/* Shared shell: skip link, header, drawer, footer */
site-header, site-footer { display: block; }

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: calc(-1 * var(--space-9));
  z-index: 50;
  padding: var(--space-3) var(--space-4);
  background: var(--color-text);
  color: var(--color-bg);
  text-decoration: none;
}
.skip-link:focus { top: var(--space-4); }

/* Header */
.site-header { position: relative; z-index: 30; }
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  min-height: var(--header-h);
}
.site-header__brand {
  display: flex;
  align-items: baseline;
  gap: var(--space-4);
  text-decoration: none;
}
.site-header__mark {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  line-height: 1;
}
.site-header__sub { color: var(--color-text-muted); }
.site-nav__list { display: flex; gap: var(--space-7); }
.site-nav__list a {
  display: inline-block;
  padding-block: var(--space-3);
  position: relative;
}
.site-nav__list a[aria-current="page"] { text-decoration: underline; text-decoration-color: var(--color-text); text-underline-offset: 0.6em; text-decoration-thickness: 1px; }
.site-header__toggle {
  display: none;
  align-items: center;
  gap: var(--space-3);
  min-height: 2.75rem;
  padding: 0 var(--space-2);
  background: none;
  border: 0;
  cursor: pointer;
}
.site-header__toggle-bolt {
  width: 1.5rem;
  height: var(--space-2);
  border-block: 1px solid var(--color-text);
}
[aria-expanded="true"] .site-header__toggle-bolt { border-color: var(--color-accent); }

/* Drawer (phone) */
.site-drawer {
  position: fixed;
  inset: 0;
  z-index: -1;
  padding: calc(var(--header-h) + var(--space-7)) var(--gutter) var(--space-7);
  background: var(--color-bg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
}
.site-drawer[hidden] { display: none; }
.site-drawer__list { display: grid; gap: var(--space-2); }
.site-drawer__list a {
  display: flex;
  align-items: baseline;
  gap: var(--space-5);
  padding-block: var(--space-3);
  border-bottom: var(--rule);
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  line-height: 1.1;
}
.site-drawer__num { font-size: var(--fs-label); width: 2.5em; }
.site-drawer__list a[aria-current="page"] { color: var(--color-accent); }

/* Footer: one ruled line of facts */
.site-footer {
  margin-top: var(--section-pad);
  border-top: var(--rule);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
  align-items: baseline;
  padding-block: var(--space-6);
}
.site-footer__mark {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}
.site-footer__mark .t-caption { text-transform: none; letter-spacing: 0; white-space: nowrap; }
.site-footer__demo { padding-block: 0 var(--space-6); }

@media (max-width: 1199px) {
  .site-nav__list { gap: var(--space-6); }
  .site-header__sub { display: none; }
  .site-footer__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 809px) {
  .site-nav { display: none; }
  .site-header__toggle { display: inline-flex; }
  .site-footer__inner { grid-template-columns: minmax(0, 1fr); gap: var(--space-2); }
}