/**
 * T2W Carousel Component — UX-BLUEPRINT §5.3
 * Unified horizontal scroll pattern
 * Used by: places, restaurants, products, itineraries, guides
 */

/* ========================================
   Container
   ======================================== */
.t2w-carousel {
    position: relative;
}

/* ========================================
   Track — horizontal scroll area
   ======================================== */
.t2w-carousel__track {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    padding: 8px 4px 16px;
}

/* Hide scrollbar */
.t2w-carousel__track::-webkit-scrollbar {
    display: none;
}

.t2w-carousel__track {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* Items snap */
.t2w-carousel__track > * {
    scroll-snap-align: start;
    flex-shrink: 0;
}

/* ========================================
   Arrows — prev/next navigation
   ======================================== */
.t2w-carousel__arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-white, #fff);
    border: 1px solid var(--color-border-light, #E5E7EB);
    box-shadow: 0 2px 8px rgba(0,0,0,0.10);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: opacity 200ms, transform 200ms, box-shadow 200ms;
    color: var(--color-text-primary, #1F2937);
}

.t2w-carousel__arrow:hover {
    transform: translateY(-50%) scale(1.08);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.t2w-carousel__arrow--prev {
    left: -8px;
}

.t2w-carousel__arrow--next {
    right: -8px;
}

/* Desktop: arrows hidden until hover */
@media (hover: hover) {
    .t2w-carousel__arrow {
        opacity: 0;
    }

    .t2w-carousel:hover .t2w-carousel__arrow {
        opacity: 1;
    }
}

/* Hidden at start/end (JS toggles these) */
.t2w-carousel__arrow[hidden] {
    display: none;
}

/* ========================================
   Edge gradients — scroll hint
   ======================================== */
.t2w-carousel::before,
.t2w-carousel::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 48px;
    z-index: 2;
    pointer-events: none;
    opacity: 0;
    transition: opacity 200ms;
}

.t2w-carousel::before {
    left: 0;
    background: linear-gradient(to right, var(--color-white, #fff), transparent);
}

.t2w-carousel::after {
    right: 0;
    background: linear-gradient(to left, var(--color-white, #fff), transparent);
}

/* JS adds these classes based on scroll position */
.t2w-carousel--scrolled-start::before {
    opacity: 0;
}

.t2w-carousel--scrolled-middle::before,
.t2w-carousel--scrolled-middle::after {
    opacity: 1;
}

.t2w-carousel--scrolled-end::after {
    opacity: 0;
}

/* ========================================
   Dot indicators (optional)
   ======================================== */
.t2w-carousel__dots {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 12px;
}

.t2w-carousel__dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-border-medium, #D1D5DB);
    border: none;
    padding: 0;
    cursor: pointer;
    transition: background 200ms, width 200ms;
}

.t2w-carousel__dot--active {
    background: var(--color-primary, #FFB700);
    width: 24px;
    border-radius: var(--radius-full, 9999px);
}

/* ========================================
   Section header (title + "전체 보기" link)
   ======================================== */
.t2w-carousel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding: 0 4px;
}

.t2w-carousel__title {
    font-size: var(--text-xl, 1.25rem);
    font-weight: var(--font-bold, 700);
    color: var(--color-text-primary, #1F2937);
    margin: 0;
}

.t2w-carousel__link {
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-medium, 500);
    color: var(--color-text-muted, #6B7280);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color 150ms;
}

.t2w-carousel__link:hover {
    color: var(--color-primary, #FFB700);
}

/* ========================================
   Tab filters above carousel
   ======================================== */
.t2w-carousel__tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-bottom: 16px;
    padding: 0 4px;
}

.t2w-carousel__tabs::-webkit-scrollbar {
    display: none;
}

.t2w-carousel__tab {
    padding: 8px 16px;
    border-radius: var(--radius-full, 9999px);
    font-size: var(--text-sm, 0.875rem);
    font-weight: var(--font-medium, 500);
    white-space: nowrap;
    cursor: pointer;
    border: 1.5px solid var(--color-border-light, #E5E7EB);
    background: transparent;
    color: var(--color-text-secondary, #4B5563);
    transition: background 150ms, color 150ms, border-color 150ms;
}

.t2w-carousel__tab:hover {
    border-color: var(--color-primary, #FFB700);
    color: var(--color-primary, #FFB700);
}

.t2w-carousel__tab--active {
    background: var(--color-text-primary, #1F2937);
    color: var(--color-white, #fff);
    border-color: var(--color-text-primary, #1F2937);
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
    .t2w-carousel__arrow {
        opacity: 0.8;
        width: 36px;
        height: 36px;
    }

    .t2w-carousel__track {
        gap: 12px;
        padding: 4px 2px 12px;
    }

    .t2w-carousel__title {
        font-size: var(--text-lg, 1.125rem);
    }

    .t2w-carousel__tab {
        padding: 6px 14px;
        font-size: var(--text-xs, 0.75rem);
    }
}