body {
    font-family: monospace;
    max-width: 600px;
    margin: 40px auto;
    padding: 20px;
    line-height: 1.5;
    background: #fff;
    color: #000;
}

body.dark-mode {
    background: #111;
    color: #eee;
}

header,
nav,
main {
    margin-bottom: 2rem;
}

nav {
    border-bottom: 1px solid #ccc;
    padding-bottom: 10px;
}

nav a {
    margin-right: 15px;
    text-decoration: underline;
    cursor: pointer;
    font-weight: bold;
}

nav a.active {
    color: rgb(29, 135, 255);
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

/* Positioned at bottom right */
#mode-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #fff;
    border: 1px solid #000;
    color: #000;
    cursor: pointer;
    padding: 5px 10px;
    font-family: inherit;
    font-size: 0.8rem;
    z-index: 1000;
}

body.dark-mode #mode-btn {
    background: #111;
    border: 1px solid #eee;
    color: #eee;
}

ul {
    list-style: "> ";
    padding-left: 15px;
}

li {
    margin-bottom: 5px;
}

a {
    color: inherit;
}