body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
}

nav {
    background-color: #333;
    color: #fff;
    padding: 1rem;
}

nav ul {
    list-style-type: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin-right: 1rem;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
    padding: 2rem 0;
}

form {
    background: #f4f4f4;
    padding: 2rem;
    margin-bottom: 1rem;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    display: block;
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 1rem;
}

button {
    display: inline-block;
    background: #333;
    color: #fff;
    padding: 0.5rem 1rem;
    border: none;
    cursor: pointer;
}

button:hover {
    background: #555;
}

button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.flashes {
    list-style-type: none;
    padding: 1rem;
    background: #f4f4f4;
    margin-bottom: 1rem;
}

.flashes li {
    color: #333;
    margin-bottom: 0.5rem;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    text-align: left;
}

th {
    background-color: #f4f4f4;
}

.subscription-container {
    max-width: 800px;
    margin: 0 auto;
}

.subscription-info {
    text-align: center;
    margin-bottom: 2rem;
}

.subscription-plans {
    display: flex;
    justify-content: space-between;
}

.plan {
    background-color: #f4f4f4;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 1rem;
    width: 45%;
}

.plan h3 {
    text-align: center;
}

.plan ul {
    list-style-type: none;
    padding: 0;
}

.plan ul li {
    margin-bottom: 0.5rem;
}

.plan .price {
    font-size: 1.5rem;
    text-align: center;
    font-weight: bold;
}

.upgrade-button {
    background-color: #4CAF50;
    color: white;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 1rem;
    display: block;
    width: 100%;
    margin-top: 1rem;
}

.upgrade-button:hover {
    background-color: #45a049;
}

.payment-success, .payment-cancel {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.payment-success h1, .payment-cancel h1 {
    color: #4CAF50;
}

.payment-cancel h1 {
    color: #f44336;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 3px;
    margin-top: 1rem;
}

.btn-primary {
    background-color: #007bff;
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
}