/* A Prisoner's Escape — page styles. Tokens come from industry.css. */

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

html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--color-bg); color: var(--color-text); font-family: var(--font-body); }
body, .site-nav, .card, .page, .book-base span {
  transition: background-color 200ms ease, border-color 200ms ease;
}
img { max-width: 100%; }
a { color: var(--color-accent-700); text-decoration: none; }
a:hover { color: var(--color-accent-900); }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--color-accent); color: var(--color-bg);
  padding: 10px 16px; font-family: var(--font-heading); letter-spacing: 0.12em; text-transform: uppercase;
}
.skip-link:focus { left: 12px; top: 12px; color: var(--color-bg); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}
fieldset { margin: 0; padding: 0; border: 0; min-width: 0; }

.shell { max-width: 1240px; margin: 0 auto; padding-inline: clamp(16px, 4vw, 32px); }

/* ---------- Nav ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 40;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-neutral-300);
  padding: 0; height: auto;
}
.nav-inner { width: 100%; display: flex; align-items: center; gap: clamp(14px, 2.2vw, 24px); padding-block: 14px; }
.nav-brand { letter-spacing: 0.06em; text-transform: uppercase; color: inherit; white-space: nowrap; }
.nav-links { display: flex; gap: clamp(14px, 2.2vw, 24px); }
.nav-links a,
.nav-cta {
  font-family: var(--font-heading); font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase;
}
.nav-links a { color: inherit; }
.nav-links a:hover { color: var(--color-accent-700); }
.nav-cta { padding: 10px 18px; white-space: nowrap; }
.nav-cta:hover { color: var(--color-bg); }

/* Theme control — a three-way segmented switch on the design system's .seg */
.theme-switch { margin-left: auto; display: flex; align-items: center; }
.theme-switch .seg { border-radius: 0; }
.theme-switch .seg-opt {
  width: 34px; height: 32px; padding: 0;
  display: inline-flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--color-neutral-700);
}
.theme-switch .seg-opt:has(input:checked) { color: var(--color-bg); }
.theme-switch svg { width: 16px; height: 16px; display: block; }
.nav-cta { margin-left: clamp(10px, 1.6vw, 20px); }

@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-inner { gap: 10px; }
  .theme-switch .seg-opt { width: 30px; height: 30px; }
  .nav-cta { padding: 9px 12px; font-size: 12px; }
}
@media (max-width: 360px) {
  .nav-brand { font-size: 12px; }
}

/* ---------- Hero ---------- */
.hero {
  display: grid; grid-template-columns: 1.1fr 1fr;
  gap: clamp(32px, 5vw, 64px); align-items: center;
  padding: clamp(48px, 7vw, 88px) 0 clamp(48px, 6vw, 72px);
}
.hero-tags { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; flex-wrap: wrap; }
.hero-tags .tag { letter-spacing: 0.14em; }
.hero-count { font-family: var(--font-heading); font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--color-accent-700); }
.hero-title {
  font-size: clamp(48px, 8.2vw, 84px); line-height: 0.92; letter-spacing: 0.01em;
  text-transform: uppercase; margin: 0 0 20px;
}
.hero-rule {
  display: flex; align-items: center; gap: 16px; margin: 0 0 28px;
  font-family: var(--font-heading); font-size: clamp(14px, 1.6vw, 18px);
  letter-spacing: 0.32em; text-transform: uppercase; color: var(--color-accent-700);
}
.hero-rule span { height: 1px; width: 56px; flex: none; background: var(--color-accent); }
.hero-lede { font-size: clamp(16px, 1.6vw, 18px); line-height: 1.7; max-width: 46ch; text-wrap: pretty; margin: 0 0 36px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-actions .btn { padding: 14px 26px; font-size: 15px; }

.stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin: clamp(36px, 5vw, 56px) 0 0;
  border-top: 1px solid var(--color-neutral-300); padding-top: 24px;
}
.stats dt { font-family: var(--font-heading); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-accent-700); }
.stats dd { margin: 4px 0 0; font-family: var(--font-heading); font-size: clamp(24px, 3vw, 30px); }

.cover { margin: 0; padding: clamp(16px, 2vw, 26px); background: transparent; }
.cover img { display: block; width: 100%; height: auto; box-shadow: var(--shadow-lg); }
.cover figcaption {
  margin-top: 18px; font-family: var(--font-heading); font-size: 11px; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--color-accent-700);
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; }
  .cover { max-width: 420px; margin-inline: auto; width: 100%; }
}

