:root {
  --ink: #202423;
  --muted: #5f6661;
  --paper: #f7f6f1;
  --paper-deep: #ebe9e0;
  --white: #ffffff;
  --line: #cfcfc6;
  --red: #a6423f;
  --red-dark: #80302e;
  --content-width: 1240px;
  --header-height: 76px;
  --shadow: 0 20px 48px rgba(18, 24, 20, 0.13);
  font-family: Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 18px);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-size: 18px;
  line-height: 1.62;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

p,
h1,
h2,
h3,
dl,
figure {
  margin-top: 0;
}

.content-width {
  width: min(var(--content-width), calc(100% - 64px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  min-height: var(--header-height);
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 12px max(32px, calc((100vw - var(--content-width)) / 2));
  border-bottom: 1px solid rgba(32, 36, 35, 0.13);
  background: rgba(247, 246, 241, 0.97);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 2px solid var(--red);
  color: var(--red);
  font-size: 0.78rem;
  font-weight: 700;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(20px, 2.6vw, 38px);
  color: #39403b;
  font-size: 0.98rem;
  font-weight: 600;
}

.main-nav a {
  padding: 10px 0;
}

.main-nav a:hover {
  color: var(--red-dark);
}

.language-switch {
  display: inline-grid;
  grid-template-columns: repeat(2, 38px);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
}

.main-nav .language-switch a {
  display: grid;
  min-height: 38px;
  padding: 0;
  place-items: center;
  font-size: 0.78rem;
  font-weight: 700;
}

.main-nav .language-switch a + a {
  border-left: 1px solid var(--line);
}

.main-nav .language-switch a[aria-current="page"] {
  color: var(--white);
  background: var(--red);
}

.main-nav .language-switch a:hover {
  color: var(--white);
  background: var(--red-dark);
}

.menu-button {
  display: none;
  width: 50px;
  height: 50px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
}

.menu-button span {
  display: block;
  width: 21px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
}

.hero,
.visual-section {
  position: relative;
  display: grid;
  min-height: max(690px, calc(100svh - var(--header-height)));
  overflow: hidden;
  color: var(--white);
  isolation: isolate;
}

.hero-image,
.visual-image {
  position: absolute;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-image {
  object-position: center center;
}

.hero-shade,
.visual-shade {
  position: absolute;
  z-index: -1;
  inset: 0;
}

.hero-shade {
  background: linear-gradient(90deg, rgba(18, 24, 20, 0.84) 0%, rgba(18, 24, 20, 0.61) 43%, rgba(18, 24, 20, 0.17) 76%, rgba(18, 24, 20, 0.07) 100%);
}

.hero-content {
  align-self: center;
  padding: 86px 0 118px;
}

.eyebrow {
  margin-bottom: 16px;
  color: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.eyebrow-red {
  color: var(--red);
}

h1,
h2,
h3 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
}

h1 {
  max-width: 10ch;
  margin-bottom: 28px;
  font-size: 7.4rem;
  line-height: 0.9;
}

h2 {
  max-width: 15ch;
  margin-bottom: 24px;
  font-size: 4.8rem;
  line-height: 0.99;
}

h3 {
  margin-bottom: 12px;
  font-size: 1.55rem;
  line-height: 1.14;
}

.hero-intro {
  max-width: 660px;
  margin-bottom: 34px;
  font-size: 1.28rem;
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 25px;
}

.button {
  display: inline-flex;
  min-height: 56px;
  align-items: center;
  justify-content: center;
  padding: 0 25px;
  border: 1px solid transparent;
  font-size: 1rem;
  font-weight: 700;
}

.button-light {
  color: var(--ink);
  background: var(--white);
}

.button-light:hover {
  color: var(--white);
  background: var(--red-dark);
}

.text-link {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  min-height: 52px;
  border-bottom: 1px solid currentColor;
  font-weight: 700;
}

