/*btn-main Button*/
button.btn-main {
    background-color: var(--primary-color-1);
    border: none;
    position: relative;
    overflow: hidden;
    font-family: "Montserrat", serif;
    font-size: 13px;
    color: #ffffff;
    letter-spacing: 2px;
    line-height: 1em;
    text-decoration: none;
    text-transform: uppercase;
    padding: 7px 20px 7px 20px;
    display: inline-flex;
    font-weight: bold;
    border-radius: 0;
    -moz-border-radius: 0;
    -webkit-border-radius: 0;
}
button.btn-main:before {
    top: 0;
    left: -100%;
    content: "";
    position: absolute;
    background: rgba(0, 0, 0, .5);
    width: 100%;
    height: 100%;
}
button.btn-main:hover {
    opacity: 0.8;
}
button.btn-main:hover:before {
    left: 0;
}

button.btn-line {
    background-color: transparent;
}
button.btn-line:before {
    top: 0;
    left: -100%;
    content: "";
    position: absolute;
    background-color: var(--primary-color-1);
    width: 100%;
    height: 100%;
}
button.btn-line:hover:before {
    left: 0;
}
button.btn-line:hover:after {
    position: absolute;
    padding-left: 10px;
}
button.btn-line:after {
    position: absolute;
    padding-left: 0;
    margin-top: 1px;
    -o-transition: 0.5s;
    -ms-transition: 0.5s;
    -moz-transition: 0.5s;
    -webkit-transition: 0.5s;
    transition: 0.5s;
    outline: none;
}