body {
    font-family: sans-serif;
    color: black;
}

.grid-lg, .grid-sm {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    grid-template-rows: repeat(5, 2fr);
    grid-column-gap: 5px;
    grid-row-gap: 5px;
}

.grid-lg a {
    display: flex;
    padding: 10vh;
    justify-content: center;
    background-color: black;
    font-size: 32px;
    font-weight: bold;
    text-decoration: none;
    transition: background-color 0.5s;
}

.grid-sm a {
    display: flex;
    padding: 2vh;
    justify-content: center;
    background-color: black;
    font-size: 24px;
    font-weight: bold;
    text-decoration: none;
    transition: background-color 0.5s;
}

.grid-lg a:visited, .grid-lg a,
.grid-sm a:visited, .grid-sm a {
    color: white;
}
.grid-lg a:hover,
.grid-sm a:hover {
    color: white;
    background-color: darkgray;
    transition: background-color 0.5s;
}

@media (prefers-color-scheme: dark) {
    body { background-color: black; color: white; }
    .grid-lg a, .grid-sm a {
        background-color: white;
        color: black;
    }
    .grid-lg a:visited, .grid-lg a,
    .grid-sm a:visited, .grid-sm a {
        color: black
    }
    .grid-lg a:hover,
    .grid-sm a:hover {
        color: lightgray;
        background-color: darkgray;
        transition: background-color 0.5s;
    }
}

@media only screen and (max-width: 700px) {
    .grid-lg, .grid-sm {
        display: block;
    }
    .grid-lg a, .grid-sm a {
        margin: 10px;
    }
}
@media only screen and (min-width: 1921px) {
    .grid-lg, .grid-sm {
        grid-template-columns: repeat(5, 1fr);
    }
}

input[type="file"] {
    width: 0.1px;
    height: 0.1px;
    opacity: 0;
    overflow: hidden;
    position: absolute;
    z-index: -1;
}

input[type="file"]  + label {
    font-size: 1.25em;
    font-weight: 700;
    color: white;
    background-color: black;
    display: inline-block;
}

input[type="file"]:focus + label,
input[type="file"]  + label:hover {
    background-color: red;
}