.app-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 0;
}

.app-card {
  width: min(100%, 640px);
}

.app-card h1 {
  font-size: clamp(2rem, 5vw, 3rem);
}

.status-region {
  min-height: 1.5rem;
  margin-top: 0.9rem;
}

.result-card {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: 1.2rem;
  background: rgba(15, 118, 110, 0.06);
  border: 1px solid rgba(15, 118, 110, 0.16);
}

.app-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.25rem;
}

.purchase-shell {
  width: min(100%, 1120px);
}

.purchase-tabs {
  display: inline-flex;
  gap: 0.75rem;
  padding: 0.4rem;
  margin: 1.5rem 0;
  border-radius: 999px;
  background: rgba(17, 33, 31, 0.06);
}

.purchase-tab {
  padding: 0.8rem 1.35rem;
  border-radius: 999px;
  color: var(--color-muted);
  cursor: pointer;
}

.purchase-tab.is-active {
  background: var(--color-contrast);
  color: #fff;
}

.purchase-panel + .purchase-panel {
  margin-top: 1rem;
}

.purchase-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.85fr);
  gap: 1.5rem;
  align-items: start;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.product-option {
  display: grid;
  gap: 0.9rem;
  padding: 1.2rem;
  border: 1px solid var(--color-border);
  border-radius: 1.2rem;
  background: rgba(255, 255, 255, 0.62);
}

.product-option.is-selected {
  border-color: rgba(15, 118, 110, 0.42);
  background: rgba(15, 118, 110, 0.08);
  box-shadow: inset 0 0 0 1px rgba(15, 118, 110, 0.12);
}

.product-option__top {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
}

.product-option__top h3 {
  margin: 0;
}

.product-option .price-tag {
  margin: 0;
  font-size: 2rem;
}

.product-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.product-badge {
  padding: 0.42rem 0.78rem;
  border-radius: 999px;
  background: rgba(17, 33, 31, 0.08);
  color: var(--color-text);
  font-size: 0.92rem;
}

.purchase-form {
  padding: 1.35rem;
  border: 1px solid var(--color-border);
  border-radius: 1.25rem;
  background: rgba(255, 252, 246, 0.82);
}

@media (max-width: 900px) {
  .purchase-layout,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .purchase-tabs {
    width: 100%;
    justify-content: space-between;
  }
}