:root {
  --bg-dark: #172022;
  --bg-dark-soft: #223033;
  --bg-light: #f4efe6;
  --bg-soft: #e4ece7;
  --text-dark: #172022;
  --text-mid: #46595c;
  --text-light: #f7f3ec;
  --accent: #97b8a1;
  --accent-dark: #5e7b69;
  --line: rgba(23, 32, 34, 0.12);
  --shadow: 0 24px 60px rgba(14, 20, 21, 0.12);
  --container: 1180px;
}

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

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    "Avenir Next", "Segoe UI", "Helvetica Neue", "Noto Sans", Arial, sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
}

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

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 10;
  padding: 0.8rem 1rem;
  border-radius: 999px;
  background: white;
}

.skip-link:focus {
  top: 1rem;
}

.container {
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: blur(18px);
  background: rgba(23, 32, 34, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand,
.site-nav a {
  color: var(--text-light);
}

.brand {
  font-weight: 800;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.site-nav a {
  padding: 0.7rem 0.9rem;
  border-radius: 999px;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(255, 255, 255, 0.08);
}

.hero,
.section {
  padding: clamp(4.5rem, 8vw, 8rem) 0;
}

.hero {
  background:
    radial-gradient(circle at top right, rgba(151, 184, 161, 0.15), transparent 26%),
    linear-gradient(160deg, #182123 0%, #2b3b3f 58%, #5a4438 100%);
  color: var(--text-light);
}

.hero-grid,
.contact-card {
  display: grid;
  gap: 1.5rem;
}

.bundle-grid,
.bundle-stack {
  display: grid;
  gap: 1.5rem;
}

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 800;
  color: var(--accent);
}

h1,
h2,
h3 {
  margin: 0;
  font-family:
    "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Baskerville,
    "Times New Roman", serif;
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
}

h1 {
  font-size: clamp(3rem, 9vw, 5.8rem);
  max-width: 10ch;
}

h2 {
  font-size: clamp(2rem, 5vw, 3.6rem);
}

h3 {
  font-size: clamp(1.35rem, 2vw, 1.8rem);
}

.hero-text,
.section-intro,
.book-card p,
.contact-card p,
.structure-card p {
  max-width: 62ch;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  padding: 0.9rem 1.3rem;
  border-radius: 999px;
  font-weight: 800;
}

.button-primary {
  background: var(--accent);
  color: var(--text-dark);
}

.button-secondary {
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.06);
}

.button-muted {
  background: rgba(23, 32, 34, 0.08);
  color: var(--text-mid);
}

.hero-panel,
.book-card,
.structure-card,
.contact-card {
  padding: 1.4rem;
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero-panel {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-panel-label,
.book-card-kicker {
  margin: 0 0 0.8rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 800;
}

.hero-book-list {
  display: grid;
  gap: 0.9rem;
}

.hero-book-item {
  display: grid;
  grid-template-columns: 4.25rem 1fr;
  gap: 0.85rem;
  align-items: center;
}

.hero-book-item p {
  margin: 0;
  color: var(--text-light);
}

.mini-cover-image {
  aspect-ratio: 4 / 5.4;
  width: 100%;
  border-radius: 14px;
  box-shadow: 0 14px 28px rgba(8, 12, 14, 0.22);
  object-fit: cover;
}

.section-light {
  background: var(--bg-light);
}

.section-soft {
  background: var(--bg-soft);
}

.section-dark {
  background: var(--bg-dark);
  color: var(--text-light);
}

.section-heading {
  margin-bottom: 2rem;
}

.book-grid {
  display: grid;
  gap: 1rem;
}

.bundle-showcase,
.bundle-order-form,
.payment-panel {
  display: grid;
  gap: 1rem;
}

.bundle-summary-list {
  display: grid;
  gap: 0.9rem;
}

.bundle-summary-item {
  padding: 1rem;
  border-radius: 20px;
  background: rgba(23, 32, 34, 0.05);
  border: 1px solid rgba(23, 32, 34, 0.08);
}

.bundle-summary-item p {
  margin: 0;
}

.bundle-summary-title {
  font-weight: 800;
  margin-bottom: 0.35rem !important;
}

.bundle-static-card {
  padding: 1rem;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(23, 32, 34, 0.12);
}

