body {
    background-color: white;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    text-align: center;
}

.christmas-tree {
    width: 300px;
    height: auto;
    margin-bottom: 20px;
}

.gifts {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 10px;
}

.gift {
    width: 100px;
    height: auto;
    cursor: pointer;
    transition: transform 0.3s;
}

.gift:hover {
    transform: scale(1.1);
}

.instruction {
    font-size: 18px;
    color: #333;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    justify-content: center;
    align-items: center;
}

.modal-content {
    text-align: center;
    background-color: white;
    padding: 20px;
    border-radius: 10px;
}

.selected-gift {
    width: 300px;
    height: auto;
    cursor: pointer;
}

#modal-instruction {
    font-size: 20px;
    margin-top: 10px;
    color: #333;
}

.letter {
    display: none;
    font-size: 18px;
    margin-top: 20px;
    padding: 20px;
    background-color: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 5px;
    max-width: 400px;
    margin: 20px auto;
}