*{
    box-sizing:border-box;
}

body{
    margin:0;
    padding:0;
    background:#f3f5f7;
    font-family:Arial, Helvetica, sans-serif;
}

.container{
    max-width:900px;
    margin:auto;
    padding:40px 20px;
}

.calculator-card{
    background:#ffffff;
    border-radius:12px;
    padding:35px;
    box-shadow:0 3px 15px rgba(0,0,0,.12);
}

h1{
    margin-top:0;
    text-align:center;
}

h3{
    margin-top:0;
    text-align:center;
}

.subtitle{
    text-align:center;
    color:#666;
    margin-bottom:30px;
}

.form-group{
    margin-bottom:20px;
}

label{
    display:block;
    font-weight:bold;
    margin-bottom:8px;
}

input{
    width:100%;
    padding:12px;
    border:1px solid #cccccc;
    border-radius:6px;
    font-size:16px;
}

button{
    width:100%;
    padding:14px;
    border:none;
    border-radius:6px;
    background:#005bbb;
    color:white;
    font-size:18px;
    cursor:pointer;
}

button:hover{
    background:#004799;
}

.notice{
    margin-top:15px;
    font-size:13px;
    color:#666666;
}

.result{
    display:none;
    margin-top:25px;
    background:#f7f7f7;
    padding:20px;
    border-radius:8px;
}

.result table{
    width:100%;
    border-collapse:collapse;
}

.result td{
    padding:8px 0;
}

.total{
    color:#005bbb;
    font-size:24px;
    font-weight:bold;
}

.breakdown{
    margin-top:20px;
    line-height:1.8;
}

@media(max-width:768px){

    .calculator-card{
        padding:20px;
    }

    .total{
        font-size:20px;
    }
}