:root {
  --book-bg: #0f0d0b;
  --book-dark: #171310;
  --book-soft: #241c17;
  --book-gold: #d6a84f;
  --book-gold-soft: rgba(214, 168, 79, 0.16);
  --book-text: #f6efe7;
  --book-muted: #b8aaa0;
  --book-border: rgba(255, 255, 255, 0.1);
  --book-radius: 24px;
  --book-shadow: 0 25px 80px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--book-bg);
  color: var(--book-text);
}

a {
  text-decoration: none;
}

.book-navbar {
  background: rgba(15, 13, 11, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--book-border);
}

.navbar-brand {
  color: var(--book-text);
  font-weight: 800;
  font-size: 1.4rem;
}

.navbar-brand span {
  color: var(--book-gold);
}

.nav-link {
  color: var(--book-muted);
  font-weight: 500;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--book-gold);
}

.navbar-toggler {
  border-color: var(--book-border);
}

.navbar-toggler-icon {
  filter: invert(1);
}

.btn-book {
  background: var(--book-gold);
  color: #16110c;
  border: none;
  border-radius: 999px;
  padding: 0.8rem 1.6rem;
  font-weight: 800;
  box-shadow: 0 15px 30px rgba(214, 168, 79, 0.22);
}

.btn-book:hover {
  background: #e8bc67;
  color: #16110c;
  transform: translateY(-2px);
}

.btn-outline-light {
  border-radius: 999px;
  padding: 0.8rem 1.6rem;
  font-weight: 700;
}

.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 130px 0 80px;
  background:
    radial-gradient(circle at top left, rgba(214, 168, 79, 0.22), transparent 34%),
    linear-gradient(135deg, #0f0d0b 0%, #1c1510 100%);
}

.eyebrow,
.section-tag {
  display: inline-flex;
  align-items: center;
  background: var(--book-gold-soft);
  color: var(--book-gold);
  border: 1px solid rgba(214, 168, 79, 0.28);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-weight: 800;
  font-size: 0.82rem;
  margin-bottom: 1rem;
}

.hero-section h1,
.section-padding h2,
.buy-card h2 {
  font-size: clamp(2.4rem, 6vw, 5rem);
  line-height: 1;
  font-weight: 900;
  letter-spacing: -0.05em;
}

.section-padding h2,
.buy-card h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.hero-text {
  color: var(--book-muted);
  font-size: 1.15rem;
  max-width: 580px;
  margin: 1.4rem 0 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero-stats {
  display: flex;
  gap: 1.2rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.hero-stats div {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--book-border);
  border-radius: 18px;
  padding: 1rem 1.2rem;
  min-width: 120px;
}

.hero-stats strong {
  display: block;
  color: var(--book-gold);
  font-size: 1.3rem;
}

.hero-stats span {
  color: var(--book-muted);
  font-size: 0.9rem;
}

.book-cover-card {
  position: relative;
  display: inline-flex;
  padding: 24px;
  border-radius: 36px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--book-border);
  box-shadow: var(--book-shadow);
}

.book-cover-card::before {
  content: "";
  position: absolute;
  inset: -18px;
  border-radius: 42px;
  background: radial-gradient(circle, rgba(214, 168, 79, 0.2), transparent 70%);
  z-index: -1;
}

.book-cover {
  width: min(340px, 76vw);
  height: 500px;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.08), transparent),
    linear-gradient(160deg, #3a2418, #0e0b09 55%, #d6a84f);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2rem;
  text-align: left;
  box-shadow: 18px 20px 0 rgba(0, 0, 0, 0.24);
}

.book-cover span {
  font-size: 2.2rem;
  font-weight: 900;
  line-height: 1;
}

.book-cover small {
  color: rgba(255, 255, 255, 0.72);
  margin-top: 1rem;
}

.section-padding {
  padding: 100px 0;
}

.section-dark {
  background: var(--book-dark);
}

.section-soft {
  background: #15110f;
}

.info-card,
.benefit-card,
.testimonial-card,
.buy-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--book-border);
  border-radius: var(--book-radius);
  padding: 2rem;
  box-shadow: var(--book-shadow);
}

.info-card i,
.benefit-card i {
  width: 56px;
  height: 56px;
  display: inline-grid;
  place-items: center;
  background: var(--book-gold-soft);
  color: var(--book-gold);
  border-radius: 18px;
  font-size: 1.6rem;
  margin-bottom: 1.2rem;
}

.info-card p,
.benefit-card p,
.testimonial-card p,
.section-padding p,
.buy-card p {
  color: var(--book-muted);
}

.book-list {
  padding: 0;
  margin: 1.5rem 0 0;
  list-style: none;
}

.book-list li {
  margin-bottom: 0.9rem;
  color: var(--book-muted);
}

.book-list i {
  color: var(--book-gold);
  margin-right: 0.5rem;
}

.benefit-card {
  height: 100%;
  transition: 0.25s ease;
}

.benefit-card:hover {
  transform: translateY(-8px);
  border-color: rgba(214, 168, 79, 0.38);
}

.quote-section {
  padding: 90px 0;
  background:
    linear-gradient(rgba(15, 13, 11, 0.88), rgba(15, 13, 11, 0.88)),
    radial-gradient(circle at center, rgba(214, 168, 79, 0.2), transparent 60%);
  text-align: center;
}

