:root {
  --color-bg: #000000;
  --color-ink: #f4f1ec;
  --color-dim: rgba(244, 241, 236, 0.55);
  --color-faint: rgba(244, 241, 236, 0.25);
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-ui: "Space Grotesk", "Helvetica Neue", sans-serif;
}

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

html {
  scroll-behavior: auto;
}

body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-ui);
  font-weight: 300;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.is-loading {
  overflow: hidden;
}

/* ---------- WebGL canvas ---------- */
#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

/* ---------- Loader ---------- */
#loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
}

.loader-count {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(4rem, 14vw, 9rem);
  line-height: 1;
  background: linear-gradient(180deg, #fffcff 20%, #cfe0f5 85%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.loader-label {
  font-size: 0.7rem;
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: var(--color-dim);
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 1.6rem 2.2rem;
  mix-blend-mode: difference;
  opacity: 0;
}

.brand {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.5rem;
  color: var(--color-ink);
  text-decoration: none;
  letter-spacing: 0.04em;
}

.header-note {
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--color-dim);
}

/* ---------- HUD: chapter indicator + progress ---------- */
.hud {
  position: fixed;
  left: 2.2rem;
  bottom: 2rem;
  z-index: 20;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  opacity: 0;
}

.chapter-indicator {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
}

.chapter-num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.6rem;
  line-height: 1;
}

.chapter-name {
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--color-dim);
}

.progress-track {
  width: 9rem;
  height: 1px;
  background: var(--color-faint);
  position: relative;
  overflow: hidden;
}

.progress-fill {
  position: absolute;
  inset: 0;
  background: var(--color-ink);
  transform-origin: left center;
  transform: scaleX(0);
}

/* ---------- Journey panels ---------- */
#journey {
  position: relative;
  z-index: 10;
}

.panel {
  min-height: 160vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 clamp(1.5rem, 8vw, 8rem);
}

/* Hero */
.hero {
  min-height: 100vh;
  align-items: center;
  text-align: center;
  position: relative;
}

.hero-eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.5em;
  text-transform: uppercase;
  color: var(--color-dim);
  margin-bottom: 1.4rem;
}

.hero-title {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(5rem, 21vw, 19rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #fffcff 0% 30%, #dcebff 70% 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  padding: 0 0.1em 0.12em;
}

.hero-title .char {
  display: inline-block;
}

.hero-sub {
  font-size: clamp(0.85rem, 1.6vw, 1.15rem);
  letter-spacing: 0.18em;
  color: var(--color-dim);
  margin-top: 1.8rem;
}

.scroll-hint {
  position: absolute;
  bottom: 2.4rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.9rem;
  font-size: 0.62rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-dim);
  transition: opacity 0.6s ease;
}

.scroll-line {
  width: 1px;
  height: 3.2rem;
  background: linear-gradient(180deg, transparent, var(--color-ink));
  overflow: hidden;
  position: relative;
}

.scroll-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--color-bg);
  animation: scroll-line-sweep 2.2s ease-in-out infinite;
}

@keyframes scroll-line-sweep {
  0%   { transform: translateY(-100%); }
  55%  { transform: translateY(100%); }
  100% { transform: translateY(100%); }
}

/* Chapters */
.chapter-inner {
  max-width: 30rem;
  will-change: transform, opacity;
}

.chapter:nth-of-type(even) {
  align-items: flex-end;
}

.chapter:nth-of-type(even) .chapter-inner {
  text-align: right;
}

.chapter-eyebrow {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: var(--color-dim);
  margin-bottom: 1.2rem;
}

.chapter h2,
.finale h2 {
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2.6rem, 6.5vw, 5.5rem);
  line-height: 1.02;
  margin-bottom: 1.4rem;
  text-shadow: 0 0 24px rgba(0, 0, 0, 0.9), 0 0 60px rgba(0, 0, 0, 0.7);
}

.chapter p {
  font-size: clamp(0.95rem, 1.4vw, 1.1rem);
  line-height: 1.75;
  color: var(--color-dim);
  letter-spacing: 0.02em;
}

/* Finale */
.finale {
  min-height: 130vh;
  align-items: center;
  text-align: center;
}

.finale .chapter-inner {
  max-width: 44rem;
}

.restart {
  margin-top: 2.4rem;
  font-family: var(--font-ui);
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-ink);
  background: transparent;
  border: 1px solid var(--color-faint);
  border-radius: 999px;
  padding: 1rem 2.6rem;
  cursor: pointer;
  transition: border-color 0.4s ease, background 0.4s ease, color 0.4s ease;
}

.restart:hover {
  border-color: var(--color-ink);
  background: var(--color-ink);
  color: var(--color-bg);
}

/* ---------- Responsive ---------- */
@media (max-width: 767px) {
  .site-header {
    padding: 1.2rem 1.4rem;
  }

  .hud {
    left: 1.4rem;
    bottom: 1.4rem;
  }

  .progress-track {
    width: 6rem;
  }

  .panel {
    min-height: 140vh;
  }

  .chapter:nth-of-type(even) {
    align-items: flex-start;
  }

  .chapter:nth-of-type(even) .chapter-inner {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  .scroll-line::after {
    animation: none;
  }
}