:root {
    --bg:        #0a0a0b;
    --bg-2:      #0f0f11;
    --bg-3:      #141417;
    --bg-4:      #1a1a1e;
    --border:    #222228;
    --border-2:  #2e2e36;
    --muted:     #3a3a45;
    --text-dim:  #5a5a6e;
    --text-mid:  #8a8a9e;
    --text:      #c8c8d8;
    --text-hi:   #e8e8f0;
    --accent:    #4af0a0;
    --accent-2:  #3ad8e0;
    --accent-dim:#1a4a38;
    --warn:      #f0944a;
    --font-mono: 'JetBrains Mono', 'Space Mono', monospace;
    --r:         4px;
    --r-lg:      8px;
    --transition: 0.2s ease;
  }

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

  html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden; /* iOS Safari: body alleine reicht nicht */
  }

  body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    width: 100%;
  }

  /* ─── NOISE OVERLAY ─── */
  body::before {
    content: '';
    position: fixed; inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
    opacity: 0.025;
    pointer-events: none;
    z-index: 9999;
  }

  /* ─── SCROLLBAR ─── */
  ::-webkit-scrollbar { width: 4px; }
  ::-webkit-scrollbar-track { background: var(--bg); }
  ::-webkit-scrollbar-thumb { background: var(--muted); border-radius: 2px; }

  /* ─── TYPOGRAPHY ─── */
  h1, h2, h3, h4 { color: var(--text-hi); font-weight: 500; letter-spacing: -0.02em; }
  h1 { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.1; }
  h2 { font-size: clamp(1.4rem, 3vw, 2rem); line-height: 1.2; }
  h3 { font-size: 1.1rem; }
  h4 { font-size: 0.8rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.15em; font-weight: 400; }
  p { color: var(--text-mid); max-width: 62ch; }
  a { color: var(--accent); text-decoration: none; transition: opacity var(--transition); }
  a:hover { opacity: 0.75; }

  .label {
    display: inline-block;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--accent);
    border: 1px solid var(--accent-dim);
    padding: 3px 10px;
    border-radius: 2px;
    margin-bottom: 1.5rem;
  }

  /* ─── LAYOUT ─── */
  .container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }
  section { padding: 6rem 0; }
  .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
  .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }

  @media (max-width: 768px) {
    .grid-2 { grid-template-columns: 1fr; gap: 2rem; }
    .grid-3 { grid-template-columns: 1fr; }
    section { padding: 4rem 0; }
  }

  /* ─── NAV ─── */
  nav.site-nav {
    position: fixed; top: 1.25rem; left: 0; right: 0;
    z-index: 100;
    padding: 0 2rem;
    pointer-events: none;
  }

  .nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0.875rem 1.75rem;
    background: rgba(15,15,17,0.94);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-2);
    border-radius: var(--r-lg);
    box-shadow: 0 4px 32px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.04);
    pointer-events: auto;
  }

  .nav-logo {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-hi);
    letter-spacing: -0.02em;
  }
  .nav-logo span { color: var(--accent); }

  .nav-links {
    display: flex; gap: 2rem; list-style: none; align-items: center;
  }
  .nav-links a {
    color: var(--text-mid);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    transition: color var(--transition);
    position: relative;
  }
  .nav-links a:hover { color: var(--text-hi); opacity: 1; }

  .nav-cta {
    background: transparent;
    border: 1px solid var(--accent-dim);
    color: var(--accent) !important;
    padding: 6px 18px;
    border-radius: var(--r);
    transition: background var(--transition), border-color var(--transition) !important;
  }
  .nav-cta:hover { background: var(--accent-dim) !important; border-color: var(--accent) !important; opacity: 1 !important; }

  /* ─── HERO ─── */
  #hero {
    min-height: 100vh;
    display: flex; align-items: center;
    padding: 8rem 0 6rem;
    position: relative;
    overflow: hidden;
  }

  .hero-grid {
    position: absolute; inset: 0;
    background-image:
      linear-gradient(var(--border) 1px, transparent 1px),
      linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.3;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
  }

  .hero-glow {
    position: absolute;
    width: 600px; height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(74,240,160,0.06) 0%, transparent 70%);
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
  }

