body {
    font-family: "Roboto", sans-serif;
    background-color: azure;
}

main section {
    border-radius: 10px;
    margin: 10px 0;
    box-shadow: #6b90a3 0 0 5px 0;
}
.mu-section-presentation {
    background-image: url("/images/backgrounds/frame-7901981.jpg");
    background-color: white;
    background-position: center;
    background-repeat: no-repeat;
    background-size: 100% 100%;
    box-shadow: #6b90a3 0 5px 50px 5px;

    font-size: small;
}

.mu-section-services {
    background-image: url("/images/backgrounds/book-3033196_1920.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.mu-section-customers {
    background-image: url("/images/backgrounds/school-supplies-5541102.jpg");
    background-position: bottom;
    background-repeat: no-repeat;
    background-size: cover;
}

.mu-section-contact {
    background-image: url("/images/backgrounds/texture-2119292.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.mu-textbox {
    background-color: rgba(0, 0, 0, 0.55);
    border-radius: 16px;
    border-color: black;
    border-style: dotted;

    color: white;
    padding: 10px;
}

.mu-black-board {
    background-image: url("/images/black-5078620.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-size: 100% 100%;
    
    margin: 5px;
    padding: 1rem;

    color: white;
    font-size: larger;
}

footer, nav {
    background-color: #6b90a3;
}

footer {
    color: white;
    padding: 5rem 1rem 1rem 0;
}

footer a {
    text-decoration: underline #a1cfd1;
    color: white;
    font-weight: bold;
}

footer a:hover {
    color: #a1cfd1;
}

.mu-footer-copyright {
    font-size: 12px;
}

.mu-footer-email {
    font-size: 16px;
}

@media (min-width: 1200px) {
    .mu-footer-email {
        font-size: 24px;
    }
}