:root {
  --book-ink: #182a32;
  --book-text: #32474f;
  --book-muted: #64747a;
  --book-paper: #ffffff;
  --book-soft: #f2f6f4;
  --book-line: #d5dfdc;
  --book-navy: #171843;
  --book-coral: #d66b57;
  --book-gold: #f1c85a;
  --book-teal: #087881;
  --book-teal-dark: #07575e;
  --book-header-height: 66px;
  --book-page-width: 1120px;
  --book-serif: Georgia, "Times New Roman", serif;
  --book-sans: Aptos, "Segoe UI", Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--book-header-height) + 24px);
}

body.book-page {
  margin: 0;
  padding: 0;
  color: var(--book-text);
  background: var(--book-paper);
  font-family: var(--book-sans);
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.book-page a {
  color: var(--book-teal-dark);
  text-underline-offset: 3px;
}

.book-page a:hover {
  color: var(--book-teal);
}

.book-page a:focus-visible,
.book-page button:focus-visible {
  outline: 3px solid var(--book-gold);
  outline-offset: 3px;
}

/* Book hero */

#main {
  padding: 0;
}

.book-hero {
  position: relative;
  min-height: 570px;
  overflow: hidden;
  color: #fff;
  background: var(--book-navy);
  border-top: 4px solid var(--book-coral);
}

.book-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  min-height: 566px;
  gap: 64px;
  align-items: center;
  padding-top: 48px;
  padding-bottom: 48px;
}

.book-hero-copy {
  max-width: 700px;
}

.book-kicker {
  margin: 0 0 13px;
  color: var(--book-gold);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.3;
  text-transform: uppercase;
}

.book-hero h1 {
  max-width: 710px;
  margin: 0;
  color: #fff;
  font-family: var(--book-serif);
  font-size: 52px;
  font-weight: 700;
  line-height: 1.04;
}

.book-subtitle {
  max-width: 670px;
  margin: 17px 0 0;
  color: #f2cf75;
  font-family: var(--book-serif);
  font-size: 23px;
  font-weight: 600;
  line-height: 1.35;
}

.book-author {
  margin: 17px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
  font-weight: 700;
}

.book-lead {
  max-width: 650px;
  margin: 23px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 17px;
  line-height: 1.65;
}

.book-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.book-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 15px;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
}

.book-page .book-button-primary {
  color: var(--book-navy);
  background: var(--book-gold);
  border-color: var(--book-gold);
}

.book-page .book-button-primary:hover {
  color: var(--book-navy);
  background: #ffe18e;
  border-color: #ffe18e;
}

.book-page .book-button-secondary {
  color: #fff;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.45);
}

.book-page .book-button-secondary:hover {
  color: #fff;
  border-color: #fff;
}

.book-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 18px;
  margin: 22px 0 0;
  padding: 0;
  color: rgba(255, 255, 255, 0.64);
  font-size: 13px;
  list-style: none;
}

.book-meta li {
  position: relative;
}

.book-meta li + li::before {
  position: absolute;
  top: 50%;
  left: -10px;
  width: 1px;
  height: 12px;
  content: "";
  background: var(--book-coral);
  transform: translateY(-50%);
}

.book-cover {
  display: block;
  width: min(100%, 300px);
  height: auto;
  justify-self: end;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  box-shadow: 0 22px 42px rgba(0, 0, 0, 0.34);
}

/* Overview */

.book-overview {
  padding: 76px 0 82px;
  background: #fff;
}

.overview-heading {
  display: grid;
  grid-template-columns: minmax(250px, 0.72fr) minmax(0, 1.28fr);
  gap: 44px 76px;
  align-items: start;
}

.section-eyebrow {
  margin: 0 0 9px;
  color: var(--book-teal);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.3;
  text-transform: uppercase;
}

.book-overview h2,
.book-resources h2,
.book-endorsements h2 {
  margin: 0;
  color: var(--book-ink);
  font-family: var(--book-serif);
  font-size: 38px;
  font-weight: 700;
  line-height: 1.15;
}

.overview-copy {
  max-width: 710px;
}

.overview-copy p {
  margin: 0 0 17px;
  color: var(--book-muted);
  font-size: 16px;
  line-height: 1.75;
}

.overview-copy p:last-child {
  margin-bottom: 0;
}

.book-features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 30px;
  margin-top: 58px;
}

.book-feature {
  padding-top: 20px;
  border-top: 2px solid var(--book-ink);
}

.book-feature:nth-child(2) {
  border-top-color: var(--book-coral);
}

.book-feature:nth-child(3) {
  border-top-color: var(--book-teal);
}

.feature-number {
  display: block;
  margin-bottom: 10px;
  color: #a74636;
  font-size: 12px;
  font-weight: 800;
}

.book-feature h3 {
  margin: 0;
  color: var(--book-ink);
  font-family: var(--book-serif);
  font-size: 22px;
  line-height: 1.3;
}

.book-feature p {
  margin: 10px 0 0;
  color: var(--book-muted);
  font-size: 14px;
  line-height: 1.65;
}

/* Companion resources */

.book-resources {
  padding: 72px 0 76px;
  background: var(--book-soft);
  border-top: 1px solid var(--book-line);
  border-bottom: 1px solid var(--book-line);
}

.resources-heading {
  display: grid;
  grid-template-columns: minmax(240px, 0.72fr) minmax(0, 1.28fr);
  gap: 36px 76px;
  align-items: end;
}

