/* Nền mờ */
.alert-popup {
    display: flex;
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.4);
    justify-content: center;
    align-items: center;
    z-index: 3000;
}

/* Khung chính */

.alert-box {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.25);
    
   
    max-width: 90%; /* Vẫn giữ để đảm bảo đẹp trên điện thoại */
    text-align: center;
    overflow: hidden;
    animation: popupFade 0.25s ease;
}

/* Header theo màu */
.alert-header {
    font-weight: 600px;
    padding: 10px;
    color: #fff;
}

.alert-body {
    padding: 20px 15px;
    color: #333;
}

.alert-footer {
    padding: 10px 0 20px;
}

/* Animation */
@keyframes popupFade {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}