body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0;
    background-color: #ffffff;
}

.container {
    width: 85vw;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

.rectangle {
    width: 100%;
    aspect-ratio: 4 / 5;
    background-color: rgb(255, 255, 250);
    box-shadow: 0px 0px 5px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transition: opacity 0.3s;
    cursor: pointer;
}

#hidden-text {
    position: fixed;
    bottom: 50%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 20px;
    color: rgb(0, 0, 0);
    pointer-events: none;
}

#hidden-text span {
    opacity: 0; /* Start completely hidden */
    transition: opacity 0.5s ease-in-out;
}

.text-container {
    text-align: center;
    padding: 20px;
}

button {
    margin-top: 20px;
    padding: 10px;
    font-size: 16px;
    cursor: pointer;
}