:root{
  --paper: #F6F5F0;
  --paper-dim: #EEEDE5;
  --ink: #1B1B18;
  --ink-soft: #5B594F;
  --ink-faint: #8B8977;
  --survey-blue: #2B4570;
  --accent: #197180;
  --on-accent: #FFFFFF;
  --line: #D9D6C9;
  --line-strong: #C4C1B2;

  --font-display: -apple-system, "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Roboto Mono", "IBM Plex Mono", Consolas, monospace;

  --header-h: 64px;
  --max: 1180px;
}

@media (prefers-color-scheme: dark){
  :root{
    --paper: #17181A;
    --paper-dim: #1E2023;
    --ink: #ECEBE4;
    --ink-soft: #B3B0A2;
    --ink-faint: #77756A;
    --survey-blue: #7C9CC9;
    --accent: #5ECDDF;
    --on-accent: #14181A;
    --line: #34363A;
    --line-strong: #43464B;
  }
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg{ max-width: 100%; display: block; }
a{ color: inherit; }
h1,h2,h3,p,ul{ margin: 0; }

:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

::selection{ background: var(--accent); color: var(--on-accent); }

/* ---------- background plan-grid ---------- */
.grid-bg{
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .35;
  mask-image: linear-gradient(to bottom, black, black 60%, transparent 100%);
}

/* ---------- layout helpers ---------- */
.wrap{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}
.eyebrow{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
}
.section-label{
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.section-head{ margin-bottom: 34px; max-width: 60ch; }
.section-head h2{
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  letter-spacing: -.01em;
  margin-top: 10px;
}
.section-head p{
  color: var(--ink-soft);
  margin-top: 12px;
  font-size: 15.5px;
}

/* ---------- reveal-on-scroll ---------- */
.reveal{
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.is-visible{ opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .reveal{ opacity: 1 !important; transform: none !important; transition: none !important; }
  .parcel-outline, .parcel-fade, .crosshair, .readout li{ animation: none !important; opacity: 1 !important; stroke-dashoffset: 0 !important; transform: none !important; }
}

/* ================= HEADER ================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap{
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.wordmark{
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.wordmark img{
  display: block;
  height: 22px;
  width: auto;
}
.site-nav{
  display: flex;
  align-items: center;
  gap: 28px;
}
.site-nav a:not(.btn){
  font-size: 14px;
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
}
.site-nav a:not(.btn):hover{ color: var(--ink); border-color: var(--line-strong); }

.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 11px 18px;
  border: 1px solid currentColor;
  border-radius: 1px;
  white-space: nowrap;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}
.btn-primary{
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}
.btn-primary:hover{ background: color-mix(in srgb, var(--accent) 85%, black); }

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--line-strong);
  border-radius: 1px;
  background: none;
  padding: 0;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  flex-shrink: 0;
}
.nav-toggle span{
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--ink);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform: translateY(-6.5px) rotate(-45deg); }

.mobile-nav{
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  flex-direction: column;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  padding: 4px 28px 12px;
}
.mobile-nav a{
  font-size: 15px;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}
.mobile-nav a:last-child{ border-bottom: none; }
.site-header.nav-open .mobile-nav{ display: flex; }

@media (max-width: 720px){
  .site-nav a:not(.btn){ display: none; }
  .nav-toggle{ display: flex; }
}

/* ================= HERO ================= */
.hero{
  padding: 88px 0 72px;
}
.hero .wrap{
  display: grid;
  grid-template-columns: minmax(0,1.05fr) minmax(0,1fr);
  gap: 56px;
  align-items: center;
}
.hero h1{
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  line-height: 1.04;
  font-size: clamp(34px, 4.4vw, 54px);
  margin: 14px 0 22px;
}
.hero-sub{
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 46ch;
  margin-bottom: 34px;
}
.hero-actions{
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}
.link-quiet{
  font-size: 14px;
  text-decoration: none;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-strong);
}
.link-quiet:hover{ color: var(--ink); }

