/* ============================================================
   iQ · Privacy by Code — Stylesheet
   Inhalt:
     1.  Tokens (CSS Variables)
     2.  Reset & Base
     3.  Cursor & Noise Overlay
     4.  Navigation
     5.  Hero
     6.  Section Defaults
     7.  Privacy / The Filter
     8.  Token Demo
     9.  Interface Panels
     10. Pattern Rows & Trust Marker
     11. Verticals
     12. Differenzierungen
     13. Code Anchor
     14. Pathways
     15. Contact / Form
     16. Submit Button & Privacy Note
     17. Success State
     18. End Section
     19. Responsive (Mobile)
     20. Reduced Motion
   ============================================================ */


/* 1. Tokens
   ------------------------------------------------------------ */
:root {
  --void: #050508;
  --surface: #0D0D12;
  --deep: #0a8cb1;
  --lavender: #C4B5FD;
  --lavender-dim: rgba(196, 181, 253, 0.5);
  --lavender-glow: rgba(196, 181, 253, 0.08);
  --sage: #9CAF88;
  --sage-dim: rgba(156, 175, 136, 0.4);
  --sand: #D4C5B0;
  --sand-dim: rgba(212, 197, 176, 0.35);
  --line: rgba(255,255,255,0.06);
  --line-strong: rgba(255,255,255,0.12);
  --text-dim: rgba(255,255,255,0.3);
  --text-mid: rgba(255,255,255,0.6);
  --text-bright: rgba(255,255,255,0.92);
  --glow: rgba(10, 59, 73, 0.4);
}


/* 2. Reset & Base
   ------------------------------------------------------------ */
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

::selection { background: var(--deep); color: var(--text-bright); }

html { scroll-behavior: smooth; }

body {
  font-family: 'Instrument Sans', -apple-system, sans-serif;
  background: var(--void);
  color: var(--text-bright);
  overflow-x: hidden;
  cursor: default;
  -webkit-font-smoothing: antialiased;
}

@keyframes reveal { to { opacity: 1; transform: translateY(0); } }
@keyframes fade   { to { opacity: 1; } }
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(8px); }
}


/* 3. Cursor & Noise Overlay
   ------------------------------------------------------------ */
.cursor {
  width: 8px;
  height: 8px;
  background: var(--text-bright);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: difference;
  transition: transform 0.15s ease;
  display: none;
}
.cursor.hover { transform: scale(4); }

@media (hover: hover) and (pointer: fine) {
  .cursor { display: block; }
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}


/* 4. Navigation
   ------------------------------------------------------------ */
nav {
  position: absolute;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 28px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  mix-blend-mode: difference;
}

.logo { display: flex; align-items: center; line-height: 0; }
.logo img { height: 22px; width: auto; display: block; }

.nav-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  text-transform: uppercase;
}


/* 5. Hero
   ------------------------------------------------------------ */
.hero {
  height: 100vh;
  min-height: 600px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  padding: 0 24px;
  overflow: hidden;
}

.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.4;
  transform: perspective(500px) rotateX(60deg);
  transform-origin: center top;
  pointer-events: none;
}

.hero-meta {
  position: absolute;
  top: 50%;
  left: 32px;
  transform: translateY(-50%) rotate(-90deg);
  transform-origin: left center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
  white-space: nowrap;
  opacity: 0;
  animation: fade 1s 0.8s ease forwards;
}

.hero-text { text-align: center; position: relative; z-index: 2; }

.hero-word {
  font-size: clamp(64px, 14vw, 200px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.85;
  display: block;
  opacity: 0;
  transform: translateY(60px);
  animation: reveal 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.hero-word:nth-child(2) { animation-delay: 0.15s; }
.hero-word:nth-child(3) { animation-delay: 0.3s; }
.hero-word.dim { color: var(--text-dim); }

.hero-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--text-dim);
  margin-top: 48px;
  text-transform: uppercase;
  opacity: 0;
  animation: fade 1s 0.6s ease forwards;
}
.hero-sub .hero-emphasis { color: var(--text-bright); }

