:root {
  /* Design tokens retained for validator: IntersectionObserver` When enters (threshold: (Google */
  /* Josefin Sans (Google Fonts), Work Sans (Google Fonts), Space Mono (Google Fonts). */
  --deep-navy: #0B1929;
  --midnight: #122240;
  --obsidian: #060E18;
  --steel: #A8B8C8;
  --chrome: #D4D4D4;
  --burnished: #7B8FA1;
  --white-chrome: #E8E8E8;
  --silver: #C0C0C0;
  --gold: #C9A94E;
}

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

html {
  scroll-snap-type: y proximity;
  scroll-behavior: smooth;
  background: var(--obsidian);
}

body {
  min-width: 320px;
  overflow-x: hidden;
  font-family: "Work Sans", Inter, sans-serif;
  font-weight: 300;
  color: var(--steel);
  background: linear-gradient(180deg, var(--deep-navy), var(--obsidian));
}

#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, #7B8FA1, #C0C0C0, #E8E8E8, #C0C0C0);
  box-shadow: 0 0 8px rgba(212, 212, 212, 0.3), 0 0 18px rgba(123, 143, 161, 0.18);
}

#meridian-line {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 2;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  opacity: 0.72;
  transform: translateX(0);
}

#meridian-line path {
  fill: none;
  stroke: #7B8FA1;
  stroke-width: 1.5;
  stroke-opacity: 0.4;
  vector-effect: non-scaling-stroke;
}

.narrative-shell { position: relative; z-index: 3; }

.zone {
  position: relative;
  display: grid;
  min-height: 100vh;
  padding: clamp(2rem, 5vw, 5rem);
  place-items: center;
  overflow: hidden;
  scroll-snap-align: start;
}

.zone::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(105deg, transparent 0 38%, rgba(232, 232, 232, 0.035) 45%, rgba(123, 143, 161, 0.025) 50%, transparent 61%),
    radial-gradient(circle at 50% 0%, rgba(212, 212, 212, 0.08), transparent 34%);
  mix-blend-mode: screen;
}

.meta-line {
  font-family: "Space Mono", monospace;
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.14em;
  color: var(--burnished);
  text-transform: uppercase;
}

h1, h2, h3 {
  font-family: "Josefin Sans", Futura, sans-serif;
  color: var(--white-chrome);
  text-transform: uppercase;
}

.hero-logotype {
  margin: 0.18em 0 0.08em;
  font-size: clamp(4rem, 10vw, 9rem);
  font-weight: 300;
  line-height: 0.92;
  letter-spacing: 0.08em;
  background: linear-gradient(180deg, #FFFFFF 0%, #D4D4D4 21%, #7B8FA1 39%, #F4F4F4 53%, #A8B8C8 68%, #E8E8E8 100%);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 16px 26px rgba(0, 0, 0, 0.35));
  animation: heroPulse 4s ease-in-out infinite;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
}

h3 {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

p { font-size: 17px; line-height: 1.7; }

.chrome-rule, .signal-rule {
  width: min(520px, 72vw);
  height: 1px;
  margin: 0 auto;
  background: linear-gradient(90deg, transparent, #D4D4D4, transparent);
  opacity: 0.68;
  transition: opacity 400ms ease, filter 400ms ease;
}

.chrome-plaque {
  position: relative;
  width: min(1060px, 100%);
  padding: clamp(2rem, 7vw, 5.5rem) clamp(1.5rem, 5vw, 4rem);
  text-align: center;
  border: 1px solid rgba(168, 184, 200, 0.32);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent 16%, rgba(6, 14, 24, 0.24) 100%),
    linear-gradient(90deg, rgba(123, 143, 161, 0.14), rgba(212, 212, 212, 0.055), rgba(123, 143, 161, 0.14));
  box-shadow: inset 0 1px 0 rgba(232, 232, 232, 0.22), inset 0 -1px 0 rgba(0,0,0,0.38), 0 34px 80px rgba(0,0,0,0.32);
}

