/* Librox site — the app's design system, translated to CSS.
   Source of truth: Libros/Sources/LibrosStyle.swift + ReaderTheme.
   One ink, six alphas. One accent ("bookcloth"). Hairlines, never cards. */

/* ---------- Themes (mirror the app's three reader themes) ---------- */
:root {
  color-scheme: light dark;
  /* Paper — the default, matches ReaderTheme paper */
  --bg: #FAF5E9;
  --ink: #2B2620;
  --accent: #8A4B2F;        /* bookcloth, light variant */
  --on-accent: #FBF3E6;
  --accent-soft-a: 12%;
  --grain-opacity: 0.5;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #0E0C0B;
    --ink: #E8E2D6;
    --accent: #E0A183;      /* bookcloth, dark variant */
    --on-accent: #2A1408;
    --accent-soft-a: 16%;
    --grain-opacity: 0.22;
  }
}
/* Scoped to :root — the theme chips carry data-theme attributes too,
   and a bare [data-theme] selector would re-theme each chip after itself. */
:root[data-theme="paper"] {
  --bg: #FAF5E9; --ink: #2B2620;
  --accent: #8A4B2F; --on-accent: #FBF3E6;
  --accent-soft-a: 12%; --grain-opacity: 0.5;
}
:root[data-theme="eink"] {
  --bg: #FBFAF6; --ink: #171512;
  --accent: #8A4B2F; --on-accent: #FBF3E6;
  --accent-soft-a: 10%; --grain-opacity: 0.35;
}
:root[data-theme="dark"] {
  --bg: #0E0C0B; --ink: #E8E2D6;
  --accent: #E0A183; --on-accent: #2A1408;
  --accent-soft-a: 16%; --grain-opacity: 0.22;
}

/* ---------- Ink ramp — named steps, use these, not raw numbers ---------- */
:root {
  --ink-label:     color-mix(in srgb, var(--ink) 70%, transparent);
  --ink-furniture: color-mix(in srgb, var(--ink) 52%, transparent);
  --ink-border:    color-mix(in srgb, var(--ink) 18%, transparent);
  --ink-chipline:  color-mix(in srgb, var(--ink) 14%, transparent);
  --ink-hairline:  color-mix(in srgb, var(--ink) 10%, transparent);
  --ink-fill:      color-mix(in srgb, var(--ink) 6%, transparent);
  --accent-soft:   color-mix(in srgb, var(--accent) var(--accent-soft-a), transparent);

  /* Two families, same rule as the app: serif for language from the book,
     the system face for the app talking about the book. ui-serif renders as
     New York on Apple devices — the audience of an iPhone/iPad app page. */
  --serif: ui-serif, "New York", "Iowan Old Style", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, ui-sans-serif, "Segoe UI", sans-serif;

  --radius-cover: 3px;
  --radius-button: 12px;
  --radius-sheet: 22px;
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color .35s ease, color .35s ease;
}
/* Paper grain — barely-there, like the page texture in the app's themes. */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  opacity: calc(var(--grain-opacity) * 0.08);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  z-index: 1;
}
main, header.site, footer.site { position: relative; z-index: 2; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

.shell { max-width: 64rem; margin: 0 auto; padding: 0 20px; }
.prose { max-width: 42rem; }

/* ---------- Type roles ---------- */
.serif { font-family: var(--serif); }
.eyebrow {
  font-family: var(--sans);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-label);
}
h1, h2, h3 { font-family: var(--serif); font-weight: 500; letter-spacing: -0.014em; margin: 0; }
p { margin: 0.75em 0; }

.hairline { border: 0; border-top: 1px solid var(--ink-hairline); margin: 0; }

/* ---------- Header ---------- */
header.site {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 28px 0 0;
}
.wordmark {
  font-family: var(--serif);
  font-size: 1.05rem; font-weight: 600;
  letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ink); text-decoration: none;
}
nav.site-links { display: flex; gap: 22px; }
nav.site-links a {
  font-size: 0.82rem; color: var(--ink-label); text-decoration: none;
}
nav.site-links a:hover { color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 48px;
  align-items: center;
  padding: 72px 0 84px;
}
.hero h1 {
  font-size: clamp(2.5rem, 5.6vw, 3.9rem);
  line-height: 1.08;
  margin: 14px 0 0;
}
.hero .lede {
  font-size: 1.06rem;
  color: var(--ink-label);
  max-width: 33rem;
  margin-top: 20px;
}
.cta-row { display: flex; align-items: center; gap: 18px; margin-top: 34px; flex-wrap: wrap; }
.btn-accent {
  display: inline-block;
  font-family: var(--sans); font-size: 0.92rem; font-weight: 600;
  color: var(--on-accent); background: var(--accent);
  border: 0; border-radius: 14px;
  padding: 14px 22px;
  text-decoration: none;
  cursor: pointer;
  transition: transform .18s ease, filter .18s ease;
}
.btn-accent:hover { transform: translateY(-1px); filter: brightness(1.06); }
.cta-note { font-size: 0.8rem; color: var(--ink-furniture); }

