/* Top bar, sidebar and page grid. */
.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: 56px;
  padding: 0 20px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 700; font-size: 18px; }
.brand:hover { text-decoration: none; }
.topbar-tools { display: flex; align-items: center; gap: 8px; }

.lang { display: flex; padding: 3px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); }
.lang a { padding: 3px 11px; border-radius: 999px; font-size: 13px; color: var(--muted); }
.lang a:hover { text-decoration: none; color: var(--text); }
.lang a[aria-current='true'] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.icon-btn { width: 34px; height: 34px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); }

.shell { display: grid; grid-template-columns: 240px minmax(0, 1fr); max-width: 1120px; margin: 0 auto; }
.sidebar { position: sticky; top: 56px; align-self: start; max-height: calc(100vh - 56px); overflow-y: auto; padding: 28px 12px 28px 20px; }
.sidebar-title { margin: 0 0 8px 10px; font-size: 12px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--muted); font-size: 14.5px; }
.sidebar a:hover { color: var(--text); text-decoration: none; background: var(--sunken); }
.sidebar a[aria-current='true'] { color: var(--accent); background: var(--accent-soft); font-weight: 600; }

main { min-width: 0; padding: 12px 32px 96px; }

@media (max-width: 800px) {
  .shell { display: block; }
  .topbar { padding: 0 16px; }
  .sidebar { position: static; max-height: none; padding: 12px 16px 0; }
  .sidebar-title { display: none; }
  .sidebar ul { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 8px; }
  .sidebar a { white-space: nowrap; border: 1px solid var(--border); border-radius: 999px; padding: 4px 12px; }
  main { padding: 4px 16px 72px; }
}

@media (max-width: 480px) { .lang a { padding: 3px 7px; font-size: 12px; } }
.ent-link { padding: 5px 12px; border: 1px solid var(--accent); border-radius: 999px; color: var(--accent); font-size: 13px; font-weight: 600; }
.ent-link:hover { text-decoration: none; background: var(--accent-soft); }
@media (max-width: 480px) { .ent-link { display: none; } }