:root {
  --slide-count: 6;
  --split-progress: 0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: calc(var(--slide-count) * 100vh);
  overflow-x: hidden;
  transition: background 500ms ease;

}

body.after-first-slide {
  background: #FCE900;  
}

#scroll-space {
  height: calc(var(--slide-count) * 100vh);
}

#viewport {
  position: sticky;
  top: 0;
  height: 100vh;
  width: 100%;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-template-rows: repeat(2, minmax(0, 1fr));
  isolation: isolate;
  overflow: hidden;
  z-index: 1;
}

.fixed-grid {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(1.5);
  width: min(60vw, 360px);
  height: min(60vw, 360px);
  transform-origin: center center;
  z-index: 0;
  pointer-events: none;
  --overlay-alpha: 1;
}

body.after-first-slide .fixed-grid {
  transform: translate(-50%, -50%) scale(4.5);
}

.fixed-grid .fixed-letter {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 55%;
  height: 55%;
  transform-origin: center center;
  transition: transform 0.6s cubic-bezier(0.25, 0.8, 0.25, 1), opacity 0.35s ease;
  opacity: var(--overlay-alpha);
  mix-blend-mode: multiply;
}

.fixed-grid .fixed-letter img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: opacity 0.35s ease;
}

.fixed-grid .fixed-letter .img-alt {
  opacity: 0;
}

/* body.after-first-slide .fixed-grid {
  mix-blend-mode: difference;
} */

.fixed-grid.blend-difference .fixed-letter {
  mix-blend-mode: normal;
}

.fixed-grid.phase-p .fixed-letter .img-primary {
  opacity: 0;
}

.fixed-grid.phase-p .fixed-letter .img-alt {
  opacity: 1;
}

.fixed-grid .fixed-letter.size-a { width: 80%; height: 80%; }
.fixed-grid .fixed-letter.size-b { width: 67%; height: 110%; }
.fixed-grid .fixed-letter.size-c { width: 87%; height: 80%; }
.fixed-grid .fixed-letter.size-d { width: 69%; height: 86%; }

.step-0-img-0 { transform: translate(-50%, -50%) translate(-30%, -50%); }
.step-0-img-1 { transform: translate(-50%, -50%) translate( 46%, -18%); }
.step-0-img-2 { transform: translate(-50%, -50%) translate( 21%,  49%); }
.step-0-img-3 { transform: translate(-50%, -50%) translate(-42%,  30%); }

.step-1-img-0 { transform: translate(-50%, -50%) translate( 30%, -47%); }
.step-1-img-1 { transform: translate(-50%, -50%) translate( 40%,  20%); }
.step-1-img-2 { transform: translate(-50%, -50%) translate(-40%,  41%); }
.step-1-img-3 { transform: translate(-50%, -50%) translate(-60%, -40%); }

.step-2-img-0 { transform: translate(-50%, -50%) translate( 30%,  33%); }
.step-2-img-1 { transform: translate(-50%, -50%) translate(-57%,  20%); }
.step-2-img-2 { transform: translate(-50%, -50%) translate(-40%, -49%); }
.step-2-img-3 { transform: translate(-50%, -50%) translate( 32%, -37%); }

.step-3-img-0 { transform: translate(-50%, -50%) translate(-40%,  33%); }
.step-3-img-1 { transform: translate(-50%, -50%) translate(-57%, -19%); }
.step-3-img-2 { transform: translate(-50%, -50%) translate( 24%, -49%); }
.step-3-img-3 { transform: translate(-50%, -50%) translate( 38%,  23%); }

.step-4-img-0 { transform: translate(-50%, -50%) translate(-30%, -50%); }
.step-4-img-1 { transform: translate(-50%, -50%) translate( 46%, -18%); }
.step-4-img-2 { transform: translate(-50%, -50%) translate( 21%,  49%); }
.step-4-img-3 { transform: translate(-50%, -50%) translate(-42%,  30%); }

.fixed-grid img.size-a { width: 80%; height: 80%; }
.fixed-grid img.size-b { width: 67%; height: 110%; }
.fixed-grid img.size-c { width: 87%; height: 80%; }
.fixed-grid img.size-d { width: 69%; height: 86%; }

