/*
 * V85 mobile navigation overlay
 * Load after home.css / subpages.css. All visual overrides are intentionally
 * bounded to the existing mobile-navigation range so the desktop mega menus
 * remain byte-for-byte and visually untouched.
 */

@media (max-width: 980px) {
  :root {
    --v85-mobile-header-height: 64px;
    --v85-nav-paper: #f6f7f8;
    --v85-nav-ink: #111820;
    --v85-nav-muted: #737e89;
    --v85-nav-line: #dfe3e7;
    --v85-nav-blue: #0071e3;
    --v85-nav-blue-soft: rgba(0, 113, 227, .075);
  }

  html.v85-mobile-nav-open,html.v85-mobile-nav-open body {
    width: 100%;
    height: 100%;
    overflow: hidden !important;
    overscroll-behavior: none;
  }

  body.v84-mobile-nav-open {
    overflow: hidden !important;
    overscroll-behavior: none;
  }

  /* The confirmed fixed header and wordmark stay visible above the menu. */
  .topbar {
    z-index: 99500 !important;
  }

  .topbar .nav-links,.topbar .homepage-nav-links {
    display: none !important;
  }

  /* Two restrained rules become a close icon in the same 44px target. */
  .v84-mobile-nav-toggle {
    position: relative;
    z-index: 2;
    display: inline-flex !important;
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0 !important;
    border-radius: 0;
    color: inherit;
    background: transparent !important;
    box-shadow: none !important;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }

  .v84-mobile-nav-toggle > span {
    position: relative;
    display: block;
    width: 21px;
    height: 14px;
    border: 0 !important;
  }

  .v84-mobile-nav-toggle > span::before,.v84-mobile-nav-toggle > span::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 0;
    width: 21px;
    height: 1.5px;
    border: 0 !important;
    border-radius: 999px;
    background: currentColor;
    transform-origin: center;
    transition: transform .28s cubic-bezier(.22, 1, .36, 1),
                opacity .18s ease;
  }

  .v84-mobile-nav-toggle > span::before {
    transform: translateY(-4.5px);
  }

  .v84-mobile-nav-toggle > span::after {
    transform: translateY(4.5px);
  }

  .v84-mobile-nav-toggle[aria-expanded="true"] > span::before {
    transform: translateY(-.75px) rotate(45deg);
  }

  .v84-mobile-nav-toggle[aria-expanded="true"] > span::after {
    transform: translateY(-.75px) rotate(-45deg);
  }

  .v84-mobile-nav-toggle:focus-visible,.v84-mobile-drawer a:focus-visible,.v84-mobile-drawer summary:focus-visible {
    outline: 2px solid var(--v85-nav-blue);
    outline-offset: 3px;
  }

  .v84-mobile-drawer[hidden] {
    display: none !important;
  }

  /* Full-width navigation starts immediately below the live header height. */
  .v84-mobile-drawer:not([hidden]) {
    position: fixed;
    inset: var(--v85-mobile-header-height) 0 0 !important;
    z-index: 99490;
    display: block !important;
    width: 100%;
    height: auto;
    color: var(--v85-nav-ink);
    background: var(--v85-nav-paper);
  }

  .v84-mobile-drawer[data-v85-open] {
    animation: v85-nav-reveal .28s cubic-bezier(.22, 1, .36, 1) both;
  }

  .v84-mobile-nav-backdrop,.v84-mobile-nav-head {
    display: none !important;
  }

  .v84-mobile-nav-panel {
    position: absolute !important;
    inset: 0 !important;
    width: 100% !important;
    max-width: none !important;
    height: 100% !important;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 0;
    color: var(--v85-nav-ink);
    background: var(--v85-nav-paper) !important;
    border: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-gutter: stable;
  }

  .v84-mobile-nav-list {
    width: min(100%, 760px);
    margin: 0 auto;
    padding: 12px clamp(22px, 5.2vw, 48px)
      calc(42px + env(safe-area-inset-bottom));
  }

  .v84-mobile-nav-list details {
    border: 0 !important;
    border-bottom: 1px solid var(--v85-nav-line) !important;
    background: transparent !important;
  }

