/* General button style (reset) */
.a4-btn {
    border: none;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    background: none;
    cursor: pointer;
    padding: 1rem 2rem;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    outline: none;
    position: relative;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    transition: all 0.3s;
}

.a4-btn:after {
    content: '';
    position: absolute;
    z-index: -1;
    -webkit-transition: all 0.3s;
    -moz-transition: all 0.3s;
    transition: all 0.3s;
}

/* Button 1 */
.a4-btn.style-1 {
    border: 3px solid orange;
    color: orange;
}

/* Button 1e */
.a4-btn.effect-1 {
    overflow: hidden;
}

.a4-btn.effect-1:after {
    width: 100%;
    height: 0;
    top: 50%;
    left: 50%;
    background: orange;
    opacity: 0;
    -webkit-transform: translateX(-50%) translateY(-50%) rotate(45deg);
    -moz-transform: translateX(-50%) translateY(-50%) rotate(45deg);
    -ms-transform: translateX(-50%) translateY(-50%) rotate(45deg);
    transform: translateX(-50%) translateY(-50%) rotate(45deg);
}

.a4-btn.effect-1:hover,
.a4-btn.effect-1:active {
    color: white;
}

.a4-btn.effect-1:hover:after {
    height: 260%;
    opacity: 1;
}

.a4-btn.effect-1:active:after {
    height: 400%;
    opacity: 1;
}