/* =============================================================
   PRODUCTS PAGE — products.css
   ============================================================= */

/* ---- Hero banner ---- */
.products-hero {
    position: relative;
    height: 80vh;
    min-height: 420px;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
}

.products-hero__bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.products-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(10, 20, 60, .65) 0%, rgba(10, 20, 60, .2) 100%);
    z-index: 1;
}

.products-hero__title {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    z-index: 2;
    max-width: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
    font-size: clamp(var(--font-size-2xl), 5vw, var(--font-size-4xl));
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
}

.products-hero__content {
    position: relative;
    z-index: 2;
    width: 100%;
}

/* ---- Product line tabs (hero bottom) ---- */
.line-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.line-tab {
    padding: var(--space-4) var(--space-8);
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
    white-space: nowrap;
}

.line-tab:hover {
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.08);
}

.line-tab.is-active {
    color: var(--color-white);
    font-weight: var(--font-weight-semibold);
}

/* ---- Secondary category tab bar ---- */
.category-bar {
    margin-top: 40px;
    background: var(--color-white);
    top: 72px;
    z-index: calc(var(--z-header) - 1);
}

.category-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: nowrap;
    gap: 0;
    padding: 0;
    width: 100%;
}

.category-tab {
    padding: var(--space-4) var(--space-4);
    background: transparent;
    border: 1px solid #eee;
    color: var(--color-primary);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
    white-space: nowrap;
    line-height: 1;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.category-tab:hover {
    color: var(--color-primary);
    background: var(--color-gray-50);
}

.category-tab.is-active {
    color: var(--color-white);
    background: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

/* ---- Category Detail Section ---- */
.category-detail {
    padding-block: var(--space-16);
    background: var(--color-white);
}

.category-detail__header {
    margin-bottom: var(--space-10);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.category-detail__title {
    font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-3xl));
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.category-detail__desc {
    font-size: var(--font-size-md);
    color: var(--color-gray-600);
    line-height: var(--line-height-loose);
}

/* ---- Hotspot Image ---- */
.hotspot-image-wrap {
    position: relative;
    width: 100%;
    user-select: none;
}

.hotspot-image-wrap img {
    width: 100%;
    display: block;
    border-radius: var(--radius-lg);
}

.hotspot-marker {
    position: absolute;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.hotspot-marker__btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-accent-red);
    border: 3px solid var(--color-white);
    box-shadow: 0 0 0 2px var(--color-accent-red), var(--shadow-md);
    cursor: pointer;
    position: relative;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hotspot-marker__btn::before {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 2px solid var(--color-accent-red);
    opacity: .4;
    animation: hotspot-pulse 2s ease-out infinite;
}

@keyframes hotspot-pulse {
    0% {
        transform: scale(.8);
        opacity: .5;
    }

    70% {
        transform: scale(1.4);
        opacity: 0;
    }

    100% {
        transform: scale(1.4);
        opacity: 0;
    }
}

.hotspot-marker:hover .hotspot-marker__btn,
.hotspot-marker.is-active .hotspot-marker__btn {
    transform: scale(1.2);
    box-shadow: 0 0 0 3px var(--color-accent-red), var(--shadow-lg);
}

.hotspot-marker__popup {
    position: absolute;
    bottom: calc(100% + 14px);
    left: 50%;
    width: 200px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: var(--space-3) var(--space-4);
    pointer-events: none;
    opacity: 0;
    transform: translateX(-50%) translateY(8px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    z-index: 3;
}

.hotspot-marker:hover .hotspot-marker__popup,
.hotspot-marker.is-active .hotspot-marker__popup {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.hotspot-marker__popup::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 8px solid transparent;
    border-top-color: var(--color-white);
}

.hotspot-popup__thumb {
    width: 100%;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-2);
    background: var(--color-gray-200);
}

.hotspot-popup__title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
}

.hotspot-popup__sub {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-bottom: var(--space-2);
}

.hotspot-popup__link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    text-decoration: none;
}

.hotspot-popup__link:hover {
    color: var(--color-accent-green);
}

/* ---- Parts Grid ---- */
.parts-section {
    background: var(--color-gray-100);
    padding-block: var(--space-16);
}

.parts-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
    margin-top: var(--space-8);
}

.part-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-base);
    border: 2px solid transparent;
    scroll-margin-top: 160px;
}

.part-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.part-card.is-highlighted {
    border-color: var(--color-accent-red);
    box-shadow: 0 0 0 4px rgba(230, 57, 70, .15), var(--shadow-lg);
}

.part-card__image-wrap {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--color-gray-200);
}

.part-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.part-card:hover .part-card__image {
    transform: scale(1.06);
}

.part-card__badge {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    background: var(--color-primary);
    letter-spacing: 0.05em;
}

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

.part-card__title {
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    color: var(--color-gray-900);
    margin-bottom: var(--space-1);
}

.part-card__title-en {
    font-size: var(--font-size-xs);
    color: var(--color-gray-400);
    margin-bottom: var(--space-4);
}

.part-card__specs {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-gray-100);
}

.part-card__spec {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-xs);
}

.part-card__spec-label {
    color: var(--color-gray-400);
}

.part-card__spec-value {
    color: var(--color-gray-700);
    font-weight: var(--font-weight-medium);
}

/* Loading state */
.category-detail.is-loading,
.parts-section.is-loading {
    opacity: .5;
    pointer-events: none;
}


/* ---- CTA Banner ---- */
.products-cta {
    background: var(--color-primary);
    padding-block: var(--space-16);
    text-align: center;
}

.products-cta__inner {
    max-width: 600px;
    margin-inline: auto;
}

.products-cta__title {
    font-size: clamp(var(--font-size-xl), 3vw, var(--font-size-2xl));
    font-weight: var(--font-weight-bold);
    color: var(--color-white);
    margin-bottom: var(--space-4);
}

.products-cta__desc {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: var(--space-8);
    line-height: var(--line-height-loose);
}

.products-cta__actions {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    text-decoration: none;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    border: 2px solid transparent;
}

.btn:hover {
    opacity: .88;
    transform: translateY(-1px);
}

.btn--green {
    background: #00a676;
    color: var(--color-white);
}

.btn--outline-white {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--color-white);
}

/* ---- Responsive ---- */
@media (max-width: 1200px) {
    .parts-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .parts-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .category-tab {
        height: 46px;
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 600px) {
    .line-tab {
        padding: var(--space-3) var(--space-4);
        font-size: var(--font-size-xs);
    }

    .category-tab {
        height: 42px;
        font-size: var(--font-size-xs);
    }

    .parts-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-3);
    }

    .hotspot-marker__popup {
        width: 160px;
    }
}

@media (max-width: 400px) {
    .parts-grid {
        grid-template-columns: 1fr;
    }
}