/* Reset default browser styles */
body,
h1,
h2,
p,
ul {
    margin: 0;
    padding: 0;
}

/* Global styles */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    background-color: #f7f7f7;
    color: #333;
}

header {
    background-color: #000;
    color: #fff;
    padding: 20px;
}

header h1 {
    font-size: 24px;
    font-weight: bold;
}

main {
    padding: 20px;
}

h2 {
    font-size: 20px;
    margin-top: 20px;
    margin-bottom: 10px;
}

p {
    margin-bottom: 15px;
}

ul {
    list-style-type: none;
    margin-bottom: 15px;
}

li {
    padding-left: 20px;
    position: relative;
}

li::before {
    content: '\2022';
    position: absolute;
    left: 0;
    color: #007aff; /* Apple's blue color */
}

/* Responsive styles */
@media (max-width: 768px) {
    header h1 {
        font-size: 20px;
    }

    h2 {
        font-size: 18px;
    }

    p {
        font-size: 16px;
    }
}