mysql_1

.container {
    box-sizing: border-box;
    width: 100%;
    padding: 1rem;
    border: 1px solid black;
}

.tabs-container {
    display: inline-block;
    width: calc(100% - 4.6rem);
}

.btn-container {
    display: inline-block;
    width: 4.3rem;
}

.tab {
    box-sizing: border-box;
    float: left;
    width: calc(20% - 0.2rem);
    height: 4rem;
    line-height: 4rem;
    border: 1px solid darkblue;
    text-align: center;
    vertical-align: middle;
    font-size: 2.5rem;
    margin: 0 0.1rem;
}

.add-btn {
    box-sizing: border-box;
    float: left;
    width: 4rem;
    height: 4rem;
    line-height: 4rem;
    background: green;
    text-align: center;
    vertical-align: middle;
    font-size: 30px;
    color: white;
    font-weight: bold;
    cursor: pointer;
    margin: 0px;
    margin-left: 0.3rem;
    user-select: none;
}

a {
    user-select: none;
    text-decoration: none;
    color: red;
}