.hero {
    height: calc(70vh - 56px);
    display: grid;
    place-items: center;
}

.hero .group {
    width: 100%;
}

.hero .sub {
    text-transform: uppercase;
    font-size: 24px;
    color: white;
    font-weight: 100;
    margin: 0;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
    text-align: center;
    transition: font-size 0.5s;
    filter:brightness(1);
}

.hero .large {
    font-size: 100px;
    color: white;
    margin: 0;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
    text-align: center;
    transition: font-size 0.5s;
    filter:brightness(1);
    
}

@media screen and (max-width: 800px) {
    .hero .sub {
        font-size: 16px;
    }
    .hero .large {
        font-size: 84px;
    }
} 

@media screen and (max-width: 410px) {
    .hero .sub {
        font-size: 16px;
    }
    .hero .large {
        font-size: 60px;
    }
} 


header.masthead {
    position: relative;
    display: flex;
    max-width: 100%;
    width: 100%;
    background: no-repeat center center;
    background-color: #6c757d;
    background-size: cover;
    background-attachment: scroll;
  }
  
header.masthead:before {
content: "";
position: absolute;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: #212529;
opacity: 0.5;
}