:root {
  /* DESIGN font tokens: Inter** (Google Fonts */
  --obsidian: #050505;
  --ink: #111111;
  --bone: #F4F0E6;
  --silver: #BFC3C7;
  --smoke: #5D5D5D;
  --vermilion: #B11226;
  --display: 'Poiret One', cursive;
  --serif-jp: 'Noto Serif JP', serif;
  --interface: 'Inter', sans-serif;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100vh;
  color: var(--bone);
  font-family: var(--serif-jp);
  background: var(--obsidian);
  overflow-x: hidden;
}

.lacquer-field {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(circle at 76% 12%, rgba(191, 195, 199, 0.12), transparent 22vw),
    radial-gradient(circle at 35% 78%, rgba(177, 18, 38, 0.08), transparent 26vw),
    linear-gradient(102deg, rgba(244, 240, 230, 0.055), transparent 19%, transparent 72%, rgba(191, 195, 199, 0.035)),
    repeating-linear-gradient(90deg, rgba(191, 195, 199, 0.025) 0 1px, transparent 1px 84px),
    var(--obsidian);
}

.lacquer-field::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, rgba(5, 5, 5, 0.56)), radial-gradient(ellipse at center, transparent 42%, rgba(0,0,0,.58));
  box-shadow: inset 0 0 140px rgba(0,0,0,.92), inset 0 0 42px rgba(244,240,230,.035);
}

.particle-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 2;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: var(--silver);
  opacity: .52;
  transform: translate3d(0,0,0);
  box-shadow: 0 0 8px rgba(191,195,199,.35);
}

.lens-flare {
  position: fixed;
  width: 150vw;
  height: 18vh;
  left: -30vw;
  top: 43vh;
  z-index: 4;
  pointer-events: none;
  opacity: 0;
  transform: translateX(-18vw) rotate(-18deg);
  background:
    radial-gradient(circle at 72% 50%, rgba(244,240,230,.18), transparent 4%),
    radial-gradient(circle at 58% 50%, rgba(191,195,199,.12), transparent 7%),
    linear-gradient(90deg, transparent 3%, rgba(244,240,230,.04), rgba(244,240,230,.82) 50%, rgba(191,195,199,.1), transparent 92%);
  filter: blur(.3px);
}

.lens-flare.sweep { animation: flareSweep 1550ms cubic-bezier(.19,1,.22,1); }

@keyframes flareSweep {
  0% { opacity: 0; transform: translateX(-38vw) rotate(-18deg); }
  22% { opacity: .62; }
  100% { opacity: 0; transform: translateX(38vw) rotate(-18deg); }
}

.ceremonial-sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: 21vw;
  min-width: 240px;
  z-index: 5;
  background: linear-gradient(180deg, rgba(17,17,17,.96), rgba(5,5,5,.94));
  border-right: 1px solid rgba(191,195,199,.28);
  box-shadow: inset -28px 0 70px rgba(0,0,0,.65), 24px 0 80px rgba(0,0,0,.36);
}

.sidebar-shell {
  position: relative;
  height: 100%;
  display: grid;
  grid-template-rows: 1fr auto 1fr;
  place-items: center;
  padding: 5vh 2vw;
}

.sidebar-shell::before {
  content: "";
  position: absolute;
  top: 4vh;
  bottom: 4vh;
  right: 3.4vw;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--silver) 12%, var(--silver) 88%, transparent);
  opacity: .62;
}

.vertical-wordmark {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--display);
  font-size: clamp(1.65rem, 2.35vw, 3rem);
  letter-spacing: .32em;
  color: var(--bone);
  text-shadow: 0 0 22px rgba(244,240,230,.12);
}

.compass-rose {
  position: absolute;
  top: 5vh;
  left: 2.1vw;
  width: 64px;
  opacity: .72;
}

.compass-rose svg, .symbol svg { width: 100%; height: auto; overflow: visible; }

svg path, svg circle, svg line {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.2;
  vector-effect: non-scaling-stroke;
}

.compass-rose svg { color: var(--silver); }
.compass-rose path:nth-of-type(1) { fill: rgba(191,195,199,.045); }

.route-instrument {
  position: absolute;
  right: 2.3vw;
  top: 20vh;
  bottom: 16vh;
  width: 90px;
}

.route-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 12px;
  width: 1px;
  background: rgba(191,195,199,.18);
}

