body {
    font-family: Arial, sans-serif;
    background: #f4f6f8;
    margin: 0;
    padding: 0;
}
.login-box {
    width: 360px;
    margin: 80px auto;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.08);
    padding: 30px;
}
.login-box h2 {
    margin: 0 0 15px;
    font-size: 22px;
}
label { display: block; margin-top: 10px; font-weight: bold; }
input[type=text], input[type=password] {
    width: 100%;
    padding: 10px;
    margin-top: 6px;
    border-radius: 4px;
    border: 1px solid #d0d7de;
    box-sizing: border-box;
}
button {
    margin-top: 15px;
    width: 100%;
    padding: 10px;
    border: none;
    border-radius: 6px;
    background: #1976d2;
    color: white;
    font-weight: bold;
    cursor: pointer;
}
.error {
    background: #ffefef;
    color: #cc0000;
    padding: 8px;
    border-radius: 4px;
    margin-bottom: 10px;
}
.container {
    max-width: 100%;
    margin: 10px auto;
    background: #fff;
    padding: 10px;
    border-radius: 8px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.06);
}
a { color: #1976d2; text-decoration: none; }