style1.css

body {
    background-color: #cecec6;
    padding: 0 0px;
    height: 300vh;
}

.caixa {
    position: relative;
    width: 940px;
    margin: 0 auto;
}

nav {
    position: absolute;
    top: 70px;
    right: 0;
}

header {
    position: sticky;
    background: #4a94e2;
    padding: 20px 0;
    top: 0;
    right: 0;
}

nav li {
    display: inline;
    margin: 0 0 0 15px,
}

nav a {
    text-transform: uppercase;
    color:#cbcbcb;
    font-weight: bold;
    font-size: 25px;
    text-decoration: none;
}

nav a:active {
    color: green;
    
}

nav a:visited {
    color: navy;
    
}

li::marker {
    content: "\002A";
    color: red;
    font-size: 20px;
    
}

h2, h3, p, ul, li {
    text-align: justify;
    padding: 5px;
    margin: 5px;
}

h2 {
    color: #301ac4;
    font-weight: bold;
    text-align: center;
    margin-top: 10px;
    font-size: 20px;
    text-transform: inherit;
    width: 80%;

}

p {
    color:  #408fce;
    font-size: 25px;
    
}

.participantes, .formadores {
    display: flex;
    text-align: center;
     
}

.participantes {
    width: 400px;
    height: 500px;
}

.formadores {
    width: 250px;
    height: 250px;
    padding: 20px;
    margin: 20px;
}

.participantes li {
    text-align: center;
    display: flex; 
    flex-direction: column;
    align-items: center;
    justify-content: center;
    align-content: center;
    border: 5px solid navy;
    border-radius: 10%;
   
}

footer {
    text-align: center;
    background-image: url(https://visme.co/blog/wp-content/uploads/2017/07/50-Beautiful-and-Minimalist-Presentation-Backgrounds-040.jpg);
    background-size: cover;

}

.rodape {
    width: 15%;
    height: 15%;
}

.textorodape {
    text-align: center;
    color: navy;
    font-size: 30px;
}