/* ============================================================
   layout.css — Nav, footer, and shared page-level structure.
   Imported by every page after base.css.
   ============================================================ */

/* ── Nav ───────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  /* Starts transparent, JS adds .nav--scrolled */
  background: transparent;
  transition: background var(--t-slow), border-color var(--t-slow),
              backdrop-filter var(--t-slow);
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

/* Logo */
.nav__logo {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--text-primary);
  transition: color var(--t-fast);
}

.nav__logo span {
  color: var(--gold);
}

.nav__logo:hover {
  color: var(--gold);
}

/* Links */
.nav__links {
  display: flex;
  align-items: center;
  gap: var(--sp-8);
}

.nav__link {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  transition: color var(--t-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width var(--t-base);
}

.nav__link:hover,
.nav__link--active {
  color: var(--text-primary);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-secondary);
  transition: all var(--t-base);
}

/* Mobile nav drawer */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: rgba(10, 10, 10, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: var(--sp-6);
  flex-direction: column;
  gap: var(--sp-4);
  z-index: 99;
  transform: translateY(-8px);
  opacity: 0;
  transition: transform var(--t-base), opacity var(--t-base);
}

.nav__mobile.open {
  transform: translateY(0);
  opacity: 1;
}

.nav__mobile .nav__link {
  font-size: var(--text-base);
  padding-block: var(--sp-2);
}

@media (max-width: 640px) {
  .nav__links  { display: none; }
  .nav__toggle { display: flex; }
  .nav__mobile { display: flex; }
}

/* ── Footer ────────────────────────────────────────────────── */
.footer {
  border-top: 1px solid var(--border);
  padding-block: var(--sp-10);
  margin-top: var(--sp-24);
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-4);
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--sp-6);
}

.footer__name {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.footer__name span {
  color: var(--gold);
}

.footer__links {
  display: flex;
  gap: var(--sp-6);
}

.footer__link {
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color var(--t-fast);
}

.footer__link:hover {
  color: var(--text-secondary);
}

@media (max-width: 640px) {
  .footer__inner { flex-direction: column; align-items: flex-start; }
}