body {
    font-family: Vazirmatn;
    background: linear-gradient(135deg, #4e73df, #1cc88a);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-card {
    width: 420px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}

.logo {
    font-size: 28px;
    font-weight: bold;
    color: #4e73df;
}