body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f5c6d6;
    overflow: hidden;
    font-family: 'Arial', sans-serif;
}

#calendar-container {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: zoomIn 3s forwards;
}

#calendar {
    width: 150px;
    height: 150px;
    background: white;
    border: 2px solid #333;
    box-shadow: 2px 2px 15px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    text-align: center;
    padding: 10px;
    opacity: 1;
    transition: opacity 1s ease-in-out;
}

.month {
    font-weight: bold;
    font-size: 1.2em;
    margin-bottom: 10px;
}

.days {
    display: flex;
    justify-content: space-around;
    font-size: 1.5em;
}

#target-day {
    color: #e83e8c;
    font-weight: bold;
}

#message {
    display: none;
    font-size: 2em;
    color: white;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

@keyframes zoomIn {
    0% {
        transform: scale(0);
    }
    100% {
        transform: scale(2.0);
    }
}