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

  :root {
      --primary-color: #1a1a1a;
      --secondary-color: #333;
      --accent-color: #6366f1;
      --text-light: #666;
      --bg-light: #f8f9fa;
      --white: #ffffff;
      --border-color: #e5e7eb;
  }

  html {
      scroll-behavior: smooth;
  }

  body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      line-height: 1.6;
      color: var(--primary-color);
      background-color: var(--white);
  }

  /* Navbar */
  /* nav {
      position: fixed;
      top: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      z-index: 1000;
      padding: 1rem 5%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid var(--border-color);
  }

  .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary-color);
  }

  .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
  }

  .nav-links a {
      text-decoration: none;
      color: var(--text-light);
      font-weight: 500;
      transition: color 0.3s;
      font-size: 0.9rem;
  }

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

  .mobile-menu {
      display: none;
      font-size: 1.5rem;
      cursor: pointer;
  } */

  /* Navbar */
  #navbar {
      position: fixed;
      top: 0;
      width: 100%;
      background: rgba(255, 255, 255, 0.98);
      backdrop-filter: blur(10px);
      z-index: 1000;
      padding: 1rem 5%;
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid #e5e7eb;
  }

  .logo {
      font-size: 1.5rem;
      font-weight: 700;
      color: #1a1a1a;
      text-decoration: none;
      letter-spacing: 1px;
  }

  .nav-links {
      display: flex;
      gap: 2rem;
      list-style: none;
      margin: 0;
      padding: 0;
  }

  .nav-links a {
      text-decoration: none;
      color: #666;
      font-weight: 500;
      font-size: 0.9rem;
      transition: color 0.3s;
      position: relative;
  }

  .nav-links a:hover,
  .nav-links a.active {
      color: #1a1a1a;
  }

  /* Mobil Menü Butonu */
  .mobile-menu-btn {
      display: none;
      flex-direction: column;
      justify-content: space-around;
      width: 30px;
      height: 24px;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 0;
      z-index: 1001;
  }

  .hamburger-line {
      width: 30px;
      height: 3px;
      background: #1a1a1a;
      border-radius: 2px;
      transition: all 0.3s ease;
      position: relative;
      transform-origin: center;
  }

  /* Hamburger animasyonu - açıkken X olur */
  .mobile-menu-btn.active .hamburger-line:nth-child(1) {
      transform: rotate(45deg) translate(6px, 6px);
  }

  .mobile-menu-btn.active .hamburger-line:nth-child(2) {
      opacity: 0;
  }

  .mobile-menu-btn.active .hamburger-line:nth-child(3) {
      transform: rotate(-45deg) translate(6px, -6px);
  }

  /* Mobil Responsive */
  @media (max-width: 968px) {
      .mobile-menu-btn {
          display: flex;
      }

      .nav-links {
          position: fixed;
          top: 70px;
          right: -100%;
          width: 100%;
          height: calc(100vh - 70px);
          background: rgba(255, 255, 255, 0.98);
          backdrop-filter: blur(10px);
          flex-direction: column;
          align-items: center;
          justify-content: flex-start;
          padding-top: 3rem;
          gap: 0;
          transition: right 0.3s ease;
          border-top: 1px solid #e5e7eb;
      }

      .nav-links.active {
          right: 0;
      }

      .nav-links li {
          width: 100%;
          text-align: center;
      }

      .nav-links a {
          display: block;
          padding: 1.2rem;
          font-size: 1.1rem;
          border-bottom: 1px solid #f0f0f0;
      }
  }

  /* Sections */
  section {
      padding: 5rem 5%;
      max-width: 1200px;
      margin: 0 auto;
  }

  /* Hero Section */
  .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding-top: 80px;
  }

  .hero-container {
      display: grid;
      grid-template-columns: auto 1fr 1fr;
      gap: 3rem;
      align-items: center;
      width: 100%;
  }

  .social-sidebar {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
  }

  .social-sidebar a {
      width: 40px;
      height: 40px;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-light);
      text-decoration: none;
      transition: all 0.3s;
  }

  .social-sidebar a:hover {
      background: var(--primary-color);
      color: var(--white);
      transform: translateY(-3px);
  }

  .hero-content h1 {
      font-size: 3rem;
      margin-bottom: 0.5rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
  }

  .hero-content .wave {
      font-size: 2rem;
      animation: wave 2s infinite;
  }