.diagram-frame{
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 60%, var(--paper-dim));
  padding: 22px 22px 0;
  position: relative;
}
.diagram-frame::before{
  content: "BEISPIEL-AUSWERTUNG";
  position: absolute;
  top: -11px;
  left: 20px;
  background: var(--paper);
  padding: 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--ink-faint);
}
.coord{
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--ink-faint);
  letter-spacing: .02em;
}
.dim-label{
  font-family: var(--font-mono);
  font-size: 11px;
  fill: var(--survey-blue);
}
.parcel-outline{
  fill: color-mix(in srgb, var(--survey-blue) 6%, transparent);
  stroke: var(--ink);
  stroke-width: 1.6;
  stroke-linejoin: round;
  stroke-dasharray: 1500;
  stroke-dashoffset: 1500;
  animation: draw 1.6s cubic-bezier(.3,.7,.2,1) .1s forwards;
}
.dim-line{ stroke: var(--survey-blue); stroke-width: 1; }
.parcel-fade{
  opacity: 0;
  animation: fade-up .7s ease .9s forwards;
}
.crosshair{
  opacity: 0;
  transform-origin: 206px 176px;
  animation: pop-in .5s ease 1.5s forwards;
}
@keyframes draw{ to{ stroke-dashoffset: 0; } }
@keyframes fade-up{ from{ opacity:0; transform: translateY(6px);} to{ opacity:1; transform: translateY(0);} }
@keyframes pop-in{ from{ opacity:0; transform: scale(.4);} to{ opacity:1; transform: scale(1);} }

.readout{
  list-style: none;
  padding: 16px 4px 20px;
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  border-top: 1px solid var(--line);
}
.readout li{
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px dotted var(--line-strong);
  opacity: 0;
  transform: translateY(6px);
  animation: fade-up .5s ease forwards;
}
.readout li:last-child{ border-bottom: none; }
.readout li span:first-child{ color: var(--ink-faint); letter-spacing: .04em; }
.readout li span:last-child{ color: var(--ink); font-weight: 600; }
.readout li:nth-child(1){ animation-delay: 1.7s; }
.readout li:nth-child(2){ animation-delay: 1.82s; }
.readout li:nth-child(3){ animation-delay: 1.94s; }
.readout li:nth-child(4){ animation-delay: 2.06s; }
.readout li:nth-child(5){ animation-delay: 2.18s; }

@media (max-width: 880px){
  .hero .wrap{ grid-template-columns: 1fr; }
}

/* ================= TRUST STRIP ================= */
.trust{
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 22px 0;
}
.trust .wrap{
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
}
.trust-label{
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  white-space: nowrap;
}
.trust-badges{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.trust-badge{
  font-family: var(--font-mono);
  font-size: 12.5px;
  border: 1px solid var(--line-strong);
  padding: 6px 12px;
  color: var(--ink-soft);
}
.trust-badge b{ color: var(--ink); font-weight: 700; }

/* ================= VALUE / AUDIENCE GRIDS ================= */
.section{ padding: 64px 0; }
.section-alt{ background: var(--paper-dim); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.card-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.card-grid.cols-3{ grid-template-columns: repeat(3, 1fr); }

.value-card, .audience-card{
  padding: 0 22px 0 0;
  border-left: 1px solid var(--line);
  padding-left: 22px;
}
.value-card:first-child, .audience-card:first-child{ border-left: none; padding-left: 0; }

.value-card .rev, .audience-card .rev{
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--accent);
  border: 1px solid var(--accent);
  display: inline-block;
  padding: 2px 7px;
  margin-bottom: 14px;
}
.value-card h3, .audience-card h3{
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.value-card p, .audience-card p{
  font-size: 14.5px;
  color: var(--ink-soft);
}

@media (max-width: 880px){
  .card-grid, .card-grid.cols-3{ grid-template-columns: 1fr 1fr; row-gap: 32px; }
  .card-grid .value-card:nth-child(3), .card-grid .audience-card:nth-child(3){ border-left: none; padding-left: 0; }
}
@media (max-width: 560px){
  .card-grid, .card-grid.cols-3{ grid-template-columns: 1fr; }
  .value-card, .audience-card{ border-left: none; padding-left: 0; }
}

