/* VARIABEL CSS UNTUK KONSISTENSI */
        :root {
            --primary-color: #2c3e50;
            --secondary-color: #3498db;
            --accent-color: #e74c3c;
            --light-color: #f8f9fa;
            --dark-color: #2c3e50;
            --text-color: #333;
            --text-light: #7f8c8d;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 2rem;
            --spacing-xl: 4rem;
            --border-radius: 8px;
            --border-radius-lg: 16px;
            --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --box-shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s ease;
            --transition-slow: all 0.6s ease;
        }

        /* RESET DAN GAYA DASAR */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: var(--light-color);
            overflow-x: hidden;
        }

        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }

        section {
            padding: var(--spacing-xl) 0;
        }

        h1, h2, h3, h4 {
            margin-bottom: var(--spacing-md);
            color: var(--primary-color);
            font-weight: 600;
        }

        h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
        }

        h2 {
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            text-align: center;
            margin-bottom: var(--spacing-xl);
            position: relative;
        }

        h2:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--secondary-color);
            border-radius: 2px;
        }

        p {
            margin-bottom: var(--spacing-md);
            color: var(--text-light);
            font-weight: 400;
        }

        a {
            text-decoration: none;
            color: var(--secondary-color);
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent-color);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: var(--spacing-sm) var(--spacing-lg);
            background-color: var(--secondary-color);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: var(--transition);
            font-weight: 500;
            font-size: 1rem;
            gap: 8px;
        }

        .btn:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--box-shadow-lg);
        }

        .btn-accent {
            background-color: var(--accent-color);
        }

        .btn-accent:hover {
            background-color: #c0392b;
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--secondary-color);
            color: var(--secondary-color);
        }

        .btn-outline:hover {
            background-color: var(--secondary-color);
            color: white;
        }

        /* HEADER DAN NAVIGASI */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: var(--box-shadow);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-md) 0;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .logo i {
            color: var(--secondary-color);
        }

        .nav-tabs {
            display: flex;
            list-style: none;
        }

        .nav-tabs li {
            margin-left: var(--spacing-lg);
        }

        .nav-tabs a {
            color: var(--primary-color);
            font-weight: 500;
            position: relative;
            padding: 8px 0;
            display: block;
        }

        .nav-tabs a:after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--secondary-color);
            transition: var(--transition);
        }

        .nav-tabs a:hover:after,
        .nav-tabs a.active:after {
            width: 100%;
        }

        .nav-tabs a.active {
            color: var(--secondary-color);
        }

        .menu-toggle {
            display: none;
            cursor: pointer;
            font-size: 1.5rem;
            color: var(--primary-color);
        }

        /* SISTEM TAB BARU */
        .tab-content {
            display: none;
            animation: fadeIn 0.5s ease;
            margin-top: 80px;
        }

        .tab-content.active {
            display: block;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        /* HERO SECTION */
        .hero {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            min-height: 100vh;
            display: flex;
            align-items: center;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMTAwJSIgaGVpZ2h0PSIxMDAlIiB2aWV3Qm94PSIwIDAgMTIwMCA4MDAiIHByZXNlcnZlQXNwZWN0UmF0aW89Im5vbmUiPjxnIGZpbGw9IiNmZmZmZmYwMyI+PHBhdGggZD0iTTAgNDAwTDEyMDAgMEwxMjAwIDgwMEwwIDQwMFoiLz48L2c+PC9zdmc+');
            background-size: cover;
            opacity: 0.1;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .hero h1 {
            color: white;
            margin-bottom: var(--spacing-md);
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.8s ease forwards;
        }

        .hero .subtitle {
            font-size: 1.5rem;
            margin-bottom: var(--spacing-md);
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.8s ease 0.2s forwards;
        }

        .hero p {
            color: rgba(255, 255, 255, 0.9);
            margin: 0 auto var(--spacing-lg);
            max-width: 600px;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.8s ease 0.4s forwards;
        }

        .hero-buttons {
            display: flex;
            gap: var(--spacing-md);
            justify-content: center;
            flex-wrap: wrap;
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.8s ease 0.6s forwards;
        }

        .profile-img {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            object-fit: cover;
            border: 5px solid white;
            margin: 0 auto var(--spacing-lg);
            box-shadow: var(--box-shadow-lg);
            opacity: 0;
            transform: scale(0.8);
            animation: zoomIn 0.8s ease 0.8s forwards;
        }

        /* TENTANG SAYA */
        .about {
            background-color: white;
        }

        .about-content {
            display: flex;
            align-items: center;
            gap: var(--spacing-xl);
        }

        .about-text {
            flex: 1;
        }

        .stats {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing-md);
            margin: var(--spacing-lg) 0;
        }

        .stat-item {
            text-align: center;
            padding: var(--spacing-md);
            background-color: var(--light-color);
            border-radius: var(--border-radius);
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--secondary-color);
            display: block;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-light);
        }

        .about-img {
            flex: 1;
            border-radius: var(--border-radius-lg);
            overflow: hidden;
            box-shadow: var(--box-shadow-lg);
            transform: translateX(20px);
            opacity: 0;
            transition: all 0.8s ease;
        }

        .about-img.animate {
            transform: translateX(0);
            opacity: 1;
        }

        /* KE AHLIAN */
        .skills {
            background-color: var(--light-color);
        }

        .skills-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: var(--spacing-lg);
        }

        .skill-card {
            background-color: white;
            padding: var(--spacing-lg);
            border-radius: var(--border-radius-lg);
            box-shadow: var(--box-shadow);
            text-align: center;
            transition: var(--transition);
            transform: translateY(20px);
            opacity: 0;
            border-top: 4px solid var(--secondary-color);
        }