/* ---------- Phone mock: the reader page, drawn in CSS ---------- */
.phone-wrap { display: flex; flex-direction: column; align-items: center; gap: 22px; }
.phone {
  width: min(290px, 78vw);
  aspect-ratio: 9 / 19;
  border: 1px solid var(--ink-border);
  border-radius: 42px;
  background: var(--bg);
  box-shadow:
    0 1px 2px color-mix(in srgb, var(--ink) 8%, transparent),
    0 24px 60px -24px color-mix(in srgb, var(--ink) 28%, transparent);
  padding: 16px 20px 18px;
  display: flex; flex-direction: column;
  transform: rotate(1.2deg);
  transition: background-color .35s ease;
}
.phone .page-head {
  display: flex; justify-content: center;
  padding: 14px 0 16px;
}
.phone .page-head .eyebrow { font-size: 0.5rem; }
.phone .page-body {
  flex: 1;
  font-family: var(--serif);
  font-size: 0.74rem;
  line-height: 1.75;
  overflow: hidden;
}
.phone .page-body p { margin: 0 0 0.9em; }
.phone .page-body .drop {
  font-size: 1.5em; font-weight: 600;
}
.phone .spoken {
  background: var(--accent-soft);
  border-radius: 3px;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  padding: 0 2px;
}
.phone .page-foot {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 12px;
}
.phone .page-foot span { font-size: 0.52rem; color: var(--ink-furniture); letter-spacing: 0.08em; }
.phone .progress { height: 1px; background: var(--ink-hairline); position: relative; margin-top: 10px; }
.phone .progress i { position: absolute; inset: 0 78% 0 0; background: var(--accent); }

/* ---------- Theme chips (the app's LibrosChip, one size everywhere) ---------- */
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  font-family: var(--sans); font-size: 0.78rem; font-weight: 500;
  color: color-mix(in srgb, var(--ink) 62%, transparent);
  background: none;
  border: 1px solid var(--ink-chipline);
  border-radius: 999px;
  padding: 12px 15px;
  cursor: pointer;
  transition: color .2s ease, background-color .2s ease, border-color .2s ease;
}
.chip:hover { border-color: var(--ink-furniture); }
.chip[aria-pressed="true"], .chip[aria-checked="true"] {
  color: var(--on-accent);
  background: var(--accent);
  border-color: var(--accent);
}
.chip-caption { font-size: 0.74rem; color: var(--ink-furniture); text-align: center; }

/* ---------- Feature rows — hairlines, never cards ---------- */
.features { padding: 10px 0 40px; }
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 56px;
}
.feature {
  border-top: 1px solid var(--ink-hairline);
  padding: 26px 0 30px;
}
.feature h3 { font-size: 1.35rem; margin: 10px 0 8px; }
.feature p { color: var(--ink-label); font-size: 0.93rem; margin: 0; }

/* ---------- Discover / search ---------- */
.discover { padding: 56px 0 30px; }
.discover-head h2 { font-size: clamp(1.9rem, 3.6vw, 2.6rem); margin: 12px 0 10px; }
.discover-head p { color: var(--ink-label); max-width: 36rem; }

.search-bar {
  display: flex; align-items: center; gap: 14px;
  border-bottom: 1px solid var(--ink-border);
  margin: 34px 0 20px;
  max-width: 42rem;
}
.search-bar input {
  flex: 1;
  font-family: var(--serif);
  font-size: 1.35rem;
  color: var(--ink);
  background: none; border: 0;
  padding: 10px 0 14px;
}
.search-bar input::placeholder { color: var(--ink-furniture); opacity: 1; }
.search-bar input:focus { outline: none; }
.search-bar .go {
  font-family: var(--sans); font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); background: none; border: 0; cursor: pointer;
  padding: 10px 2px 14px;
}

