water.css (dark theme) 

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Robo...

h2,
h3,
h4,
h5,
h6 {
    margin-bottom: 12px;
}

h1,
h2,
h3,
h4,
h5,
h6,
strong {
    color: #000;
}...