/* ============================================================
   《打造 AI 時代的一人公司》出版提案
   Literary-editorial theme — warm paper, serif display, ample whitespace
   ============================================================ */

:root {
  --paper:      #faf7f0;
  --paper-2:    #f4eee2;
  --paper-3:    #efe7d7;
  --ink:        #211e18;
  --ink-soft:   #4b443a;
  --ink-faint:  #897f6e;
  --rule:       #ddd3c0;
  --rule-soft:  #e8e0d0;
  --accent:     #9c3b2c;   /* terracotta / book-spine red */
  --accent-dk:  #7e2f22;
  --gold:       #a8854f;   /* antique gold */
  --dark:       #211e18;
  --dark-2:     #2c2820;

  --serif: "Noto Serif TC", "Newsreader", "Songti TC", serif;
  --latin-serif: "Newsreader", "Noto Serif TC", serif;
  --sans:  "Noto Sans TC", -apple-system, "PingFang TC", "Microsoft JhengHei", sans-serif;

  --maxw: 1120px;
  --narrow: 760px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.85;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

::selection { background: var(--accent); color: #fff; }

/* ---------- layout helpers ---------- */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }
.container.narrow { max-width: var(--narrow); }

.band { padding: 96px 0; position: relative; }
.band-tint { background: var(--paper-2); }
.band-dark { background: var(--dark); color: var(--paper); }

/* ---------- header / nav ---------- */
#site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250, 247, 240, 0.82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .4s var(--ease), background .4s var(--ease);
}
#site-header.scrolled { border-bottom-color: var(--rule); background: rgba(250, 247, 240, 0.94); }
.header-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 28px;
  height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); min-width: 0; }
.brand-mark {
  font-family: var(--serif); font-weight: 700; font-size: .82rem; letter-spacing: .14em;
  color: #fff; background: var(--accent); padding: 4px 9px; border-radius: 3px; flex: none;
}
.brand-title { font-family: var(--serif); font-weight: 600; font-size: 1.02rem; letter-spacing: .02em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

#navbar ul { list-style: none; display: flex; align-items: center; gap: 4px; }
#navbar a {
  text-decoration: none; color: var(--ink-soft); font-size: .92rem; font-weight: 500;
  padding: 8px 12px; border-radius: 4px; transition: color .25s, background .25s; white-space: nowrap;
}
#navbar a:hover { color: var(--accent); }
#navbar a.active { color: var(--accent); }
#navbar a.nav-cta {
  color: #fff; background: var(--accent); margin-left: 8px;
}
#navbar a.nav-cta:hover { background: var(--accent-dk); color: #fff; }

#menu-toggle {
  display: none; background: none; border: none; font-size: 1.5rem; color: var(--ink);
  cursor: pointer; line-height: 1; padding: 6px;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--sans); font-weight: 500; font-size: 1rem; letter-spacing: .02em;
  padding: 14px 28px; border-radius: 4px; text-decoration: none; cursor: pointer;
  border: 1px solid transparent; transition: all .28s var(--ease);
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 22px -12px rgba(156, 59, 44, .7); }
.btn-primary:hover { background: var(--accent-dk); transform: translateY(-2px); box-shadow: 0 14px 30px -12px rgba(156, 59, 44, .75); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--rule); }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn-block { width: 100%; }

/* ---------- hero ---------- */
.hero { padding: 72px 0 80px; max-width: var(--maxw); margin: 0 auto; padding-left: 28px; padding-right: 28px; }
.hero-grid {
  display: grid; grid-template-columns: 1.25fr 0.85fr; gap: 64px; align-items: center;
}
.eyebrow {
  font-family: var(--latin-serif); font-style: italic; color: var(--accent);
  letter-spacing: .12em; font-size: .95rem; margin-bottom: 18px;
}
.hero-title {
  font-family: var(--serif); font-weight: 900; font-size: clamp(3rem, 6.4vw, 5.2rem);
  line-height: 1.04; letter-spacing: .01em; margin-bottom: 22px;
}
.hero-title .accent { color: var(--accent); }
.hero-sub {
  font-family: var(--serif); font-weight: 500; font-size: clamp(1.15rem, 2.1vw, 1.45rem);
  color: var(--ink-soft); margin-bottom: 26px; padding-left: 18px; border-left: 3px solid var(--gold);
}
.hero-lede { font-size: 1.06rem; color: var(--ink-soft); line-height: 2; margin-bottom: 30px; }
.hero-byline { margin-bottom: 34px; display: flex; flex-direction: column; gap: 3px; }
.byline-by { font-size: .78rem; letter-spacing: .2em; color: var(--ink-faint); }
.byline-name { font-family: var(--serif); font-weight: 700; font-size: 1.3rem; }
.byline-meta { font-size: .9rem; color: var(--ink-faint); }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

