* {
    box-sizing: border-box;
}

.main {
    background-color: #6666daa0;
    max-height: 500px;
    border-top-left-radius: 30px;
    border-bottom-left-radius: 30px;
    overflow: auto;
}

.inside {
    background-color: #d69b43;
    display: inline-block;
    max-width: 250px;
    max-height: 200px;
    padding: 10px;
    margin: 10px;
    border-radius: 40px;
    box-shadow: inset 0px -1px 10px 1px;
}