:root {
  --bg: #05070d;
  --panel: rgba(9, 13, 21, .82);
  --line: rgba(255,255,255,0.11);
  --line-strong: rgba(255,255,255,0.16);
  --text: #f6f7fb;
  --muted: #b7c0d1;
  --accent: #e4d1a2;
  --shadow: 0 24px 64px rgba(0,0,0,.34);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --book-width: 420px;
  --book-height: 746px;
  --page-radius: 28px;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
html { background: #04060b; }
html { scroll-behavior: smooth; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top, rgba(62, 86, 132, 0.26), transparent 34%),
    radial-gradient(circle at bottom, rgba(187, 146, 71, 0.10), transparent 28%),
    linear-gradient(180deg, #0b1220, #05070d 72%);
  color: var(--text);
}
body.is-immersive-open {
  overflow: hidden;
}
button, input { font: inherit; }
button { cursor: pointer; }
a { color: inherit; text-decoration: none; }
.hidden { display: none !important; }
.eyebrow {
  margin: 0 0 .35rem;
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .72rem;
  color: var(--muted);
}
.progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 120;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, rgba(228, 209, 162, 1), rgba(255,255,255,.95));
  box-shadow: 0 0 16px rgba(228, 209, 162, .35);
}
.icon-btn,
.primary-btn,
.ghost-btn,
.thumb-card,
.section-jump {
  border: 1px solid rgba(255,255,255,.12);
  transition: transform .22s ease, background .22s ease, border-color .22s ease, opacity .22s ease;
}
.icon-btn,
.nav-btn {
  width: 48px;
  height: 48px;
  border-radius: 999px;
  background: rgba(9, 13, 21, .7);
  color: white;
  backdrop-filter: blur(12px);
}
.icon-btn--light,
.nav-btn {
  background: rgba(7, 10, 17, .46);
  border-color: rgba(255,255,255,.16);
}
.primary-btn,
.ghost-btn,
.section-jump {
  min-height: 44px;
  border-radius: 999px;
  padding: .72rem 1rem;
  color: var(--text);
  background: rgba(255,255,255,.06);
}
.primary-btn {
  background: linear-gradient(180deg, rgba(222,203,158,.28), rgba(222,203,158,.14));
  border-color: rgba(222,203,158,.35);
}
.ghost-btn--light {
  background: rgba(255,255,255,.08);
}
.icon-btn:hover,
.nav-btn:hover,
.primary-btn:hover,
.ghost-btn:hover,
.thumb-card:hover,
.section-jump:hover {
  background: rgba(255,255,255,.11);
  transform: translateY(-1px);
}
.ghost-btn.is-active {
  background: linear-gradient(180deg, rgba(138, 201, 255, .18), rgba(138, 201, 255, .10));
  border-color: rgba(138, 201, 255, .34);
}
.ghost-btn.is-pending { border-style: dashed; }

/* Overview / parallax */
.overview-screen {
  position: relative;
  isolation: isolate;
  font-family: Georgia, "Times New Roman", serif;
  color: #f3efe7;
  background:
    radial-gradient(circle at top, rgba(71, 53, 29, 0.34), transparent 28%),
    linear-gradient(180deg, #120f0c, #070707 62%);
}
.overview-screen .eyebrow {
  color: #e2ceb0;
  letter-spacing: .2em;
}
.overview-topbar {
  position: fixed;
  inset: calc(var(--safe-top) + 10px) 14px auto;
  z-index: 110;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255,255,255,.08);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(7,7,7,.84), rgba(7,7,7,.34));
  backdrop-filter: blur(10px);
  box-shadow: 0 16px 48px rgba(0,0,0,.28);
}
.overview-brand h1 {
  margin: 0;
  font-size: clamp(1.15rem, 2.2vw, 1.6rem);
  font-weight: 600;
  letter-spacing: .01em;
}
.overview-topbar__actions {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-wrap: wrap;
}
.parallax-block {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: clip;
  isolation: isolate;
}
.parallax-block--section {
  min-height: 88svh;
}
.parallax-block__media,
.parallax-block__shade {
  position: absolute;
  inset: -6%;
}
.parallax-block__media {
  background-size: cover;
  background-position: center center;
  transform: translate3d(0, var(--parallax-shift, 0px), 0) scale(1.08);
  will-change: transform;
}
.parallax-block__shade {
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0,0,0,.70), rgba(0,0,0,.42) 34%, rgba(0,0,0,.82)),
    radial-gradient(circle at center, rgba(255,255,255,.05), transparent 34%, rgba(0,0,0,.34) 78%);
}
.parallax-block__inner {
  position: relative;
  z-index: 1;
  width: min(920px, calc(100% - 32px));
  padding: 132px 24px 84px;
  text-align: center;
}
.hero-eyebrow {
  color: #f4ddb0;
}
.parallax-block__inner h2 {
  margin: 0 0 16px;
  font-size: clamp(2.8rem, 7vw, 5.8rem);
  line-height: .95;
  font-weight: 600;
}
.hero-lead,
.band-lead {
  max-width: 760px;
  margin: 0 auto;