.text-link:hover {
  color: #f9d9d6;
}

.text-link-dark {
  color: var(--ink);
}

.text-link-dark:hover {
  color: var(--red-dark);
}

.scroll-cue {
  position: absolute;
  right: max(32px, calc((100vw - var(--content-width)) / 2));
  bottom: 34px;
  display: inline-flex;
  gap: 12px;
  align-items: center;
  font-size: 0.98rem;
  font-weight: 700;
}

.visual-section {
  min-height: 760px;
}

.visual-section-city .visual-image {
  object-position: center center;
}

.visual-section-river .visual-image {
  object-position: center center;
}

.visual-shade-dark {
  background: linear-gradient(90deg, rgba(15, 19, 16, 0.86) 0%, rgba(15, 19, 16, 0.62) 45%, rgba(15, 19, 16, 0.22) 83%, rgba(15, 19, 16, 0.12) 100%);
}

.visual-shade-light {
  background: linear-gradient(90deg, rgba(247, 246, 241, 0.94) 0%, rgba(247, 246, 241, 0.82) 38%, rgba(247, 246, 241, 0.18) 78%, rgba(247, 246, 241, 0.04) 100%);
}

.visual-copy {
  align-self: center;
  padding: 100px 0;
}

.visual-copy > p:not(.eyebrow) {
  max-width: 670px;
  margin-bottom: 20px;
  font-size: 1.2rem;
}

.visual-copy-dark {
  color: var(--ink);
}

.book-method {
  padding: 122px 0;
  background: var(--paper);
}

.method-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.87fr) minmax(440px, 1.13fr);
  gap: clamp(52px, 8vw, 126px);
  align-items: center;
}

.method-copy > p:not(.eyebrow) {
  max-width: 590px;
  color: var(--muted);
  font-size: 1.14rem;
}

.method-list {
  margin: 36px 0 0;
  border-top: 1px solid var(--line);
}

.method-list div {
  display: grid;
  grid-template-columns: minmax(178px, 0.7fr) minmax(0, 1.3fr);
  gap: 26px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.method-list dt {
  font-size: 1rem;
  font-weight: 700;
}

.method-list dd {
  margin: 0;
  color: var(--muted);
}

.sample-page {
  margin: 0;
  background: var(--white);
  box-shadow: var(--shadow);
}

.sample-page img {
  width: 100%;
}

.sample-page figcaption {
  padding: 18px 22px;
  color: var(--muted);
  font-size: 0.95rem;
}

.method-legend-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.method-legend-preview li {
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.method-legend-preview img {
  width: 26px;
  height: 26px;
  mix-blend-mode: multiply;
}

.method-detail-link {
  margin-top: 22px;
}

.books-section,
.insights-section {
  padding: 120px 0;
}

.books-section {
  background: var(--white);
}

.insights-section {
  background: var(--paper-deep);
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 56px;
  align-items: end;
  margin-bottom: 54px;
}

.section-heading h2 {
  margin-bottom: 0;
}

.section-note {
  max-width: 350px;
  margin: 0 0 6px;
  color: var(--muted);
}

.book-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}

.book-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--paper);
}

.book-detail-link {
  display: flex;
  flex: 1;
  flex-direction: column;
}

.book-detail-link:hover h3 {
  color: var(--red-dark);
}

.book-detail-link img {
  width: 100%;
  aspect-ratio: 1 / 1.12;
  object-fit: cover;
  object-position: top center;
  border-bottom: 1px solid var(--line);
}

.book-card-content {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 23px 22px 25px;
}

.book-card-content p {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.book-card-content p:last-child {
  margin-top: auto;
  margin-bottom: 0;
  padding-top: 15px;
  border-top: 1px solid var(--line);
}

.book-card-content .book-type {
  margin-bottom: 9px;
  color: var(--red);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.book-card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.book-card-actions a {
  display: flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  padding: 10px;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 700;
  text-align: center;
}

