/* Wheels Up landing page — editorial serif, warm neutrals, horizon-gold accent */

:root {
  /* Palette — echoing the cover: cream page, ink text, horizon gold */
  --ink: #1a1613;
  --ink-soft: #3a332d;
  --muted: #6b625a;
  --page: #f7f2ea;
  --page-warm: #ede4d3;
  --paper: #ffffff;
  --gold: #b8873a;
  --gold-deep: #8f6624;
  --rule: #d9cebb;

  /* Type */
  --serif: "Fraunces", "Iowan Old Style", "Georgia", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Rhythm */
  --pad-x: clamp(1.25rem, 4vw, 3rem);
  --section-y: clamp(3rem, 7vw, 6rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--gold-deep); }

/* --- Nav --- */
.topnav {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem var(--pad-x);
  background: rgba(247, 242, 234, 0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--rule);
}
.brand {
  display: flex; align-items: center; gap: 0.55rem;
  font-family: var(--sans); font-weight: 600; font-size: 0.9rem;
  letter-spacing: 0.01em;
}
.brand-mark { color: var(--gold-deep); }
.topnav nav { display: flex; gap: 1.5rem; align-items: center; font-family: var(--sans); font-size: 0.9rem; }
.topnav nav a { color: var(--ink-soft); font-weight: 500; }
.nav-cta {
  background: var(--ink);
  color: var(--page) !important;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
}
.nav-cta:hover { background: var(--gold-deep); color: var(--page) !important; }

/* --- Hero --- */
.hero {
  padding: clamp(3rem, 6vw, 6rem) var(--pad-x) clamp(2rem, 4vw, 4rem);
  background: linear-gradient(180deg, var(--page) 0%, var(--page-warm) 100%);
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
.hero-copy .kicker {
  font-family: var(--sans);
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin: 0 0 1rem;
  font-weight: 600;
}
.hero-copy h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(3.5rem, 9vw, 6.5rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  margin: 0 0 1.25rem;
  color: var(--ink);
}
.hero-copy .tagline {
  font-family: var(--serif);
  font-style: italic;
  font-size: clamp(1.15rem, 1.8vw, 1.4rem);
  color: var(--ink-soft);
  margin: 0 0 0.75rem;
  max-width: 32ch;
}
.hero-copy .byline {
  font-family: var(--sans);
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0 0 2rem;
}
.hero-art img {
  width: 100%;
  border-radius: 4px;
  box-shadow: 0 30px 60px -20px rgba(26, 22, 19, 0.35);
}

.cta-row { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.btn {
  font-family: var(--sans);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  display: inline-block;
  transition: transform 0.15s ease, background 0.2s ease, color 0.2s ease;
}
.btn-primary {
  background: var(--ink);
  color: var(--page);
}
.btn-primary:hover { background: var(--gold-deep); color: var(--page); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn-ghost:hover { background: var(--ink); color: var(--page); }

/* --- Opening pull-quote --- */
.opening {
  padding: var(--section-y) var(--pad-x);
  text-align: center;
  background: var(--paper);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.opening p {
  max-width: 42ch;
  margin: 0 auto;
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.3;
  color: var(--ink);
  font-weight: 500;
}
.opening em {
  color: var(--gold-deep);
  font-style: italic;
}

/* --- Story --- */
.story {
  padding: var(--section-y) var(--pad-x);
  background: var(--page);
}
.story-inner {
  max-width: 640px;
  margin: 0 auto;
}
.story p {
  font-size: 1.1rem;
  color: var(--ink-soft);
  margin: 0 0 1.5rem;
}
.story strong { color: var(--ink); font-weight: 600; }

/* --- Doctrine callout --- */
.doctrine {
  padding: var(--section-y) var(--pad-x);
  background: var(--ink);
  color: var(--page);
  text-align: center;
}
.doctrine-inner { max-width: 640px; margin: 0 auto; }
.doctrine p {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.4vw, 1.7rem);
  line-height: 1.45;
  margin: 0 0 1rem;
}
.doctrine-em {
  color: var(--gold);
  font-style: italic;
  font-weight: 500;
}

/* --- Section heads --- */
.section-head {
  max-width: 720px;
  margin: 0 auto clamp(2rem, 4vw, 3.5rem);
  text-align: center;
  padding: 0 var(--pad-x);
}
.section-head h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0.5rem 0 0;
}
.eyebrow {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-deep);
  font-weight: 600;
  margin: 0;
}