.hero-cover { display: flex; flex-direction: column; align-items: center; }
.cover-frame {
  position: relative; border-radius: 6px; overflow: hidden;
  box-shadow: 0 40px 80px -30px rgba(33, 30, 24, .55), 0 8px 18px -8px rgba(33, 30, 24, .3);
  transform: rotate(1.4deg); transition: transform .6s var(--ease);
}
.cover-frame::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(255,255,255,.28), rgba(255,255,255,0) 38%);
  pointer-events: none;
}
.hero-cover:hover .cover-frame { transform: rotate(0deg) translateY(-4px); }
.cover-caption { margin-top: 18px; font-size: .82rem; color: var(--ink-faint); font-style: italic; }

/* hero stats */
.hero-stats {
  margin-top: 64px; display: grid; grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
}
.hstat {
  padding: 28px 20px; text-align: center;
  border-left: 1px solid var(--rule-soft);
}
.hstat:first-child { border-left: none; }
.hstat-num {
  display: block; font-family: var(--serif); font-weight: 700; font-size: 2rem;
  color: var(--accent); line-height: 1.1; letter-spacing: .01em;
}
.hstat-num .plus { color: var(--gold); }
.hstat-label { display: block; font-weight: 500; font-size: .98rem; margin-top: 8px; }
.hstat-sub { display: block; font-size: .78rem; color: var(--ink-faint); margin-top: 3px; }

/* ---------- section headings ---------- */
.section-kicker {
  font-family: var(--latin-serif); font-style: italic; color: var(--accent);
  letter-spacing: .08em; font-size: 1.02rem; margin-bottom: 14px;
}
.section-kicker.light { color: var(--gold); }
.section-title {
  font-family: var(--serif); font-weight: 700; font-size: clamp(1.9rem, 3.6vw, 2.8rem);
  line-height: 1.25; letter-spacing: .01em; margin-bottom: 18px; max-width: 22ch;
}
.section-title.light { color: var(--paper); }
.section-desc { font-size: 1.08rem; color: var(--ink-soft); max-width: 60ch; margin-bottom: 44px; }
.section-desc.light { color: rgba(250,247,240,.78); }

/* ---------- background narrative ---------- */
.narrow .lead, .band .lead {
  font-family: var(--serif); font-size: 1.4rem; line-height: 1.7; color: var(--ink); margin-bottom: 28px;
}
#background p { font-size: 1.12rem; color: var(--ink-soft); margin-bottom: 24px; }
#background p strong, .band p strong { color: var(--ink); font-weight: 700; }
.pull {
  font-family: var(--serif); font-weight: 600; font-size: clamp(1.4rem, 2.6vw, 1.95rem);
  line-height: 1.55; color: var(--accent); margin: 44px 0; padding: 8px 0 8px 28px;
  border-left: 4px solid var(--gold);
}
.meta-card {
  margin-top: 48px; background: var(--paper); border: 1px solid var(--rule);
  border-radius: 8px; padding: 10px 28px;
}
.band-tint .meta-card { background: var(--paper); }
.meta-row {
  display: flex; justify-content: space-between; gap: 20px; padding: 16px 0;
  border-bottom: 1px solid var(--rule-soft); font-size: 1rem;
}
.meta-row:last-child { border-bottom: none; }
.meta-row span:first-child { color: var(--ink-faint); letter-spacing: .05em; flex: none; }
.meta-row span:last-child { font-weight: 500; text-align: right; }

/* ---------- selling cards ---------- */
.sell-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.sell-card {
  background: var(--paper); border: 1px solid var(--rule); border-radius: 10px;
  padding: 38px 34px; position: relative; transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}
.sell-card:hover { transform: translateY(-4px); box-shadow: 0 26px 50px -28px rgba(33,30,24,.4); }
.sell-no {
  font-family: var(--latin-serif); font-size: 2.4rem; font-weight: 500; color: var(--rule);
  display: block; line-height: 1; margin-bottom: 14px;
}
.sell-card h3 { font-family: var(--serif); font-weight: 700; font-size: 1.4rem; margin-bottom: 14px; line-height: 1.4; }
.sell-card p { font-size: 1.02rem; color: var(--ink-soft); }
.sell-card-hl { background: var(--dark); border-color: var(--dark); color: var(--paper); }
.sell-card-hl .sell-no { color: rgba(168,133,79,.6); }
.sell-card-hl h3 { color: #fff; }
.sell-card-hl p { color: rgba(250,247,240,.82); }
.sell-card-hl p strong { color: var(--gold); }

