/* ── HEADER ───────────────────────────────────── */

#siteHeader {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%) translateY(-130%);
  width: calc(100% - 1.5rem);
  max-width: 1100px;
  border-radius: var(--radius-xl);
  background: rgba(1,13,91,0.58);
  backdrop-filter: blur(22px) saturate(180%);
  border: 1px solid rgba(255,176,0,0.15);
  box-shadow: 0 8px 40px rgba(0,0,0,0.4);
  padding: 0.4rem 0.85rem;
  z-index: var(--z-header);
  transition: transform 0.45s cubic-bezier(0.4,0,0.2,1);
}

#siteHeader.is-visible {
  transform: translateX(-50%) translateY(0);
  top: 0.6rem;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  justify-content: space-between;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-left: auto;
}

/* Logo */
.logo {
  display: inline-flex;
  align-items: center;
  height: 28px;
}

.logo img {
  height: 100%;
  width: auto;
  object-fit: contain;
}

/* Nav */
.header-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: auto;
}

.nav-link {
  font-family: 'Syne', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--color-text);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-full);
  transition: 0.2s;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background: rgba(255,255,255,0.07);
}

.header-cta {
  margin-left: var(--space-sm);
}

/* ── HAMBURGER ───────────────── */

.hamburger {
  width: 40px;
  height: 40px;
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.hamburger span {
  width: 22px;
  height: 2px;
  background: white;
  transition: 0.3s;
}

.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── MOBILE MENU ───────────────── */

.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3,13,62,0.75);
  backdrop-filter: blur(4px);
  z-index: var(--z-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: 0.3s;
}

.nav-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  inset: 0;
  background: rgba(1,13,91,0.98);
  z-index: var(--z-drawer);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-md);
  opacity: 0;
  transform: scale(0.95);
  transition: 0.3s;
  visibility: hidden;
}

.mobile-drawer.open {
  opacity: 1;
  transform: scale(1);
  visibility: visible;
}

.drawer-link {
  font-size: 2rem;
  color: var(--color-text);
}

.drawer-link:hover {
  color: var(--color-accent);
}