<input type="text">

input[type=text] {   
    /* Remove First */
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;

    /* Then Style */
    border-radius: 15px;
    border: 1px dashed #BBB;
    padding: 10px;
    line-height: 20px;
    text-align: center;
    background: transparent;
    outline: none;    
}