body {
    background-color: rgb(235, 235, 235);
}
header {
    background-color: rgb(235, 235, 235);
    color: rgb(0, 0, 0);
    text-align: center;
    padding: 5px;
}
ul {
    list-style-type: none;
}
.split-container {
    display: flex;
}
.left-panel, .right-panel {
    flex: 1;
    padding: 20px;
    border: 2px solid #333;
    text-align: left;
}
.left-panel {
    background-color: rgb(167, 195, 196);
    margin-right: 10px;
    font-size: 17px;
    height: 600px;
}
.right-panel {
    background-color: rgb(167, 195, 196);
    height: 600px;
}
h1 {
    text-align: center;
    font-family: 'Franklin Gothic Medium', 'Arial Narrow', Arial, sans-serif;
    font-size: 60px;
}
h2 {
    text-align: center;
    font-size: 40px;
}
.onu {
    width: 400px;
    height: 250px;
}
.manos {
    width: 410px;
    height: 240px;
    margin: 0%;
    display: block;
}
.boton {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #fcfcfc;
    color: #000000;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 5px;
}