  color: #e4dacb;
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.62;
}
.hero-actions,
.band-actions {
  display: flex;
  justify-content: center;
  gap: .85rem;
  flex-wrap: wrap;
  margin-top: 26px;
}
.hero-quote {
  max-width: 760px;
  margin: 26px auto 0;
  padding: 20px 22px;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 18px;
  background: rgba(8,8,8,.36);
  backdrop-filter: blur(4px);
  color: #f0e6d5;
  box-shadow: var(--shadow);
  line-height: 1.6;
}
.overview-intro-wrap,
.section-band__content {
  width: min(1240px, calc(100% - 28px));
  margin: 0 auto;
}
.overview-intro-wrap {
  position: relative;
  margin-top: -78px;
  z-index: 2;
}
.section-panel {
  border: 1px solid rgba(255,255,255,.10);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(20,17,13,.92), rgba(8,8,8,.96));
  box-shadow: var(--shadow);
}
.overview-intro {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 28px;
  padding: 30px;
}
.overview-intro__copy h3,
.section-copy h3 {
  margin: 0 0 12px;
  font-size: clamp(1.45rem, 2.6vw, 2.15rem);
  font-weight: 600;
}
.overview-intro__copy p,
.section-copy p,
.band-meta {
  margin: 0;
  color: #cfc4b4;
  line-height: 1.7;
}
.overview-intro__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}
.overview-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.overview-chip,
.section-anchor {
  padding: 9px 12px;
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 999px;
  background: rgba(255,255,255,.04);
  color: #ecd8aa;
  font-size: .92rem;
}
.overview-section-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.section-anchor {
  text-decoration: none;
  color: #efe3c6;
  transition: transform .22s ease, background .22s ease, border-color .22s ease;
}
.section-anchor:hover {
  transform: translateY(-1px);
  background: rgba(255,255,255,.08);
  border-color: rgba(230, 200, 135, .38);
}
.overview-sections {
  padding: 40px 0 88px;
}
.section-band {
  margin-top: 34px;
}
.section-band__content {
  margin-top: -72px;
  position: relative;
  z-index: 2;
}
.section-layout {
  display: grid;
  gap: 24px;
  padding: 24px;
}
.section-copy {
  display: grid;
  gap: 16px;
}
.band-heading {
  display: grid;
  gap: 12px;
  justify-items: center;
  text-align: center;
}
.band-heading h2 {
  font-size: clamp(2.1rem, 5vw, 3.8rem);
  font-weight: 600;
}
.band-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 18px;
}
.band-quote {
  max-width: 720px;
  margin: 12px auto 0;
  padding: 18px 20px;
  border: 1px solid rgba(255,255,255,.11);
  border-radius: 18px;
  background: rgba(8,8,8,.28);
  color: #f0e8da;
  line-height: 1.6;
}
.thumb-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}
.thumb-card {
  display: block;
  padding: 10px;
  border-radius: 22px;
  background: rgba(255,255,255,.045);
  text-align: left;
  color: var(--text);
  box-shadow: 0 16px 40px rgba(0,0,0,.22);
}
.thumb-card__media {
  position: relative;
  aspect-ratio: 9 / 16;
  border-radius: 16px;
  overflow: hidden;
  background: rgba(255,255,255,.04);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.06);
}
.thumb-card__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 45%, rgba(0,0,0,.18));
  pointer-events: none;
}
.thumb-card__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.thumb-card__meta {
  padding: 11px 4px 2px;
  display: grid;
  gap: 5px;
}
.thumb-card__meta strong {
  font-size: .98rem;
  font-weight: 600;
}
.thumb-card__meta span {
  color: #c2b7a7;
  font-size: .85rem;
}
.section-jump {
  border-color: rgba(236, 216, 170, .36);
  background: rgba(236, 216, 170, .10);
}
.overview-screen .primary-btn,
.overview-screen .ghost-btn,
.overview-screen .section-jump {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
.overview-screen .primary-btn {
  color: #f7f1e6;
}
.overview-screen .ghost-btn {
  color: #f0e8da;
  background: rgba(255,255,255,.05);
}


/* Immersive overlay */
.immersive-app {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
}
body.is-immersive-open .immersive-app {
  opacity: 1;
  pointer-events: auto;
}
.immersive-app__backdrop,
.stage-bg,
.stage-vignette {
  position: absolute;
  inset: 0;
}
.immersive-app__backdrop {
  z-index: 0;
  overflow: hidden;
}
.stage-bg {
  background-size: cover;
  background-position: center center;
  filter: saturate(1.03) blur(18px);
  transform: translate3d(0, 0, 0) scale(1.08);
  transition: opacity .72s cubic-bezier(.22, 1, .36, 1), transform .72s cubic-bezier(.22, 1, .36, 1);
}
