body {
    margin:0em
}

h1 {
    font-size: 70px;
    padding-left: 50px;
}

h2 {
    font-size: 30px;
    color: blue;
}

h3 {
    font-size: 20px;
    font-style: italic;
    font-weight: bolder;
    color:black
}



.cover{
    height: 300px;
    background-image: url(/img/gas.jpg) ;
    color:white;
    background-size: cover;
    background-position: center;
    background-color: rgba(0, 0, 0, 0.5);
    background-blend-mode: darken;
}

.cover-small {
    height: 200px;
    background-blend-mode: normal;
}

.card{
    border: 0;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.05);
}