.campaign {
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.campaign-canvas {
  position: absolute;
  inset: 0;
  z-index: var(--z-canvas);
  opacity: 0.3;
}

.campaign-content {
  position: relative;
  z-index: var(--z-content);
}

.campaign-header {
  text-align: center;
  margin-bottom: 4rem;
}

.campaign-header .label {
  margin-bottom: 1rem;
}

/* ── Slider ── */
.campaign-builder {
  max-width: 800px;
  margin: 0 auto;
}

.campaign-slider-wrap {
  margin-bottom: 3rem;
}

.campaign-budget-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.campaign-budget-value {
  font-family: var(--font-mono);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: var(--fw-bold);
  color: var(--accent-cyan);
  letter-spacing: -0.02em;
}

.campaign-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 3px;
  background: var(--glass-border);
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.campaign-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
  cursor: pointer;
  transition: box-shadow 0.3s, transform 0.3s;
}

.campaign-slider::-webkit-slider-thumb:hover {
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
  transform: scale(1.15);
}

.campaign-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 2px solid var(--bg-primary);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
  cursor: pointer;
}

.campaign-slider-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

/* ── Results Grid ── */
.campaign-results {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.campaign-metric {
  text-align: center;
  padding: 2rem 1.5rem;
}

.campaign-metric-value {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: var(--fw-bold);
  margin-bottom: 0.5rem;
  line-height: 1;
  color: var(--text-primary);
  transition: color 0.3s;
}

.glass-card--cyan .campaign-metric-value {
  color: var(--accent-cyan);
}

.glass-card--orange .campaign-metric-value {
  color: var(--accent-orange);
}

.campaign-metric-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* ── CTA ── */
.campaign-cta {
  text-align: center;
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .campaign-results {
    grid-template-columns: 1fr;
  }
}