p.underline         { color: #333 }
p.underline::after  { 
    content:""; 
    height: 2px; 
    background-color:#eee; 
    display: block; 
    margin-top: 10px; 
    border-left: solid 80px #ffc100;
}

    p.withline {
        color: #00af98;
        text-align: center;
        display: flex;
        align-items: center;
        padding: 0 180px;
        margin-top: 30px;
    }
    p.withline::before,
    p.withline::after, {    
        content: "";
        flex: 1;
        background-color: #00af98;
        height: 2px;
        margin: 0 10px;
    }