/* ── Ad Slot Containers — CLS-optimized ── */
.ad-slot {
  width: 100%;
  text-align: center;
  margin: var(--sp-xl) 0;
  min-height: 90px;
  contain: layout style;          /* isolate layout recalc */
  content-visibility: auto;       /* skip rendering when offscreen */
  contain-intrinsic-size: 0 90px; /* hint for content-visibility */
}
.ad-slot--rectangle {
  min-height: 280px;
  contain-intrinsic-size: 0 280px;
}
.ad-slot--footer {
  min-height: 100px;
  contain-intrinsic-size: 0 100px;
}
.ad-slot--hidden { display: none; }

/* Subtle label */
.ad-slot::before {
  content: 'Advertisement';
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  opacity: 0.5;
  margin-bottom: var(--sp-xs);
}