:root {
            --bg: #0f172a;
            --card: #111827;
            --text: #e5e7eb;
            --muted: #9ca3af;
            --accent: #38bdf8;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto;
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
        }

        header {
            padding: 80px 20px;
            text-align: center;
        }

        header h1 {
            font-size: 3rem;
        }

        header span {
            color: var(--accent);
        }

        header p {
            margin-top: 15px;
            color: var(--muted);
        }

        nav {
            position: sticky;
            top: 0;
            background: rgba(15, 23, 42, 0.9);
            backdrop-filter: blur(10px);
            padding: 15px;
            display: flex;
            justify-content: center;
            gap: 30px;
            z-index: 100;
        }

        nav a {
            color: var(--muted);
            text-decoration: none;
            font-weight: 500;
        }

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

        section {
            max-width: 1000px;
            margin: auto;
            padding: 80px 20px;
        }

        h2 {
            font-size: 2rem;
            margin-bottom: 30px;
        }

        .card {
            background: var(--card);
            padding: 25px;
            border-radius: 12px;
            margin-bottom: 20px;
        }

        .skills {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 15px;
        }

        .skill {
            background: #020617;
            padding: 15px;
            text-align: center;
            border-radius: 10px;
            border: 1px solid #1f2933;
        }

        .projects {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .project {
            background: #020617;
            padding: 20px;
            border-radius: 12px;
            border: 1px solid #1f2933;
        }

        .project h3 {
            color: var(--accent);
            margin-bottom: 10px;
        }

        footer {
            text-align: center;
            padding: 40px 20px;
            color: var(--muted);
        }

        button {
            background: var(--accent);
            color: #020617;
            border: none;
            padding: 12px 20px;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
        }

        button:hover {
            opacity: 0.85;
        }

        @media (max-width: 600px) {
            header h1 {
                font-size: 2.2rem;
            }
        }

        .social-links {
            margin-bottom: 10px;
        }

        .social-links a {
            color: #333;
            font-size: 24px;
            margin: 0 10px;
            transition: color 0.3s ease;
        }

        .social-links a:hover {
            color: #0077b5;
            /* LinkedIn mavi */
        }