.mini-book-page { background: var(--paper); }
.mini-book-page main { min-width: 0; overflow: clip; }
.reading-progress { position: fixed; z-index: 1600; inset: 0 0 auto; height: 3px; pointer-events: none; }
.reading-progress span { display: block; width: 0; height: 100%; background: linear-gradient(90deg, var(--green), var(--purple)); }

.reader-bar { position: sticky; z-index: 1000; top: var(--header-height); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.95); box-shadow: 0 8px 25px rgba(20,39,31,.045); backdrop-filter: blur(16px) saturate(140%); }
.reader-bar-inner { min-height: 68px; display: grid; grid-template-columns: minmax(190px,.55fr) 42px minmax(300px,1fr) 42px auto; gap: 10px; align-items: center; }
.reader-identity { display: grid; gap: 1px; }
.reader-identity strong { font-family: var(--font-serif); font-size: 1rem; }
.reader-identity span { color: var(--ink-muted); font-size: .64rem; font-weight: 700; }
.reader-arrow { width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 13px; background: var(--paper-warm); cursor: pointer; font-size: 1.05rem; transition: transform 150ms ease, background 150ms ease; }
.reader-arrow:hover:not(:disabled) { transform: translateY(-1px); background: var(--green-pale); }
.reader-arrow:disabled { opacity: .35; cursor: default; }
.chapter-select-label { display: grid; grid-template-columns: auto minmax(0,1fr); gap: 10px; align-items: center; }
.chapter-select-label > span { color: var(--ink-muted); font-family: var(--font-display); font-size: .63rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.chapter-select-label select { width: 100%; min-height: 42px; padding: 0 42px 0 14px; border: 1px solid var(--line); border-radius: 13px; background: #fff; color: var(--ink); font-size: .77rem; font-weight: 700; }
.reader-meta { display: flex; align-items: center; justify-content: flex-end; gap: 14px; color: var(--ink-muted); font-size: .64rem; font-weight: 700; white-space: nowrap; }
.reader-meta a { display: inline-flex; min-height: 34px; align-items: center; padding: 6px 11px; border-radius: 999px; background: var(--purple-pale); color: var(--purple-dark); font-weight: 800; }
.reader-bar-track { height: 2px; background: rgba(20,39,31,.06); }
.reader-bar-track span { display: block; width: 0; height: 100%; background: var(--purple); }

.mini-hero { position: relative; overflow: hidden; padding: clamp(66px,7vw,108px) 0 clamp(74px,7.5vw,114px); background: radial-gradient(circle at 94% 10%, rgba(155,114,220,.16), transparent 28rem), radial-gradient(circle at 5% 88%, rgba(64,192,118,.16), transparent 26rem), linear-gradient(180deg, #faf7f4, var(--paper)); }
.mini-hero::before { content: ""; position: absolute; inset: 0; opacity: .2; background-image: linear-gradient(to right, rgba(20,39,31,.06) 1px, transparent 1px), linear-gradient(to bottom, rgba(20,39,31,.06) 1px, transparent 1px); background-size: 104px 104px; mask-image: linear-gradient(to bottom,#000,transparent 90%); }
.mini-hero-grid { position: relative; display: grid; grid-template-columns: minmax(0,.96fr) minmax(470px,1.04fr); gap: clamp(48px,7vw,94px); align-items: center; }
.mini-hero-copy h1 { max-width: 9ch; margin-bottom: 22px; font-family: var(--font-serif); font-size: clamp(4rem,6.3vw,6.7rem); font-weight: 750; letter-spacing: -.06em; }
.mini-hero-lede { max-width: 650px; margin-bottom: 28px; color: var(--ink); font-size: clamp(1.12rem,1.6vw,1.34rem); line-height: 1.65; }
.mini-route-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
.mini-route { display: grid; grid-template-columns: 42px minmax(0,1fr); gap: 14px; min-height: 196px; padding: 20px; border: 1px solid var(--line); border-radius: 22px; background: rgba(255,255,255,.9); box-shadow: var(--shadow-sm); transition: transform 170ms ease, box-shadow 170ms ease; }
.mini-route:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.mini-route > span { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 14px; font-family: var(--font-serif); font-size: 1.55rem; font-weight: 700; }
.story-route > span { background: var(--green-pale); color: var(--green-dark); }
.science-route > span { background: var(--purple-pale); color: var(--purple-dark); }
.mini-route strong { display: block; margin: 2px 0 7px; font-family: var(--font-display); font-size: .79rem; }
.mini-route p { margin-bottom: 16px; font-size: .8rem; line-height: 1.55; }
.mini-route b { display: block; margin-top: auto; color: var(--green-dark); font-family: var(--font-display); font-size: .7rem; }
.science-route b { color: var(--purple-dark); }
.mini-hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.abridged-line { max-width: 660px; margin: 20px 0 0; color: var(--ink-muted); font-size: .78rem; line-height: 1.55; }
.abridged-line strong { color: var(--purple-dark); }
.mini-hero-figure { overflow: hidden; padding: 9px; border: 1px solid var(--line); border-radius: 31px; background: #fff; box-shadow: var(--shadow-lg); }
.mini-hero-figure img { width: 100%; aspect-ratio: 1.32 / 1; border-radius: 22px; object-fit: cover; }
.mini-hero-figure figcaption { display: grid; grid-template-columns: auto 1fr; gap: 8px 20px; padding: 16px 11px 7px; }
.mini-hero-figure strong { color: var(--green-dark); font-family: var(--font-display); font-size: .68rem; }
.mini-hero-figure strong:nth-of-type(2) { color: var(--purple-dark); }
.mini-hero-figure span { justify-self: end; color: var(--ink-muted); font-size: .68rem; }
.mini-directory-wrap { position: relative; margin-top: 30px; }
.chapter-directory { max-width: 800px; }
.chapter-directory summary { display: inline-flex; align-items: center; gap: 8px; min-height: 42px; padding: 9px 15px; border: 1px solid var(--line); border-radius: 999px; background: rgba(255,255,255,.84); cursor: pointer; color: var(--ink); font-family: var(--font-display); font-size: .7rem; font-weight: 800; list-style: none; }
.chapter-directory summary::-webkit-details-marker { display: none; }
.chapter-directory nav { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px; margin-top: 12px; padding: 16px; border: 1px solid var(--line); border-radius: 22px; background: rgba(255,255,255,.96); box-shadow: var(--shadow-md); }
.chapter-directory a { display: grid; grid-template-columns: 32px minmax(0,1fr); gap: 0 9px; align-items: center; min-height: 58px; padding: 8px; border-radius: 14px; transition: background 150ms ease; }
.chapter-directory a:hover { background: var(--green-pale); }
.chapter-directory a > span { grid-row: 1 / span 2; display: grid; width: 32px; height: 32px; place-items: center; border-radius: 50%; background: var(--paper); color: var(--green-dark); font-family: var(--font-display); font-size: .62rem; font-weight: 800; }
.chapter-directory strong { font-family: var(--font-display); font-size: .68rem; line-height: 1.25; }
.chapter-directory small { color: var(--ink-muted); font-size: .6rem; text-transform: capitalize; }

