body {
    background-color: #F7F7F7;
}

.alert {
    padding: 15px;
    margin-bottom: 20px;
    border: 1px solid transparent;
    border-radius: 4px;
}

.alert-error {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.alert-warning {
    color: #856404;
    background-color: #fff3cd;
    border-color: #ffeeba;
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.coupon-details {
    margin: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background: #f9f9f9;
}

.coupon-details p {
    margin: 10px 0;
    line-height: 1.5;
}

.coupon-details h2 {
    margin-bottom: 15px;
    color: #333;
}

.btn {
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 18px;
}

.btn-primary {
    background-color: #752733;
    border-color: #752733;
    color: white;
}

.btn-primary:hover {
    background-color: #5e1f29;
    border-color: #5e1f29;
}

.btn-primary:disabled {
    background-color: #752733;
    border-color: #752733;
}

.btn-secondary {
    background: #6c757d;
    color: white;
    border: 1px solid #545b62;
}

.warning-message {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    padding: 10px;
    margin: 10px 0;
    border-radius: 4px;
    font-weight: bold;
}

button[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
}

.extend-form {
    margin: 15px 0;
    padding: 10px;
    background: #f8f9fa;
    border-radius: 4px;
}

.extend-form input[type="number"] {
    width: 100px;
    padding: 5px;
    margin-right: 10px;
}

.card {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,.08);
}

.col-auto {
    min-width: 135px;
}

.form-control {
    max-width: 650px;
}