:root {
      --bg: #0f172a;
      --bg-light: #1e293b;
      --card: rgba(30, 41, 59, 0.85);
      --text: #e2e8f0;
      --muted: #94a3b8;
      --primary: #38bdf8;
      --secondary: #22c55e;
      --border: rgba(148, 163, 184, 0.15);
      --shadow: 0 10px 35px rgba(0, 0, 0, 0.35);
      --radius: 22px;
      --max-width: 1150px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: Arial, sans-serif;
      background:
        radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), transparent 30%),
        radial-gradient(circle at top right, rgba(34, 197, 94, 0.1), transparent 25%),
        linear-gradient(135deg, #020617 0%, #0f172a 45%, #111827 100%);
      color: var(--text);
      line-height: 1.6;
    }

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

    img {
      max-width: 100%;
      display: block;
    }

    .container {
      width: min(92%, var(--max-width));
      margin: 0 auto;
    }

    /* NAV */
    nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      backdrop-filter: blur(12px);
      background: rgba(15, 23, 42, 0.7);
      border-bottom: 1px solid var(--border);
    }

    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 0;
    }

    .logo {
      font-size: 1.15rem;
      font-weight: bold;
      letter-spacing: 0.5px;
      color: #fff;
    }

    .logo span {
      color: var(--primary);
    }

    .nav-links {
      display: flex;
      gap: 22px;
      flex-wrap: wrap;
    }

    .nav-links a {
      color: var(--muted);
      transition: 0.25s;
      font-size: 0.95rem;
    }

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

    /* HERO */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding: 80px 0 40px;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .badge {
      display: inline-block;
      padding: 8px 14px;
      border: 1px solid rgba(56, 189, 248, 0.25);
      background: rgba(56, 189, 248, 0.08);
      color: var(--primary);
      border-radius: 999px;
      font-size: 0.9rem;
      margin-bottom: 20px;
    }

    .hero h1 {
      font-size: clamp(2.5rem, 7vw, 4.8rem);
      line-height: 1.05;
      margin-bottom: 18px;
    }

    .hero h1 span {
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero p {
      color: var(--muted);
      max-width: 650px;
      font-size: 1.05rem;
      margin-bottom: 28px;
    }

    .hero-buttons {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 30px;
    }

    .btn {
      padding: 13px 22px;
      border-radius: 999px;
      font-weight: bold;
      transition: 0.25s ease;
      display: inline-block;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      color: #fff;
      box-shadow: 0 12px 30px rgba(56, 189, 248, 0.2);
    }

    .btn-primary:hover {
      transform: translateY(-2px) scale(1.02);
    }

    .btn-secondary {
      border-color: var(--border);
      background: rgba(255, 255, 255, 0.03);
      color: var(--text);
    }

    .btn-secondary:hover {
      border-color: rgba(56, 189, 248, 0.4);
      color: var(--primary);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 14px;
    }

    .stat {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 18px;
      padding: 18px;
      box-shadow: var(--shadow);
      text-align: center;
    }

    .stat h3 {
      font-size: 1.5rem;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .stat p {
      margin: 0;
      font-size: 0.9rem;
      color: var(--muted);
    }

    .hero-card {
      background: linear-gradient(180deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
      border: 1px solid var(--border);
      border-radius: 28px;
      padding: 28px;
      box-shadow: var(--shadow);
    }

    .profile-circle {
      width: 110px;
      height: 110px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 2rem;
      font-weight: bold;
      color: white;
      margin-bottom: 20px;
    }

    .hero-card h3 {
      margin-bottom: 10px;
      font-size: 1.4rem;
    }

    .hero-card p {
      color: var(--muted);
      margin-bottom: 20px;
    }

    .mini-list {
      display: grid;
      gap: 12px;
    }

    .mini-item {
      padding: 14px 16px;
      border-radius: 16px;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border);
      color: var(--text);
    }

    .mini-item span {
      display: block;
      color: var(--muted);
      font-size: 0.88rem;
      margin-top: 3px;
    }

    /* SECTIONS */
    section {
      padding: 90px 0;
    }

    .section-title {
      font-size: 2rem;
      margin-bottom: 14px;
      text-align: center;
    }

    .section-subtitle {
      text-align: center;
      color: var(--muted);
      max-width: 700px;
      margin: 0 auto 45px;
    }

    /* ABOUT */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }

    .card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
    }

    .card h3 {
      margin-bottom: 14px;
      font-size: 1.3rem;
    }

    .card p {
      color: var(--muted);
    }

    .info-list {
      display: grid;
      gap: 14px;
      margin-top: 10px;
    }

    .info-row {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding-bottom: 10px;
      border-bottom: 1px solid var(--border);
      color: var(--muted);
    }

