* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    interpolate-size: allow-keywords;
}

body {
    height: 100%;
    width: 100%;
}

.main-box {
    height: auto;
    width: 50%;
    margin: 10vh auto;
}

.box {
    height: auto;
    width: 100%;
}

.box .heading {
    border: 1px solid black;
    height: auto;
    width: 100%;
    padding: 1rem;
    text-align: center;
    cursor: pointer;
}

.box .data {
    border: 1px solid black;
    height: 0;
    width: 100%;
    overflow: hidden;
    transition: height 0.5s ease;
}

.data p {
    margin: 1rem;
}

.box .data.active {
    height: auto;
}