.alert-success {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1050;
    padding: 20px 16px;
    background-color: #28a745;
    color: white;
    font-size: 1.2rem;
    text-align: center;
    font-weight: bold;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    opacity: 0;
    transform: translateY(-100%);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.alert-success.show {
    opacity: 1;
    transform: translateY(0);
}

.alert-success.fade-out {
    opacity: 0;
    transform: translateY(-100%);
}

.alert-success .btn-close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: white;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.alert-success .btn-close:hover {
    opacity: 1;
}