body {
    font-family: Arial, sans-serif;
    background-color: #121212;
    color: #fff;
    text-align: center;
    margin: 0;
    padding: 50px;
}

.container {
    background: #222;
    padding: 20px;
    border-radius: 10px;
    display: inline-block;
}

input, button {
    padding: 10px;
    margin: 10px;
    font-size: 16px;
    border-radius: 5px;
}

button {
    background-color: #ff4757;
    color: white;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #e84118;
}

.error {
    color: red;
}