/* layout.css — layout primitives, header, footer */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--wide { max-width: var(--container-wide); }
.container--narrow { max-width: 760px; }

/* vertical rhythm primitive */
.stack > * + * { margin-block-start: var(--flow, 1.25em); }
.stack--sm { --flow: .75em; }
.stack--lg { --flow: 1.75em; }

/* wrapping inline group */
.cluster {
  display: flex;
  flex-wrap: wrap;
  gap: var(--cluster-gap, 1rem);
  align-items: center;
}

/* intrinsic responsive grid */
.grid-auto {
  display: grid;
  gap: var(--grid-gap, var(--sp-md));
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
}

/* section spacing */
.section { padding-block: var(--sp-2xl); }
.section--tight { padding-block: var(--sp-xl); }
.section--flush-top { padding-block-start: 0; }

/* full-bleed band — scrollbar-safe */
.bleed {
  width: 100%;
  margin-inline: calc(50% - 50vw);
  max-width: 100vw;
}

/* dark band */
.band-dark {
  background: var(--c-dark);
  color: var(--c-cream);
  position: relative;
}
.band-dark :is(h1,h2,h3,h4) { color: var(--c-cream); }
.band-dark .text-muted { color: var(--c-cream-soft); }
.band-muted { background: var(--c-surface-2); }

/* film-grain texture overlay for dark bands */
.grain::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .5;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0naHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmcnIHdpZHRoPScxNjAnIGhlaWdodD0nMTYwJz48ZmlsdGVyIGlkPSduJz48ZmVUdXJidWxlbmNlIHR5cGU9J2ZyYWN0YWxOb2lzZScgYmFzZUZyZXF1ZW5jeT0nMC45JyBudW1PY3RhdmVzPScyJyBzdGl0Y2hUaWxlcz0nc3RpdGNoJy8+PGZlQ29sb3JNYXRyaXggdHlwZT0nc2F0dXJhdGUnIHZhbHVlcz0nMCcvPjwvZmlsdGVyPjxyZWN0IHdpZHRoPScxMDAlJyBoZWlnaHQ9JzEwMCUnIGZpbHRlcj0ndXJsKCNuKScgb3BhY2l0eT0nMC41NScvPjwvc3ZnPg==");
}

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  /* No backdrop-filter: a filtered header becomes the containing block for its
     position:fixed mobile nav, which collapses the menu. Use a near-opaque bg instead. */
  background: color-mix(in srgb, var(--c-bg) 95%, transparent);
  border-bottom: var(--bw) solid transparent;
  transition: border-color var(--dur-2) var(--ease-out), background var(--dur-2) var(--ease-out);
}
.site-header.is-scrolled {
  background: var(--c-bg);
  border-bottom-color: var(--c-line);
  box-shadow: var(--shadow-1);
}
.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-md);
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  flex-shrink: 0;
}
.brand__mark { width: 38px; height: 38px; color: var(--c-brand); flex: none; }
.brand__word {
  font-family: var(--ff-display);
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--c-ink);
  line-height: 1;
}
.brand__sub {
  display: block;
  font-family: var(--ff-mono);
  font-size: .56rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--c-muted);
  margin-top: .25rem;
}

/* primary nav */
.nav { display: flex; align-items: center; gap: var(--sp-lg); }
.nav__list {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2rem);
  list-style: none;
  margin: 0; padding: 0;
}
.nav__link {
  position: relative;
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: .01em;
  color: var(--c-ink-soft);
  padding-block: .4rem;
  transition: color var(--dur-1) var(--ease-out);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 2px;
  background: var(--c-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-2) var(--ease-out);
}
.nav__link:hover { color: var(--c-ink); }
.nav__link:hover::after,
.nav__link[aria-current="page"]::after { transform: scaleX(1); }
.nav__link[aria-current="page"] { color: var(--c-ink); }