.stage-bg--next {
  opacity: 0;
}
.stage-vignette {
  background:
    radial-gradient(circle at center, rgba(255,255,255,.05), transparent 28%, rgba(0,0,0,.42) 82%),
    linear-gradient(180deg, rgba(5,7,12,.32), rgba(5,7,12,.58)),
    linear-gradient(180deg, rgba(5,7,12,.72), transparent 18%, transparent 72%, rgba(5,7,12,.78));
}
.immersive-topbar,
.immersive-bottom,
.viewer-wrap {
  position: relative;
  z-index: 1;
}
.immersive-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: calc(var(--safe-top) + 12px) 18px 8px;
}
.immersive-topbar__left,
.immersive-topbar__actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.immersive-topbar h2 {
  margin: 0;
  font-size: clamp(1rem, 2.1vw, 1.35rem);
}
.viewer-wrap {
  min-height: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 0 14px;
}
.viewer-stage {
  min-height: 0;
  height: 100%;
  display: grid;
  place-items: center;
  padding: 4px 8px;
}
.book-shell {
  position: relative;
  width: var(--book-width);
  height: var(--book-height);
}
.page-layer {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
}
.page-card {
  width: 100%;
  height: 100%;
  border-radius: var(--page-radius);
  overflow: hidden;
  background: rgba(0,0,0,.22);
  border: 1px solid rgba(255,255,255,.12);
  box-shadow: 0 30px 80px rgba(0,0,0,.48);
  backdrop-filter: blur(1px);
}
.page-card--incoming {
  transform: translate3d(0, var(--page-enter, 8%), 0) scale(.985);
  opacity: .001;
}
.book-shell.is-transitioning .page-card--current {
  transform: translate3d(0, var(--page-exit, -5%), 0) scale(.985);
  opacity: 0;
  transition: transform .72s cubic-bezier(.22, 1, .36, 1), opacity .72s cubic-bezier(.22, 1, .36, 1);
}
.book-shell.is-transitioning .page-card--incoming {
  transform: translate3d(0, 0, 0) scale(1);
  opacity: 1;
  transition: transform .72s cubic-bezier(.22, 1, .36, 1), opacity .72s cubic-bezier(.22, 1, .36, 1);
}
.viewer-stage.is-transitioning .stage-bg--current {
  opacity: 0;
  transform: translate3d(0, var(--bg-exit, -3%), 0) scale(1.1);
}
.viewer-stage.is-transitioning .stage-bg--next {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1.08);
}
.page-surface,
.page-media {
  width: 100%;
  height: 100%;
}
.page-surface {
  display: flex;
  align-items: stretch;
  justify-content: center;
  background: rgba(255,255,255,.02);
}
.page-media {
  display: block;
  object-fit: contain;
  background: transparent;
}
.page-surface--video {
  background: transparent;
}
.page-surface--video video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: transparent;
}
.nav-btn {
  border: 1px solid rgba(255,255,255,.16);
}
.immersive-bottom {
  display: grid;
  gap: 10px;
  padding: 8px 18px calc(var(--safe-bottom) + 12px);
}
.page-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  color: #eef1f7;
}
.page-meta span { color: var(--muted); }
#pageRange {
  width: 100%;
}

@media (max-width: 1160px) {
  .thumb-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 920px) {
  .overview-topbar {
    inset-inline: 12px;
    padding: 12px 14px;
  }
  .overview-topbar__actions { gap: .5rem; }
  .overview-intro {
    grid-template-columns: 1fr;
    padding: 24px;
  }
  .thumb-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .viewer-wrap {
    grid-template-columns: minmax(0, 1fr);
    justify-items: center;
  }
  .nav-btn {
    position: fixed;
    bottom: calc(var(--safe-bottom) + 22px);
    z-index: 3;
  }
  .nav-btn--prev { left: 14px; }
  .nav-btn--next { right: 14px; }
}
@media (max-width: 640px) {
  .overview-topbar {
    align-items: start;
    flex-direction: column;
  }
  .parallax-block__inner {
    width: min(100%, calc(100% - 24px));
    padding: 138px 8px 84px;
  }
  .parallax-block__inner h2 {
    font-size: clamp(2.2rem, 12vw, 4rem);
  }
  .overview-intro-wrap,
  .section-band__content {
    width: min(100%, calc(100% - 18px));
  }
  .overview-intro-wrap { margin-top: -72px; }
  .section-band__content { margin-top: -62px; }
  .section-layout,
  .overview-intro { padding: 20px; }
  .thumb-grid { grid-template-columns: 1fr; gap: 12px; }
  .immersive-topbar {
    align-items: start;
    gap: .75rem;
    padding-inline: 12px;
  }
  .immersive-topbar__left {
    min-width: 0;
  }
  .immersive-topbar h2 {
    max-width: min(68vw, 320px);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .immersive-topbar__actions {
    margin-left: auto;
  }
  .viewer-wrap { padding-inline: 8px; }
  .book-shell {
    max-width: calc(100vw - 16px);
  }
}