.quote-section blockquote {
  font-size: clamp(1.8rem, 4vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  max-width: 950px;
  margin: auto;
}

.author-photo {
  width: 100%;
  min-height: 360px;
  border-radius: var(--book-radius);
  background:
    linear-gradient(135deg, rgba(214, 168, 79, 0.25), transparent),
    var(--book-soft);
  display: grid;
  place-items: center;
  border: 1px solid var(--book-border);
}

.author-photo i {
  font-size: 7rem;
  color: var(--book-gold);
}

.testimonial-card {
  height: 100%;
}

.testimonial-card strong {
  color: var(--book-gold);
}

.buy-section {
  padding: 100px 0;
  background:
    radial-gradient(circle at top right, rgba(214, 168, 79, 0.22), transparent 34%),
    var(--book-bg);
}

.buy-card {
  padding: clamp(2rem, 5vw, 4rem);
}

.price {
  display: flex;
  align-items: end;
  gap: 1rem;
  margin: 1.5rem 0;
}

.price span {
  font-size: 3rem;
  font-weight: 900;
  color: var(--book-gold);
}

.price small {
  color: var(--book-muted);
  text-decoration: line-through;
  font-size: 1.1rem;
}

.countdown-text strong {
  color: var(--book-gold);
}

.buy-form {
  background: rgba(0, 0, 0, 0.24);
  border: 1px solid var(--book-border);
  border-radius: 22px;
  padding: 1.5rem;
}

.buy-form .form-control,
.buy-form .form-select {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--book-border);
  color: var(--book-text);
  border-radius: 14px;
  margin-bottom: 1rem;
  padding: 0.9rem 1rem;
}

.buy-form .form-control::placeholder {
  color: #8f8177;
}

.buy-form .form-select option {
  color: #111;
}

.form-note {
  font-size: 0.82rem;
  text-align: center;
  margin: 1rem 0 0;
}

.footer {
  padding: 60px 0;
  background: #090807;
  border-top: 1px solid var(--book-border);
}

.footer p,
.footer small {
  color: var(--book-muted);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 1.2rem 0;
}

.social-links a {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--book-gold);
  background: var(--book-gold-soft);
  border-radius: 50%;
}

@media (max-width: 991px) {
  .hero-section {
    text-align: center;
  }

  .hero-text {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-actions,
  .hero-stats {
    justify-content: center;
  }

  .book-cover {
    height: 430px;
  }
}

@media (max-width: 575px) {
  .section-padding,
  .buy-section {
    padding: 70px 0;
  }

  .hero-section {
    padding-top: 120px;
  }

  .book-cover {
    height: 390px;
  }

  .price span {
    font-size: 2.3rem;
  }
}

.book-cover-img {
  width: min(340px, 78vw);
  border-radius: 18px;
  display: block;
  box-shadow: 18px 20px 0 rgba(0, 0, 0, 0.35);
  transition: transform .3s ease;
}

.book-cover-img:hover {
  transform: scale(1.03) rotate(-1deg);
}

.checkout-body {
  background:
    radial-gradient(circle at top left, rgba(143, 188, 212, 0.18), transparent 35%),
    var(--book-bg);
}

.checkout-page {
  min-height: 100vh;
  padding: 130px 0 80px;
}

.checkout-card,
.order-summary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--book-border);
  border-radius: var(--book-radius);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  box-shadow: var(--book-shadow);
}

.checkout-card h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.05em;
}

.checkout-card p {
  color: var(--book-muted);
}

.format-options {
  display: grid;
  gap: 1rem;
  margin: 2rem 0;
}

.format-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 1rem;
  align-items: center;
  background: rgba(0, 0, 0, 0.24);
  border: 1px solid var(--book-border);
  border-radius: 18px;
  padding: 1rem;
  cursor: pointer;
  transition: .25s ease;
}

.format-card:hover {
  border-color: rgba(143, 188, 212, 0.45);
  transform: translateY(-2px);
}

.format-card input {
  accent-color: var(--book-gold);
}

.format-card strong {
  display: block;
}

.format-card span {
  color: var(--book-muted);
  font-size: .9rem;
}

.format-card b {
  color: var(--book-gold);
}

.checkout-form label {
  color: var(--book-muted);
  font-weight: 700;
  margin-bottom: .4rem;
}

.checkout-form .form-control,
.checkout-form .form-select {
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--book-border);
  color: var(--book-text);
  border-radius: 14px;
  padding: .9rem 1rem;
}

.checkout-form .form-control::placeholder {
  color: #7f909c;
}

.checkout-form .form-select option {
  color: #111;
}

.order-summary {
  position: sticky;
  top: 110px;
}

.summary-cover {
  text-align: center;
  margin-bottom: 1.5rem;
}

.summary-cover img {
  width: min(220px, 70%);
  border-radius: 14px;
  box-shadow: 14px 16px 0 rgba(0, 0, 0, 0.28);
}

.order-summary h3 {
  font-weight: 900;
  margin-bottom: .2rem;
}

.order-summary p {
  color: var(--book-muted);
}

.summary-line,
.summary-total {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--book-border);
}

.summary-line span,
.summary-total span,
.order-summary small {
  color: var(--book-muted);
}

.summary-total strong {
  color: var(--book-gold);
  font-size: 1.25rem;
}

@media (max-width: 991px) {
  .order-summary {
    position: static;
  }
}