.mini-reading-shell { padding: clamp(70px,7vw,104px) 0 clamp(90px,8vw,130px); background: var(--paper); }
.mini-reading-shell > .container { width: min(calc(100% - 32px), 1080px); }
.mini-document { overflow: hidden; border: 1px solid var(--line); border-radius: 34px; background: #fff; box-shadow: var(--shadow-md); }
.mini-chapter { position: relative; padding: clamp(76px,9vw,124px) clamp(48px,10vw,130px); scroll-margin-top: calc(var(--header-height) + 90px); }
.mini-chapter + .mini-chapter { border-top: 1px solid var(--line); }
.mini-chapter.story { background: linear-gradient(180deg, rgba(233,248,239,.44), rgba(255,255,255,0) 360px); }
.mini-chapter.science { background: linear-gradient(180deg, rgba(241,234,255,.48), rgba(255,255,255,0) 360px); }
.mini-chapter-header { max-width: 880px; display: grid; grid-template-columns: 68px minmax(0,1fr); gap: 22px; align-items: start; margin: 0 auto 42px; }
.chapter-number { display: grid; width: 64px; height: 64px; place-items: center; border-radius: 20px; background: var(--green-pale); color: var(--green-dark); font-family: var(--font-display); font-size: .8rem; font-weight: 800; }
.mini-chapter.science .chapter-number { background: var(--purple-pale); color: var(--purple-dark); }
.chapter-thread { margin-bottom: 9px; color: var(--green-dark); font-family: var(--font-display); font-size: .67rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.chapter-thread.science { color: var(--purple-dark); }
.mini-chapter-header h2 { max-width: 14ch; margin-bottom: 15px; font-family: var(--font-serif); font-size: clamp(3rem,5.8vw,5.2rem); font-weight: 750; letter-spacing: -.055em; }
.chapter-deck { max-width: 720px; margin-bottom: 0; font-size: 1.05rem; line-height: 1.65; }
.chapter-quote { max-width: 820px; margin: 0 auto 48px; padding: 25px 28px; border-left: 5px solid var(--green); border-radius: 0 22px 22px 0; background: var(--green-pale); }
.mini-chapter.science .chapter-quote { border-left-color: var(--purple); background: var(--purple-pale); }
.chapter-quote p { margin: 0; color: var(--ink); font-family: var(--font-serif); font-size: clamp(1.65rem,3vw,2.35rem); font-style: italic; line-height: 1.32; }
.chapter-prose { max-width: 760px; margin: 0 auto; color: var(--ink); font-family: var(--font-serif); font-size: 1.13rem; line-height: 1.84; }
.chapter-prose h3 { margin-bottom: 17px; font-family: var(--font-display); font-size: 1.28rem; letter-spacing: -.025em; }
.chapter-prose p { margin-bottom: 1.25em; color: #35483f; font: inherit; }
.chapter-prose p:last-child { margin-bottom: 0; }
.chapter-subsection + .chapter-subsection { margin-top: 52px; }
.chapter-footer { max-width: 820px; display: flex; flex-direction: column; gap: 17px; margin: 58px auto 0; padding-top: 24px; border-top: 1px solid var(--line); }
.chapter-footer > div { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.chapter-footer > div p { margin: 0; color: var(--ink-muted); font-size: .72rem; }
.chapter-footer > div > a { flex: 0 0 auto; color: var(--purple-dark); font-size: .72rem; font-weight: 800; }
.chapter-footer nav { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 10px; }
.chapter-neighbor { display: grid; gap: 3px; padding: 14px 16px; border: 1px solid var(--line); border-radius: 16px; background: var(--paper-warm); transition: background 150ms ease, transform 150ms ease; }
.chapter-neighbor:hover { transform: translateY(-2px); background: var(--green-pale); }
.chapter-neighbor.next { text-align: right; }
.chapter-neighbor span { color: var(--ink-muted); font-size: .61rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.chapter-neighbor strong { color: var(--ink); font-family: var(--font-display); font-size: .76rem; }
.chapter-footer nav .chapter-neighbor:only-child.next { grid-column: 2; }
.chapter-footer nav .chapter-neighbor:only-child.previous { grid-column: 1; }

