.about-us {
    padding: 5% 15%;
}

.about-us-title {
    font-size: 3.125em;
    color: #000000;
}

.about-us-discription {
    font-size: 1em;
    padding-top: 4%;
}

.about-us-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    text-align: center;
    padding: 5%;
}

.about-us-card {
    align-items: center;
    display: inline-grid;
    justify-content: center;
    padding:4%;
}
.about-us-grid .about-us-card:nth-child(1) {
    border-bottom: #CCCCCC solid 0.15em;
    border-right: #CCCCCC solid 0.15em;
}

.about-us-grid .about-us-card:nth-child(2) {
    border-bottom: #CCCCCC solid 0.15em;
}

.about-us-grid .about-us-card:nth-child(3) {
    border-right: #CCCCCC solid 0.15em;
}

.about-us-card-img {
    padding-bottom: 3%
}

.about-us-card-title {
    font-size: 1em;
}

.about-us-card-text {
    max-width: 24em;
    font-size: .8em;
    text-align: justify;
}

@media (max-width: 760px){
    .about-us-title {
        font-size: 2.5em;
    }
    .about-us-grid {
        display: grid;
        grid-template-columns: repeat(1, 1fr);
    }
    .about-us-grid .about-us-card:nth-child(1){
        border: none;
    }
    .about-us-grid .about-us-card:nth-child(2) {
        border: none;
    }
    .about-us-grid .about-us-card:nth-child(3) {
        border: none;
    }
}

@media (max-width: 500px){
    .about-us-title {
        font-size: 2em;
    }
    .about-us-grid {
        display: grid;
        grid-template-columns: repeat(1, 1fr);
    }

    .about-us-grid .about-us-card:nth-child(1) {
        border: none;
    }

    .about-us-grid .about-us-card:nth-child(2) {
        border: none;
    }

    .about-us-grid .about-us-card:nth-child(3) {
        border: none;
    }
}