:root {
  --bg: #07090c;
  --bg-band: #0b0e12;
  --text: #f2f3f5;
  --text-dim: #b9bec6;
  --line: rgba(255, 255, 255, 0.22);
  --line-strong: rgba(255, 255, 255, 0.75);
  --gutter: clamp(16px, 5vw, 64px);
  --font: "Exo 2", "Segoe UI", system-ui, sans-serif;
  color-scheme: dark;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

h1, h2, h3 {
  margin: 0;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  line-height: 1.08;
}

.rule {
  width: 36px;
  height: 1px;
  margin: 18px 0;
  border: 0;
  background: var(--line-strong);
}
.rule-short { width: 28px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 10px 22px;
  border: 1px solid var(--line-strong);
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  transition: background 0.25s, color 0.25s;
}
.btn:hover,
.btn:focus-visible { background: var(--text); color: var(--bg); }
.btn-small { padding: 7px 26px; border-radius: 6px; font-size: 12px; }

/* Header */

.site-header {
  position: absolute;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 26px var(--gutter);
}

.brand { display: flex; align-items: center; gap: 16px; }
.brand-mark { width: 42px; height: 42px; color: var(--text); }
.brand-text {
  padding-left: 14px;
  border-left: 1px solid var(--line);
  font-size: 11px;
  line-height: 1.4;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  gap: clamp(20px, 4vw, 42px);
  margin-left: auto;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.main-nav a { opacity: 0.85; transition: opacity 0.2s; }
.main-nav a:hover { opacity: 1; }

/* Hero */

.hero {
  position: relative;
  min-height: max(100svh, 720px);
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 140px var(--gutter) 200px;
}

.hero-image {
  position: absolute;
  inset: 0 0 0 30%;
  background: url(assets/hero.jpg) center 20% / cover no-repeat;
}
.hero-image::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, var(--bg) 0%, rgba(7, 9, 12, 0.6) 22%, transparent 50%),
    linear-gradient(0deg, var(--bg) 0%, transparent 18%),
    linear-gradient(180deg, rgba(7, 9, 12, 0.7) 0%, transparent 18%);
}

.hero-content { position: relative; max-width: 410px; }

.eyebrow {
  margin: 0 0 6px;
  font-size: 17px;
  letter-spacing: 0.18em;
}

.hero h1 { font-size: clamp(44px, 6vw, 64px); letter-spacing: 0.03em; }

.tagline {
  margin: 28px 0 0;
  font-size: 19px;
  font-weight: 300;
  line-height: 1.35;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.lead { margin: 0 0 40px; font-size: 14px; color: var(--text-dim); }

.chapter-index {
  position: absolute;
  left: calc(var(--gutter) - 26px);
  bottom: 40px;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
  border-left: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.chapter-index li + li { margin-top: 18px; }
.chapter-index a { display: block; line-height: 1.4; opacity: 0.8; }
.chapter-index a:hover { opacity: 1; }
.chapter-index span { display: block; }

/* Image bands */

.band {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 32px;
  min-height: 200px;
  padding: 26px var(--gutter);
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--bg-band);
}

.band-image {
  position: absolute;
  inset: 0 12% 0 36%;
  background-position: center;
  background-size: cover;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 22%, #000 78%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 22%, #000 78%, transparent);
}

.band-text,
.band-aside { position: relative; }

.band-text {
  max-width: 360px;
  padding-left: 26px;
  border-left: 1px solid var(--line);
}
.band-text h2 { font-size: clamp(24px, 3vw, 28px); }
.band-text p { margin: 14px 0 0; font-size: 14px; color: var(--text-dim); }

.eyebrow-plain { margin: 0 0 4px !important; font-size: 13px !important; letter-spacing: 0.14em; }

.band-aside {
  max-width: 220px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.band-aside p { margin: 0; }
.band-aside-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 110px;
}
.band-aside-center .rule { margin: 14px auto; }
.band-aside strong { font-size: 14px; letter-spacing: 0.1em; }
.aside-mark { width: 30px; height: 30px; margin-bottom: 14px; }

.band-tunnel { min-height: 150px; }
.band-tunnel .band-image { inset: 0 26% 0 30%; }
.monologue { line-height: 1.55; }

.band-mother { min-height: 180px; }
.band-mother .band-image { inset: 0 12% 0 28%; }
.band-mother h2 { font-size: clamp(26px, 3.2vw, 30px); }
.band-mother .tagline { font-size: 16px; color: var(--text); }

