body {
    padding: 20px;
}
.container {
    max-width: 800px;
    margin: auto;
}
.input-field {
    margin-top: 10px;
}
.stages {
    margin-top: 20px;
}
#stage1, #stage2 {
    width: 400px;
    height: 400px;
    background-color: #f5f5f5;
    border: 2px solid #ddd;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
}