/* ── Site Navigation ──────────────────────────────────────── */
.site-nav {
  position: fixed;
  top: 24px;
  left: 24px;
  z-index: 200;
}

.site-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--bg-dark);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  color: var(--neutral-200);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: background 0.2s ease, color 0.2s ease;
  position: relative;
  z-index: 201;
}

.site-nav-toggle:hover {
  background: var(--bg-extra-light);
  color: var(--neutral-100);
}

.site-nav-hamburger {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.site-nav-hamburger span {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
  transform-origin: center;
}

/* X state when open */
.site-nav-toggle[aria-expanded="true"] .site-nav-hamburger span:nth-child(1) {
  transform: translateY(3px) rotate(45deg);
}
.site-nav-toggle[aria-expanded="true"] .site-nav-hamburger span:nth-child(2) {
  transform: translateY(-3px) rotate(-45deg);
}

/* ── Fullscreen Overlay ────────────────────────────────────── */
.site-nav-menu {
  position: fixed;
  inset: 0;
  background: var(--bg-dark);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: flex-start;
  padding: 64px 24px 24px 32px;
  gap: 4px;
  opacity: 0;
  pointer-events: none;
  transform: scale(0.98);
  visibility: hidden;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s 0.2s;
  z-index: 200;
}

.site-nav-menu.open {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
  visibility: visible;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s 0s;
}

/* ── Items ────────────────────────────────────────────────── */
.site-nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px 6px 0;
  border-radius: 4px;
  font-family: var(--sans);
  font-size: var(--type-m-size);
  font-weight: var(--regular);
  color: var(--neutral-300);
  text-decoration: none;
  transition: color 0.3s ease, padding-left 0.3s ease;
}

.site-nav-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 20px;
  height: 2px;
  background: var(--neutral-100);
  transform: translateY(-50%) scaleX(0);
  transform-origin: left center;
  opacity: 0;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.site-nav-item:hover {
  color: var(--neutral-100);
  padding-left: 32px;
}

.site-nav-item:hover::before {
  transform: translateY(-50%) scaleX(1);
  opacity: 1;
}

.site-nav-item.active {
  color: var(--neutral-100);
}