/* Reset en basisstijlen */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --primary-bg: #0f0f0f;
      --secondary-bg: #1a1a1a;
      --accent: #00ffc8;
      --accent-dark: #00d6a8;
      --accent-rgb: 0, 255, 200;
      --text: #f0f0f0;
      --text-secondary: #a0a0a0;
      --card-bg: #1a1a1a;
      --header-height: 80px;
      --mobile-header-height: 70px;
    }

    .logo-image {
      height: 40px;
      width: auto;
      vertical-align: middle;
    }

    @media (max-width: 768px) {
      .logo-image {
        height: 32px;
      }
    }

    body {
      font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
      background: var(--primary-bg);
      color: var(--text);
      overflow-x: auto;
      min-height: 100vh;
      line-height: 1.6;
    }

    /* Achtergrond animatie */
    .background-animation {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      z-index: -1;
      overflow: hidden;
    }

    .animation-circle {
      position: absolute;
      border-radius: 50%;
      background: rgba(var(--accent-rgb), 0.05);
      animation: float 15s infinite linear;
    }

    .animation-circle:nth-child(1) {
      width: 300px;
      height: 300px;
      top: -150px;
      left: -150px;
      animation-delay: 0s;
    }

    .animation-circle:nth-child(2) {
      width: 200px;
      height: 200px;
      top: 20%;
      right: -100px;
      animation-delay: -5s;
    }

    .animation-circle:nth-child(3) {
      width: 250px;
      height: 250px;
      bottom: -125px;
      left: 30%;
      animation-delay: -10s;
    }

    .animation-circle:nth-child(4) {
      width: 180px;
      height: 180px;
      bottom: 30%;
      right: 20%;
      animation-delay: -7s;
    }

    @keyframes float {
      0% {
        transform: translateY(0) rotate(0deg);
        opacity: 0.5;
      }
      50% {
        transform: translateY(-20px) rotate(180deg);
        opacity: 0.7;
      }
      100% {
        transform: translateY(0) rotate(360deg);
        opacity: 0.5;
      }
    }

    /* Header stijlen */
    header {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: var(--header-height);
      padding: 0 1rem;
      display: flex;
      justify-content: center;
      background: rgba(15, 15, 15, 0.95);
      backdrop-filter: blur(10px);
      z-index: 100;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .header-container {
      width: 100%;
      max-width: 1200px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      font-size: 1.8rem;
      font-weight: 800;
      letter-spacing: 1px;
      display: inline-block;
    }

    .logo span {
      background: linear-gradient(45deg, var(--accent), #00b3ff);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    nav ul {
      list-style: none;
      display: flex;
      gap: 1.5rem;
    }

    nav a {
      text-decoration: none;
      color: var(--text);
      font-weight: 500;
      transition: all 0.3s ease;
      position: relative;
      padding: 0.5rem 0;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    nav a span {
      position: relative;
    }

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

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

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

    .mobile-menu-btn {
      display: none;
      font-size: 1.5rem;
      color: var(--text);
      cursor: pointer;
      z-index: 101;
    }

    /* Hoofdinhoud */
    main {
      display: flex;
      flex-direction: row;
      width: 400vw;
      margin-top: var(--header-height);
      transition: transform 0.5s ease;
    }

    .panel {
      width: 100vw;
      padding: 2rem 1rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
      position: relative;
      overflow: hidden;
      min-height: calc(100vh - var(--header-height));
    }

    .content-wrapper {
      max-width: 1200px;
      width: 100%;
      margin: 0 auto;
      padding: 1rem;
    }

    .panel::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 20% 30%, rgba(0, 255, 200, 0.05) 0%, transparent 60%);
      z-index: -1;
    }

    .panel h2 {
      font-size: 2.5rem;
      margin-bottom: 1.5rem;
      position: relative;
      display: inline-block;
    }

    .accent-text {
      background: linear-gradient(45deg, var(--accent), #00b3ff);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .section-description {
      font-size: 1.1rem;
      color: var(--text-secondary);
      margin-bottom: 2rem;
      max-width: 600px;
    }

    /* Over Mij sectie */
    .profile-section {
      display: flex;
      flex-direction: column;
      gap: 2rem;
      margin-bottom: 2rem;
    }

    .profile-text {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }

    .intro-text {
      font-size: 1.1rem;
      line-height: 1.6;
      color: var(--text);
    }

    .profile-visual {
      display: flex;
      align-items: center;
      justify-content: center;
      order: -1;
    }

    .visual-element {
      width: 150px;
      height: 150px;
      border-radius: 50%;
      background: linear-gradient(145deg, rgba(0, 255, 200, 0.1), rgba(0, 179, 255, 0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 3rem;
      color: var(--accent);
      border: 4px solid rgba(0, 255, 200, 0.2);
      box-shadow: 0 0 30px rgba(0, 255, 200, 0.1);
    }

