/* ============================================================
   HIGH BROW SOCIETY — Base
   Body type, layout primitives, buttons, shared utilities.
   ============================================================ */

body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: 400;
  color: var(--color-charcoal);
  background-color: var(--color-ivory);
  overflow-x: hidden;
}

/* --- Layout primitive --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* --- Display type --- */
.display,
h1.display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: var(--ls-tight);
}

/* --- Eyebrow label --- */
.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--fs-eyebrow);
  font-weight: 400;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--color-champagne-deep);
  display: inline-flex;
  align-items: center;
  gap: 0.85em;
}

/* small gold tick that precedes an eyebrow when given the modifier */
.eyebrow--ruled::before {
  content: "";
  width: clamp(28px, 4vw, 52px);
  height: 1px;
  background: var(--color-champagne);
  display: inline-block;
}

/* --- Buttons --- */
.btn {
  --btn-px: clamp(1.4rem, 1rem + 1vw, 2.1rem);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7em;
  padding: 1.05em var(--btn-px);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  line-height: 1;
  border-radius: var(--radius-sm);
  transition: background-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
  will-change: transform;
}

.btn:active { transform: translateY(1px); }

/* Primary — solid champagne */
.btn--primary {
  background-color: var(--color-charcoal);
  color: var(--color-ivory);
  border: 1px solid var(--color-charcoal);
}
.btn--primary:hover {
  background-color: var(--color-champagne-deep);
  border-color: var(--color-champagne-deep);
  color: var(--color-white);
}

/* Ghost — hairline outline */
.btn--ghost {
  background-color: transparent;
  color: var(--color-charcoal);
  border: 1px solid var(--color-line);
}
.btn--ghost:hover {
  border-color: var(--color-charcoal);
}

/* Light — for use over dark imagery */
.btn--light {
  background-color: transparent;
  color: var(--color-ivory);
  border: 1px solid rgba(250, 246, 239, 0.55);
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}
.btn--light:hover {
  background-color: var(--color-ivory);
  color: var(--color-charcoal);
  border-color: var(--color-ivory);
}

/* Text link with animated gold underline */
.link-underline {
  position: relative;
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  padding-bottom: 4px;
}
.link-underline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--color-champagne);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--dur-med) var(--ease-out);
}
.link-underline:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* --- Breadcrumb (shared across all inner pages) --- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: var(--space-md);
  font-family: var(--font-sans);
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
  color: var(--color-charcoal-mute);
}
.breadcrumb a {
  color: var(--color-charcoal-mute);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.breadcrumb a:hover { color: var(--color-champagne-deep); }
.breadcrumb [aria-current="page"] { color: var(--color-charcoal-soft); }
.breadcrumb__sep { color: var(--color-line); }

/* --- Inline content link (within body copy) --- */
.text-link {
  color: var(--color-champagne-deep);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.16em;
  text-decoration-color: var(--color-champagne-soft);
  transition: text-decoration-color var(--dur-fast) var(--ease-out);
}
.text-link:hover { text-decoration-color: var(--color-champagne); }

/* --- Accessibility helpers --- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  overflow: hidden;
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--gutter);
  z-index: calc(var(--z-menu) + 1);
  background: var(--color-charcoal);
  color: var(--color-ivory);
  padding: 0.75em 1.25em;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  letter-spacing: var(--ls-wide);
  transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: var(--space-sm); }

/* lock scroll when the mobile menu is open */
body.is-locked { overflow: hidden; }

/* ============================================================
   Scroll-triggered entrance reveal (shared across sections)
   A container marked [data-observe] gains .is-inview when it
   enters the viewport; its [data-reveal] children then rise in,
   staggered via a per-item --reveal-delay set in main.js.
   ============================================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  will-change: opacity, transform;
}
.is-inview [data-reveal] {
  animation: revealUp var(--dur-slow) var(--ease-out) forwards;
  animation-delay: var(--reveal-delay, 0ms);
}
@keyframes revealUp {
  to { opacity: 1; transform: translateY(0); }
}

/* Fallback: if IntersectionObserver is unavailable, show everything */
.no-observe [data-reveal] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; animation: none; }
}

/* --- Sticky mobile book bar --- */
.sticky-cta {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: calc(var(--z-header) - 1);
  padding: 0.7rem var(--gutter) calc(0.7rem + env(safe-area-inset-bottom, 0px));
  background: color-mix(in srgb, var(--color-ivory) 90%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-top: 1px solid var(--color-line);
  transform: translateY(0);
  transition: transform var(--dur-med) var(--ease-out);
}
.sticky-cta.is-tucked { transform: translateY(140%); }
.sticky-cta__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  text-align: center;
  font-family: var(--font-sans);
  font-size: var(--fs-eyebrow);
  letter-spacing: var(--ls-eyebrow);
  text-transform: uppercase;
  color: var(--color-ivory);
  background: var(--color-champagne);
  text-decoration: none;
  padding: 0.95rem 1.5rem;
  border-radius: 999px;
  transition: background var(--dur-fast) var(--ease-out);
}
.sticky-cta__btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  flex: none;
}
.sticky-cta__btn:hover { background: var(--color-champagne-deep); }

@media (min-width: 760px) {
  .sticky-cta { display: none; }
}
@media (max-width: 759px) {
  body { padding-bottom: 4.5rem; }
}