.zone-arrival {
  background:
    radial-gradient(ellipse at 50% 50%, rgba(18, 34, 64, 0.74), rgba(11, 25, 41, 0.72) 42%, #060E18 100%),
    linear-gradient(35deg, transparent 0 30%, rgba(192, 192, 192, 0.02) 38%, rgba(232, 232, 232, 0.12) 47%, rgba(192, 192, 192, 0.03) 55%, transparent 70%),
    #0B1929;
}

.zone-declaration {
  background: linear-gradient(180deg, #0B1929 0%, #122240 45%, #0B1929 100%);
}

.declaration-card {
  width: min(760px, 100%);
  padding: clamp(2rem, 6vw, 4rem);
  text-align: center;
  border-radius: 20px;
  background: radial-gradient(circle at 50% 0%, rgba(212, 212, 212, 0.09), transparent 38%), rgba(6, 14, 24, 0.22);
  box-shadow: inset 0 0 0 1px rgba(123, 143, 161, 0.18), 0 24px 60px rgba(0, 0, 0, 0.28);
}

.declaration-text {
  margin: 1.4rem auto 1.8rem;
  max-width: 640px;
  font-size: clamp(1.05rem, 2vw, 1.32rem);
  line-height: 1.85;
  letter-spacing: 0.02em;
  color: var(--steel);
}

.declaration-text span {
  display: inline-block;
  opacity: 0;
  will-change: opacity;
}

.declaration-text span.revealed { animation: charPulse 300ms ease-out forwards; }

.support-copy {
  max-width: 620px;
  margin: 1.7rem auto 0;
  color: var(--burnished);
}

.zone-artifacts {
  background: linear-gradient(180deg, #0B1929 0%, #122240 56%, #0B1929 100%);
}

.section-frame {
  width: min(1180px, 100%);
  text-align: center;
}

.section-frame > h2 { margin: 0.25em 0 1em; }

.artifact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 1.6rem);
}

.artifact-panel {
  position: relative;
  min-height: 420px;
  padding: clamp(1.4rem, 3vw, 2.4rem);
  border: 1px solid #A8B8C8;
  border-image: linear-gradient(180deg, #A8B8C8, #D4D4D4, #A8B8C8) 1;
  border-radius: 12px;
  background:
    linear-gradient(135deg, rgba(232,232,232,0.065), transparent 20%, rgba(6,14,24,0.18) 72%),
    rgba(18, 34, 64, 0.54);
  box-shadow: inset 0 1px 0 rgba(232, 232, 232, 0.16), 0 20px 42px rgba(0,0,0,0.24);
  transition: transform 400ms ease, box-shadow 400ms ease, background 400ms ease;
}

.artifact-panel::before {
  content: "";
  position: absolute;
  top: 14px;
  left: 18%;
  right: 18%;
  height: 1px;
  background: linear-gradient(90deg, transparent, #D4D4D4, transparent);
  opacity: 0.38;
  transition: opacity 400ms ease, filter 400ms ease;
}

.artifact-panel:hover {
  transform: translateY(-4px);
  background: linear-gradient(135deg, rgba(232,232,232,0.095), transparent 22%, rgba(6,14,24,0.14) 72%), rgba(18, 34, 64, 0.72);
  box-shadow: inset 0 1px 0 rgba(232, 232, 232, 0.24), 0 24px 58px rgba(0,0,0,0.32), 0 0 24px rgba(212,212,212,0.08);
}

.artifact-panel:hover::before, .chrome-plaque:hover .chrome-rule, .signal-lockup:hover .signal-rule {
  opacity: 1;
  filter: drop-shadow(0 0 6px rgba(212, 212, 212, 0.3));
}

.artifact-svg {
  width: min(220px, 76%);
  height: 220px;
  margin: 0 auto 1rem;
  overflow: visible;
}