.book-card-actions a + a {
  border-left: 1px solid var(--line);
}

.book-card-actions a:hover {
  color: var(--red-dark);
}

.book-card-actions .amazon-link {
  color: var(--white);
  background: var(--red);
}

.book-card-actions .amazon-link:hover {
  color: var(--white);
  background: var(--red-dark);
}

.insight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 26px;
}

.insight-grid figure {
  margin: 0;
  background: var(--white);
  box-shadow: 0 14px 32px rgba(32, 36, 35, 0.1);
}

.insight-grid img {
  width: 100%;
  height: auto;
}

.insight-grid figcaption {
  padding: 18px 20px 20px;
  color: var(--muted);
  font-size: 0.96rem;
}

.author-section {
  padding: 104px 0 112px;
  color: var(--white);
  background: #28312d;
}

.author-layout {
  display: grid;
  grid-template-columns: minmax(140px, 0.3fr) minmax(0, 1fr) minmax(200px, 280px);
  gap: clamp(36px, 5vw, 88px);
  align-items: start;
}

.author-layout .eyebrow {
  padding-top: 12px;
  border-top: 2px solid #cdd5c5;
}

.author-layout h2 {
  margin-bottom: 20px;
}

.author-copy p {
  max-width: 750px;
  margin-bottom: 0;
  color: #e6e8e1;
  font-size: 1.2rem;
}

.author-copy p + p {
  margin-top: 18px;
}

.author-portrait {
  margin: 0;
}

.author-portrait img {
  display: block;
  width: 100%;
  border: 1px solid rgba(230, 232, 225, 0.45);
}

.detail-hero {
  position: relative;
  display: grid;
  min-height: 610px;
  overflow: hidden;
  color: var(--white);
  background-color: #29332f;
  background-position: center;
  background-size: cover;
  isolation: isolate;
}

.detail-hero::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(90deg, rgba(15, 20, 17, 0.9) 0%, rgba(15, 20, 17, 0.7) 49%, rgba(15, 20, 17, 0.3) 100%);
  content: "";
}

.detail-freiburg .detail-hero {
  background-image: url("07_Assets/web/sample-freiburg-032.jpg");
}

.detail-breisgau .detail-hero {
  background-image: url("07_Assets/web/background-kaiserstuhl.jpg");
}

.detail-markgraeflerland .detail-hero {
  background-image: url("07_Assets/web/hero-markgraeflerland.jpg");
}

.detail-hochrhein .detail-hero {
  background-image: url("07_Assets/web/background-hochrhein.jpg");
}

.detail-hero-content {
  align-self: center;
  padding: 72px 0 82px;
}

.back-link {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  margin-bottom: 52px;
  border-bottom: 1px solid currentColor;
  font-size: 0.98rem;
  font-weight: 700;
}

.back-link:hover {
  color: #f9d9d6;
}

.detail-hero h1 {
  max-width: 15ch;
  margin-bottom: 24px;
  font-size: 4.7rem;
  line-height: 0.98;
}

.detail-intro {
  max-width: 620px;
  margin-bottom: 30px;
  font-size: 1.22rem;
}

.detail-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0 0 26px;
}

.detail-facts div {
  min-width: 120px;
  padding: 0 22px;
  border-left: 1px solid rgba(255, 255, 255, 0.5);
}

.detail-facts div:first-child {
  padding-left: 0;
  border-left: 0;
}

.detail-facts dt {
  font-size: 1.22rem;
  font-weight: 700;
}

.detail-facts dd {
  margin: 0;
  color: #e6e8e1;
  font-size: 0.92rem;
}

.detail-origin {
  max-width: 700px;
  margin-bottom: 30px;
  font-size: 1rem;
  font-weight: 700;
}

.detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
}

.button-amazon {
  color: var(--white);
  background: var(--red);
}

.button-amazon:hover {
  background: var(--red-dark);
}

.button-outline-light {
  border-color: rgba(255, 255, 255, 0.65);
  color: var(--white);
}

