body {
    font-family: 'Arial', sans-serif;
    background-color: #f4f4f4;
    color: #333;
    margin: 0;
    padding: 0;
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    padding: 30px;
    background-color: #ffffff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
}

h1 {
    color: #2c3e50;
    font-size: 2.5em;
    margin-bottom: 15px;
}

h2 {
    color: #2980b9;
    border-bottom: 2px solid #2980b9;
    padding-bottom: 10px;
    margin-top: 25px;
    font-size: 1.8em;
}

h3 {
    color: #34495e;
    margin-top: 20px;
    font-size: 1.5em;
}

p {
    line-height: 1.8;
    margin-bottom: 20px;
}

ul {
    margin-left: 20px;
}

a {
    color: #2980b9;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 2em;
    }

    h2 {
        font-size: 1.5em;
    }

    h3 {
        font-size: 1.2em;
    }

    p {
        line-height: 1.5;
    }
}

.button {
    display: inline-block;
    padding: 10px 20px;
    background-color: #2980b9;
    color: #ffffff;
    text-align: center;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 15px;
    transition: background-color 0.3s;
}

.button:hover {
    background-color: #3498db;
}