@font-face {
  font-family: Ora Display;
  src: url("assets/aref-ruqaa-ar-700.woff2") format("woff2");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: Ora Arabic;
  src: url("assets/plex-ar-400.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: Ora Arabic;
  src: url("assets/plex-ar-600.woff2") format("woff2");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: Ora Arabic;
  src: url("assets/plex-ar-700.woff2") format("woff2");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  color-scheme: dark;
  --body: "Ora Arabic", Tahoma, Arial, sans-serif;
  --display: "Ora Display", "Traditional Arabic", Georgia, serif;
  --bg: #0d0d0d;
  --surface: #151514;
  --raised: #1a1a19;
  --header: rgb(13 13 13 / 89%);
  --line: #2c2b28;
  --line-strong: #57524a;
  --text: #f4f0e7;
  --muted: #b4aea3;
  --soft: #969084;
  --accent: #f1e9da;
  --accent-text: #191712;
  --gold: #d2b17d;
  --wash: rgb(222 193 143 / 7%);
  --grid: rgb(221 194 148 / 11%);
  --focus: #d9b47d;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --radius: 24px;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f2eb;
  --surface: #fcfaf4;
  --raised: #eae5da;
  --header: rgb(245 242 235 / 90%);
  --line: #dfd9ca;
  --line-strong: #b0a594;
  --text: #1c1a16;
  --muted: #544d43;
  --soft: #686052;
  --accent: #1c1a16;
  --accent-text: #f8f3e8;
  --gold: #806031;
  --wash: rgb(142 108 58 / 9%);
  --grid: rgb(115 85 40 / 14%);
  --focus: #805b27;
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.75 var(--body);
  transition: color .36s var(--ease), background-color .45s var(--ease);
}
img { display: block; max-inline-size: 100%; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { cursor: pointer; }
button, a, input { -webkit-tap-highlight-color: transparent; }
h1, h2, h3, p { margin: 0; }
h1, h2, h3 { line-height: 1.35; }
main { min-block-size: 64vh; }
main:focus, main h1[tabindex]:focus { outline: 0; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 4px; }
.sr-only, .skip-link:not(:focus) {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.skip-link:focus {
  position: fixed;
  inset-block-start: 12px;
  inset-inline-start: 12px;
  z-index: 20;
  padding: 8px 18px;
  border-radius: 12px;
  color: var(--accent-text);
  background: var(--accent);
}
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.icon {
  inline-size: 1.12em;
  block-size: 1.12em;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.wrap { inline-size: min(100% - 3.5rem, 1120px); margin-inline: auto; }

.site-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 5;
  border-block-end: 1px solid var(--line);
  background: var(--header);
  backdrop-filter: blur(16px);
  transition: background-color .4s var(--ease), border-color .3s var(--ease);
}
.header-inner {
  min-block-size: 69px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 18px;
}
.brand { display: inline-flex; justify-self: start; align-items: center; gap: 11px; }
.brand-name {
  padding-inline-start: 11px;
  border-inline-start: 1px solid var(--line-strong);
  font-size: .82rem;
  font-weight: 600;
  color: var(--muted);
}
.logo { display: grid; place-items: center; flex: none; }
.logo img { grid-area: 1 / 1; inline-size: 100%; block-size: auto; transition: opacity .45s var(--ease); }
.logo img:last-child { opacity: 0; }
[data-theme="light"] .logo img:first-child { opacity: 0; }
[data-theme="light"] .logo img:last-child { opacity: 1; }
.logo-small { inline-size: 61px; }
.logo-hero { inline-size: clamp(84px, 11vw, 117px); margin: 19px auto 13px; }
.main-nav, .header-actions { display: flex; align-items: center; gap: 8px; }
.main-nav a {
  display: inline-flex;
  align-items: center;
  min-block-size: 41px;
  border-radius: 999px;
  padding-inline: 17px;
  color: var(--muted);
  font-size: .88rem;
  font-weight: 600;
  transition: color .28s var(--ease), background-color .28s var(--ease);
}
