.font-size-control {
    position: fixed;
    bottom: 80px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 9999;
}

.font-size-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background-color: #007bff;
    color: white;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    transition: background-color 0.3s, transform 0.2s;
}

.font-size-btn:hover {
    background-color: #0056b3;
    transform: scale(1.1);
}

.font-size-btn:active {
    transform: scale(0.95);
}

.font-size-btn i {
    font-weight: bold;
}