good.css

*, *:before, *:after {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

.float-left  { 
    float: left;
}

.float-right {
    float: right;
}

.hide { 
    display: none;
}

.show {
    display: block;
}

.disabled {
    pointer-events: none;
    opacity: 0.5;
}

table tr:nth-child(even) {
    background: rgba(0,0,0,0.1);
}

html {
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    font-size: 20px;
    height: 100%;
}

a {
    text-decoration: none;
    outline: 0 !important;
    color: inherit;
    transition: all 0.3s ease-out;
    -webkit-transition: all 0.3s ease-out;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: normal;
    margin: 1rem 0;
    line-height: 1.2em;
}

@media only screen and (max-width: 767px) {
    .no-tablet {
        display: none;
    }
}

@media only screen and (max-width: 480px) {
    .no-phone {
        display: none;
    }
}

/* Clearfix */

.cf:before,
.cf:after {
    content: " "; /* 1 */
    display: table; /* 2 */
}

.cf:after {
    clear: both;
}

.cf {
    *zoom: 1;
}

/* 
    Click and edit any text in the browser
    http://www.css-101.org/articles/trick-for-rapid-prototyping/
*/

* {
    -webkit-user-modify: read-write;
    word-wrap: break-word;
    -webkit-nbsp-mode: space;
    -webkit-line-break: after-white-space;
}

a {
    /* While keeping the links clickable */
    -webkit-user-modify: initial;
}