.desktop-nav { display: flex; align-items: center; gap: 28px; }
.desktop-nav > a,.nav-trigger { position: relative; border: 0; background: transparent; color: #b5c1cf; padding: 20px 0; font: 500 9px var(--mono); text-transform: uppercase; letter-spacing: .08em; cursor: pointer; }
.nav-trigger i { display: inline-block; margin-left: 5px; color: #5baeff; font-style: normal; transition: transform .25s; }
.nav-group:hover .nav-trigger,.nav-group:focus-within .nav-trigger,.nav-group.open .nav-trigger,.desktop-nav > a:hover { color: white; }
.nav-group:hover .nav-trigger i,.nav-group:focus-within .nav-trigger i,.nav-group.open .nav-trigger i { transform: rotate(180deg); }
.mega-menu { position: fixed; z-index: 60; top: 74px; left: 3vw; right: 3vw; min-height: 400px; display: grid; grid-template-columns: 1.2fr repeat(3,1fr); gap: 0; background: rgba(5,18,38,.98); border: 1px solid #254565; box-shadow: 0 35px 90px rgba(0,0,0,.52); backdrop-filter: blur(24px); opacity: 0; visibility: hidden; pointer-events: none; transform: translateY(-12px); transition: opacity .25s,visibility .25s,transform .25s; }
.nav-group:hover .mega-menu,.nav-group:focus-within .mega-menu,.nav-group.open .mega-menu { opacity: 1; visibility: visible; pointer-events: auto; transform: none; }
.mega-intro,.mega-column { padding: 34px; border-right: 1px solid #1e3853; }
.mega-menu > :last-child { border-right: 0; }
.mega-intro { display: flex; flex-direction: column; background: radial-gradient(circle at 30% 25%,rgba(10,105,207,.34),transparent 60%); }
.mega-intro > span,.mega-column > span { font: 500 7px var(--mono); letter-spacing: .14em; color: #4e91d3; }
.mega-intro h2 { font-size: 36px; line-height: .98; letter-spacing: -.05em; margin: 65px 0 14px; }
.mega-intro p { max-width: 270px; color: #8298ad; font-size: 10px; line-height: 1.7; }
.mega-intro > a { display: flex; align-items: center; justify-content: space-between; margin-top: auto; min-height: 50px; background: #087bff; padding: 12px 15px; font: 600 8px var(--mono); text-transform: uppercase; letter-spacing: .07em; }
.mega-intro > a i { font-style: normal; font-size: 15px; }
.mega-column { display: flex; flex-direction: column; gap: 0; }
.mega-column > span { margin-bottom: 28px; }
.mega-column a { padding: 15px 0; border-bottom: 1px solid #19324c; }
.mega-column a:last-child { border-bottom: 0; }
.mega-column strong { display: block; font-size: 12px; transition: color .2s,transform .2s; }
.mega-column small { display: block; margin-top: 6px; color: #617a92; font: 400 7px var(--mono); line-height: 1.5; }
.mega-column a:hover strong { color: #57adff; transform: translateX(4px); }
.steel-menu .mega-intro { background: radial-gradient(circle at 30% 25%,rgba(152,174,196,.2),transparent 60%); }
.mobile-menu-toggle,.mobile-menu { display: none; }

@media (max-width: 1100px) {
  .desktop-nav { gap: 19px; }
  .desktop-nav > a,.nav-trigger { font-size: 8px; }
  .mega-intro,.mega-column { padding: 25px; }
}

@media (max-width: 900px) {
  .desktop-nav { display: none!important; }
  .mobile-menu-toggle { display: flex; align-items: center; gap: 9px; min-height: 42px; border: 1px solid #2b4b6d; border-radius: 100px; background: rgba(5,24,48,.76); color: #c3d5e6; padding: 8px 11px 8px 14px; font: 500 8px var(--mono); text-transform: uppercase; letter-spacing: .07em; cursor: pointer; }
  .mobile-menu-toggle i { color: #65b4ff; font-style: normal; font-size: 15px; }
  .mobile-menu { position: fixed; z-index: 49; inset: 67px 0 0; display: block; background: rgba(2,10,22,.985); padding: 22px 18px 100px; overflow-y: auto; opacity: 0; visibility: hidden; transform: translateY(-15px); transition: opacity .3s,visibility .3s,transform .3s; }
  .mobile-menu.open { opacity: 1; visibility: visible; transform: none; }
  body.menu-open { overflow: hidden; }
  .mobile-menu-head { display: flex; align-items: center; justify-content: space-between; padding-bottom: 16px; border-bottom: 1px solid #1b344e; }
  .mobile-menu-head span { font: 500 8px var(--mono); color: #4a7ba9; letter-spacing: .14em; }
  .mobile-menu-head button { width: 38px; height: 38px; border: 1px solid #315374; border-radius: 50%; background: transparent; color: white; font-size: 22px; cursor: pointer; }
  .mobile-menu-section { border-bottom: 1px solid #1b344e; }
  .mobile-accordion { width: 100%; min-height: 66px; border: 0; background: transparent; color: white; display: flex; align-items: center; justify-content: space-between; padding: 0; font-size: 28px; font-weight: 600; letter-spacing: -.04em; cursor: pointer; }
  .mobile-accordion i { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid #315374; border-radius: 50%; color: #65b4ff; font: 400 15px var(--mono); font-style: normal; }
  .mobile-submenu { display: none; grid-template-columns: repeat(2,1fr); gap: 0 20px; padding: 0 0 20px; }
  .mobile-submenu.open { display: grid; }
  .mobile-submenu a { border-top: 1px solid #152c43; padding: 13px 0; font-size: 11px; }
  .mobile-submenu a span { display: block; margin-top: 5px; color: #617b94; font: 400 7px var(--mono); }
  .mobile-menu-links { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 20px; }
  .mobile-menu-links a { display: flex; align-items: center; justify-content: center; min-height: 52px; border: 1px solid #2b4b6d; font: 500 8px var(--mono); text-transform: uppercase; letter-spacing: .08em; }
}

@media (max-width: 560px) {
  .mobile-menu-toggle span { display: none; }
  .mobile-menu-toggle { width: 42px; justify-content: center; padding: 0; }
  .site-header .brand strong { font-size: 9px; }
  .site-header .brand small { font-size: 6px; }
  .site-header .brand img { width: 37px; height: 37px; }
  .nav-cta { min-width: 116px; min-height: 42px; font-size: 8px; }
  .nav-cta i { width: 24px; height: 24px; }
  .mobile-submenu { grid-template-columns: 1fr; }
}

@media (max-width: 390px) {
  .site-header .brand span { display: none; }
  .nav-cta { min-width: 126px; }
}