body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #e9ecef;
    color: #333;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}
.container {
    max-width: 700px;
    text-align: center;
    padding: 40px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
header h1 {
    color: #004085;
    margin-top: 0;
    font-size: 2.5em;
}
main p {
    font-size: 1.1em;
    color: #495057;
}
.login-link {
    margin-top: 40px;
}
.btn {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 12px 25px;
    font-size: 1.1em;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.2s;
}
.btn:hover {
    background-color: #0056b3;
}
footer {
    margin-top: 40px;
    font-size: 0.9em;
    color: #6c757d;
}