:root {
            /* Arka planlar */
            --bg-primary: #0a0e1a;
            --bg-secondary: #0f1628;
            --bg-card: #141d35;
            --bg-card-hover: #1a2540;
            
            /* Aksan */
            --accent: #00d4ff;
            --accent-dim: #00a8cc;
            --accent-glow: rgba(0, 212, 255, 0.15);
            
            /* Tipografi */
            --text-primary: #ffffff;
            --text-secondary: #8892a4;
            --text-muted: #4a5568;
            
            /* Border */
            --border: rgba(255, 255, 255, 0.08);
            --border-accent: rgba(0, 212, 255, 0.3);
            
            /* Badge renkleri */
            --badge-amber: rgba(245, 158, 11, 0.15);
            --badge-amber-text: #f59e0b;
            --badge-blue: rgba(59, 130, 246, 0.15);
            --badge-blue-text: #60a5fa;
            --badge-gray: rgba(107, 114, 128, 0.15);
            --badge-gray-text: #9ca3af;
            
            /* Spacing */
            --radius: 12px;
            --radius-sm: 8px;
            --section-padding: 100px 0;
            --container-max: 1200px;
        }

        /* Temel Reset ve Ayarlar */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'DM Sans', sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            opacity: 0;
            animation: fadeInBody 0.5s forwards;
        }

        @keyframes fadeInBody {
            to { opacity: 1; }
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: 'Syne', sans-serif;
            font-weight: 700;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        ul {
            list-style: none;
        }

        /* Container */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Custom Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-primary);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--accent);
        }
        
        /* Selection */
        ::selection {
            background: var(--accent);
            color: var(--bg-primary);
        }

        /* Utility Sınıfları */
        .section {
            padding: var(--section-padding);
        }
        
        .section-title {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            text-align: center;
        }
        
        .section-subtitle {
            color: var(--text-secondary);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 4rem auto;
            font-size: 1.1rem;
        }

        .accent-text {
            color: var(--accent);
        }

        /* Animasyon Sınıfları */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s ease-out;
            will-change: transform, opacity;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .stagger-1 { transition-delay: 0.1s; }
        .stagger-2 { transition-delay: 0.2s; }
        .stagger-3 { transition-delay: 0.3s; }
        .stagger-4 { transition-delay: 0.4s; }

        /* Butonlar */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-family: 'Syne', sans-serif;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 1rem;
            border: none;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--bg-primary);
            box-shadow: 0 4px 15px var(--accent-glow);
        }

        .btn-primary:hover {
            background: var(--accent-dim);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border);
        }

        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: var(--accent-glow);
            transform: translateY(-2px);
        }

        /* 1. NAVBAR */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            padding: 20px 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }

        .navbar.scrolled {
            padding: 15px 0;
            backdrop-filter: blur(20px);
            background: rgba(10, 14, 26, 0.85);
            border-bottom: 1px solid var(--border);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-family: 'Syne', sans-serif;
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .main-logo-svg {
            height: 160px;
            width: auto;
            display: block;
        }

        /* Mobil boyutlar için */
        @media (max-width: 768px) {
            .main-logo-svg {
                height: 120px;
            }
        }

        .nav-links {
            display: flex;
            gap: 2rem;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color 0.3s ease;
            position: relative;
        }

        .nav-links a:hover, .nav-links a.active {
            color: var(--text-primary);
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -5px;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.3s ease;
        }

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

        .hamburger {
            display: none;
            cursor: pointer;
            background: none;
            border: none;
            color: var(--text-primary);
        }
        .hamburger svg { width: 24px; height: 24px; }

        /* Mobil Menü */
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: var(--bg-primary);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2rem;
            transform: translateY(-100%);
            transition: transform 0.4s ease-in-out;
        }

        .mobile-menu.open {
            transform: translateY(0);
        }

        .mobile-menu a {
            font-family: 'Syne', sans-serif;
            font-size: 2rem;
            font-weight: 700;
            transition: color 0.3s ease;
        }
        .mobile-menu a:hover { color: var(--accent); }
        .mobile-close {
            position: absolute;
            top: 25px;
            right: 25px;
            background: none;
            border: none;
            color: var(--text-primary);
            cursor: pointer;
        }

        /* 2. HERO */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: linear-gradient(-45deg, #0a0e1a, #0f1628, #0d1f3c, #061218);
            background-size: 400% 400%;
            animation: gradientShift 10s ease infinite;
            overflow: hidden;
            padding-top: 80px;
        }

