/* Canonical MTM header. Light-page and legacy forum styles import this file. */
header.topbar {
  --mtm-logo-size: 56px;
  --topbar-bg: #0b1020;
  --topbar-fg: #fff;
  --topbar-link: #fff;
  --menu-link: #0f172a;
  --menu-max-height: calc(100dvh - 96px);
  position: relative;
  inset: auto;
  z-index: 10020;
  width: 100%;
  margin: 0;
  padding: 0;
  background: var(--topbar-bg);
  color: var(--topbar-fg);
  border: 0;
  border-bottom: 1px solid #243047;
  border-radius: 0;
  box-shadow: none;
  font: 400 16px/1.5 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  text-align: left;
  -webkit-font-smoothing: antialiased;
}
header.topbar, header.topbar * { box-sizing: border-box; }
header.topbar [hidden] { display: none !important; }
body.no-scroll { overflow: hidden !important; }

header.topbar > .container {
  box-sizing: border-box;
  position: relative;
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  max-width: 1280px;
  min-height: 80px;
  height: auto;
  margin: 0 auto;
  padding: 12px 16px;
  overflow: visible;
  /* Forum styles also use .container for white content cards. */
  background: transparent;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}
header.topbar .site-logo {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 12px;
  min-width: 0;
  margin: 0;
  padding: 0;
  color: #fff;
  text-decoration: none;
}
header.topbar .site-logo-img {
  display: block;
  flex: 0 0 auto;
  width: var(--mtm-logo-size);
  height: var(--mtm-logo-size);
  max-width: 72px;
  max-height: 72px;
  margin: 0;
  padding: 0;
  object-fit: contain;
  aspect-ratio: 1;
  border: 0;
  border-radius: 0;
  box-shadow: none;
  opacity: 1;
  filter: none;
  mix-blend-mode: normal;
}
header.topbar .site-name {
  display: block;
  position: static;
  max-width: none;
  margin: 0;
  padding: 0;
  color: #fff !important;
  -webkit-text-fill-color: #fff;
  font: 800 18px/1.15 Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  letter-spacing: .1px;
  text-shadow: none;
  white-space: nowrap;
  overflow: visible;
}
header.topbar .site-name::before,
header.topbar #site-nav .nav-link::after { content: none; }
header.topbar .tm { font-size: .6em; vertical-align: super; margin-left: 2px; color: inherit; }

header.topbar .hamburger {
  position: relative;
  /* Cached legacy themes hide this with !important at 768px. */
  display: block !important;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  margin: 0 0 0 auto;
  padding: 0;
  border: 1px solid #566074;
  border-radius: 10px;
  background: transparent;
  color: #fff;
  box-shadow: none;
  cursor: pointer;
  touch-action: manipulation;
}
header.topbar .hamburger .bar {
  position: absolute;
  left: 50%;
  width: 22px;
  height: 2px;
  margin: 0;
  background: #fff;
  border-radius: 2px;
  transform: translateX(-50%);
  transition: transform .18s ease, opacity .18s ease, top .18s ease;
}
header.topbar .hamburger .bar:nth-child(1) { top: 13px; }
header.topbar .hamburger .bar:nth-child(2) { top: 20px; }
header.topbar .hamburger .bar:nth-child(3) { top: 27px; }
header.topbar .hamburger[aria-expanded="true"] .bar:nth-child(1) { top: 20px; transform: translateX(-50%) rotate(45deg); }
header.topbar .hamburger[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
header.topbar .hamburger[aria-expanded="true"] .bar:nth-child(3) { top: 20px; transform: translateX(-50%) rotate(-45deg); }

