body {
    font-family: Arial;
    background: #eef3ff;
    margin: 0;
    padding: 0;
}

.container {
    width: 400px;
    background: white;
    padding: 20px;
    border-radius: 10px;
    margin: 60px auto;
    box-shadow: 0 0 10px #aaa;
}

.center {
    text-align: center;
}

.btn {
    display: block;
    padding: 10px;
    background: #2b6ef2;
    color: white;
    text-decoration: none;
    margin: 10px 0;
    border-radius: 5px;
    text-align: center;
}

.btn.small {
    padding: 5px;
}

.error {
    padding: 10px;
    background: #ffcccc;
    color: #900;
    margin-bottom: 10px;
}

.success {
    padding: 10px;
    background: #c6ffcc;
    color: #006600;
    margin-bottom: 10px;
}

input, select {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
}

.logout {
    display: inline-block;
    margin-top: 20px;
    color: #ff0000;
    text-decoration: none;
}

footer {
    margin-top: 20px;
    text-align: center;
    font-size: 12px;
}