.route-line span {
  display: block;
  width: 100%;
  height: 0%;
  background: linear-gradient(180deg, var(--bone), var(--silver), var(--vermilion));
  box-shadow: 0 0 14px rgba(191,195,199,.42);
  transition: height 420ms cubic-bezier(.25,.8,.25,1);
}

.chapter-dots {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.chapter-dot {
  display: grid;
  grid-template-columns: 24px 1fr;
  align-items: center;
  gap: 14px;
  color: var(--smoke);
  text-decoration: none;
  font-family: var(--interface);
  font-size: .62rem;
  text-transform: uppercase;
  letter-spacing: .22em;
  transition: color 650ms cubic-bezier(.19,1,.22,1), transform 650ms cubic-bezier(.19,1,.22,1);
}

.chapter-dot span {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid rgba(191,195,199,.35);
  border-radius: 50%;
  background: var(--ink);
  font-family: var(--display);
  color: var(--silver);
}

.chapter-dot em { font-style: normal; opacity: .82; }
.chapter-dot.active { color: var(--bone); transform: translateX(-5px); }
.chapter-dot.active span { border-color: var(--vermilion); background: var(--vermilion); color: var(--bone); box-shadow: 0 0 28px rgba(177,18,38,.62); }

.sidebar-caption {
  align-self: end;
  justify-self: start;
  font-family: var(--interface);
  color: var(--smoke);
  font-size: .65rem;
  letter-spacing: .24em;
  text-transform: uppercase;
}

.procession {
  position: relative;
  z-index: 1;
  margin-left: 21vw;
}

.panel {
  min-height: 100vh;
  position: relative;
  display: grid;
  place-items: center;
  padding: 9vh 8vw;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid rgba(191,195,199,.13);
}

.panel::before {
  content: "";
  position: absolute;
  inset: 8vh 6vw;
  border-top: 1px solid rgba(191,195,199,.14);
  border-bottom: 1px solid rgba(191,195,199,.09);
  background: linear-gradient(90deg, transparent, rgba(244,240,230,.018), transparent);
  z-index: -2;
}

.panel::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -3;
  background:
    repeating-linear-gradient(0deg, transparent 0 28px, rgba(191,195,199,.018) 29px 30px, transparent 31px 92px),
    radial-gradient(circle at var(--glow-x, 70%) var(--glow-y, 40%), rgba(191,195,199,.12), transparent 30vw);
  opacity: .78;
}

.panel-number {
  position: absolute;
  top: 11vh;
  right: 7vw;
  font-family: var(--serif-jp);
  font-size: clamp(3rem, 10vw, 9rem);
  color: rgba(191,195,199,.07);
  line-height: 1;
}

.copy-block {
  position: relative;
  width: min(900px, 78vw);
  transform: translateY(28px);
  opacity: .35;
  transition: opacity 1100ms cubic-bezier(.19,1,.22,1), transform 1100ms cubic-bezier(.19,1,.22,1);
}

.panel.active .copy-block { opacity: 1; transform: translateY(0); }
.offset-right { margin-left: 19vw; }
.offset-left { margin-right: 14vw; }
.centered { text-align: center; }

.kicker {
  margin: 0 0 1.2rem;
  color: var(--silver);
  font-family: var(--serif-jp);
  font-size: clamp(.78rem, 1vw, 1.05rem);
  letter-spacing: .34em;
}

h1, h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: .12em;
  line-height: .86;
  color: var(--bone);
  text-shadow: 0 0 34px rgba(244,240,230,.12);
}

h1 { font-size: clamp(4rem, 11vw, 10rem); }
h2 { font-size: clamp(3.2rem, 8vw, 8rem); }

.reveal-title {
  position: relative;
  display: inline-block;
  color: transparent;
  background: linear-gradient(90deg, var(--bone), var(--silver), var(--bone));
  -webkit-background-clip: text;
  background-clip: text;
}

.reveal-title::before {
  content: "";
  position: absolute;
  inset: .12em 0 .08em;
  background: repeating-linear-gradient(180deg, rgba(244,240,230,.78) 0 12px, transparent 12px 22px);
  transform-origin: left;
  transform: scaleX(1);
  animation: shojiReveal 1800ms cubic-bezier(.19,1,.22,1) forwards;
  box-shadow: 0 0 22px rgba(244,240,230,.12);
}