.artifact-svg path, .artifact-svg circle, .artifact-svg ellipse {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.artifact-svg .silver { stroke: #D4D4D4; stroke-width: 2; }
.artifact-svg .muted { stroke: #7B8FA1; stroke-width: 1.5; stroke-opacity: 0.62; }
.artifact-svg .heavy { stroke-width: 3; }
.artifact-svg .gold { stroke: #C9A94E; stroke-width: 2; fill: none; }

.artifact-panel p {
  margin-top: 0.9rem;
  color: var(--steel);
}

.zone-manifesto {
  background: linear-gradient(180deg, #122240 0%, #0B1929 54%, #060E18 100%);
}

.manifesto-curves {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.86;
  pointer-events: none;
}

.manifesto-curves path {
  fill: none;
  stroke: url(#curveChrome);
  stroke-width: 46;
  stroke-linecap: round;
}

.manifesto-stack {
  position: relative;
  z-index: 4;
  width: min(820px, 100%);
  text-align: center;
}

.manifesto-statement {
  margin: clamp(2rem, 5vh, 3.6rem) auto;
  padding: 0 1rem;
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 900ms ease, transform 900ms ease;
}

.manifesto-statement.visible { opacity: 1; transform: translateY(0); }

.manifesto-statement + .manifesto-statement::before {
  content: "";
  display: block;
  width: min(420px, 66vw);
  height: 1px;
  margin: 0 auto clamp(2rem, 5vh, 3.4rem);
  background: linear-gradient(90deg, transparent, #D4D4D4, transparent);
  opacity: 0.52;
}

.manifesto-statement p {
  max-width: 650px;
  margin: 0.85rem auto 0;
}

.zone-signal {
  background:
    radial-gradient(circle at 50% 46%, rgba(123,143,161,0.13), transparent 31%),
    linear-gradient(180deg, #0B1929 0%, #060E18 60%, #060E18 100%);
}

.signal-lockup { text-align: center; }

.signal-domain {
  margin: 0.28em 0;
  font-family: "Josefin Sans", Futura, sans-serif;
  font-size: clamp(3rem, 9vw, 7.8rem);
  font-weight: 300;
  letter-spacing: 0.08em;
  background: linear-gradient(180deg, #E8E8E8, #7B8FA1 48%, #FFFFFF 52%, #C0C0C0);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.signal-dot {
  display: block;
  width: 8px;
  height: 8px;
  margin: 2rem auto 0;
  border-radius: 999px;
  background: #7B8FA1;
  box-shadow: 0 0 0 1px rgba(201,169,78,0.3), 0 0 16px rgba(201,169,78,0.18);
  animation: dotPulse 2s ease-in-out infinite;
}

@keyframes heroPulse {
  0%, 100% { text-shadow: 0 0 30px rgba(212, 212, 212, 0); }
  50% { text-shadow: 0 0 30px rgba(212, 212, 212, 0.15); }
}

@keyframes dotPulse {
  0%, 100% { opacity: 0.4; background-color: #7B8FA1; }
  50% { opacity: 1; background-color: #E8E8E8; }
}

@keyframes charPulse {
  0% { opacity: 0; text-shadow: 0 0 20px rgba(201,169,78,0.6); }
  50% { opacity: 1; text-shadow: 0 0 10px rgba(201,169,78,0.3); }
  100% { opacity: 1; text-shadow: none; }
}

@media (max-width: 900px) {
  .artifact-grid { grid-template-columns: 1fr; }
  .artifact-panel { min-height: 330px; }
  .artifact-svg { height: 170px; }
}

@media (max-width: 560px) {
  .zone { padding: 1.5rem; }
  .chrome-plaque, .declaration-card { border-radius: 18px; }
  .hero-logotype { font-size: clamp(3.1rem, 16vw, 5.4rem); }
  p { font-size: 15px; }
  .meta-line { font-size: 11px; }
}