body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

h1, h2 {
    color: #333;
    margin-bottom: 20px;
}

form {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    color: #555;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 8px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box;
}

button {
    background-color: #4CAF50;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

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

.error {
    color: #dc3545;
    padding: 10px;
    margin-bottom: 20px;
    background-color: #f8d7da;
    border-radius: 4px;
}

.success {
    color: #28a745;
    padding: 10px;
    margin-bottom: 20px;
    background-color: #d4edda;
    border-radius: 4px;
}

.file-list {
    list-style: none;
    padding: 0;
}

.file-list li {
    padding: 10px;
    border-bottom: 1px solid #eee;
}

.file-list li:last-child {
    border-bottom: none;
}

.file-list a {
    color: #007bff;
    text-decoration: none;
}

.file-list a:hover {
    text-decoration: underline;
}

.logout-form {
    text-align: right;
    margin-bottom: 20px;
}

.logout-form button {
    background-color: #dc3545;
}

.logout-form button:hover {
    background-color: #c82333;
}