.flash-messages {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid transparent;
    border-radius: 4px;
    color: #fff;
    min-width: 300px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.alert-error {
    background-color: #e74c3c;
    border-color: #c0392b;
}

.alert-warning {
    background-color: #f1c40f;
    border-color: #f39c12;
    color: #333;
}

.alert-success {
    background-color: #2ecc71;
    border-color: #27ae60;
}

.alert-info {
    background-color: #3498db;
    border-color: #2980b9;
}