:root {
  --ink: #11110f;
  --muted: #5e5b53;
  --paper: #f4f1e8;
  --soft: #fbfaf5;
  --card: #e7ded0;
  --line: #cec4b5;
  --white: #fff;
  --accent: #5f9f78;
  --accent-light: #cfe5d4;
  --accent-dark: #205a3b;
  --accent-gold: #d8a85b;
  --content: 1180px;
  --shadow: 0 20px 60px rgb(17 17 15 / 9%);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, "Avenir Next", Avenir, "Helvetica Neue", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-underline-offset: 4px;
}

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

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

.site-header,
.site-footer {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 0 max(24px, calc((100vw - var(--content)) / 2));
  border-bottom: 1px solid rgb(17 17 15 / 10%);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
}

.brand strong {
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -.04em;
}

.brand span {
  color: var(--muted);
  font-size: .8rem;
  font-weight: 800;
  letter-spacing: .11em;
  text-transform: uppercase;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 34px);
}

nav a {
  font-size: .88rem;
  font-weight: 800;
}

.header-cta {
  padding: 9px 13px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  text-decoration: none;
}

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

.hero-inner {
  display: grid;
  width: min(calc(100% - 48px), var(--content));
  min-height: min(760px, calc(100vh - 76px));
  margin-inline: auto;
  grid-template-columns: minmax(0, 1.15fr) minmax(310px, .65fr);
  align-items: end;
  gap: clamp(44px, 7vw, 96px);
  padding: clamp(68px, 9vw, 116px) 0;
}

.hero-copy {
  align-self: center;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: .76rem;
  font-weight: 900;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: var(--accent-light);
}

h1 {
  max-width: 760px;
  margin-bottom: 32px;
  font-size: clamp(4.2rem, 9.5vw, 8.8rem);
  font-weight: 900;
  letter-spacing: -.08em;
  line-height: .84;
}

.hero-lead {
  max-width: 700px;
  margin-bottom: 0;
  color: #d9d1c5;
  font: clamp(1.2rem, 2.2vw, 1.65rem)/1.5 Georgia, "Times New Roman", serif;
}

.portrait-wrap {
  align-self: end;
}

.portrait {
  width: 100%;
  aspect-ratio: 4 / 5;
  border: 1px solid rgb(255 255 255 / 18%);
  border-radius: 26px;
  object-fit: cover;
  filter: saturate(.9);
}

.portrait-note {
  margin: 14px 0 0;
  color: var(--accent-light);
  font-size: .78rem;
  font-weight: 800;
}

.jum-author-page .hero-inner {
  grid-template-columns: minmax(0, .95fr) minmax(380px, .85fr);
  gap: clamp(38px, 5vw, 72px);
}

.jum-author-page .hero-copy {
  max-width: 610px;
}

.jum-author-page .portrait {
  aspect-ratio: 3 / 4;
  object-position: center;
}

.profile-section,
.expertise,
.related,
.authors-intro,
.author-grid {
  width: min(calc(100% - 48px), var(--content));
  margin-inline: auto;
}

.profile-section {
  display: grid;
  grid-template-columns: .7fr 1.3fr;
  gap: clamp(40px, 8vw, 120px);
  padding: clamp(86px, 12vw, 156px) 0;
}

.section-title {
  max-width: 850px;
  margin-bottom: 30px;
  font-size: clamp(3rem, 7vw, 6.8rem);
  font-weight: 900;
  letter-spacing: -.07em;
  line-height: .89;
}

.profile-copy {
  max-width: 720px;
}

.profile-copy p {
  color: var(--muted);
  font: clamp(1.1rem, 2vw, 1.42rem)/1.58 Georgia, "Times New Roman", serif;
}

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

.expertise {
  padding-bottom: clamp(90px, 12vw, 150px);
}

.expertise-heading {
  max-width: 780px;
  margin-bottom: 46px;
  font-size: clamp(2.8rem, 6vw, 5.8rem);
  font-weight: 900;
  letter-spacing: -.065em;
  line-height: .92;
}

.expertise-grid,
.author-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.expertise-card,
.author-card {
  min-height: 330px;
  padding: clamp(28px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--soft);
  box-shadow: var(--shadow);
}

