header {
    background-color: #1c1c1c;
    color: white;
}

.content_wrapper {
    background: #232323;
}

h1, h2 {
    color: white;
}

.group {
    background-color: rgba(0,0,0,.1);
}

.block {
    background-color: #333333;
    color: white;
}

.block:hover {
    background-color: #1c1c1c;
    box-shadow: none;
}

.sidebar {
    background: #333333;
    color: white;
}

.sidebar li:hover {
    background: rgba(0,0,0,.2);
}

.sidebar .current {
    background: rgba(0,0,0,.1);
}

.sidebar li::after {
    background-color: #e53935;
}