* {
    box-sizing: border-box;
}

li {
    line-height: 2rem;
}

body {
    margin: 0;
    padding: 0;
    display: flex;
    position: relative;
}

.main-section > code {
    display: block;
    text-align: left;
    white-space: pre-line;
    position: relative;
    word-break: normal;
    word-wrap: normal;
    line-height: 2;
    background-color: #f7f7f7;
    padding: 1rem;
    margin: 10px;
    border-radius: 5px;
    z-index: -1;
}

#navbar {
    background-color: white;
    border: 2px double black;
    position: fixed;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    width: 20%;
    height: 100%;
}

#navbar .menu {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

#navbar header {
    border: 1px solid black;
    width: 100%;
    text-align: center;
    font-size: 2rem;
    padding: 0.3rem;
}

#navbar a {
    font-size: 1.1rem;
    padding: 0.8rem;
    border-top: 1px solid black;
    width: 100%;
    color: initial;
    text-decoration: none;
}

#navbar #hamburger-icon {
    display: none;
    width: 100%;
    background-color: inherit;
}

#main-doc {
    scroll-behavior: smooth;
    font-family: "Poppins", sans-serif;
    line-height: 1.5rem;
    width: 80%;
    margin-left: 20%;
    padding: 2rem;
}
section {
    margin-bottom: 1.5rem;
    padding-top: 0.3rem;
}

.main-section header {
    font-size: 2rem;
}

.display {
    display: none;
}

@media screen and (max-width: 768px) {
    #navbar #hamburger-icon {
        display: flex;
        margin: auto;
    }

    #navbar #hamburger-icon img {
        width: 5%;
        margin: auto;
    }

    #navbar {
        width: 100%;
        top: 0;
        height: auto;
    }

    section {
        padding-top: 6rem;
        margin-top: -2.5rem;
    }

    #navbar a {
        font-size: 1rem;
        padding: 0.6rem;
    }

    #main-doc {
        margin-top: 6rem;
        margin-left: 0;
        width: 100%;
    }
}

@media screen and (max-width: 450px) {
    #main-doc {
        margin-top: 4rem;
    }
    #navbar #hamburger-icon img {
        width: 10%;
        margin: auto;
    }
}