.nav-toggle { display: none; }

@media (max-width: 860px) {
  .nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(86vw, 360px);
    background: var(--c-dark);
    color: var(--c-cream);
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: calc(var(--header-h) + 1.5rem) var(--gutter) 2rem;
    transform: translateX(100%);
    transition: transform var(--dur-3) var(--ease-out);
    box-shadow: var(--shadow-3);
    overflow-y: auto;
  }
  .nav.is-open { transform: translateX(0); }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__link {
    color: var(--c-cream);
    font-size: var(--step-1);
    font-family: var(--ff-display);
    padding-block: .9rem;
    border-bottom: 1px solid var(--c-dark-line);
  }
  .nav__link::after { display: none; }
  .nav__link[aria-current="page"] { color: var(--c-accent); }
  .nav .btn { margin-top: 1.25rem; justify-content: center; }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px; height: 46px;
    margin-right: -8px;
    z-index: 110;
    color: var(--c-ink);
  }
  .nav-toggle__box { width: 24px; height: 14px; position: relative; }
  .nav-toggle__box span {
    position: absolute; left: 0; height: 2px; width: 100%;
    background: currentColor; border-radius: 2px;
    transition: transform var(--dur-2) var(--ease-out), opacity var(--dur-1) var(--ease-out), top var(--dur-2) var(--ease-out);
  }
  .nav-toggle__box span:nth-child(1) { top: 0; }
  .nav-toggle__box span:nth-child(2) { top: 6px; }
  .nav-toggle__box span:nth-child(3) { top: 12px; }
  .nav-toggle[aria-expanded="true"] { color: var(--c-cream); position: fixed; right: var(--gutter); top: 15px; }
  .nav-toggle[aria-expanded="true"] .nav-toggle__box span:nth-child(1) { top: 6px; transform: rotate(45deg); }
  .nav-toggle[aria-expanded="true"] .nav-toggle__box span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] .nav-toggle__box span:nth-child(3) { top: 6px; transform: rotate(-45deg); }

  .nav-backdrop {
    position: fixed; inset: 0;
    background: rgba(22,19,15,.5);
    opacity: 0; visibility: hidden;
    transition: opacity var(--dur-2) var(--ease-out), visibility var(--dur-2);
    z-index: 99;
  }
  .nav-backdrop.is-open { opacity: 1; visibility: visible; }
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: var(--c-dark);
  color: var(--c-cream-soft);
  padding-block: var(--sp-2xl) var(--sp-lg);
  position: relative;
}
.site-footer__grid {
  display: grid;
  gap: var(--sp-xl) var(--sp-lg);
  grid-template-columns: 1.4fr 1fr 1fr;
  align-items: start;
}
.site-footer h3 {
  color: var(--c-cream);
  font-family: var(--ff-mono);
  font-size: var(--step--1);
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  margin-bottom: 1.1rem;
}
.site-footer a { color: var(--c-cream-soft); transition: color var(--dur-1) var(--ease-out); }
.site-footer a:hover { color: var(--c-accent); }
.site-footer .brand__word { color: var(--c-cream); }
.site-footer .brand__mark { color: var(--c-brand-300); }
.footer-nav { display: flex; flex-direction: column; gap: .6rem; }
.footer-contact { font-style: normal; line-height: 1.8; }
.footer-bottom {
  margin-top: var(--sp-xl);
  padding-top: var(--sp-md);
  border-top: 1px solid var(--c-dark-line);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-sm) var(--sp-md);
  justify-content: space-between;
  align-items: center;
  font-size: var(--step--1);
}
.footer-bottom__links { display: flex; gap: var(--sp-md); flex-wrap: wrap; }
.footer-cookie {
  font-size: var(--step--2);
  color: var(--c-cream-soft);
  opacity: .8;
  max-width: 60ch;
  margin-top: .75rem;
}

@media (max-width: 760px) {
  .site-footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .site-footer__grid { grid-template-columns: 1fr; }
}