@import url("https://fonts.googleapis.com/css?family=Muli&display=swap");
*{
    box-sizing: border-box;
}
body {
    font-family: "Muli", sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    overflow: hidden;
    min-width: 100vh;
    margin: 0;
  }
.container {
    display: flex;
    width: 90vw;
}
.panel{    
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    height: 80vh;
    width: 10%;
    border-radius: 50px;
    flex: 0.5s;
    position: relative;
    cursor: pointer;
    margin: 10px;
    transition: .4s all;
    color: white;
}
.panel h3 {
    position: absolute;
    bottom: 20px;
    left: 20px;
    opacity: 0;
}
.panel.active {
    width: 100%;
    height: 80vh;
}
.panel.active h3{
    position: absolute;
    bottom: 5px;
    left: 20px;
    color: white;
    opacity: 1;
}

@media (max-width: 480px){
    .container{
        width: 100vh;
    }
    .panel:nth-of-type(2){
        display: none;
    }
    .panel:nth-of-type(3){
        display: none;
    }
}