body {
    background-color: #f7f7f7;
    color: #333;
    font-family: Arial, Helvetica, sans-serif;
    overflow-x: hidden;
    position: relative;
}

html {
    scroll-behavior: smooth;
}

nav {
    width: 100%;
    background-color: white;
    padding: 15px;
    box-shadow: 0 5px 3px #00000011;
    position: sticky;
    top: 0;
}

ul {
    display: flex;
    width: 50%;
    justify-content: space-around;
    margin-left: auto;
}

a {
    text-decoration: none;
    color: #333;
}

a.active {
    color: palevioletred;
}

main {
    max-width: 768px;
    margin: 15px auto 0 auto;
}

h1 {
    font-size: 2.1rem;
    font-weight: bold;
}

h2 {
    font-size: 1.4rem;
    font-weight: bold;
    margin-bottom: 10px;
}

section {
    margin: 20px 0;
}

p {
    line-height: 1.4rem;
    margin-bottom: 1rem;
}

section {
    padding-top: 50px;
    margin-top: -50px;
}

@media (max-width: 768px) {
    main {
        margin: 20px;
    }

    ul {
        width: 100%;
    }
}