* {
    box-sizing: content-box;
    font-family: 'Source Code Pro';
}

.container {
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 3rem;
}

.gallery {
    padding-top: 20px;
    column-count: 1;
    column-gap: 1.25rem;
    width: 100%;
}

@media (min-width: 640px) {
    .gallery {
        column-count: 2;
    }
}

@media (min-width: 1024px) {
    .gallery {
        column-count: 3;
    }
}

@media (min-width: 1280px) {
    .gallery {
        column-count: 4;
    }
}

.gallery-item {
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1.25rem;
    break-inside: avoid;
    display: inline-block;
    width: 100%;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.gallery-item img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: cover;
}