Template:ErindalStyleTest/styles.css

.erindal-style-test {
    --test-accent: #8b2e2e;

    max-width: 700px;
    margin: 2rem auto;
    padding: 1rem 1.25rem;

    color: var(--test-accent);
    border: 2px solid var(--test-accent);
    border-radius: 8px;
    background: #f8f2e8;

    font-size: 1.2rem;
    font-weight: 700;
}