:root {
  --paper: #f4efe8;
  --paper-strong: #e9dfd4;
  --ink: #2f2d32;
  --ink-soft: #465766;
  --accent: #9f4c66;
  --accent-soft: #64bcc8;
  --line: #cdbfb2;
  --white: #ffffff;
  --shadow-lg: 0 28px 60px rgba(47, 45, 50, 0.19);
  --shadow-md: 0 14px 34px rgba(47, 45, 50, 0.14);
  --radius-lg: 1.4rem;
  --radius-md: 0.8rem;
  --container: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Source Sans 3", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% -10%, rgba(159, 76, 102, 0.22), transparent 42%),
    radial-gradient(circle at 94% 14%, rgba(100, 188, 200, 0.24), transparent 35%),
    var(--paper);
  line-height: 1.5;
}

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

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

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 200;
  background: var(--ink);
  color: var(--white);
  padding: 0.6rem 1rem;
  border-radius: 0 0 var(--radius-md) 0;
}

.skip-link:focus {
  left: 0;
}

.container {
  width: min(var(--container), 92vw);
  margin-inline: auto;
}

.section-spacing {
  padding: clamp(2.4rem, 6vw, 4.2rem) 0;
}

.section-paper {
  background: rgba(255, 255, 255, 0.42);
}

.section-light {
  background:
    linear-gradient(180deg, rgba(100, 188, 200, 0.06), rgba(159, 76, 102, 0.06)),
    rgba(233, 223, 212, 0.54);
}

.section-ink {
  color: var(--paper);
  background:
    radial-gradient(circle at 80% 16%, rgba(100, 188, 200, 0.22), transparent 35%),
    radial-gradient(circle at 18% 82%, rgba(159, 76, 102, 0.2), transparent 38%),
    linear-gradient(155deg, #3a3840, #222128);
}

.section-border-top {
  border-top: 1px solid var(--line);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(205, 191, 178, 0.75);
  background: rgba(244, 239, 232, 0.9);
  backdrop-filter: blur(8px);
}

.nav-shell {
  min-height: 4.8rem;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-monogram {
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font: 600 0.75rem/1 "Source Sans 3", sans-serif;
  letter-spacing: 0.14em;
  color: var(--paper);
  background: var(--ink);
}

.brand-text {
  font-family: "Cormorant Garamond", serif;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(0.8rem, 2vw, 2rem);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  transition: color 180ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--accent);
}

.nav-cta {
  padding-inline: 1rem;
  padding-block: 0.65rem;
}

.hero-section {
  position: relative;
  overflow: clip;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 4vw, 5rem);
  align-items: center;
}

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

.eyebrow {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--accent);
  margin: 0 0 1rem;
}

.eyebrow.center {
  text-align: center;
}

.hero-title {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(2.5rem, 7vw, 5.1rem);
  line-height: 0.95;
  font-weight: 700;
}

.hero-subtitle {
  margin: 0.8rem 0 1.2rem;
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(1.45rem, 2.4vw, 2.2rem);
  color: var(--ink-soft);
}

.hero-tagline {
  margin: 0;
  max-width: 54ch;
  color: var(--ink-soft);
  font-size: 1.12rem;
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.hero-visual {
  justify-self: center;
  width: min(460px, 100%);
}

.book-flip-shell {
  width: min(380px, 100%);
  margin-inline: auto;
  perspective: 1100px;
  transform: translateZ(0);
  will-change: transform;
}

.book-flip-shell.is-intro {
  animation: bookIntro 1050ms cubic-bezier(0.2, 0.75, 0.3, 1) both;
}

.book-flip-card {
  position: relative;
  width: 100%;
  aspect-ratio: 652 / 1044;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transform-origin: center center;
  transition: transform 520ms cubic-bezier(0.22, 0.61, 0.36, 1);
  transform: translate3d(0, 0, 0) rotateY(-6deg);
  will-change: transform;
  cursor: pointer;
  outline: none;
}

.book-flip-card:focus-visible {
  box-shadow: 0 0 0 3px rgba(100, 188, 200, 0.5);
  border-radius: var(--radius-lg);
}

.book-flip-card.is-flipped {
  transform: translate3d(0, 0, 0) rotateY(180deg);
}

.book-flip-card.is-flipped .book-face-front {
  opacity: 0;
}

.book-flip-card.is-flipped .book-face-back {
  z-index: 3;
  opacity: 1;
}

.book-face {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  transform-style: preserve-3d;
  -webkit-transform-style: preserve-3d;
  transition: opacity 180ms ease;
}

