* {
  box-sizing: border-box;
}

:root {
  --rail-width: 56px;
}

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
}

html {
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
}

body {
  overflow-y: auto;
  overscroll-behavior-y: contain;
  color: var(--c-ink);
  background: var(--c-bg);
  font-family: var(--font-reading);
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.07;
  z-index: 1;
  background-image: radial-gradient(circle at 1px 1px, rgba(0, 0, 0, 0.2) 1px, transparent 0);
  background-size: 4px 4px;
}

/* ── Rail ── */

.rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-width);
  z-index: 24;
  border-right: 1px solid rgba(35, 30, 24, 0.1);
  background: rgba(245, 240, 228, 0.88);
  backdrop-filter: blur(2px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
}

.rail-mark {
  margin-top: 2px;
  font: 600 0.68rem/1 var(--font-numeral);
  letter-spacing: 0.14em;
  color: var(--c-ink-muted);
}

.rail-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 100%;
  align-items: center;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  flex: 1;
  min-height: 0;
  padding: 4px 0;
}

.rail-nav::-webkit-scrollbar {
  display: none;
}

.rail-link {
  width: 100%;
  text-align: center;
  text-decoration: none;
  font: 600 0.58rem/1 var(--font-ui);
  letter-spacing: 0.04em;
  color: rgba(32, 30, 27, 0.26);
  padding: 2px 0;
  flex-shrink: 0;
  transition: color 160ms ease;
}

.rail-link.active {
  color: rgba(24, 22, 20, 0.92);
  font-weight: 700;
}

.rail-link--section {
  margin-top: 4px;
  padding-top: 6px;
  border-top: 1px solid var(--c-line);
  font-family: var(--font-numeral);
  font-weight: 600;
  letter-spacing: 0.12em;
  color: rgba(32, 30, 27, 0.45);
}

.rail-link--section.active {
  color: var(--c-accent-gold);
}


/* ── Meta / page counter ── */

.meta {
  position: fixed;
  top: 18px;
  right: 22px;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 14px;
}

.meta__random {
  all: unset;
  cursor: pointer;
  font: 600 0.68rem/1 var(--font-ui);
  letter-spacing: 0.06em;
  color: var(--c-ink-muted);
  border: 1px solid rgba(35, 30, 24, 0.15);
  border-radius: 14px;
  padding: 5px 12px;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.meta__random:hover {
  color: var(--c-accent-gold);
  border-color: var(--c-accent-gold);
  background: rgba(184, 146, 58, 0.08);
}

.meta__btn {
  all: unset;
  cursor: pointer;
  font: 600 0.86rem/1 var(--font-numeral);
  letter-spacing: 0.05em;
  color: var(--c-ink-muted);
  transition: color 160ms ease;
  font-variant-numeric: tabular-nums;
  min-width: 7.5ch;
  text-align: right;
}

.meta__btn:hover {
  color: var(--c-accent-gold);
}

/* ── Page Picker Overlay ── */

.page-picker {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(245, 240, 228, 0.96);
  backdrop-filter: blur(8px);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
  overflow-y: auto;
}

.page-picker.open {
  opacity: 1;
  pointer-events: auto;
}

.page-picker__header {
  width: 100%;
  max-width: 480px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.page-picker__title {
  font: 600 0.72rem/1 var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-ink-muted);
}

.page-picker__close {
  all: unset;
  cursor: pointer;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--c-ink-muted);
  padding: 4px 8px;
  transition: color 160ms ease;
}

.page-picker__close:hover {
  color: var(--c-ink);
}

.page-picker__grid {
  width: 100%;
  max-width: 480px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(44px, 1fr));
  gap: 6px;
  margin-bottom: 24px;
}

.page-picker__cell {
  all: unset;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 1;
  border-radius: 6px;
  font: 600 0.68rem/1 var(--font-ui);
  letter-spacing: 0.04em;
  color: var(--c-ink-muted);
  background: rgba(35, 30, 24, 0.04);
  transition: background 160ms ease, color 160ms ease;
}