/* ---------- market ---------- */
.reader-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-bottom: 44px; }
.reader-block {
  background: var(--paper-2); border-radius: 10px; padding: 32px 30px; border: 1px solid var(--rule-soft);
}
.band-tint .reader-block { background: var(--paper); }
.reader-block h3 { font-family: var(--serif); font-weight: 700; font-size: 1.25rem; margin-bottom: 12px; color: var(--accent); }
.reader-block p { color: var(--ink-soft); font-size: 1rem; }
.market-intro { font-size: 1.12rem; color: var(--ink-soft); margin-bottom: 34px; max-width: 68ch; }

.table-wrap { overflow-x: auto; border-radius: 10px; border: 1px solid var(--rule); }
.compare-table { width: 100%; border-collapse: collapse; min-width: 720px; background: var(--paper); font-size: .96rem; }
.compare-table th, .compare-table td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--rule-soft); }
.compare-table thead th { font-family: var(--serif); font-weight: 700; font-size: .98rem; background: var(--paper-3); border-bottom: 2px solid var(--rule); }
.compare-table .th-hl { background: var(--accent); color: #fff; }
.compare-table .td-label { font-weight: 500; color: var(--ink-faint); white-space: nowrap; }
.compare-table .td-hl { background: rgba(156,59,44,.06); font-weight: 500; color: var(--ink); border-left: 1px solid rgba(156,59,44,.16); }
.compare-table tbody tr:last-child td { border-bottom: none; }
.market-punch { margin-top: 32px; font-family: var(--serif); font-size: 1.3rem; color: var(--ink-soft); }
.market-punch strong { color: var(--accent); }

/* ---------- outline ---------- */
.section-desc + .outline-list { margin-top: 8px; }
.outline-list { display: flex; flex-direction: column; gap: 14px; }
.outline-item {
  background: var(--paper); border: 1px solid var(--rule); border-radius: 10px; overflow: hidden;
  transition: box-shadow .3s var(--ease);
}
.outline-item[open] { box-shadow: 0 18px 40px -28px rgba(33,30,24,.35); }
.outline-header {
  list-style: none; cursor: pointer; padding: 24px 28px; display: flex; align-items: baseline; gap: 18px;
  user-select: none;
}
.outline-header::-webkit-details-marker { display: none; }
.outline-header::after {
  content: "＋"; margin-left: auto; color: var(--ink-faint); font-size: 1.2rem; transition: transform .3s, color .3s;
}
.outline-item[open] .outline-header::after { content: "−"; color: var(--accent); }
.part-no {
  font-family: var(--latin-serif); font-style: italic; color: var(--accent); font-size: 1.05rem; flex: none; min-width: 64px;
}
.part-name { font-family: var(--serif); font-weight: 700; font-size: 1.3rem; }
.part-tag { font-size: .85rem; color: var(--ink-faint); border: 1px solid var(--rule); border-radius: 20px; padding: 3px 12px; flex: none; }
.chapter-list { padding: 0 32px 28px 92px; margin: 0; color: var(--ink-soft); }
.chapter-list li { padding: 9px 0; border-top: 1px solid var(--rule-soft); font-size: 1.02rem; line-height: 1.7; }
.chapter-list li b { color: var(--ink); font-weight: 700; }

/* ---------- sample reader ---------- */
.reader { border: 1px solid var(--rule); border-radius: 12px; overflow: hidden; background: var(--paper); }
.reader-tabs { display: flex; flex-wrap: wrap; background: var(--paper-3); border-bottom: 1px solid var(--rule); }
.reader-tab-btn {
  flex: 1 1 auto; background: none; border: none; cursor: pointer; font-family: var(--serif);
  font-weight: 600; font-size: 1.02rem; color: var(--ink-soft); padding: 20px 22px;
  border-bottom: 3px solid transparent; transition: all .25s; line-height: 1.4; text-align: center;
}
.reader-tab-btn small { display: block; font-family: var(--sans); font-weight: 400; font-size: .75rem; color: var(--ink-faint); margin-top: 2px; letter-spacing: .08em; }
.reader-tab-btn:hover { color: var(--accent); background: rgba(156,59,44,.04); }
.reader-tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); background: var(--paper); }
.reader-tab-btn.active small { color: var(--accent); }

.reader-viewport { padding: 56px clamp(24px, 6vw, 80px); }
.reader-panel { max-width: 64ch; margin: 0 auto; animation: fadeUp .5s var(--ease); }
.reader-panel:focus { outline: none; }