.book-face-front {
  z-index: 2;
  transform: translateZ(0.1px);
  margin: 0;
  padding: clamp(0.7rem, 2vw, 1.2rem);
  background:
    linear-gradient(135deg, rgba(100, 188, 200, 0.24), rgba(159, 76, 102, 0.1)),
    var(--paper-strong);
  border: 1px solid rgba(159, 76, 102, 0.3);
  box-shadow: var(--shadow-md);
}

.cover-picture {
  display: block;
  height: 100%;
}

.cover-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: calc(var(--radius-lg) - 0.6rem);
  border: 1px solid rgba(100, 188, 200, 0.35);
  box-shadow: var(--shadow-sm);
  filter: none;
}

.book-face-back {
  z-index: 1;
  transform: rotateY(180deg) translateZ(0.1px);
  padding: 1rem;
  border: 1px solid rgba(159, 76, 102, 0.34);
  box-shadow: var(--shadow-md);
  background:
    linear-gradient(160deg, rgba(100, 188, 200, 0.08), rgba(159, 76, 102, 0.08)),
    var(--paper-strong);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.preface-title {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  color: var(--ink);
}

.preface-content {
  margin-top: 0.55rem;
  flex: 1 1 auto;
  min-height: 0;
  max-height: 100%;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  padding-right: 0.3rem;
  font-size: 0.95rem;
  line-height: 1.45;
  color: var(--ink-soft);
}

.preface-content p {
  margin: 0 0 0.85rem;
}

.preface-content p:last-child {
  margin-bottom: 0;
}

.preface-content::-webkit-scrollbar {
  width: 8px;
}

.preface-content::-webkit-scrollbar-thumb {
  background: rgba(159, 76, 102, 0.35);
  border-radius: 999px;
}

.preface-placeholder {
  margin: 0;
  color: var(--ink-soft);
}

.ink-blot {
  position: absolute;
  filter: blur(44px);
  border-radius: 999px;
  pointer-events: none;
  opacity: 0.25;
}

.ink-blot-right {
  width: min(580px, 62vw);
  height: min(580px, 62vw);
  right: -12%;
  top: -8%;
  background: rgba(100, 188, 200, 0.4);
}

.ink-blot-left {
  width: min(520px, 56vw);
  height: min(520px, 56vw);
  left: -18%;
  bottom: -26%;
  background: rgba(159, 76, 102, 0.36);
}

.section-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(1.5rem, 3vw, 2.6rem);
  align-items: start;
}

.section-title {
  margin: 0 0 1.2rem;
  font-family: "Cormorant Garamond", serif;
  font-size: clamp(2rem, 4.4vw, 3.2rem);
  line-height: 1.05;
}

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

.section-title.light {
  color: var(--paper);
}

.section-body {
  margin: 0;
  font-size: 1.08rem;
  color: var(--ink-soft);
}

.section-body.light {
  color: rgba(245, 240, 230, 0.88);
}

.card {
  padding: clamp(1.3rem, 2.8vw, 2rem);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(159, 76, 102, 0.3);
}

.card-soft {
  background:
    linear-gradient(140deg, rgba(255, 255, 255, 0.8), rgba(245, 240, 230, 0.75)),
    var(--paper);
}

.card-title {
  margin: 0 0 0.9rem;
  font-family: "Cormorant Garamond", serif;
  font-size: 1.7rem;
}

.benefit-list {
  margin: 0;
  padding-left: 1.15rem;
  display: grid;
  gap: 0.6rem;
}

.author-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(1.4rem, 3.2vw, 3rem);
  align-items: center;
}

.author-photo-shell {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(100, 188, 200, 0.52);
  box-shadow: var(--shadow-md);
}

.author-photo-shell picture {
  display: block;
}

.author-photo-shell img {
  width: 100%;
  min-height: 320px;
  object-fit: cover;
}

.narrow {
  width: min(860px, 92vw);
}

.excerpt-list {
  margin-top: 2.2rem;
  display: grid;
  gap: 1.1rem;
}

.excerpt-item {
  margin: 0;
  padding: 1.3rem;
  border-left: 3px solid var(--accent-soft);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(255, 255, 255, 0.66);
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.info-grid {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.info-card {
  margin: 0;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(100, 188, 200, 0.46);
  border-left: 4px solid var(--accent);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow-md);
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.universe-grid {
  margin-top: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.universe-layout {
  margin-top: 1.8rem;
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 1rem;
  align-items: stretch;
}

.universe-visuals {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding: 0.8rem;
  border: 1px solid rgba(159, 76, 102, 0.32);
  background:
    radial-gradient(circle at 15% 10%, rgba(100, 188, 200, 0.36), transparent 45%),
    radial-gradient(circle at 95% 85%, rgba(159, 76, 102, 0.3), transparent 42%),
    #fff;
  min-height: 100%;
}

