:root {
  --font-family: Verdana, Geneva, Tahoma, sans-serif;

  --text-colour: #000;
  --border-colour: #bbb;

  --background-colour: #eee;
  --gallery-colour: #fff;
  --viewer-colour: #fff;
  --sub-colour: #eee;

  --size-1: 5vmin;
  --size-2: calc(var(--size-1) / 2);
  --size-3: calc(var(--size-2) / 2);
  --size-4: calc(var(--size-3) / 2);
  --size-5: calc(var(--size-4) / 2);
  --size-6: calc(var(--size-5) / 2);
  --size-7: calc(var(--size-6) / 2);

  --size-1-5: calc((var(--size-1) + var(--size-2)) / 2);
  --size-1-75: calc((var(--size-1) + var(--size-1-5)) / 2);
  --size-5-5: calc((var(--size-5) + var(--size-6)) / 2);

  --size-1M: 5vmax;
  --size-2M: calc(var(--size-1M) / 2);

  --size-1-5M: calc((var(--size-1M) + var(--size-2M)) / 2);
  --size-1-75M: calc((var(--size-1M) + var(--size-1-5M)) / 2);
}

* {
  box-sizing: border-box;
  min-height: 0;
  max-width: 100%;
  max-height: 100%;
  overflow: hidden;
  min-width: 0;
}

html {
  font-size: 2vmin;
  height: 100%;
}

body {
  --gallery-pane-width: 67vw;
  --gallery-pane-height: 100vw;
  --viewer-width: 33vw;
  --viewer-height: 100vw;

  margin: 0;
  min-height: 100vh;
  height: 100%;
  background-color: var(--border-colour);
  display: flex;
  gap: 1px;
}

body.hidden > #gallery-panel {
  transform: translateX(25%);
  transition: max-width 0.15s ease, max-height 0.15s ease,
    transform 0.15s ease 1.5s;
}

body.hidden > #viewer {
  transform: translateX(100%);
}

div,
span,
input,
select {
  font-family: var(--font-family);
  color: var(--text-colour);
}

div,
span {
  user-select: none;
}

div {
  display: flex;
  flex-direction: column;
}

#gallery-panel,
#gallery-outer,
#gallery,
#viewer,
#viewer > * {
  width: 100%;
  height: 100%;
}

#gallery-panel {
  background-color: var(--background-colour);
  max-width: var(--gallery-pane-width);
  padding: var(--size-1);
  order: 0;
  max-height: var(--gallery-pane-height);
  position: relative;
  transition: max-width 0.15s ease, max-height 0.15s ease, transform 0.15s ease;
}

#gallery-outer {
  background-color: var(--gallery-colour);
  padding: var(--size-2);
  border-radius: var(--size-2);
  border: 1px solid var(--border-colour);
}

#gallery {
  --cols: 4;
  --rows-n: 2;

  --cell-width: calc(
    (
        var(--gallery-pane-width) - var(--size-1) * 2 - var(--size-2) * 2 -
          var(--size-3) * (var(--cols) - 1) - 3px
      ) / var(--cols)
  );
  --cell-height: calc(var(--cell-width) / var(--rows-n));

  border-radius: var(--size-4);
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--cell-width));
  grid-auto-rows: var(--cell-height);
  gap: var(--size-3);
  overflow-y: auto;
  transition: grid-template-columns 0.15s ease, grid-rows-columns 0.15s ease;
}

#viewer {
  --type2-background: var(--type1-background);
  --type2-foreground: var(--type1-foreground);

  --inside-1: var(--type1-background);
  --inside-2: var(--type2-background);

  --outside-1: var(--type1-foreground);
  --outside-2: var(--type2-foreground);

  background-color: var(--viewer-colour);
  max-width: var(--viewer-width);
  order: 1;
  max-height: var(--viewer-height);
  display: grid;
  place-items: center;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr 5fr 1fr 1fr 6fr;
  padding: var(--size-2);
  gap: var(--size-2);
  user-select: none;
  transition: transform 0.15s ease;
  position: absolute;
  right: 0;
  bottom: 0;
}

#viewer > .name-wrapper {
  grid-row: 1;
  grid-column: 1;
  gap: var(--size-3);
  overflow: visible;
}

#viewer > .name-wrapper > * {
  text-wrap-mode: nowrap;
  overflow: visible;
  text-align: center;
  justify-content: center;
}