  @keyframes wave {

      0%,
      100% {
          transform: rotate(0deg);
      }

      50% {
          transform: rotate(20deg);
      }
  }

  .hero-content .subtitle {
      color: var(--text-light);
      font-size: 1.1rem;
      margin-bottom: 1rem;
      position: relative;
      padding-left: 60px;
  }

  .hero-content .subtitle::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      width: 50px;
      height: 1px;
      background: var(--text-light);
  }

  .hero-content p {
      color: var(--text-light);
      max-width: 400px;
      margin-bottom: 2rem;
  }

  .btn {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.8rem 1.5rem;
      background: var(--primary-color);
      color: var(--white);
      text-decoration: none;
      border-radius: 8px;
      font-weight: 500;
      transition: all 0.3s;
      border: none;
      cursor: pointer;
  }

  .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
  }

  .hero-image {
      position: relative;
      justify-self: end;
  }

  .hero-image img {
      width: 350px;
      height: 350px;
      object-fit: cover;
      border-radius: 50%;
      border: 5px solid var(--white);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  }

  .scroll-indicator {
      position: absolute;
      bottom: 2rem;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: var(--text-light);
      font-size: 0.9rem;
      animation: bounce 2s infinite;
  }

  @keyframes bounce {

      0%,
      100% {
          transform: translateX(-50%) translateY(0);
      }

      50% {
          transform: translateX(-50%) translateY(-10px);
      }
  }

  /* Section Headers */
  .section-header {
      text-align: center;
      margin-bottom: 3rem;
  }

  .section-header h2 {
      font-size: 2rem;
      margin-bottom: 0.5rem;
  }

  .section-header p {
      color: var(--text-light);
      font-size: 0.9rem;
  }

  /* About Section */
  .about-content {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 3rem;
      align-items: start;
  }

  .about-image {
      position: relative;
  }

  .about-image img {
      width: 100%;
      border-radius: 20px;
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  }

  .stats-cards {
      display: flex;
      gap: 1rem;
      margin-bottom: 2rem;
  }

  .stat-card {
      flex: 1;
      padding: 1.5rem;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      text-align: center;
      transition: all 0.3s;
  }

  .stat-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  }

  .stat-card i {
      font-size: 1.5rem;
      margin-bottom: 0.5rem;
      color: var(--primary-color);
  }

  .stat-card h4 {
      font-size: 0.9rem;
      margin-bottom: 0.2rem;
  }

  .stat-card span {
      font-size: 0.8rem;
      color: var(--text-light);
  }

  .about-text {
      color: var(--text-light);
      line-height: 1.8;
      margin-bottom: 1.5rem;
  }

  /* Skills Section */
  .skills-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 2rem;
  }

  .skill-category {
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 2rem;
  }

  .skill-category h3 {
      margin-bottom: 1.5rem;
      font-size: 1.1rem;
  }

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

  .skill-item {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.9rem;
  }

  .skill-item i {
      color: var(--primary-color);
      font-size: 0.8rem;
  }

  .skill-level {
      font-size: 0.75rem;
      color: var(--text-light);
      margin-left: 1.3rem;
  }

  /* Services Section */
  .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
  }

  .service-card {
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 2rem;
      transition: all 0.3s;
      cursor: pointer;
  }

  .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  }

  .service-card i {
      font-size: 2rem;
      margin-bottom: 1rem;
      color: var(--primary-color);
  }

  .service-card h3 {
      margin-bottom: 1rem;
      font-size: 1.1rem;
  }

  .service-card p {
      color: var(--text-light);
      font-size: 0.9rem;
      margin-bottom: 1rem;
  }

  .service-link {
      color: var(--primary-color);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 500;
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
  }

  /* Career Section */
  .career-tabs {
      display: flex;
      justify-content: center;
      gap: 2rem;
      margin-bottom: 3rem;
  }

  .tab-btn {
      padding: 0.8rem 1.5rem;
      border: none;
      background: none;
      cursor: pointer;
      font-size: 1rem;
      color: var(--text-light);
      display: flex;
      align-items: center;
      gap: 0.5rem;
      transition: all 0.3s;
      border-radius: 8px;
  }

  .tab-btn.active {
      color: var(--primary-color);
      background: var(--bg-light);
  }

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

  .timeline::before {
      content: '';
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
      width: 2px;
      height: 100%;
      background: var(--border-color);
  }