.page-picker__cell:hover {
  background: rgba(184, 146, 58, 0.15);
  color: var(--c-ink);
}

.page-picker__cell.active {
  background: var(--c-accent-gold);
  color: #fff;
}

.page-picker__cell--label {
  aspect-ratio: auto;
  padding: 8px 6px;
  font-size: 0.6rem;
  letter-spacing: 0.06em;
  grid-column: span 2;
}

.page-picker__cell--section {
  background: transparent;
  font-family: var(--font-numeral);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--c-ink-soft);
  grid-column: 1 / -1;
  aspect-ratio: auto;
  padding: 12px 0 4px;
  justify-content: flex-start;
  cursor: default;
}

.page-picker__cell--section:hover {
  background: transparent;
  color: var(--c-ink-soft);
}

.page-picker__random {
  all: unset;
  cursor: pointer;
  font: 600 0.72rem/1 var(--font-ui);
  letter-spacing: 0.08em;
  color: var(--c-ink-muted);
  border: 1px solid rgba(35, 30, 24, 0.15);
  border-radius: 20px;
  padding: 10px 20px;
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.page-picker__random:hover {
  color: var(--c-accent-gold);
  border-color: var(--c-accent-gold);
  background: rgba(184, 146, 58, 0.08);
}

/* ── Reader ── */

.reader {
  margin-left: var(--rail-width);
  position: relative;
  z-index: 2;
}

.page {
  min-height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  align-items: center;
  padding: 64px 28px 54px;
}

.page-grid {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 440px) minmax(340px, 1fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
}

.page-grid--centered {
  grid-template-columns: 1fr;
  justify-items: center;
}

/* ── Art column ── */

.art-col {
  margin: 0;
  width: min(480px, 100%);
  aspect-ratio: 1 / 1;
  background: var(--c-bg-elev);
  box-shadow: 0 10px 24px rgba(22, 18, 14, 0.06);
  overflow: hidden;
}

.art-col canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.art-col--illustration {
  background: transparent;
  box-shadow: none;
}

.illustration-placeholder {
  width: 100%;
  height: 100%;
}

.illustration-placeholder svg {
  width: 100%;
  height: 100%;
}

/* ── Text column ── */

.text-col {
  font-size: var(--fs-reading);
  line-height: var(--lh-reading);
  color: rgba(26, 23, 20, 0.91);
}

.text-col--wide {
  max-width: 56ch;
}

.text-wrap {
  display: grid;
  grid-template-columns: 28px minmax(280px, var(--max-reading-width));
  gap: 18px;
  align-items: start;
}

.text-wrap--centered {
  grid-template-columns: 28px minmax(260px, 52ch);
}

.inline-num {
  margin-top: 0;
  padding-top: 1px;
  font-family: var(--font-ui);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--c-ink-muted);
}

.inline-num--large {
  font-size: 1.6rem;
  color: var(--c-accent-gold);
  margin-top: 0;
}

.text-body p {
  margin: 0 0 18px;
  text-wrap: pretty;
}

.text-body p:last-child {
  margin-bottom: 0;
}

.quote-topic {
  font: 600 0.68rem/1 var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--c-ink-muted);
  margin-bottom: 1rem !important;
}

.text-body .lead {
  font: italic 400 clamp(1.3rem, 2vw, 2rem) / 1.2 var(--font-reading);
  color: var(--c-ink-soft);
  margin-bottom: 1.2rem;
}

.option-label {
  font: 600 0.72rem/1 var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-accent-gold);
  margin-bottom: 1.2rem !important;
}

/* ── Typography-only page ── */

.page--typo-only {
  background: linear-gradient(
    180deg,
    var(--c-bg) 0%,
    #f0e8d4 50%,
    var(--c-bg) 100%
  );
}

.text-body--hero {
  font-size: clamp(1.08rem, 1.7vw, 1.38rem);
  line-height: 1.62;
}

/* ── Cover ── */

.page--title .page-grid {
  grid-template-columns: 1fr;
  justify-items: stretch;
  gap: 0;
}

