.roiCalc-wrapper{
    max-width:420px;
    margin:0px auto;
    padding:40px 15px;
    font-family: Arial, sans-serif;
}

.roiCalc-box{
    background:#ffffff;
    padding:25px;
    border-radius:10px;
    box-shadow:0 5px 20px rgba(0,0,0,0.1);
}

.roiCalc-title{
    text-align:center;
    margin-bottom:20px;
}

.roiCalc-label{
    font-weight:600;
    display:block;
}

.roiCalc-input{
    width:100%;
    padding:10px;
    margin:8px 0 15px;
    border:1px solid #ccc;
    border-radius:5px;
    box-sizing:border-box;
}

.roiCalc-button{
    width:100%;
    padding:12px;
    background:#007bff;
    color:white;
    border:none;
    border-radius:5px;
    font-size:16px;
    cursor:pointer;
}

.roiCalc-button:hover{
    background:#0056b3;
}

.roiCalc-result{
    margin-top:30px;
    background:#f8f9fa;
    padding:20px;
    border-radius:8px;
    text-align:center;
    font-size:18px;
    font-weight:bold;
}