:root {
  --color-light: #fafbf2;
  --color-dark: #212529;
  --color-neutral: #BBBBBB;
  --bg: var(--color-light);
  --fg: var(--color-dark);
  --muted: color-mix(in srgb, var(--fg) 62%, transparent);
  --surface-bg: var(--color-dark);
  --surface-fg: var(--color-light);
  --surface-width: min(360px, 86vw);
  --radius: 4px;
  --blur: 12px;
  --zoom-scale: 0;
  --transition-step: 0.25;
  --font-size-caption: 0.5rem;
  --font-size-heading: 0.85rem;
  --font-size-label: 0.5rem;
  --edge-x: 5%;
  --edge-y: 4vh;
  --gutter: 2em;
  --frame-w: 84vmin;
  --frame-h: 84vmin;
  --font-family: "montserrat", sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-family);
  overflow: hidden;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
}

#stage {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
  cursor: pointer;
}
#stage.is-hovering {
  cursor: none;
}

.frame {
  position: relative;
  width: var(--frame-w);
  height: var(--frame-h);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stack {
  position: relative;
  max-width: var(--frame-w);
  max-height: var(--frame-h);
  display: grid;
  grid-template-columns: 100%;
  grid-template-rows: 100%;
  overflow: hidden;
}
.stack > .placeholder,
.stack > picture {
  grid-area: 1/1;
  width: 100%;
  height: 100%;
}
.stack > .placeholder {
  background: var(--color-neutral);
  border-radius: var(--radius);
}
.stack > picture {
  display: block;
  opacity: 0;
  will-change: opacity, transform;
  pointer-events: none;
}
.stack > picture > img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius);
  -webkit-user-drag: none;
}

#nav-hint {
  position: fixed;
  top: 0;
  left: 0;
  transform: translate(-50%, -50%);
  font-size: var(--font-size-label);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-neutral);
  mix-blend-mode: difference;
  opacity: 0;
  pointer-events: none;
  white-space: nowrap;
  z-index: 200;
}

#site-header {
  position: fixed;
  top: var(--edge-y);
  left: var(--edge-x);
  right: var(--edge-x);
  z-index: 100;
  display: flex;
  justify-content: center;
  pointer-events: none;
}

#wordmark {
  font-size: var(--font-size-heading);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg);
  mix-blend-mode: difference;
}

#info-toggle {
  position: fixed;
  top: var(--edge-y);
  right: var(--edge-x);
  z-index: 300;
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  font: inherit;
  font-size: var(--font-size-label);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--surface-bg);
  cursor: pointer;
}

#overlay {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
#overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

#info-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 310;
  width: var(--surface-width);
  max-width: 100vw;
  height: 100%;
  background: var(--surface-bg);
  color: var(--surface-fg);
  text-align: left;
  padding: var(--edge-y) var(--gutter);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transform: translateX(100%);
  transition: transform 0.4s ease;
}
#info-drawer.is-open {
  transform: translateX(0);
}
#info-drawer h1 {
  font-size: 1em;
}
#info-drawer h2 {
  margin: 0 0 0.5em;
  font-size: var(--font-size-label);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
#info-drawer p {
  margin: 0 0 1.5em;
  font-size: 0.8rem;
  line-height: 1.5;
}
#info-drawer p.profile {
  font-size: 0.66em;
}
#info-drawer .contact {
  margin-top: 2em;
}
#info-drawer .contact .profile-photo {
  display: block;
  width: 50%;
  aspect-ratio: 1/1;
  margin-top: 1.5em;
  border-radius: 50%;
  object-fit: cover;
}
#info-drawer .copyright {
  font-size: 0.5rem;
}
#info-drawer a {
  color: inherit;
  text-decoration: none;
}

#drawer-close {
  position: absolute;
  top: var(--edge-y);
  right: var(--edge-x);
  background: none;
  border: 0;
  padding: 0;
  margin: 0;
  font: inherit;
  font-size: var(--font-size-label);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--surface-fg);
  cursor: pointer;
}

figcaption#caption {
  position: fixed;
  left: var(--edge-x);
  right: var(--edge-x);
  bottom: var(--edge-y);
  text-align: center;
  pointer-events: none;
}

#caption-title {
  margin: 0;
  font-size: var(--font-size-caption);
  font-weight: 500;
  letter-spacing: 0.02em;
}

#caption-desc {
  margin: 0;
  line-height: 1em;
  font-size: calc(var(--font-size-caption) * 0.82);
  color: var(--muted);
}

.progress {
  position: fixed;
  right: var(--edge-x);
  bottom: var(--edge-y);
  font-size: 0.75rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 767px) {
  :root {
    --frame-w: 97vw;
    --frame-h: 88vh;
    --edge-y: 3vh;
  }
}