#viewer > .name-wrapper > .name {
  font-size: 1.5em;
}

#viewer > .name-wrapper > .title {
  font-size: 0.75em;
}

#viewer > .image-wrapper {
  justify-content: center;
  align-items: center;
  grid-row: 2;
  grid-column: 1;
}

#viewer > .image-wrapper > .image {
  --ds-colour: #fff;
  --ds-width: var(--size-7);
  --ds2-colour: rgba(0, 0, 0, 0.2);
  --ds2-width: var(--size-6);

  max-width: 90%;
  max-height: 90%;

  filter: drop-shadow(calc(var(--ds-width)) 0 0 var(--ds-colour))
    drop-shadow(calc(-1 * var(--ds-width)) 0 0 var(--ds-colour))
    drop-shadow(0 calc(var(--ds-width)) 0 var(--ds-colour))
    drop-shadow(0 calc(-1 * var(--ds-width)) 0 var(--ds-colour))
    drop-shadow(calc(var(--ds2-width)) 0 0 var(--ds2-colour))
    drop-shadow(calc(-1 * var(--ds2-width)) 0 0 var(--ds2-colour))
    drop-shadow(0 calc(var(--ds2-width)) 0 var(--ds2-colour))
    drop-shadow(0 calc(-1 * var(--ds2-width)) 0 var(--ds2-colour));
}

#viewer > .entries-panel,
#viewer > .entries-panel > .entries-outer,
#viewer > .entries-panel > .entries-outer > .entries {
  width: 100%;
  height: 100%;
}

#viewer > .entries-panel {
  grid-row: 5;
  grid-column: 1;
}

#viewer > .entries-panel > .entries-outer {
  padding: var(--size-3);
  border-radius: var(--size-3);
  border: 1px solid var(--border-colour);
  background-color: var(--sub-colour);
  user-select: text;
}

#viewer > .entries-panel > .entries-outer > .entries {
  overflow-y: auto;
  gap: var(--size-2);
  border-radius: var(--size-4);
}

#viewer > .entries-panel > .entries-outer > .entries > * {
  min-height: auto;
  overflow: visible;
  user-select: text;
}

#viewer > .types,
#viewer > .abilities {
  flex-direction: row;
  place-items: center;
  justify-content: space-between;
  gap: var(--size-3);
  overflow: hidden;
}

#viewer > .types > *,
#viewer > .abilities > * {
  width: 100%;
  height: 100%;
  background-color: var(--sub-colour);
  border: 1px solid var(--border-colour);
  border-radius: var(--size-4);
  justify-content: center;
  align-items: center;
  text-align: center;
}

#viewer > .types {
  grid-row: 3;
  grid-column: 1;
}

#viewer > .types > * {
  background-color: var(--type-bg-colour);
  color: var(--type-fg-colour);
  border: 1px solid var(--type-bd-colour);
}

#viewer > .types > :nth-child(1) {
  --type-bg-colour: var(--inside-1);
  --type-fg-colour: var(--outside-1);
  --type-bd-colour: var(--outside-1);
}

#viewer > .types > :nth-child(2) {
  --type-bg-colour: var(--inside-2);
  --type-fg-colour: var(--outside-2);
  --type-bd-colour: var(--outside-2);
}

#viewer > .abilities {
  grid-row: 4;
  grid-column: 1;
  justify-content: center;
}

#viewer > .abilities > * {
  max-width: calc((100% - var(--size-3) * 2) / 3);
}

.slide {
  --type2-background: var(--type1-background);
  --type2-foreground: var(--type1-foreground);

  --gradient-split-distance: 1px;
  --gradient-angle: 112.5deg;

  --type1-percent: calc(50% - var(--gradient-split-distance));
  --type2-percent: calc(50% + var(--gradient-split-distance));

  --inside-1: var(--type1-background);
  --inside-2: var(--type2-background);

  --outside-1: var(--type1-foreground);
  --outside-2: var(--type2-foreground);

  border: 1px solid var(--border-colour);
  border-radius: var(--size-3);
  padding: var(--size-4);
  user-select: none;
  position: relative;
  overflow: visible;

  background: linear-gradient(
        var(--gradient-angle),
        var(--inside-1) var(--type1-percent),
        var(--inside-2) var(--type2-percent)
      )
      padding-box,
    linear-gradient(
        var(--gradient-angle),
        var(--outside-1) var(--type1-percent),
        var(--outside-2) var(--type2-percent)
      )
      border-box;
  border: 1px solid transparent;
  background-size: 110% 110%;
  background-position: center;