.main-nav a:hover, .main-nav a[aria-current] { background: var(--raised); color: var(--text); }
.header-actions { justify-self: end; }
.icon-button {
  position: relative;
  display: inline-grid;
  place-items: center;
  inline-size: 43px;
  block-size: 43px;
  padding: 0;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 100%;
  background: var(--surface);
  transition: background-color .3s var(--ease), border-color .3s var(--ease), transform .32s var(--ease);
}
.icon-button:hover { border-color: var(--line-strong); transform: translateY(-2px); }
.icon-button svg { grid-area: 1 / 1; }
.theme-toggle svg { transition: transform .42s var(--ease), opacity .3s var(--ease); }
.theme-toggle .moon, [data-theme="light"] .theme-toggle .sun { opacity: 0; transform: rotate(-45deg) scale(.64); }
[data-theme="light"] .theme-toggle .moon { opacity: 1; transform: none; }

.hero { position: relative; isolation: isolate; text-align: center; overflow: hidden; }
.hero-grid {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 50% 24%, var(--wash), transparent 58%),
    radial-gradient(var(--grid) 1px, transparent 1px);
  background-size: auto, 23px 23px;
  mask-image: linear-gradient(#000 15%, #000 51%, transparent 96%);
}
.hero-content { padding-block: clamp(36px, 5vw, 57px) 38px; }
.hero-label, .pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 600;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 999px;
  padding: 4px 13px;
}
.hero-label i, .pill i, .eyebrow i {
  inline-size: 6px;
  block-size: 6px;
  border-radius: 50%;
  background: var(--gold);
  display: inline-block;
  flex: none;
}
.hero h1 {
  font: 700 clamp(3.75rem, 8.3vw, 6.8rem)/1.19 var(--display);
  margin-block: 0 15px;
}
.hero h1 em {
  display: inline-block;
  padding: 0 .18em .24em;
  font-style: normal;
  background: var(--accent);
  color: var(--accent-text);
  border-radius: .21em;
  box-shadow: 0 7px 25px rgb(0 0 0 / 12%);
  transition: color .42s var(--ease), background-color .42s var(--ease);
}
.hero h1 em span { color: #a07e4b; }
.hero-lead { max-inline-size: 55ch; margin-inline: auto; color: var(--muted); font-size: clamp(.98rem, 2.1vw, 1.14rem); }
.hero-search { margin: 23px auto 0; max-inline-size: 550px; }
.search-form {
  min-block-size: 57px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 5px 17px 5px 5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--soft);
  transition: border-color .32s var(--ease), box-shadow .32s var(--ease), background-color .32s var(--ease);
}
.search-form:focus-within { border-color: var(--line-strong); box-shadow: 0 0 0 4px var(--wash); }
.search-form input {
  background: transparent;
  border: 0;
  color: var(--text);
  inline-size: 100%;
  min-inline-size: 0;
  padding: 6px 0;
  outline: none;
}
.search-form input::placeholder { color: var(--soft); opacity: 1; }
.search-form button {
  flex: none;
  color: var(--text);
  background: var(--raised);
  border: 1px solid var(--line);
  min-block-size: 43px;
  border-radius: 999px;
  padding-inline: 20px;
  font-size: .84rem;
  font-weight: 700;
  transition: background-color .3s var(--ease), color .3s var(--ease);
}
.search-form button:hover { color: var(--accent-text); background: var(--accent); }
.hero-meta { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; margin-block-start: 19px; }
.hero-meta a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
  min-block-size: 40px;
  border-radius: 12px;
  padding-inline: 11px;
  font-size: .78rem;
  transition: background-color .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease);
}
.hero-meta a:hover { color: var(--text); border-color: var(--line-strong); background: var(--raised); }
.hero-meta .icon { color: var(--gold); }
.appear { animation: arrive .67s var(--ease) both; }
.appear:nth-child(2) { animation-delay: .055s; }
.appear:nth-child(3) { animation-delay: .11s; }
.appear:nth-child(4) { animation-delay: .16s; }
.appear:nth-child(5) { animation-delay: .21s; }