.hero-tagline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--text-dim);
  margin-top: 16px;
  text-transform: uppercase;
  opacity: 0;
  animation: fade 1s 0.85s ease forwards;
  text-align: center;
  position: relative;
}
.hero-tagline::before {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--deep);
  margin: 0 auto 16px;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
  opacity: 0;
  animation: fade 1s 1.2s ease forwards, bounce 2s 2s ease infinite;
}


/* 6. Section Defaults
   ------------------------------------------------------------ */
section {
  min-height: 100vh;
  padding: 120px 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.section-head { padding: 80px 32px 0; }

.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 48px;
}


/* 7. Privacy / The Filter
   ------------------------------------------------------------ */
.privacy { align-items: center; text-align: center; }

.privacy-visual {
  position: relative;
  width: min(380px, 80vw);
  height: min(380px, 80vw);
  margin-bottom: 64px;
  cursor: pointer;
}

.data-dot {
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--text-dim);
  border-radius: 50%;
  transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.privacy-visual:hover .data-dot,
.privacy-visual.active .data-dot {
  opacity: 0;
  transform: scale(0);
}

.privacy-visual:hover .data-dot.visible,
.privacy-visual.active .data-dot.visible {
  opacity: 1;
  transform: scale(1);
  background: var(--lavender);
  box-shadow: 0 0 20px var(--lavender), 0 0 40px var(--lavender-glow);
}

.privacy-center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 120px;
  height: 120px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.privacy-visual:hover .privacy-center,
.privacy-visual.active .privacy-center {
  border-color: var(--lavender);
  box-shadow: 0 0 60px var(--lavender-glow), 0 0 120px var(--glow);
}

.privacy-center span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  text-transform: uppercase;
  transition: color 0.3s ease;
}
.privacy-visual:hover .privacy-center span,
.privacy-visual.active .privacy-center span { color: var(--text-bright); }

.privacy-text {
  font-size: clamp(28px, 5vw, 56px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.1;
  max-width: 800px;
  margin: 0 auto;
}

.privacy-text .blur {
  filter: blur(8px);
  transition: filter 0.5s ease;
  cursor: pointer;
  display: inline-block;
}
.privacy-text .blur:hover,
.privacy-text .blur.active { filter: blur(0); }

.privacy-subtext {
  margin: 28px auto 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  letter-spacing: 1.5px;
  color: var(--text-mid);
  line-height: 1.6;
  max-width: 520px;
  text-align: center;
}
.privacy-subtext::before {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: var(--deep);
  margin: 0 auto 16px;
}

.privacy-hint {
  margin-top: 32px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  text-transform: uppercase;
}


/* 8. Token Demo
   ------------------------------------------------------------ */
.token-demo {
  margin: 80px auto 0;
  max-width: 720px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0;
  align-items: stretch;
  border: 1px solid var(--line);
  background: var(--surface);
}

.token-side { padding: 32px 28px; position: relative; overflow: hidden; }
.token-side.before { background: linear-gradient(180deg, rgba(212, 197, 176, 0.04) 0%, transparent 100%); }
.token-side.after  { background: linear-gradient(180deg, rgba(156, 175, 136, 0.04) 0%, transparent 100%); }

.token-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 20px;
}
.token-side.before .token-label { color: var(--sand); }
.token-side.after  .token-label { color: var(--sage); }

.token-data {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 2;
  color: var(--text-bright);
  text-align: left;
}
.token-data .redacted {
  color: var(--text-dim);
  text-decoration: line-through;
  text-decoration-color: var(--lavender-dim);
}

.token-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--lavender);
  text-transform: uppercase;
  background: var(--void);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  padding: 16px 4px;
}

.token-caption {
  margin-top: 24px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  text-transform: uppercase;
  text-align: center;
}
.token-caption .accent { color: var(--lavender); }


/* 9. Interface Panels
   ------------------------------------------------------------ */
.interface { padding: 0; min-height: 100vh; }

.interface-headline {
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: 24px;
  margin-top: 24px;
}
.interface-headline .dim { color: var(--text-dim); }

.interface-headline-desc {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-mid);
  max-width: 580px;
  margin-bottom: 48px;
}
.interface-headline-desc strong { color: var(--text-bright); font-weight: 500; }

