.about-section {
    position: relative;
    min-height: 400px;
}
.about-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../images/textured-background.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.3;
    z-index: 0;
}
.about-section > * {
    position: relative;
    z-index: 1;
}
.about-section h3 {
    margin-top: 1rem;
    font-size: 1.2rem;
}
.about-section p{
    font-size: 0.75rem;
    padding: 0;
}