body {
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    padding-top: 50px;
}

.box {
    border: 1px solid #4a7bb0;
    width: 600px;
    height: 300px;
    position: relative;
    overflow: hidden;
    background-color: #ffffff;
}

#circle {
    width: 80px;
    height: 80px;
    background-color: #00ffff;
    border-radius: 50%;
    position: absolute;
    top: 15px;
    left: 15px;
    cursor: grab;
    user-select: none;
}