  .v84-mobile-nav-list summary {
    position: relative;
    display: flex;
    min-height: 64px;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 7px 42px 7px 2px;
    color: var(--v85-nav-ink);
    background: transparent !important;
    cursor: pointer;
    list-style: none;
    font-size: clamp(18px, 2.2vw, 21px);
    font-weight: 590;
    line-height: 1.35;
    letter-spacing: -.012em;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: color .2s ease;
  }

  .v84-mobile-nav-list summary::-webkit-details-marker {
    display: none;
  }

  .v84-mobile-nav-list summary::before,.v84-mobile-nav-list summary::after {
    content: "" !important;
    position: absolute;
    top: 50%;
    right: 4px;
    width: 15px;
    height: 1px;
    border: 0 !important;
    background: #7d8791;
    transform-origin: center;
    transition: transform .24s cubic-bezier(.22, 1, .36, 1),
                background-color .2s ease;
  }

  .v84-mobile-nav-list summary::after {
    transform: rotate(90deg);
  }

  .v84-mobile-nav-list details[open] > summary,.v84-mobile-nav-list details[data-v85-current-group] > summary {
    color: var(--v85-nav-blue);
  }

  .v84-mobile-nav-list details[open] > summary::before,.v84-mobile-nav-list details[open] > summary::after {
    background: var(--v85-nav-blue);
  }

  .v84-mobile-nav-list details[open] > summary::after {
    transform: rotate(0deg);
  }

  .v84-mobile-nav-links {
    padding: 0 0 22px !important;
  }

  .v84-mobile-subgroup {
    padding: 12px 0 5px !important;
  }

  .v84-mobile-subgroup + .v84-mobile-subgroup {
    margin-top: 9px;
    padding-top: 19px !important;
    border-top: 1px solid rgba(17, 24, 32, .075) !important;
  }

  .v84-mobile-subgroup > strong {
    display: block;
    padding: 0 10px 7px !important;
    color: var(--v85-nav-muted) !important;
    font-size: 11px !important;
    font-weight: 600 !important;
    line-height: 1.5;
    letter-spacing: .09em !important;
  }

  .v84-mobile-nav-links a {
    position: relative;
    display: flex !important;
    min-height: 48px !important;
    align-items: center;
    margin: 0 !important;
    padding: 10px 34px 10px 10px !important;
    border: 0 !important;
    border-radius: 2px !important;
    color: #3f4852 !important;
    background: transparent !important;
    box-shadow: none !important;
    font-size: 14px !important;
    font-weight: 430;
    line-height: 1.6 !important;
    overflow-wrap: anywhere;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: color .18s ease, background-color .18s ease;
  }

  .v84-mobile-nav-links a::after {
    content: "";
    position: absolute;
    top: 50%;
    right: 11px;
    width: 6px;
    height: 6px;
    border-top: 1px solid #a0a8b0;
    border-right: 1px solid #a0a8b0;
    transform: translateY(-50%) rotate(45deg);
    transition: border-color .18s ease, transform .18s ease;
  }

  .v84-mobile-nav-links a:hover,.v84-mobile-nav-links a:focus-visible {
    color: var(--v85-nav-blue) !important;
    background: rgba(17, 24, 32, .035) !important;
  }

  .v84-mobile-nav-links a:hover::after,.v84-mobile-nav-links a:focus-visible::after {
    border-color: var(--v85-nav-blue);
    transform: translate(2px, -50%) rotate(45deg);
  }

  .v84-mobile-nav-links a.is-current {
    color: #005fbe !important;
    background: var(--v85-nav-blue-soft) !important;
    box-shadow: inset 3px 0 var(--v85-nav-blue) !important;
    font-weight: 620;
  }

  .v84-mobile-nav-links a.is-current::after {
    border-color: var(--v85-nav-blue);
  }

  .v84-mobile-nav-links a[data-v84-overview] {
    color: var(--v85-nav-blue) !important;
    font-weight: 590;
  }

  @keyframes v85-nav-reveal {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }
}

@media (max-width: 980px) and (prefers-reduced-motion: reduce) {
  .v84-mobile-drawer[data-v85-open] {
    animation: none;
  }

  .v84-mobile-nav-toggle > span::before,.v84-mobile-nav-toggle > span::after,.v84-mobile-nav-list summary::before,.v84-mobile-nav-list summary::after {
    transition: none;
  }
}