    .stats-container {
      display: flex;
      justify-content: space-around;
      gap: 1rem;
      margin-top: 1rem;
    }

    .stat {
      display: flex;
      flex-direction: column;
      align-items: center;
    }

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

    .stat-label {
      font-size: 0.8rem;
      color: var(--text-secondary);
      text-align: center;
    }

    .skill-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.8rem;
    }

    .skill-tag {
      background: rgba(0, 255, 200, 0.1);
      color: var(--accent);
      padding: 0.6rem 1rem;
      border-radius: 50px;
      font-size: 0.8rem;
      border: 1px solid rgba(0, 255, 200, 0.2);
      transition: all 0.3s ease;
    }

    .skill-tag:hover {
      background: rgba(0, 255, 200, 0.2);
      transform: translateY(-3px);
      box-shadow: 0 5px 15px rgba(0, 255, 200, 0.1);
    }

    /* Projecten sectie */
    .project-list {
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }

    .project {
      background: linear-gradient(145deg, #1a1a1a, #151515);
      padding: 1.5rem;
      border-radius: 16px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
      transition: all 0.3s ease;
      border: 1px solid rgba(255, 255, 255, 0.05);
      position: relative;
      overflow: hidden;
      display: flex;
      flex-direction: column;
      gap: 1rem;
    }

    .project::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 4px;
      height: 100%;
      background: var(--accent);
    }

    .project:hover {
      transform: translateY(-5px);
      box-shadow: 0 15px 35px rgba(0, 255, 200, 0.2);
    }

    .project-icon {
      font-size: 2rem;
      color: var(--accent);
    }

    .project h3 {
      font-size: 1.3rem;
      color: var(--accent);
    }

    .project p {
      color: var(--text-secondary);
      line-height: 1.6;
    }

    .project-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
    }

    .project-tags span {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-secondary);
      padding: 0.3rem 0.6rem;
      border-radius: 20px;
      font-size: 0.7rem;
    }

    /* Services sectie */
    .services-grid {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }

    .services-grid li {
      background: rgba(255, 255, 255, 0.03);
      padding: 1.5rem;
      border-radius: 12px;
      display: flex;
      gap: 1rem;
      transition: all 0.3s ease;
      border: 1px solid rgba(255, 255, 255, 0.05);
    }

    .services-grid li:hover {
      background: rgba(0, 255, 200, 0.05);
      transform: translateY(-3px);
      box-shadow: 0 10px 25px rgba(0, 255, 200, 0.1);
    }

    .service-icon {
      font-size: 1.5rem;
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      min-width: 50px;
      height: 50px;
      border-radius: 50%;
      background: rgba(0, 255, 200, 0.1);
    }

    .service-content h3 {
      font-size: 1.2rem;
      margin-bottom: 0.5rem;
      color: var(--text);
    }

    .service-content p {
      color: var(--text-secondary);
      line-height: 1.6;
      font-size: 0.9rem;
    }

    /* Contact sectie */
    .contact-container {
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }

    form {
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }

    .form-group {
      position: relative;
    }

    input, textarea {
      width: 100%;
      padding: 1rem 1rem 1rem 2.5rem;
      border: none;
      border-radius: 8px;
      font-size: 1rem;
      font-family: inherit;
      background: rgba(15, 15, 15, 0.7);
      color: var(--text);
      border: 1px solid rgba(255, 255, 255, 0.1);
      transition: all 0.3s ease;
    }

    input:focus, textarea:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 2px rgba(0, 255, 200, 0.2);
    }

    .form-group i {
      position: absolute;
      left: 0.8rem;
      top: 50%;
      transform: translateY(-50%);
      color: var(--text-secondary);
      transition: all 0.3s ease;
    }

    .form-group:focus-within i {
      color: var(--accent);
    }

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

    button {
      background: var(--accent);
      color: var(--primary-bg);
      font-weight: 600;
      padding: 1rem 1.5rem;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.3s ease;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      font-size: 1rem;
    }

    button:hover {
      background: var(--accent-dark);
      transform: translateY(-3px);
      box-shadow: 0 10px 20px rgba(0, 255, 200, 0.2);
    }

    .contact-info {
      display: flex;
      flex-direction: column;
      gap: 1.2rem;
    }

    .info-item {
      display: flex;
      align-items: center;
      gap: 1rem;
      padding: 1.2rem;
      background: rgba(255, 255, 255, 0.03);
      border-radius: 8px;
      transition: all 0.3s ease;
    }

    .info-item:hover {
      background: rgba(0, 255, 200, 0.05);
      transform: translateX(3px);
    }