  .hero-content { position: relative; z-index: 1; }
  .hero-content .label { margin-bottom: 2rem; }

  .hero-title {
    margin-bottom: 1.5rem;
  }
  .hero-title .line-accent { color: var(--accent); }
  .hero-title .line-dim { color: var(--text-mid); font-weight: 300; font-style: italic; }

  .hero-sub {
    font-size: 0.95rem;
    color: var(--text-mid);
    max-width: 52ch;
    margin-bottom: 3rem;
    line-height: 1.8;
  }

  .hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }

  .hero-stats {
    display: flex; gap: 3rem; margin-top: 5rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border);
  }
  .stat-num { font-size: 1.5rem; color: var(--text-hi); font-weight: 700; }
  .stat-label { font-size: 0.7rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.15em; }

  /* ─── BUTTONS ─── */
  .btn {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    padding: 12px 28px;
    border-radius: var(--r);
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    text-decoration: none;
  }

  .btn-primary {
    background: var(--accent);
    color: #060c0a;
    font-weight: 700;
  }
  .btn-primary:hover { background: #6ffab8; opacity: 1; color: #060c0a; }

  .btn-outline {
    background: transparent;
    border: 1px solid var(--border-2);
    color: var(--text-mid);
  }
  .btn-outline:hover { border-color: var(--accent); color: var(--accent); opacity: 1; }

  /* ─── SERVICES OVERVIEW ─── */
  .service-card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    transition: border-color var(--transition), transform var(--transition);
    text-decoration: none;
    display: block;
  }
  .service-card::before {
    content: '';
    position: absolute; top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
    opacity: 0;
    transition: opacity var(--transition);
  }
  .service-card:hover { border-color: var(--border-2); transform: translateY(-3px); opacity: 1; }
  .service-card:hover::before { opacity: 1; }

  .card-icon {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    display: block;
  }
  .card-num {
    position: absolute; top: 1.5rem; right: 1.5rem;
    font-size: 0.6rem; color: var(--muted); letter-spacing: 0.2em;
  }
  .service-card h3 { color: var(--text-hi); margin-bottom: 0.75rem; font-size: 1rem; }
  .service-card p { font-size: 0.8rem; color: var(--text-dim); max-width: none; }

  .card-link {
    display: inline-block;
    margin-top: 1.5rem;
    font-size: 0.7rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
  }

  /* ─── SECTION HEADERS ─── */
  .section-header { margin-bottom: 4rem; }
  .section-header h2 { margin-bottom: 1rem; }
  .section-header p { font-size: 0.9rem; }

  /* ─── PROCESS STEPS ─── */
  .process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
  @media (max-width: 768px) { .process-steps { grid-template-columns: 1fr 1fr; gap: 1rem; } }
  @media (max-width: 560px) { .process-steps { grid-template-columns: 1fr; } }

  .step {
    padding: 2rem;
    border: 1px solid var(--border);
    border-right: none;
    position: relative;
  }
  .step:last-child { border-right: 1px solid var(--border); }
  .step-num {
    font-size: 0.6rem; color: var(--muted);
    text-transform: uppercase; letter-spacing: 0.2em;
    margin-bottom: 1rem;
  }
  .step h4 { color: var(--text); font-size: 0.85rem; text-transform: none; letter-spacing: 0; margin-bottom: 0.5rem; }
  .step p { font-size: 0.78rem; color: var(--text-dim); max-width: none; }

  .step::after {
    content: '→';
    position: absolute; right: -0.75rem; top: 50%;
    transform: translateY(-50%);
    color: var(--accent);
    font-size: 0.9rem;
    z-index: 1;
    background: var(--bg);
    padding: 2px 4px;
  }
  .step:last-child::after { display: none; }

  /* ─── USE CASES ─── */
  .usecase-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
  @media (max-width: 768px) { .usecase-list { grid-template-columns: 1fr; } }

  .usecase-list li {
    padding: 1rem 1.25rem;
    border: 1px solid var(--border);
    border-radius: var(--r);
    font-size: 0.82rem;
    color: var(--text-mid);
    display: flex; align-items: center; gap: 0.75rem;
  }
  .usecase-list li::before {
    content: '▸';
    color: var(--accent);
    flex-shrink: 0;
  }

