;
  pointer-events: none;
}

.gl-switch {
  position: relative;
  display: inline-flex;
  width: calc(var(--dui-control) * 1.75);
  height: var(--dui-control);
  flex: none;
  align-items: center;
  justify-content: flex-start;
  border: 1px solid var(--gl-border);
  border-radius: 9999px;
  padding: 0.1875rem;
  background: var(--gl-track);
  box-shadow: var(--gl-inset);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.gl-switch[data-state="on"] {
  justify-content: flex-end;
  background: color-mix(in srgb, var(--primary) 70%, transparent);
  box-shadow: var(--gl-glow), var(--gl-inset);
}

.gl-switch-thumb {
  display: block;
  height: calc(var(--dui-control) - 0.5rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgb(0 0 0 / 0.35);
}

.gl-switch:disabled {
  opacity: 0.45;
  pointer-events: none;
}

.gl-slider .dui-slider-rail {
  border-radius: 9999px;
  background: var(--gl-track);
  box-shadow: var(--gl-inset);
}

.gl-slider .dui-slider-fill {
  border-radius: 9999px;
  background: color-mix(in srgb, var(--primary) 85%, white);
  box-shadow: var(--gl-glow);
}

.gl-slider .dui-slider-thumb {
  background: #fff;
  border: 1px solid var(--gl-border);
  box-shadow: 0 2px 8px rgb(0 0 0 / 0.35);
}

.gl-segmented {
  position: relative;
  display: grid;
  min-width: 0;
  align-items: center;
  border: 1px solid var(--gl-border);
  border-radius: 9999px;
  padding: 0.25rem;
  background: var(--gl-bg);
  box-shadow: var(--gl-inset);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.gl-segmented[data-orientation="vertical"] {
  height: 100%;
  grid-auto-flow: row;
  grid-auto-rows: minmax(0, 1fr);
  border-radius: 1.25rem;
}

.gl-segment {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: calc(var(--dui-control) - 0.5rem);
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  padding-inline: 0.625rem;
  font-size: var(--dui-text);
  color: var(--muted-foreground);
}

.gl-segment[data-active] {
  color: var(--primary-foreground);
}

.gl-segment-thumb {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: 9999px;
  background: color-mix(in srgb, var(--primary) 85%, transparent);
  box-shadow: var(--gl-glow), var(--gl-inset);
}

.gl-segment-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.gl-field {
  display: flex;
  width: 100%;
  min-width: 0;
  min-height: var(--dui-control);
  align-items: center;
  gap: 0.5rem;
  border: 1px solid var(--gl-border);
  border-radius: 0.875rem;
  background: var(--gl-bg);
  padding-inline: 0.875rem;
  font-size: var(--dui-text);
  color: var(--foreground);
  text-align: left;
  box-shadow: var(--gl-inset);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.gl-field::placeholder {
  color: var(--muted-foreground);
}

.gl-field:disabled {
  opacity: 0.45;
  pointer-events: none;
}

.gl-menu {
  border: 1px solid var(--gl-border);
  border-radius: 0.875rem;
  background: color-mix(in srgb, var(--popover) 75%, transparent);
  color: var(--popover-foreground);
  box-shadow: var(--gl-shadow), var(--gl-inset);
  backdrop-filter: blur(var(--gl-blur));
  -webkit-backdrop-filter: blur(var(--gl-blur));
}

/* --- readings ------------------------------------------------------------ */

.gl-track {
  border-radius: 9999px;
  background: color-mix(
    in srgb,
    var(--dui-fill, var(--primary)) 22%,
    transparent
  );
  box-shadow: var(--gl-inset);
}

.gl-fill {
  border-radius: 9999px;
  background: var(--dui-fill, var(--primary));
  box-shadow: 0 0 14px
    color-mix(in srgb, var(--dui-fill, var(--primary)) 55%, transparent);
}

.gl-disc-thumb {
  border: 2px solid rgb(255 255 255 / 0.85);
  box-shadow: 0 2px 10px rgb(0 0 0 / 0.4);
}

/* --- focus --------------------------------------------------------------- */

[data-look="glass"]
  :is(.gl-button, .gl-switch, .gl-segment, .gl-field, .dui-disc):focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}