/* ==========================================================================
   Griefcase — Layout: header, sections, grid, footer
   ========================================================================== */

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

@media (max-width: 640px) {
  .container { padding: 0 var(--space-4); }
}

/* ---- Site header ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  background: rgba(244, 238, 227, 0.72);
  backdrop-filter: blur(10px) saturate(1.1);
  -webkit-backdrop-filter: blur(10px) saturate(1.1);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) var(--ease-standard),
              background var(--dur-fast) var(--ease-standard);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-line);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-serif);
  font-size: 1.15rem;
  letter-spacing: 0.01em;
}

.brand-mark {
  width: 22px;
  height: 18px;
}

.main-nav { display: flex; align-items: center; gap: var(--space-6); }

.main-nav ul {
  display: flex;
  gap: var(--space-5);
  align-items: center;
}

.nav-link {
  font-size: var(--fs-small);
  color: var(--color-charcoal-soft);
  position: relative;
  padding: var(--space-1) 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: -2px;
  height: 1px;
  background: var(--color-charcoal);
  transition: right var(--dur-fast) var(--ease-quiet);
}

.nav-link:hover::after,
.nav-link:focus-visible::after { right: 0; }

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 20px;
  height: 1px;
  background: var(--color-charcoal);
  position: relative;
  transition: transform var(--dur-fast) var(--ease-standard), opacity var(--dur-fast);
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
}

.nav-toggle-icon::before { top: -6px; }
.nav-toggle-icon::after { top: 6px; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }

  .main-nav {
    position: fixed;
    inset: 0;
    top: 64px;
    background: var(--color-cream);
    flex-direction: column;
    padding: var(--space-6) var(--space-5);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--dur-med) var(--ease-quiet), transform var(--dur-med) var(--ease-quiet);
  }

  .main-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-5);
    width: 100%;
  }

  .nav-link { font-size: var(--fs-h3); font-family: var(--font-serif); }
}

/* ---- Sections ---- */
section {
  position: relative;
  padding: var(--space-8) 0;
}

@media (max-width: 640px) {
  section { padding: var(--space-7) 0; }
}

.section-alt { background: var(--color-cream-alt); }

.section-dark {
  background: var(--color-charcoal);
  color: var(--color-paper);
}

.section-dark .eyebrow { color: var(--color-taupe); }
.section-dark h2, .section-dark h3 { color: var(--color-paper); }

/* ---- Footer ---- */
.site-footer {
  background: var(--color-charcoal);
  color: var(--color-cream);
  padding: var(--space-7) 0 var(--space-5);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: var(--space-7);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid rgba(251, 248, 243, 0.14);
}

.footer-brand h2 {
  color: var(--color-paper);
  font-size: var(--fs-h3);
  max-width: 22ch;
}

.footer-cols {
  display: flex;
  gap: var(--space-7);
}

.footer-col h3 {
  font-family: var(--font-sans);
  font-size: var(--fs-micro);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-taupe);
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.footer-col li { margin-bottom: var(--space-2); }

.footer-col a {
  font-size: var(--fs-small);
  color: rgba(251, 248, 243, 0.78);
}

.footer-col a:hover { color: var(--color-paper); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-top: var(--space-5);
  font-size: var(--fs-micro);
  color: rgba(251, 248, 243, 0.55);
}

.footer-safety {
  font-size: var(--fs-small);
  color: rgba(251, 248, 243, 0.78);
}

.footer-safety a { color: var(--color-accent-soft); }

@media (max-width: 720px) {
  .footer-top { flex-direction: column; gap: var(--space-6); }
  .footer-cols { gap: var(--space-6); flex-wrap: wrap; }
}