        .skill-card.animate {
            transform: translateY(0);
            opacity: 1;
        }

        .skill-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--box-shadow-lg);
        }

        .skill-icon {
            font-size: 2.5rem;
            color: var(--secondary-color);
            margin-bottom: var(--spacing-md);
        }

        .skill-bar {
            height: 6px;
            background-color: #e0e0e0;
            border-radius: 3px;
            margin: var(--spacing-md) 0;
            overflow: hidden;
        }

        .skill-progress {
            height: 100%;
            background-color: var(--secondary-color);
            border-radius: 3px;
            width: 0;
            transition: width 1.5s ease;
        }

        /* PORTOFOLIO */
        .portfolio {
            background-color: white;
        }

        .portfolio-filters {
            display: flex;
            justify-content: center;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-xl);
            flex-wrap: wrap;
        }

        .filter-btn {
            padding: var(--spacing-sm) var(--spacing-md);
            background-color: var(--light-color);
            border: none;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: var(--transition);
            font-weight: 500;
        }

        .filter-btn.active,
        .filter-btn:hover {
            background-color: var(--secondary-color);
            color: white;
        }

        .portfolio-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: var(--spacing-lg);
        }

        .portfolio-item {
            border-radius: var(--border-radius-lg);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            transform: scale(0.9);
            opacity: 0;
            background-color: white;
        }

        .portfolio-item.animate {
            transform: scale(1);
            opacity: 1;
        }

        .portfolio-item:hover {
            transform: translateY(-10px) scale(1.02);
            box-shadow: var(--box-shadow-lg);
        }

        .portfolio-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            transition: var(--transition);
        }

        .portfolio-item:hover .portfolio-img {
            transform: scale(1.1);
        }

        .portfolio-info {
            padding: var(--spacing-md);
        }

        .portfolio-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: var(--spacing-sm) 0;
        }

        .portfolio-tag {
            background-color: var(--light-color);
            color: var(--text-light);
            padding: 4px 8px;
            border-radius: 4px;
            font-size: 0.8rem;
        }

        /* KONTAK */
        .contact {
            background-color: var(--light-color);
        }

        .contact-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .contact-form {
            transform: translateX(20px);
            opacity: 0;
            transition: all 0.8s ease;
        }

        .contact-form.animate {
            transform: translateX(0);
            opacity: 1;
        }

        .form-group {
            margin-bottom: var(--spacing-md);
        }

        .form-control {
            width: 100%;
            padding: var(--spacing-md);
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-family: inherit;
            transition: var(--transition);
            font-size: 1rem;
        }

        .form-control:focus {
            border-color: var(--secondary-color);
            box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
            outline: none;
        }

        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }

        .contact-item {
            display: flex;
            align-items: center;
            padding: var(--spacing-md);
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transform: translateX(-20px);
            opacity: 0;
            transition: all 0.8s ease;
        }

        .contact-item.animate {
            transform: translateX(0);
            opacity: 1;
        }

        .contact-item:hover {
            transform: translateX(5px);
            box-shadow: var(--box-shadow-lg);
        }

        .contact-icon {
            width: 50px;
            height: 50px;
            background-color: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: var(--spacing-md);
            font-size: 1.2rem;
        }

        /* FOOTER */
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            text-align: center;
        }

        .social-links {
            display: flex;
            justify-content: center;
            margin-bottom: var(--spacing-lg);
            gap: var(--spacing-md);
        }

        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
            border-radius: 50%;
            transition: var(--transition);
            transform: translateY(0);
        }

        .social-links a:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
            flex-wrap: wrap;
        }

        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
        }

        .footer-links a:hover {
            color: white;
        }

        .copyright {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }

        /* ANIMASI KEYFRAMES */
        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes zoomIn {
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        /* BACK TO TOP BUTTON */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--secondary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            opacity: 0;
            visibility: hidden;
            z-index: 999;
            box-shadow: var(--box-shadow);
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .back-to-top:hover {
            background-color: var(--primary-color);
            transform: translateY(-5px);
        }

        /* LOADING INDICATOR */
        .loading {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: var(--light-color);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 9999;
            transition: opacity 0.5s ease, visibility 0.5s ease;
        }

        .loading.hidden {
            opacity: 0;
            visibility: hidden;
        }

        .spinner {
            width: 50px;
            height: 50px;
            border: 5px solid rgba(52, 152, 219, 0.2);
            border-radius: 50%;
            border-top-color: var(--secondary-color);
            animation: spin 1s linear infinite;
        }

        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }

        /* MEDIA QUERIES UNTUK RESPONSIVITAS */
        @media (max-width: 992px) {
            .contact-content {
                grid-template-columns: 1fr;
                gap: var(--spacing-lg);
            }
            
            .about-content {
                flex-direction: column;
            }
            
            .about-img {
                order: -1;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }

            .nav-tabs {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: white;
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: var(--spacing-xl);
                transition: var(--transition);
                box-shadow: var(--box-shadow);
            }

            .nav-tabs.active {
                left: 0;
            }

            .nav-tabs li {
                margin: var(--spacing-md) 0;
            }

            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }

            .stats {
                grid-template-columns: 1fr;
            }

            .portfolio-filters {
                gap: var(--spacing-sm);
            }

            .tab-content {
                margin-top: 70px;
            }
            
            .back-to-top {
                bottom: 20px;
                right: 20px;
            }
        }

        @media (max-width: 480px) {
            .container {
                width: 95%;
            }
            
            .portfolio-grid {
                grid-template-columns: 1fr;
            }
            
            .hero .subtitle {
                font-size: 1.2rem;
            }
            
            .skill-card, .contact-item {
                padding: var(--spacing-md);
            }
        }