.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  color: var(--white);
  transition: box-shadow .25s ease, transform .25s ease;
}

.site-header.scrolled { box-shadow: 0 10px 35px rgba(4, 13, 24, .16); }

.site-header .topbar {
  background: #030914;
  font-size: 12px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.site-header .topbar-inner {
  min-height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.site-header .topbar p { margin: 0; color: #b9c7d7; }
.site-header .topbar-links { display: flex; align-items: center; gap: 10px; color: #dfe8f2; }
.site-header .topbar-links a:hover { color: var(--cyan); }

.site-header .nav-wrap {
  background: rgba(7, 17, 31, .9);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,.09);
}

.site-header .nav-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.site-header .brand { display: inline-flex; align-items: center; flex-shrink: 0; }
.site-header .brand img { width: 150px; height: auto; }
.site-header .brand-text { display: flex; align-items: center; }
.site-header .primary-nav { min-width: 0; display: flex; flex: 1; align-items: center; justify-content: flex-end; gap: 28px; }
.site-header .nav-list { min-width: 0; display: flex; align-items: center; justify-content: flex-end; gap: 4px; list-style: none; margin: 0; padding: 0; }

.site-header .nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 29px 13px;
  color: #e8eef5;
  font-size: 14px;
  font-weight: 500;
  border: 0;
  background: transparent;
  cursor: pointer;
  position: relative;
}

.site-header .nav-link::after {
  content: "";
  position: absolute;
  left: 13px;
  right: 13px;
  bottom: 18px;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .22s ease;
}

.site-header .nav-link:hover::after,
.site-header .nav-link:focus-visible::after,
.site-header .has-mega.open > .nav-link::after { transform: scaleX(1); }
.site-header .nav-button svg { width: 15px; fill: none; stroke: currentColor; stroke-width: 1.8; transition: transform .2s; }
.site-header .has-mega.open .nav-button svg { transform: rotate(180deg); }

.site-header .nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 17px;
  border: 1px solid rgba(255,255,255,.38);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  transition: background .2s, color .2s, border .2s;
}

.site-header .nav-cta:hover { background: var(--white); color: var(--navy-900); border-color: var(--white); }
.site-header .has-mega { position: static; }

.site-header .mega-menu {
  position: absolute;
  top: 112px;
  left: 50%;
  width: min(calc(100% - 40px), var(--container));
  transform: translate(-50%, 12px);
  display: grid;
  grid-template-columns: .9fr 2fr;
  gap: 46px;
  padding: 38px;
  color: var(--ink);
  background: var(--white);
  box-shadow: var(--shadow);
  border-radius: 0 0 18px 18px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
}

.site-header .has-mega.open .mega-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.site-header .mega-menu.compact { grid-template-columns: .9fr 1.5fr; }
.site-header .mega-intro h3 { margin: 12px 0; font: 700 27px/1.2 Manrope, sans-serif; letter-spacing: -.03em; }
.site-header .mega-intro p { margin: 0 0 20px; color: var(--muted); line-height: 1.7; }
.site-header .mega-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 22px; }
.site-header .mega-grid a { padding: 14px 12px; border-radius: 12px; transition: background .2s, transform .2s; }
.site-header .mega-grid a:hover { background: var(--surface); transform: translateX(2px); }
.site-header .mega-grid strong { display: block; font: 700 15px/1.2 Manrope, sans-serif; margin-bottom: 7px; }
.site-header .mega-grid span { display: block; color: var(--muted); font-size: 12px; line-height: 1.55; }

.site-header .menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 10px;
  background: rgba(255,255,255,.05);
  padding: 11px 9px;
  cursor: pointer;
}

.site-header .menu-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--white);
  transition: transform .2s, opacity .2s;
}

@media (min-width: 821px) and (max-width: 1280px) {
  .site-header .nav-inner { gap: 16px; }
  .site-header .brand img { width: 135px; }
  .site-header .primary-nav { gap: 12px; }
  .site-header .nav-list { gap: 0; }
  .site-header .nav-link { padding-inline: 8px; font-size: 13px; }
  .site-header .nav-cta { padding: 11px 13px; font-size: 12px; white-space: nowrap; }
}

@media (max-width: 820px) {

  .site-header .topbar { display: block; }
  .site-header .topbar-inner { min-height: 34px; gap: 12px; }
  .site-header .topbar p,
  .site-header .topbar-links { white-space: nowrap; }
  .site-header .nav-inner { min-height: 72px; }
  .site-header .menu-toggle { display: block; position: relative; z-index: 2; }
  .site-header .menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-header .menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .site-header .menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .site-header .primary-nav {
    position: absolute;
    top: 100%;
    right: 0;
    bottom: auto;
    left: auto;
    width: min(88vw, 420px);
    height: calc(100dvh - 106px);
    display: block;
    padding: 18px 22px 40px;
    background: rgba(7,17,31,.98);
    border-left: 1px solid rgba(255,255,255,.1);
    box-shadow: -24px 20px 60px rgba(0,0,0,.35);
    transform: translateX(105%);
    visibility: hidden;
    transition: transform .25s ease, visibility .25s;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: rgba(132,217,255,.5) transparent;
  }

  .site-header .primary-nav.open { transform: translateX(0); visibility: visible; }
  .site-header .nav-list { display: block; }
  .site-header .nav-list > li { width: 100%; }
  .site-header .has-mega { position: relative; }
  .site-header .nav-link { width: 100%; justify-content: space-between; padding: 17px 4px; border-bottom: 1px solid rgba(255,255,255,.1); font-size: 16px; text-align: left; }
  .site-header .nav-link::after { display: none; }
  .site-header .nav-cta { width: 100%; margin-top: 24px; padding: 14px 18px; }

  .site-header .mega-menu,
  .site-header .mega-menu.compact {

    position: static;
    width: 100%;
    transform: none;
    display: none;
    grid-template-columns: 1fr;
    gap: 18px;
    margin: 0;
    padding: 20px 12px;
    border-radius: 0 0 12px 12px;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    background: rgba(255,255,255,.045);
    color: var(--white);
  }

  .site-header .has-mega.open > .mega-menu { display: grid; transform: none; }
  .site-header .mega-intro p,
  .site-header .mega-grid span { color: #a8b8c8; }
  .site-header .mega-grid { grid-template-columns: 1fr; }
  .site-header .mega-grid a { padding-inline: 4px; }
}

@media (max-width: 760px) {
  .site-header .brand img { width: 138px; }
  .site-header .primary-nav { width: 100%; border-left: 0; padding-inline: 20px; }
  .site-header .mega-grid a:hover {
    background: rgb(25, 25, 25);
    transform: translateX(2px);
    }
}

@media (max-width: 480px) {
  .site-header .topbar-inner {
    min-height: 50px;
    flex-direction: column;
    justify-content: center;
    gap: 3px;
    padding-block: 5px;
  }
  .site-header .topbar p,
  .site-header .topbar-links { font-size: 10px; }
  .site-header .topbar-links { gap: 6px; }
  .site-header .primary-nav { height: calc(100dvh - 122px); }
   .site-header .mega-grid a:hover {
    background: rgb(25, 25, 25);
    transform: translateX(2px);
    }
}

@media (max-width: 380px) {
  .site-header .brand img { width: 125px; }
  .site-header .menu-toggle { width: 42px; height: 42px; }
   .site-header .mega-grid a:hover {
    background: rgb(25, 25, 25);
    transform: translateX(2px);
    }
}