.resources-heading > p {
  max-width: 650px;
  margin: 0;
  color: var(--book-muted);
  font-size: 16px;
  line-height: 1.7;
}

.resource-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 44px;
}

.resource-item {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 16px;
  padding-top: 22px;
  border-top: 2px solid var(--book-ink);
}

.resource-item:nth-child(2) {
  border-top-color: var(--book-coral);
}

.resource-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  color: #fff;
  background: var(--book-teal-dark);
  border-radius: 4px;
}

.resource-item:nth-child(2) .resource-icon {
  color: var(--book-navy);
  background: var(--book-gold);
}

.resource-item h3 {
  margin: 0;
  color: var(--book-ink);
  font-family: var(--book-serif);
  font-size: 22px;
  line-height: 1.3;
}

.resource-item p {
  margin: 8px 0 12px;
  color: var(--book-muted);
  font-size: 14px;
  line-height: 1.65;
}

.resource-item a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--book-teal-dark);
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
}

.resource-item a:hover {
  color: var(--book-teal);
}

/* Endorsements */

.book-endorsements {
  padding: 80px 0 88px;
  background: #fff;
}

.endorsements-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 36px;
  margin-bottom: 42px;
}

.endorsements-heading > p {
  max-width: 400px;
  margin: 0;
  color: var(--book-muted);
  font-size: 14px;
}


.endorsement-cite {
  display: flex;
  flex-wrap: wrap;
  gap: 5px 10px;
  margin-top: 18px;
  color: var(--book-muted);
  font-family: var(--book-sans);
  font-size: 13px;
  font-style: normal;
}

.endorsement-cite strong {
  color: var(--book-teal-dark);
}

.endorsement-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 30px;
  margin-top: 0;
}

.endorsement {
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid var(--book-line);
}

.endorsement p {
  margin: 0;
  color: var(--book-text);
  font-family: var(--book-serif);
  font-size: 17px;
  line-height: 1.65;
}

@media (max-width: 1040px) {
  .book-hero-inner {
    grid-template-columns: minmax(0, 1fr) 270px;
    gap: 46px;
  }

  .book-hero h1 {
    font-size: 48px;
  }
}

@media (max-width: 920px) {
  .book-hero-inner {
    grid-template-columns: minmax(0, 1fr) 230px;
    gap: 36px;
  }

  .book-hero h1 {
    font-size: 43px;
  }

  .book-subtitle {
    font-size: 20px;
  }

  .overview-heading,
  .resources-heading {
    grid-template-columns: 1fr;
    gap: 22px;
  }

  .book-features {
    grid-template-columns: 1fr;
    gap: 26px;
  }

  .endorsement-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  body.book-page {
    font-size: 15px;
  }

  .book-hero {
    min-height: 0;
  }

  .book-hero-inner {
    grid-template-columns: 1fr;
    min-height: 0;
    gap: 20px;
    padding-top: 26px;
    padding-bottom: 32px;
  }

  .book-cover {
    width: 140px;
    justify-self: center;
    order: -1;
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.3);
  }

  .book-hero h1 {
    font-size: 38px;
  }

  .book-lead {
    font-size: 16px;
  }

  .book-meta {
    margin-top: 18px;
  }

  .book-overview,
  .book-resources,
  .book-endorsements {
    padding-top: 58px;
    padding-bottom: 64px;
  }

  .book-overview h2,
  .book-resources h2,
  .book-endorsements h2 {
    font-size: 32px;
  }

  .resource-list {
    grid-template-columns: 1fr;
  }

  .endorsements-heading {
    display: grid;
    gap: 14px;
  }


}

@media (max-width: 520px) {
  .book-hero h1 {
    font-size: 32px;
    line-height: 1.02;
  }

  .book-subtitle {
    margin-top: 12px;
    font-size: 17px;
    line-height: 1.3;
  }

  .book-cover {
    width: 110px;
  }

  .book-hero-inner {
    gap: 16px;
    padding-top: 20px;
    padding-bottom: 28px;
  }

  .book-kicker {
    margin-bottom: 9px;
  }

  .book-author {
    margin-top: 12px;
  }

  .book-lead {
    margin-top: 16px;
    font-size: 15px;
    line-height: 1.55;
  }

  .book-actions {
    flex-wrap: nowrap;
    margin-top: 20px;
  }

  .book-button {
    min-width: 0;
    padding: 9px 11px;
    font-size: 13px;
  }

  .book-meta {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 3px 12px;
    margin-top: 14px;
  }

  .book-meta li + li::before {
    display: none;
  }

  .book-meta li:last-child {
    grid-column: 1 / -1;
  }

  .resource-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 13px;
  }

  .resource-icon {
    width: 34px;
    height: 34px;
  }
}

@media print {
  .book-actions {
    display: none;
  }

  .book-hero {
    min-height: 0;
    color: #000;
    background: #fff;
    border: 0;
  }

  .book-hero-inner {
    grid-template-columns: 1fr 180px;
    min-height: 0;
    padding: 0 0 30px;
  }

  .book-hero h1,
  .book-kicker,
  .book-subtitle,
  .book-author,
  .book-lead,
  .book-meta {
    color: #000;
  }

  .book-overview,
  .book-resources,
  .book-endorsements {
    padding: 28px 0;
    background: #fff;
  }

  .resource-item,
  .book-feature,
  blockquote {
    break-inside: avoid;
  }
}