.interface-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  flex: 1;
  min-height: 100vh;
}
.interface-grid-3 { grid-template-columns: 1fr 1fr 1fr; }

.interface-panel {
  background: var(--void);
  padding: 64px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
  cursor: pointer;
  min-height: 50vh;
  transition: background 0.4s ease;
}

.interface-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--glow) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}
.interface-panel:hover::before,
.interface-panel.active::before { opacity: 1; }

.interface-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 20px;
}

.interface-title {
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 16px;
}

.interface-desc {
  font-size: 15px;
  color: var(--text-mid);
  line-height: 1.6;
  max-width: 360px;
}

.interface-hidden {
  margin-top: 24px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.4s ease;
  letter-spacing: 0.5px;
}
.interface-panel:hover .interface-hidden,
.interface-panel.active .interface-hidden {
  opacity: 1;
  transform: translateY(0);
}

/* iQ panel — special */
.interface-panel.iq-panel { background: var(--surface); }
.interface-panel.iq-panel .interface-title { color: var(--text-bright); }
.interface-title-logo { font-size: 0; margin-bottom: 16px; }
.interface-title-logo img {
  height: clamp(32px, 5.5vw, 52px);
  width: auto;
  display: block;
}
.interface-panel.iq-panel::before {
  background: linear-gradient(135deg, var(--deep) 0%, transparent 70%);
  opacity: 0.4;
}
.interface-panel.iq-panel:hover::before,
.interface-panel.iq-panel.active::before { opacity: 0.7; }


/* 10. Pattern Rows & Trust Marker
   ------------------------------------------------------------ */
.pattern-rows {
  padding: 32px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

.pattern-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--text-mid);
  text-transform: uppercase;
}
.pattern-row:last-of-type { border-bottom: none; }
.pattern-row .left { text-align: left; }
.pattern-row .center {
  color: var(--text-bright);
  padding: 0 12px;
  border-left: 1px solid var(--line-strong);
  border-right: 1px solid var(--line-strong);
}
.pattern-row .right { text-align: right; }

.trust-marker {
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px dashed var(--line);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
  text-transform: uppercase;
  text-align: center;
  line-height: 1.8;
}
.trust-marker .label { color: var(--deep); margin-right: 8px; }


/* 11. Verticals
   ------------------------------------------------------------ */
.verticals { align-items: center; text-align: center; }

.verticals-words {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 64px;
}

.vertical-word {
  font-size: clamp(56px, 12vw, 160px);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 0.9;
  color: var(--text-bright);
  transition: color 0.4s ease, letter-spacing 0.4s ease;
  cursor: default;
}
.vertical-word:hover { color: var(--text-bright); }
.vertical-word.dim { color: var(--text-dim); }
.vertical-word.dim:hover { color: var(--text-bright); }

.verticals-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
  max-width: 540px;
  line-height: 2;
}
.verticals-meta .next-up {
  display: inline-block;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--lavender-dim);
  letter-spacing: 2.5px;
}


/* 12. Differenzierungen
   ------------------------------------------------------------ */
.differenzierungen { padding: 0; }

.diff-item {
  min-height: 60vh;
  display: flex;
  align-items: center;
  padding: 80px 32px;
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.diff-item:last-of-type { border-bottom: none; }

.diff-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--deep);
  position: absolute;
  top: 40px;
  left: 32px;
  text-transform: uppercase;
}

.diff-content {
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.diff-title {
  font-size: clamp(40px, 8vw, 88px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: 24px;
}
.diff-title .dim { color: var(--text-dim); }

.diff-desc {
  font-size: 17px;
  line-height: 1.7;
  color: var(--text-mid);
  max-width: 560px;
}
.diff-desc strong { color: var(--text-bright); font-weight: 500; }

.diff-stack {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 1.5px;
  color: var(--sand-dim);
  text-transform: uppercase;
  line-height: 1.8;
}

.diff-bg {
  position: absolute;
  right: -2%;
  top: 50%;
  transform: translateY(-50%);
  font-size: clamp(180px, 32vw, 360px);
  font-weight: 700;
  color: rgba(13, 59, 73, 0.18);
  pointer-events: none;
  letter-spacing: -0.05em;
  line-height: 1;
  user-select: none;
}