  .timeline-item {
      display: flex;
      justify-content: flex-end;
      padding-right: 50%;
      position: relative;
      margin-bottom: 2rem;
  }

  .timeline-item:nth-child(even) {
      justify-content: flex-start;
      padding-right: 0;
      padding-left: 50%;
  }

  .timeline-content {
      background: var(--white);
      padding: 1.5rem;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      max-width: 350px;
      position: relative;
  }

  .timeline-item::before {
      content: '';
      position: absolute;
      right: calc(50% - 6px);
      top: 1.5rem;
      width: 12px;
      height: 12px;
      background: var(--primary-color);
      border-radius: 50%;
      border: 2px solid var(--white);
  }

  .timeline-content h4 {
      margin-bottom: 0.3rem;
  }

  .timeline-content .company {
      color: var(--text-light);
      font-size: 0.9rem;
      margin-bottom: 0.3rem;
  }

  .timeline-content .date {
      color: var(--text-light);
      font-size: 0.8rem;
  }

  /* Portfolio Section */
  .portfolio-filters {
      display: flex;
      justify-content: center;
      gap: 1rem;
      margin-bottom: 3rem;
  }

  .filter-btn {
      padding: 0.5rem 1rem;
      border: 1px solid var(--border-color);
      background: var(--white);
      border-radius: 20px;
      cursor: pointer;
      transition: all 0.3s;
      font-size: 0.9rem;
  }

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

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

  .portfolio-item {
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      transition: all 0.3s;
  }

  .portfolio-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
  }

  .portfolio-item img {
      width: 100%;
      height: 250px;
      object-fit: cover;
  }

  .portfolio-info {
      padding: 1.5rem;
  }

  .portfolio-info h3 {
      margin-bottom: 0.5rem;
  }

  .portfolio-link {
      color: var(--text-light);
      text-decoration: none;
      font-size: 0.9rem;
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
  }

  /* Testimonials */
  .testimonials-slider {
      display: flex;
      gap: 2rem;
      overflow-x: auto;
      padding: 1rem;
      scroll-snap-type: x mandatory;
  }

  .testimonial-card {
      min-width: 350px;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 2rem;
      text-align: center;
      scroll-snap-align: start;
  }

  .testimonial-card img {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      object-fit: cover;
      margin-bottom: 1rem;
  }

  .testimonial-card h4 {
      margin-bottom: 0.5rem;
  }

  .testimonial-card p {
      color: var(--text-light);
      font-size: 0.9rem;
      line-height: 1.6;
  }

  /* Contact Section */
  .contact-content {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3rem;
  }

  .contact-info {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
  }

  .contact-card {
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 1.5rem;
      text-align: center;
      transition: all 0.3s;
  }

  .contact-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  }

  .contact-card i {
      font-size: 1.5rem;
      margin-bottom: 0.5rem;
      color: var(--primary-color);
  }

  .contact-card h4 {
      margin-bottom: 0.3rem;
  }

  .contact-card p {
      color: var(--text-light);
      font-size: 0.9rem;
      margin-bottom: 0.5rem;
  }

  .contact-card a {
      color: var(--primary-color);
      text-decoration: none;
      font-size: 0.85rem;
      font-weight: 500;
  }

  .contact-form {
      display: flex;
      flex-direction: column;
      gap: 1rem;
  }

  .form-group {
      position: relative;
  }

  .form-group input,
  .form-group textarea {
      width: 100%;
      padding: 1rem;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-family: inherit;
      font-size: 0.9rem;
      transition: all 0.3s;
  }

  .form-group input:focus,
  .form-group textarea:focus {
      outline: none;
      border-color: var(--primary-color);
  }

  .form-group label {
      position: absolute;
      left: 1rem;
      top: 1rem;
      color: var(--text-light);
      font-size: 0.9rem;
      transition: all 0.3s;
      pointer-events: none;
  }

  .form-group input:focus+label,
  .form-group input:not(:placeholder-shown)+label,
  .form-group textarea:focus+label,
  .form-group textarea:not(:placeholder-shown)+label {
      top: -0.5rem;
      left: 0.8rem;
      background: var(--white);
      padding: 0 0.3rem;
      font-size: 0.8rem;
      color: var(--primary-color);
  }

  /* Footer */
  footer {
      background: var(--bg-light);
      padding: 3rem 5%;
      text-align: center;
  }

