*{
    --main-font: 'Source Sans Pro', sans-serif;
    --secondary-font: 'Herr Von Muellerhoff', cursive;
    --body-font: 'Cabin', sans-serif;
    --secondary-font-color: #ffce76;
}

html{
    background-color: #222831;
}

.hero-certificates {
    width: 100%;
    height: 70vh;
    background: linear-gradient(to bottom, rgba(0,0,0,.5), transparent), url("../images/certificates.jpg");
    background-size: cover;
    display: flex;
    align-items: center;
    text-align: center;
}

.hero-certificates h2{
    margin-bottom: 20px;
}

.intro-subheadline{
    text-align: center;
    font-size: 5rem;
}

.intro-content{
    font-size: 17px;
    font-family: var(--main-font);  
    letter-spacing: .2rem;
    color: #fdfdfd;
    line-height: 30px;
    text-align: justify;
    margin-bottom: 40px;
}

.intro-section .asterisk{
    margin: 15px 0;
}

.about-intro .separator-subheadline{
    margin: 30px 0;
}

.col-8{
    width: 66%;
    float: left;
    padding-right: 20px ;
}

.col-4 img{
        width: 100%;
        height: 250px;
        object-fit: cover;
}

.col-4{
    width: 33%;
    float: left;
    padding: 10px;
}

.certificates{
    display: flex;
    justify-content: center;
    align-items: center;
}

.container-certificates {
    position: relative;
    display: flex;
    flex-wrap: wrap;
}

.container-certificates .icon{
    position: relative;
    width: 50%;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: stretch;
    flex-wrap: wrap;
}

.container-certificates .icon .iconBx{
    position: relative;
    width: calc(50% - 40px);
    margin: 0 20px 20px 0;
    padding: 0 25px;
    height: 190px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    border-radius: 14px;
    transition: 0.5s;
    box-shadow: 0 5px 15px rgba(0, 0, 0, .2);
}

.container-certificates .icon .iconBx.active-cert{
    box-shadow: 0 10px 30px rgba(80, 59, 59, 0.4);
}

.container-certificates .icon .iconBx img{
    max-width: 100%;
    object-fit: contain;
    padding: 10px 0;
    filter: opacity(0.5);
    transition: 0.5s;
    transform: scale(0.7);
}

.container-certificates .icon .iconBx.active-cert img{
    filter: opacity(1);
    transform: scale(1);
}

.content{
    position: relative;
    width: 50%;
    overflow: hidden;
}

.content .headline{
    font-size: 3.7rem;
}

.content .contentBx{
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 0.5s;
    transform: scale(0);
    opacity: 0;
}

.content .contentBx.active-cert{
    transform: scale(1);
    opacity: 1;
    transition-delay: 0.2s;
}

@media screen and (max-width: 800px){

    .container-certificates .icon{
        width: 100%;
    }

    .content{
        width: 100%;
    }
}

@media screen and (max-width: 500px){

    .col-8{
        width: 100%;
    }
    
    .col-4 img{
            width: 100%;
            height: 250px;
            object-fit: cover;
    }
    
    .col-4{
        width: 100%;
    }

    .hero-certificates .sub-headline{
       font-size: 5.4rem;
    }
}