.id-tag { padding-left: 22px; border-left: 1px solid var(--line); }
.barcode {
  width: 58px;
  height: 18px;
  margin: 10px 0 14px;
  background: repeating-linear-gradient(90deg,
    var(--text) 0 1px, transparent 1px 3px,
    var(--text) 3px 5px, transparent 5px 6px,
    var(--text) 6px 7px, transparent 7px 9px);
}

/* Artifacts */

.artifacts {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 24px;
  padding: 12px var(--gutter) 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.artifacts-title {
  align-self: start;
  margin-top: 12px;
  padding-left: 26px;
  border-left: 1px solid var(--line);
  font-size: 18px;
  line-height: 1.4;
}

.artifact-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.artifact {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.015);
  transition: border-color 0.25s;
}
.artifact:hover { border-color: var(--line-strong); }
.artifact header {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 4px 14px;
  border-bottom: 1px solid var(--line);
}
.artifact-no { font-size: 17px; font-weight: 300; letter-spacing: 0.06em; }
.artifact h3 { font-size: 12px; letter-spacing: 0.05em; }
.artifact img {
  width: 100%;
  aspect-ratio: 235 / 134;
  object-fit: cover;
}
.artifact p {
  margin: 0;
  padding: 8px 12px 6px;
  border-top: 1px solid var(--line);
  font-size: 11.5px;
  line-height: 1.4;
  color: var(--text-dim);
}

.band-world .band-image { background-image: url(assets/world.jpg); }
.band-tunnel .band-image { background-image: url(assets/tunnel.jpg); }
.band-mother .band-image { background-image: url(assets/mother.jpg); }

.id-code { display: flex; flex-direction: column; align-items: center; }

.menu-toggle { display: none; }

/* Mobile */

@media (max-width: 900px) {
  :root { --gutter: 28px; }

  .site-header { padding: 30px var(--gutter); gap: 16px; }
  .site-header .btn-small { display: none; }
  .brand-mark { width: 40px; height: 40px; }

  .menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 7px;
    width: 40px;
    height: 40px;
    margin-left: auto;
    padding: 0 4px;
    border: 0;
    background: none;
    cursor: pointer;
  }
  .menu-toggle span {
    height: 1.5px;
    background: var(--text);
    transition: transform 0.25s, opacity 0.25s;
  }
  .nav-open .menu-toggle span:nth-child(1) { transform: translateY(8.5px) rotate(45deg); }
  .nav-open .menu-toggle span:nth-child(2) { opacity: 0; }
  .nav-open .menu-toggle span:nth-child(3) { transform: translateY(-8.5px) rotate(-45deg); }

  .main-nav {
    position: absolute;
    top: 100%;
    left: var(--gutter);
    right: var(--gutter);
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 6px 22px;
    border: 1px solid var(--line);
    background: rgba(7, 9, 12, 0.94);
    font-size: 14px;
  }
  .nav-open .main-nav { display: flex; }
  .main-nav a { padding: 14px 0; }
  .main-nav a + a { border-top: 1px solid var(--line); }

  .hero {
    --hero-image-height: min(217vw, 980px);
    display: block;
    min-height: 0;
    padding: calc(var(--hero-image-height) - 70px) var(--gutter) 30px;
  }
  .hero-image {
    inset: 0 0 auto;
    height: var(--hero-image-height);
    background-image: url(assets/hero-mobile.jpg);
    background-position: center top;
  }
  .hero-image::after {
    background:
      linear-gradient(0deg, var(--bg) 0%, rgba(7, 9, 12, 0.55) 14%, transparent 34%),
      linear-gradient(180deg, rgba(7, 9, 12, 0.55) 0%, transparent 14%);
  }
  .hero-content { max-width: none; }
  .hero h1 { font-size: clamp(44px, 13vw, 64px); }
  .hero h1::after {
    content: "";
    display: block;
    width: 36px;
    height: 1px;
    margin-top: 18px;
    background: var(--line-strong);
  }
  .tagline { margin-top: 18px; }
  .lead { font-size: 15px; }
  .hero .btn {
    justify-content: space-between;
    width: 100%;
    max-width: 330px;
    padding: 13px 26px;
    font-size: 15px;
  }

  .chapter-index {
    position: relative;
    left: auto;
    bottom: auto;
    margin-top: 32px;
    font-size: 13px;
  }

  .band {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    min-height: 0;
    padding: 0;
  }
  .band-image,
  .band-tunnel .band-image,
  .band-mother .band-image {
    position: relative;
    inset: auto;
    margin: 0;
    background-position: center;
    -webkit-mask-image: none;
    mask-image: none;
  }
  .band-text { max-width: none; }
  .band-text h2 { font-size: clamp(24px, 7.5vw, 30px); }
  .band-text p { font-size: 15px; }
  .band-aside { max-width: none; padding: 0 var(--gutter); font-size: 13px; }

