.alert-box {
    position: fixed;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    background-color: #f44336;
    color: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    opacity: 0;
    pointer-events: none;
}

.alert-box.hidden {
    display: none;
}

.btn-close {
    outline: none;
    box-shadow: none; 
}