.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  min-height: 2.75rem;
  padding: 0.65rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-weight: var(--fw-semibold);
  text-decoration: none;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn--primary {
  background: var(--color-secondary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-secondary-dark);
}

.btn--secondary {
  background: transparent;
  border-color: currentColor;
}

.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

.page-hero .btn--secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.65);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
}

.btn--ghost:hover {
  background: var(--color-surface);
}

.btn--outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--light {
  background: #fff;
  color: var(--color-primary);
}

.btn--light:hover {
  background: #f0f4f7;
}

.btn--sm {
  min-height: 2.25rem;
  padding: 0.4rem 0.85rem;
  font-size: var(--fs-sm);
}

.card,
.product-card {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  height: 100%;
}

.card--media {
  padding-top: 0;
  overflow: hidden;
}

.card--media > img {
  display: block;
  width: calc(100% + 2 * var(--space-5));
  max-width: none;
  margin: 0 calc(-1 * var(--space-5)) var(--space-1);
  height: 10rem;
  object-fit: cover;
}

.article-hero {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.article-hero img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 28rem;
  object-fit: cover;
}

.product-card__category {
  font-size: var(--fs-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-secondary);
  font-weight: var(--fw-semibold);
}

.product-card__rate {
  margin-top: auto;
  padding-top: var(--space-3);
}

.product-card__meta {
  font-size: var(--fs-sm);
  color: var(--color-muted);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  background: rgba(14, 124, 123, 0.12);
  color: var(--color-secondary-dark);
}

.badge--muted {
  background: #e8eef3;
  color: var(--color-muted);
}

.alert {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.alert--info {
  border-color: #b2ccff;
  background: #eff4ff;
}

.alert--warning {
  border-color: #f5d58a;
  background: #fff8e8;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-5);
}

.tabs__btn {
  padding: 0.75rem 1rem;
  border-bottom: 2px solid transparent;
  font-weight: var(--fw-semibold);
  color: var(--color-muted);
}

.tabs__btn[aria-selected="true"] {
  color: var(--color-primary);
  border-bottom-color: var(--color-secondary);
}

.tabs__panel[hidden] {
  display: none;
}

.accordion {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.accordion__item + .accordion__item {
  border-top: 1px solid var(--color-border);
}

.accordion__trigger {
  width: 100%;
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 1rem 1.15rem;
  text-align: left;
  font-weight: var(--fw-semibold);
  color: var(--color-primary);
  background: #fff;
}

.accordion__trigger[aria-expanded="true"] {
  background: var(--color-surface);
}

.accordion__panel {
  padding: 0 1.15rem 1.15rem;
  color: var(--color-muted);
}

.accordion__panel[hidden] {
  display: none;
}

.modal {
  border: none;
  border-radius: var(--radius-xl);
  padding: 0;
  width: min(92vw, 32rem);
  box-shadow: var(--shadow-lg);
}

.modal::backdrop {
  background: rgba(7, 28, 48, 0.55);
}

.modal__body {
  padding: var(--space-5);
}

.skeleton {
  background: linear-gradient(90deg, #e8eef3 25%, #f5f8fa 37%, #e8eef3 63%);
  background-size: 400% 100%;
  animation: skeleton 1.4s ease infinite;
  border-radius: var(--radius-md);
  min-height: 1rem;
}

@keyframes skeleton {
  0% {
    background-position: 100% 0;
  }
  100% {
    background-position: 0 0;
  }
}

.toast-region {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  z-index: var(--z-toast);
  display: grid;
  gap: var(--space-2);
}

.toast {
  background: var(--color-primary);
  color: #fff;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  font-size: var(--fs-sm);
}

.pagination {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.pagination a,
.pagination span {
  min-width: 2.5rem;
  height: 2.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
}