  .band-world { padding-top: 28px; }
  .band-world .band-text { display: contents; }
  .band-world .band-heading {
    order: 1;
    margin: 0 var(--gutter);
  }
  .band-world .band-heading h2 { margin-top: 2px; }
  .band-world .band-image {
    order: 2;
    aspect-ratio: 356 / 160;
    margin-top: -24px;
    background-image: url(assets/world-mobile.jpg);
    -webkit-mask-image: linear-gradient(180deg, transparent, #000 25%, #000 75%, transparent);
    mask-image: linear-gradient(180deg, transparent, #000 25%, #000 75%, transparent);
  }
  .band-world .band-body { order: 3; margin: 0 var(--gutter); color: var(--text); }
  .band-world .band-aside {
    order: 4;
    display: grid;
    grid-template-columns: 1fr auto auto 1fr;
    align-items: center;
    column-gap: 16px;
    padding-bottom: 28px;
  }
  .band-world .band-aside::before {
    content: "";
    grid-column: 1 / -1;
    justify-self: start;
    width: 36px;
    height: 1px;
    margin: 22px 0 18px;
    background: var(--line-strong);
  }
  .band-world .aside-mark { grid-column: 2; width: 40px; height: 40px; margin: 0; }
  .band-world .band-aside p {
    grid-column: 3;
    max-width: 90px;
    padding-left: 14px;
    border-left: 1px solid var(--line);
    font-size: 11px;
    text-align: left;
  }
  .band-world .band-aside .rule { display: none; }
  .band-world .band-aside strong { grid-column: 2 / 4; justify-self: center; margin-top: 12px; }

  .band-heading,
  .band-tunnel .band-text,
  .artifacts-title {
    padding-left: 22px;
    border-left: 1px solid var(--line);
  }

  .band-tunnel { padding-top: 34px; }
  .band-tunnel .band-text { order: 1; margin: 0 var(--gutter) 26px; }
  .band-tunnel .band-image {
    order: 2;
    aspect-ratio: 356 / 262;
    background-image: url(assets/tunnel-mobile.jpg);
  }
  .band-tunnel .band-aside {
    order: 3;
    position: relative;
    margin: 30px var(--gutter);
    padding: 6px 30px;
  }
  .band-tunnel .band-aside::before,
  .band-tunnel .band-aside::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 8px;
    border: 1px solid var(--line-strong);
  }
  .band-tunnel .band-aside::before { left: 0; border-right: 0; }
  .band-tunnel .band-aside::after { right: 0; border-left: 0; }
  .band-tunnel .band-aside .rule { display: none; }

  .artifacts {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 34px var(--gutter);
  }
  .artifacts-title { margin: 0; font-size: clamp(22px, 6.5vw, 26px); line-height: 1.3; }
  .artifact-grid { grid-template-columns: 1fr; gap: 16px; }
  .artifact header { padding: 6px 14px; }
  .artifact-no {
    padding-right: 20px;
    border-right: 1px solid var(--line);
    font-size: 20px;
  }
  .artifact h3 { font-size: 14px; }
  .artifact img { aspect-ratio: 300 / 145; }
  .artifact p { padding: 10px 22px 12px; font-size: 14px; border-top: 0; }

  .band-mother { padding-bottom: 30px; }
  .band-mother .band-image {
    aspect-ratio: 356 / 182;
    background-image: url(assets/mother-mobile.jpg);
    -webkit-mask-image: linear-gradient(180deg, #000 60%, transparent);
    mask-image: linear-gradient(180deg, #000 60%, transparent);
  }
  .band-mother .band-text { margin: -20px var(--gutter) 0; padding: 0; border: 0; }
  .band-mother h2 { font-size: clamp(26px, 8vw, 32px); }
  .band-mother .tagline { margin-top: 14px; font-size: 17px; color: var(--text-dim); }

  .id-tag {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 36px;
    margin-top: 4px;
    border: 0;
  }
  .id-code { align-items: flex-start; }
  .id-code .barcode { width: 72px; margin-bottom: 0; }
  .id-warning {
    padding-left: 26px;
    border-left: 1px solid var(--line);
    font-size: 12px;
    line-height: 1.5;
    text-align: left;
  }
}

@media (max-width: 380px) {
  .brand-text { font-size: 10px; }
  .id-tag { gap: 20px; }
}