:root {
  color-scheme: light;
  --ink: #17201c;
  --muted: #5d6862;
  --paper: #f7f5ef;
  --surface: #fffef9;
  --rule: #d7d4ca;
  --accent: #315b48;
  --accent-dark: #234333;
  --max: 72rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 1.08rem;
  line-height: 1.68;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent-dark); text-underline-offset: .18em; }
a:hover { color: var(--accent); }
a:focus-visible { outline: 3px solid #b78e45; outline-offset: 3px; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: .5rem;
  background: var(--ink);
  color: white;
  padding: .65rem 1rem;
  z-index: 10;
}
.skip-link:focus { left: .5rem; }

.site-header, .site-footer { font-family: ui-sans-serif, system-ui, sans-serif; }
.site-header { border-bottom: 1px solid var(--rule); background: rgba(247,245,239,.96); }
.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
}
.brand { color: var(--ink); font-weight: 700; letter-spacing: .02em; text-decoration: none; }
.nav-links { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; justify-content: flex-end; }
.nav-links a { color: var(--muted); font-size: .92rem; text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--ink); text-decoration: underline; }

main { max-width: var(--max); margin: 0 auto; padding: 4.5rem 1.5rem 5rem; }
.hero { max-width: 52rem; padding: 2rem 0 4.5rem; }
.eyebrow {
  margin: 0 0 .75rem;
  color: var(--accent);
  font: 700 .77rem/1.3 ui-sans-serif, system-ui, sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
}
h1, h2, h3 { line-height: 1.16; text-wrap: balance; }
h1 { margin: 0 0 1.25rem; font-size: clamp(2.5rem, 7vw, 5.2rem); letter-spacing: -.035em; }
h2 { margin: 0 0 1rem; font-size: clamp(1.75rem, 4vw, 2.6rem); letter-spacing: -.02em; }
h3 { margin: 0 0 .55rem; font-size: 1.42rem; }
.lede { margin: 0; max-width: 46rem; color: #39443f; font-size: clamp(1.18rem, 2.4vw, 1.48rem); line-height: 1.55; }
.section { border-top: 1px solid var(--rule); padding: 3.5rem 0; }
.section-head { max-width: 44rem; margin-bottom: 2rem; }
.section-head p { color: var(--muted); }
.books { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.book-card { display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--rule); padding: 1.5rem; min-height: 19rem; }
.book-card .number { color: var(--muted); font: .78rem/1 ui-sans-serif, system-ui, sans-serif; letter-spacing: .1em; }
.book-card p { color: var(--muted); font-size: 1rem; }
.book-card .card-link { margin-top: auto; font-family: ui-sans-serif, system-ui, sans-serif; font-weight: 650; }
.pair-link { font: .9rem/1.4 ui-sans-serif, system-ui, sans-serif; }
.book-layout { display: grid; grid-template-columns: minmax(0, 2fr) minmax(16rem, 1fr); gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.book-title h1 { font-size: clamp(2.35rem, 6vw, 4.6rem); }
.subtitle { color: var(--muted); font-size: clamp(1.12rem, 2.2vw, 1.38rem); font-style: italic; }
.prose { max-width: 45rem; }
.prose p { margin: 0 0 1.2rem; }
.details { background: var(--surface); border-top: 4px solid var(--accent); padding: 1.4rem; }
.details dl { margin: 0; }
.details dt { margin-top: 1rem; color: var(--muted); font: 700 .73rem/1.3 ui-sans-serif, system-ui, sans-serif; letter-spacing: .08em; text-transform: uppercase; }
.details dt:first-child { margin-top: 0; }
.details dd { margin: .2rem 0 0; }
.actions { display: flex; gap: .75rem; flex-wrap: wrap; margin-top: 1.8rem; }
.button { display: inline-block; border: 1px solid var(--accent-dark); padding: .62rem .9rem; font: 650 .9rem/1.3 ui-sans-serif, system-ui, sans-serif; text-decoration: none; }
.button.primary { background: var(--accent-dark); color: white; }
.language-note { color: var(--muted); font: .88rem/1.5 ui-sans-serif, system-ui, sans-serif; }
.site-footer { border-top: 1px solid var(--rule); }
.footer-inner { max-width: var(--max); margin: 0 auto; padding: 1.6rem 1.5rem; display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; color: var(--muted); font-size: .83rem; }
.footer-inner p { margin: 0; }

@media (max-width: 760px) {
  .nav { align-items: flex-start; }
  .nav-links { gap: .6rem .9rem; }
  main { padding-top: 2.5rem; }
  .hero { padding-top: 1rem; }
  .books, .book-layout { grid-template-columns: 1fr; }
  .book-card { min-height: 0; }
}

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