:root {
    --primary-color: #28bf96;
    --primary-color-dark: #209677;
    --text-dark: #111827;
    --text-light: #6b7280;
    --white: #ffffff;
}

body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin-top: 20px;
}

.container {
    max-width: 600px;
    width: 100%;
    padding: 20px;
    box-sizing: border-box;    
}

.payment-section {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    padding: 20px;
}

.payment-section h2 {
    margin-top: 0;
    font-weight: 700;
    color: #333;
}

.payment-form {
    display: flex;
    flex-direction: column;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 700;
    color: #333;
}

.form-group input[type="text"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
}

.btn-submit {
    padding: 1rem 2rem;
    outline: none;
    border: none;
    font-size: 1rem;
    color: var(--white);
    background-color: var(--primary-color);
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s;
}
  

.btn-submit:hover {
    background-color: var(--primary-color-dark);
}

.error {
    color: #ff0000;
    margin-top: 15px;
    font-size: 14px;
}