/* ==========================================================================
   Header (logo, mega-menu, mobile drawer) and footer
   Desktop navigation shows from 1024px; below that the drawer is used.
   ========================================================================== */

/* ---------------- Logo ---------------- */

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  flex-shrink: 0;
}
.logo__mark { width: 2rem; height: 2rem; }
.logo__frame { fill: none; stroke: hsl(var(--brand)); stroke-width: 2; }
.logo__peak { fill: none; stroke: hsl(var(--signal)); stroke-width: 2.4; stroke-linejoin: round; }
.logo__dot { fill: hsl(var(--signal)); }
.logo__text { display: flex; flex-direction: column; line-height: 1; }
.logo__name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: #fff;
}
.logo__name span { color: hsl(var(--brand)); }
.logo__tag {
  margin-top: 0.125rem;
  font-family: var(--font-mono);
  font-size: 8.5px;
  text-transform: uppercase;
  letter-spacing: 0.3em;
  color: var(--slate-400);
}

/* ---------------- Header bar ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid hsl(var(--navy-line));
  background: hsl(var(--navy-950) / 0.95);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
}
.site-header__bar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: var(--header-h);
}

.site-header__actions {
  display: none;
  align-items: center;
  gap: 0.5rem;
}
.header-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  height: 2.25rem;
  padding-inline: 0.75rem;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--slate-300);
  white-space: nowrap;
  transition: color var(--t-fast);
}
.header-link:hover { color: #fff; }
.header-link--user { border: 1px solid hsl(var(--navy-line)); }
.header-link--user .icon { color: hsl(var(--signal)); }
.btn--header {
  height: 2.25rem;
  padding-inline: 1rem;
  letter-spacing: 0.14em;
  white-space: nowrap;
}

/* ---------------- Desktop navigation + mega-menu ---------------- */

.main-nav { display: none; align-self: stretch; }
.main-nav__list { display: flex; height: 100%; }
.main-nav__trigger {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  height: 100%;
  padding-inline: 1rem;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--slate-300);
  white-space: nowrap;
  transition: color var(--t-fast);
}
.main-nav__trigger:hover { color: #fff; }
.main-nav__item.is-open .main-nav__trigger { color: hsl(var(--signal)); }
.main-nav__chevron { transition: transform var(--t-fast); }
.main-nav__item.is-open .main-nav__chevron { transform: rotate(180deg); }

/* Panel is positioned against the header bar, so it never runs off-screen */
.mega {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  z-index: 50;
  width: min(92vw, 52rem);
  padding-top: 0.5rem;
  transform: translateX(-50%);
}
.main-nav__item.is-open .mega,
html:not(.js) .main-nav__item:hover .mega,
html:not(.js) .main-nav__item:focus-within .mega {
  display: block;
}
.mega__panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid hsl(var(--navy-line));
  background: hsl(var(--navy-900));
  box-shadow: 0 24px 60px -12px rgba(2, 6, 23, 0.8);
}
.mega__panel--featured { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) 16rem; }
.mega__col { padding: 1.25rem; }
.mega__col + .mega__col,
.mega__featured { border-left: 1px solid hsl(var(--navy-line)); }
.mega__heading {
  margin-bottom: 0.75rem;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--slate-500);
}
.mega__link {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  padding: 0.5rem;
  transition: background-color var(--t-fast);
}
.mega__link:hover,
.mega__link:focus-visible { background: hsl(var(--navy-850)); }
.mega__label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate-100);
  transition: color var(--t-fast);
}
.mega__label .icon { opacity: 0; transition: opacity var(--t-fast); }
.mega__link:hover .mega__label,
.mega__link[aria-current] .mega__label { color: hsl(var(--signal)); }
.mega__link:hover .mega__label .icon { opacity: 1; }
.mega__desc { font-size: 0.75rem; line-height: 1.375; color: var(--slate-400); }
.mega__featured {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem;
  background: hsl(var(--navy-850));
}
.mega__featured-kicker {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: hsl(var(--signal));
}
.mega__featured-title {
  margin-top: 0.75rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.375;
  color: #fff;
}
.mega__featured-text { margin-top: 0.5rem; font-size: 0.75rem; line-height: 1.625; color: var(--slate-400); }
.mega__featured-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: hsl(var(--brand));
  transition: color var(--t-fast);
}
.mega__featured-cta:hover { color: hsl(var(--signal)); }