        @keyframes gradientShift {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        /* Hero Mesh overlay */
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
            background-size: 50px 50px;
            opacity: 0.5;
            z-index: 1;
        }

        .hero-container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 4rem;
            line-height: 1.1;
            margin-bottom: 1.5rem;
            letter-spacing: -1px;
            animation: fadeInUp 0.8s ease backwards 0.1s;
        }

        .hero-content p {
            font-size: 1.25rem;
            color: var(--text-secondary);
            margin-bottom: 2.5rem;
            max-width: 90%;
            animation: fadeInUp 0.8s ease backwards 0.25s;
        }

        .hero-btns {
            display: flex;
            gap: 1rem;
            animation: fadeInUp 0.8s ease backwards 0.4s;
        }

        .hero-visual {
            position: relative;
            height: 400px;
            animation: fadeInUp 0.8s ease backwards 0.5s;
        }

        /* Floating decoration elements */
        .floating-element {
            position: absolute;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px;
            backdrop-filter: blur(10px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            animation: float 6s ease-in-out infinite;
        }

        .code-snippet {
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 320px;
            font-family: monospace;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .code-snippet span.keyword { color: #f59e0b; }
        .code-snippet span.func { color: var(--accent); }
        .code-snippet span.string { color: #34d399; }
        
        .circle-decor {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            border: 2px solid var(--border-accent);
            top: 10%;
            right: 10%;
            animation: float 8s ease-in-out infinite reverse;
        }

        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(40px); }
            to { opacity: 1; transform: translateY(0); }
        }

        @keyframes float {
            0% { transform: translate(-50%, -50%) translateY(0); }
            50% { transform: translate(-50%, -50%) translateY(-20px); }
            100% { transform: translate(-50%, -50%) translateY(0); }
        }

        /* 3. HAKKIMIZDA */
        .about-section {
            background-color: var(--bg-primary);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .about-text p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
            gap: 1.5rem;
        }

        .stat-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: transform 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            border-color: var(--border-accent);
        }

        .stat-number {
            font-family: 'Syne', sans-serif;
            font-size: 3rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 0.5rem;
        }

        .stat-label {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
        }

        /* 4. HİZMETLER */
        .services-section {
            background-color: var(--bg-secondary);
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2.5rem;
            transition: all 0.3s ease;
            position: relative;
        }

        .service-card:hover {
            transform: translateY(-6px);
            border-color: transparent;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
            /* Left border accent */
            box-shadow: inset 4px 0 0 0 var(--accent);
            background: var(--bg-card-hover);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            background: rgba(0, 212, 255, 0.1);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: var(--accent);
        }

        .service-icon svg {
            width: 30px;
            height: 30px;
        }

        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        .service-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* Hizmet kartı accent çizgisi */
        .service-accent {
            position: absolute;
            left: 0;
            top: 0;
            width: 3px;
            height: 0;
            border-radius: 0 2px 2px 0;
            transition: height 0.4s ease;
        }

        .service-card:hover .service-accent {
            height: 100%;
        }

        /* Teknoloji etiketleri */
        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 1.5rem;
        }

        .service-tag {
            font-size: 0.78rem;
            font-weight: 500;
            padding: 4px 10px;
            border-radius: 999px;
            border: 1px solid;
            background: transparent;
            font-family: 'DM Sans', sans-serif;
        }

        /* Mobil: tek sütun, 5. kart da normal */
        @media (max-width: 768px) {
            .service-card-wide {
                grid-column: 1 / -1;
            }
        }

        /* 5. PROJELER */
        .projects-section {
            background-color: var(--bg-primary);
        }

        .filter-container {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-bottom: 3rem;
            flex-wrap: wrap;
        }

        .filter-btn {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            padding: 8px 20px;
            border-radius: 999px;
            cursor: pointer;
            font-family: inherit;
            font-size: 0.9rem;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        .filter-btn:hover, .filter-btn.active {
            background: var(--accent);
            color: var(--bg-primary);
            border-color: var(--accent);
        }

        .projects-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .project-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 2rem;
            display: flex;
            flex-direction: column;
            transition: all 0.4s ease;
        }

        .project-card:hover {
            border-color: var(--border-accent);
            transform: translateY(-5px);
        }

