h1, h2, h3 {
  font-family: var(--font-serif);
  line-height: 1.35;
  margin: 0 0 0.75rem;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.375rem; }

.btn {
  display: inline-block;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 0.9375rem;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: inherit;
}

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

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

.btn--secondary {
  background: var(--color-surface);
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn--secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn--sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
}

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

.btn--ghost:hover {
  border-color: var(--color-danger);
  color: var(--color-danger);
  background: #fef2f2;
}

.btn--block {
  display: block;
  width: 100%;
  text-align: center;
}

.back-link {
  display: inline-block;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

.form-section {
  margin-bottom: 2rem;
}

.form-section h2 {
  font-size: 1.125rem;
  margin: 0 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.table-wrap {
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.inline-form {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.inline-form input[type="number"] {
  width: 4rem;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font: inherit;
}

.coupon-form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: end;
  margin: 1rem 0;
}

.coupon-form input[type="text"] {
  flex: 1;
  min-width: 10rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font: inherit;
}

.pagination-summary {
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-muted);
  margin: 1.5rem 0 0.5rem;
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.35rem;
  margin: 0.5rem 0 1.5rem;
}

.pagination__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.25rem;
  padding: 0.4rem 0.65rem;
  text-decoration: none;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius);
  color: var(--color-text);
  font-size: 0.875rem;
}

.pagination__link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.pagination__link--current {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  pointer-events: none;
}

.pagination__link--disabled {
  background: #f1f5f9;
  color: var(--color-muted);
  pointer-events: none;
}

.panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.detail-list {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  column-gap: 0.75rem;
  row-gap: 0.5rem;
  align-items: start;
  margin: 0;
}

.detail-list dt {
  margin: 0;
  white-space: nowrap;
}

.detail-list dd {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
}

@media (min-width: 600px) {
  .detail-list {
    grid-template-columns: 8rem minmax(0, 1fr);
    column-gap: 1rem;
  }

  .detail-list dd {
    overflow-wrap: normal;
  }
}

.alert {
  padding: 0.75rem 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}

.alert--success {
  background: #ecfdf5;
  border: 1px solid #a7f3d0;
  color: #065f46;
}

.alert--error {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--color-danger);
}

.alert--warning {
  background: #eef3f8;
  border: 1px solid #c5d4e8;
  color: var(--color-text);
}

.alert__link {
  display: inline-block;
  margin-left: 0.5em;
  color: inherit;
  font-weight: 600;
}

.form-field { margin-bottom: 1rem; }

.form-field label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="password"],
.form-field input[type="number"],
.form-field input[type="tel"],
.form-field select,
.form-field textarea {
  width: 100%;
  max-width: 28rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font: inherit;
  background: #fff;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: 2px solid rgba(0, 59, 131, 0.25);
  border-color: var(--color-accent);
}

.form-field--invalid > label {
  color: var(--color-danger);
}

.form-field--invalid > input[type="text"],
.form-field--invalid > input[type="email"],
.form-field--invalid > input[type="password"],
.form-field--invalid > input[type="number"],
.form-field--invalid > input[type="tel"],
.form-field--invalid > select,
.form-field--invalid > textarea {
  border-color: var(--color-danger);
  background: #fef2f2;
  box-shadow: 0 0 0 1px var(--color-danger);
}

.form-field--invalid > input:focus,
.form-field--invalid > select:focus,
.form-field--invalid > textarea:focus {
  outline: 2px solid rgba(220, 38, 38, 0.25);
  border-color: var(--color-danger);
}

table.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  font-size: 0.9375rem;
}

table.data-table th,
table.data-table td {
  border: 1px solid var(--color-border);
  padding: 0.65rem 0.75rem;
  text-align: left;
  vertical-align: top;
}

table.data-table th {
  background: #e8eef4;
  font-weight: 600;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}

.product-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow 0.15s ease;
}

.product-card:hover { box-shadow: 0 4px 12px rgba(15, 23, 42, 0.1); }

.product-card__link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.product-card__image {
  position: relative;
  aspect-ratio: 4 / 3;
  background: #e8eef4;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-card__placeholder {
  font-size: 0.75rem;
  color: var(--color-muted);
}

.product-card__badge {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: var(--color-muted);
  color: #fff;
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}

.product-card__name {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0;
  padding: 0.75rem 0.75rem 0.25rem;
  line-height: 1.4;
}

.product-card__price {
  margin: 0;
  padding: 0 0.75rem 0.75rem;
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 600;
}

.product-card__tax {
  font-weight: 400;
  color: var(--color-muted);
  font-size: 0.75rem;
}

.category-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.category-list--sub {
  margin: 0.5rem 0 2rem;
}

.category-list--sub + .product-grid {
  margin-top: 0.25rem;
}

.page-header + .product-grid {
  margin-top: 0.5rem;
}

.category-chip {
  display: inline-block;
  padding: 0.4rem 0.9rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  text-decoration: none;
  color: var(--color-text);
  font-size: 0.875rem;
}

.category-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

nav[aria-label="Pagination Navigation"] {
  margin-top: 1.5rem;
  font-size: 0.875rem;
}

nav[aria-label="Pagination Navigation"] svg {
  width: 1.25rem;
  height: 1.25rem;
  vertical-align: middle;
}

nav[aria-label="Pagination Navigation"] a,
nav[aria-label="Pagination Navigation"] span {
  display: inline-block;
  padding: 0.25rem 0.5rem;
  text-decoration: none;
  color: inherit;
}

nav[aria-label="Pagination Navigation"] a:hover {
  text-decoration: underline;
}

.input-error {
  margin: 0.25rem 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.875rem;
  color: var(--color-danger);
}

.input-error li + li {
  margin-top: 0.15rem;
}

@media (max-width: 600px) {
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
}