.error-message {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    border-radius: 0;
    padding: 15px;
    font-size: 16px;
    text-align: center;
    z-index: 1000;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.5s ease-in-out;
}

.success-message {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
    border-radius: 0;
    padding: 15px;
    font-size: 16px;
    text-align: center;
    z-index: 1000;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
    animation: fadeIn 0.5s ease-in-out;
}

.warning-message {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
    border-radius: 0;
    padding: 20px;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    z-index: 1001;
    box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.15);
    animation: slideDown 0.5s ease-in-out;
}

.error-message.visible,
.success-message.visible,
.warning-message.visible {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}