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

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
    background-color: rgb(241, 241, 241);
    font-family: Arial, Helvetica, sans-serif;
}

.slider {
    width: 300px;
    height: 200px;
    overflow: hidden;
    border-radius: .8rem;
    box-shadow: 5px 5px 5px #d6d6d6;
    position: relative;
}

.box {
    font-size: 5rem;
    width: 100%;
    height: 100%;
    background-color: #3c8cb1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    color: white;
    left: -600%;
    transition: all ease .5s;
}

.box:nth-child(odd) {
    background-color: #dc1c1c;
}

.show-box {
    left: 0;
}

button {
    padding: .5rem;
    font-size: 1rem;
}