/* ================= FORMULAR ================= */
.formular{ padding: 64px 0 80px; }
.formular .wrap{
  display: grid;
  grid-template-columns: minmax(0,1.05fr) minmax(0,1fr);
  gap: 56px;
  align-items: center;
}
.formular h2{
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 30px);
  font-weight: 800;
  letter-spacing: -.01em;
  margin-bottom: 14px;
}
.formular-lead{ color: var(--ink-soft); max-width: 52ch; margin-bottom: 28px; }
@media (max-width: 880px){
  .formular .wrap{ grid-template-columns: 1fr; }
}
.whitepaper-frame{
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper) 60%, var(--paper-dim));
  padding: 26px;
  position: relative;
}
.whitepaper-frame::before{
  content: "WHITEPAPER — VORSCHAU";
  position: absolute;
  top: -11px;
  left: 20px;
  background: var(--paper);
  padding: 0 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .08em;
  color: var(--ink-faint);
}
.sr-only{
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.whitepaper-form{
  display: flex;
  gap: 12px;
  max-width: 480px;
}
.whitepaper-form input{
  flex: 1;
  min-width: 0;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--ink);
  background: var(--paper-dim);
  border: 1px solid var(--line-strong);
  border-radius: 1px;
  padding: 0 14px;
}
.whitepaper-form input::placeholder{ color: var(--ink-faint); }
.whitepaper-form input:focus-visible{ outline-offset: 0; }
.whitepaper-form .btn{ flex-shrink: 0; }
.whitepaper-note{
  font-size: 12.5px;
  color: var(--ink-faint);
  margin-top: 12px;
}
.todo-tag{
  display: inline-block;
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-faint);
  border: 1px dashed var(--line-strong);
  padding: 2px 6px;
}
@media (max-width: 520px){
  .todo-tag{ display: inline-block; margin: 8px 0 0; }
  .whitepaper-form{ flex-direction: column; max-width: 360px; }
  .whitepaper-form input{ padding: 11px 14px; }
}

/* ================= FOOTER ================= */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 32px 0 44px;
}
.site-footer .wrap{
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px 32px;
  align-items: center;
}
.site-footer p{
  font-size: 13px;
  color: var(--ink-faint);
}
.site-footer .wordmark img{ height: 18px; }
.footer-legal{
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-legal a{
  font-size: 13px;
  text-decoration: none;
  color: var(--ink-faint);
  border-bottom: 1px solid transparent;
}
.footer-legal a:hover{ color: var(--ink); border-color: var(--line-strong); }

/* ================= LEGAL PAGES ================= */
.legal{ padding: 56px 0 90px; }
.legal .wrap{ max-width: 760px; margin: 0 auto; }
.legal-back{
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--ink-faint);
  text-decoration: none;
  margin-bottom: 24px;
}
.legal-back:hover{ color: var(--ink); }
.legal h1{
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 800;
  letter-spacing: -.01em;
  margin-bottom: 8px;
}
.legal .legal-updated{
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-faint);
  margin-bottom: 40px;
}
.legal h2{
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 12px;
}
.legal p{
  color: var(--ink-soft);
  margin-bottom: 14px;
  max-width: 68ch;
}
.legal ul{
  color: var(--ink-soft);
  padding-left: 20px;
  margin-bottom: 14px;
  max-width: 68ch;
}
.legal li{ margin-bottom: 6px; }
.legal .todo-note{
  border: 1px dashed var(--line-strong);
  background: var(--paper-dim);
  padding: 16px 20px;
  margin-bottom: 36px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-faint);
  max-width: 68ch;
}
.legal .todo-note b{ color: var(--ink); }
.legal [data-todo]{
  background: color-mix(in srgb, var(--accent) 16%, transparent);
  padding: 0 4px;
  border-radius: 2px;
}