/* ==========================================================================
   ThorDrone DJI-Style Theme — Component Styles
   Text links, clean buttons, minimal product cards, spec table, breadcrumb,
   pagination, grids, filter chips, toolbar, and shared components.
   All tokens are --td-* (see DJI-Style-Design-Spec.md).
   ========================================================================== */

/* --------------------------------------------------------------------------
   Text Link (replaces military buttons)
   -------------------------------------------------------------------------- */
.td-link {
    display: inline-flex;
    align-items: center;
    gap: var(--td-space-1);
    font-family: var(--td-font-body);
    font-size: var(--td-fs-body);
    font-weight: var(--td-fw-medium);
    color: var(--td-text-primary);
    cursor: pointer;
    transition: color var(--td-duration-base) var(--td-ease);
}

.td-link--inverse {
    color: var(--td-text-inverse);
}

.td-link__arrow {
    display: inline-block;
    transition: transform var(--td-duration-fast) var(--td-ease);
}

.td-link:hover .td-link__arrow {
    transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   Buttons (clean monochrome, no glow)
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--td-space-1);
    font-family: var(--td-font-body);
    font-weight: var(--td-fw-semibold);
    font-size: 14px;
    letter-spacing: 0.01em;
    padding: 12px 28px;
    border: 1px solid transparent;
    border-radius: var(--td-radius-sm);
    cursor: pointer;
    transition: background var(--td-duration-base) var(--td-ease),
                color var(--td-duration-base) var(--td-ease),
                border-color var(--td-duration-base) var(--td-ease);
    text-decoration: none;
    line-height: 1;
}

.btn-primary {
    background: var(--td-bg-dark);
    color: var(--td-text-inverse);
    border-color: var(--td-bg-dark);
}

.btn-primary:hover {
    background: #000000;
    color: var(--td-text-inverse);
}

.btn-secondary {
    background: transparent;
    color: var(--td-text-primary);
    border-color: var(--td-border);
}

.btn-secondary:hover {
    border-color: var(--td-text-primary);
    color: var(--td-text-primary);
}

.btn--sm { padding: 8px 16px; font-size: 12px; }
.btn--lg { padding: 16px 36px; font-size: 16px; }
.btn--block { display: flex; width: 100%; }

.btn__arrow {
    display: inline-block;
    margin-left: var(--td-space-1);
    transition: transform var(--td-duration-base) var(--td-ease);
}

.btn:hover .btn__arrow {
    transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   Product Card (DJI minimal: white, no badge, cover image, hover shadow)
   -------------------------------------------------------------------------- */
.product-card {
    background: var(--td-bg-primary);
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius-none);
    display: flex;
    flex-direction: column;
    transition: box-shadow var(--td-duration-base) var(--td-ease),
                border-color var(--td-duration-base) var(--td-ease);
    height: 100%;
    overflow: hidden;
}

.product-card:hover {
    box-shadow: var(--td-shadow-sm);
    border-color: var(--td-border);
}

.product-card__image-wrap {
    position: relative;
    background: var(--td-bg-secondary);
    aspect-ratio: 4 / 3;
    overflow: hidden;
    display: block;
}

.product-card__image-link {
    display: block;
    height: 100%;
}

.product-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--td-duration-slow) var(--td-ease);
}

.product-card:hover .product-card__image {
    transform: scale(1.03);
}

.product-card__body {
    padding: var(--td-space-3);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card__title {
    font-family: var(--td-font-body);
    font-size: 16px;
    font-weight: var(--td-fw-semibold);
    color: var(--td-text-primary);
    margin-bottom: var(--td-space-1);
    line-height: var(--td-lh-snug);
}

.product-card__title a {
    color: inherit;
}

.product-card__title a:hover {
    color: var(--td-accent);
}

.product-card__desc {
    color: var(--td-text-secondary);
    font-size: 14px;
    line-height: var(--td-lh-normal);
    margin-bottom: var(--td-space-2);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card__specs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--td-space-2);
    margin-bottom: var(--td-space-3);
    margin-top: auto;
}

.product-card__spec {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.product-card__spec-label {
    font-family: var(--td-font-body);
    font-size: 10px;
    font-weight: var(--td-fw-medium);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--td-text-tertiary);
}

.product-card__spec-value {
    font-family: var(--td-font-mono);
    font-size: 12px;
    font-weight: var(--td-fw-medium);
    color: var(--td-text-primary);
}

.product-card__footer {
    border-top: 1px solid var(--td-border);
    padding: var(--td-space-2) var(--td-space-3);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-card__price {
    font-family: var(--td-font-body);
    font-size: 16px;
    font-weight: var(--td-fw-bold);
    color: var(--td-text-primary);
}

.product-card__moq {
    font-size: 12px;
    color: var(--td-text-secondary);
}

.product-card__moq-label {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--td-text-tertiary);
}

