body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    position: relative;
    height: 100vh;
    margin: 0;
    background-color: #ffffff;
}

.card {
    position: absolute;
    top: 20vh;
    left: 50%;
    transform: translateX(-50%);
    max-width: 500px;
    text-align: center;
    border: none;
    background: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card-body {
    min-height: 220px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card h1 {
    font-size: 24px;
    margin-top: 0;
}

.card p {
    margin: 8px 0;
}

.shuffle-btn {
    display: block;
    margin: 20px auto 0;
    background: none;
    border: none;
    cursor: pointer;
}
.shuffle-btn img {
    width: 32px;
    height: 32px;
}

.share-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: none;
    border: none;
    cursor: pointer;
}
.share-btn img {
    width: 32px;
    height: 32px;
}