    .info-icon {
      width: 45px;
      height: 45px;
      border-radius: 50%;
      background: rgba(0, 255, 200, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      color: var(--accent);
    }

    .info-content h4 {
      font-size: 1rem;
      margin-bottom: 0.3rem;
      color: var(--text);
    }

    .info-content p {
      color: var(--text-secondary);
      font-size: 0.9rem;
    }

    /* Contact feedback */
    #contact-feedback {
      margin-top: 1.5rem;
      font-weight: bold;
      padding: 1rem;
      border-radius: 8px;
      text-align: center;
    }

    /* Navigatiepijlen */
    .scroll-nav {
      position: fixed;
      right: 1rem;
      top: 50%;
      transform: translateY(-50%);
      display: flex;
      flex-direction: column;
      gap: 1rem;
      z-index: 90;
    }

    .scroll-btn {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(15, 15, 15, 0.8);
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: var(--text);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.3s ease;
      backdrop-filter: blur(10px);
    }

    .scroll-btn:hover {
      background: var(--accent);
      color: var(--primary-bg);
      transform: scale(1.1);
    }

    /* Progress indicator */
    .progress-container {
      position: fixed;
      bottom: 1.5rem;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      gap: 0.8rem;
      z-index: 90;
      background: rgba(15, 15, 15, 0.8);
      padding: 0.6rem 1.2rem;
      border-radius: 50px;
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .progress-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.2);
      cursor: pointer;
      transition: all 0.3s ease;
    }

    .progress-dot.active {
      background: var(--accent);
      transform: scale(1.3);
    }

    /* Footer */
    footer {
      background: var(--secondary-bg);
      padding: 1.5rem;
      text-align: center;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .footer-content {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      flex-direction: row;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
    }

    .social-links {
      display: flex;
      gap: 0.8rem;
    }

    .social-links a {
      width: 35px;
      height: 35px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.05);
      color: var(--text);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s ease;
    }

    .social-links a:hover {
      background: var(--accent);
      color: var(--primary-bg);
      transform: translateY(-3px);
    }

    /* Mobile menu */
    .mobile-nav {
      position: fixed;
      top: 0;
      right: -100%;
      width: 70%;
      height: 100vh;
      background: rgba(15, 15, 15, 0.98);
      backdrop-filter: blur(10px);
      z-index: 99;
      padding: 5rem 2rem;
      transition: right 0.3s ease;
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }

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

    .mobile-nav ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 1.5rem;
    }

    .mobile-nav a {
      text-decoration: none;
      color: var(--text);
      font-weight: 500;
      font-size: 1.2rem;
      display: flex;
      align-items: center;
      gap: 1rem;
      padding: 0.5rem 0;
    }

    .mobile-nav a.active {
      color: var(--accent);
    }

    .overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.7);
      z-index: 98;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s ease;
    }

    .overlay.active {
      opacity: 1;
      visibility: visible;
    }

    /* Responsive aanpassingen */
    @media (min-width: 768px) {
      .panel {
        padding: 3rem 2rem;
      }
      
      .content-wrapper {
        padding: 2rem;
      }
      
      .profile-section {
        flex-direction: row;
        align-items: center;
      }
      
      .profile-visual {
        order: 0;
      }
      
      .visual-element {
        width: 200px;
        height: 200px;
        font-size: 4rem;
      }
      
      .project-list {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
      }
      
      .services-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
      }
      
      .contact-container {
        flex-direction: row;
      }
    }

    @media (min-width: 1024px) {
      .project-list {
        grid-template-columns: repeat(3, 1fr);
      }
      
      .services-grid {
        grid-template-columns: repeat(3, 1fr);
      }
      
      .panel h2 {
        font-size: 3.5rem;
      }
    }

    @media (max-width: 767px) {
      body {
        overflow-x: hidden;
      }
      
      main {
        flex-direction: column;
        width: 100%;
      }
      
      .panel {
        width: 100%;
        min-height: auto;
        padding: 5rem 1rem 2rem;
      }
      
      .scroll-nav, .progress-container {
        display: none;
      }
      
      header {
        height: var(--mobile-header-height);
        padding: 0 1rem;
      }
      
      nav ul {
        display: none;
      }
      
      .mobile-menu-btn {
        display: block;
      }
      
      .stats-container {
        flex-direction: column;
        gap: 1rem;
      }
      
      .panel h2 {
        font-size: 2.2rem;
      }
    }

    @media (max-width: 480px) {
      .logo {
        font-size: 1.5rem;
      }
      
      .panel {
        padding: 4rem 1rem 2rem;
      }
      
      .visual-element {
        width: 120px;
        height: 120px;
        font-size: 2.5rem;
      }
      
      .stat-number {
        font-size: 1.8rem;
      }
    }