/* --------------------------------------------------------------------------
   Category Card
   -------------------------------------------------------------------------- */
.category-card {
    background: var(--td-bg-primary);
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius-none);
    padding: var(--td-space-4);
    display: flex;
    flex-direction: column;
    gap: var(--td-space-3);
    transition: box-shadow var(--td-duration-base) var(--td-ease);
    height: 100%;
    position: relative;
    overflow: hidden;
}

.category-card:hover {
    box-shadow: var(--td-shadow-sm);
}

.category-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--td-space-3);
}

.category-card__icon {
    width: 48px;
    height: 48px;
    background: var(--td-bg-secondary);
    border: 1px solid var(--td-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--td-text-secondary);
    flex-shrink: 0;
}

.category-card__icon svg {
    width: 24px;
    height: 24px;
}

.category-card__count {
    font-family: var(--td-font-mono);
    font-size: 11px;
    color: var(--td-text-tertiary);
    background: var(--td-bg-secondary);
    padding: 4px 10px;
    border-radius: var(--td-radius-sm);
    white-space: nowrap;
}

.category-card__name {
    font-family: var(--td-font-display);
    font-size: 20px;
    font-weight: var(--td-fw-semibold);
    color: var(--td-text-primary);
    line-height: var(--td-lh-snug);
}

.category-card__name-cn {
    font-size: 13px;
    color: var(--td-text-secondary);
    margin-top: 2px;
}

.category-card__desc {
    color: var(--td-text-secondary);
    font-size: 13px;
    line-height: var(--td-lh-normal);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.category-card__subs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--td-space-1);
}

.category-card__sub {
    font-size: 11px;
    color: var(--td-text-secondary);
    background: var(--td-bg-secondary);
    border: 1px solid var(--td-border);
    padding: 3px 8px;
    border-radius: var(--td-radius-sm);
}

.category-card__more {
    font-size: 11px;
    color: var(--td-text-tertiary);
    padding: 3px 8px;
}

.category-card__browse {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: var(--td-space-1);
    color: var(--td-text-primary);
    font-family: var(--td-font-body);
    font-size: 13px;
    font-weight: var(--td-fw-medium);
    opacity: 0;
    transform: translateX(-8px);
    transition: all var(--td-duration-base) var(--td-ease);
}

.category-card:hover .category-card__browse {
    opacity: 1;
    transform: translateX(0);
}

.category-card__browse-arrow {
    display: inline-block;
}

/* --------------------------------------------------------------------------
   Spec Table
   -------------------------------------------------------------------------- */
.spec-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--td-border);
}

.spec-table tr {
    border-bottom: 1px solid var(--td-border);
}

.spec-table tr:last-child {
    border-bottom: none;
}

.spec-table tr:nth-child(even) {
    background: var(--td-bg-secondary);
}

.spec-table tr:nth-child(odd) {
    background: var(--td-bg-primary);
}

.spec-table td {
    padding: 12px 16px;
    font-size: 14px;
    vertical-align: top;
}

.spec-table td:first-child {
    color: var(--td-text-secondary);
    width: 40%;
    font-family: var(--td-font-body);
    font-size: 13px;
    letter-spacing: 0.02em;
}

.spec-table td:last-child {
    color: var(--td-text-primary);
    font-family: var(--td-font-mono);
    font-size: 13px;
    font-weight: var(--td-fw-medium);
}

/* --------------------------------------------------------------------------
   Breadcrumb
   -------------------------------------------------------------------------- */
.breadcrumb {
    background: var(--td-bg-primary);
    border-bottom: 1px solid var(--td-border);
    padding: var(--td-space-2) 0;
}

.breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0;
    list-style: none;
    margin: 0;
    padding: 0;
    font-family: var(--td-font-body);
    font-size: 13px;
}

.breadcrumb__item {
    display: flex;
    align-items: center;
    gap: var(--td-space-2);
}

.breadcrumb__link {
    color: var(--td-text-secondary);
    transition: color var(--td-duration-base) var(--td-ease);
}

.breadcrumb__link:hover {
    color: var(--td-text-primary);
}

.breadcrumb__current {
    color: var(--td-text-primary);
}

.breadcrumb__separator {
    color: var(--td-text-tertiary);
    margin: 0 var(--td-space-2);
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--td-space-1);
    margin-top: var(--td-space-5);
}

.pagination__btn,
.pagination__page {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--td-space-2);
    background: var(--td-bg-primary);
    border: 1px solid var(--td-border);
    color: var(--td-text-secondary);
    font-family: var(--td-font-mono);
    font-size: 13px;
    font-weight: var(--td-fw-medium);
    transition: all var(--td-duration-base) var(--td-ease);
    text-decoration: none;
}

.pagination__btn:hover,
.pagination__page:hover {
    border-color: var(--td-text-primary);
    color: var(--td-text-primary);
    background: var(--td-bg-secondary);
}

