.btn-base {
    background-color: #00000000;
    border: 1px solid #404040;
}

.btn-big-base {
    margin-left: 15px;
}

.btn-base:hover,
.btn-base:focus{
    background-color: #ddd;
    opacity: 0.8;
}

.btn-report {
    border-color: #6777db;
}