/* ══════════════════════════════════════════════════════════════════════
   HEADER
   ══════════════════════════════════════════════════════════════════════ */

div.header {
  background-color: var(--color-dark);
  color: var(--color-light);
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding: 10px 20px;
  box-sizing: border-box;
  position: fixed;
  top: 0;
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

div.header a {
  color: var(--color-light);
  text-decoration: none;
}

div.header a:visited {
  color: var(--color-light);
}

div.header a:hover,
div.header a.title:hover {
  color: var(--color-light);
  text-decoration: underline;
}

div.header a.title {
  font-size: 1.125rem;
  line-height: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

img.title-icon {
  height: 24px;
  margin-right: 10px;
  margin-bottom: -6px;
  margin-top: -6px;
  filter: drop-shadow(0 0 0.1em #fff);
}

@media (min-height: 480px) {
  div.header { padding: 12px 20px 15px; }

  img.title-icon {
    height: 28px;
    margin-right: 10px;
    margin-bottom: -8px;
    margin-top: -8px;
  }

  div.header a.title {
    font-size: 1.25rem;
    line-height: 1.75rem;
  }
}

@media (min-height: 640px) {
  div.header { padding: 16px 20px 20px; }

  img.title-icon {
    height: 36px;
    margin-right: 10px;
    margin-bottom: -10px;
    margin-top: -10px;
  }

  div.header a.title {
    font-size: 1.375rem;
    line-height: 2rem;
  }
}

@media (min-height: 800px) {
  div.header { padding: 20px 20px 24px; }

  img.title-icon {
    height: 42px;
    margin-right: 10px;
    margin-bottom: -12px;
    margin-top: -12px;
  }

  div.header a.title {
    font-size: 1.5rem;
    line-height: 2.25rem;
  }
}

@media (min-width: 580px) {
  span.title-text { display: inline; }
}

@media (max-width: 579px) {
  span.title-text { display: none; }
}

/* Admin header: distinct background to signal the admin context */
body.admin div.header {
  background-color: #370300;
}

/* ══════════════════════════════════════════════════════════════════════
   NAVIGATION
   ══════════════════════════════════════════════════════════════════════ */

.hamburger-btn {
  background: none;
  border: none;
  color: var(--color-light);
  font-size: 1.375rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}

.hamburger-btn:hover {
  opacity: 0.8;
}

.nav-menu {
  display: none;
  position: fixed;
  top: 0;
  right: 0;
  width: 220px;
  height: 100vh;
  background: var(--color-dark);
  z-index: var(--z-nav);
  padding: 1rem 0;
  box-shadow: -4px 0 16px rgba(0, 0, 0, 0.3);
  overflow-y: auto;
}

.nav-menu--open {
  display: block;
}

body.nav-open {
  overflow: hidden;
}

.nav-close-btn {
  display: block;
  background: none;
  border: none;
  color: var(--color-light);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.5rem 1.25rem;
  margin-left: auto;
}

.nav-close-btn:hover {
  opacity: 0.8;
}

/* Shared typography for all nav items */
.nav-link,
.nav-group-label,
.nav-sublink {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-link {
  display: block;
  padding: 0.65rem 1.25rem;
  color: var(--color-light);
  text-decoration: none;
}

.nav-link:hover {
  background: var(--color-mid);
  text-decoration: none;
}

.nav-group {
  margin: 0.25rem 0;
}

.nav-group-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.25rem 0.25rem;
  color: #aaaabc;
  cursor: pointer;
  user-select: none;
  list-style: none;
}

.nav-group-label::-webkit-details-marker {
  display: none;
}

.nav-group-label svg {
  flex-shrink: 0;
  transition: transform var(--duration);
}

details.nav-group[open] > .nav-group-label svg {
  transform: rotate(180deg);
}

.nav-sublink {
  display: block;
  padding: 0.45rem 1.25rem 0.45rem 2rem;
  color: var(--color-light);
  text-decoration: none;
}

.nav-sublink:hover {
  background: var(--color-mid);
  text-decoration: none;
}