/* CSS Custom Properties */
:root {
  --fade: 900ms;
  --gap: clamp(1.2rem, 3vw, 2.6rem);
  --bg: #663b3b;
  --fg: #99bbbe;
  --accent: rgba(255, 255, 255, 0.15);
}

@media (prefers-color-scheme: system-ui) {
  :root {
    --bg: #fafafa;
    --fg: #ff0000;
    --accent: rgba(0, 0, 0, 0.1);
  }
}

/* Base Styles */
html,
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 12px/1.55 'Ubuntu Mono', ui-monospace, monospace;
  text-rendering: optimizeLegibility;
  overflow: hidden;
}

/* Utility Classes */
.fade {
  opacity: 0;
  transition: opacity var(--fade) ease;
}

.fade.show {
  opacity: 1;
}

#bg,
#ov {
  transition: opacity 6s ease-in-out;
}

.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.mark {
  letter-spacing: 0.12em;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  text-transform: uppercase;
}

.void {
  display: none;
}

/* Background Elements */
#bg,
#ov {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  contain: layout paint style;
  will-change: opacity, transform;
  pointer-events: none;
}

/* Main Surface */
.surface {
  position: relative;
  min-height: 100vh;
  padding: var(--gap);
  display: grid;
  gap: var(--gap);
  align-content: center;
  justify-items: center;
}

.surface::after {
  content: "";
  position: fixed;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.6), transparent 38%, rgba(0, 0, 0, 0.8));
  pointer-events: none;
}

/* Intro Section */
.intro {
  z-index: 1;
  display: grid;
  place-items: center;
  gap: clamp(1rem, 3vw, 2.4rem);
  padding: clamp(1.5rem, 4vw, 3rem);
}

/* Codex Component */
.codex {
  min-width: clamp(12rem, 36vw, 26rem);
  max-width: 30rem;
  padding: 0;
  border-radius: 0;
  font-size: clamp(0.75rem, 1.9vw, 1rem);
  line-height: 1.6;
  text-align: center;
  letter-spacing: 0.14em;
  opacity: 0;
  text-shadow: 28px 28px 28px rgb(158, 43, 43);
  transition: opacity 3.6s ease;
}

.codex.show {
  opacity: 1;
}

.codex span {
  display: block;
  text-shadow:  28px 28px 28px rgb(158, 43, 43);
}

/* Gallery Component */
.gallery {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  justify-content: center;
  align-content: start;
  gap: clamp(1.4rem, 4vw, 3.2rem);
  padding: clamp(2rem, 6vw, 6rem);
  pointer-events: none;
}

.gallery__item {
  margin: 0;
  opacity: var(--item-opacity, 0.98);
  transition: opacity var(--item-transition, 0.8s), transform 8s ease-in-out;
  mix-blend-mode: var(--item-blend-mode, screen);
  width: var(--item-width, 18rem);
  height: var(--item-height, auto);
  position: absolute;
  top: var(--item-top, 50%);
  left: var(--item-left, 50%);
  transform: translate(-50%, -50%);
  mask: var(--item-mask, radial-gradient(ellipse at center, black 60%, transparent 100%));
  -webkit-mask: var(--item-mask, radial-gradient(ellipse at center, black 60%, transparent 100%));
  animation: float var(--item-float-duration, 20s) ease-in-out infinite alternate;
}

@keyframes float {
  0% {
    transform: translate(-50%, -50%) translate(var(--item-drift-x, 0px), var(--item-drift-y, 0px)) scale(var(--item-scale-start, 1));
  }
  100% {
    transform: translate(-50%, -50%) translate(var(--item-drift-x-end, 0px), var(--item-drift-y-end, 0px)) scale(var(--item-scale-end, 1));
  }
}

.gallery__item.show {
  opacity: var(--item-show-opacity, 1);
}

.gallery__item:hover {
  transform: translate(-50%, -50%) scale(1.1) !important;
  transition: transform 0.3s ease-out !important;
}

.gallery__item.cursor-near {
  transform: translate(-50%, -50%) scale(1.05) !important;
  transition: transform 0.2s ease-out !important;
}

.gallery__item.key-activated {
  animation: pulse 0.5s ease-in-out;
}

@keyframes pulse {
  0% { transform: translate(-50%, -50%) scale(1); }
  50% { transform: translate(-50%, -50%) scale(1.2); }
  100% { transform: translate(-50%, -50%) scale(1); }
}

.gallery__item img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 0rem;
}

/* Animations */
@keyframes haze {
  from {
    transform: translate(-4%, 4%) scale(0.96);
  }
  to {
    transform: translate(6%, -3%) scale(1.06);
  }
}

/* Responsive Design */
@media (max-width: 820px) {
  .surface {
    padding: calc(var(--gap) * 1.5) var(--gap);
    gap: calc(var(--gap) * 0.8);
  }

  .surface::after {
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.4), transparent 48%, rgba(0, 0, 0, 0.65));
  }

  .gallery {
    grid-template-columns: 1fr;
    justify-content: center;
    gap: 1.5rem;
    padding: clamp(1.5rem, 6vw, 3rem);
  }
}

/* Background Effects */
body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
}

body::before {
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.02) 0, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 3px),
              repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.015) 0, rgba(255, 255, 255, 0.015) 1px, transparent 1px, transparent 3px);
  opacity: 0.28;
}

body::after {
  background: linear-gradient(180deg, rgba(10, 10, 10, 0.4), rgba(0, 0, 0, 0.55));
  opacity: 0.75;
}