* { box-sizing: border-box; }

body {
  font-family: sans-serif;
}

/* ---- button ---- */

.button {
  display: inline-block;
  padding: 0.5em 1.0em;
  background: #EEE;
  border: none;
  border-radius: 7px;
  background-image: linear-gradient( to bottom, hsla(0, 0%, 0%, 0), hsla(0, 0%, 0%, 0.2) );
  color: #222;
  font-family: sans-serif;
  font-size: 16px;
  text-shadow: 0 1px white;
  cursor: pointer;
}

.button:hover {
  background-color: orange;
  text-shadow: 0 1px hsla(0, 0%, 100%, 0.5);
  color: #222;
}

.button:active,
.button.is-checked {
  background-color: #FF5B06;
}

.button.is-checked {
  color: white;
  text-shadow: 0 -1px hsla(0, 0%, 0%, 0.8);
}

.button:active {
  box-shadow: inset 0 1px 10px hsla(0, 0%, 0%, 0.8);
}

/* ---- button-group ---- */

.button-group {
  margin-bottom: 20px;
}

.button-group:after {
  content: '';
  display: block;
  clear: both;
}

.button-group .button {
  float: left;
  border-radius: 0;
  margin: 1px;
}

/* ---- isotope ---- */

/* clear fix */
.grid:after {
  content: '';
  display: block;
  clear: both;
}

/* ---- .element-item ---- */

.element-item {
  background-repeat: no-repeat !important;
  background-size: cover !important;
  background-position: center !important;
  position: relative;
  float: left;
  width:  200px;
  height: 200px;
  margin: 5px;
  padding: 10px;
  background: #888;
  color: #fff;
  text-shadow: 1px 1px 4px #000;
}

.element-item > * {
  margin: 0;
  padding: 0;
}