/* ---------- Pull quote ---------- */
.pull {
  border-top: 1px solid var(--color-neutral-300); border-bottom: 1px solid var(--color-neutral-300);
  padding: clamp(40px, 6vw, 64px) 0;
  display: grid; grid-template-columns: 200px 1fr; gap: clamp(24px, 4vw, 48px); align-items: center;
}
.pull img { width: clamp(110px, 14vw, 160px); height: auto; justify-self: center; opacity: 0.9; filter: var(--illo-filter); mix-blend-mode: var(--illo-blend); }
.pull blockquote { margin: 0; }
.pull blockquote p {
  font-family: var(--font-heading); font-size: clamp(26px, 4vw, 40px); line-height: 1.2;
  margin: 0 0 16px; text-wrap: pretty;
}
.pull cite {
  font-style: normal; font-family: var(--font-heading); font-size: 12px;
  letter-spacing: 0.18em; text-transform: uppercase; color: var(--color-accent-700);
}
@media (max-width: 700px) { .pull { grid-template-columns: 1fr; } }

/* ---------- Section heads ---------- */
.rule-head { display: flex; align-items: baseline; gap: 20px; margin-bottom: 36px; flex-wrap: wrap; }
.rule-head h2, .rule-head-solo { font-size: 15px; letter-spacing: 0.2em; text-transform: uppercase; margin: 0; }
.rule-head > span[aria-hidden] { flex: 1; min-width: 40px; height: 1px; background: var(--color-neutral-300); }
.rule-head-solo { margin-bottom: 28px; }
.spread-label { font-family: var(--font-heading); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-accent-700); }

/* ---------- Movements ---------- */
.movements { padding: clamp(48px, 6vw, 72px) 0; }
.movement-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.movement-grid .card { padding: clamp(24px, 2.6vw, 32px); display: flex; flex-direction: column; gap: 16px; }
.movement-name { font-size: clamp(24px, 2.6vw, 28px); letter-spacing: 0.18em; text-transform: uppercase; margin: 0; }
.movement-grid p { margin: 0; font-size: 15px; line-height: 1.75; color: var(--color-neutral-800); text-wrap: pretty; }
.movement-source {
  margin-top: auto; font-family: var(--font-heading); font-size: 11px;
  letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-accent-700);
}
@media (max-width: 860px) { .movement-grid { grid-template-columns: 1fr; gap: 20px; } }

/* ---------- Sample read ---------- */
.read { padding: 24px 0 clamp(56px, 7vw, 88px); }
.read-hint { margin: 0 0 32px; font-size: 15px; color: var(--color-neutral-800); }
.book-stage { display: flex; justify-content: center; padding: 8px 0 28px; perspective: 2600px; }

.book {
  position: relative; width: 1040px; max-width: 100%;
  aspect-ratio: 1040 / 660;
  container-type: inline-size;
}
.book-base { position: absolute; inset: 0; display: flex; box-shadow: var(--shadow-md); }
.book-base span { flex: 1; background: var(--paper-base); border: 1px solid var(--paper-border); }
.book-base span + span { border-left: none; }
.book-gutter {
  position: absolute; top: 0; bottom: 0; left: 50%; width: 24px; transform: translateX(-12px);
  background: linear-gradient(90deg, transparent 0%, var(--gutter-shade) 45%, var(--gutter-shade) 55%, transparent 100%);
  z-index: 30; pointer-events: none;
}
.leaf {
  position: absolute; top: 0; left: 50%; width: 50%; height: 100%;
  transform-style: preserve-3d; transform-origin: left center;
  transition: transform 900ms cubic-bezier(0.36, 0.05, 0.2, 1);
}
.page {
  position: absolute; inset: 0; backface-visibility: hidden;
  background: var(--paper); border: 1px solid var(--paper-border);
  padding: 5cqw 5.4cqw; overflow: hidden; cursor: pointer;
  display: flex; flex-direction: column; text-align: left;
  font: inherit; color: inherit; width: 100%;
}
.page.back { transform: rotateY(180deg); }
.page-no { font-family: var(--font-heading); font-size: 1.06cqw; letter-spacing: 0.2em; text-transform: uppercase; color: var(--color-accent-700); }
.page-title { color: var(--paper-ink); font-size: 3.27cqw; line-height: 1.1; letter-spacing: 0.04em; text-transform: uppercase; margin: 1.15cqw 0 2.1cqw; }
.page-lines { display: flex; flex-direction: column; gap: 0.29cqw; }
.page-lines span { font-size: 1.45cqw; line-height: 1.7; color: var(--paper-ink); }
.page.is-blank { cursor: default; }

