body{
    padding: 20px;
    margin: 0;
    min-height: 105vh;
}
.checkbox-group {
    margin-bottom: 10px;
}
h1{
    font-size: 30px;
    padding: 15px 0;
}
/* checkbox */
input[type="checkbox"] {
    appearance: auto; /* apply the default style of browser */
    width: 16px;
    height: 16px;
} 
input[type="checkbox"]::-ms-check {
    background-color: white;
    border: 1px solid #ccc;
}  
input[type="checkbox"]:checked {
    accent-color: #0078D4;
}

.main table {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
}

.main th, .main td {
    border: 1px solid #ccc;
    padding: 8px;
    text-align: center;
    vertical-align: middle;
}
.main th{
    background-color: aliceblue;
}
td input[type="checkbox"] {
    margin: 2px;
}
.line{
    width: 100%;
    height: 30px;
    margin: 50px auto 20px;
    text-align: center;
    font-size: 20px;
    background-color: aliceblue;
    border-top: 1px solid black;
    border-bottom: 1px solid black;
}
.result table {
    width: 40%;
}

.result table td {
    width: 50%;
    text-align: center;
}
@media screen and (max-width:720px){
    h1{
        font-size: 25px;
        padding: 15px 0;
    }
    .main table{
        display: block;
        overflow-x: scroll;
        white-space: nowrap;
    }
    .result table {
        width: 100%;
    }
    
    .result table td {
        width: 50%;
        text-align: center;
    }
}