contacto.css

*{border:1px dotted brown;}

header {
    background-color: #BBB;
    padding: 10px 0;
}

nav {
    position: absolute; 
    top: 110px; 
    right: 150px;
}

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

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

nav a {
    text-transform: uppercase;
    color: #000;
    font-weight: 700;
    font-size: 22px;
    text-decoration: none;
}

main {
    width: 960px;
    margin: 10px auto;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 20px;
}

main label {
    display: block;
    margin-bottom: 10px;
}

main label>div {
    margin: 0 0 0 30px;
    border: 1px dotted blue;
    width: 30%;
} 

main input {
    font-size: 22px;
    padding: 3px 5px;
    width: 50%;
}

main input[type="radio"], main input[type="checkbox"] {
    display: inline;
    vertical-align: top;
    width: 22px;
    height: 22px;
    margin: 0;
}

main input[type="submit"] {
    width: 120px;
    background: orange;
    font-weight: bold;
    color: #fff;
    float: right;
    margin: 0 20% 10px;
    border-radius: 5px;
    transition: 0.3s all;
    cursor: pointer;
}

main input[type="submit"]:hover {
    background: rgb(220, 100, 1);
    transform: scale(1.05) rotate(-4deg)
}

main textarea {
    resize: vertical;
    font-family: inherit;
    font-size: inherit;
}

main legend {
    margin-bottom: 25px;
} 

main select {
    font-size: inherit;
    cursor: pointer;
}

table {
    border: 1px dotted navy;
    margin: 40px;
}

table thead {
    background: #555;
    color: #fff;
    font-weight: bold;
}

td, th {
    padding: 7px 16px;
    border: 1px dotted #333;
    vertical-align: middle;
    text-align: center;
}

footer {
    display: block;
    text-align: center;
    background: url("imagenes/bg.jpg");
    padding: 40px;
    color: white;
    font-size: small;
}

footer p {
    margin: 20px;
}