/* ═══════════════════════════════════════════════════════════════════
   NAV — fixed, transparent → scrolled blur
   NOTE: .nav-overlay is a SIBLING of <nav>, not a child.
         This keeps position:fixed unaffected by backdrop-filter's
         stacking-context side-effect.
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Shell ───────────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 76px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition:
    background-color 0.3s ease,
    border-color     0.3s ease;
}

.nav.scrolled {
  background: rgba(8, 8, 8, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: rgba(255, 255, 255, 0.07);
}

/* ─── Inner layout ────────────────────────────────────────────────── */
.nav__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;        /* anchor for absolute-centred links */
}

/* ─── Logo ────────────────────────────────────────────────────────── */
.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
  z-index: 1;
}

.nav__logo-brs {
  font-family: var(--font-display);
  font-size: 2.2rem;
  color: var(--accent);
  line-height: 1;
  letter-spacing: 0.02em;
}

.nav__logo-sep {
  width: 1px;
  height: 28px;
  background: rgba(255, 255, 255, 0.12);
  flex-shrink: 0;
}

.nav__logo-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--text);
  letter-spacing: 0.08em;
  line-height: 1.25;
}

/* ─── Centre links (absolutely centred) ──────────────────────────── */
.nav__links {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__link {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(242, 237, 232, 0.55);
  text-decoration: none;
  position: relative;
  padding-bottom: 3px;
  transition: color 0.2s ease;
}

/* animated underline */
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.25s ease;
}

.nav__link:hover        { color: var(--text); }
.nav__link:hover::after { width: 100%; }

/* active page */
.nav__link.active {
  color: var(--accent);
}
.nav__link.active::after { width: 100%; }

/* ─── Right actions ───────────────────────────────────────────────── */
.nav__actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
  z-index: 1;
}

/* ─── Hamburger ───────────────────────────────────────────────────── */
.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__burger span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease;
}

.nav__burger span:nth-child(1) { width: 22px; }
.nav__burger span:nth-child(2) { width: 14px; }
.nav__burger span:nth-child(3) { width: 22px; }

/* ×-state while overlay is open */
.nav__burger.active span:nth-child(1) { width: 22px; transform: translateY(7px) rotate(45deg); }
.nav__burger.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__burger.active span:nth-child(3) { width: 22px; transform: translateY(-7px) rotate(-45deg); }

/* ─── Fullscreen mobile overlay ───────────────────────────────────── */
/* Placed as a SIBLING of <nav> in HTML — see nav.html snippet */
.nav-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;                  /* above .nav z-index:100 */
  background: #080808;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px 48px;
  gap: 0;

  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.nav-overlay.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* Close × button */
.nav-overlay__close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.nav-overlay__close:hover {
  border-color: var(--accent);
  background: var(--accent-dim);
}

/* CSS × icon */
.nav-overlay__close-icon {
  position: relative;
  width: 16px;
  height: 16px;
}

.nav-overlay__close-icon::before,
.nav-overlay__close-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  background: rgba(242, 237, 232, 0.7);
  border-radius: 2px;
  transition: background-color 0.2s ease;
}

.nav-overlay__close-icon::before { transform: rotate(45deg); }
.nav-overlay__close-icon::after  { transform: rotate(-45deg); }

.nav-overlay__close:hover .nav-overlay__close-icon::before,
.nav-overlay__close:hover .nav-overlay__close-icon::after {
  background: var(--accent);
}

/* Big Bebas Neue link list */
.nav-overlay__links {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2px;
  margin-bottom: 40px;
}

.nav-overlay__link {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 10vw, 5rem);
  color: rgba(242, 237, 232, 0.25);
  text-decoration: none;
  letter-spacing: 0.04em;
  line-height: 1.15;

  /* enter animation (staggered) */
  opacity: 0;
  transform: translateY(18px);
  transition:
    color     0.2s  ease,
    opacity   0.4s  ease,
    transform 0.4s  ease;
}

.nav-overlay__link:hover,
.nav-overlay__link.active {
  color: var(--accent);
}

/* Staggered enter when overlay opens */
.nav-overlay.open .nav-overlay__link          { opacity: 1; transform: translateY(0); }
.nav-overlay.open .nav-overlay__link:nth-child(1) { transition-delay: 0.06s; }
.nav-overlay.open .nav-overlay__link:nth-child(2) { transition-delay: 0.12s; }
.nav-overlay.open .nav-overlay__link:nth-child(3) { transition-delay: 0.18s; }
.nav-overlay.open .nav-overlay__link:nth-child(4) { transition-delay: 0.24s; }
.nav-overlay.open .nav-overlay__link:nth-child(5) { transition-delay: 0.30s; }
.nav-overlay.open .nav-overlay__link:nth-child(6) { transition-delay: 0.36s; }

/* CTA inside overlay */
.nav-overlay__cta {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease 0.42s, transform 0.4s ease 0.42s;
}

.nav-overlay.open .nav-overlay__cta {
  opacity: 1;
  transform: translateY(0);
}

/* Decorative large background BRS text */
.nav-overlay__bg {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-size: clamp(8rem, 30vw, 18rem);
  color: rgba(255, 85, 0, 0.03);
  letter-spacing: 0.04em;
  white-space: nowrap;
  pointer-events: none;
  user-select: none;
  line-height: 1;
}

/* ─── Responsive breakpoint ───────────────────────────────────────── */
@media (max-width: 900px) {
  .nav__links             { display: none; }
  .nav__actions .btn      { display: none; }
  .nav__burger            { display: flex; }
}

@media (max-width: 400px) {
  .nav__logo-sep,
  .nav__logo-name { display: none; }
}