* {
  -webkit-box-sizing: border-box;
     -moz-box-sizing: border-box;
          box-sizing: border-box;
}

body {
  font-family: sans-serif;
}

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

.button {
  display: inline-block;
  padding: 10px 18px;
  margin-bottom: 10px;
  background: #ffffff;
  border: 1px solid #222222;
  color: #222;
  font-family: sans-serif;
  font-size: 16px;
  cursor: pointer;
  font-weight: bold;
  text-transform: capitalize;
}

.button:hover {
  background-color: #ffcb16;
  color: white;
}

.button:active,
.button.is-checked {
  background-color: #ffa027;
}

.button.is-checked {
  color: white;
}

.button:active {
  font-weight: bold;
}

/* ---- 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, .filters-button-group {
  text-align: center;
  margin-top: 50px;
  margin-bottom: 50px;
}

/*.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 {
  border: 1px solid #333;
}

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

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

.element-item {
  position: relative;
  float: left;
  width: 295px;
  height: 295px;
  margin: 5px;
  /*background: #888;*/
  /*color: #262524;*/
}

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

/*.element-item .name {*/
  /*position: absolute;*/

  /*left: 10px;*/
  /*top: 60px;*/
  /*text-transform: none;*/
  /*letter-spacing: 0;*/
  /*font-size: 12px;*/
  /*font-weight: normal;*/
/*}*/

/*.element-item .symbol {*/
  /*position: absolute;*/
  /*left: 10px;*/
  /*top: 0px;*/
  /*font-size: 42px;*/
  /*font-weight: bold;*/
  /*color: white;*/
/*}*/

/*.element-item .number {*/
  /*position: absolute;*/
  /*right: 8px;*/
  /*top: 5px;*/
/*}*/

/*.element-item .weight {*/
  /*position: absolute;*/
  /*left: 10px;*/
  /*top: 76px;*/
  /*font-size: 12px;*/
/*}*/

/*.element-item.alkali          { background: #F00; background: hsl(   0, 100%, 50%); }*/
/*.element-item.alkaline-earth  { background: #F80; background: hsl(  36, 100%, 50%); }*/
/*.element-item.lanthanoid      { background: #FF0; background: hsl(  72, 100%, 50%); }*/
/*.element-item.actinoid        { background: #0F0; background: hsl( 108, 100%, 50%); }*/
/*.element-item.transition      { background: #0F8; background: hsl( 144, 100%, 50%); }*/
/*.element-item.post-transition { background: #0FF; background: hsl( 180, 100%, 50%); }*/
/*.element-item.metalloid       { background: #08F; background: hsl( 216, 100%, 50%); }*/
/*.element-item.diatomic        { background: #00F; background: hsl( 252, 100%, 50%); }*/
/*.element-item.halogen         { background: #F0F; background: hsl( 288, 100%, 50%); }*/
/*.element-item.noble-gas       { background: #F08; background: hsl( 324, 100%, 50%); }*/