*{
    margin:0px ;
    padding: 0px;
    box-sizing: border-box;
    
}

body{
    background-image: url(./image/corona.jpg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    height: 100vh;
}

#container{
    margin-left: 20px;
    margin-top: 40px;
    display:inline-block;
}
.conceal{
    width: 500px;
    height: 450px;
    background-color: rgb(39, 68, 68);
    opacity:0.8;
    border-radius: 20px;
    position:absolute;
    z-index:0;
}

.read{
    width: 500px;
    height: 450px;
    border-radius: 20px;
    position:relative;
    z-index:1;
    display:flex;
    flex-direction: column;
    row-gap:10px;
}

h1{

    color: azure;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-size: 30px;
}

.a{
    background-color:green;
    width:400px;
    height:100px;
    border-radius: 10px;
    margin-left:20px;
    margin-top:30px;
    padding-left:10px;
    display:flex;
    align-items: center;
    padding-top: 50px;
    padding-bottom: 50px;

   

}
.b{
    background-color:gray;
    width:90px;
    height:100px;
    border-radius: 10px;
    margin-left:20px;
    margin-top:30px;
    padding-left:10px;
    display:flex;
    align-items: center;
    padding-top: 50px;
    padding-bottom: 50px;

}

.c{
    background-color:gray;
    width:10px;
    height:100px;
    border-radius: 10px;
    margin-left:20px;
    margin-top:30px;
    padding-left:10px;
    display:flex;
    align-items: center;
    padding-top: 50px;
    padding-bottom: 50px;
}

.b h1{
    position: absolute;
}