:root {
  /* Intersection Observer triggers each fade when the element crosses 20% into the viewport. */
  --midnight-void: #0B1120;
  --abyss-blue: #070D1A;
  --workshop-dark: #131B2E;
  --parchment-white: #E8E2D6;
  --dusty-silver: #8A8F9C;
  --flame-gold: #FFD580;
  --ember-orange: #FF9E3D;
  --prototype-cyan: #3DD8E0;
  --soft-lavender: #A78BFA;
  --grid-ink: #1E2940;
  --reveal-ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background: var(--midnight-void);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--parchment-white);
  background:
    radial-gradient(circle at 12% 10%, rgba(255, 213, 128, 0.055), transparent 19rem),
    radial-gradient(circle at 92% 34%, rgba(167, 139, 250, 0.055), transparent 24rem),
    linear-gradient(180deg, var(--midnight-void) 0%, var(--abyss-blue) 54%, var(--midnight-void) 100%);
  font-family: "Libre Baskerville", Georgia, serif;
}

#dotfield {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

main {
  position: relative;
  z-index: 1;
}

.prototype-station {
  position: relative;
  min-height: 100vh;
  width: 100%;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: clamp(3rem, 6vw, 6rem) clamp(1.25rem, 4vw, 5rem);
}

.prototype-station::before {
  content: "";
  position: absolute;
  inset: 8vh 0;
  background:
    linear-gradient(90deg, transparent 0 6.2%, rgba(30, 41, 64, 0.36) 6.2% calc(6.2% + 1px), transparent calc(6.2% + 1px)),
    linear-gradient(90deg, transparent 0 18.7%, rgba(30, 41, 64, 0.22) 18.7% calc(18.7% + 1px), transparent calc(18.7% + 1px)),
    linear-gradient(90deg, transparent 0 43.7%, rgba(30, 41, 64, 0.2) 43.7% calc(43.7% + 1px), transparent calc(43.7% + 1px)),
    linear-gradient(90deg, transparent 0 68.7%, rgba(30, 41, 64, 0.2) 68.7% calc(68.7% + 1px), transparent calc(68.7% + 1px)),
    linear-gradient(90deg, transparent 0 93.7%, rgba(30, 41, 64, 0.32) 93.7% calc(93.7% + 1px), transparent calc(93.7% + 1px));
  opacity: 0.55;
  pointer-events: none;
}

.hero-station {
  padding-top: 8rem;
}

.station-content {
  position: relative;
  z-index: 1;
  width: min(100%, 1440px);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(16, minmax(0, 1fr));
  align-items: center;
  gap: clamp(0.75rem, 1.4vw, 1.5rem);
}

.illustration-panel {
  grid-column: 2 / span 8;
  min-height: min(62vw, 650px);
  display: grid;
  place-items: center;
}

.station-reverse .illustration-panel {
  grid-column: 8 / span 8;
  grid-row: 1;
}

.annotation-column {
  grid-column: 11 / span 4;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: clamp(1rem, 2.1vw, 2rem);
}

.station-reverse .annotation-column {
  grid-column: 2 / span 5;
}

.prototype-illustration {
  width: clamp(19rem, 50vw, 46rem);
  max-width: 100%;
  height: auto;
  overflow: visible;
}

.section-label {
  font-family: "Barlow Condensed", Arial, sans-serif;
  font-size: clamp(1rem, 1.45vw, 1.25rem);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--dusty-silver);
}

.version-number {
  position: relative;
  right: -5.5vw;
  max-width: 70vw;
  font-family: "Barlow Condensed", Arial, sans-serif;
  font-size: clamp(6rem, 16vw, 15rem);
  font-weight: 700;
  line-height: 0.76;
  letter-spacing: -0.05em;
  text-transform: uppercase;
  color: var(--grid-ink);
  white-space: nowrap;
}

.maker-note {
  max-width: 38ch;
  color: var(--parchment-white);
  font-size: 18px;
  line-height: 1.75;
  font-style: italic;
}

.maker-note::first-letter {
  color: var(--flame-gold);
}

.handwritten-label {
  font-family: "Caveat", cursive;
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  font-weight: 600;
  color: var(--soft-lavender);
  transform: rotate(-2deg);
}

.handwritten-label.rotate-right {
  transform: rotate(2deg);
  color: var(--flame-gold);
}

.breathing-zone {
  position: relative;
  z-index: 1;
  min-height: 40vh;
  display: grid;
  place-items: center;
  overflow: hidden;
}

.breathing-zone::before,
.breathing-zone::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 1px;
  height: 34%;
  background: var(--grid-ink);
  opacity: 0.7;
}

