body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #ffeeee 25%, #dce2ff 75%);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}
h1 {
    color: #333;
    margin: 20px 0;
    font-size: 24px;
    text-align: center;
}
.gallery-container {
    display: grid;
    gap: 10px;
    padding: 20px;
    width: 100%;
    max-width: 1200px;
    box-sizing: border-box;
}

/* Media queries for responsive padding */
@media (max-width: 1199px) {
    .gallery-container {
        padding-left: 40px;
        padding-right: 40px;
    }
}
@media (max-width: 991px) {
    .gallery-container {
        padding-left: 30px;
        padding-right: 30px;
    }
}
@media (max-width: 767px) {
    .gallery-container {
        padding-left: 20px;
        padding-right: 20px;
    }
}

.responsive-img {
    width: 100%;
    height: auto;
    border: 2px solid #ddd;
    border-radius: 5px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.5s ease-in-out, transform 0.2s;
}
.responsive-img.loaded {
    opacity: 1;
}
.responsive-img:hover {
    transform: scale(1.05);
}

/* Media queries for responsive columns */
@media (min-width: 1200px) {
    .gallery-container {
        grid-template-columns: repeat(4, 1fr);
    }
}
@media (min-width: 992px) and (max-width: 1199px) {
    .gallery-container {
        grid-template-columns: repeat(3, 1fr);
    }
}
@media (min-width: 768px) and (max-width: 991px) {
    .gallery-container {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 767px) {
    .gallery-container {
        grid-template-columns: 1fr;
    }
}