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

  :root {
    --bg: #0a0a10;
    --surface: #14141c;
    --card: #1a1a26;
    --border: #2a2a3a;
    --text: #ffffff;
    --muted: #9ca3af;
    --accent: #a855f7;
    --accent-soft: #c084fc;
    --accent-deep: #7b4397;
    --accent-dim: rgba(168,85,247,0.14);
    --accent-glow: rgba(168,85,247,0.45);
  }

  html, body {
    width: 100%; height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    /* On dark themes, default subpixel rendering looks chunky / over-sharpened.
       Force grayscale antialiasing for crisp light-on-dark text. */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    font-feature-settings: 'cv11', 'ss01', 'ss03', 'calt', 'kern';
    overflow: hidden;
  }

  /* Inter optical tightening: at large display sizes, tighter tracking reads
     more deliberate. Body text stays at default tracking. */
  h1, h2 { letter-spacing: -0.025em; }
  h3 { letter-spacing: -0.015em; }

  /* ── Slide container ── */
  .deck {
    width: 100vw; height: 100vh;
    position: relative;
  }

  .slide {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    /* Top padding clears the fixed .slide-badge so eyebrow headlines never
       overlap it on short viewports. */
    padding: 80px 60px 60px;
    opacity: 0;
    pointer-events: none;
    transform: translateX(60px);
    transition: opacity .45s ease, transform .45s ease;
  }

  .slide.active {
    opacity: 1;
    pointer-events: all;
    transform: translateX(0);
  }

  .slide.exit {
    opacity: 0;
    transform: translateX(-60px);
    pointer-events: none;
  }

  .slide-inner {
    width: 100%;
    max-width: 960px;
    display: flex;
    flex-direction: column;
    gap: 36px;
  }

  /* ── Typography ── */
  .eyebrow {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent);
  }

  h1 { font-size: clamp(44px, 6vw, 72px); font-weight: 800; line-height: 1.05; }
  h2 { font-size: clamp(32px, 4.5vw, 52px); font-weight: 800; line-height: 1.1; }
  h3 { font-size: clamp(18px, 2.5vw, 26px); font-weight: 700; }

  .subtitle { font-size: clamp(18px, 2vw, 24px); color: var(--muted); line-height: 1.5; }
  .accent-text { color: var(--accent); }

  /* ── Card Grid ── */
  .card-grid {
    display: grid;
    gap: 20px;
  }
  .card-grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
  .card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
  .card-grid.cols-4 { grid-template-columns: repeat(4, 1fr); }

  .card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: border-color .2s;
  }
  .card:hover { border-color: var(--accent); }

  .card .icon { font-size: 36px; }

  /* Modern SVG icon: rounded badge with stroke glyph in accent color */
  .icon.icon-svg {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--accent-dim);
    border: 1px solid rgba(168,85,247,0.25);
    color: var(--accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0;
  }
  .icon.icon-svg svg {
    width: 26px;
    height: 26px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
  }

  /* Dial-back modifier: strip the badge, keep the stroke glyph in accent color.
     Remove `bare-icons` from a slide's class list to restore the badge look. */
  .bare-icons .icon.icon-svg {
    width: auto;
    height: auto;
    background: transparent;
    border: none;
    border-radius: 0;
    align-self: flex-start;
    justify-content: flex-start;
  }
  .bare-icons .icon.icon-svg svg {
    width: 34px;
    height: 34px;
    stroke-width: 1.6;
  }

  /* Small inline stroke icon, sized to sit next to body/UI text. */
  .icon-inline {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
    flex-shrink: 0;
  }

  /* Slide 12 footer flag: small muted text with an accent-colored inline icon. */
  .flag {
    font-size: 14px;
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .flag .icon-inline {
    color: var(--accent);
  }

  /* Slide 5 right-side feature illustration: large stroke phone, kept centered. */
  .card.feature-illustration {
    justify-content: center;
    align-items: center;
    min-height: 220px;
    text-align: center;
    gap: 16px;
  }
  .feature-illustration .illustration {
    color: var(--accent);
  }
  .feature-illustration .illustration svg {
    width: 88px;
    height: 88px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.4;
    stroke-linecap: round;
    stroke-linejoin: round;
  }
  .card h3 { font-size: 18px; }
  .card p { font-size: 14px; color: var(--muted); line-height: 1.5; }

  /* ── Stat Row ── */
  .stat-row {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(3, 1fr);
  }

  .stat-box {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    display: flex; flex-direction: column; gap: 8px;
  }

  .stat-number {
    font-size: clamp(40px, 5vw, 64px);
    font-weight: 900;
    color: var(--accent);
    line-height: 1;
  }

  .stat-label {
    font-size: 14px;
    color: var(--muted);
    font-weight: 600;
    letter-spacing: .5px;
  }

  /* ── Step Flow ── */
  .step-flow {
    display: flex;
    gap: 20px;
    align-items: stretch;
  }

  .step {
    flex: 1;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px 24px;
    display: flex; flex-direction: column; gap: 12px;
    align-items: flex-start;
    position: relative;
  }

