body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
}
.container {
    max-width: 600px;
    margin: auto;
    padding: 20px;
    background: #fff;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}
h1 {
    text-align: center;
}
input, select {
    width: calc(100% - 10px);
    margin: 10px 0;
    padding: 10px;
}
button {
    width: 100%;
    padding: 10px;
    background: #28a745;
    color: #fff;
    border: none;
    cursor: pointer;
}
button:hover {
    background: #218838;
}
ul {
    list-style: none;
    padding: 0;
}
li {
    background: #e9ecef;
    margin: 5px 0;
    padding: 10px;
    border-radius: 5px;
}