header.topbar #site-nav {
  display: none !important;
  position: absolute;
  z-index: 2;
  top: 100%;
  left: 16px;
  right: 16px;
  width: auto;
  max-width: none;
  max-height: var(--menu-max-height);
  margin: 8px 0 0;
  padding: 8px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: #fff;
  border: 1px solid #dbe1ea;
  border-radius: 12px;
  box-shadow: 0 12px 28px #0003;
  text-align: left;
}
header.topbar #site-nav.is-open { display: block !important; }
header.topbar #site-nav .nav-link,
header.topbar #site-nav .nav-user-greeting {
  display: block;
  width: auto;
  min-height: 44px;
  margin: 0;
  padding: 11px 12px;
  color: var(--menu-link) !important;
  -webkit-text-fill-color: var(--menu-link) !important;
  background: transparent;
  border: 0;
  border-radius: 7px;
  box-shadow: none;
  font: 700 14px/22px Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
  letter-spacing: normal;
  text-decoration: none;
  text-transform: none;
  text-align: left;
  white-space: nowrap;
  opacity: 1;
  filter: none;
  mix-blend-mode: normal;
}
header.topbar #site-nav .nav-link:hover,
header.topbar #site-nav .nav-link.is-active {
  text-decoration: underline !important;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}
header.topbar #site-nav .nav-link:hover { background: #f1f5f9; }
header.topbar #site-nav .nav-user-greeting { font-weight: 400; white-space: normal; overflow-wrap: anywhere; }
header.topbar #site-nav .nav-link--cta {
  display: inline-block;
  margin: 4px 12px;
  padding: 10px 18px;
  background: #fff !important;
  color: #0f172a !important;
  -webkit-text-fill-color: #0f172a !important;
  border: 1px solid #cbd5e1 !important;
  border-radius: 999px;
  cursor: pointer;
}
header.topbar .site-logo:focus-visible,
header.topbar .hamburger:focus-visible,
header.topbar #site-nav .nav-link:focus-visible {
  outline: 2px solid #22b8c4;
  outline-offset: 3px;
}
header.topbar .menu-backdrop {
  position: fixed;
  inset: 0;
  /* Old header-light.css used a 10000 !important backdrop above the toggle. */
  z-index: 1 !important;
  background: #0006 !important;
  touch-action: none;
  pointer-events: auto !important;
}
header.topbar .site-logo,
header.topbar .hamburger { position: relative; z-index: 2; }

@media (min-width: 1200px) {
  header.topbar { --mtm-logo-size: 64px; }
  header.topbar > .container { min-height: 88px; padding: 12px 24px; }
  header.topbar .site-name { font-size: 20px; }
  header.topbar:not(.nav-collapsed) .hamburger { display: none !important; }
  header.topbar:not(.nav-collapsed) #site-nav {
    position: static;
    display: flex !important;
    flex: 0 0 auto;
    flex-wrap: nowrap;
    align-items: center;
    gap: 2px;
    width: auto;
    max-height: none;
    margin: 0 0 0 auto;
    padding: 0;
    overflow: visible;
    background: transparent;
    border: 0;
    border-radius: 0;
    box-shadow: none;
  }
  header.topbar:not(.nav-collapsed) #site-nav .nav-link,
  header.topbar:not(.nav-collapsed) #site-nav .nav-user-greeting {
    display: inline-block;
    padding: 11px 8px;
    color: #fff !important;
    -webkit-text-fill-color: #fff !important;
  }
  header.topbar:not(.nav-collapsed) #site-nav .nav-link:hover { background: transparent; }
  header.topbar:not(.nav-collapsed) #site-nav .nav-user-greeting {
    max-width: 144px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  header.topbar:not(.nav-collapsed) #site-nav .nav-link--cta {
    margin: 0 0 0 6px;
    padding: 10px 16px;
    color: #0f172a !important;
    -webkit-text-fill-color: #0f172a !important;
  }
}
@media (prefers-reduced-motion: reduce) {
  header.topbar .hamburger .bar { transition: none; }
}
@media print {
  header.topbar, [data-include*="/includes/header"], [data-include-html*="/includes/header"] { display: none !important; }
}