* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background: #8CA6D4;
}

h1 { font-size: 56px; }

header {
    background: #8CA6D4;
    color: #11756D;
    padding: 25px;
    text-align: center;
}

nav ul {
    list-style: none;
}

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

main {
    padding: 20px;
    width: 80%;
    margin: 0 auto;
    text-align: center;
    color: #2657a0;
    background: #b3c7e0;
}

footer {
    text-align: center;
    padding: 10px;
    background: #8CA6D4;
}