/* =========================
   Shared shell primitives
   ========================= */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg-linen);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* =========================
   Top navigation component
   ========================= */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: var(--nav-blur-bg);
  border-bottom: 1px solid var(--border-beige);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.nav-brand-link {
  text-decoration: none;
  min-width: 0;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  white-space: nowrap;
}

.nav-logo {
  width: 48px;
  height: 48px;
  border-radius: 999px;
  object-fit: cover;
  border: 1px solid rgba(0, 0, 0, 0.06);
  flex-shrink: 0;
}

.nav-brand-text {
  min-width: 0;
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
  justify-content: flex-end;
  min-width: 0;
}

.nav-links a {
  text-decoration: none;
  color: inherit;
  position: relative;
  padding-bottom: 2px;
  white-space: nowrap;
  transition: color 0.18s ease-out;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--accent-walnut);
  transition: width 0.18s ease-out;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

/* =========================
   Bottom navigation component
   ========================= */

.page-nav-component,
.page-arrows,
.essay-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.4rem 1.25rem 3rem;
}

.page-nav-component[data-width="reading"],
.essay-nav[data-width="reading"] {
  max-width: var(--reading-width);
}

.page-nav-inner {
  border-top: 1px solid var(--border-beige);
  padding-top: 1rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-nav-link,
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  color: var(--accent-walnut);
  font-size: 0.96rem;
  transition: color 0.18s ease-out, transform 0.18s ease-out;
}

.page-nav-link:hover,
.arrow-link:hover {
  color: var(--text-primary);
  transform: translateY(-1px);
}

.page-nav-link span,
.arrow-link span {
  color: var(--text-secondary);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Variant: simple text links */
.page-nav-component[data-variant="simple"] .page-nav-link {
  gap: 0;
}

.page-nav-component[data-variant="simple"] .page-nav-link span {
  display: none;
}

/* Optional alignment helpers */
.page-nav-inner.align-start {
  justify-content: flex-start;
}

.page-nav-inner.align-center {
  justify-content: center;
}

.page-nav-inner.align-end {
  justify-content: flex-end;
}

/* =========================
   Section Header Components
   ========================= */

.section-heading {
  margin-bottom: 1rem;
}

.section-heading-title {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.025em;
}

.section-heading-copy {
  margin: 0.42rem 0 0;
  color: var(--text-secondary);
  font-size: 0.97rem;
  line-height: 1.72;
  max-width: 42rem;
}

.section-kicker {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.95rem;
}

.section-kicker--spacious {
  margin-bottom: 1.15rem;
}

.section-kicker-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.95rem;
}

.section-kicker-link {
  color: var(--accent-walnut);
  text-decoration: none;
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 1px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.section-kicker-link:hover {
  color: var(--accent-deep);
  border-bottom-color: rgba(162, 126, 92, 0.45);
}



/* =========================
   Responsive
   ========================= */

@media (max-width: 640px) {
  .nav-inner {
    padding: 0.85rem 1rem;
    gap: 1rem;
  }

  .nav-logo {
    width: 24px;
    height: 24px;
  }

  .page-nav-component,
  .page-arrows,
  .essay-nav {
    padding-left: 1rem;
    padding-right: 1rem;
    padding-bottom: 2rem;
  }

  .nav-brand {
    font-size: 0.9rem;
  }

  .nav-links {
    gap: 0.9rem;
    font-size: 0.88rem;
  }
}