scaffold.css

* {
    box-sizing: border-box;
}

.row::after {
    content: "";
    clear: both;
    display: table;
}

[class*="col-"] {
    float: left;
    padding: 15px;
}

html {
    font-family: "Google Sans", sans-serif;
}

.header {
    background-color: var(--theme-color);
    color: #ffffff;
    padding: 15px;
}

.menu ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
}

.menu li {
    padding: 8px;
    margin-bottom: 7px;
    background-color: #33b5e5;
    color: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

.menu li:hover {
    background-color: #0099cc;
}

.aside {
    background-color: #33b5e5;
    padding: 15px;
    color: #ffffff;
    text-align: center;
    font-size: 14px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
}

.footer {
    background-color: #0099cc;
    color: #ffffff;
    text-align: center;
    font-size: 12px;
    padding: 15px;
}

/* For mobile phones: */
[class*="col-"] {
    width: 100%;
}

@media only screen and (max-width: 768px) {
    .hero-picture {
        display: none;
    }
}
@media only screen and (min-width: 600px) {
    /* For tablets: */
    .col-s-1 {
        width: 8.33%;
    }

    .col-s-2 {
        width: 16.66%;
    }

    .col-s-3 {
        width: 25%;
    }

    .col-s-4 {
        width: 33.33%;
    }

    .col-s-5 {
        width: 41.66%;
    }

    .col-s-6 {
        width: 50%;
    }

    .col-s-7 {
        width: 58.33%;
    }

    .col-s-8 {
        width: 66.66%;
    }

    .col-s-9 {
        width: 75%;
    }

    .col-s-10 {
        width: 83.33%;
    }

    .col-s-11 {
        width: 91.66%;
    }

    .col-s-12 {
        width: 100%;
    }
}

@media only screen and (min-width: 768px) {
    .hero-picture {
        display: flex;
    }
    /* For desktop: */
    .col-1 {
        width: 8.33%;
    }

    .col-2 {
        width: 16.66%;
    }

    .col-3 {
        width: 25%;
    }

    .col-4 {
        width: 33.33%;
    }

    .col-5 {
        width: 41.66%;
    }

    .col-6 {
        width: 50%;
    }

    .col-7 {
        width: 58.33%;
    }

    .col-8 {
        width: 66.66%;
    }

    .col-9 {
        width: 75%;
    }

    .col-10 {
        width: 83.33%;
    }

    .col-11 {
        width: 91.66%;
    }

    .col-12 {
        width: 100%;
    }
}

body {
    margin: 0;
}