.search-status { font-size: 0.82rem; color: var(--ink-furniture); min-height: 1.4em; margin: 14px 0 4px; }

.results { list-style: none; margin: 10px 0 0; padding: 0; max-width: 46rem; }
.result {
  display: grid;
  grid-template-columns: 66px minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  border-top: 1px solid var(--ink-hairline);
  padding: 18px 0;
}
.result:last-child { border-bottom: 1px solid var(--ink-hairline); }

/* Tinted cover — deterministic from the title, same six tints as the app */
.cover {
  width: 66px; height: 99px;
  border-radius: var(--radius-cover);
  overflow: hidden;
  position: relative;
  background: var(--cover-tint, #2F4A4A);
  box-shadow: 0 1px 3px color-mix(in srgb, var(--ink) 25%, transparent);
  flex-shrink: 0;
}
.cover .initial {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--serif); font-size: 1.6rem; font-weight: 500;
  color: rgba(251, 243, 230, 0.92);
}
.cover img {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
}

.result .meta { min-width: 0; }
.result .meta .eyebrow { font-size: 0.58rem; }
.result .title {
  font-family: var(--serif); font-size: 1.02rem; font-weight: 500;
  letter-spacing: -0.014em; line-height: 1.3;
  margin: 5px 0 2px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.result .author { font-size: 0.82rem; color: var(--ink-label); }

.result .actions { display: flex; flex-direction: column; gap: 8px; align-items: stretch; }
.btn-add {
  font-family: var(--sans); font-size: 0.8rem; font-weight: 600;
  color: var(--on-accent); background: var(--accent);
  border-radius: 999px; border: 0;
  padding: 10px 16px;
  text-align: center; text-decoration: none;
  white-space: nowrap;
}
.btn-add:hover { filter: brightness(1.06); }
.btn-epub {
  font-family: var(--sans); font-size: 0.72rem; font-weight: 500;
  color: color-mix(in srgb, var(--ink) 62%, transparent);
  border: 1px solid var(--ink-chipline);
  border-radius: 999px;
  padding: 7px 16px;
  text-align: center; text-decoration: none;
  white-space: nowrap;
}
.btn-epub:hover { border-color: var(--ink-furniture); }

.discover-foot { font-size: 0.8rem; color: var(--ink-furniture); max-width: 42rem; margin-top: 26px; }

/* ---------- Inner pages (privacy, support) ---------- */
.page { padding: 56px 0 70px; }
.page h1 { font-size: clamp(2rem, 4.4vw, 2.8rem); margin: 12px 0 6px; }
.page h2 { font-size: 1.3rem; margin: 2.2em 0 0.4em; }
.page .updated { font-size: 0.82rem; color: var(--ink-furniture); font-style: italic; }
.page p, .page li { color: color-mix(in srgb, var(--ink) 86%, transparent); font-size: 0.97rem; }
.page ul { padding-left: 1.2rem; line-height: 1.9; }

/* ---------- Footer ---------- */
footer.site { padding: 26px 0 40px; margin-top: 40px; }
footer.site .inner {
  display: flex; justify-content: space-between; align-items: baseline;
  flex-wrap: wrap; gap: 12px;
  border-top: 1px solid var(--ink-hairline);
  padding-top: 22px;
}
footer.site a { color: var(--ink-label); text-decoration: none; font-size: 0.82rem; margin-right: 18px; }
footer.site a:hover { color: var(--accent); }
footer.site .copy { font-size: 0.78rem; color: var(--ink-furniture); }

/* ---------- Load reveal ---------- */
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: none; }
}
.reveal { animation: rise 0.7s cubic-bezier(0.22, 1, 0.36, 1) both; }
.reveal.d1 { animation-delay: 0.08s; }
.reveal.d2 { animation-delay: 0.16s; }
.reveal.d3 { animation-delay: 0.26s; }
.reveal.d4 { animation-delay: 0.38s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { animation: none; }
  html { scroll-behavior: auto; }
  .phone { transform: none; }
}

/* ---------- Small screens ---------- */
@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; gap: 40px; padding: 44px 0 56px; }
  .phone-wrap { order: 2; }
  .feature-grid { grid-template-columns: 1fr; }
  .result { grid-template-columns: 52px minmax(0, 1fr); }
  .cover { width: 52px; height: 78px; }
  .result .actions { grid-column: 2; flex-direction: row; }
  header.site { flex-direction: column; gap: 10px; align-items: flex-start; }
}