main {
    min-width: 320px;
    max-width: 1210px;
    padding: 20px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid #0000001c;
}

section {
    display: none;
    padding: 20px 0 0;
    border-top: 1px solid #ddd;
}

input {
    display: none;
}

label {
    display: inline-block;
    margin: 0 0 -1px;
    padding: 15px 25px;
    font-weight: 600;
    letter-spacing:3px;
    text-align: center;
    color: #bbb;
    border: 1px solid transparent;
}

    label:before {
        font-family: fontawesome;
        font-weight: normal;
        margin-right: 10px;
    }

    label[for*='1']:before {
        content: '';
    }

    label[for*='2']:before {
        content: '';
    }

    label[for*='3']:before {
        content: '';
    }

    label[for*='4']:before {
        content: '';
    }

    label:hover {
        color: #888;
        cursor: pointer;
    }

input:checked + label {
    color: #555;
    border: 1px solid #ddd;
    border-top: 2px solid #6c228e;
    border-bottom: 1px solid #fff;
}

#tab1:checked ~ #content1,
#tab2:checked ~ #content2,
#tab3:checked ~ #content3,
#tab4:checked ~ #content4 {
    display: block;
}

@media screen and (max-width: 650px) {
    label {
        font-size: 20px;
        width: 100% !important;
        border: 1px solid #00000021;
    }

        label:before {
            margin: 0;
            font-size: 18px;
        }
}

@media screen and (max-width: 400px) {
    label {
        padding: 15px;
        width: 100% !important;
        border: 1px solid #00000021;
    }
}