.button-outline-light:hover {
  color: var(--ink);
  background: var(--white);
}

.detail-gallery {
  padding: 104px 0 122px;
  background: var(--paper);
}

.detail-gallery-heading {
  display: flex;
  justify-content: space-between;
  gap: 50px;
  align-items: end;
  margin-bottom: 52px;
}

.detail-gallery-heading h2 {
  margin-bottom: 0;
}

.detail-gallery-heading > p:not(.eyebrow) {
  max-width: 390px;
  margin: 0;
  color: var(--muted);
}

.spread-gallery {
  display: grid;
  gap: 50px;
}

.spread {
  margin: 0;
  padding: 16px;
  background: var(--white);
  box-shadow: 0 16px 34px rgba(32, 36, 35, 0.1);
}

.spread > img {
  width: 100%;
  height: auto;
}

.spread-pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--line);
}

.spread-pair img {
  width: 100%;
  height: auto;
}

.spread figcaption {
  padding: 15px 4px 2px;
  color: var(--muted);
  font-size: 0.95rem;
}

.detail-craft {
  padding: 92px 0;
  color: var(--white);
  background: #28312d;
}

.detail-craft-layout {
  display: grid;
  grid-template-columns: minmax(160px, 0.38fr) minmax(0, 1fr);
  gap: clamp(42px, 8vw, 136px);
}

.detail-craft .eyebrow {
  padding-top: 12px;
  border-top: 2px solid #cdd5c5;
}

.detail-craft h2 {
  margin-bottom: 20px;
}

.detail-craft p:not(.eyebrow) {
  max-width: 760px;
  margin-bottom: 0;
  color: #e6e8e1;
  font-size: 1.16rem;
}

.structure-hero {
  padding: 104px 0 108px;
  color: var(--white);
  background: #28312d;
}

.structure-hero .back-link {
  margin-bottom: 44px;
}

.structure-hero h1 {
  max-width: 14ch;
  margin-bottom: 26px;
  font-size: 5.4rem;
}

.structure-hero p:not(.eyebrow) {
  max-width: 700px;
  margin-bottom: 0;
  color: #e6e8e1;
  font-size: 1.24rem;
}

.structure-overview,
.structure-entry,
.structure-legend {
  padding: 112px 0;
}

.structure-overview,
.structure-legend {
  background: var(--white);
}

.structure-chapters {
  padding: 112px 0;
  background: var(--paper-deep);
}

.structure-entry {
  background: var(--paper);
}

.structure-section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 56px;
  margin-bottom: 52px;
}

.structure-section-heading h2 {
  margin-bottom: 0;
}

.structure-section-heading > p {
  max-width: 430px;
  margin: 0;
  color: var(--muted);
}

.structure-map-frame {
  margin: 0;
  padding: 12px;
  background: var(--white);
  box-shadow: 0 16px 34px rgba(32, 36, 35, 0.1);
}

.structure-map-frame img {
  width: 100%;
  height: auto;
}

.structure-map-frame figcaption {
  padding: 15px 8px 4px;
  color: var(--muted);
  font-size: 0.95rem;
}

.structure-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin: 44px 0 0;
  padding: 0;
  list-style: none;
}

.structure-steps li {
  display: grid;
  grid-template-columns: 50px minmax(0, 1fr);
  gap: 16px;
  padding-top: 19px;
  border-top: 2px solid var(--red);
}

.structure-steps span {
  color: var(--red);
  font-size: 0.92rem;
  font-weight: 700;
}

.structure-steps strong {
  display: block;
  margin-bottom: 4px;
}

.structure-steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.structure-split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(440px, 1.2fr);
  gap: clamp(52px, 8vw, 126px);
  align-items: center;
}

.structure-split > div > p:not(.eyebrow) {
  max-width: 570px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.15rem;
}