.chapter-head { margin-bottom: 36px; padding-bottom: 28px; border-bottom: 1px solid var(--rule); }
.chapter-eyebrow { font-family: var(--latin-serif); font-style: italic; color: var(--accent); letter-spacing: .08em; font-size: .98rem; }
.chapter-title { font-family: var(--serif); font-weight: 900; font-size: clamp(1.9rem, 4vw, 2.6rem); line-height: 1.2; margin: 8px 0 12px; }
.chapter-note { font-size: .98rem; color: var(--ink-faint); font-style: italic; }

.reader-panel p { font-size: 1.12rem; line-height: 2.05; color: var(--ink-soft); margin-bottom: 24px; }
.reader-panel p strong { color: var(--ink); font-weight: 700; }
.reader-panel .dropcap::first-letter {
  font-family: var(--serif); font-weight: 900; font-size: 3.6em; float: left;
  line-height: .82; margin: 6px 14px 0 0; color: var(--accent);
}
.chapter-sub {
  font-family: var(--serif); font-weight: 700; font-size: 1.4rem; color: var(--ink);
  margin: 44px 0 18px; padding-top: 8px;
}
.chapter-quote {
  font-family: var(--serif); font-weight: 600; font-size: clamp(1.3rem, 2.4vw, 1.7rem); line-height: 1.55;
  color: var(--accent); margin: 36px 0; padding: 4px 0 4px 26px; border-left: 4px solid var(--gold);
}
.chapter-bullets { margin: 0 0 24px; padding-left: 24px; }
.chapter-bullets li { font-size: 1.08rem; line-height: 1.9; color: var(--ink-soft); margin-bottom: 10px; }
.chapter-bullets li b { color: var(--ink); }

/* excerpts */
.excerpt { max-width: 64ch; margin: 0 auto 44px; padding-bottom: 40px; border-bottom: 1px solid var(--rule-soft); }
.excerpt:last-child { border-bottom: none; margin-bottom: 0; }
.excerpt-tag { font-family: var(--serif); font-weight: 700; font-size: 1.2rem; color: var(--ink); display: block; }
.excerpt-note { font-size: .92rem; color: var(--ink-faint); font-style: italic; margin: 4px 0 16px; }
.excerpt blockquote {
  font-size: 1.1rem; line-height: 2; color: var(--ink-soft); padding-left: 24px; border-left: 3px solid var(--accent);
}

/* ---------- author ---------- */
.author-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 40px; align-items: start; }
.author-card {
  background: var(--paper); border: 1px solid var(--rule); border-radius: 12px; padding: 38px 34px;
  position: sticky; top: 92px;
}
.author-avatar {
  width: 76px; height: 76px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--gold));
  color: #fff; font-family: var(--latin-serif); font-weight: 600; font-size: 1.6rem; letter-spacing: .04em;
  display: flex; align-items: center; justify-content: center; margin-bottom: 22px;
}
.author-card h3 { font-family: var(--serif); font-weight: 700; font-size: 1.55rem; margin-bottom: 6px; }
.author-role { color: var(--accent); font-size: .96rem; font-weight: 500; margin-bottom: 18px; }
.author-card p { color: var(--ink-soft); font-size: 1.02rem; }

.resource-list { display: flex; flex-direction: column; }
.resource-item { padding: 24px 0; border-bottom: 1px solid var(--rule); }
.resource-item:first-child { padding-top: 0; }
.resource-item:last-child { border-bottom: none; }
.resource-item h4 {
  font-family: var(--serif); font-weight: 700; font-size: 1.2rem; margin-bottom: 8px;
  display: flex; align-items: center; gap: 10px;
}
.resource-item h4::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--gold); flex: none; }
.resource-item p { color: var(--ink-soft); font-size: 1.02rem; }
.resource-item b { color: var(--accent); font-weight: 700; }

.action-strip {
  margin-top: 52px; background: var(--paper); border: 1px solid var(--rule); border-radius: 12px;
  padding: 30px 34px; display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
}
.action-title { font-family: var(--serif); font-weight: 700; font-size: 1.1rem; flex: none; }
.action-chips { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.action-chips li {
  background: var(--paper-3); border: 1px solid var(--rule); border-radius: 20px;
  padding: 7px 16px; font-size: .92rem; color: var(--ink-soft);
}

/* ---------- specs ---------- */
.spec-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-bottom: 28px; }
.spec-item {
  display: flex; flex-direction: column; gap: 6px; padding: 24px 26px;
  background: var(--paper-2); border: 1px solid var(--rule-soft); border-radius: 10px;
}
.spec-k { font-size: .85rem; letter-spacing: .1em; color: var(--ink-faint); }
.spec-v { font-family: var(--serif); font-weight: 600; font-size: 1.2rem; }
.spec-note { color: var(--ink-soft); font-size: 1.05rem; }

