body {
    background: #f4f6f9;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    font-family: sans-serif;
}
.login-card {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    background: white;
}
.brand-logo { text-align: center; margin-bottom: 2rem; }