*, *:before, *:after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    /* background: linear-gradient(45deg, #e10522 0%, rgba(225, 5, 34, 0) 70%), linear-gradient(135deg, #3105d1 10%, rgba(49, 5, 209, 0) 80%), linear-gradient(225deg, #0adbd8 10%, rgba(10, 219, 216, 0) 80%), linear-gradient(315deg, #09f505 100%, rgba(9, 245, 5, 0) 70%); */
    background: radial-gradient(#93d9f9,#0c80b5);
}

.absolute-center, .menu .btn.open .line, .menu .btn .fab, .menu {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translateX(-50%) translateY(-50%);
}

.menu {
    width: 5em;
    height: 5em;
}

.menu .btn {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    opacity: 0;
    z-index: -10;
    cursor: pointer;
    transition: opacity 1s, z-index 0.3s, transform 1s;
    transform: translateX(0);
}

.menu .btn .fab {
    font-size: 3em;
    transition: color 0.3s;
}

.menu .btn:hover .fab {
    color: rgba(255, 255, 255, 0.7);
}

.menu .btn.open {
    opacity: 1;
    z-index: 100;
    cursor: pointer;
    transition: transform 0.3s;
}

.menu .btn.open:hover {
    transform: scale(1.2);
}

.menu .btn.open:hover .line {
    background-color: rgba(255, 255, 255, 0.7);
}

.menu .btn.open:hover .line:before, .menu .btn.open:hover .line:after {
    background-color: rgba(255, 255, 255, 0.7);
}

.menu .btn.open .line {
    width: 60%;
    height: 6px;
    background: #000;
    border-radius: 6px;
    transition: background-color 0.3s, height 0.3s, top 0.3s;
}

.menu .btn.open .line:before, .menu .btn.open .line:after {
    content: "";
    display: block;
    position: absolute;
    left: 0;
    width: 100%;
    height: 6px;
    background: #000;
    border-radius: 6px;
    transition: background-color 0.3s, transform 0.3s;
}

.menu .btn.open .line:before {
    top: -12px;
    transform-origin: 15% 100%;
}

.menu .btn.open .line:after {
    top: 12px;
    transform-origin: 25% 30%;
}

.menu .box {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-origin: 50% 50%;
}

.menu.active .btn-icon {
    opacity: 1;
    z-index: 50;
}

.menu.active .open .line {
    height: 0px;
    top: 45%;
}

.menu.active .open .line:before {
    transform: rotate(45deg);
    width: 110%;
}

.menu.active .open .line:after {
    transform: rotate(-45deg);
    width: 110%;
}

.box:nth-child(1) {
    transform: rotate(-22.5deg);
}

.menu.active .box:nth-child(1) .btn-icon {
    transform: translateY(-10em) rotate(22.5deg);
}

.box:nth-child(2) {
    transform: rotate(22.5deg);
}

.menu.active .box:nth-child(2) .btn-icon {
    transform: translateY(-10em) rotate(-22.5deg);
}

.box:nth-child(3) {
    transform: rotate(67.5deg);
}

.menu.active .box:nth-child(3) .btn-icon {
    transform: translateY(-10em) rotate(-67.5deg);
}

.box:nth-child(4) {
    transform: rotate(112.5deg);
}

.menu.active .box:nth-child(4) .btn-icon {
    transform: translateY(-10em) rotate(-112.5deg);
}

.box:nth-child(5) {
    transform: rotate(157.5deg);
}

.menu.active .box:nth-child(5) .btn-icon {
    transform: translateY(-10em) rotate(-157.5deg);
}

.box:nth-child(6) {
    transform: rotate(202.5deg);
}

.menu.active .box:nth-child(6) .btn-icon {
    transform: translateY(-10em) rotate(-202.5deg);
}

.box:nth-child(7) {
    transform: rotate(247.5deg);
}

.menu.active .box:nth-child(7) .btn-icon {
    transform: translateY(-10em) rotate(-247.5deg);
}

.box:nth-child(8) {
    transform: rotate(292.5deg);
}

.menu.active .box:nth-child(8) .btn-icon {
    transform: translateY(-10em) rotate(-292.5deg);
}