body{
    font-family:Arial,sans-serif;
}

.bdhw-card{
    max-width:700px;
    margin:40px auto;
    background:#ffffff;
    padding:30px;
    border-radius:20px;
    box-shadow:0 4px 25px rgba(0,0,0,0.08);
}

.bdhw-card h2{
    margin-top:0;
    margin-bottom:25px;
    text-align:center;
}

.bdhw-card input,
.bdhw-card select{
    width:100%;
    padding:14px;
    border-radius:12px;
    border:1px solid #d1d5db;
    margin-bottom:16px;
    box-sizing:border-box;
    font-size:15px;
}

.bdhw-btn{
    width:100%;
    padding:15px;
    border:none;
    border-radius:14px;
    background:#16a34a;
    color:#fff;
    font-size:16px;
    cursor:pointer;
}

.bdhw-result{
    margin-top:25px;
    background:#f9fafb;
    padding:20px;
    border-radius:14px;
    border-left:5px solid #16a34a;
}

.bdhw-highlight{
    font-size:32px;
    font-weight:bold;
    color:#16a34a;
}

@media(max-width:768px){

    .bdhw-card{
        margin:15px;
        padding:20px;
    }
}