:root {
  --a0003-bg: #0f172a;
  --a0003-surface: #111827;
  --a0003-accent: #f97316;
}

body.theme-a0003 {
  background: radial-gradient(1000px 600px at 20% -10%, rgba(249,115,22,.25), transparent 60%), var(--a0003-bg);
  color: #e5e7eb;
}

.shell {
  min-height: 100vh;
}

.topbar {
  display: grid;
  grid-template-columns: auto auto 1fr;
  gap: .75rem;
  align-items: center;
  padding: .75rem 1rem;
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(17,24,39,.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.topbar-right {
  justify-self: end;
  opacity: .9;
}

.panes {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1rem;
  padding: 1rem;
}

@media (max-width: 900px) {
  .panes { grid-template-columns: 1fr; }
  .pane-left { display: none; }
  body.drawer-open .pane-left { display: block; }
}

.panel {
  background: var(--a0003-surface);
  border: 1px solid rgba(255,255,255,.08);
}

.panel-heading {
  background: rgba(249,115,22,.12);
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.menu-list a {
  color: #e5e7eb;
}

.menu-list a.is-active {
  background: rgba(249,115,22,.22);
  color: #fff;
}

.content-box {
  background: rgba(17,24,39,.55);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 1rem;
  padding: 1.25rem;
}

.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(255,255,255,.12);
}