/* ---------- contact ---------- */
.band-dark .meta-row span:first-child { color: rgba(250,247,240,.5); }
.contact-grid { display: grid; grid-template-columns: 1.3fr 0.7fr; gap: 48px; margin-top: 40px; align-items: start; }
.pitch-form .field { margin-bottom: 22px; }
.pitch-form label { display: block; font-size: .95rem; font-weight: 500; margin-bottom: 8px; color: var(--paper); }
.pitch-form .req { color: var(--gold); }
.pitch-form input, .pitch-form textarea {
  width: 100%; font-family: var(--sans); font-size: 1rem; color: var(--paper);
  background: rgba(255,255,255,.05); border: 1px solid rgba(250,247,240,.2); border-radius: 6px;
  padding: 14px 16px; transition: border-color .25s, background .25s; resize: vertical;
}
.pitch-form input::placeholder, .pitch-form textarea::placeholder { color: rgba(250,247,240,.38); }
.pitch-form input:focus, .pitch-form textarea:focus {
  outline: none; border-color: var(--gold); background: rgba(255,255,255,.08);
}
.form-status {
  display: none; margin-top: 18px; padding: 14px 18px; border-radius: 6px; font-size: .96rem; line-height: 1.6;
}
.form-status.success {
  display: block; background: rgba(168,133,79,.16); border: 1px solid rgba(168,133,79,.4); color: #e8d8b6;
}

.contact-side { padding-top: 6px; }
.contact-side-title { font-size: .82rem; letter-spacing: .2em; color: rgba(250,247,240,.5); margin-bottom: 18px; }
.contact-link {
  display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--paper);
  padding: 12px 0; border-bottom: 1px solid rgba(250,247,240,.12); font-size: 1rem; transition: color .25s, padding-left .25s;
}
.contact-link:hover { color: var(--gold); padding-left: 6px; }
.contact-link .ci { font-size: 1.1rem; width: 24px; text-align: center; flex: none; }
.contact-cover { margin-top: 28px; border-radius: 6px; overflow: hidden; box-shadow: 0 24px 50px -24px rgba(0,0,0,.6); }

/* ---------- footer ---------- */
#site-footer { background: var(--dark-2); color: rgba(250,247,240,.7); padding: 56px 0; text-align: center; }
.foot-title { font-family: var(--serif); font-weight: 700; font-size: 1.3rem; color: var(--paper); margin-bottom: 8px; }
.foot-meta { font-size: .98rem; margin-bottom: 18px; }
.foot-copy { font-size: .85rem; color: rgba(250,247,240,.4); }

/* ---------- scroll reveal ---------- */
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@media (prefers-reduced-motion: no-preference) {
  .scroll-reveal { animation: revealAnim linear both; animation-timeline: view(); animation-range: entry 0% cover 22%; }
  @keyframes revealAnim { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-cover { order: -1; max-width: 320px; margin: 0 auto; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hstat:nth-child(odd) { border-left: none; }
  .hstat { border-top: 1px solid var(--rule-soft); }
  .hstat:nth-child(1), .hstat:nth-child(2) { border-top: none; }
  .sell-grid, .reader-grid, .author-grid, .contact-grid, .spec-grid { grid-template-columns: 1fr; }
  .author-card { position: static; }
}

@media (max-width: 720px) {
  #navbar {
    position: fixed; top: 68px; left: 0; right: 0; background: var(--paper);
    border-bottom: 1px solid var(--rule); transform: translateY(-120%); transition: transform .38s var(--ease);
    box-shadow: 0 20px 40px -20px rgba(0,0,0,.3);
  }
  #navbar.active { transform: translateY(0); }
  #navbar ul { flex-direction: column; align-items: stretch; padding: 12px; gap: 2px; }
  #navbar a { padding: 14px 16px; }
  #navbar a.nav-cta { margin-left: 0; text-align: center; margin-top: 6px; }
  #menu-toggle { display: block; }
  .band { padding: 68px 0; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-actions .btn { flex: 1 1 auto; }
  .reader-viewport { padding: 36px 22px; }
  .reader-tab-btn { flex: 1 1 100%; border-bottom: 1px solid var(--rule); }
  .reader-tab-btn.active { border-bottom-color: var(--accent); }
  .pull, .chapter-quote { padding-left: 18px; }
  .action-strip { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .hero-stats { grid-template-columns: 1fr; }
  .hstat { border-left: none; }
  .hstat:nth-child(n) { border-top: 1px solid var(--rule-soft); }
  .hstat:first-child { border-top: none; }
}