.content {
max-width: 1000px;
margin: auto;
}

body {
background-color: #ffffff;
color: #000000;
}

/* Dark mode styles */
body.dark-mode {
background-color: #1f1f1f;
color: #ffffff;
}

.single-line {
display: inline;
}

hr.solid {
border-top: 3px solid #bbb;
}

.container {
display: flex;
align-items: center;
}
.container > * {
    margin-right: 10px;
}