        .project-card.hidden {
            display: none;
        }

        .project-head {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 1.5rem;
        }

        .project-title {
            font-size: 1.3rem;
            margin-bottom: 0.5rem;
        }

        .project-desc {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
            flex-grow: 1;
        }

        .project-tech {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
            display: flex;
            flex-wrap: wrap;
            gap: 5px;
        }
        
        .tech-tag {
            background: rgba(255,255,255,0.05);
            padding: 4px 8px;
            border-radius: 4px;
            border: 1px solid var(--border);
        }

        .status-badge {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .badge-amber { background: var(--badge-amber); color: var(--badge-amber-text); }
        .badge-blue { background: var(--badge-blue); color: var(--badge-blue-text); }
        .badge-gray { background: var(--badge-gray); color: var(--badge-gray-text); }

        /* 6. TEKNOLOJİLER */
        .tech-section {
            background-color: var(--bg-secondary);
            overflow: hidden;
        }

        .marquee-wrapper {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            position: relative;
        }

        .marquee-wrapper::before, .marquee-wrapper::after {
            content: '';
            position: absolute;
            top: 0;
            width: 150px;
            height: 100%;
            z-index: 2;
        }
        .marquee-wrapper::before {
            left: 0;
            background: linear-gradient(to right, var(--bg-secondary) 0%, transparent 100%);
        }
        .marquee-wrapper::after {
            right: 0;
            background: linear-gradient(to left, var(--bg-secondary) 0%, transparent 100%);
        }

        .marquee-track {
            display: flex;
            width: max-content;
            animation: marquee 30s linear infinite;
        }
        
        .marquee-track-reverse {
            display: flex;
            width: max-content;
            animation: marqueeReverse 30s linear infinite;
        }

        @keyframes marquee {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }
        
        @keyframes marqueeReverse {
            0% { transform: translateX(-50%); }
            100% { transform: translateX(0); }
        }

        .tech-item {
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 10px 24px;
            margin: 0 10px;
            font-weight: 500;
            background: var(--bg-card);
            white-space: nowrap;
            color: var(--text-secondary);
            transition: all 0.3s;
        }
        
        .tech-item:hover {
            color: var(--accent);
            border-color: var(--border-accent);
        }

        /* 7. İLETİŞİM */
        .contact-section {
            background-color: var(--bg-primary);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 3fr 2fr;
            gap: 4rem;
        }

        .contact-form {
            background: var(--bg-secondary);
            padding: 3rem;
            border-radius: var(--radius);
            border: 1px solid var(--border);
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        .form-label {
            display: block;
            margin-bottom: 0.5rem;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .form-control {
            width: 100%;
            padding: 14px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-family: inherit;
            font-size: 1rem;
            transition: border-color 0.3s;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--accent);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        .contact-info {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .contact-info p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
            font-size: 1.1rem;
        }

        .info-item {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 1.5rem;
        }

        .info-icon {
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.05);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
        }
        .info-icon svg { width: 20px; height: 20px; }

        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }

        .social-links a {
            width: 40px;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
            color: var(--text-secondary);
        }

        .social-links a:hover {
            background: var(--accent);
            color: var(--bg-primary);
            border-color: var(--accent);
        }

        /* 8. FOOTER */
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            padding: 3rem 0 1.5rem 0;
        }
        
        .footer-top {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid var(--border);
        }

        .footer-links {
            display: flex;
            gap: 2rem;
        }
        
        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .footer-links a:hover { color: var(--accent); }

        .footer-bottom {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* Back to Top */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 45px;
            height: 45px;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 50%;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            z-index: 99;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--accent);
            color: var(--bg-primary);
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .hero-content h1 { font-size: 3rem; }
            .projects-grid { grid-template-columns: repeat(2, 1fr); }
            .contact-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .hamburger { display: block; }
            
            .hero-container { grid-template-columns: 1fr; text-align: center; }
            .hero-content p { margin: 0 auto 2rem auto; }
            .hero-btns { justify-content: center; }
            .hero-visual { display: none; }
            
            .about-grid { grid-template-columns: 1fr; }
            .services-grid { grid-template-columns: 1fr; }
            .projects-grid { grid-template-columns: 1fr; }
            
            .footer-top { flex-direction: column; gap: 1.5rem; text-align: center; }
        }
        
        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
            html { scroll-behavior: auto; }
        }