.appear:nth-child(6) { animation-delay: .26s; }
@keyframes arrive { from { opacity: 0; transform: translateY(13px); } to { opacity: 1; transform: translateY(0); } }

.content-section { margin-block-end: 54px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-block-end: 17px; }
.section-heading h2, .subsection > h2 { font-size: clamp(1.33rem, 2.6vw, 1.95rem); }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--gold);
  font-size: .79rem;
  font-weight: 700;
  margin-block-end: 4px;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-block-size: 35px;
  color: var(--muted);
  font-weight: 600;
  font-size: .88rem;
  white-space: nowrap;
  transition: color .26s var(--ease);
}
.text-link:hover { color: var(--text); }
.text-link .icon, .button .icon { transition: transform .34s var(--ease); }
.text-link:hover .icon, .button:hover .icon { transform: translateX(-2px); }
.tile-grid { display: grid; gap: 15px; }
.tile-grid-two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tile-grid-three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.tile {
  position: relative;
  display: flex;
  min-inline-size: 0;
  min-block-size: 178px;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid #32302b;
  border-radius: var(--radius);
  background: #161615;
  color: #f8f0e3;
  transition: transform .38s var(--ease), border-color .36s var(--ease), box-shadow .36s var(--ease);
}
.tile:hover { transform: translateY(-4px); border-color: #786748; box-shadow: 0 14px 28px rgb(0 0 0 / 15%); }
.tile-art {
  position: absolute;
  z-index: -2;
  inset: 0 auto 0 0;
  inline-size: 66%;
  block-size: 100%;
  object-fit: cover;
  transition: transform .65s var(--ease);
}
.tile:hover .tile-art { transform: scale(1.055); }
.tile::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(270deg, #151514 27%, rgb(21 21 20 / 94%) 36%, transparent 74%);
}
.tile-content {
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 5px;
  padding: 20px 24px 20px 0;
  max-inline-size: 68%;
}
.tile-content strong { font-size: clamp(1.04rem, 2.55vw, 1.55rem); line-height: 1.42; }
.tile-number {
  display: inline-block;
  margin-block-end: 2px;
  border: 1px solid #4b4337;
  border-radius: 999px;
  padding: 2px 9px;
  color: #d9b785;
  font: 600 .71rem/1.6 system-ui, sans-serif;
  letter-spacing: .11em;
}
.tile-note { color: #c4b8a7; font-size: .86rem; }
.tile-arrow {
  position: absolute;
  inset-inline-end: 13px;
  inset-block-end: 13px;
  display: grid;
  place-items: center;
  inline-size: 35px;
  block-size: 35px;
  border: 1px solid #756955;
  border-radius: 50%;
  background: #191817;
  color: #f2e7d6;
  transition: transform .34s var(--ease);
}
.tile:hover .tile-arrow { transform: translateX(-3px); }
.track-tile { min-block-size: 212px; align-items: end; }
.track-tile .tile-art { inline-size: 100%; block-size: 100%; object-position: center 46%; }
.track-tile::after { background: linear-gradient(0deg, #141412 2%, rgb(18 18 16 / 83%) 28%, transparent 72%); }
.track-tile .tile-content { padding: 13px 17px 16px 0; max-inline-size: calc(100% - 54px); }
.track-tile strong { font-size: clamp(1.04rem, 2vw, 1.25rem); }

.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; margin-block-start: 17px; }
.button {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid var(--line);
  padding: 8px 16px;
  min-block-size: 45px;
  border-radius: 999px;
  color: var(--text);
  background: var(--surface);
  font-weight: 700;
  font-size: .87rem;
  transition: background-color .3s var(--ease), color .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
}
.button:hover { transform: translateY(-2px); border-color: var(--line-strong); }
.button-primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.button-primary:hover { box-shadow: 0 5px 16px var(--wash); }
.button-quiet:hover { background: var(--raised); }
.book-card, .book-header {
  display: grid;
  align-items: center;
  grid-template-columns: minmax(118px, 160px) minmax(0, 1fr);
