:root {
    --background-color1: #1f1f1f;
    --foreground-color1: #86b6ff;
    --foreground-color2: #1fff80;
    --foreground-color3: #ffdd00;
}

* {
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    margin: 0;
    background-color: var(--background-color1);
    color: white;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    padding: 1vh 0;
    color: var(--foreground-color3);
    font-family: "Germania One", system-ui;
    font-weight: 700;
    font-size: 3rem;
    text-align: center;
    border-bottom: white solid;
}

main {
    display: flex;
    flex-grow: 1;
    align-items: stretch;
}

aside {
    width: 15vw;
    min-width: 192px;
    max-width: 384px;
    border-right: white solid;
    padding: 1vh 1vw;
}

section {
    padding: 1vh 1vw;
    flex-grow: 1;
    display: flex;
    justify-content: center;
    overflow-y: scroll;
}

footer {
    padding: 1vh 0;
    background-color: var(--background-color1);
    text-align: center;
    border-top: white solid;
}

a {
    text-decoration: none;
    color: #86b6ff;
}

#cards {
    display: grid;
    grid-auto-flow: dense;
    --columns: 3;
    grid-template-columns: repeat(var(--columns), var(--card-width));
    gap: var(--card-padding);
    max-height: calc(var(--card-height));
}

.control-button {
    text-decoration: none;
    margin-bottom: 1vh;
    padding: 0.5vh;
    background-color: var(--foreground-color1);
    color: var(--background-color1);
    border-style: solid;
    border-color: white;
    display: block;
    width: 100%;
    text-align: center;
    font-size: 1em;
    font-weight: 700;
    transition: 0.3s;
    border-radius: 0.3em;
}

.control-button:hover {
    background-color: var(--foreground-color2);
}

input.control-button {
    display: none;
}

@page {
    margin: 0;
}

@media print {
    body {
        background-color: white;
    }

    header, footer, aside {
        display: none;
    }

    main {
        align-items: start;
    }

    section {
        overflow-y: visible;
        padding: 0;
    }

    #cards {
        grid-template-columns: repeat(3, var(--card-width));
        max-height: none;
        gap: 0;
    }

    .card {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}