  position: relative;
  overflow: hidden;
  transition: filter 0.3s ease;
}

.slide.fade {
  opacity: 0.25;
}

#gallery:has(.show) > .slide:not(.show) {
  display: none;
}

#gallery:has(.highlight) > .slide:not(.highlight) {
  filter: brightness(0.5);
}

.slide::before {
  content: "";
  position: absolute;
  top: 0;
  left: -75%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    110deg,
    rgba(255, 255, 255, 0) 0%,
    rgba(255, 255, 255, 0) 30%,
    rgba(255, 255, 255, 0.5) 50%,
    rgba(255, 255, 255, 0) 70%,
    rgba(255, 255, 255, 0) 100%
  );
  transform: skewX(-20deg);
  z-index: 999;

  animation: shine-move 1.5s ease-in-out, shine-snap 0s step-end 1.5s;
  animation-iteration-count: infinite;

  transition: opacity 0.15s ease;
  opacity: 0;
}

[cool-stuff] .slide.shine::before {
  opacity: 1;
}

@keyframes shine-move {
  0% {
    left: -75%;
  }
  100% {
    left: 125%;
  }
}

@keyframes shine-snap {
  from {
    left: -75%;
  }
  to {
    left: -75%;
  }
}

.slide > .mask {
  position: absolute;
  inset: 0;

  background: linear-gradient(
    var(--gradient-angle),
    var(--outside-1) var(--type1-percent),
    var(--outside-2) var(--type2-percent)
  );
  background-clip: text;

  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: 1fr 3fr;
  place-items: center;

  background-size: inherit;
  background-position: inherit;

  overflow: visible;
}

.slide > .mask > .name {
  font-size: calc(var(--cell-width) * 0.05);
  font-weight: bold;
  color: transparent;
  transition: font-size 0.15s ease;
}

.slide > .mask > .image-wrapper {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  overflow: visible;
  position: relative;
}

.slide > .mask > .image-wrapper > .image {
  --ds-colour: #fff;
  --ds-width: var(--size-7);
  --ds2-colour: rgba(0, 0, 0, 0.2);
  --ds2-width: var(--size-6);

  max-width: 90;
  max-height: 90%;
  filter: drop-shadow(calc(var(--ds-width)) 0 0 var(--ds-colour))
    drop-shadow(calc(-1 * var(--ds-width)) 0 0 var(--ds-colour))
    drop-shadow(0 calc(var(--ds-width)) 0 var(--ds-colour))
    drop-shadow(0 calc(-1 * var(--ds-width)) 0 var(--ds-colour))
    drop-shadow(calc(var(--ds2-width)) 0 0 var(--ds2-colour))
    drop-shadow(calc(-1 * var(--ds2-width)) 0 0 var(--ds2-colour))
    drop-shadow(0 calc(var(--ds2-width)) 0 var(--ds2-colour))
    drop-shadow(0 calc(-1 * var(--ds2-width)) 0 var(--ds2-colour));
  z-index: 1;
}

#options-wrapper,
#search-bar-wrapper {
  position: absolute;
  padding: var(--size-4);
  height: var(--size-1-75);
  align-items: center;
  z-index: 999;
  font-size: 0.75rem;
  width: var(--gallery-pane-width);
  left: 0;
  right: 0;
  gap: var(--size-4);
}

#options,
#search-bar,
#sort {
  border: 1px solid var(--border-colour);
  text-align: center;
  height: 100%;
  border-radius: var(--size-4);
  transition: opacity 0.3s ease-in-out;
  justify-content: center;
  flex-direction: row;
  background-color: var(--viewer-colour);
}

#options:not(:hover):not(:has(:focus)),
#search-bar:placeholder-shown:not(:hover):not(:focus),
#sort:not(:hover):not(:has(:focus)) {
  opacity: 0.5;
}

#search-bar-wrapper {
  top: 0;
  flex-direction: row;
  width: 90%;
  margin: auto;
}

#options-wrapper {
  bottom: 0;
}

#options {
  gap: var(--size-2);
  width: 75%;
}

#options > * {
  flex-direction: row;
  gap: var(--size-5);
  align-items: center;
}

#search-bar {
  width: 100%;
}

#sort {
  padding: var(--size-5);
  gap: var(--size-5);
  height: 100%;
  flex-direction: row;
}

label {
  user-select: none;
}

select {
  background-color: var(--sub-colour);
  border: 1px solid var(--border-colour);
  border-radius: var(--size-5);
}