.tab {
    display: none;
}

.regex-result {
    height: 40px;
    margin: 0 0 0 0;
    border: 1px solid;
    padding: 0 10px;
    display: flex;
    align-items: center;
    color: white;
    border-radius: .25rem;
    justify-content: center;
    width: 100px;
}

.box {
    background-color: white;
    box-shadow: 0 0 4px #D8D8D8;
    border: 1px solid #f8f8f8;
    border-radius: .25rem;
}

.z-auto {
    z-index: auto;
}

.z-1 {
    z-index: 1;
}

.z-10 {
    z-index: 10;
}

.z-20 {
    z-index: 20;
}

mark {
    padding: 0;
}