* {
    margin: 0;
    padding: 0;
    font-family: sans-serif;
}

body {
    display: grid;
    grid-template-rows: auto 1fr auto;
    height: 100vh;
    background-color: #054d6e0d;
}

main {
    margin-left: 20px;
    margin-right: 20px;
    margin-top: 150px;
}

/*---------------header----------------*/

header {
    background: #064c6d;
    position: fixed;
    width: 100%;
    z-index: 1000;
}

nav {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
    text-align: center;
    place-items: center;
    background: #064c6d;
}

nav>button {
    padding: 20px;
    text-decoration: none;
    border: none;
    background-color: transparent;
    color: white;
    width: 100%;
    font-family: sans-serif;
    font-size: large;
}

button:hover {
    background: #0c5d83 !important;
    cursor: pointer;
}

section {
    max-width: 1000px;
    width: 100%;
    margin: 0 auto;
}