* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background-color: #f4f6f8;
    color: #333;
    line-height: 1.9;
    padding: 20px;
}

main {
    max-width: 1100px;
    margin: auto;
}

h1 {
    font-size: 42px;
    font-weight: bold;
    margin-bottom: 15px;
}

h2 {
    font-size: 30px;
    font-weight: 600;
    margin-top: 35px;
    margin-bottom: 20px;
    color: #2c3e50;
}

h3 {
    font-size: 22px;
    font-weight: 600;
    margin-top: 25px;
    margin-bottom: 12px;
}

p {
    font-size: 19px;
    margin-bottom: 18px;
}

article {
    background: #ffffff;
    padding: 35px;
    border-radius: 10px;
    margin-bottom: 35px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

section {
    background: #ffffff;
    padding: 35px;
    border-radius: 10px;
    margin-bottom: 35px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

footer {
    text-align: center;
    padding: 30px 20px;
    font-size: 16px;
    margin-top: 50px;
    background: #2c3e50;
    color: white;
    border-radius: 8px;
}

footer p {
    margin-bottom: 8px;
}

footer a {
    color: #f1c40f;
    text-decoration: none;
    margin: 0 8px;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {

    body {
        padding: 12px;
    }

    h1 {
        font-size: 30px;
    }

    h2 {
        font-size: 24px;
    }

    h3 {
        font-size: 20px;
    }

    p {
        font-size: 17px;
    }

    article {
        padding: 20px;
    }

    section {
        padding: 20px;
    }

    footer {
        padding: 20px 15px;
        font-size: 14px;
    }
}