.universe-main-visual {
  width: 100%;
  border-radius: 0.9rem;
  object-fit: cover;
  box-shadow: var(--shadow-md);
}

.universe-secondary-visual {
  position: absolute;
  right: 1.1rem;
  bottom: 4.8rem;
  width: 34%;
  border-radius: 0.8rem;
  border: 3px solid rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow-md);
}

.universe-punchline {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  margin: 0;
  padding: 0.7rem 0.8rem;
  border-radius: 0.7rem;
  background: rgba(47, 45, 50, 0.84);
  color: var(--paper);
  font-size: 0.95rem;
}

.universe-card {
  margin: 0;
  padding: 1rem;
  border-radius: 0.9rem;
  border: 1px solid rgba(159, 76, 102, 0.2);
  background: rgba(255, 255, 255, 0.88);
}

.universe-card.tone-1 {
  border-left: 4px solid #64bcc8;
}

.universe-card.tone-2 {
  border-left: 4px solid #9f4c66;
}

.universe-card.tone-3 {
  border-left: 4px solid #4f7f96;
}

.universe-card.tone-4 {
  border-left: 4px solid #be7b5f;
}

.universe-title {
  margin: 0 0 0.55rem;
  font-family: "Cormorant Garamond", serif;
  font-size: 1.45rem;
  color: var(--ink);
}

.universe-body {
  margin: 0;
  color: var(--ink-soft);
}

.universe-highlights {
  margin: 0.75rem 0 0;
  padding-left: 1rem;
  display: grid;
  gap: 0.35rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.social-grid {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.quote-card {
  margin: 0;
  padding: 1.2rem;
  border: 1px solid rgba(159, 76, 102, 0.28);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.72);
}

.quote-card blockquote {
  margin: 0;
  color: var(--ink);
}

.quote-card figcaption {
  margin-top: 0.85rem;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.format-grid {
  margin-top: 2.2rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.format-card {
  padding: 1.35rem;
  border: 1px solid rgba(159, 76, 102, 0.3);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow-md);
}

.format-type {
  margin: 0;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.format-name {
  margin: 0.55rem 0 0.2rem;
  font-family: "Cormorant Garamond", serif;
  font-size: 2rem;
}

.format-price {
  margin: 0 0 1rem;
  color: var(--ink-soft);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.55rem;
  border: 1px solid transparent;
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition:
    transform 160ms ease,
    background-color 180ms ease,
    color 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-1px);
}

.btn-ink {
  color: var(--paper);
  background: var(--ink);
  box-shadow: 0 9px 18px rgba(31, 36, 48, 0.22);
}

.btn-ink:hover,
.btn-ink:focus-visible {
  background: #111620;
}

.btn-outline {
  color: var(--ink);
  border-color: rgba(47, 45, 50, 0.35);
  background: rgba(255, 255, 255, 0.72);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-wide {
  width: 100%;
  min-height: 2.8rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #111620;
  color: rgba(245, 240, 230, 0.86);
}

.footer-shell {
  min-height: 7rem;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 1.4rem 0;
}

.footer-title {
  margin: 0;
  font-family: "Cormorant Garamond", serif;
  font-size: 1.3rem;
}

.footer-copy {
  margin: 0.35rem 0 0;
  font-size: 0.92rem;
}

@keyframes bookIntro {
  0% {
    opacity: 0;
    transform: translateY(28px) scale(0.95) rotateZ(-2deg);
  }
  60% {
    opacity: 1;
    transform: translateY(-6px) scale(1.01) rotateZ(0.4deg);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1) rotateZ(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .book-flip-shell.is-intro {
    animation: none;
  }

  .book-flip-card {
    transition: none;
    transform: none;
  }

  .book-flip-card.is-flipped {
    transform: rotateY(180deg);
  }
}

@media (max-width: 980px) {
  .nav-shell {
    grid-template-columns: auto auto;
    justify-content: space-between;
  }

  .nav-links {
    display: none;
  }

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

  .hero-visual {
    width: min(440px, 88vw);
    order: -1;
  }

  .book-flip-shell {
    width: min(360px, 88vw);
  }

  .book-flip-card {
    transform: none;
  }

  .book-flip-card.is-flipped {
    transform: rotateY(180deg);
  }

  .preface-content {
    font-size: 0.92rem;
  }

  .info-grid,
  .universe-layout,
  .universe-grid,
  .social-grid,
  .format-grid {
    grid-template-columns: 1fr;
  }

  .universe-visuals {
    min-height: 460px;
  }
}

@media (max-width: 640px) {
  .nav-cta {
    padding-inline: 0.75rem;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
    min-height: 2.9rem;
  }
}