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

html {
    background-color: rgb(23, 23, 23);
}

body {
    font-family: "Geom", sans-serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;
}

header {
    background-color: black;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1em;
    width: 100%;
}

header img {
    max-width: 100%;
}

#nav_bar {
    width: 100%;
    background-color: black;
}

#nav_bar ul {
    display: flex;
    list-style-type: none;
    gap: 10em;
    justify-content: center;
}

#nav_bar li a {
    display: block;
    padding: 1em 2em;
    text-decoration: none;
    color: white;
    transition: all ease-in-out 200ms;
}

#nav_bar li a:hover {
    background-color: white;
    color: black;
    text-decoration: underline;
}

button {
    font-family: "Geom", sans-serif;
    font-optical-sizing: auto;
    font-weight: 400;
    font-style: normal;
    display: none;
    position: fixed;
    bottom: 2em;
    left: 2em;
    background-color: white;
    border: 2px solid black;
    color: black;
    padding: 10px;
    border-radius: 25px;
    transition: all ease-in-out 200ms;
}

button:hover {
    cursor: pointer;
    background-color: gray;
    color: lightgray;
}


footer {
    color: gray;
    text-align: center;
    padding: 1.5em;
    border-top: 2px solid gray;
    margin-top: 1em;
    font-variant: small-caps;
    font-size: 90%;
}