.page--title .text-col {
  max-width: 100%;
  font-family: var(--font-ui);
  text-align: center;
  transform: translateX(calc(var(--rail-width) * -0.5));
}

.page--title .text-wrap {
  display: block;
}

.page--title .cover-body {
  display: grid;
  justify-items: center;
  gap: 0;
}

.page--title .text-body .kicker {
  margin-bottom: 1.4rem;
  font: 600 0.65rem/1.4 var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--c-ink-muted);
  max-width: 36ch;
}

.page--title .text-body .title-stack {
  margin: 0 0 0.8rem;
  font-family: var(--font-numeral);
  font-weight: 400;
  font-size: clamp(2.6rem, 8vw, 6.2rem);
  line-height: 1.06;
  letter-spacing: 0.16em;
  color: rgba(20, 20, 20, 0.95);
}

.page--title .text-body .subtitle {
  margin: 0.2rem 0 1.6rem;
  font: italic 400 clamp(1.2rem, 2vw, 2.2rem) / 1.2 var(--font-reading);
  color: var(--c-ink-soft);
}

.cover-mark {
  position: relative;
  width: clamp(120px, 14vw, 180px);
  aspect-ratio: 3 / 2;
  margin: 0.6rem 0 1.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.medici-balls {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  width: 80%;
}

.medici-balls .ball {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--c-accent-gold);
  opacity: 0.55;
}

.page--title .cover-credit {
  margin-top: 0.2rem;
  font: 500 clamp(0.9rem, 1.2vw, 1.25rem) / 1.4 var(--font-reading);
  color: var(--c-ink-muted);
}

.page--text-only .page-grid {
  grid-template-columns: 1fr;
  justify-items: stretch;
  gap: 0;
}

.page--text-only .text-col {
  width: min(100%, 760px);
  max-width: none;
  margin: 0 auto;
  font-size: clamp(1.1rem, 1.6vw, 1.5rem);
  line-height: 1.48;
  text-align: left;
}

.page--text-only .text-wrap {
  display: block;
  width: min(100%, 44ch);
  margin: 0 auto;
  gap: 0;
}

.page--text-only .inline-num {
  display: none;
}

/* ── Footer watermark ── */

.book-mark {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 10;
  font: 500 0.74rem/1 var(--font-ui);
  letter-spacing: 0.11em;
  color: rgba(44, 39, 35, 0.28);
  pointer-events: none;
}

/* ── Responsive ── */

@media (max-width: 980px) {
  .page {
    padding: 74px 18px 66px;
  }

  .page-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    justify-items: center;
  }

  .text-wrap {
    grid-template-columns: 20px minmax(230px, var(--max-reading-width));
    gap: 12px;
  }

  .text-col {
    font-size: clamp(0.95rem, 2.6vw, 1.18rem);
  }

  .page--title .text-body .title-stack {
    font-size: clamp(2rem, 10vw, 4.2rem);
    letter-spacing: 0.14em;
  }

  .page--title .text-body .subtitle {
    font-size: clamp(1rem, 5vw, 1.6rem);
  }

  .cover-mark {
    width: clamp(100px, 30vw, 160px);
  }
}

@media (max-width: 680px) {
  :root {
    --rail-width: 0px;
  }

  .rail {
    display: none;
  }

  .reader {
    margin-left: 0;
  }

  .page--title .text-col {
    transform: none;
  }

  .meta {
    right: 10px;
    top: 12px;
  }

  .meta__random {
    font-size: 0.62rem;
    padding: 4px 10px;
  }

  .meta__btn {
    font-size: 0.74rem;
  }

  .page {
    padding: 48px 16px 60px;
  }

  .book-mark {
    font-size: 0.6rem;
    bottom: 10px;
  }

  .art-col {
    width: min(200px, 50vw);
  }

  .text-col {
    font-size: clamp(1.08rem, 4.2vw, 1.28rem);
  }

  .text-wrap {
    grid-template-columns: 16px minmax(160px, 38ch);
    gap: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    animation: none !important;
    transition-duration: 1ms !important;
  }
}