html, body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #333;
    color: white;
    padding: 10px 20px;
}

h1 {
    margin: 0;
}

.user-info {
    margin-left: auto;
    font-weight: bold;
}

.container {
    max-width: 400px;
    margin: 50px;
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h2 {
    text-align: center;
    color: #333;
}

label {
    display: block;
    margin: 10px 0 5px;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 10px;
    margin: 5px 0 20px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    width: 100%;
    padding: 10px;
    background-color: #5cb85c;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #4cae4c;
}

.error {
    color: red;
    text-align: center;
}
nav ul {
    list-style-type: none;
    padding: 0;
}

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

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