body {
    font-family: "Segoe UI", sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
    color: #333;
}

header {
    background: #4CAF50;
    color: white;
    padding: 15px 0;
    text-align: center;
    font-size: 1.5em;
}

main {
    max-width: 800px;
    margin: 20px auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

section {
    margin-bottom: 30px;
}

h2 {
    border-left: 5px solid #4CAF50;
    padding-left: 10px;
    margin-bottom: 10px;
}

input, textarea, button {
    display: block;
    width: 100%;
    margin-top: 10px;
    padding: 10px;
    font-size: 1em;
}

button {
    background: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #45a049;
}

ul {
    list-style: none;
    padding: 0;
}

li {
    padding: 8px;
    background: #f9f9f9;
    margin-bottom: 5px;
    border-radius: 5px;
}

footer {
    text-align: center;
    padding: 10px;
    font-size: 0.9em;
    color: #777;
}