body {
    background-color: black;
}

div {
    border: 10px solid #5e361f;
    margin: 100px;
}

h1 {
    font-family: "Lucida Console", "Courier New", monospace;
    color: #ffffff;
    font-optical-sizing: auto;
    font-size: 48px;
    text-align: center;
}

h2 {
    font-family: "Lucida Console", "Courier New", monospace;
    color: #ffffff;
    font-optical-sizing: auto;
    font-size: 32px;
    text-align: center;
}

p {
    font-family: "Lucida Console", "Courier New", monospace;
    color: #ffffff;
    line-height: 1.5;
    font-size: 24px;
    font-optical-sizing: auto;
    margin: 32px;
}

.code-img {
    width: 49.27%
}

#img-principal {
    float: left; 
    margin: 10px; 
    width: 50%;
}

.img-ruby-proto {
    float: right;
    margin: 10px;
    width: 25%
}

#lyly-box {
    float: right;
    width: 4%;
    margin: 50px;
}

iframe {
    display: block;
    margin: auto;
}