body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #ffffff;
}

header {
    background-color: #00c8ff;
    color: white;
    padding: 10px;
    text-align: center;
}

p {
    text-align: center;
    padding: 6px 8px 6px 8px;
}

h1 {
    color: black;
    margin-right: 55%;
    font-size: 2.5em;
}

nav {
    margin-top: 10px;
    margin-left: 60%;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
}

nav a:hover {
    text-decoration: underline;
}

.mensaje {
    width: 400px;
    text-align: center;
    padding: 20% 8px 0px 8px;
    padding: 16px 8px 16px 8px;
    border: 2px dashed #00c8ff;
    margin: auto;
    margin-top: 20%;
}

img {
    width: 100px;
}