body {
    background: #0f0c29;
    background: linear-gradient(to right, #24243e, #302b63, #0f0c29);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.glass-container {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 40px;
    border-radius: 25px;
    text-align: center;
    box-shadow: 0 15px 35px rgba(0,0,0,0.5);
    width: 320px;
}

.btn-fb {
    background: #1877f2;
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
    width: 100%;
}

.balance-card {
    background: rgba(0, 255, 0, 0.1);
    border: 1px dashed #4caf50;
    margin: 20px 0;
    padding: 10px;
    border-radius: 10px;
}