  gap: clamp(16px, 4vw, 32px);
  padding: clamp(15px, 3vw, 25px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.book-card-body { min-inline-size: 0; }
.book-card h3 { font-size: clamp(1.25rem, 3vw, 1.6rem); margin-block: 8px 3px; }
.book-card p { color: var(--muted); font-size: .9rem; }
.book-card .button { margin-block-start: 10px; }
.status-pill { color: var(--gold); }
.book-cover {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: linear-gradient(145deg, #302b22, #181614 66%);
  color: #f5ead7;
  border: 1px solid #665840;
  border-radius: 15px;
  aspect-ratio: 4 / 5;
  display: grid;
  place-content: center;
  justify-items: center;
  text-align: center;
}
.book-cover::before, .book-cover::after {
  content: "";
  position: absolute;
  z-index: -1;
  border: 1px solid #7a6747;
  border-radius: 50%;
  inline-size: 160%;
  block-size: 94%;
  inset: 40% -30% auto;
  transform: rotate(-28deg);
}
.book-cover::after { inset-block-start: 51%; border-color: #574831; }
.book-cover > span { color: #e2c693; direction: ltr; font: 600 .52rem/1.4 system-ui, sans-serif; letter-spacing: .15em; }
.book-cover i { display: inline-block; width: 3px; height: 3px; margin: 0 3px 2px; background: currentColor; border-radius: 50%; }
.book-cover strong { font: 700 clamp(2.1rem, 6vw, 4rem)/1.45 var(--body); }
.book-cover small { color: #e1d4bc; font-size: .86rem; }

.inner-page { padding-block: 25px 64px; animation: arrive .42s var(--ease) both; }
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 11px;
  margin-block-end: 23px;
  color: var(--muted);
  font-size: .82rem;
}
.breadcrumbs a { padding-block: 4px; }
.breadcrumbs a:hover { text-decoration: underline; text-underline-offset: 4px; }
.breadcrumbs [aria-current] { color: var(--text); }
.crumb-separator { color: var(--soft); }
.page-heading h1 { font: 700 clamp(2.65rem, 6.2vw, 4.65rem)/1.19 var(--display); overflow-wrap: anywhere; }
.page-heading p:not(.eyebrow) { color: var(--muted); margin-block-start: 9px; }
.choices {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  margin-block: 20px 0;
}
.choice {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-block-size: 43px;
  padding: 6px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: var(--surface);
  font-size: .85rem;
  font-weight: 600;
  transition: background-color .3s var(--ease), border-color .3s var(--ease), color .3s var(--ease);
}
.choice:hover { color: var(--text); border-color: var(--line-strong); }
.choice.selected { color: var(--accent-text); background: var(--accent); border-color: var(--accent); }
.subsection { margin-block-start: 31px; min-inline-size: 0; }
.subsection > h2 { margin-block-end: 14px; }
.empty {
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  text-align: center;
  padding: 34px 17px;
  margin-block-start: 12px;
}
.empty-icon, .list-icon {
  display: grid;
  place-items: center;
  inline-size: 42px;
  block-size: 42px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--raised);
  color: var(--gold);
  flex: none;
}
.empty-icon { margin: 0 auto 12px; }
.empty h2 { font-size: 1.2rem; }
.empty p, .small-note { color: var(--muted); margin-block: 7px 12px; }
.small-note { font-size: .86rem; margin-block-start: 12px; }
.inner-page > .search-form { max-inline-size: 620px; margin-block-start: 19px; }
.search-count { color: var(--muted); margin-block-end: 12px; overflow-wrap: anywhere; }
.link-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.link-list a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  min-block-size: 67px;
  padding: 9px 11px;
  border-radius: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  transition: background-color .3s var(--ease), border-color .3s var(--ease);
}
.link-list a:hover { border-color: var(--line-strong); background: var(--raised); }
.link-list strong { display: block; line-height: 1.45; }
.link-list small { color: var(--soft); font-size: .81rem; }
