:root {
  --aa0012-a: #fff7ed;
  --aa0012-b: #eff6ff;
  --aa0012-accent: #2563eb;
}

body.theme-aa0012 {
  background: linear-gradient(135deg, var(--aa0012-a), var(--aa0012-b));
}

#top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255,255,255,.75);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0,0,0,.06);
}

.logo-text a {
  font-weight: 800;
  color: #111827;
  text-decoration: none;
}

.split-screen {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: calc(100vh - 64px);
}

@media (max-width: 900px) {
  .split-screen { grid-template-columns: 1fr; }
}

.split-a {
  padding: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.split-b {
  padding: 1.25rem;
}

.nav-card {
  width: min(420px, 100%);
  background: rgba(255,255,255,.8);
  border: 1px solid rgba(0,0,0,.06);
  border-radius: 1rem;
  padding: 1rem;
}

.content-card {
  background: rgba(255,255,255,.8);
  border: 1px solid rgba(0,0,0,.06);
  border-radius: 1rem;
  padding: 1rem;
}

.vertical.menu li.is-active > a {
  color: var(--aa0012-accent);
  font-weight: 700;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

#footer {
  padding: 1.5rem 0;
  border-top: 1px solid rgba(0,0,0,.08);
}