.pane {
  position: relative;
  overflow: hidden;
  display: flex;
  padding: 0;
  border-radius: 0;
}

.quadrant {
  border-radius: 0;
}

.quadrant[data-corner="tl"] {
  --piece-x: 0;
  --piece-y: 0;
}

.quadrant[data-corner="tr"] {
  --piece-x: 1;
  --piece-y: 0;
}

.quadrant[data-corner="br"] {
  --piece-x: 1;
  --piece-y: 1;
}

.quadrant[data-corner="bl"] {
  --piece-x: 0;
  --piece-y: 1;
}

.quadrant-label {
  position: absolute;
  top: calc(var(--space-md) * 1.25);
  left: calc(var(--space-md) * 1.25);
  padding: calc(var(--space-sm) * 0.8) calc(var(--space-md) * 0.9);
  font-size: calc(var(--text-sm) * 0.92);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  background: rgba(3, 6, 10, 0.7);
  /* border-radius: 999px; */
  opacity: calc(var(--split-progress));
  transform: translateY(calc(8px * (1 - var(--split-progress))));
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.scroller {
  flex: 1;
  display: flex;
  width: 100%;
  height: 100%;
  will-change: transform;
  transform: translateZ(0);
}

.quadrant.horizontal .scroller {
  flex-direction: row;
}

.quadrant.vertical .scroller {
  flex-direction: column;
}

[data-slide="0"] .panel-copy {
  justify-content: flex-end;
}

.panel {
  position: relative;
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.panel-content {
  position: absolute;
  width: 200%;
  height: 200%;
  top: 0;
  left: 0;
  padding: clamp(calc(var(--space-lg) * 1.25), 6vw, calc(var(--space-lg) * 3));
  padding: 0;
  border-radius: var(--panel-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: left;
  transform: translate(
    calc(var(--piece-x, 0) * -50%),
    calc(var(--piece-y, 0) * -50%)
  );
  color: rgba(0, 0, 0, 1);
  box-shadow: none;
}

.panel-columns {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(calc(var(--space-lg) * 0.75), 3vw, calc(var(--space-lg) * 1.5));
  align-items: center;
  justify-items: stretch;
  /* background: orange; */
}

.panel-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
}

.image-frame {
  width: 85%;
  aspect-ratio: 6 / 4;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  /*mix-blend-mode: multiply;*/
}

.panel-visual figcaption {
  width: 85%;
  font-weight: 600;
  color: rgba(150, 150, 150, 1.0);
}


.image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.panel-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: calc(var(--space-sm) * 0.3);
  align-items: flex-start;
  text-align: left;
  max-width: 600px;
  width: calc(100% - 40px);
  margin-left: auto;
  margin-right: 0;
  align-self: stretch;
  height: 100%;
  padding: 40px 40px 40px;
}

/* intro slide */

.panel-copy h1, .panel-copy h2 {
  margin: 0;
  display: inline;
  text-align: left;
  font-family: 'Barlow Semi Condensed', 'Noto Sans KR', 'Noto Sans CJK KR', sans-serif;
}

.panel-copy h1 {
  font-size: 100px;
}

.panel-copy h2 {
  font-size: 58px;
  text-transform: uppercase;
}

.panel-copy.intro .title-text, [data-slide="0"] .panel-copy.intro p {
  font-size: 30px;
  line-height: 45px;
  font-weight: 500;
}

.title-text {
  padding-top: 9px;
}

[data-slide="0"] p {
  padding: 20px 0px 40px;
}

.panel-copy.intro p {
  margin: 0;
  max-width: auto;
  font-size: 20px;
  line-height: 30px;
  letter-spacing: -.01em;
  font-weight: 500;
  margin-bottom: 16px;
}

#more-info {
  width: 100%;  
}

#more-info a {
  text-decoration: none;
  display: block;
  font-size: 20px;
  line-height: 30px;
  letter-spacing: -.01em;
  color: rgba(0,0,0,.6);
  font-weight: 500;  
}

#more-info a:hover {
  color: rgba(0,0,0,1);  
}

#more-info a:first-of-type {
  margin-top: 40px;
}

/* adjust background image sizes */

.panel-content {
  background-color: transparent;
  background-position: center center;
  background-size: auto 120%;
  background-repeat: no-repeat;
  color: black;
}

