/* Structural layout: nav shell and footer. */

.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: transparent;
  transform: translateY(0);
  transition:
    background 0.4s var(--ease-gallery),
    border-color 0.4s var(--ease-gallery),
    transform 0.5s var(--ease-gallery);
  border-bottom: 1px solid transparent;
  will-change: transform;
}

.site-nav.is-scrolled {
  background: rgba(18, 17, 16, 0.88);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--color-border);
}

.site-nav.is-hidden {
  transform: translateY(-100%);
}

@media (prefers-reduced-motion: reduce) {
  .site-nav {
    transition: background 0.4s var(--ease-gallery), border-color 0.4s var(--ease-gallery);
  }
  .site-nav.is-hidden {
    transform: none;
  }
}

.site-nav__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1.35rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-nav__mark {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.02em;
  display: inline-flex;
  gap: 0.15em;
}

.site-nav__mark-line--accent {
  color: var(--color-accent);
  font-style: italic;
}

.site-nav__links {
  display: flex;
  gap: 2.25rem;
}

.site-nav__links a {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-dim);
  transition: color 0.25s ease;
  position: relative;
  padding-bottom: 0.3rem;
}

.site-nav__links a::after {
  content: '';
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--color-accent);
  transition: right 0.3s var(--ease-gallery);
}

.site-nav__links a:hover {
  color: var(--color-text);
}

.site-nav__links a:hover::after {
  right: 0;
}

.site-nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  padding: 0;
}

.site-nav__toggle span {
  display: block;
  height: 1px;
  background: var(--color-text);
}

.site-nav__mobile {
  display: none;
  flex-direction: column;
  padding: 0 var(--gutter) 1.5rem;
  gap: 1rem;
}

.site-nav__mobile a {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-dim);
}

@media (max-width: 760px) {
  .site-nav__links {
    display: none;
  }
  .site-nav__toggle {
    display: flex;
  }
  .site-nav.is-open {
    background: rgba(18, 17, 16, 0.97);
    border-bottom-color: var(--color-border);
  }
  .site-nav__mobile.is-open {
    display: flex;
  }
}

/* Footer */

.site-footer {
  border-top: 1px solid var(--color-border);
  background: var(--color-wall);
  margin-top: clamp(4rem, 10vw, 8rem);
}

.site-footer__inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) var(--gutter);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
}

.site-footer__heading {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  margin-bottom: 0.9rem;
}

.site-footer__block p {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  margin-bottom: 0.6rem;
}

.site-footer__block a {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border-strong);
}

.site-footer__meta {
  font-size: 0.8rem;
  color: var(--color-text-faint);
}

.footer-signup {
  display: flex;
  gap: 0.5rem;
  margin-top: 1rem;
}

.footer-signup__input {
  flex: 1;
  background: transparent;
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  padding: 0.7rem 0.9rem;
  font-family: var(--font-ui);
  font-size: 0.85rem;
}

.footer-signup__input:focus {
  outline: none;
  border-color: var(--color-accent);
}

.footer-signup__submit {
  background: transparent;
  border: 1px solid var(--color-accent-dim);
  color: var(--color-accent);
  padding: 0.7rem 1.1rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: background 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}

.footer-signup__submit:hover {
  background: var(--color-accent);
  color: var(--color-bg);
}

.footer-signup__status {
  margin-top: 0.6rem;
  font-size: 0.78rem;
  color: var(--color-accent);
}

@media (max-width: 800px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}