body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    transition: background 0.3s, color 0.3s;
}
header, section, footer {
    padding: 20px;
}
header {
    background: #000;
    color: #fff;
}
nav ul {
    list-style: none;
    display: flex;
    gap: 1rem;
}
#hero {
    background: #dc0005;
    color: white;
    text-align: center;
    padding: 40px 20px;
}
.light-mode {
    background: #fff;
    color: #000;
}
.dark-mode {
    background: #121212;
    color: #f0f0f0;
}
footer {
    background: #000;
    color: #fff;
    text-align: center;
}
form input, form textarea {
    display: block;
    margin: 10px 0;
    width: 100%;
    padding: 8px;
}
form button {
    background: #004aad;
    color: white;
    border: none;
    padding: 10px 20px;
    cursor: pointer;
}