.menu-backdrop {
  display: none;
}

@media (max-width: 980px) {
  body.menu-open {
    overflow: hidden;
    overscroll-behavior: none;
    touch-action: none;
  }

  .site-header {
    min-height: 72px;
  }

  .nav-shell {
    position: relative;
    min-height: 72px;
    flex-wrap: nowrap;
    align-items: center;
    padding: 0.65rem max(1rem, calc((100vw - var(--container)) / 2));
  }

  .brand {
    position: relative;
    z-index: 58;
  }

  .menu-toggle {
    position: relative;
    top: auto;
    right: auto;
    z-index: 72;
    flex: 0 0 44px;
    width: 44px;
    height: 44px;
    margin-left: auto;
    border: 1px solid rgba(141, 189, 255, 0.58);
    box-shadow: 0 8px 24px rgba(7, 21, 47, 0.16);
    transition: background 220ms ease, color 220ms ease, border-color 220ms ease, transform 220ms ease;
  }

  .menu-toggle span {
    width: 20px;
    height: 2px;
    transition: transform 260ms var(--ease-out), opacity 160ms ease;
    transform-origin: center;
  }

  .menu-toggle[aria-expanded="true"] {
    border-color: rgba(17, 34, 75, 0.18);
    background: var(--sun);
    color: var(--navy);
    box-shadow: none;
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0.35);
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .nav-menu {
    position: fixed;
    inset: 0 0 0 auto;
    z-index: 66;
    display: flex !important;
    width: min(88vw, 420px);
    height: 100vh;
    height: 100dvh;
    overflow-y: auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: clamp(6.5rem, 16vh, 8rem) clamp(1.35rem, 5vw, 2rem) max(1.4rem, env(safe-area-inset-bottom));
    background:
      radial-gradient(circle at 100% 0, rgba(141, 189, 255, 0.28), transparent 34%),
      linear-gradient(155deg, #f8fbff 0%, #eaf2ff 100%);
    box-shadow: -24px 0 65px rgba(7, 21, 47, 0.3);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translate3d(104%, 0, 0);
    transition:
      transform 480ms var(--ease-out),
      opacity 220ms ease,
      visibility 0s linear 480ms;
  }

  .nav-menu::before {
    content: "Navigation";
    display: block;
    margin-bottom: 0.7rem;
    color: #4d75b7;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.14em;
    text-transform: uppercase;
  }

  .nav-menu.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate3d(0, 0, 0);
    transition:
      transform 480ms var(--ease-out),
      opacity 220ms ease,
      visibility 0s linear 0s;
  }

  .nav-menu a,
  .nav-menu a:not(.nav-cta) {
    position: relative;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(17, 34, 75, 0.12);
    color: var(--navy);
    font-size: clamp(1.35rem, 5.5vw, 1.75rem);
    font-weight: 900;
    line-height: 1.05;
    letter-spacing: -0.035em;
  }

  .nav-menu a:not(.nav-cta)::after {
    content: "\2197";
    position: absolute;
    right: 0;
    color: #4d75b7;
    font-size: 0.9em;
    opacity: 0;
    transform: translate3d(-8px, 2px, 0);
    transition: opacity 180ms ease, transform 180ms ease;
  }

  .nav-menu a:not(.nav-cta):hover::after,
  .nav-menu a:not(.nav-cta):focus-visible::after {
    opacity: 1;
    transform: translate3d(0, 2px, 0);
  }

  .nav-menu .nav-cta {
    min-height: 58px;
    margin-top: auto;
    padding: 0.95rem 1.1rem;
    border: 0;
    border-radius: 8px;
    background: var(--navy);
    color: #fff;
    font-size: 1.05rem;
    letter-spacing: 0;
  }

  .menu-backdrop {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: block;
    width: 100%;
    height: 100%;
    padding: 0;
    border: 0;
    background: rgba(7, 21, 47, 0.62);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 280ms ease, visibility 0s linear 280ms;
  }

  .site-header.is-menu-open .menu-backdrop {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity 280ms ease, visibility 0s linear 0s;
  }
}

@media (max-width: 680px) {
  .site-header,
  .nav-shell {
    min-height: 68px;
  }

  .nav-shell {
    padding: 0.55rem 0.9rem;
  }

  .brand {
    width: 122px;
    padding-left: 0.2rem;
  }

  .brand img {
    width: 108px;
  }

  .menu-toggle {
    flex-basis: 42px;
    width: 42px;
    height: 42px;
  }

  .nav-menu {
    width: min(92vw, 390px);
    padding-inline: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .nav-menu,
  .menu-backdrop,
  .menu-toggle,
  .menu-toggle span {
    transition-duration: 0.01ms !important;
  }
}