.link-list a > .icon { color: var(--gold); }
.source-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 13px; margin-block-start: 24px; }
.source-card {
  display: flex;
  flex-direction: column;
  align-items: start;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}
.source-card .list-icon { margin-block-end: 12px; }
.source-card h2 { font-size: 1.21rem; }
.source-card p:not(.eyebrow) { color: var(--muted); font-size: .91rem; margin-block: 9px 13px; }
.source-card .text-link { margin-block-start: auto; }
.notice {
  display: flex;
  gap: 13px;
  align-items: center;
  margin-block-start: 20px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
}
.notice h2 { font-size: 1rem; }
.notice p { color: var(--muted); font-size: .88rem; }
.book-sections { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 17px; }
.book-header .page-heading > h1 { font-family: var(--body); font-size: clamp(1.6rem, 6vw, 3.2rem); }
.chapter-number { font-weight: 700; }

.reader-page { max-inline-size: 870px; }
.reader-page .breadcrumbs { margin-block-end: 12px; }
.reader-heading { display: flex; justify-content: space-between; flex-wrap: wrap; align-items: end; gap: 6px 14px; }
.reader-heading h1 { font: 700 clamp(1.45rem, 3.4vw, 2.3rem)/1.35 var(--body); }
.reader-heading .button-row { margin-block-start: 0; }
.reader-controls { margin-block: 14px 10px; }
.page-picker { gap: 5px; }
.page-picker > span { color: var(--muted); margin-inline-end: 5px; font-size: .83rem; }
.page-picker .choice { min-inline-size: 43px; padding-inline: 8px; }
.math-key { color: var(--muted); margin-block: 0 12px; font-size: .83rem; }
.math-key strong { color: var(--text); margin-inline-end: 8px; }
.formula { font: 600 .98em/1.55 "Cambria Math", "Segoe UI", Arial, sans-serif; overflow-wrap: anywhere; }
.math-key .formula { color: var(--text); }
.solution-sheet {
  color-scheme: light;
  --surface: #fff;
  --raised: #f1eee6;
  --line: #ddd9d0;
  --line-strong: #c6bdb0;
  --text: #232019;
  --muted: #514c43;
  --gold: #755725;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: clamp(12px, 2vw, 21px);
  box-shadow: 0 15px 42px rgb(0 0 0 / 10%);
}
.answer-group + .answer-group { margin-block-start: 15px; }
.answer-group h2 { font-size: 1rem; margin-block-end: 4px; color: var(--gold); }
.answer-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.answer-row {
  display: grid;
  grid-template-columns: 2.1rem minmax(0, 1fr);
  gap: 7px;
  padding-block: 7px;
  border-block-end: 1px solid var(--line);
}
.answer-row:last-child { border-block-end: 0; }
.question-text { color: var(--text); font-size: .95rem; line-height: 1.65; font-weight: 600; }
.exercise-number {
  text-align: center;
  color: var(--gold);
  font-weight: 700;
  font-size: .88rem;
  padding-block-start: 1px;
}
.answer-copy { min-inline-size: 0; overflow-wrap: anywhere; }
.solution-text { color: var(--muted); font-size: .89rem; line-height: 1.65; }
.solution-label { color: var(--gold); font-size: .76rem; font-weight: 700; margin-inline-end: 3px; }
.solution-text strong { color: var(--text); }
.solution-reason::before { content: " · "; margin-inline: 2px; }
.plot { display: block; inline-size: min(100%, 230px); block-size: auto; margin-block-start: 9px; color: var(--gold); direction: ltr; }
.number-line { inline-size: min(100%, 490px); }
.plot .axis { fill: none; stroke: var(--muted); stroke-width: 1; }
.plot .plot-grid { fill: none; stroke: var(--line-strong); stroke-width: .5; }
.plot .plot-series, .plot line { stroke: currentColor; stroke-width: 1.4; }
.plot circle { fill: currentColor; stroke: var(--surface); stroke-width: .6; }
.plot text { fill: var(--text); font: 600 11px system-ui, sans-serif; text-anchor: middle; }
.membership-table { border-collapse: collapse; margin-block-start: 10px; max-inline-size: 100%; font-size: .88rem; }
.membership-table :is(th, td) { text-align: start; border: 1px solid var(--line); padding: 5px 8px; }
