body {
    background: #f8f9fa;
}
body.dark {
    background: #181a1b;
}
.login-card {
    max-width: 400px;
    margin: 3rem auto;
    box-shadow: 0 2px 16px rgba(0,0,0,0.08);
    border-radius: 12px;
    background: #fff;
    padding: 2rem 2.5rem 2rem 2.5rem;
}
body.dark .login-card {
    background: #23272b;
    color: #f1f1f1;
    box-shadow: 0 2px 16px rgba(0,0,0,0.32);
}
.brand {
    color: #0057b8;
    font-weight: 700;
    letter-spacing: 1px;
}
body.dark .brand {
    color: #90caf9;
}
.links {
    margin-top: 2rem;
}
body.dark .links {
    color: #b0b0b0;
}