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

.header {
    background-color: #333;
    color: white;
    padding: 0.5rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header h1 {
    margin: 0;
}

#logoutButton {
    width: auto;
    padding: 0.5rem 1rem;
}

.container {
    display: flex;
}

.left-menu {
    width: 200px;
    background-color: #f4f4f4;
    padding: 1rem;
}

.left-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.left-menu li {
    margin-bottom: 1rem;
}

.left-menu a {
    text-decoration: none;
    color: #333;
    display: block;
    padding: 0.5rem;
    border-radius: 4px;
}

.left-menu a:hover {
    background-color: #ddd;
}

.content {
    flex-grow: 1;
    padding: 1rem;
}

.login-container {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    width: 300px;
    margin: 2rem auto;
}
h2 {
    margin-top: 0;
    text-align: center;
    color: #333;
}
.form-group {
    margin-bottom: 1rem;
}
label {
    display: block;
    margin-bottom: 0.5rem;
    color: #555;
}
input {
    width: 100%;
    padding: 0.5rem;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 4px;
}
button {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 4px;
    background-color: #007bff;
    color: white;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
}
button:hover {
    background-color: #0056b3;
}
#message {
    margin-top: 1rem;
    text-align: center;
    font-weight: bold;
}
.success {
    color: #28a745;
}
.error {
    color: #dc3545;
}