* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}

body {
    font-size: 18px;
    color: black;
    line-height: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f5f5f5;
}

.tab--btn-wrap {
    box-shadow: 0 5px 14px rgba(0, 0, 0, 0.3);
    background-color: #fff;
    border-radius: 5px;
    position: relative;
    margin-bottom: 50px;
}

.tab--slide-line {
    height: 2px;
    background-color: red;
    position: absolute;
    bottom: 0;
}

.tab--btn {
    color: black;
    text-decoration: none;
    font-weight: 500;
    padding: 14px 20px;
    display: inline-block;
}