.panel.active .reveal-title::before { animation: shojiReveal 1800ms cubic-bezier(.19,1,.22,1) forwards; }

@keyframes shojiReveal {
  0%, 24% { transform: scaleX(1); opacity: .72; }
  100% { transform: scaleX(0); opacity: 0; }
}

.poem {
  max-width: 640px;
  margin: 1.5rem 0 0;
  color: var(--silver);
  font-size: clamp(1rem, 1.35vw, 1.3rem);
  line-height: 1.85;
  letter-spacing: .05em;
}

.centered .poem { margin-left: auto; margin-right: auto; }

.symbol {
  position: absolute;
  color: var(--silver);
  opacity: .38;
  filter: drop-shadow(0 0 24px rgba(191,195,199,.1));
  transition: opacity 1200ms cubic-bezier(.19,1,.22,1), transform 1500ms cubic-bezier(.19,1,.22,1);
}

.panel.active .symbol { opacity: .72; transform: translate3d(0,0,0) scale(1); }

.ship-symbol { width: min(62vw, 780px); bottom: 11vh; right: 7vw; transform: translateX(44px) scale(.98); }
.ship-symbol .ship { fill: rgba(191,195,199,.045); }
.star-map { width: min(48vw, 620px); left: 8vw; top: 16vh; transform: rotate(-8deg) scale(.92); }
.panel.active .star-map { transform: rotate(0deg) scale(1); }
.mirror-symbol { width: min(43vw, 560px); right: 10vw; top: 18vh; transform: translateY(35px) scale(.94); }
.mirror-symbol .oath-mark { stroke: var(--vermilion); stroke-width: 2; }
.gate-symbol { width: min(58vw, 760px); right: 5vw; bottom: 7vh; transform: translateY(55px); }
.gate-symbol .fan { opacity: .34; }
.horizon-symbol { width: min(66vw, 820px); top: 12vh; left: 50%; transform: translateX(-50%) translateY(34px); }
.panel.active .horizon-symbol { transform: translateX(-50%) translateY(0); }
.horizon-symbol circle { fill: rgba(244,240,230,.035); }
.horizon-symbol .gloss { stroke: var(--bone); opacity: .56; }

.vermilion-seal {
  position: absolute;
  right: 10vw;
  bottom: 13vh;
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  border: 2px solid var(--vermilion);
  color: var(--vermilion);
  font-family: var(--serif-jp);
  font-size: 2.2rem;
  transform: rotate(-8deg);
  box-shadow: inset 0 0 18px rgba(177,18,38,.16), 0 0 32px rgba(177,18,38,.18);
}

@media (max-width: 900px) {
  .ceremonial-sidebar {
    width: 100%;
    min-width: 0;
    height: 82px;
    right: 0;
    bottom: auto;
    border-right: 0;
    border-bottom: 1px solid rgba(191,195,199,.24);
  }

  .sidebar-shell {
    height: 82px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
  }

  .sidebar-shell::before { left: 20px; right: 20px; top: auto; bottom: 14px; width: auto; height: 1px; }
  .vertical-wordmark { writing-mode: horizontal-tb; font-size: 1.25rem; letter-spacing: .22em; }
  .compass-rose { position: static; width: 42px; }
  .route-instrument { position: static; width: 42vw; height: 38px; }
  .route-line { top: auto; bottom: 6px; left: 0; right: 0; height: 1px; width: auto; }
  .route-line span { width: 0%; height: 100%; transition: width 420ms cubic-bezier(.25,.8,.25,1); }
  .chapter-dots { flex-direction: row; align-items: end; }
  .chapter-dot { display: block; }
  .chapter-dot span { width: 18px; height: 18px; font-size: .58rem; }
  .chapter-dot em, .sidebar-caption { display: none; }
  .procession { margin-left: 0; }
  .panel { padding: 15vh 7vw 9vh; }
  .copy-block { width: 100%; }
  .offset-right, .offset-left { margin: 0; }
  .symbol { opacity: .3; }
  .ship-symbol, .star-map, .mirror-symbol, .gate-symbol, .horizon-symbol { width: 92vw; left: 4vw; right: auto; top: auto; bottom: 12vh; }
  .vermilion-seal { right: 7vw; bottom: 8vh; width: 58px; height: 58px; font-size: 1.7rem; }
}