body {
    font-family: Arial, sans-serif;
    background: #f0f0f0;
    padding: 50px;
}

.container {
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    width: 300px;
    margin: 50px auto; 
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    box-sizing: border-box;
}

input, button {
    width: 100%;            
    box-sizing: border-box; 
    margin: 10px 0;        
    padding: 8px;
    border-radius: 4px;
    border: 1px solid #ccc;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    background-color: #45a049;
}

ul {
    padding-left: 20px;
}

p.error {
    color: red;
}

form {
    display: flex;
    flex-direction: column;
}