/* ===== HOW IT WORKS ===== */
.how-section {
  background: linear-gradient(180deg, var(--bg-mid) 0%, var(--bg) 100%);
}

.layers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

@media (max-width: 768px) {
  .layers-grid { grid-template-columns: 1fr; }
}

.layer-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 24px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.25s ease;
}
.layer-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: #4a9eff33;
}

.layer-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
}

.layer-card.l1::before { background: var(--red); }
.layer-card.l2::before { background: var(--blue); }
.layer-card.l3::before { background: var(--green); }

.layer-card .layer-num {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.layer-card.l1 .layer-num { color: var(--red-light); }
.layer-card.l2 .layer-num { color: var(--blue); }
.layer-card.l3 .layer-num { color: var(--green); }

.layer-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 4px; }

.layer-card .when {
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.layer-card p { font-size: 14px; color: var(--text-secondary); margin-bottom: 16px; line-height: 1.6; }

.layer-card .example-box {
  background: #0a0a16;
  border: 1px solid #1a1d30;
  border-radius: 8px;
  padding: 12px 14px;
  font-size: 12px;
  color: var(--green);
  line-height: 1.6;
  white-space: pre-wrap;
}