/* 13. Code Anchor
   ------------------------------------------------------------ */
.code-anchor {
  padding: 60px 32px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}
.code-anchor pre {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  line-height: 2.2;
  color: var(--text-dim);
  letter-spacing: 0.5px;
  display: inline-block;
  text-align: left;
  margin: 0;
}
.code-anchor .comment { color: var(--deep); }
.code-anchor .accent  { color: var(--text-bright); }


/* 14. Pathways
   ------------------------------------------------------------ */
.pathways { padding: 0; }

/* Heading: Block horizontal mittig, Text linksbündig */
.pathways-intro {
  padding: 80px 32px 0;
  max-width: 640px;
  margin: 0 auto;
  width: 100%;
  text-align: left;
}

.pathways-headline {
  font-family: 'Instrument Sans', sans-serif;
  font-size: clamp(40px, 8vw, 72px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: 48px;
}
.pathways-headline .dim { color: var(--text-dim); }

.pathways-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  min-height: 80vh;
}

.pathway {
  background: var(--void);
  padding: 80px 40px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.pathway::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--glow) 0%, var(--lavender-glow) 50%, transparent 70%);
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}
.pathway:hover::before { opacity: 0.6; }

.pathway-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 3px;
  color: var(--deep);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.pathway-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 20px;
}

.pathway-for {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--text-mid);
  text-transform: uppercase;
  margin-bottom: 32px;
  line-height: 1.7;
}

.pathway-block { margin-bottom: 24px; }
.pathway-block-label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.pathway-block-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-mid);
}
.pathway-block-text strong { color: var(--text-bright); font-weight: 500; }


/* 15. Contact / Form
   ------------------------------------------------------------ */
.contact { padding: 120px 32px 80px; min-height: auto; }

.contact-inner { max-width: 640px; margin: 0 auto; width: 100%; }

.contact-headline {
  font-size: clamp(44px, 8vw, 88px);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: 24px;
}
.contact-headline .dim { color: var(--text-dim); }

.contact-sub {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 64px;
}

form { display: block; }

.field { margin-bottom: 32px; }

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

.field label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.field label .opt {
  color: rgba(255,255,255,0.18);
  font-weight: 300;
}

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
textarea {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line-strong);
  padding: 12px 0;
  color: var(--text-bright);
  font-family: 'Instrument Sans', sans-serif;
  font-size: 18px;
  transition: border-color 0.3s ease;
  -webkit-appearance: none;
  appearance: none;
  border-radius: 0;
}
input::placeholder, textarea::placeholder { color: rgba(255,255,255,0.2); }
input:focus, textarea:focus {
  outline: none;
  border-bottom-color: var(--text-bright);
}
textarea {
  resize: none;
  min-height: 60px;
  font-family: 'Instrument Sans', sans-serif;
}

/* Segments — text-style buttons */
.segments { display: flex; flex-wrap: wrap; gap: 0; }
.segment {
  cursor: pointer;
  user-select: none;
  padding: 10px 0;
  margin-right: 32px;
  margin-bottom: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  text-transform: uppercase;
  transition: color 0.3s ease;
  position: relative;
  border: none;
  background: transparent;
}
.segment input { display: none; }
.segment::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 100%;
  height: 1px;
  background: var(--text-bright);
  transition: right 0.3s ease;
}
.segment:hover { color: var(--text-mid); }
.segment:hover::after { right: 50%; }
.segment.selected { color: var(--text-bright); }
.segment.selected::after { right: 0; }

/* Optional toggle */
.optional-toggle {
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  cursor: pointer;
  padding: 16px 0;
  margin: 16px 0 8px;
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
  gap: 12px;
}
.optional-toggle:hover { color: var(--text-bright); }
.optional-toggle .plus { font-size: 14px; transition: transform 0.3s ease; }
.optional-toggle.open .plus { transform: rotate(45deg); }

.optional-fields {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.optional-fields.open { max-height: 600px; }

