* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
    font-family: Bahnschrift, sans-serif;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100dvh;
    font-size: 1.25rem;
    color: #cbd5e1;
    background-color: #020617;
}

header {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 1.5rem;
    margin: 1rem;
    background-color: #0f172a;
    border: 3px solid #334155;
    border-radius: 1.5rem;
}

main {
    display: flex;
    flex: 1;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.box {
    position: relative;
    width: 300px;
    height: 300px;
    overflow: hidden;
    background-color: #334155;
    border-radius: 15px;
}

img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all linear 0.7s;
    position: absolute;
    inset: 0;
}

.second {
    opacity: 0;
}

.box:hover img {
    opacity: 0;
}

.box:hover .second {
    opacity: 1;
}

footer {
    display: flex;
    padding: 1.5rem;
}