A common css file including normalize and reset css

common.css

@import 'https://github.com/necolas/normalize.css/blob/master/normalize.css'

/**
 * For modern browsers
 * 1. The space content is one way to avoid an Opera bug when the
 *    contenteditable attribute is included anywhere else in the document.
 *    Otherwise it causes space to appear at the top and bottom of elements
 *    that are clearfixed.
 * 2. The use of `table` rather than `block` is only necessary if using
 *    `:before` to contain the top-margins of child elements.
 */
.cf:before,
.cf:after {
    content: " "; /* 1 */
    display: table; /* 2 */
}

.cf:after {
    clear: both;
}

/**
 * For IE 6/7 only
 * Include this rule to trigger hasLayout and contain floats.
 */
.cf {
    *zoom: 1;
} 

.hide-text {
  text-indent: 100%;
  white-space: nowrap;
  overflow: hidden;
}   

img {
  max-width: 100%;
  height: auto;
}