  .step + .step::before {
    content: '→';
    position: absolute;
    left: -22px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 22px;
    color: var(--accent);
    z-index: 10;
  }

  .step-num {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    font-weight: 800;
    font-size: 16px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
  }

  .step .icon { font-size: 32px; }
  .step h3 { font-size: 16px; }
  .step p { font-size: 13px; color: var(--muted); line-height: 1.5; }

  /* ── Comparison ── */
  .comparison {
    display: grid;
    grid-template-columns: 1fr 64px 1fr;
    gap: 0;
    align-items: center;
  }

  .comp-side {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px 28px;
    display: flex; flex-direction: column; gap: 16px;
  }

  .comp-side.right {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--card) 60%, rgba(168,85,247,0.12));
  }

  .comp-label {
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--muted);
  }

  .comp-side.right .comp-label { color: var(--accent); }

  .comp-vs {
    text-align: center;
    font-size: 18px;
    font-weight: 800;
    color: var(--muted);
  }

  .comp-list { display: flex; flex-direction: column; gap: 10px; }
  .comp-item { display: flex; align-items: center; gap: 10px; font-size: 15px; }
  .comp-item .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); flex-shrink: 0; }
  .comp-side.right .comp-item .dot { background: var(--accent); }

  /* ── Icon List ── */
  .icon-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .icon-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px 24px;
  }

  .icon-item .icon { font-size: 28px; flex-shrink: 0; margin-top: 2px; }
  .icon-item-text h3 { font-size: 17px; margin-bottom: 4px; }
  .icon-item-text p { font-size: 14px; color: var(--muted); line-height: 1.5; }

  /* ── Quote ── */
  .quote-block {
    background: var(--card);
    border: 1px solid var(--border);
    border-left: 4px solid var(--accent);
    border-radius: 16px;
    padding: 40px 40px;
    position: relative;
  }

  .quote-mark {
    font-size: 80px;
    line-height: 0.5;
    color: var(--accent);
    font-family: Georgia, serif;
    margin-bottom: 16px;
    display: block;
  }

  .quote-text {
    font-size: clamp(18px, 2vw, 24px);
    font-style: italic;
    line-height: 1.55;
    color: var(--text);
  }

  .quote-attr {
    margin-top: 20px;
    font-size: 14px;
    color: var(--muted);
    font-weight: 600;
  }

  /* ── Big Stat Callout ── */
  .stat-callout {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .big-stat {
    font-size: clamp(80px, 12vw, 120px);
    font-weight: 900;
    color: var(--accent);
    line-height: 1;
    text-shadow: 0 0 80px var(--accent-glow);
  }

  .big-stat-label {
    font-size: clamp(18px, 2.5vw, 26px);
    color: var(--muted);
  }

  /* ── Title slide background ── */
  .slide-title {
    background:
      radial-gradient(ellipse 45% 40% at 85% 45%, rgba(168,85,247,0.22) 0%, transparent 65%),
      radial-gradient(ellipse 30% 30% at 15% 85%, rgba(192,132,252,0.10) 0%, transparent 60%),
      var(--bg);
  }

  /* ── CTA slide ── */
  .slide-cta {
    background:
      radial-gradient(ellipse 55% 50% at 50% 50%, rgba(168,85,247,0.28) 0%, transparent 65%),
      var(--bg);
  }
  /* Replaces the inline style="align-items:center;text-align:center;gap:32px"
     on slide 12 so it can be overridden at the responsive breakpoint. */
  .slide-cta-inner {
    align-items: center;
    text-align: center;
    gap: 32px;
  }

  .cta-box {
    background: var(--accent);
    color: #fff;
    border-radius: 16px;
    padding: 24px 48px;
    font-size: 20px;
    font-weight: 700;
    display: inline-block;
    text-align: center;
  }

  /* CTA button (slide 12): same visual weight as cta-box but interactive. */
  .cta-button {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 16px;
    padding: 18px 44px;
    font-size: 19px;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 8px 32px rgba(168,85,247,0.28);
    transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  }
  .cta-button:hover {
    background: var(--accent-soft);
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(168,85,247,0.42);
  }
  .cta-button:active {
    transform: translateY(0);
  }