  .footer-content h3 {
      margin-bottom: 1rem;
  }

  .footer-links {
      display: flex;
      justify-content: center;
      gap: 2rem;
      margin-bottom: 1.5rem;
  }

  .footer-links a {
      color: var(--text-light);
      text-decoration: none;
      font-size: 0.9rem;
  }

  .footer-links a:hover {
      color: var(--primary-color);
  }

  .footer-social {
      display: flex;
      justify-content: center;
      gap: 1rem;
      margin-bottom: 1.5rem;
  }

  .footer-social a {
      width: 40px;
      height: 40px;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-light);
      text-decoration: none;
      transition: all 0.3s;
  }

  .footer-social a:hover {
      background: var(--primary-color);
      color: var(--white);
  }

  .copyright {
      color: var(--text-light);
      font-size: 0.85rem;
  }

  /* Back to Top */
  .back-to-top {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      width: 45px;
      height: 45px;
      background: var(--primary-color);
      color: var(--white);
      border: none;
      border-radius: 8px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s;
      z-index: 999;
  }

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

  .back-to-top:hover {
      transform: translateY(-3px);
  }

  /* Modal */
  .modal {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.5);
      z-index: 2000;
      align-items: center;
      justify-content: center;
      padding: 2rem;
  }

  .modal.active {
      display: flex;
  }

  .modal-content {
      background: var(--white);
      border-radius: 16px;
      padding: 2rem;
      max-width: 500px;
      width: 100%;
      max-height: 80vh;
      overflow-y: auto;
      position: relative;
      animation: modalIn 0.3s ease;
  }

  @keyframes modalIn {
      from {
          opacity: 0;
          transform: scale(0.9);
      }

      to {
          opacity: 1;
          transform: scale(1);
      }
  }

  .modal-close {
      position: absolute;
      top: 1rem;
      right: 1rem;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-light);
  }

  .modal-content h3 {
      margin-bottom: 1rem;
  }

  .modal-content ul {
      list-style: none;
      margin-top: 1rem;
  }

  .modal-content li {
      padding: 0.5rem 0;
      display: flex;
      align-items: flex-start;
      gap: 0.5rem;
  }

  .modal-content li i {
      color: var(--primary-color);
      margin-top: 0.2rem;
  }

  /* Carousel Modal */
  .carousel-modal .modal-content {
      max-width: 800px;
  }

  .carousel-container {
      position: relative;
      overflow: hidden;
  }

  .carousel-slide {
      display: none;
  }

  .carousel-slide.active {
      display: block;
  }

  .carousel-slide img {
      width: 100%;
      border-radius: 8px;
  }

  .carousel-nav {
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      background: rgba(255, 255, 255, 0.9);
      border: none;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      transition: all 0.3s;
  }

  .carousel-nav:hover {
      background: var(--white);
  }

  .carousel-prev {
      left: 1rem;
  }

  .carousel-next {
      right: 1rem;
  }

  .carousel-dots {
      display: flex;
      justify-content: center;
      gap: 0.5rem;
      margin-top: 1rem;
  }

  .carousel-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--border-color);
      border: none;
      cursor: pointer;
  }

  .carousel-dot.active {
      background: var(--primary-color);
  }

  /* Responsive */
  @media (max-width: 968px) {
      .hero-container {
          grid-template-columns: 1fr;
          text-align: center;
      }

      .social-sidebar {
          flex-direction: row;
          justify-content: center;
      }

      .hero-content p {
          margin: 0 auto 2rem;
      }

      .hero-image {
          justify-self: center;
          order: -1;
      }

      .hero-image img {
          width: 250px;
          height: 250px;
      }

      .about-content {
          grid-template-columns: 1fr;
      }

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

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

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

      .contact-content {
          grid-template-columns: 1fr;
      }

      .timeline::before {
          left: 20px;
      }

      .timeline-item,
      .timeline-item:nth-child(even) {
          justify-content: flex-start;
          padding-left: 50px;
          padding-right: 0;
      }

      .timeline-item::before {
          right: auto;
          left: 14px;
      }

      .nav-links {
          position: fixed;
          top: 70px;
          right: -100%;
          width: 100%;
          height: calc(100vh - 70px);
          background: rgba(255, 255, 255, 0.98);
          flex-direction: column;
          align-items: center;
          justify-content: start;
          padding-top: 2rem;
          transition: right 0.3s ease;
      }

      .nav-links.active {
          right: 0;
      }

      .mobile-menu {
          display: block;
      }
  }