:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --background-color: #f4f7f6;
    --text-color: #333;
    --font-size-base: 1rem;
    --font-size-heading: 2.5em;
    --max-width: 1200px;
}
body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6;
    color: #333;
    font-size: 1rem;
}

.container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    padding: 20px;
    box-sizing: border-box;
}

header {
    background-color: #3498db;
    color: white;
    padding: 15px;
    text-align: center;
    border-radius: 8px;
}

header h1 {
    margin: 0;
    font-size: 2.5em;
}

main {
    margin-top: 20px;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

section {
    margin-bottom: 20px;
}


@media (max-width: 480px) {
    body {
        font-size: 14px;
    }

    header h1 {
        font-size: 1.8em;
    }

    .container {
        width: 95%;
    }

    main {
        padding: 10px;
    }

    section {
        margin-bottom: 15px;
    }
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }

    .container {
        width: 90%;
    }

    main {
        padding: 15px;
    }
}

@media (max-width: 992px) {
    header h1 {
        font-size: 2.2em;
    }

    .container {
        width: 85%;
    }

    main {
        padding: 20px;
    }
}

@media (max-width: 1200px) {
    .container {
        width: 80%;
    }

    header h1 {
        font-size: 2.4em;
    }
}

@media (min-width: 1201px) {
    .container {
        width: 70%;
    }

    header h1 {
        font-size: 2.8em;
    }

    main {
        padding: 30px;
    }
}

a {
    color: #3498db;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

button {
    background-color: #3498db;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #2980b9;
}