.site-header .mobile-menu { display: none; }

@media (max-width: 900px) {
  .site-header {
    position: fixed;
    z-index: 40;
    background: rgba(7, 17, 31, 0.9);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
  }

  .site-header .desktop-nav,
  .site-header > .header-cta { display: none; }

  .menu-toggle {
    position: relative;
    z-index: 42;
    width: 44px;
    height: 44px;
    padding: 10px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }

  .menu-toggle span {
    width: 25px;
    transition: transform 0.25s ease, opacity 0.2s ease;
  }

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

  .site-header.menu-open .mobile-menu {
    position: absolute;
    top: 100%;
    right: 0;
    bottom: auto;
    left: 0;
    z-index: 41;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    height: calc(100vh - 98px);
    height: calc(100dvh - 98px);
    max-height: none;
    padding: 10px var(--pad) max(20px, env(safe-area-inset-bottom));
    overflow-y: auto;
    overscroll-behavior: contain;
    background: rgba(7, 17, 31, 0.985);
  }

  .site-header .mobile-menu > a {
    display: flex;
    align-items: center;
    gap: 13px;
    min-height: 54px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.13);
    color: #fff;
    font: 600 clamp(18px, 5.4vw, 24px)/1.15 "Manrope", sans-serif;
    letter-spacing: -0.025em;
  }

  .site-header .mobile-menu > a small {
    color: #57d9ff;
    font: 600 9px/1 "Manrope", sans-serif;
    letter-spacing: 0.12em;
  }

  .site-header .mobile-menu > a[aria-current="page"] { color: #57d9ff; }

  .site-header .mobile-menu > .mobile-menu-cta {
    min-height: 50px;
    margin-top: 16px;
    padding: 0 18px;
    justify-content: space-between;
    border: 0;
    border-radius: 999px;
    background: #2d7cff;
    font-size: 15px;
    letter-spacing: 0;
  }

  body.menu-open { overflow: hidden; }
}

@media (max-width: 560px) {
  .site-header.menu-open .mobile-menu {
    height: calc(100vh - 78px);
    height: calc(100dvh - 78px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .menu-toggle span { transition: none; }
}