* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    display: grid;
    place-items: center;
    min-height: 100vh;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f4f5f7;
}

.main-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 1200px;
}

.col-1 {
    flex: 1 1 120px;
    display: flex;
    justify-content: center;
}

.items {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.item {
    border-radius: 12px;
    cursor: pointer;
    background-color: #fff;
    padding: 0.3rem;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.item img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 8px;
    display: block;
}

.item:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.item.active {
    border: 2px solid #0077ff;
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.25);
}

.col-2 {
    flex: 4 1 300px;
    display: flex;
    justify-content: center;
    position: relative;
}

.carousel {
    position: relative;
    overflow: hidden;
    width: 100%;
    max-width: 600px;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
    background: #fff;
}

.slides-container {
    display: flex;
    transition: transform 0.5s ease-in-out;
}

.slide {
    flex-shrink: 0;
    width: 100%;
}

.slide img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 15px;
    transition: transform 0.3s ease;
}

.slide img:hover {
    transform: scale(1.03);
}

#nextBtn,
#prevBtn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.6rem;
    background: linear-gradient(145deg, #ffffff, #e0e0e0);
    border: none;
    font-size: 1.7rem;
    cursor: pointer;
    z-index: 2;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    transition: background 0.3s ease, transform 0.2s ease;
}

#nextBtn:hover,
#prevBtn:hover {
    background: linear-gradient(145deg, #0077ff, #005fcc);
    color: #fff;
    transform: scale(1.1);
}

#nextBtn {
    right: 10px;
}

#prevBtn {
    left: 10px;
}

@media (max-width: 768px) {
    .main-container {
        flex-direction: column;
    }

    .col-1 {
        flex-direction: row;
    }

    .item img {
        width: 60px;
        height: 60px;
    }

    .carousel {
        max-width: 90%;
    }
}