body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    background-color:aqua;
}

.login-box {
    background: white;
    padding: 30px;
    width: 300px;
    border:3px solid black;
}

h1 {
    text-align: center;
}

input {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    box-sizing: border-box;
}

button {
    width: 100%;
    padding: 10px;
    margin-top: 15px;
    cursor: pointer;
}

.error {
    color: red;
    text-align: center;
    margin-top: 10px;
}