* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Poppins', sans-serif;
        }

        body {
            min-height: 100vh;
            background: linear-gradient(135deg, #a0d2ff 0%, #6ab0f5 50%, #3e8ed0 100%);
            background-attachment: fixed;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            animation: bgGlow 8s ease infinite alternate;
        }

        /* Animasi background lembut */
        @keyframes bgGlow {
            0% {
                background: linear-gradient(135deg, #a0d2ff, #6ab0f5, #3e8ed0);
            }
            100% {
                background: linear-gradient(135deg, #b8e1ff, #7dbefa, #4f9fdb);
            }
        }

        /* Kartu login premium */
        .login-card {
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(2px);
            border-radius: 32px;
            box-shadow: 0 25px 45px -12px rgba(0, 0, 0, 0.3), 0 4px 12px rgba(0, 0, 0, 0.05);
            padding: 2rem 2rem 2.2rem;
            width: 100%;
            max-width: 480px;
            transition: transform 0.25s ease, box-shadow 0.3s;
            border: 1px solid rgba(255,255,255,0.4);
        }

        .login-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 32px 48px -16px rgba(0, 0, 0, 0.3);
        }

        /* Icon / ilustrasi modern */
        .login-icon {
            background: linear-gradient(145deg, #eef5ff, #dfeaff);
            width: 80px;
            height: 80px;
            margin: 0 auto 1rem;
            border-radius: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 8px 14px rgba(58, 120, 255, 0.2);
        }

        .login-icon i {
            font-size: 44px;
            color: #2c7be5;
        }

        /* Judul */
        .card-title {
            font-weight: 700;
            font-size: 1.8rem;
            color: #1a2c3e;
            letter-spacing: -0.3px;
            margin-bottom: 0.25rem;
        }

        .card-sub {
            color: #5f7f9e;
            font-size: 0.9rem;
            font-weight: 400;
            margin-bottom: 2rem;
        }

        /* Input modern */
        .form-floating > .form-control {
            border-radius: 16px;
            border: 1.5px solid #e2edf7;
            background-color: #ffffff;
            transition: all 0.2s ease;
            font-weight: 500;
            padding: 1rem 0.75rem;
            height: calc(3.5rem + 2px);
        }

        .form-floating > .form-control:focus {
            border-color: #2c7be5;
            box-shadow: 0 0 0 4px rgba(44, 123, 229, 0.2);
            outline: none;
        }

        .form-floating > label {
            font-weight: 500;
            color: #7895b2;
            padding-left: 0.9rem;
        }

        /* Grup password dengan icon show/hide */
        .password-wrapper {
            position: relative;
        }

        .toggle-password {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            cursor: pointer;
            color: #6c86a3;
            background: white;
            padding: 0 5px;
            border-radius: 30px;
            z-index: 10;
            transition: color 0.2s;
            font-size: 1.2rem;
        }

        .toggle-password:hover {
            color: #2c7be5;
        }

        /* checkbox styling */
        .form-check-input {
            border-radius: 5px;
            border: 1.5px solid #cbdbe0;
            cursor: pointer;
        }
        .form-check-input:checked {
            background-color: #2c7be5;
            border-color: #2c7be5;
        }
        .form-check-label {
            font-size: 0.85rem;
            font-weight: 500;
            color: #334e6e;
            margin-left: 5px;
        }

        /* tombol login premium */
        .btn-login {
            background: linear-gradient(95deg, #1e6fdf, #2c7be5);
            border: none;
            padding: 12px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.3px;
            transition: all 0.25s;
            box-shadow: 0 5px 12px rgba(44, 123, 229, 0.3);
            color: white;
        }

        .btn-login:hover {
            background: linear-gradient(95deg, #0f5bc2, #1f6ad4);
            transform: scale(1.01);
            box-shadow: 0 8px 18px rgba(44, 123, 229, 0.4);
        }

        .btn-login:active {
            transform: scale(0.98);
        }

        /* link lupa password */
        .forgot-link {
            color: #2c7be5;
            font-weight: 500;
            text-decoration: none;
            font-size: 0.85rem;
            transition: all 0.2s;
        }
        .forgot-link:hover {
            color: #0c58b3;
            text-decoration: underline;
        }

        /* animasi fade in */
        @keyframes fadeSlide {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .login-card {
            animation: fadeSlide 0.6s cubic-bezier(0.2, 0.9, 0.4, 1.1);
        }

        /* custom responsiveness */
        @media (max-width: 576px) {
            .login-card {
                padding: 1.5rem 1.3rem;
                max-width: 94%;
            }
            .card-title {
                font-size: 1.5rem;
            }
            .login-icon {
                width: 65px;
                height: 65px;
            }
            .login-icon i {
                font-size: 32px;
            }
        }