:root {
    --primary: #333;
    --secondary: #666;
    --bg-color: #fff;
    --box-bg-color: #eee;
    --link-color: #00e;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary: #eee;
        --secondary: #ccc;
        --bg-color: #222;
        --box-bg-color: #333;
        --link-color: #55f;
    }
}

html, body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    margin: 0;
    color: var(--primary);
    background-color: var(--bg-color);
    font-family: sans-serif;
}

header {
    margin: 0 auto;
    padding: 1rem;
}

main {
    line-height: 1.5;
    margin: 0 auto;
    padding: 1rem;
    max-width: 768px;
    flex: 1 0 auto;
}

footer {
    color: var(--secondary);
    font-size: 0.9rem;
    text-align: center;
    padding: 1.5rem 0;
    flex-shrink: 0;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

ul li {
    padding: 1.5rem;
    margin-bottom: 1rem;
    background-color: var(--box-bg-color);
    border-color: rgba(0, 0, 0, 0);
    border-style: solid;
    border-width: 1px;
    border-radius: 1.5rem;
}

b {
    font-size: 1.6rem;
    color: var(--secondary);
}

.pr a, .build a, footer a {
    color: var(--secondary);
    text-decoration: underline;
    font-weight: bold;
    transition: 0.3s;
}

.pr a:hover, .build a:hover, footer a:hover {
    color: var(--link-color);
}