  /* ─── BENEFIT PILLS ─── */
  .benefits { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 2rem; }
  .benefit {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 8px 16px;
    font-size: 0.78rem;
    color: var(--text-mid);
  }
  .benefit-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }

  /* ─── CONTACT FORM ─── */
  .form-card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 3rem;
  }

  .form-group { margin-bottom: 1.5rem; }
  label {
    display: block;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
  }
  input, textarea, select {
    width: 100%;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 12px 16px;
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text);
    transition: border-color var(--transition);
    outline: none;
    -webkit-appearance: none;
  }
  input::placeholder, textarea::placeholder { color: var(--muted); }
  input:focus, textarea:focus, select:focus { border-color: var(--accent); }
  textarea { resize: vertical; min-height: 120px; }
  select { cursor: pointer; }
  select option { background: var(--bg-3); }

  .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
  @media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

  /* ─── BLOG EMPTY STATE ─── */
  .blog-empty {
    padding: 4rem 2rem;
    text-align: center;
    border: 1px dashed var(--border-2);
    border-radius: var(--r-lg);
  }
  .blog-empty-icon {
    display: block;
    font-size: 2rem;
    color: var(--muted);
    margin-bottom: 1.25rem;
  }
  .blog-empty-title {
    color: var(--text-mid);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    max-width: none;
  }
  .blog-empty-sub {
    color: var(--text-dim);
    font-size: 0.75rem;
    max-width: none;
  }
  .blog-empty-sub code {
    color: var(--accent);
    background: var(--bg-3);
    padding: 1px 6px;
    border-radius: 2px;
    border: 1px solid var(--border);
  }

  /* ─── BLOG FILTERS ─── */
  .blog-filters {
    display: flex; gap: 0.5rem; flex-wrap: wrap;
    margin-bottom: 2.5rem;
  }
  .filter-btn {
    background: transparent;
    border: 1px solid var(--border-2);
    color: var(--text-mid);
    padding: 6px 18px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: var(--r);
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
  }
  .filter-btn:hover { color: var(--text-hi); border-color: var(--accent-dim); }
  .filter-btn.active { color: var(--accent); border-color: var(--accent); background: var(--accent-dim); }

  /* ─── BLOG ─── */
  .post-card {
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 2rem;
    transition: border-color var(--transition);
    text-decoration: none;
    display: block;
  }
  .post-card:hover { border-color: var(--border-2); opacity: 1; }

  .post-meta {
    display: flex; align-items: center; gap: 1rem;
    font-size: 0.68rem; color: var(--text-dim);
    text-transform: uppercase; letter-spacing: 0.1em;
    margin-bottom: 1rem;
  }
  .post-tag {
    background: var(--bg-3);
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: 2px;
    color: var(--accent);
  }
  .post-card h3 { font-size: 1rem; color: var(--text-hi); margin-bottom: 0.75rem; }
  .post-card p { font-size: 0.8rem; color: var(--text-dim); max-width: none; }
  .post-readmore { display: inline-block; margin-top: 1rem; font-size: 0.7rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em; }

  /* ─── BLOG POST DETAIL ─── */
  .post-article {
    max-width: 100%;
  }
  .post-meta-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
  }
  .post-meta-header .label {
    margin-bottom: 0;
  }
  .post-date {
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-left: 1rem;
  }
  .post-title {
    margin-bottom: 2rem;
  }
  .post-article p {
    margin-bottom: 1.5rem;
  }
  .post-article h3 {
    margin-top: 2.5rem;
    margin-bottom: 1rem;
  }
  .post-article img {
    max-width: 100%;
    height: auto;
    border-radius: var(--r-lg);
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
    display: block;
  }

  /* ─── DIVIDERS ─── */
  hr { border: none; border-top: 1px solid var(--border); }

  /* ─── INLINE CODE ─── */
  code {
    background: var(--bg-3);
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 0.8em;
    color: var(--accent);
  }

