.product-purchase {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-md);
  width: 100%;
}

.add-to-cart-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 3rem;
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-md);
  background: var(--color-ink);
  color: var(--color-paper);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease,
    color 0.2s ease, transform 0.2s ease;
}

.add-to-cart-btn:hover:not(:disabled) {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-ink);
  transform: translateY(-1px);
}

.add-to-cart-btn:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.mobile-nav-toggle {
  appearance: none;
  padding: 0.5rem;
  border: 0;
  background: transparent;
  color: var(--color-ink);
}

.mobile-nav-toggle span {
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.mobile-nav-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(7px) rotate(45deg);
}

.mobile-nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.mobile-nav-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-7px) rotate(-45deg);
}

:where(a, button, input, select, summary, textarea):focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xs);
}

.hero-picture {
  display: block;
  width: 100%;
  height: 100%;
}

.hero-picture img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.not-found-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 4.5rem;
  height: 4.5rem;
  margin-inline: auto;
  border-radius: 50%;
  background: var(--color-ink);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
}

.product-card-count {
  color: var(--color-ink-soft);
  font-size: 0.8125rem;
  line-height: 1.4;
}

.bundle-savings {
  align-self: flex-start;
  margin-top: var(--spacing-2xs);
  padding: 0.3rem 0.55rem;
  border-radius: var(--radius-sm);
  background: var(--color-ink);
  color: var(--color-paper);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.product-count {
  margin-top: calc(var(--spacing-md) * -1);
  color: var(--color-ink-soft);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.bundle-value {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-xs);
  margin-top: calc(var(--spacing-md) * -1);
}

.bundle-value strong {
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  background: var(--color-ink);
  color: var(--color-paper);
  font-size: 0.8125rem;
  letter-spacing: 0.03em;
}

.bundle-value span {
  color: var(--color-ink-soft);
  font-size: 0.8125rem;
}

.product-comparison {
  scroll-margin-top: 6rem;
  border-top: 1px solid var(--color-rule);
  background: var(--color-paper-warm);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.comparison-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  min-height: 100%;
  padding: var(--spacing-lg);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-md);
  background: var(--color-paper);
}

.comparison-number {
  color: var(--color-accent-deep);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.comparison-card h3 {
  color: var(--color-ink);
  font-size: 1.35rem;
}

.comparison-card p {
  flex: 1;
  color: var(--color-ink-soft);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.comparison-card a {
  align-self: flex-start;
  padding-bottom: 0.15rem;
  border-bottom: 1px solid var(--color-accent);
  color: var(--color-ink);
  font-size: 0.875rem;
  font-weight: 700;
}

.comparison-note {
  margin-top: var(--spacing-lg);
  color: var(--color-mute);
  font-size: 0.8125rem;
  line-height: 1.6;
}

@media (min-width: 768px) {
  .add-to-cart-btn {
    width: auto;
    min-width: 12rem;
  }

  .hero-actions {
    flex-direction: row;
    align-items: center;
  }

  .comparison-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .comparison-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}