.mini-finish { padding: clamp(72px,9vw,116px) clamp(34px,8vw,100px); background: radial-gradient(circle at 88% 10%, rgba(155,114,220,.42), transparent 22rem), var(--green-deep); text-align: center; scroll-margin-top: calc(var(--header-height) + 88px); }
.mini-finish h2 { max-width: 760px; margin: 0 auto 20px; color: #fff; font-family: var(--font-serif); }
.mini-finish > p:not(.eyebrow) { max-width: 680px; margin: 0 auto; color: rgba(255,255,255,.74); }
.mini-finish > div { display: flex; justify-content: center; flex-wrap: wrap; gap: 10px; margin-top: 28px; }

@media (max-width: 1080px) {
  .reader-bar-inner { grid-template-columns: 42px minmax(260px,1fr) 42px auto; }
  .reader-identity { display: none; }
  .mini-hero-grid { grid-template-columns: 1fr; }
  .mini-hero-copy { max-width: 850px; }
  .mini-hero-copy h1 { max-width: 10ch; }
  .mini-hero-figure { max-width: 900px; }
  .chapter-directory nav { grid-template-columns: repeat(2,minmax(0,1fr)); }
}

@media (max-width: 760px) {
  .reader-bar-inner { min-height: 68px; grid-template-columns: 38px minmax(0,1fr) 38px; gap: 8px; }
  .reader-meta { grid-column: 1 / 4; justify-content: space-between; padding-bottom: 8px; }
  .chapter-select-label > span { display: none; }
  .chapter-select-label { display: block; }
  .reader-arrow { width: 38px; height: 38px; }
  .mini-hero { padding: 50px 0 78px; }
  .mini-hero-grid { gap: 38px; }
  .mini-hero-copy h1 { font-size: clamp(3.7rem,16vw,5.4rem); }
  .mini-route-grid { grid-template-columns: 1fr; }
  .mini-route { min-height: 170px; }
  .mini-hero-actions { display: grid; }
  .mini-hero-actions .button { width: 100%; }
  .mini-hero-figure { padding: 7px; border-radius: 24px; }
  .mini-hero-figure img { border-radius: 18px; }
  .mini-hero-figure figcaption { grid-template-columns: 1fr; gap: 3px; padding: 13px 10px 7px; }
  .mini-hero-figure span { justify-self: start; }
  .chapter-directory { width: 100%; }
  .chapter-directory summary { width: 100%; justify-content: space-between; }
  .chapter-directory nav { grid-template-columns: 1fr; }
  .mini-reading-shell { padding: 48px 0 80px; }
  .mini-reading-shell > .container { width: min(calc(100% - 18px),1080px); }
  .mini-document { border-radius: 24px; }
  .mini-chapter { padding: 62px 23px; scroll-margin-top: 124px; }
  .mini-chapter-header { grid-template-columns: 50px minmax(0,1fr); gap: 15px; margin-bottom: 32px; }
  .chapter-number { width: 48px; height: 48px; border-radius: 15px; }
  .mini-chapter-header h2 { font-size: clamp(2.7rem,12vw,4rem); }
  .chapter-quote { margin-bottom: 38px; padding: 21px; }
  .chapter-prose { font-size: 1.05rem; line-height: 1.78; }
  .chapter-subsection + .chapter-subsection { margin-top: 39px; }
  .chapter-footer > div { align-items: flex-start; flex-direction: column; }
  .chapter-footer nav { grid-template-columns: 1fr; }
  .chapter-footer nav .chapter-neighbor:only-child { grid-column: auto; }
  .chapter-neighbor.next { text-align: left; }
  .mini-finish { padding: 68px 23px; }
  .mini-finish > div { display: grid; }
}

@media (max-width: 420px) {
  .reader-meta span { font-size: .58rem; }
  .reader-meta a { min-height: 31px; padding: 5px 9px; }
  .mini-chapter-header { grid-template-columns: 1fr; }
  .chapter-number { margin-bottom: 2px; }
}