:root {
  --navy: #0d3158;
  --navy-dark: #071e38;
  --navy-soft: #1d4773;
  --gold: #d9971d;
  --gold-light: #efb33a;
  --cream: #faf7f0;
  --ink: #15202d;
  --muted: #65707c;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "Inter", Arial, sans-serif;
}

h1,
h2,
h3,
.hero-kicker,
.section-label,
.cta-small {
  font-family: "Oswald", "Arial Narrow", Arial, sans-serif;
}

.book-hero {
  position: relative;
  overflow: hidden;
  min-height: 690px;
  display: flex;
  align-items: center;
  color: #fff;
  background:
    linear-gradient(
      90deg,
      rgba(7, 30, 56, 0.97) 0%,
      rgba(13, 49, 88, 0.92) 42%,
      rgba(13, 49, 88, 0.44) 72%,
      rgba(7, 30, 56, 0.18) 100%
    ),
    url("/images/book-hero-bg.jpg") center 58% / cover no-repeat;
}

.book-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(
      circle at 69% 56%,
      rgba(239, 179, 58, 0.28),
      transparent 29%
    );
}

.book-hero .container {
  position: relative;
  z-index: 2;
}

.hero-row {
  padding: 72px 0;
}

.hero-kicker {
  color: var(--gold-light);
  font-size: clamp(1.4rem, 2.5vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.hero-title {
  max-width: 720px;
  margin: 0;
  font-size: clamp(4rem, 8vw, 7.8rem);
  font-weight: 700;
  line-height: 0.92;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  text-shadow: 0 5px 16px rgba(0, 0, 0, 0.28);
}

.hero-title span {
  display: block;
}

.hero-subtitle {
  max-width: 630px;
  margin: 26px 0 0;
  color: var(--gold-light);
  font-size: clamp(1rem, 1.8vw, 1.35rem);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-copy {
  max-width: 590px;
  margin: 24px 0 30px;
  font-size: 1.05rem;
  line-height: 1.75;
}

.book-btn {
  min-width: 225px;
  padding: 15px 28px;
  border: 0;
  border-radius: 2px;
  color: #fff;
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  font-size: 1.02rem;
  font-weight: 700;
  text-transform: uppercase;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.18);
  transition:
    transform 160ms ease,
    box-shadow 160ms ease;
}

.book-btn:hover,
.book-btn:focus {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 15px 34px rgba(0, 0, 0, 0.24);
}

.book-stage {
  display: flex;
  justify-content: center;
  perspective: 1400px;
  padding: 25px 30px;
}

.book-mockup {
  position: relative;
  width: min(365px, 78vw);
  transform: rotateY(-10deg) rotateX(1deg);
  transform-style: preserve-3d;
  filter: drop-shadow(26px 32px 20px rgba(0, 0, 0, 0.38));
}

.book-mockup::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 2%;
  right: -18px;
  width: 24px;
  height: 96%;
  border-radius: 0 4px 4px 0;
  background:
    repeating-linear-gradient(
      90deg,
      #f8f7f1 0 3px,
      #d9d6ce 3px 4px
    );
  transform: translateZ(-8px);
}

.book-mockup::after {
  content: "";
  position: absolute;
  z-index: -2;
  top: 1.4%;
  right: -28px;
  width: 17px;
  height: 97.2%;
  background: #173d66;
  transform: translateZ(-14px);
}

.book-mockup img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 2px;
}

.author-section {
  padding: 85px 0;
  background: var(--cream);
}

.section-label {
  margin-bottom: 8px;
  color: var(--gold);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.author-section h2,
.book-description h2 {
  margin-bottom: 24px;
  color: var(--navy);
  font-size: clamp(2.1rem, 4vw, 3.45rem);
  font-weight: 700;
  text-transform: uppercase;
}

.author-section p {
  max-width: 760px;
  margin-bottom: 16px;
  font-size: 1.05rem;
  line-height: 1.8;
}

.author-photo-wrap {
  max-width: 390px;
  margin-left: auto;
  padding: 12px;
  border: 1px solid rgba(13, 49, 88, 0.12);
  background: #fff;
  box-shadow: 0 18px 45px rgba(13, 49, 88, 0.14);
}

.author-photo {
  display: block;
  width: 100%;
  aspect-ratio: 0.68;
  object-fit: cover;
  object-position: center top;
}

.book-description {
  padding: 90px 0;
  background: #fff;
}

.description-container {
  max-width: 1040px;
}

.description-copy {
  font-size: 1.06rem;
  line-height: 1.85;
}

.description-copy > p {
  margin-bottom: 20px;
}

.learn-card {
  margin-top: 38px;
  padding: 34px 36px;
  border-left: 5px solid var(--gold);
  background: #f7f7f7;
}

.learn-card h3 {
  margin: 0 0 18px;
  color: var(--navy);
  font-size: 1.4rem;
  font-weight: 700;
  text-transform: uppercase;
}

.learn-card ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 30px;
  margin: 0;
  padding-left: 20px;
}

.learn-card li::marker {
  color: var(--gold);
}

.final-cta {
  padding: 48px 0;
  color: #fff;
  background: linear-gradient(135deg, var(--navy-dark), var(--navy));
}

.cta-small {
  color: #fff;
  font-size: 1.2rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.final-cta h2 {
  color: var(--gold-light);
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700;
  text-transform: uppercase;
}

.book-btn-light {
  min-width: 245px;
}

@media (max-width: 991.98px) {
  .book-hero {
    min-height: 0;
    text-align: center;
    background-position: 62% center;
  }

  .hero-copy,
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }

  .book-stage {
    padding-top: 10px;
  }

  .author-photo-wrap {
    margin: 0 auto;
  }

  .author-section {
    text-align: center;
  }
}

@media (max-width: 767.98px) {
  .hero-row {
    padding: 58px 0;
  }

  .hero-title {
    font-size: clamp(3.55rem, 17vw, 5.2rem);
  }

  .author-section,
  .book-description {
    padding: 65px 0;
  }

  .learn-card {
    padding: 28px 24px;
  }

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

@media (max-width: 575.98px) {
  .book-hero {
    background:
      linear-gradient(
        rgba(7, 30, 56, 0.88),
        rgba(7, 30, 56, 0.88)
      ),
      url("/images/book-hero-bg.jpg") center / cover no-repeat;
  }

  .hero-title {
    font-size: 3.65rem;
  }

  .book-mockup {
    width: min(285px, 76vw);
  }

  .author-photo-wrap {
    max-width: 300px;
  }

  .book-btn,
  .book-btn-light {
    width: 100%;
  }
}