body {
            /* background: radial-gradient(circle at top left, #6a11cb, #2575fc); */
            background-image: url("/img/bg3.jpg");
            background-size: cover;
            /* Menutupi seluruh area */
            background-position: center;
            /* Memusatkan gambar */
            background-repeat: no-repeat;
            /* Menghindari pengulangan gambar */
            height: 100vh;
            /* Memastikan body memiliki tinggi penuh */
            font-family: 'Poppins', sans-serif;
            height: 100vh;
            margin: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            overflow: hidden;
        }

        .login-card {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            backdrop-filter: blur(15px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
            width: 100%;
            max-width: 420px;
            padding: 40px 35px;
            color: #fff;
            position: relative;
            z-index: 10;
        }

        .login-card::before {
            content: "";
            position: absolute;
            top: -50px;
            right: -50px;
            width: 120px;
            height: 120px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            filter: blur(30px);
            z-index: -1;
        }

        .login-card::after {
            content: "";
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 140px;
            height: 140px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 50%;
            filter: blur(40px);
            z-index: -1;
        }

        .login-card h4 {
            font-weight: 700;
            font-size: 2rem;
            margin-bottom: 1.5rem;
            letter-spacing: 0.15em;
            text-transform: uppercase;
            color: #f0f0f0;
            text-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
            text-align: center;
        }

        label {
            font-weight: 600;
            color: #eaeaea;
        }

        .form-control {
            background: rgba(255, 255, 255, 0.15) !important;
            border: none !important;
            border-radius: 10px !important;
            padding: 12px 15px !important;
            color: #f0f0f0 !important;
            transition: background-color 0.3s ease;
        }

        .form-control:focus {
            background: rgba(255, 255, 255, 0.25) !important;
            color: #fff !important;
            box-shadow: 0 0 8px #72aaff;
            outline: none !important;
            border: none !important;
        }

        .invalid-feedback {
            color: #ff6b6b !important;
            font-weight: 600;
        }

        .alert-danger {
            background-color: rgba(255, 107, 107, 0.15);
            border: 1px solid #ff6b6b;
            color: #ff6b6b;
            border-radius: 12px;
            padding: 12px 18px;
            margin-bottom: 1.25rem;
            text-align: center;
            font-weight: 600;
            font-size: 0.95rem;
            box-shadow: 0 0 10px #ff6b6b50;
        }

        button.btn-primary {
            width: 100%;
            background: linear-gradient(90deg, #667eea, #764ba2);
            border: none;
            padding: 14px 0;
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            border-radius: 12px;
            cursor: pointer;
            transition: box-shadow 0.3s ease, transform 0.2s ease;
            box-shadow: 0 5px 15px rgba(118, 75, 162, 0.6);
        }

        button.btn-primary:hover,
        button.btn-primary:focus {
            background: linear-gradient(90deg, #764ba2, #667eea);
            box-shadow: 0 8px 25px rgba(118, 75, 162, 0.9);
            transform: translateY(-2px);
            outline: none;
        }