style.css

:root {
    --navbar-font-size: 1.25rem;
    --navbar-line-height: calc(var(--navbar-font-size) * 1.2);
    --nav-item-padding: 1rem;
    --navbar-height: calc(var(--nav-item-padding) * 2 + var(--navbar-line-height));

    --nav-bar-text-color: #c8d6e5;
    --nav-bar-background-color: #111;
    --nav-bar-hover-color: #555;
    --dropdown-box-shadow-color: rgba(0, 0, 0, 0.4);
    
    --background-color: rgb(44, 44, 44);
    --text-color: #ddd;
}
.light-mode {
    --nav-bar-text-color: #333;
    --nav-bar-background-color: #ddd;
    --nav-bar-hover-color: #aaa;
    --dropdown-box-shadow-color: rgba(0, 0, 0, 0.2);

    --background-color: white;
    --text-color: black;
}

body * {
    font-family: Arial, Helvetica, sans-serif;
    color: var(--text-color);
}
body {
    margin: 0px;
    background-color: var(--background-color);
    overscroll-behavior: none;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
h1 {
    margin-top: 1em;
    text-align: center;
    font-size: 4em;
}
p {
    margin: 4em 0;
    font-size: 1.75em;
    text-indent: 3em;
    line-height: 1.75em;
}

#nav-bar {
    background-color: var(--nav-bar-background-color);
    /* color: var(--nav-bar-text-color); */
    font-size: var(--navbar-font-size);
    line-height: var(--navbar-line-height);
    user-select: none;
    height: var(--navbar-height);
    width: 100%;
    z-index: 1;
    flex: 0;
}
.nav-item {
    float: left;
    color: var(--nav-bar-text-color);
    padding: var(--nav-item-padding);
    margin: 0px;
    text-decoration: none;
}
.nav-item:hover, .dropdown-item:hover {
    background-color: var(--nav-bar-hover-color);
    cursor: pointer;
}
.dropdown {
    float: left;
    overflow: hidden;
}
.dropdown-name {
    float: none;
    display: block;

    /* Overwrite button properties */
    background-color: initial;
    border: none;
    font-size: inherit;
}
.dropdown:hover .dropdown-content {
    display: block;
}
.dropdown-content {
    display: none;
    position: absolute;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px var(--dropdown-box-shadow-color);
    z-index: 1;
}
.dropdown-item {
    float: none;
    padding: var(--nav-item-padding);
    text-decoration: none;
    display: block;
    background-color: var(--background-color);
}
#background-canvas {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: -1;
}