  /* ─── TERMINAL BLOCK ─── */
  .terminal {
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 1.5rem 2rem;
    font-size: 0.8rem;
    overflow-x: auto; /* lange Zeilen scrollen innerhalb des Blocks */
    -webkit-overflow-scrolling: touch;
  }
  .terminal-bar {
    display: flex; gap: 6px; margin-bottom: 1.25rem;
  }
  .dot { width: 10px; height: 10px; border-radius: 50%; }
  .dot-r { background: #ff5f57; }
  .dot-y { background: #febc2e; }
  .dot-g { background: #28c840; }
  .terminal-line { color: var(--text-dim); margin-bottom: 0.35rem; }
  .terminal-line .prompt { color: var(--accent); margin-right: 0.5rem; }
  .terminal-line .cmd { color: var(--text); }
  .terminal-line.out { color: var(--text-mid); padding-left: 1.5rem; }
  .terminal-line.success {
    color: var(--accent);
    background: rgba(74, 240, 160, 0.08);
    border-left: 2px solid var(--accent);
    padding: 0.35rem 0.75rem;
    margin-top: 0.5rem;
    border-radius: 0 3px 3px 0;
  }
  .terminal-label {
    font-size: 0.7rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.6rem;
    opacity: 0.6;
  }

  /* ─── FOOTER ─── */
  footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border);
  }
  .footer-inner {
    display: flex; align-items: center; justify-content: space-between;
    flex-wrap: wrap; gap: 1rem;
  }
  .footer-brand { font-size: 0.82rem; color: var(--text-dim); }
  .footer-brand strong { color: var(--text-hi); }
  .footer-links { display: flex; gap: 2rem; }
  .footer-links a { font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.1em; }

  /* ─── PAGE SECTIONS ─── */
  .page-section { display: none; }
  .page-section.active { display: block; }

  /* ─── NAV MOBILE ─── */
  .nav-mobile-toggle { display: none; background: none; border: 1px solid var(--border-2); color: var(--text-mid); padding: 6px 12px; font-family: var(--font-mono); font-size: 0.7rem; cursor: pointer; border-radius: var(--r); }
  @media (max-width: 700px) {
    nav.site-nav { top: 0.75rem; padding: 0 1rem; }
    .nav-links { display: none; position: absolute; top: calc(100% + 0.5rem); left: 0; right: 0; background: rgba(15,15,17,0.97); backdrop-filter: blur(24px); flex-direction: column; gap: 0; padding: 0.5rem; border: 1px solid var(--border-2); border-radius: var(--r-lg); box-shadow: 0 8px 32px rgba(0,0,0,0.5); }
    .nav-links li { width: 100%; }
    .nav-links a { display: block; padding: 0.65rem 1rem; border-radius: var(--r); }
    .nav-links a:hover { background: var(--bg-3); }
    .nav-links.open { display: flex; }
    .nav-mobile-toggle { display: block; }
  }

  /* ─── ANIMATIONS ─── */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .fade-in { animation: fadeUp 0.5s ease forwards; }
  .fade-in-1 { animation-delay: 0.1s; opacity: 0; }
  .fade-in-2 { animation-delay: 0.2s; opacity: 0; }
  .fade-in-3 { animation-delay: 0.3s; opacity: 0; }
  .fade-in-4 { animation-delay: 0.4s; opacity: 0; }

  /* ─── SPEC TABLE ─── */
  .spec-table { width: 100%; border-collapse: collapse; }
  .spec-table td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    font-size: 0.8rem;
  }
  .spec-table td:first-child { color: var(--text-dim); background: var(--bg-3); width: 40%; }
  .spec-table td:last-child { color: var(--text); }

  /* ─── ACTIVE NAV LINK ─── */
  .nav-links a.nav-active { color: var(--accent); }

  /* Desktop: Dot unter dem Link */
  .nav-links a.nav-active::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 50%; transform: translateX(-50%);
    width: 4px; height: 4px;
    background: var(--accent);
    border-radius: 50%;
  }

  /* Mobile: Dot deaktivieren, linker Balken als Indikator */
  @media (max-width: 700px) {
    .nav-links a.nav-active::after { content: none; }
    .nav-links a.nav-active {
      background: var(--bg-3);
      border-left: 2px solid var(--accent);
      padding-left: calc(1rem - 2px);
    }
  }