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

.button {
    display: inline-block;
    padding: 10px 18px;
    margin-bottom: 10px;
    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: #03c4eb;
}

.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 {
    padding-bottom: 25px;
}

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

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

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

.element-item {
    position: relative;
    float: left;
    width: 360px;
    height: auto;
    margin: 5px;
    padding: 10px;
    border: 1px solid #aaa;
    /*background: #888;*/
    /*color: #262524;*/
}

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

.element-item h2.name {
    padding-bottom: 10px;
    font-size: 22px;
    line-height: 1.5;
    color: #333333;
    font-family: "Open Sans";
    font-weight: 500;
    letter-spacing: -0.6px;
}

p#img-hover:hover {
    opacity: 0.8;
}

.element-item h2.name a {
    text-decoration: none;
}

.element-item .number {
    padding-top: 10px;
}

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

.element-item .wp-post-image {
    width: 100%;
}

.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%);
}