.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section {
  padding-block: var(--space-2xl);
  position: relative;
}
.section--tight { padding-block: var(--space-xl); }
.section--surface { background: var(--color-surface); }

.stack { display: flex; flex-direction: column; }
.row { display: flex; flex-wrap: wrap; align-items: center; }

.grid {
  display: grid;
  gap: var(--space-md);
}
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 900px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid--3, .grid--2 { grid-template-columns: 1fr; }
}

/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: rgba(10, 10, 10, 0.78);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--ease-standard) 0.2s;
}

.logo-lockup {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-inverse);
}
.logo-lockup__mark {
  height: 52px;
  width: auto;
  display: block;
  object-fit: contain;
}
.logo-lockup__title, .logo-lockup__subtitle { font-family: var(--font-ui); }

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

.nav__list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-md);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.nav__list a {
  color: var(--color-text);
  position: relative;
  padding-bottom: 4px;
}
.nav__list a:hover,
.nav__list a[aria-current="page"] {
  color: var(--color-accent-yellow);
}
.nav__list a[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--color-accent-red);
}

.nav__toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-inverse);
  padding: 0.4rem 0.6rem;
  font-size: 1.3rem;
  cursor: pointer;
}

@media (max-width: 860px) {
  .nav__toggle { display: inline-flex; }
  .nav__list {
    position: fixed;
    top: 84px; left: 0; right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    gap: var(--space-sm);
    transform: translateY(-110%);
    transition: transform 0.25s var(--ease-standard);
  }
  .nav__list.is-open { transform: translateY(0); }
}

/* Footer */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-xl) var(--space-lg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: var(--space-lg);
}

@media (max-width: 700px) {
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-md); }
}

.footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer__list a { color: var(--color-text-muted); }
.footer__list a:hover { color: var(--color-accent-yellow); }

.footer__bottom {
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* spacer so fixed header doesn't cover content */
main { display: block; }
.page-offset { padding-top: 84px; }