body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f5f5;
    color: #333333;
    margin: 0;
    padding: 0;
    text-align: center;
    transition: background-color 0.3s, color 0.3s;
}

header, section {
    margin: 20px auto;
    padding: 20px;
    background-color: #ffffff;
    color: #333333;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    max-width: 800px;
    transition: background-color 0.3s, color 0.3s;
}

h1, h2 {
    color: inherit;
}

ul {
    list-style-position: inside;
    padding-left: 0;
    text-align: left;
    display: inline-block;
    margin: 0;
    padding: 0;
}

ul li {
    list-style: disc inside;
    margin-left: 1em;
    padding-left: 0.5em;
    text-indent: -0.5em;
}

p, li {
    color: inherit;
}

button {
    background-color: #0078d7;
    color: #ffffff;
    border: none;
    padding: 10px 20px;
    margin: 10px;
    cursor: pointer;
    border-radius: 5px;
    font-size: 16px;
    transition: background-color 0.3s, color 0.3s;
}

button:hover {
    background-color: #005bb5;
}

strong {
    color: inherit;
}

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

body.dark-mode header, body.dark-mode section {
    background-color: #1e1e1e;
    color: #ffffff;
}

body.dark-mode h1, body.dark-mode h2,
body.dark-mode p, body.dark-mode ul, body.dark-mode li,
body.dark-mode strong {
    color: inherit;
}

body.dark-mode button {
    background-color: #333333;
    color: #ffffff;
}

body.dark-mode button:hover {
    background-color: #444444;
}