.card-number {
  display: block;
  margin-bottom: 70px;
  color: var(--muted);
  font-size: .78rem;
  font-weight: 900;
  letter-spacing: .12em;
}

.expertise-card h3,
.author-card h2 {
  margin-bottom: 16px;
  font-size: clamp(1.55rem, 3vw, 2.3rem);
  font-weight: 900;
  letter-spacing: -.045em;
  line-height: 1;
}

.expertise-card p,
.author-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.timeline {
  background: var(--card);
}

.timeline-inner {
  display: grid;
  width: min(calc(100% - 48px), var(--content));
  margin-inline: auto;
  grid-template-columns: .8fr 1.2fr;
  gap: clamp(40px, 8vw, 110px);
  padding: clamp(86px, 12vw, 150px) 0;
}

.timeline h2,
.related h2,
.authors-intro h1 {
  margin-bottom: 24px;
  font-size: clamp(3rem, 7vw, 6.6rem);
  font-weight: 900;
  letter-spacing: -.07em;
  line-height: .89;
}

.facts {
  margin: 0;
  padding: 0;
  list-style: none;
}

.facts li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 22px;
  padding: 25px 0;
  border-top: 1px solid rgb(17 17 15 / 20%);
}

.facts li:last-child {
  border-bottom: 1px solid rgb(17 17 15 / 20%);
}

.facts strong {
  font-size: .78rem;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.facts span {
  font: 1.1rem/1.5 Georgia, "Times New Roman", serif;
}

.related {
  padding: clamp(90px, 12vw, 150px) 0;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.related-card {
  display: flex;
  min-height: 300px;
  flex-direction: column;
  justify-content: space-between;
  padding: clamp(28px, 4vw, 44px);
  border-radius: 22px;
  background: var(--ink);
  color: var(--white);
  text-decoration: none;
}

.related-card-light {
  border: 1px solid var(--line);
  background: var(--soft);
  color: var(--ink);
}

.related-card small {
  color: var(--accent-light);
  font-size: .75rem;
  font-weight: 900;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.related-card-light small {
  color: var(--muted);
}

.related-card strong {
  max-width: 500px;
  font-size: clamp(2rem, 4vw, 3.8rem);
  letter-spacing: -.055em;
  line-height: .95;
}

.related-card span {
  font-size: .88rem;
  font-weight: 900;
}

.site-footer {
  min-height: 100px;
  border-top: 1px solid rgb(17 17 15 / 10%);
  border-bottom: 0;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
  font-size: .82rem;
}

.authors-intro {
  padding: clamp(90px, 12vw, 150px) 0 70px;
}

.authors-intro h1 {
  max-width: 900px;
}

.authors-intro > p:last-child {
  max-width: 760px;
  color: var(--muted);
  font: clamp(1.15rem, 2.2vw, 1.5rem)/1.52 Georgia, "Times New Roman", serif;
}

.author-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding-bottom: clamp(90px, 12vw, 150px);
}

.author-card {
  display: flex;
  min-height: 680px;
  flex-direction: column;
}

.author-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  margin-bottom: 32px;
  border-radius: 14px;
  object-fit: cover;
  object-position: center 25%;
}

.author-card p {
  margin-bottom: 28px;
}

.author-card a {
  margin-top: auto;
  font-size: .9rem;
  font-weight: 900;
}

@media (max-width: 860px) {
  .hero-inner,
  .profile-section,
  .timeline-inner {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    padding-top: 80px;
  }

  .portrait-wrap {
    width: min(100%, 560px);
  }

  .jum-author-page .hero-copy {
    max-width: 700px;
  }

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

  .expertise-card {
    min-height: 250px;
  }

  .card-number {
    margin-bottom: 46px;
  }
}

@media (max-width: 680px) {
  body {
    font-size: 16px;
  }

  .site-header {
    min-height: 68px;
  }

  nav a:not(.header-cta) {
    display: none;
  }

  .brand span {
    display: none;
  }

  h1 {
    font-size: clamp(3.4rem, 18vw, 5.2rem);
  }

  .related-grid,
  .author-grid {
    grid-template-columns: 1fr;
  }

  .author-card {
    min-height: 580px;
  }

  .facts li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: 24px;
  }
}

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