.heading {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    gap: 20px;
}
.heading h1 {
    font-size: 29px;
    font-weight: 500;
    color: var(--text-color);
}
.heading hr {
    border: none;
    height: 2px;
    width: 100px;
    background-color: var(--primary-color);
}
.heading p {
    font-size: 18px;
    font-weight: 400;
    color: var(--text-color);
}
.references-list {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    flex-wrap: wrap;
    margin: 50px 0;
    width: 100%;
}
.reference {
    box-sizing: border-box;
    font-size: 18px;
    font-weight: 400;
    color: var(--text-color);
    line-height: 25px;
    font-style: italic;
    background-color: var(--light-gray-color);
    padding: 35px 75px;
    width: 1320px;
}
.reference:nth-child(even) {
    background-color: var(--white-color);
}

/* responsive */
@media screen and (max-width: 1320px) {
    .reference {
        width: 100%;
    }
}
@media screen and (max-width: 437px) {
    .reference {
        padding: 35px 25px;
    }
    
}