body, html {
    height: 100%;
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: offwhite;
}

.app {
    text-align: center;
}

#mood {
    font-size: 5rem;
    margin-bottom: 20px;
}

button {
    font-size: 1.25rem;
    padding: 10px 20px;
    cursor: pointer;
    background-color: #0084ff;
    color: white;
    border: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

button:hover {
    background-color: #0056b3;
}

@keyframes pop {
    0% { transform: scale(0.5); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

#mood {
    animation: pop 0.5s ease;
}