/* =========================================================
   navbar.css — Fixed navigation bar
   ========================================================= */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: transparent;
  transition:
    background  350ms var(--ease-smooth),
    box-shadow  350ms var(--ease-smooth),
    border-color 350ms var(--ease-smooth);
  border-bottom: 1px solid transparent;
}

/* Scrolled state — added by JS */
.navbar--scrolled {
  background: var(--bg-overlay);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom-color: var(--border-subtle);
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.5);
}

.navbar__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* ── Logo ── */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  transition: opacity 200ms;
}

.navbar__logo:hover {
  opacity: 0.85;
}

.navbar__logo-svg {
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(243, 199, 72, 0.25));
  transition: filter 200ms;
}

.navbar__logo:hover .navbar__logo-svg {
  filter: drop-shadow(0 0 14px rgba(243, 199, 72, 0.45));
}

.navbar__logo-text {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  background: var(--gradient-brand-text);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ── Desktop links ── */
.navbar__links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.navbar__link {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding-bottom: 2px;
  transition: color 220ms;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  right: 50%;
  height: 1.5px;
  background: var(--gradient-brand-text);
  border-radius: 2px;
  transition: left 250ms var(--ease-out), right 250ms var(--ease-out);
}

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

.navbar__link:hover::after,
.navbar__link--active::after {
  left: 0;
  right: 0;
}

/* ── Hamburger toggle ── */
.navbar__toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: var(--r-sm);
  transition: background 200ms;
}

.navbar__toggle:hover {
  background: rgba(255, 255, 255, 0.06);
}

.navbar__hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 22px;
}

.navbar__hamburger span {
  display: block;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transform-origin: center;
  transition:
    transform 280ms var(--ease-out),
    opacity 200ms,
    width 250ms var(--ease-out);
}

.navbar__hamburger span:last-child {
  width: 14px;
}

/* Active (X) state */
.navbar--menu-open .navbar__hamburger span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.navbar--menu-open .navbar__hamburger span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.navbar--menu-open .navbar__hamburger span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
  width: 22px;
}

/* ── Mobile menu overlay ── */
/* Lives OUTSIDE <nav> so backdrop-filter on the navbar bar
   never traps this element's fixed-position containing block. */
.navbar__mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  padding-top: var(--nav-h);
  background: rgba(6, 6, 10, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2.5rem;
  z-index: 999;
  /* visibility keeps it fully inert when closed;
     opacity provides the smooth fade animation */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity     300ms var(--ease-out),
    visibility  300ms;
}

/* Opened by JS adding .is-open directly on the element */
.navbar__mobile-menu.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.navbar__mobile-link {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: -0.02em;
  transition: color 200ms, transform 200ms;
}

.navbar__mobile-link:hover {
  color: var(--gold);
  transform: translateX(6px);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .navbar__links {
    display: none;
  }

  .navbar__toggle {
    display: flex;
  }
}

@media (min-width: 769px) {
  .navbar__mobile-menu {
    display: none !important;
  }
}