:root {
            --bg-color: #000000;
            --text-main: #ffffff;
            --text-muted: #86868b;
            --accent-blue: #2997ff;
            --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
        }

        * { margin: 0; padding: 0; box-sizing: border-box; }

        body {
            background-color: var(--bg-color);
            color: var(--text-main);
            font-family: var(--font-main);
            overflow-x: hidden;
        }

        h1, h2, h3 { letter-spacing: -0.5px; }
        p { line-height: 1.6; color: var(--text-muted); }

        nav {
            position: fixed;
            top: 0; width: 100%;
            padding: 20px 50px;
            display: flex; justify-content: space-between; align-items: center;
            background: rgba(0, 0, 0, 0.8); backdrop-filter: blur(20px);
            z-index: 1000; border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .logo { font-size: 1.5rem; font-weight: 700; letter-spacing: 2px; }
        .nav-links a { margin-left: 30px; text-decoration: none; color: var(--text-muted); font-size: 0.9rem; transition: 0.3s; }
        .nav-links a:hover { color: #fff; }
        .buy-btn { background: #fff; color: #000; padding: 8px 20px; border-radius: 20px; font-weight: 600; }

        .hero {
            height: 100vh;
            display: flex; flex-direction: column;
            justify-content: center; align-items: center; text-align: center;
            background: radial-gradient(circle at center, #1a1a1a 0%, #000000 80%);
            padding: 0 20px;
        }
        .hero h1 {
            font-size: 6rem; font-weight: 700;
            background: linear-gradient(180deg, #fff, #666);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            margin-bottom: 10px;
            animation: fadeIn 1.5s ease;
        }
        .hero p { font-size: 1.8rem; max-width: 700px; margin-bottom: 40px; animation: fadeIn 2s ease; }

        .showcase { padding: 100px 10%; }
        
        .feature-row {
            display: flex; align-items: center; justify-content: space-between;
            margin-bottom: 150px; gap: 50px;
            opacity: 0; transform: translateY(50px); transition: all 1s ease;
        }
        
        .feature-row:nth-child(even) { flex-direction: row-reverse; }

        .feature-text { flex: 1; }
        .feature-text h2 { font-size: 3rem; margin-bottom: 20px; color: #fff; }
        .feature-text h3 { font-size: 1.2rem; color: var(--accent-blue); margin-bottom: 10px; text-transform: uppercase; letter-spacing: 2px;}
        .feature-text p { font-size: 1.2rem; }

        .feature-img { flex: 1.2; }
        .feature-img img {
            width: 100%; border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.6);
            border: 1px solid rgba(255,255,255,0.1);
            transition: transform 0.5s;
        }
        .feature-img img:hover { transform: scale(1.02); }

        .colors-section {
            padding: 100px 0;
            text-align: center;
            background: #080808;
        }
        
        .colors-section h2 { font-size: 3rem; margin-bottom: 40px; color: #fff; }

        .product-viewer {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
        }

        .main-image-container {
            width: 100%;
            height: 400px; 
            display: flex;
            justify-content: center;
            align-items: center;
            margin-bottom: 30px;
        }

        .main-image {
            max-width: 100%;
            max-height: 100%;
            border-radius: 15px;
            transition: opacity 0.4s ease; 
            filter: drop-shadow(0 20px 30px rgba(0,0,0,0.5));
        }

        .color-controls {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 20px;
        }

        .selected-color-name {
            font-size: 1.5rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
            min-height: 30px;
        }

        .color-balls {
            display: flex;
            gap: 25px;
            background: rgba(255,255,255,0.1);
            padding: 15px 30px;
            border-radius: 50px;
            backdrop-filter: blur(10px);
        }

        .ball {
            width: 35px;
            height: 35px;
            border-radius: 50%;
            cursor: pointer;
            border: 2px solid transparent;
            transition: all 0.3s ease;
            position: relative;
        }


        .ball.active {
            transform: scale(1.2);
            border-color: #fff;
            box-shadow: 0 0 15px rgba(255,255,255,0.3);
        }


        .specs { padding: 100px 20%; background: #000; text-align: center; }
        .specs h2 { font-size: 2.5rem; margin-bottom: 50px; }
        .spec-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 40px; }
        .spec-item h4 { font-size: 1.5rem; margin-bottom: 10px; color: #fff; }
        .spec-item span { font-size: 1rem; color: var(--text-muted); }


        footer { padding: 50px; text-align: center; border-top: 1px solid #222; font-size: 0.8rem; color: #555; }


        @media (max-width: 768px) {
            .hero h1 { font-size: 3.5rem; }
            .nav-links { display: none; }
            .feature-row { flex-direction: column !important; }
            .main-image-container { height: 250px; }
        }

        .reveal.active { opacity: 1; transform: translateY(0); }
        @keyframes fadeIn { from { opacity:0; transform:translateY(20px); } to { opacity:1; transform:translateY(0); } }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            z-index: 1001;
        }
        .hamburger span {
            width: 25px;
            height: 3px;
            background-color: #fff;
            transition: all 0.3s;
        }
        @media (max-width: 768px){
            .hamburger {
                display: flex;
            }
            .nav-links {
                    position: fixed;
                    top: 0;
                    right: -100%;
                    width: 70%;
                    height: 100vh;
                    background: rgba(0, 0, 0, 0.95);
                    backdrop-filter: blur(10px);
                    flex-direction: column;
                    justify-content: center;
                    align-items: center;
                    transition: right 0.4s ease; /* 👈 net geçiş */
                    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.5);
                    display: flex; /* 👈 çok önemli: menüyü görünür hale getirir */
  }
            .nav-links.active {
                right: 0;
            }
            .nav-links a {
                font-size: 1.5rem;
                margin: 20px 0;
                margin-left: 0;
            }
        }