/* --- Reviews --- */
.reviews {
  padding: var(--section-y) 0;
  background: var(--page);
  border-top: 1px solid var(--rule);
}
.review-grid {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}
.review-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 2rem;
  margin: 0;
  border-radius: 4px;
  border-top: 3px solid var(--gold);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.review-card blockquote {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--ink-soft);
  font-style: italic;
}
.review-card blockquote::before {
  content: "\201C";
  color: var(--gold);
  font-size: 2.5rem;
  line-height: 0;
  vertical-align: -0.4em;
  margin-right: 0.15em;
  font-family: var(--serif);
}
.review-card figcaption {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--ink);
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
}
.review-card figcaption strong { font-weight: 600; }
.review-card figcaption span { color: var(--muted); font-size: 0.85rem; }

/* --- Inside / TOC --- */
.inside {
  padding: var(--section-y) 0;
  background: var(--page-warm);
  border-top: 1px solid var(--rule);
}
.toc-grid {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}
.toc-col .part-label {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-deep);
  margin: 0;
  font-weight: 600;
}
.toc-col .part-name {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 500;
  margin: 0.25rem 0 1rem;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  padding-bottom: 0.75rem;
}
.toc-col ol {
  padding-left: 1.3rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
  line-height: 1.9;
}

/* --- Buy grid --- */
.buy {
  padding: var(--section-y) 0;
  background: var(--paper);
  border-top: 1px solid var(--rule);
}
.buy-grid {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--pad-x);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.buy-card {
  display: block;
  padding: 1.5rem 1.75rem;
  border: 1px solid var(--rule);
  background: var(--page);
  border-radius: 4px;
  transition: transform 0.15s ease, border-color 0.2s ease, background 0.2s ease;
}
.buy-card:hover {
  transform: translateY(-2px);
  border-color: var(--gold);
  background: var(--paper);
}
.buy-retailer {
  font-family: var(--sans);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
  margin: 0;
}
.buy-format {
  font-family: var(--serif);
  font-size: 1.35rem;
  margin: 0.35rem 0 0.15rem;
  color: var(--ink);
  font-weight: 500;
}
.buy-price {
  font-family: var(--sans);
  font-size: 1.05rem;
  color: var(--gold-deep);
  font-weight: 600;
  margin: 0;
}
.buy-note {
  max-width: 700px;
  margin: 2rem auto 0;
  padding: 0 var(--pad-x);
  text-align: center;
  font-family: var(--sans);
  font-size: 0.9rem;
  color: var(--muted);
  font-style: italic;
}

/* --- Author --- */
.author {
  padding: var(--section-y) var(--pad-x);
  background: var(--page);
  border-top: 1px solid var(--rule);
}
.author-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  align-items: center;
}
.author-copy .eyebrow { margin-bottom: 0.5rem; }
.author-copy h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin: 0 0 1.25rem;
  letter-spacing: -0.015em;
}
.author-copy p {
  font-size: 1.05rem;
  color: var(--ink-soft);
  margin: 0 0 1.15rem;
}
.author-tag { color: var(--muted) !important; font-size: 0.95rem !important; }
.author-art img {
  border-radius: 4px;
  box-shadow: 0 20px 40px -15px rgba(26, 22, 19, 0.3);
}

/* --- Final CTA band --- */
.cta-band {
  padding: var(--section-y) var(--pad-x);
  background: var(--gold-deep);
  color: var(--page);
  text-align: center;
}
.cta-band-inner { max-width: 640px; margin: 0 auto; }
.cta-band h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  margin: 0 0 1rem;
  color: var(--page);
}
.cta-band p {
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.1rem;
  margin: 0 0 2rem;
  color: rgba(247, 242, 234, 0.9);
}
.cta-band .btn-primary {
  background: var(--page);
  color: var(--ink);
}
.cta-band .btn-primary:hover { background: var(--ink); color: var(--page); }

/* --- Footer --- */
.site-footer {
  padding: 2rem var(--pad-x);
  background: var(--ink);
  color: rgba(247, 242, 234, 0.6);
  font-family: var(--sans);
  font-size: 0.85rem;
  text-align: center;
}
.footer-inner p { margin: 0.25rem 0; }

/* --- Responsive --- */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; text-align: left; }
  .hero-art { order: -1; max-width: 340px; margin: 0 auto; }
  .review-grid { grid-template-columns: 1fr; }
  .toc-grid { grid-template-columns: repeat(2, 1fr); }
  .buy-grid { grid-template-columns: repeat(2, 1fr); }
  .author-inner { grid-template-columns: 1fr; }
  .author-art { max-width: 280px; margin: 0 auto; }
  .topnav nav a:not(.nav-cta) { display: none; }
}
@media (max-width: 520px) {
  .toc-grid { grid-template-columns: 1fr; }
  .buy-grid { grid-template-columns: 1fr; }
  .hero-copy h1 { font-size: 3.5rem; }
}