body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, sans-serif;
    display: grid;
    grid-template-rows: auto 1fr auto;
    background-color: var(--body-background-color);
    color: var(--body-font-color);
}

main, .content {
    padding: 50px;
    max-width: min(1100px, 100vw);
    margin: 0 auto;
    overflow-x: auto;
}

a {
    color: var(--body-background-color);
    text-decoration: none;
    font-weight: bold;
}

a:hover {
    color: #d1d1d1;
    text-decoration: underline;
}

.back_button {
    color: var(--body-font-color);
}

.back_button:hover {
    color: #4c4c4c;
}

.card {
    background-color: var(--card-background-color);
    color: var(--card-font-color);
    padding: 20px;
    /*border-radius: 10px;*/
}

.card > h2 {
    margin-top: 0;
}

input, button {
    background-color: var(--dark-color);
    opacity: 1;
    border: 3px solid var(--card-font-color);
    padding: 5px 10px;
    color: var(--card-font-color);
    font-weight: bold;
}

input[type=submit], button {
    cursor: pointer;
    transition: 0.3s;
}

input[type=submit]:hover, button:hover {
    background-color: #4c4c4c;
}

input[type=submit]:disabled, button:disabled, button[disabled] {
    background-color: #b30000;
    cursor: not-allowed;
}