.structure-entry-list {
  margin: 36px 0 0;
  border-top: 1px solid var(--line);
}

.structure-entry-list div {
  display: grid;
  grid-template-columns: minmax(110px, 0.45fr) minmax(0, 1.55fr);
  gap: 20px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.structure-entry-list dt {
  font-size: 1.05rem;
  font-weight: 700;
}

.structure-entry-list dd {
  margin: 0;
  color: var(--muted);
}

.legend-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.legend-grid li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  min-height: 132px;
  padding: 24px 22px 24px 0;
  border-bottom: 1px solid var(--line);
}

.legend-grid li:not(:nth-child(3n + 1)) {
  padding-left: 22px;
  border-left: 1px solid var(--line);
}

.legend-grid img {
  width: 34px;
  height: 34px;
}

.legend-grid h3 {
  margin-bottom: 6px;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.25;
}

.legend-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.48;
}

.site-footer {
  padding: 26px 0;
  color: #e6e8e1;
  background: #1b211e;
}

.footer-layout {
  display: flex;
  justify-content: space-between;
  gap: 28px;
}

.footer-layout p {
  margin: 0;
  font-size: 0.9rem;
}

:focus-visible {
  outline: 3px solid #ffc34d;
  outline-offset: 4px;
}

@media (max-width: 1080px) {
  .main-nav {
    gap: 20px;
    font-size: 0.92rem;
  }

  .book-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .method-layout {
    grid-template-columns: 1fr;
  }

  .sample-page {
    max-width: 760px;
  }

  .structure-split {
    grid-template-columns: 1fr;
  }

  .structure-split .structure-map-frame,
  .structure-entry .sample-page {
    max-width: 760px;
  }
}

@media (max-width: 800px) {
  :root {
    --header-height: 70px;
  }

  body {
    font-size: 17px;
  }

  .content-width {
    width: min(100% - 40px, var(--content-width));
  }

  .site-header {
    min-height: var(--header-height);
    padding: 9px 20px;
  }

  .brand {
    gap: 10px;
    font-size: 0.84rem;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .menu-button {
    display: block;
  }

  .main-nav {
    display: none;
  }

  .main-nav.is-open {
    position: absolute;
    top: calc(100% + 8px);
    right: 14px;
    left: 14px;
    display: grid;
    gap: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .main-nav.is-open a {
    padding: 16px 19px;
    border-bottom: 1px solid var(--line);
  }

  .main-nav.is-open a:last-child {
    border-bottom: 0;
  }

  .main-nav.is-open .language-switch {
    width: 78px;
    margin: 14px 19px 18px;
  }

  .main-nav.is-open .language-switch a {
    min-height: 38px;
    padding: 0;
    border-bottom: 0;
  }

  .hero,
  .visual-section {
    min-height: max(650px, calc(100svh - var(--header-height)));
  }

  .hero-image {
    object-position: 64% center;
  }

  .hero-shade {
    background: linear-gradient(90deg, rgba(18, 24, 20, 0.83) 0%, rgba(18, 24, 20, 0.66) 62%, rgba(18, 24, 20, 0.38) 100%);
  }

  .hero-content,
  .visual-copy {
    padding: 76px 0 94px;
  }

  h1 {
    max-width: none;
    font-size: 2rem;
  }

  h2 {
    font-size: 2.45rem;
  }

  .hero-intro,
  .visual-copy > p:not(.eyebrow),
  .author-copy p {
    font-size: 1.08rem;
  }

  .scroll-cue {
    right: 20px;
    bottom: 24px;
  }

  .visual-section {
    min-height: 640px;
  }

  .visual-section-city .visual-image {
    object-position: 56% center;
  }

  .visual-section-river .visual-image {
    object-position: 68% center;
  }

  .visual-shade-light {
    background: linear-gradient(90deg, rgba(247, 246, 241, 0.96) 0%, rgba(247, 246, 241, 0.84) 63%, rgba(247, 246, 241, 0.28) 100%);
  }

