body{
    font-family: "Noto Sans JP",sans-serif;
    background:#f5f6fa;
    margin:0;
}
.container{
    max-width:680px;
    margin:30px auto;
    background:#fff;
    padding:20px;
    border-radius:10px;
}
h1{font-size:22px}
input,button{
    width:100%;
    padding:10px;
    margin-top:10px;
}
button{
    background:#2563eb;
    color:#fff;
    border:none;
    border-radius:6px;
}
.result{
    background:#eef2ff;
    padding:10px;
    margin:15px 0;
}
.ad-block{
    text-align:center;
    margin:20px 0;
}