:root {
    --color-primary: #2a2a2e;
    /* 
    Color palette:
    #D3CAE2 (light purple)
    #E6C17A (light yellow)
    #F6EDE3 (light beige)
    #404041 (dark gray)
    */
}

html,
body {
    height: 100%;
    margin: 0;
}

body {
    --size: 15px;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--color-primary);
    background: linear-gradient(162deg, #d3cae2 0%, #f6ede3 50%, #e6c17a 100%);
}

.container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
}

header {
    display: flex;
    justify-content: space-between;
    width: calc(var(--size) * 17);
    font-size: 2em;
    font-weight: 900;
}

.grid {
    display: grid;
    grid-template-columns: repeat(15, auto);
    grid-template-rows: repeat(15, auto);
    border: var(--size) solid var(--color-primary);
}
.tile {
    position: relative;
    width: var(--size);
    height: var(--size);
}
.content {
    position: absolute;
    width: 100%;
    height: 100%;
}

footer {
    margin-top: 20px;
    max-width: calc(var(--size) * 17);
    text-align: center;
}

@media (min-height: 425px) {
    body {
        --size: 25px;
    }

    footer {
        height: 40px;
        font-size: 1em;
    }
}