[data-slide="0"] .panel-content, [data-slide="5"] .panel-content {
  background-size: contain;
}

#mobile-viewport {
  display: none;
}

/* nav buttons */

#nav-controls {
  position: fixed;
  bottom: calc(var(--space-lg) * 0.75);
  left: calc(var(--space-lg) * 0.75);
  display: flex;
  gap: var(--space-sm);
  z-index: 5;
  bottom: 20px;
  left: 10px;
}

#nav-controls button {
  border: none;
  border-radius: 0px;
  padding: calc(var(--space-sm) * 1.2) calc(var(--space-md) * 1.3);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  font-size: 14px;
  padding: 5px;
  background: rgba(255, 255, 255, 0.15);
  color: black;  
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
  margin-left: 10px;
}

#nav-controls button:hover:not(:disabled) {
  opacity: .8;
}

#nav-controls button:disabled {
  opacity: 0.2;
  cursor: not-allowed;
}


@media (max-width: 900px) {
  .panel-columns {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .panel-content {
    padding: 20px;
  }

  .panel-copy {
    align-items: center;
    width: 100%;
    max-width: 100%;
    padding: 0px;
  }

  .panel-copy.intro p {
    font-size: 14px;
    line-height: 20px;
    max-width: 100%;
    width: 100%;
  }

  .image-frame {
    width: 100%;
  } 

  .panel-visual figcaption {
    font-size: 12px;
  }
  
  .panel-copy h1 {
    font-size: 40px;
  }

  .panel-copy h2 {
    font-size: 28px;
    text-transform: uppercase;
  }

  .panel-copy.intro .title-text, [data-slide="0"] .panel-copy.intro p {
    font-size: 20px;
    line-height: 30px;
    font-weight: 500;
    width: 100%;
  }

  [data-slide="0"] .panel-copy.intro p {
    margin-bottom: 40px;
  }

  #more-info a {
    font-size:18px;
    line-height: 24px;
    letter-spacing: -.01em;
    font-weight: 600;
  }

  #more-info a:first-of-type {
    margin-top: 20px;
  }

  .recommendation p {
    font-size: 16px;
    line-height: 24px;
    margin: 0px 0px 8px;
  }

  /* scroll adjustment */

  #viewport {
    display: none;
  }

  #mobile-viewport {
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    isolation: isolate;
    overflow: hidden;
  }

  .mobile-pane {
    flex: 1;
    align-items: stretch;
  }

  .mobile-pane .scroller {
    flex-direction: column;
  }

  .mobile-pane .panel-content {
    width: 100%;
    height: 200%;
    transform: translateY(calc((1 - var(--mobile-piece-y, 0)) * -50%));
  }

  .mobile-pane[data-mobile-slice='bottom'] .panel-content {
    --mobile-piece-y: 0;
  }

  .mobile-pane[data-mobile-slice='top'] .panel-content {
    --mobile-piece-y: 1;
  }

  .quadrant-label {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 720px) {
  .fixed-grid {
    transform: translate(-50%, -50%) scale(1.2);
  }  
  #viewport {
    min-height: 100vh;
  }

  .panel-columns{
    grid-template-rows: 40% 60%;
  }

  .panel-copy {
    padding: 40px 0px;
    justify-content: flex-start;
  }

  [data-slide="5"] .panel-columns {
    grid-template-rows: 60% 40%;
  }

  [data-slide="0"] .panel-copy.intro p {
    margin-bottom: 80px;
  }

  #nav-controls {
  }

  .panel-visual figcaption {
    font-size: 11.5px;
  }

  .panel-copy.intro p {
    font-size: 14px;
    line-height: 20px;
    max-width: 100%;
    width: 100%;
    margin-bottom: 10px;
  }

  .panel-copy p {
    font-size: var(--text-sm);
  }

  body.sub-page .judge-profile {
    grid-template-columns: 1fr;
  }

  .image-frame {
    width: 90%;
    margin-top: 80px;
  }

  #nav-controls button {
    font-size: 12px;
    margin-right: 4px;
    background: rgba(255,255,255,.85);    
  }


}