body {
    background: #0a0a0a;
    color: #fff;
    font-family: Arial;
    text-align: center;
}

.login-box, .panel {
    width: 350px;
    margin: 60px auto;
    padding: 20px;
    background: #111;
    border-radius: 8px;
    box-shadow: 0 0 10px cyan;
}

input, button {
    width: 95%;
    padding: 10px;
    margin: 8px 0;
    border: none;
    border-radius: 6px;
}

button {
    background: cyan;
    color: black;
    font-weight: bold;
    cursor: pointer;
}

button:hover {
    background: white;
}

.btn {
    display: block;
    background: cyan;
    color: black;
    padding: 10px;
    margin: 10px auto;
    width: 80%;
    border-radius: 6px;
    text-decoration: none;
}

.logout {
    background: red;
    color: #fff !important;
}

label {
    float: left;
    margin-top: 5px;
}

.ok {
    color: #0f0;
}

.error {
    color: red;
}