
.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: #8CF;
  text-shadow: 0 1px hsla(0, 0%, 100%, 0.5);
  color: #222;
}

.button:active,
.button.is-checked {
  background-color: #28F;
}

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

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

.button-group .button:first-child { border-radius: 0.5em 0 0 0.5em; }
.button-group .button:last-child { border-radius: 0 0.5em 0.5em 0; }

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

.grid {
  background: #EEE;
  max-width: 1200px;
}

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

/* ui group */

.ui-group {
  display: inline-block;
}

.ui-group h3 {
  display: inline-block;
  vertical-align: top;
  line-height: 32px;
  margin-right: 0.2em;
  font-size: 16px;
}

.ui-group .button-group {
  display: inline-block;
  margin-right: 20px;
}

/* color-shape */

.color-shape {
  width: 70px;
  height: 70px;
  margin: 5px;
  float: left;
}
 
.color-shape.round {
  border-radius: 35px;
}
 
.color-shape.big.round {
  border-radius: 75px;
}
 
.color-shape.red { background: red; }
.color-shape.blue { background: blue; }
.color-shape.yellow { background: yellow; }
 
.color-shape.wide, .color-shape.big { width: 150px; }
.color-shape.tall, .color-shape.big { height: 150px; }