/* === VARIABEL WARNA === */
        :root {
            --primary: #3498db;
            --primary-light: #5dade2;
            --primary-dark: #2980b9;
            --success: #2ecc71;
            --warning: #f39c12;
            --danger: #e74c3c;
            --light-gray: #f8f9fa;
            --gray: #e9ecef;
            --dark-gray: #6c757d;
            --white: #ffffff;
        }

        /* === GAYA UMUM === */
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            min-height: 100vh;
            padding: 20px 0;
        }

        .container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 25px;
            background: var(--white);
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(50, 50, 93, 0.1), 0 5px 15px rgba(0, 0, 0, 0.07);
        }

        header {
            text-align: center;
            margin-bottom: 40px;
            padding-bottom: 20px;
            border-bottom: 2px solid var(--gray);
        }

        header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
            background: linear-gradient(to right, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .subtitle {
            color: var(--dark-gray);
            font-size: 1.1rem;
            margin-top: 10px;
        }

        /* === TOMBOL KEMBALI === */
        .back-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 24px;
            background: linear-gradient(to right, var(--primary), var(--primary-light));
            color: var(--white);
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
            margin-bottom: 25px;
            box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
            border: none;
        }

        .back-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4);
            color: var(--white);
        }

        /* === CARD DOWNLOAD === */
        .download-card {
            background: var(--white);
            border-radius: 15px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            border: 1px solid var(--gray);
            transition: all 0.3s ease;
        }

        .download-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }

        .download-card .os-icon {
            font-size: 4rem;
            margin-bottom: 20px;
            display: block;
        }

        .download-card.android .os-icon {
            color: var(--success);
        }

        .download-card.ios .os-icon {
            color: var(--primary);
        }

        .download-card h3 {
            color: var(--dark-gray);
            margin-bottom: 15px;
            font-weight: 700;
        }

        .download-card .features {
            list-style: none;
            padding: 0;
            margin: 20px 0;
        }

        .download-card .features li {
            padding: 8px 0;
            color: var(--dark-gray);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .download-card .features li i {
            color: var(--primary);
        }

        .download-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 15px 30px;
            background: linear-gradient(to right, var(--primary), var(--primary-light));
            color: var(--white);
            text-decoration: none;
            border-radius: 10px;
            font-weight: 600;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            border: none;
            width: 100%;
            margin-top: 20px;
        }

        .download-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(52, 152, 219, 0.3);
            color: var(--white);
        }

        .download-btn.disabled {
            background: var(--dark-gray);
            opacity: 0.7;
            cursor: not-allowed;
        }

        .download-btn.disabled:hover {
            transform: none;
            box-shadow: none;
        }

        /* === STATUS APLIKASI === */
        .app-status {
            margin-top: 40px;
            padding: 20px;
            background: var(--light-gray);
            border-radius: 15px;
            border: 1px solid var(--gray);
        }

        .status-item {
            display: flex;
            align-items: center;
            gap: 15px;
            padding: 15px;
            background: var(--white);
            border-radius: 10px;
            margin-bottom: 10px;
            border-left: 5px solid var(--success);
        }

        .status-item.ios {
            border-left-color: var(--warning);
        }

        .status-icon {
            font-size: 1.5rem;
        }

        .status-text {
            flex: 1;
        }

        .status-text strong {
            color: var(--dark-gray);
        }

        .status-badge {
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
        }

        .badge-success {
            background: rgba(46, 204, 113, 0.15);
            color: var(--success);
        }

        .badge-warning {
            background: rgba(243, 156, 18, 0.15);
            color: var(--warning);
        }

        /* === DEVELOPER INFO === */
        .developer-info {
            margin-top: 40px;
            padding: 25px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            border-radius: 15px;
            color: white;
            text-align: center;
        }

        .developer-info h4 {
            margin-bottom: 15px;
            font-weight: 700;
        }

        .developer-info p {
            margin-bottom: 0;
            opacity: 0.9;
        }

        /* === MODAL NOTIFICATION === */
        .modal-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 9999;
        }

        .modal-overlay.active {
            display: flex;
        }

        .modal-content {
            background: var(--white);
            border-radius: 15px;
            padding: 30px;
            max-width: 500px;
            width: 90%;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            animation: modalSlideIn 0.3s ease;
        }

        @keyframes modalSlideIn {
            from {
                opacity: 0;
                transform: translateY(-50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .modal-header {
            text-align: center;
            margin-bottom: 20px;
        }

        .modal-icon {
            font-size: 4rem;
            color: var(--warning);
            margin-bottom: 15px;
        }

        .modal-title {
            color: var(--danger);
            font-weight: 700;
            font-size: 1.5rem;
        }

        .modal-body {
            text-align: center;
            color: var(--dark-gray);
            line-height: 1.6;
            margin-bottom: 25px;
        }

        .modal-footer {
            text-align: center;
        }

        .modal-btn {
            padding: 10px 30px;
            background: linear-gradient(to right, var(--primary), var(--primary-light));
            color: white;
            border: none;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }

        .modal-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
        }

        /* === RESPONSIVE === */
        @media (max-width: 768px) {
            .container {
                padding: 15px;
                margin: 10px;
            }
            
            header h1 {
                font-size: 2rem;
                flex-direction: column;
                gap: 10px;
            }
            
            .download-card {
                padding: 20px;
            }
            
            .os-icon {
                font-size: 3rem;
            }
        }

        /* === SCROLLBAR CUSTOM === */
        ::-webkit-scrollbar {
            width: 8px;
        }

        ::-webkit-scrollbar-track {
            background: var(--light-gray);
            border-radius: 10px;
        }

        ::-webkit-scrollbar-thumb {
            background: linear-gradient(to bottom, var(--primary-light), var(--primary));
            border-radius: 10px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: linear-gradient(to bottom, var(--primary), var(--primary-dark));
        }