.bundle-static-card p {
  margin: 0;
}

.bundle-static-title,
.form-section-title {
  font-weight: 800;
}

.bundle-static-title {
  margin-bottom: 0.35rem !important;
}

.bundle-choice-grid {
  display: grid;
  gap: 0.9rem;
}

.bundle-choice {
  position: relative;
  display: block;
}

.bundle-choice input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.bundle-choice-body {
  display: grid;
  gap: 0.35rem;
  padding: 1rem;
  border-radius: 20px;
  border: 1px solid rgba(23, 32, 34, 0.12);
  background: rgba(255, 255, 255, 0.74);
  transition:
    border-color 180ms ease,
    transform 180ms ease,
    background-color 180ms ease;
}

.bundle-choice input:checked + .bundle-choice-body {
  border-color: rgba(94, 123, 105, 0.5);
  background: rgba(151, 184, 161, 0.16);
}

.bundle-choice-title {
  font-weight: 800;
}

.bundle-choice-meta,
.order-summary-label,
.payment-panel-note,
.payment-summary-text,
.form-block-header p,
.form-note {
  color: var(--text-mid);
}

.bundle-choice-price,
.payment-reset-link {
  font-weight: 800;
  color: var(--accent-dark);
}

.form-grid-two,
.form-grid-address {
  display: grid;
  gap: 1rem;
}

.form-grid-two-compact {
  grid-template-columns: minmax(7rem, 9rem) minmax(0, 1fr);
  align-items: end;
}

.form-section {
  padding-top: 0.25rem;
}

.form-section-title {
  margin: 0;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

.form-field {
  display: grid;
  gap: 0.55rem;
}

.form-field label {
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text-mid);
}

.form-field-quantity input {
  max-width: 7rem;
}

.form-field input,
.form-field textarea {
  width: 100%;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(23, 32, 34, 0.12);
  background: rgba(255, 255, 255, 0.86);
  color: var(--text-dark);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: rgba(23, 32, 34, 0.45);
}

.order-summary-card {
  padding: 1rem;
  border-radius: 20px;
  background: rgba(23, 32, 34, 0.05);
  border: 1px solid rgba(23, 32, 34, 0.08);
  display: flex;
  align-items: center;
}

.order-summary-card p {
  margin: 0;
}

.order-summary-inline {
  width: 100%;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

.order-summary-price {
  font-size: clamp(1.2rem, 2.6vw, 1.55rem);
  font-weight: 800;
}

.order-summary-label {
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.form-note {
  font-size: 0.8rem;
  line-height: 1.45;
}

.form-status {
  margin: 0;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(23, 32, 34, 0.12);
  background: rgba(255, 255, 255, 0.88);
  color: var(--text-dark);
}

.form-status.is-success {
  border-color: rgba(94, 123, 105, 0.28);
  background: rgba(151, 184, 161, 0.14);
}

.form-status.is-error {
  border-color: rgba(145, 74, 74, 0.24);
  background: rgba(145, 74, 74, 0.08);
}

.payment-panel {
  background: rgba(255, 255, 255, 0.95);
}

.paypal-buttons {
  min-height: 3rem;
}

.book-card {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
}

.book-thumbnail-image {
  width: min(100%, 12rem);
  margin-bottom: 1.1rem;
  display: block;
  border-radius: 18px;
  filter: drop-shadow(0 18px 28px rgba(14, 20, 21, 0.12));
  object-fit: cover;
}

.book-card-featured {
  background:
    linear-gradient(160deg, rgba(151, 184, 161, 0.22), rgba(255, 255, 255, 0.86)),
    white;
}

.book-card-placeholder {
  background: rgba(255, 255, 255, 0.5);
}

.structure-card {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
}

.structure-card pre {
  overflow: auto;
  margin: 0;
  padding: 1rem;
  border-radius: 20px;
  background: #f9f6f0;
  border: 1px solid rgba(23, 32, 34, 0.08);
}

.contact-card {
  background:
    linear-gradient(160deg, rgba(151, 184, 161, 0.08), rgba(255, 255, 255, 0.03));
  border: 1px solid rgba(255, 255, 255, 0.12);
}

@media (min-width: 760px) {
  .container {
    width: min(calc(100% - 3rem), var(--container));
  }

  .hero-grid,
  .contact-card {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 2rem;
    align-items: start;
  }

  .book-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .form-grid-two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .form-grid-address {
    grid-template-columns: 0.7fr 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .bundle-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
  }
}