* {
  box-sizing: border-box;
}

:root {
  --blue: #1676a8;
  --blue-deep: #0d5f8c;
  --gold: #d8b35a;
  --cream: #f6f1e6;
  --ink: #12212a;
  --muted: #667078;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  background: var(--cream);
  color: var(--ink);
}

.topbar {
  height: 70px;
  padding: 0 6vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(18, 33, 42, 0.12);
  background: rgba(246, 241, 230, 0.96);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.brand {
  font: 700 13px/1 Arial, sans-serif;
  letter-spacing: 0.16em;
}

.nav {
  display: flex;
  gap: 22px;
}

.nav-link {
  color: var(--ink);
  text-decoration: none;
  font: 600 14px/1 Arial, sans-serif;
}

.hero {
  min-height: calc(100vh - 70px);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 7vw;
  align-items: center;
  padding: 7vw 8vw;
}

.eyebrow,
.section-number {
  font: 700 12px/1 Arial, sans-serif;
  letter-spacing: 0.18em;
  color: var(--gold);
}

h1 {
  margin: 16px 0 12px;
  font-size: clamp(64px, 8vw, 120px);
  line-height: 0.84;
  font-weight: 500;
  letter-spacing: -0.055em;
}

.tagline {
  font-size: clamp(24px, 3vw, 42px);
  margin: 0 0 30px;
  color: var(--blue-deep);
}

.intro {
  max-width: 760px;
  font-size: 18px;
  line-height: 1.8;
  color: #34424a;
  margin-bottom: 18px;
}

.opening-question {
  font-size: 21px;
  color: var(--ink);
}

.emphasis {
  font-weight: 700;
  color: var(--ink);
}

.final-line {
  font-size: 21px;
  color: var(--blue-deep);
  margin-top: 6px;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-block;
  padding: 15px 20px;
  text-decoration: none;
  font: 700 14px/1 Arial, sans-serif;
  border: 1px solid var(--ink);
}

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

.secondary {
  color: var(--ink);
  background: transparent;
}

.hero-visual,
.book-visual {
  display: flex;
  justify-content: center;
}

.book {
  width: min(390px, 70vw);
  aspect-ratio: 0.68;
  background: var(--blue);
  color: var(--gold);
  position: relative;
  box-shadow: 24px 28px 45px rgba(17, 31, 39, 0.24);
  border: 1px solid rgba(255,255,255,.15);
  padding: 46px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}

.cover-title {
  text-align: center;
  font-size: clamp(27px, 4vw, 42px);
  line-height: 0.95;
  letter-spacing: 0.05em;
}

.author {
  font: 700 12px/1 Arial, sans-serif;
  letter-spacing: 0.16em;
}

.key {
  width: 74%;
  transform: rotate(-25deg);
}

.corner {
  position: absolute;
  width: 55px;
  height: 55px;
  border-color: var(--gold);
}

.tl { top: 18px; left: 18px; border-top: 2px solid; border-left: 2px solid; }
.tr { top: 18px; right: 18px; border-top: 2px solid; border-right: 2px solid; }
.bl { bottom: 18px; left: 18px; border-bottom: 2px solid; border-left: 2px solid; }
.br { bottom: 18px; right: 18px; border-bottom: 2px solid; border-right: 2px solid; }

.statement,
.author-section {
  padding: 110px 8vw;
  border-top: 1px solid rgba(18, 33, 42, 0.12);
}

.statement {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 30px;
  background: white;
}

.statement h2,
.author-section h2 {
  font-size: clamp(40px, 5vw, 70px);
  line-height: 1;
  margin: 0 0 24px;
  font-weight: 500;
  letter-spacing: -0.04em;
}

.statement p:not(.section-number) {
  font-size: 22px;
  line-height: 1.6;
  max-width: 850px;
}

.section-heading {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 30px;
  margin-bottom: 54px;
}

.section-heading p:last-child {
  font-size: 18px;
  color: var(--muted);
}

.author-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 34px;
  align-items: center;
}

.author-image-wrap {
  background: white;
  padding: 14px;
  box-shadow: 0 16px 30px rgba(17, 31, 39, 0.10);
}

.author-image {
  width: 100%;
  display: block;
  object-fit: cover;
  aspect-ratio: 4 / 5;
}

.author-copy p {
  font-size: 21px;
  line-height: 1.7;
  margin-top: 0;
  margin-bottom: 18px;
  max-width: 860px;
}

.closing {
  background: var(--blue);
  color: var(--gold);
  padding: 90px 8vw;
  text-align: center;
}

.closing p {
  margin: 0;
  font-size: clamp(32px, 5vw, 72px);
  line-height: 1.05;
}

footer {
  padding: 26px 8vw;
  display: flex;
  justify-content: space-between;
  font: 600 12px/1.3 Arial, sans-serif;
  letter-spacing: 0.08em;
}

@media (max-width: 950px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 70px;
  }

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

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

  .author-image-wrap {
    max-width: 360px;
  }

  .statement,
  .section-heading {
    grid-template-columns: 1fr;
  }

  .section-number {
    margin-bottom: 8px;
  }

  footer {
    gap: 16px;
    flex-direction: column;
  }
}