body {
    font-family: Arial, sans-serif;
    background-color: #f7f7f7;
    color: #333;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 800px;
    margin: 50px auto;
    background-color: #fff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s, color 0.3s;
}

h1 {
    text-align: center;
    color: #2c3e50;
}

p {
    margin-bottom: 20px;
}

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

a:hover {
    text-decoration: underline;
}

.dark-mode body {
    background-color: #121212;
    color: #e0e0e0;
}

.dark-mode .container {
    background-color: #1e1e1e;
    color: #e0e0e0;
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.05);
}

.toggle-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    background-color: #007bff;
    color: #fff;
    border: none;
    padding: 10px 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
    z-index: 1000;
}

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