/* ---------------- Mobile toggle + drawer ---------------- */

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  margin-right: -0.625rem;
  color: var(--slate-200);
}
.nav-toggle__close,
.nav-toggle[aria-expanded="true"] .nav-toggle__open { display: none; }
.nav-toggle[aria-expanded="true"] .nav-toggle__close { display: inline-block; }

.mobile-nav {
  max-height: calc(100dvh - var(--header-h));
  overflow-y: auto;
  overscroll-behavior: contain;
  border-top: 1px solid hsl(var(--navy-line));
  background: hsl(var(--navy-950));
}
.mobile-nav__inner { padding: 1rem var(--gutter); }
.mobile-nav__group { border-bottom: 1px solid hsl(var(--navy-line) / 0.6); }
.mobile-nav__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 3.25rem;
  padding-block: 0.5rem;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--slate-200);
  list-style: none;
  cursor: pointer;
}
.mobile-nav__summary::-webkit-details-marker { display: none; }
.mobile-nav__chevron { transition: transform var(--t-fast); }
.mobile-nav__group[open] .mobile-nav__chevron { transform: rotate(180deg); }
.mobile-nav__links { padding: 0 0 1rem 0.75rem; }
@media (min-width: 640px) {
  .mobile-nav__links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 1.5rem; }
}
.mobile-nav__col { margin-bottom: 0.75rem; }
.mobile-nav__heading {
  margin-bottom: 0.375rem;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--slate-500);
}
.mobile-nav__link {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  font-size: 0.875rem;
  color: var(--slate-300);
}
.mobile-nav__link:hover,
.mobile-nav__link:active { color: hsl(var(--signal)); }
.mobile-nav__actions {
  display: grid;
  gap: 0.75rem;
  padding-block: 1.25rem;
}
@media (min-width: 640px) {
  .mobile-nav__actions { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

body.nav-open { overflow: hidden; }

/* ---------------- Breakpoint switch ---------------- */

@media (min-width: 1024px) {
  .main-nav { display: block; }
  .site-header__actions { display: flex; }
  .nav-toggle,
  .mobile-nav { display: none !important; }
}

/* 1024–1279px: tighten so logo, five menus and actions fit on one line */
@media (min-width: 1024px) and (max-width: 1279px) {
  .main-nav__trigger { padding-inline: 0.625rem; letter-spacing: 0.12em; }
  .site-header .logo__tag { display: none; }
  .site-header__actions .header-link { padding-inline: 0.5rem; }
  .header-link--user .header-link__text { display: none; }
}

/* ---------------- Footer ---------------- */

.site-footer {
  border-top: 1px solid hsl(var(--navy-line));
  background: hsl(var(--navy-950));
}
.site-footer__top {
  display: grid;
  gap: 2.5rem;
  padding-block: 3.5rem;
  border-bottom: 1px solid hsl(var(--navy-line));
}
@media (min-width: 1024px) {
  .site-footer__top { grid-template-columns: 20rem minmax(0, 1fr); }
}
.site-footer__about {
  margin-top: 1.25rem;
  max-width: 20rem;
  font-size: 0.875rem;
  line-height: 1.625;
  color: var(--slate-400);
}
.site-footer__status {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--slate-400);
}
.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2rem;
}
@media (min-width: 640px) {
  .site-footer__cols { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}
.site-footer__heading {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--slate-500);
}
.site-footer__links { display: grid; gap: 0.625rem; margin-top: 1rem; }
.site-footer__links a {
  font-size: 0.875rem;
  color: var(--slate-400);
  transition: color var(--t-fast);
}
.site-footer__links a:hover { color: hsl(var(--signal)); }
.site-footer__bottom {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-block: 1.75rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.025em;
  color: var(--slate-500);
}
.site-footer__bottom .meta-row { font-size: 11px; letter-spacing: 0.16em; }
@media (min-width: 768px) {
  .site-footer__bottom { flex-direction: row; align-items: center; justify-content: space-between; }
}