body {
    width: 100%;
    font-family: Arial;
    margin: 0;
    background: #f9f9f9;
    color: #333;
}

header {
    background-color: #34d8cd;
    width: 100%;
    padding: 1rem;
    text-align: left;
}
h1,h2,h3,h4,p{text-align: center;}
h1 {
font-size: 4em;
color: #fafcf9;
font-family: "Arial", Arial, Helvetica, sans-serif;
text-align: center;
}   
h2 {
font-size: 3em;
color: #0a0a0a;
font-family: "Arial", Arial, Helvetica, sans-serif;
text-align: center;
}
h3{
font-size:2em;
color: #000000;
font-family:"Arial",Arial, Helvetica, sans-serif;
}

h4 {
font-size:2em;
color: #000000;
font-family:"Arial",Arial, Helvetica, sans-serif;
}

main {
    width: 75%;
    float: left;
}

.mides{
width: 600px;
height: 500px;
}

aside {
    width: 25%;
    background-color: #09c9f5;
    float: right;
}

footer {
    background-color: #34d8cd;
    clear: both;
    text-align: center;
    
}

iframe {
display: block;
margin: auto;
width: 80%;
height: 500px;
border: none;
}

    nav {
        width: 100%;
        height: 40px;
         font-family: Arial;
         background-color: #adf2f5;
    }

    nav select {
        display: none;
    }

    nav ul,
    nav ul li {
        display: inline;
        margin-right: 12px;
    }

.punt {
    font-size:0.00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001px;
}
p{margin:20px;}

table {
margin: 30px;
}
table, th, td {
  border: 1px solid black;
border-collapse: collapse;
}
img[alt="About me"] {
  display: block;
  margin-left: 50px;
  margin-right: 50px;
}