  /* ── Contact modal ── */
  .modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
  }
  .modal.open { display: flex; }
  .modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.72);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
  }
  .modal-panel {
    position: relative;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 40px 36px 32px;
    width: 100%;
    max-width: 520px;
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    box-shadow: 0 24px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(168,85,247,0.08);
    text-align: left;
  }
  .modal-close {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
    transition: color .15s, border-color .15s;
  }
  .modal-close:hover {
    color: var(--text);
    border-color: var(--accent);
  }
  .modal-title {
    font-size: 24px;
    font-weight: 800;
    color: var(--text);
    margin: 0 0 6px;
    line-height: 1.2;
  }
  .modal-subtitle {
    font-size: 14px;
    color: var(--muted);
    margin: 0 0 24px;
    line-height: 1.5;
  }
  .modal-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .form-row input,
  .form-row textarea {
    width: 100%;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 14px;
    color: var(--text);
    font-size: 14px;
    font-family: inherit;
    box-sizing: border-box;
    transition: border-color .15s, box-shadow .15s;
  }
  .form-row textarea {
    resize: vertical;
    min-height: 100px;
    line-height: 1.4;
  }
  .form-row input::placeholder,
  .form-row textarea::placeholder {
    color: var(--muted);
  }
  .form-row input:focus,
  .form-row textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
  }
  .form-submit {
    margin-top: 4px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 14px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    transition: background .15s;
  }
  .form-submit:hover:not(:disabled) { background: var(--accent-soft); }
  .form-submit:disabled { opacity: 0.55; cursor: wait; }
  .modal-status {
    font-size: 13px;
    line-height: 1.4;
  }
  .modal-status:empty { display: none; }
  .modal-status--success {
    color: #4ade80;
    padding: 10px 12px;
    background: rgba(34,197,94,0.12);
    border: 1px solid rgba(34,197,94,0.3);
    border-radius: 8px;
  }
  .modal-status--error {
    color: #fca5a5;
    padding: 10px 12px;
    background: rgba(239,68,68,0.14);
    border: 1px solid rgba(239,68,68,0.32);
    border-radius: 8px;
  }
  body.modal-open { overflow: hidden; }

  .url-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 12px 24px;
    font-size: 16px;
    color: var(--accent);
    font-weight: 600;
  }

  /* ── Divider line ── */
  .divider {
    width: 60px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
  }

  /* ── Highlight pill ── */
  .pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--accent-dim);
    border: 1px solid rgba(168,85,247,0.4);
    border-radius: 999px;
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: .5px;
  }

  /* ── Two-column layout ── */
  .two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
  }

  /* ── Navigation ── */
  #nav {
    position: fixed;
    bottom: 28px;
    right: 32px;
    display: flex;
    align-items: center;
    gap: 16px;
    z-index: 100;
  }

  #counter {
    font-size: 13px;
    color: var(--muted);
    font-weight: 600;
    letter-spacing: 1px;
  }

  .nav-btn {
    width: 42px; height: 42px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    font-size: 18px;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: background .2s, border-color .2s;
  }

  .nav-btn:hover { background: var(--accent); border-color: var(--accent); }

  /* ── Progress bar ── */
  #progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    background: var(--accent);
    transition: width .4s ease;
    z-index: 200;
  }

  /* ── Slide number badge ── */
  .slide-badge {
    position: fixed;
    top: 24px; left: 32px;
    display: flex; align-items: center; gap: 8px;
    opacity: 0.4;
  }

  .logo-mark {
    width: 28px; height: 28px;
    border-radius: 6px;
    background: var(--accent);
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; font-weight: 900; color: #fff;
  }

  .logo-name { font-size: 13px; font-weight: 700; color: var(--muted); letter-spacing: 1px; }

  /* Muted "Zur Homepage" link, top-right. Mirrors the .slide-badge:
     same text style as #counter, same opacity:0.4 ghosting so it sits
     in the background while content scrolls past. Fades up on hover. */
  .homepage-link {
    position: fixed;
    top: 28px;
    right: 32px;
    font-size: 13px;
    color: var(--muted);
    font-weight: 600;
    letter-spacing: 1px;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    z-index: 100;
    opacity: 0.4;
    transition: opacity .15s, color .15s;
    font-family: inherit;
  }
  .homepage-link:hover { opacity: 1; color: var(--text); }
  .homepage-link svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
  }

  /* ── Responsive ── */
  @media (max-width: 768px) {
    .slide {
      /* Allow content taller than the viewport to scroll inside the slide.
         Switch justify-content so overflow is reachable from the top
         instead of stuck behind a vertically centered overflow.
         Top padding clears the fixed .slide-badge (top:24, h:~28).
         Bottom padding leaves enough black canvas under the last content
         block that the fixed nav buttons don't overlap it when scrolled. */
      padding: 140px 20px 70px;
      justify-content: flex-start;
      overflow-y: auto;
      overscroll-behavior: contain;
      -webkit-overflow-scrolling: touch;
    }
    .card-grid.cols-4,
    .card-grid.cols-3,
    .card-grid.cols-2,
    .stat-row { grid-template-columns: 1fr; }
    /* Fixed bottom margin on slide content. Every slide-inner has 80px of
       reserved space below its last child. Combined with the 70px slide
       padding-bottom (= nav footprint), that's 150px total trailing space —
       so the nav buttons always sit on black canvas, on every slide. */
    .slide-inner { padding-bottom: 80px; }
    /* Slide 12's CTA content is shorter than the viewport, so without this
       it sits at the top of the slide with a big void above the nav. Filling
       the slide and bottom-aligning the content gives the same fixed gap to
       the nav as every other slide. */
    .slide-cta-inner {
      min-height: 100%;
      justify-content: flex-end;
    }
    .step-flow { flex-direction: column; }
    .step + .step::before { content: '↓'; left: 50%; top: -18px; transform: translateX(-50%); }
    .comparison { grid-template-columns: 1fr; gap: 20px; }
    .comp-vs { display: none; }
    .two-col { grid-template-columns: 1fr; }
  }