* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;

    display: flex;
    justify-content: center;
    align-items: center;

    background: #111;
    color: white;

    font-family: Arial, sans-serif;
}

.login-box {
    width: 340px;
    max-width: calc(100% - 32px);

    padding: 40px;

    background: #202020;
    border-radius: 15px;

    text-align: center;
}

.login-box h1 {
    margin-bottom: 10px;
}

.login-box p {
    color: #aaa;
}

input {
    width: 100%;
    padding: 14px;
    margin-top: 15px;

    border: 1px solid #444;
    border-radius: 7px;

    background: #303030;
    color: white;
}

button {
    width: 100%;
    padding: 14px;
    margin-top: 20px;

    border: none;
    border-radius: 7px;

    background: #007bff;
    color: white;

    cursor: pointer;
}

button:hover {
    background: #0056b3;
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

#message {
    color: #ff5555;
    font-size: 14px;
}