body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    font-family: 'Arial', sans-serif;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background-color: #333;
    color: white;
}

header img.logo {
    width: 100px; /* ロゴのサイズは調整してください */
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

#hero {
    background-color: #4CAF50;
    color: white;
    padding: 100px 0;
    text-align: center;
}

#about, #contact {
    padding: 50px 20px;
    text-align: center;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 20px 0;
}

form {
    display: flex;
    flex-direction: column;
    max-width: 400px;
    margin: auto;
}

form input, form textarea, form button {
    margin: 10px 0;
    padding: 10px;
}

form button {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
}