:root {
  --paper: #f8f4ec;
  --ink: #171717;
  --soft: #7b756c;
  --rule: #d8d0c3;
  --accent: #b94831;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
}

.masthead {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(18px, 5vw, 76px);
  border-bottom: 2px solid var(--ink);
}

.masthead h1 {
  margin: 6px 0 0;
  font-size: clamp(20px, 3vw, 32px);
  text-transform: uppercase;
  letter-spacing: -0.04em;
}

.masthead a {
  align-self: end;
  font-weight: 700;
}

.kicker,
.section-number,
.edition {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: 170px 1fr 280px;
  gap: 34px;
  padding: clamp(46px, 8vw, 96px) clamp(18px, 5vw, 76px);
  border-bottom: 1px solid var(--rule);
}

.hero-copy h2,
.chapter h2,
.contact h2 {
  margin: 0 0 22px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(40px, 7vw, 92px);
  font-weight: 400;
  line-height: 0.96;
  letter-spacing: -0.07em;
}

.hero-copy p:last-child,
.capability-list p,
.process p,
#tab-copy,
.note-grid p,
.scenario-list p,
.contact p,
.contact-details span {
  color: var(--soft);
  line-height: 1.8;
}

.hero-copy p:last-child {
  max-width: 790px;
  font-size: 20px;
}

.quote {
  align-self: end;
  border-left: 2px solid var(--accent);
  padding-left: 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 25px;
}

.chapter {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 34px;
  padding: clamp(54px, 8vw, 100px) clamp(18px, 5vw, 76px);
  border-bottom: 1px solid var(--rule);
}

.chapter-title span {
  display: block;
  margin-bottom: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.capability-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--ink);
  border: 1px solid var(--ink);
}

.capability-list article {
  min-height: 250px;
  padding: 28px;
  background: var(--paper);
}

.capability-list h3 {
  margin: 0 0 60px;
  font-size: 26px;
  letter-spacing: -0.04em;
}

.two-column {
  grid-template-columns: 0.9fr 1.1fr;
}

.audience {
  display: grid;
  grid-template-columns: 220px 1fr;
  border: 1px solid var(--ink);
}

.tab {
  min-height: 74px;
  border: 0;
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-weight: 800;
  text-align: left;
  padding: 18px;
}

.tab.active {
  background: var(--ink);
  color: var(--paper);
}

.tab-panel {
  grid-row: 1 / span 4;
  grid-column: 2;
  padding: 32px;
  background: #fffaf0;
}

.tab-panel h3 {
  margin-top: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 42px;
  font-weight: 400;
}

.process {
  display: block;
}

.process .section-number {
  margin-bottom: 16px;
}

.process ol {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  padding: 0;
  margin: 42px 0 0;
  list-style: none;
  counter-reset: item;
  border: 1px solid var(--ink);
}

.process li {
  min-height: 280px;
  padding: 24px;
  border-right: 1px solid var(--ink);
  counter-increment: item;
}

.process li:last-child {
  border-right: 0;
}

.process li::before {
  content: "0" counter(item);
  display: block;
  margin-bottom: 70px;
  color: var(--accent);
  font-weight: 900;
}

.process span {
  display: block;
  margin-bottom: 12px;
  font-size: 24px;
  font-weight: 900;
}

.evidence {
  grid-template-columns: 1fr 1fr;
  align-items: start;
  background: var(--ink);
  color: var(--paper);
}

.evidence ul {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.evidence li {
  padding: 18px 0;
  border-bottom: 1px solid rgba(248, 244, 236, 0.22);
  font-size: 22px;
}

.notes {
  background: #fffaf0;
}

.note-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: 30px;
  border: 1px solid var(--ink);
  background: var(--ink);
}

.note-grid article {
  min-height: 270px;
  padding: 24px;
  background: #fffaf0;
}

.note-grid span {
  display: block;
  margin-bottom: 70px;
  color: var(--accent);
  font-weight: 900;
  text-transform: uppercase;
}

.scenario {
  grid-template-columns: 0.9fr 1.1fr;
}

.scenario-list {
  display: grid;
  gap: 18px;
}

.scenario-list p {
  margin: 0;
  padding: 22px;
  border-left: 3px solid var(--accent);
  background: rgba(185, 72, 49, 0.06);
}

.contact {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 34px;
  padding: clamp(54px, 8vw, 100px) clamp(18px, 5vw, 76px);
}

.contact-details {
  display: grid;
  gap: 13px;
  align-self: end;
  padding: 28px;
  border: 2px solid var(--ink);
}

.contact-details a {
  color: var(--accent);
  font-size: 22px;
  font-weight: 900;
}

@media (max-width: 900px) {
  .masthead,
  .hero,
  .chapter,
  .two-column,
  .evidence,
  .scenario,
  .contact {
    grid-template-columns: 1fr;
  }

  .capability-list,
  .process ol,
  .note-grid {
    grid-template-columns: 1fr;
  }

  .process li,
  .process li:last-child {
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

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

  .tab {
    border-right: 0;
  }

  .tab-panel {
    grid-column: 1;
    grid-row: auto;
  }
}