body {
    background-color: #f0f0f0;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    display : flex;
    justify-content: center;
    height: 100vh;
    overflow: hidden;

}

.container {
    display : flex;
    width : 90vw;
}

.panel {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    height: 80vh;
    border-radius: 10px;
    color : white;
    cursor: pointer;
    flex : 0.5;
    margin: 10px;
    position: relative;
    transition : flex 0.7s ease-in;
}

.panel h3 {
    font-size: 1.5em;
    position: absolute;
    bottom: 20px;
    left: 20px;
    margin: 0;
    opacity: 0;
}

.panel.active {
    flex : 5;
}

.panel.active h3{
    opacity: 1;
    transition : opacity 0.7s ease-in 0.4s;
    
}