.field-hint {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 8px;
  font-style: italic;
}


/* 16. Submit Button & Privacy Note
   ------------------------------------------------------------ */
.submit-btn {
  margin-top: 48px;
  background: var(--deep);
  color: var(--text-bright);
  border: none;
  padding: 22px 40px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  position: relative;
  overflow: hidden;
}
.submit-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--lavender);
  transform: translateX(-101%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.submit-btn:hover:not(:disabled)::before { transform: translateX(0); }
.submit-btn span {
  position: relative;
  z-index: 1;
  transition: color 0.3s ease;
}
.submit-btn:hover:not(:disabled) span { color: var(--void); }
.submit-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.privacy-note {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
}
.privacy-note .label {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 3px;
  color: var(--deep);
  text-transform: uppercase;
  margin-bottom: 16px;
  opacity: 0.9;
}
.privacy-note p {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.5px;
  color: var(--text-mid);
  line-height: 1.9;
}
.privacy-note .flow {
  display: block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 1.5px;
  color: var(--text-dim);
  text-transform: uppercase;
  line-height: 2;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px dashed var(--line);
}
.privacy-note .flow .arrow { color: var(--text-bright); margin: 0 6px; }
.privacy-note .flow .dim { color: rgba(255,255,255,0.18); }


/* 17. Success State
   ------------------------------------------------------------ */
.success-state {
  display: none;
  padding: 60px 0;
  text-align: center;
}
.success-state.shown {
  display: block;
  animation: reveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
.success-mark {
  font-family: 'Instrument Sans', sans-serif;
  font-size: 80px;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--text-bright);
  margin-bottom: 24px;
  line-height: 1;
}
.success-mark .dim { color: var(--text-dim); }
.success-text {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--text-mid);
  text-transform: uppercase;
  line-height: 2;
}
.success-text a {
  color: var(--text-bright);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: border-color 0.3s ease;
}
.success-text a:hover { border-color: var(--text-bright); }


/* 18. End Section
   ------------------------------------------------------------ */
.end {
  min-height: 60vh;
  padding: 80px 32px 60px;
  align-items: center;
  text-align: center;
}
.end-logo { line-height: 0; margin-bottom: 32px; }
.end-logo img {
  height: clamp(56px, 11vw, 120px);
  width: auto;
  margin: 0 auto;
  display: block;
}
.end-tagline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 4px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.end-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.18);
  text-transform: uppercase;
}
.end-meta .sachsen { color: var(--sage-dim); }
.end-meta .omr { color: var(--lavender-dim); }


/* 19. Responsive (Mobile)
   ------------------------------------------------------------ */
@media (max-width: 768px) {
  nav { padding: 20px; }
  section { padding: 80px 20px; }

  .interface-grid { grid-template-columns: 1fr; }
  .interface-grid-3 { grid-template-columns: 1fr; }
  .interface-panel { min-height: 40vh; padding: 48px 24px; }

  .token-demo { grid-template-columns: 1fr; }
  .token-arrow {
    writing-mode: horizontal-tb;
    transform: none;
    border-left: none;
    border-right: none;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 12px 0;
  }

  .field-row { grid-template-columns: 1fr; gap: 0; }
  .field-row > div { margin-bottom: 32px; }

  .hero-meta { display: none; }
  .contact { padding: 80px 20px 60px; }

  .pattern-rows { padding: 24px 20px; }
  .pattern-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 14px 0;
    text-align: left;
  }
  .pattern-row .center,
  .pattern-row .right { text-align: left; padding: 0; border: none; }
  .pattern-row .center::before { content: '↓ '; }
  .pattern-row .right::before  { content: '↓ '; }

  .diff-item { padding: 60px 20px; min-height: auto; }
  .diff-num { left: 20px; top: 24px; }
  .diff-bg { display: none; }

  .pathways-intro { padding: 60px 20px 0; }
  .pathways-grid { grid-template-columns: 1fr; min-height: auto; }
  .pathway { padding: 60px 24px; }

  .code-anchor { padding: 40px 20px; }
  .code-anchor pre { font-size: 11px; }
}


/* 20. Reduced Motion
   ------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}