.membership-table th { background: var(--raised); }
.reader-pagination { display: flex; justify-content: space-between; gap: 12px; margin-block-start: 22px; }

.site-footer { border-block-start: 1px solid var(--line); background: var(--surface); }
.footer-inner, .footer-bottom { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 19px; }
.footer-inner { padding-block: 24px; }
.footer-inner p, .footer-bottom { color: var(--soft); font-size: .83rem; }
.footer-inner nav { display: flex; flex-wrap: wrap; gap: 7px 18px; color: var(--muted); font-size: .88rem; }
.footer-inner nav a:hover { color: var(--text); text-decoration: underline; text-underline-offset: 4px; }
.footer-bottom { border-block-start: 1px solid var(--line); padding-block: 12px; }

@media (max-width: 760px) {
  .wrap { inline-size: min(100% - 2rem, 1120px); }
  .header-inner { gap: 9px; }
  .main-nav { gap: 2px; }
  .main-nav a { padding-inline: 10px; }
  .tile-grid-three, .source-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tile-content { padding-inline-start: 15px; max-inline-size: 75%; }
  .track-tile .tile-content { max-inline-size: calc(100% - 46px); }
  .tile-arrow { inset-inline-end: 8px; inset-block-end: 8px; inline-size: 31px; block-size: 31px; }
  .book-sections { grid-template-columns: 1fr; gap: 0; }
}

@media (max-width: 490px) {
  .wrap { inline-size: calc(100% - 1.5rem); }
  .header-inner { grid-template-columns: 1fr auto; gap: 0 8px; padding-block: 8px 4px; }
  .header-actions { grid-column: 2; grid-row: 1; }
  .main-nav { grid-column: 1 / -1; justify-content: center; padding-block-start: 3px; }
  .main-nav a { padding-inline: 17px; }
  .hero-content { padding-block: 32px 33px; }
  .hero h1 { font-size: clamp(2.92rem, 13vw, 4.1rem); }
  .hero-lead { max-inline-size: 33ch; }
  .hero-search { margin-block-start: 17px; }
  .search-form { gap: 8px; padding-inline-start: 12px; }
  .search-form input { font-size: .88rem; }
  .search-form button { padding-inline: 13px; }
  .hero-meta { gap: 5px; margin-block-start: 13px; }
  .hero-meta a { min-block-size: 38px; font-size: .7rem; padding-inline: 7px; }
  .tile-grid-two, .source-grid { grid-template-columns: minmax(0, 1fr); }
  .tile-grid { gap: 10px; }
  .wide-tile { min-block-size: 146px; }
  .tile-content strong { font-size: 1.22rem; }
  .track-tile { min-block-size: 164px; }
  .track-tile strong { font-size: .98rem; }
  .content-section { margin-block-end: 33px; }
  .book-card { grid-template-columns: minmax(82px, 29%) minmax(0, 1fr); gap: 12px; }
  .book-card .button { min-block-size: 42px; padding-inline: 12px; }
  .book-header { grid-template-columns: minmax(67px, 24%) minmax(0, 1fr); gap: 10px; align-items: start; }
  .book-header .book-cover { margin-block-start: 4px; }
  .book-cover > span { font-size: .42rem; }
  .book-cover strong { font-size: 1.8rem; }
  .book-header .button-row { margin-inline-start: calc(-36% - 10px); }
  .answer-row { grid-template-columns: 1.75rem minmax(0, 1fr); gap: 5px; }
  .reader-controls > span { display: none; }
  .reader-controls .choice { min-inline-size: 38px; min-block-size: 40px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-delay: 0ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

@media print {
  :root, :root[data-theme="light"] {
    color-scheme: light;
    --bg: #fff;
    --surface: #fff;
    --raised: #f5f1e8;
    --line: #c8c0b1;
    --line-strong: #b0a594;
    --text: #161410;
    --muted: #292620;
    --gold: #66471f;
  }
  .site-header, .site-footer, .skip-link, .breadcrumbs, .reader-controls, .reader-pagination, .reader-page .button-row { display: none; }
  .wrap { inline-size: 100%; }
  .inner-page { animation: none; padding: 0; }
  .reader-page h1 { font-size: 27pt; }
  .solution-sheet { padding: 0; border: 0; box-shadow: none; }
  .answer-row, .plot { break-inside: avoid; }
  .answer-group h2 { break-after: avoid; }
  .solution-text { font-size: .81rem; }
}