* {
    border: none;
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    background-color: #FFF;
}

body > * {
    margin: 3vh 25vw;
    border-radius: 10px;
    padding: 10px;
}

h1 {
    border-radius: 0px;
    margin: 0;
    text-align: center;
    background-color: black;
    color: #FFF;
    padding: 2vh;
}

section {
    background-color: rgb(187, 186, 186);
    margin: 3vh auto;
    width: 40%;
    padding: 1vh;
    border: 3px solid black;
}

section h2 {
    text-decoration: underline;
    margin: 1vh 0vw;
    text-align: center;
}

section p {
    margin: 1vh 0vw;
    text-align: center;
    font-size: 18px;
}

section:last-of-type {
    margin-bottom: 7vh;
}

footer {
    position: fixed;
    bottom: 0;
    width: 100%;
    margin: 0vh;
    margin-top: 3vh;
    text-align: center;
    padding: 1vh;
    color: white;
    background-color: black;
    border-radius: 0px;
}

#S2 {
    background-color: lightcoral;
}

.S3 {
    color: blue;
}

#S4 p {
    color: rgb(1, 90, 1);
}

#S6 p + p {
    color: rgb(204, 24, 24);
}

#S7 > p {
    color: blue;
}

#S8 h2 ~ p {
    color: blueviolet;
}

#S9:hover {
    background-color: lightblue;
}

#S11 p:nth-child(even){
    color: blue;
}