body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f5f7;
    color: #1d1d1f;
}

header {
    background-color: #000;
    color: #fff;
    padding: 20px 0;
    text-align: center;
}

.logo {
    width: 50px;
    vertical-align: middle;
}

nav h1 {
    display: inline;
    font-size: 24px;
    margin-left: 10px;
}

main {
    padding: 20px;
    text-align: center;
}

.welcome h2 {
    font-size: 28px;
    margin-bottom: 10px;
}

.welcome p {
    font-size: 18px;
    margin-bottom: 20px;
}

button {
    background-color: #0070c9;
    color: #fff;
    border: none;
    padding: 15px 30px;
    font-size: 18px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

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

.tutorial h2 {
    font-size: 28px;
    margin-bottom: 20px;
}

.tutorial ol {
    list-style: none;
    padding: 0;
}

.tutorial li {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin-bottom: 20px;
    padding: 20px;
    text-align: left;
}

.tutorial li h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.tutorial li p {
    font-size: 16px;
    margin-bottom: 10px;
}

.tutorial img {
    width: 100%;
    max-width: 300px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
}

footer {
    background-color: #000;
    color: #fff;
    padding: 10px 0;
    text-align: center;
    position: fixed;
    width: 100%;
    bottom: 0;
}