body {
    font-family: 'Vazir', 'Vazirmatn', Tahoma, sans-serif;
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
}

.login-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

    .login-header i {
        font-size: 3.5rem;
        color: #3498db;
    }

.btn-login {
    width: 100%;
    padding: 12px;
    font-size: 1.1rem;
    font-weight: bold;
}