.product-stage {
  position: relative; z-index: 1; min-width: 0;
  padding: clamp(20px, 2.6vw, 32px);
  border: 1px solid rgba(255, 255, 255, .8); border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, .78); box-shadow: var(--shadow-md); backdrop-filter: blur(16px);
}
.stage-heading h2 { margin-bottom: 20px; font-size: 1.5rem; }
.stage-controls { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; }
.stage-controls[hidden] { display: none; }
.stage-control {
  display: inline-flex; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; gap: 10px;
  border: 1px solid var(--color-line); border-radius: var(--radius-pill); background: white; color: var(--color-ink); font-weight: 700; cursor: pointer;
}
.stage-control:hover { background: var(--color-brand-soft); }
.stage-toggle { padding-inline: 16px; font-size: .8rem; }
.stage-count { margin-left: auto; margin-right: 8px; color: var(--color-muted); font-size: .75rem; font-variant-numeric: tabular-nums; }
.stage-panels { position: relative; height: 440px; touch-action: pan-y; }
.stage-panel { position: absolute; inset: 0; visibility: hidden; opacity: 0; transform: translateY(10px); transition: opacity .45s ease, transform .45s ease; }
.stage-panel.is-active { visibility: visible; opacity: 1; transform: none; }
.stage-product { display: grid; height: 100%; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); align-items: center; gap: 24px; text-decoration: none; border-radius: 12px; }
.stage-artwork { position: relative; padding-bottom: 18px; }
.stage-logo {
  position: absolute; right: -8px; bottom: 6px; display: grid; width: 86px; height: 86px; place-items: center; padding: 7px;
  border: 1px solid color-mix(in srgb, var(--stage-accent) 25%, white); border-radius: 23px;
  background: rgba(255, 255, 255, .96); box-shadow: 0 10px 28px rgba(20, 21, 34, .17); transform: rotate(6deg);
}
.stage-logo img { width: 100%; height: 100%; object-fit: contain; border-radius: 15px; transform: rotate(-6deg); }
[data-stage-panel="prompt"], [data-stage-tab="prompt"] { --stage-accent: var(--accent-learning); }
[data-stage-panel="money"], [data-stage-tab="money"] { --stage-accent: var(--accent-money); }
[data-stage-panel="scanner"], [data-stage-tab="scanner"] { --stage-accent: var(--accent-scanning); }
[data-stage-panel="scamwise"], [data-stage-tab="scamwise"] { --stage-accent: var(--accent-safety); }
.stage-caption strong, .stage-caption small { display: block; }
.stage-caption strong { font-family: "Manrope", sans-serif; font-size: clamp(1.2rem, 1.8vw, 1.65rem); line-height: 1.2; letter-spacing: -.04em; }
.stage-caption small { margin-top: 12px; color: var(--color-muted); font-size: .92rem; line-height: 1.6; }
.stage-explore { display: inline-flex; align-items: center; gap: 8px; margin-top: 24px; font-size: .78rem; font-weight: 800; }
.stage-explore span { color: var(--stage-accent); font-size: 1.1rem; }
.stage-tabs { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4px; border-top: 1px solid var(--color-line); }
.stage-tab { position: relative; min-width: 0; min-height: 64px; padding: 14px 4px; border: 0; background: transparent; color: var(--color-muted); font-size: .77rem; font-weight: 800; line-height: 1.4; cursor: pointer; }
.stage-tab::after { position: absolute; inset: auto 8px 3px; height: 3px; border-radius: 4px; background: var(--stage-accent); opacity: .2; transform: scaleX(.4); transition: transform .3s, opacity .3s; content: ""; }
.stage-tab.is-active { color: var(--color-ink); }
.stage-tab.is-active::after { opacity: 1; transform: scaleX(1); }
.is-rotating .stage-tab.is-active::after { animation: stage-heartbeat 2.6s ease-in-out infinite; }
@keyframes stage-heartbeat {
  0%, 45%, 100% { transform: scaleX(1) scaleY(1); opacity: .8; box-shadow: 0 0 0 transparent; }
  12%, 30% { transform: scaleX(1.04) scaleY(1.6); opacity: 1; box-shadow: 0 0 12px color-mix(in srgb, var(--stage-accent) 55%, transparent); }
  20% { transform: scaleX(1) scaleY(1); opacity: .85; }
}
@media (max-width: 640px) {
  .product-stage { padding: 20px; }
  .stage-panels { height: 420px; }
  .stage-product { gap: 20px; }
  .stage-logo { width: 72px; height: 72px; border-radius: 20px; }
  .stage-tabs { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4px 12px; }
  .stage-tab { min-height: 48px; font-size: .8rem; }
}
@media (max-width: 360px) {
  .product-stage { padding: 16px; }
  .stage-panels { height: 350px; }
  .stage-product { gap: 16px; }
  .stage-caption strong { font-size: 1.15rem; }
  .stage-caption small { font-size: .8rem; }
  .stage-logo { width: 64px; height: 64px; }
}
@media (prefers-reduced-motion: reduce) {
  .stage-panel { transition: none; transform: none; }
  .stage-tab::after { animation: none !important; transition: none; }
}