  .book-method,
  .books-section,
  .insights-section {
    padding: 82px 0;
  }

  .structure-overview,
  .structure-chapters,
  .structure-entry,
  .structure-legend {
    padding: 82px 0;
  }

  .structure-hero {
    padding: 76px 0 82px;
  }

  .structure-hero .back-link {
    margin-bottom: 34px;
  }

  .structure-hero h1 {
    font-size: 3.1rem;
  }

  .structure-hero p:not(.eyebrow),
  .structure-split > div > p:not(.eyebrow) {
    font-size: 1.08rem;
  }

  .method-list div {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .section-heading,
  .author-layout,
  .structure-section-heading {
    display: block;
  }

  .author-portrait {
    width: min(280px, 100%);
    margin-top: 32px;
  }

  .section-note {
    max-width: 520px;
    margin-top: 22px;
  }

  .structure-section-heading > p {
    max-width: 520px;
    margin-top: 22px;
  }

  .structure-steps,
  .legend-grid {
    grid-template-columns: 1fr;
  }

  .structure-steps {
    gap: 18px;
  }

  .legend-grid li,
  .legend-grid li:not(:nth-child(3n + 1)) {
    min-height: 0;
    padding: 21px 0;
    border-left: 0;
  }

  .structure-entry-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .book-grid,
  .insight-grid {
    grid-template-columns: 1fr;
  }

  .book-card {
    display: flex;
    flex-direction: column;
  }

  .book-detail-link {
    display: grid;
    grid-template-columns: minmax(145px, 0.85fr) minmax(0, 1.15fr);
  }

  .book-detail-link img {
    height: 100%;
    min-height: 246px;
    border-right: 1px solid var(--line);
    border-bottom: 0;
  }

  .book-card-content {
    min-height: 246px;
  }

  .detail-hero {
    min-height: 650px;
  }

  .detail-hero-content {
    padding: 48px 0 72px;
  }

  .back-link {
    margin-bottom: 42px;
  }

  .detail-hero h1 {
    max-width: none;
    font-size: 2.6rem;
  }

  .detail-intro {
    font-size: 1.1rem;
  }

  .detail-facts {
    gap: 14px 0;
  }

  .detail-facts div {
    min-width: 106px;
    padding: 0 15px;
  }

  .detail-gallery {
    padding: 82px 0;
  }

  .detail-gallery-heading,
  .detail-craft-layout {
    display: block;
  }

  .detail-gallery-heading > p:not(.eyebrow) {
    max-width: 520px;
    margin-top: 22px;
  }

  .spread-gallery {
    gap: 28px;
  }

  .spread {
    padding: 8px;
  }

  .spread figcaption {
    padding: 14px 6px 4px;
  }

  .detail-craft {
    padding: 78px 0 82px;
  }

  .detail-craft .eyebrow {
    width: 160px;
    margin-bottom: 32px;
  }

  .detail-craft p:not(.eyebrow) {
    font-size: 1.08rem;
  }

  .author-section {
    padding: 78px 0 82px;
  }

  .author-layout .eyebrow {
    width: 160px;
    margin-bottom: 32px;
  }

  .footer-layout {
    display: grid;
    gap: 6px;
  }
}

@media (max-width: 430px) {
  .brand-name {
    max-width: 180px;
    line-height: 1.08;
  }

  .hero-actions {
    gap: 18px;
    align-items: flex-start;
    flex-direction: column;
  }

  .book-card {
    display: flex;
  }

  .book-detail-link {
    grid-template-columns: 132px minmax(0, 1fr);
  }

  .book-detail-link img,
  .book-card-content {
    min-height: 232px;
  }

  .book-card-content {
    padding: 19px 17px;
  }

  h3 {
    font-size: 1.34rem;
  }
}