.lds-ring {
    display: inline-block;
    position: relative;
    width: 80px;
    height: 80px;
    top: calc(40% - 40px);
}

.lds-ring div {
    box-sizing: border-box;
    display: block;
    position: absolute;
    width: 64px;
    height: 64px;
    margin: 8px;
    border: 8px solid #fff;
    border-radius: 50%;
    animation: lds-ring 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    border-color: #fff transparent transparent transparent;
}

.lds-ring div:nth-child(1) {
    animation-delay: -0.45s;
}

.lds-ring div:nth-child(2) {
    animation-delay: -0.3s;
}

.lds-ring div:nth-child(3) {
    animation-delay: -0.15s;
}

@keyframes lds-ring {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.loader {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    background: #000000d0;
    z-index: 99999;
    display: flex;
    justify-content: center;
}

.nav-link {
    pointer-events: none;
}

.nav-item {
    transition: all 300ms ease;
    cursor: pointer;
}

.nav-item:hover {
    background-color: #374151;
    border-radius: 8px;
}

.domain {
    width: calc(50% - 20px);
    border: 1px solid #3c3c3c52;
    border-radius: 8px;
    padding: 10px;
    background: white;
    cursor: pointer;
    transition: all 150ms ease;
    margin-bottom: 10px;
    margin-right: 10px;
}

.domain:hover {
    border: 1px solid #7f7f7f;
}

.flex {
    display: flex;
    flex-wrap: wrap;
    justify-content: start;
}

.flex.center {
    margin: 0 auto;
}

@media screen and (max-width: 700px) {
    .domain {
        width: calc(100% - 20px);
        margin: 5px auto;
    }
}

.ml-4 {
    margin-left: 10px;
}

main {
    display: block;
}

.text-bold {
    font-weight: 600;
}

.row.center {
    justify-content: space-around;
}

.center .card-body {
    flex: none;
}

@media screen and (max-width: 993px) {
    .row.col-lg-12.center {
        width: 100%;
        margin-left: 0px;
    }
}

.nav-link {
    display: flex;
}

.float-right {
    float: right;
}

.os {
    padding: 10px;
    background: #e4e4e4;
    border-radius: 5px;
    margin-bottom: 5px;
    margin-right: 5px;
    cursor: pointer;
    transition: all 150ms ease;
}

.os:hover {
    background-color: #d1d1d1;
}

.os.active {
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.5);
}

.oslist {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

#groups span {
    background: white;
    width: auto;
    padding: 10px 15px;
    border-radius: 5px;
    border: 1px solid #e1e2e4;
    cursor: pointer;
    margin-right: 10px;
    margin-bottom: 10px;
}

#groups span:hover {
    background: rgba(255, 255, 255, 0.116);
}

#groups {
    display: flex;
    flex-wrap: wrap;
}