/* ベースのスタイル */
body {
    font-family: Arial, sans-serif;
    background: #f5f5f5;
    margin: 0;
    padding: 2rem;
    color: #333;
}

h1 {
    text-align: center;
    margin-bottom: 1rem;
}

input[type="text"] {
    padding: 0.5rem;
    font-size: 1rem;
    width: 70%;
    max-width: 300px;
    margin-right: 0.5rem;
}

button {
    padding: 0.5rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
}

button:hover {
    background-color: #0056b3;
}

#errorMsg {
    color: red;
    margin-top: 0.5rem;
}

ul {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
}

li {
    background: white;
    margin-bottom: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

li span {
    margin-right: 1rem;
}

li button {
    background-color: #dc3545;
}

li button:hover {
    background-color: #c82333;
}