    .info-row strong {
      color: var(--text);
    }

    /* SKILLS */
    .skills-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 22px;
    }

    .skill-box {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow);
    }

    .skill {
      margin-bottom: 18px;
    }

    .skill:last-child {
      margin-bottom: 0;
    }

    .skill-top {
      display: flex;
      justify-content: space-between;
      margin-bottom: 8px;
      font-size: 0.95rem;
    }

    .skill-top span:last-child {
      color: var(--primary);
      font-weight: bold;
    }

    .bar {
      width: 100%;
      height: 10px;
      background: #334155;
      border-radius: 999px;
      overflow: hidden;
    }

    .progress {
      width: 0;
      height: 100%;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--secondary), var(--primary));
      transition: width 1.3s ease;
    }

    /* PROJECTS */
    .projects-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .project-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      transition: 0.25s ease;
    }

    .project-card:hover {
      transform: translateY(-5px);
      border-color: rgba(56, 189, 248, 0.35);
    }

    .project-top {
      padding: 26px;
      background: linear-gradient(135deg, rgba(56, 189, 248, 0.13), rgba(34, 197, 94, 0.09));
      border-bottom: 1px solid var(--border);
    }

    .project-top h3 {
      margin-bottom: 8px;
    }

    .project-body {
      padding: 24px;
    }

    .project-body p {
      color: var(--muted);
      margin-bottom: 18px;
    }

    .tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .tag {
      padding: 7px 12px;
      border-radius: 999px;
      font-size: 0.82rem;
      background: rgba(56, 189, 248, 0.08);
      border: 1px solid rgba(56, 189, 248, 0.18);
      color: var(--primary);
    }

    /* TIMELINE */
    .timeline {
      max-width: 850px;
      margin: 0 auto;
      display: grid;
      gap: 18px;
    }

    .timeline-item {
      background: var(--card);
      border: 1px solid var(--border);
      border-left: 4px solid var(--primary);
      border-radius: 18px;
      padding: 22px;
      box-shadow: var(--shadow);
    }

    .timeline-item h3 {
      margin-bottom: 6px;
    }

    .timeline-item .meta {
      color: var(--primary);
      font-size: 0.92rem;
      margin-bottom: 8px;
    }

    .timeline-item p {
      color: var(--muted);
    }

    /* CONTACT */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .contact-box {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
    }

    .contact-links {
      display: grid;
      gap: 14px;
      margin-top: 16px;
    }

    .contact-link {
      padding: 14px 16px;
      border-radius: 16px;
      border: 1px solid var(--border);
      background: rgba(255,255,255,0.03);
      transition: 0.25s;
    }

    .contact-link:hover {
      border-color: rgba(56, 189, 248, 0.4);
      color: var(--primary);
    }

    form {
      display: grid;
      gap: 14px;
    }

    input, textarea {
      width: 100%;
      padding: 14px 16px;
      border-radius: 14px;
      border: 1px solid var(--border);
      background: rgba(255,255,255,0.03);
      color: var(--text);
      outline: none;
    }

    input:focus, textarea:focus {
      border-color: rgba(56, 189, 248, 0.5);
    }

    textarea {
      min-height: 130px;
      resize: vertical;
    }

    /* FOOTER */
    footer {
      padding: 30px 0 50px;
      text-align: center;
      color: var(--muted);
      border-top: 1px solid var(--border);
      margin-top: 30px;
    }

    /* ANIMATION */
    .reveal {
      opacity: 0;
      transform: translateY(30px);
      transition: 0.8s ease;
    }

    .reveal.active {
      opacity: 1;
      transform: translateY(0);
    }

    /* RESPONSIVE */
    @media (max-width: 950px) {
      .hero-grid,
      .about-grid,
      .contact-grid,
      .skills-grid,
      .projects-grid {
        grid-template-columns: 1fr;
      }

      .hero {
        min-height: auto;
        padding-top: 60px;
      }

      .hero-stats {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 700px) {
      .nav-inner {
        flex-direction: column;
        gap: 14px;
      }

      .nav-links {
        justify-content: center;
      }

      .hero h1 {
        font-size: 2.4rem;
      }

      .section-title {
        font-size: 1.7rem;
      }

      .info-row {
        flex-direction: column;
        gap: 6px;
      }
    }
    footer {
      padding: 30px 0 50px;
      text-align: center;
      color: var(--muted);
      border-top: 1px solid var(--border);
      margin-top: 30px;
    }
    footer a {
      color: var(--muted);
      transition: 0.25s;
    }
    footer a:hover {
      color: var(--primary);
    }
    /* impressum */
    .impressum {
      max-width: 700px;
      margin: 40px auto;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
    }