/**
 * Post Slider Component Styles
 *
 * Follows BEM methodology and uses CSS custom properties.
 * Implements accessibility features and prevents CLS.
 *
 * @package Devmulti
 * @since 2.0.0
 */

/* ============================================
   CSS Variables
   ============================================ */
:root {
    --slider-gap: 2rem;
    --slider-nav-size: 48px;
    --slider-nav-bg: rgba(255, 255, 255, 0.9);
    --slider-nav-color: #4f8abe;
    --slider-pagination-color: #4f8abe;
    --slider-card-radius: 15px;
    --slider-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Wrapper
   ============================================ */
.post-slider-wrapper {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

/* ============================================
   Slider Container
   ============================================ */
.post-slider {
    overflow: hidden;
    border-radius: var(--slider-card-radius);
}

/* ============================================
   Slide Item
   ============================================ */
.post-slider__item {
    height: auto;
}

/* ============================================
   Card
   ============================================ */
.post-slider__card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: #fff;
    border-radius: var(--slider-card-radius);
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform var(--slider-transition), box-shadow var(--slider-transition);
}

.post-slider__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

/* ============================================
   Image
   ============================================ */
.post-slider__image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    /* Prevents CLS */
    overflow: hidden;
    background: #f0f0f0;
}

.post-slider__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--slider-transition);
}

.post-slider__card:hover .post-slider__image {
    transform: scale(1.05);
}

/* ============================================
   Content
   ============================================ */
.post-slider__content {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 1.5rem;
}

.post-slider__header {
    margin-bottom: 1rem;
}

.post-slider__title {
    margin: 0 0 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.3;
    color: #333;
}

.post-slider__title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--slider-transition);
}

.post-slider__title a:hover,
.post-slider__title a:focus {
    color: var(--slider-nav-color);
    outline: 2px solid var(--slider-nav-color);
    outline-offset: 2px;
}

.post-slider__meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: #666;
}

.post-slider__excerpt {
    flex: 1;
    margin-bottom: 1rem;
    color: #555;
    line-height: 1.6;
}

.post-slider__footer {
    margin-top: auto;
}

.post-slider__link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--slider-nav-color);
    color: #fff;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    transition: all var(--slider-transition);
}

.post-slider__link:hover,
.post-slider__link:focus {
    background: #3a7aaa;
    transform: translateX(5px);
    outline: 2px solid var(--slider-nav-color);
    outline-offset: 2px;
}

/* ============================================
   Navigation Buttons
   ============================================ */
.post-slider__nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: var(--slider-nav-size);
    height: var(--slider-nav-size);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--slider-nav-bg);
    border: 2px solid var(--slider-nav-color);
    border-radius: 50%;
    color: var(--slider-nav-color);
    cursor: pointer;
    transition: all var(--slider-transition);
    backdrop-filter: blur(10px);
}

.post-slider__nav:hover,
.post-slider__nav:focus {
    background: var(--slider-nav-color);
    color: #fff;
    transform: translateY(-50%) scale(1.1);
}

.post-slider__nav:focus {
    outline: 2px solid var(--slider-nav-color);
    outline-offset: 4px;
}

.post-slider__nav--prev {
    left: 1rem;
}

.post-slider__nav--next {
    right: 1rem;
}

.post-slider__nav.swiper-button-disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* ============================================
   Pagination
   ============================================ */
.post-slider__pagination {
    position: relative;
    margin-top: 2rem;
    text-align: center;
}

.post-slider__pagination .swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background: #ccc;
    opacity: 1;
    transition: all var(--slider-transition);
    border: none;
    cursor: pointer;
}

.post-slider__pagination .swiper-pagination-bullet:hover,
.post-slider__pagination .swiper-pagination-bullet:focus {
    background: var(--slider-pagination-color);
    outline: 2px solid var(--slider-pagination-color);
    outline-offset: 2px;
}

.post-slider__pagination .swiper-pagination-bullet-active {
    background: var(--slider-pagination-color);
    width: 32px;
    border-radius: 6px;
}

/* ============================================
   Screen Reader Only
   ============================================ */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .post-slider__nav {
        width: 40px;
        height: 40px;
    }

    .post-slider__nav--prev {
        left: 0.5rem;
    }

    .post-slider__nav--next {
        right: 0.5rem;
    }

    .post-slider__title {
        font-size: 1.25rem;
    }

    .post-slider__content {
        padding: 1rem;
    }
}

/* ============================================
   Accessibility: Reduced Motion
   ============================================ */
@media (prefers-reduced-motion: reduce) {

    .post-slider__card,
    .post-slider__image,
    .post-slider__link,
    .post-slider__nav,
    .post-slider__pagination .swiper-pagination-bullet {
        transition: none;
    }

    .swiper {
        --swiper-transition-duration: 0ms;
    }
}

/* ============================================
   High Contrast Mode Support
   ============================================ */
@media (prefers-contrast: high) {
    .post-slider__nav {
        border-width: 3px;
    }

    .post-slider__title a:focus,
    .post-slider__link:focus,
    .post-slider__nav:focus {
        outline-width: 3px;
    }
}