.pagination__page.is-current {
    background: var(--td-bg-dark);
    border-color: var(--td-bg-dark);
    color: var(--td-text-inverse);
}

.pagination__btn.is-disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.pagination__ellipsis {
    color: var(--td-text-tertiary);
    padding: 0 var(--td-space-1);
    font-family: var(--td-font-mono);
}

/* --------------------------------------------------------------------------
   Product Grid
   -------------------------------------------------------------------------- */
.product-grid {
    display: grid;
    gap: var(--td-grid-gap);
}

.product-grid--4col { grid-template-columns: repeat(4, 1fr); }
.product-grid--3col { grid-template-columns: repeat(3, 1fr); }
.product-grid--2col { grid-template-columns: repeat(2, 1fr); }

/* --------------------------------------------------------------------------
   Category Grid
   -------------------------------------------------------------------------- */
.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--td-grid-gap);
}

/* --------------------------------------------------------------------------
   Filter Chips
   -------------------------------------------------------------------------- */
.filter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--td-space-2);
    margin-bottom: var(--td-space-4);
}

.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--td-space-1);
    padding: 8px 16px;
    background: var(--td-bg-primary);
    border: 1px solid var(--td-border);
    color: var(--td-text-secondary);
    font-size: 13px;
    font-weight: var(--td-fw-medium);
    cursor: pointer;
    transition: all var(--td-duration-base) var(--td-ease);
    text-decoration: none;
}

.filter-chip:hover {
    border-color: var(--td-text-primary);
    color: var(--td-text-primary);
}

.filter-chip.is-active {
    background: var(--td-bg-dark);
    border-color: var(--td-bg-dark);
    color: var(--td-text-inverse);
}

/* --------------------------------------------------------------------------
   Toolbar
   -------------------------------------------------------------------------- */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--td-space-3);
    margin-bottom: var(--td-space-4);
    padding-bottom: var(--td-space-3);
    border-bottom: 1px solid var(--td-border);
}

.toolbar__count {
    font-size: 13px;
    color: var(--td-text-secondary);
}

.toolbar__count strong {
    color: var(--td-text-primary);
}

.toolbar__right {
    display: flex;
    align-items: center;
    gap: var(--td-space-3);
}

.toolbar__sort {
    display: flex;
    align-items: center;
    gap: var(--td-space-2);
}

.toolbar__sort-label {
    font-size: 12px;
    color: var(--td-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --------------------------------------------------------------------------
   No Results
   -------------------------------------------------------------------------- */
.no-results {
    text-align: center;
    padding: var(--td-space-8) var(--td-space-3);
}

.no-results h1 {
    margin-bottom: var(--td-space-3);
}

.no-results p {
    color: var(--td-text-secondary);
    margin-bottom: var(--td-space-4);
    max-width: 500px;
    margin-inline: auto;
}

/* --------------------------------------------------------------------------
   Page Header
   -------------------------------------------------------------------------- */
.page-header {
    padding: var(--td-space-5) 0;
    border-bottom: 1px solid var(--td-border);
    margin-bottom: var(--td-space-5);
}

.page-title {
    margin-bottom: var(--td-space-2);
}

.page-description {
    color: var(--td-text-secondary);
    font-size: 15px;
    max-width: 700px;
}

/* --------------------------------------------------------------------------
   Features List
   -------------------------------------------------------------------------- */
.features-list {
    display: flex;
    flex-direction: column;
    gap: var(--td-space-2);
    list-style: none;
    padding: 0;
    margin: 0;
}

.features-list__item {
    display: flex;
    align-items: flex-start;
    gap: var(--td-space-2);
    color: var(--td-text-primary);
    font-size: 14px;
    line-height: var(--td-lh-normal);
}

.features-list__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--td-text-secondary);
    margin-top: 2px;
}

.features-list__icon svg {
    width: 100%;
    height: 100%;
}

/* --------------------------------------------------------------------------
   Search Form
   -------------------------------------------------------------------------- */
.search-form {
    display: flex;
    align-items: center;
    background: var(--td-bg-primary);
    border: 1px solid var(--td-border);
    border-radius: var(--td-radius-sm);
    transition: border-color var(--td-duration-base) var(--td-ease);
}

.search-form:focus-within {
    border-color: var(--td-text-primary);
}

.search-form__input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--td-text-primary);
    font-family: var(--td-font-body);
    font-size: 13px;
    padding: 8px 12px;
    width: 180px;
}

.search-form__input::placeholder {
    color: var(--td-text-tertiary);
}

.search-form__submit {
    background: transparent;
    border: none;
    border-left: 1px solid var(--td-border);
    color: var(--td-text-secondary);
    padding: 8px 12px;
    cursor: pointer;
    transition: color var(--td-duration-base) var(--td-ease);
}

.search-form__submit:hover {
    color: var(--td-text-primary);
}