.container {
    text-align: center;
    z-index: 1;
}

.heart {
    position: fixed;
    font-size: 3rem;
    user-select: none;
    animation: float 5s linear infinite;
}

@keyframes float {
    0% {
        transform: translateY(100vh) scale(1);
        opacity: 1;
    }
    100% {
        transform: translateY(-100vh) scale(0.5);
        opacity: 0;
    }
}

.hidden-box {
    display: none;
    padding: 15px;
    margin-top: 20px;
    font-size: 1.5rem;
    text-align: center;
    color: white;
    border-radius: 5px;
    transition: background-color 0.3s ease-in-out;
}

.hidden-box.visible {
    display: block;
}

.judgment-message {
    margin-top: 10px;
    font-size: 1.2rem;
    text-align: center;
    font-style: italic;
}