/* Single-page mode for narrow screens */
.book.is-single { width: min(100%, 460px); aspect-ratio: auto; perspective: none; }
.book.is-single .book-base,
.book.is-single .book-gutter { display: none; }
.book.is-single .book-leaves { display: block; }
.book.is-single .leaf {
  position: static; width: 100%; height: auto;
  transform: none; transition: none; display: none;
}
.book.is-single .leaf.is-current { display: block; animation: pageIn 260ms ease both; }
.book.is-single .page {
  position: static; inset: auto; min-height: 420px;
  box-shadow: var(--shadow-md); padding: 32px 28px;
}
.book.is-single .page-no { font-size: 11px; }
.book.is-single .page-title { font-size: 28px; margin: 12px 0 20px; }
.book.is-single .page-lines { gap: 2px; }
.book.is-single .page-lines span { font-size: 15px; line-height: 1.7; }
@keyframes pageIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

/* Half-title printed on the opening left-hand page */
.book-base .half-title {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 1.2cqw; text-align: center; padding: 6cqw;
}
.book-base .half-title b {
  font-family: var(--font-heading); font-weight: var(--font-heading-weight);
  font-size: 2.6cqw; letter-spacing: 0.16em; text-transform: uppercase; color: var(--paper-ink);
}
.book-base .half-title i {
  font-style: normal; font-family: var(--font-heading); font-size: 1.1cqw;
  letter-spacing: 0.24em; text-transform: uppercase; color: var(--color-accent-700);
}

.book-controls { display: flex; align-items: center; justify-content: center; gap: 16px; }
.book-controls .btn-icon { width: 44px; height: 44px; font-size: 16px; }
.spread-status {
  font-family: var(--font-heading); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--color-neutral-700); min-width: 180px; text-align: center;
}
@media (max-width: 700px) { .read .rule-head .spread-label { display: none; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .leaf, body, .site-nav, .card, .page, .book-base span { transition: none; }
  .book.is-single .leaf.is-current { animation: none; }
}

/* ---------- Author ---------- */
.author {
  border-top: 1px solid var(--color-neutral-300);
  padding: clamp(48px, 6vw, 72px) 0;
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 5vw, 64px);
}
.author-lede { font-size: clamp(19px, 2.2vw, 22px); line-height: 1.55; margin: 0 0 20px; max-width: 40ch; text-wrap: pretty; }
.author-body { font-size: 16px; line-height: 1.75; color: var(--color-neutral-800); max-width: 48ch; margin: 0 0 28px; text-wrap: pretty; }
.author .btn-secondary { padding: 12px 22px; }
.link-stack { display: grid; gap: 20px; align-content: start; }
.link-row {
  padding: 24px 28px; display: flex; flex-direction: row; align-items: baseline; gap: 18px;
  text-decoration: none; color: var(--color-text); flex-wrap: wrap;
  transition: background 160ms ease;
}
.link-row:hover { background: var(--color-accent-100); color: var(--color-text); }
.link-kicker { font-family: var(--font-heading); font-size: 11px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--color-accent-700); min-width: 84px; }
.link-label { font-family: var(--font-heading); font-size: clamp(19px, 2vw, 22px); letter-spacing: 0.02em; }
.link-arrow { margin-left: auto; color: var(--color-accent-700); }
@media (max-width: 860px) { .author { grid-template-columns: 1fr; } }
@media (max-width: 560px) {
  .link-row { display: grid; flex-direction: row; grid-template-columns: 1fr auto; align-items: center; gap: 6px 12px; padding: 20px 22px; }
  .link-kicker { grid-column: 1 / -1; min-width: 0; }
  .link-arrow { margin-left: 0; }
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--color-neutral-300);
  padding-top: 28px; padding-bottom: 48px;
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
}
.footer-title { font-family: var(--font-heading); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; }
.footer-credit { font-size: 13px; color: var(--color-neutral-700); }
.footer-link { margin-left: auto; font-family: var(--font-heading); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; }
@media (max-width: 700px) { .footer-link { margin-left: 0; } }