.breathing-zone::before {
  top: 0;
}

.breathing-zone::after {
  bottom: 0;
}

.candle {
  width: clamp(6rem, 10vw, 8.5rem);
  height: auto;
  overflow: visible;
  filter: drop-shadow(0 0 38px rgba(255, 213, 128, 0.12));
}

.candle-glow {
  opacity: 0.12;
  transform-origin: 80px 86px;
  animation: glowPulse 3s ease-in-out infinite;
}

.flame {
  transform-box: fill-box;
  transform-origin: 50% 85%;
}

.outer-flame {
  animation: outerFlicker 3s ease-in-out infinite;
}

.inner-flame {
  animation: innerFlicker 2.1s ease-in-out infinite;
}

.progress-candle {
  position: fixed;
  z-index: 5;
  left: clamp(1rem, 2vw, 2rem);
  top: 10vh;
  bottom: 10vh;
  width: 10px;
  pointer-events: none;
}

.progress-track,
.progress-fill {
  position: absolute;
  left: 4px;
  bottom: 0;
  width: 1px;
}

.progress-track {
  top: 0;
  background: var(--grid-ink);
}

.progress-fill {
  height: 0%;
  background: var(--flame-gold);
}

.progress-flame {
  position: absolute;
  left: 2px;
  bottom: 0%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--flame-gold);
  box-shadow: 0 0 12px 5px rgba(255, 213, 128, 0.18);
  animation: flameDot 2s ease-in-out infinite;
}

.version-counter {
  position: fixed;
  z-index: 6;
  right: 2rem;
  bottom: 2rem;
  font-family: "Barlow Condensed", Arial, sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--dusty-silver);
  opacity: 0.8;
  transition: opacity 200ms ease;
}

.reveal-item {
  opacity: 0;
  transition: opacity 800ms var(--reveal-ease);
}

.reveal-item.is-visible {
  opacity: 1;
}

.prototype-illustration .shape {
  opacity: 0;
  transition: opacity 800ms var(--reveal-ease), transform 1200ms var(--reveal-ease);
}

.prototype-illustration.is-assembling .shape {
  opacity: 1;
  transform: translate(0, 0);
}

.scatter-a { transform: translate(-18px, 14px); transition-delay: 0ms; }
.scatter-b { transform: translate(20px, -16px); transition-delay: 150ms; }
.scatter-c { transform: translate(-12px, -20px); transition-delay: 300ms; }
.scatter-d { transform: translate(16px, 18px); transition-delay: 450ms; }
.scatter-e { transform: translate(-20px, 6px); transition-delay: 600ms; }
.scatter-f { transform: translate(10px, -18px); transition-delay: 750ms; }
.scatter-g { transform: translate(-14px, 20px); transition-delay: 900ms; }

.line-shape {
  transition-delay: 1050ms;
}

@keyframes outerFlicker {
  0%, 100% { transform: scaleY(0.9) rotate(-1deg); filter: hue-rotate(0deg); opacity: 0.54; }
  45% { transform: scaleY(1.15) rotate(2deg); filter: hue-rotate(15deg); opacity: 0.72; }
  70% { transform: scaleY(0.98) rotate(-2deg); filter: hue-rotate(8deg); opacity: 0.62; }
}

@keyframes innerFlicker {
  0%, 100% { transform: scaleY(1.06) rotate(1deg); opacity: 0.82; }
  50% { transform: scaleY(0.85) rotate(-1deg); opacity: 1; }
}

@keyframes glowPulse {
  0%, 100% { transform: scale(0.86); opacity: 0.08; }
  50% { transform: scale(1.08); opacity: 0.16; }
}

@keyframes flameDot {
  0%, 100% { transform: scale(0.82); opacity: 0.75; }
  50% { transform: scale(1.28); opacity: 1; }
}

@media (max-width: 768px) {
  .prototype-station {
    padding: 4rem 1.25rem;
  }

  .station-content,
  .station-reverse .station-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
  }

  .station-reverse .illustration-panel,
  .illustration-panel,
  .station-reverse .annotation-column,
  .annotation-column {
    grid-column: auto;
    grid-row: auto;
    width: 100%;
  }

  .illustration-panel {
    min-height: auto;
  }

  .prototype-illustration {
    width: 85vw;
  }

  .annotation-column {
    gap: 0.9rem;
    padding-left: 2rem;
  }

  .version-number {
    right: -6vw;
    font-size: clamp(4rem, 24vw, 7rem);
  }

  .maker-note {
    font-size: 16px;
  }

  .handwritten-label,
  .handwritten-label.rotate-right {
    transform: none;
  }

  .breathing-zone {
    min-height: 20vh;
  }

  .progress-candle {
    left: 0.65rem;
  }

  .version-counter {
    right: 1rem;
    bottom: 1rem;
  }
}