/* ==========================================================================
   A. Woods — layout.css
   Header/nav, footer, and page-level grid scaffolding.
   ========================================================================== */

/* ---- Site header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  border-bottom: var(--border-w) solid var(--accent);
}

.site-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-2);
  gap: var(--space-3);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-head);
  color: var(--text-on-ink);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.brand__mark {
  color: var(--accent-light);
}

.brand__tag {
  display: none;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--text-on-ink-muted);
  text-transform: uppercase;
}

@media (min-width: 640px) {
  .brand__tag {
    display: inline;
  }
}

.nav-toggle {
  background: transparent;
  border: var(--border-w) solid var(--line-dark);
  color: var(--text-on-ink);
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: "";
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
}

.nav-toggle__icon::before {
  position: absolute;
  top: -6px;
}

.nav-toggle__icon::after {
  position: absolute;
  top: 6px;
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }
}

.site-nav {
  display: none;
  flex-direction: column;
  border-top: 1px solid var(--line-dark);
}

.site-nav.is-open {
  display: flex;
}

.site-nav__list {
  display: flex;
  flex-direction: column;
}

.site-nav__link {
  display: block;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-on-ink-muted);
  border-bottom: 1px solid var(--line-dark);
}

.site-nav__link:hover,
.site-nav__link:focus-visible,
.site-nav__link[aria-current="page"] {
  color: var(--text-on-ink);
  background: var(--ink-soft);
}

.site-nav__cta {
  margin: var(--space-2) var(--space-3);
}

@media (min-width: 900px) {
  .site-nav {
    display: flex;
    flex-direction: row;
    align-items: center;
    border-top: none;
    gap: var(--space-4);
  }

  .site-nav__list {
    flex-direction: row;
    gap: var(--space-2);
  }

  .site-nav__link {
    border-bottom: none;
    padding: var(--space-1) 0;
    position: relative;
  }

  .site-nav__link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    height: var(--border-w);
    width: 0;
    background: var(--accent);
    transition: width 0.15s ease-out;
  }

  .site-nav__link:hover::after,
  .site-nav__link:focus-visible::after,
  .site-nav__link[aria-current="page"]::after {
    width: 100%;
  }

  .site-nav__link:hover,
  .site-nav__link:focus-visible,
  .site-nav__link[aria-current="page"] {
    background: transparent;
  }

  .site-nav__cta {
    margin: 0;
  }
}

/* ---- Footer ---- */
.site-footer {
  background: var(--ink);
  color: var(--text-on-ink-muted);
  border-top: var(--border-w) solid var(--accent);
}

.site-footer__grid {
  display: grid;
  gap: var(--space-4);
  padding-block: var(--space-5);
}

@media (min-width: 700px) {
  .site-footer__grid {
    grid-template-columns: 1.2fr 1fr 1fr;
  }
}

.site-footer h3 {
  color: var(--text-on-ink);
  font-size: 1rem;
  margin-bottom: var(--space-2);
}

.site-footer p,
.site-footer li {
  font-size: 0.92rem;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--accent-light);
}

.site-footer__bottom {
  border-top: 1px solid var(--line-dark);
  padding-block: var(--space-2);
  font-size: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: space-between;
}

/* ---- Grid scaffolding ---- */
.grid {
  display: grid;
  gap: var(--space-4);
}

.grid--2 {
  grid-template-columns: 1fr;
}

.grid--3 {
  grid-template-columns: 1fr;
}

.grid--4 {
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 960px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

.split {
  display: grid;
  gap: var(--space-4);
  align-items: center;
}

@media (min-width: 860px) {
  .split {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--space-6);
  }
  .split--reverse {
    grid-template-columns: 0.95fr 1.05fr;
  }
  .split--reverse > *:first-child {
    order: 2;
  }
}