.mainn-video-slider {
    width: 100%;
    position: relative;
    padding: 30px 0;
}

.mainn-video-slider .swiper-slide {
    position: relative;
    overflow: hidden;
    cursor: pointer;
    /* Ratio 6:19 */
    aspect-ratio: 9 / 16; 
    background: #111;
    border-radius: 12px;
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.mainn-video-slider .swiper-slide:hover {
    transform: translateY(-5px);
}

.mainn-video-slider .slide-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease, filter 0.4s ease;
}

.mainn-video-slider .swiper-slide:hover .slide-thumbnail {
    transform: scale(1.1);
    filter: brightness(0.8);
}

/* Premium Play Button Overlay */
.mainn-video-slider .video-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(0,0,0,0.4), transparent);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    transition: all 0.4s ease;
}

.mainn-video-slider .play-icon {
    width: 65px;
    height: 65px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1.5px solid rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 22px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 0 20px rgba(0,0,0,0.2);
}

/* Biểu tượng tam giác play hiệu ứng Glassmorphism */
.mainn-video-slider .play-icon i {
    margin-left: 4px; /* Căn giữa quang học cho tam giác */
    filter: drop-shadow(0 0 5px rgba(255,255,255,0.3));
}

.mainn-video-slider .swiper-slide:hover .play-icon {
    background: linear-gradient(to right, #378AF6, #0CC8F8);
    color: #fff;
    transform: scale(1.15);
    border-color: transparent;
    box-shadow: 0 0 40px rgba(55, 138, 246, 0.4);
}

/* Sóng rung (Pulse effect) khi hover */
.mainn-video-slider .swiper-slide:hover .play-icon::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid #378AF6;
    border-radius: 50%;
    animation: mainn-pulse 1.5s infinite;
}

@keyframes mainn-pulse {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.8); opacity: 0; }
}

.mainn-video-slider .video-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 3;
    display: none; 
    background: #000;
}

.mainn-video-slider .video-container iframe,
.mainn-video-slider .video-container video {
    width: 100%;
    height: 100%;
    border: none;
}

.mainn-video-slider .swiper-slide.is-playing .video-container {
    display: block;
}

.mainn-video-slider .swiper-slide.is-playing .video-overlay {
    display: none;
}

.mainn-video-slider .swiper-container-relative {
    position: relative;
    padding: 0 60px 40px 60px; /* Thêm khoảng trống hai bên cho arrow và dưới cho dot */
}

/* Swiper Navigation & Pagination Premium Look - Đẩy ra ngoài */
.mainn-video-slider .swiper-button-next,
.mainn-video-slider .swiper-button-prev {
    color: #333;
    background: #fff;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    top: 50%;
    transform: translateY(-50%);
    margin: 0;
}

.mainn-video-slider .swiper-button-prev {
    left: 0;
}

.mainn-video-slider .swiper-button-next {
    right: 0;
}

.mainn-video-slider .swiper-button-next:after,
.mainn-video-slider .swiper-button-prev:after {
    font-size: 16px;
    font-weight: bold;
}

.mainn-video-slider .swiper-button-next:hover,
.mainn-video-slider .swiper-button-prev:hover {
    background: linear-gradient(to right, #378AF6, #0CC8F8);
    color: #fff;
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 16px rgba(55, 138, 246, 0.3);
}

.mainn-video-slider .swiper-pagination {
    bottom: 0 !important;
}

.mainn-video-slider .swiper-pagination-bullet {
    background: #ccc;
    opacity: 1;
    margin: 0 5px !important;
}

.mainn-video-slider .swiper-pagination-bullet-active {
    background: linear-gradient(to right, #378AF6, #0CC8F8);
    width: 25px;
    border-radius: 5px;
    transition: width 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    .mainn-video-slider .swiper-container-relative {
        padding: 0 0 40px 0; /* Mobile ẩn arrow, chỉ để dot */
    }
    .mainn-video-slider .swiper-button-next,
    .mainn-video-slider .swiper-button-prev {
        display: none; /* Ẩn mũi tên trên mobile để tránh chật chội */
    }
    .mainn-video-slider .swiper-slide {
        aspect-ratio: 9 / 16;
    }
    .mainn-video-slider .play-icon {
        width: 50px;
        height: 50px;
        font-size: 18px;
    }
}