/* ============================================================
   traktio — style.css
   Design: takt. (werk. + strom.) — freigegeben 2026-07-14
   Ruhezustand: Ingenieurs-Papier (Zellen, Raster, Mono-Labels).
   Aktiver Zustand: Petrol-Mint-Energie (Invert, Puls, Taktspur).
   Kein Framework, keine Abhängigkeiten.
   ============================================================ */

/* ---------- design tokens ---------- */
:root {
  --papier:     #F2F1EA;  /* grundton: ingenieurs-papier */
  --karton:     #E9E7DC;  /* flächen / felder */
  --blatt:      #FCFBF7;  /* eingabefelder: helles blatt */
  --tiefe:      #0C2B25;  /* tinte, text, invert-grund (tiefsee-petrol) */
  --strom:      #0E8C68;  /* energie auf hellem grund: grafik, linien, akzente */
  --strom-tief: #0A6B50;  /* energie als text/CTA: dunklere stufe, WCAG-AA-sicher */
  --mint:       #4FE3AC;  /* energie auf dunklem grund: puls, trail, invert-akzent */
  --graph:      #D8D6C8;  /* millimeter-raster, rahmen */
  --grau:       #5F6B60;  /* text sekundär auf papier */
  --nebel:      #9DB4AB;  /* text sekundär auf invert */
  --sand:       #EDE9DC;  /* text auf invert */
  --fehler:     #9B2C1B;  /* formular-fehler */
  --font-display: 'Space Grotesk', 'Avenir Next', 'Segoe UI', sans-serif;
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:    'IBM Plex Mono', 'SF Mono', 'Consolas', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--papier);
  color: var(--tiefe);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  /* millimeterpapier-textur (werk) */
  background-image:
    linear-gradient(var(--graph) 1px, transparent 1px),
    linear-gradient(90deg, var(--graph) 1px, transparent 1px);
  background-size: 48px 48px;
  background-position: center top;
}

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

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

.mono {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: lowercase;
}

/* sticky nav: anker landen nicht unter der leiste */
section[id], [id] { scroll-margin-top: 76px; }

/* ---------- accessibility ---------- */
.skip-link {
  position: absolute;
  top: -100px; left: 16px;
  z-index: 100;
  background: var(--tiefe);
  color: var(--mint);
  padding: 10px 18px;
  font-family: var(--font-display);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 2px solid var(--strom-tief);
  outline-offset: 2px;
}
.station:hover :focus-visible,
.cell:hover :focus-visible,
.nav-links a:focus-visible,
.btn-primary:focus-visible {
  outline-color: var(--tiefe);
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- passkreuz-marker (werk) ---------- */
.cross { position: relative; }
.cross::before, .cross::after {
  position: absolute;
  font-family: var(--font-mono);
  color: var(--tiefe);
  font-size: .9rem;
  line-height: 1;
  z-index: 2;
  pointer-events: none;
}
.cross::before { content: "+"; top: -7px; left: -5px; }
.cross::after  { content: "+"; bottom: -8px; right: -5px; }

/* ---------- taktspur: cursor-trail canvas ---------- */
#taktspur {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 60;
  mix-blend-mode: multiply; /* wirkt wie geplottete tinte, überstrahlt nie den text */
}
/* touch-fallback + reduced motion: trail komplett aus */
@media (hover: none), (pointer: coarse), (prefers-reduced-motion: reduce) {
  #taktspur { display: none; }
}

/* ---------- nav ---------- */
.site-head {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--papier);
  border-bottom: 1px solid var(--tiefe);
}
.nav-inner {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  max-width: 1160px;
  margin: 0 auto;
}
.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--tiefe);
  text-decoration: none;
  letter-spacing: -.02em;
  padding: 16px 24px;
  border-right: 1px solid var(--tiefe);
  display: flex;
  align-items: center;
}
.wordmark em { font-style: normal; color: var(--strom); }
.nav-links { display: flex; align-items: stretch; }
.nav-links a {
  display: flex;
  align-items: center;
  padding: 0 22px;
  color: var(--tiefe);
  text-decoration: none;
  font-size: .88rem;
  border-left: 1px solid var(--tiefe);
  transition: background .15s, color .15s;
}
.nav-links a:hover { background: var(--tiefe); color: var(--mint); }
.nav-links a.cta {
  background: var(--strom-tief);
  color: var(--papier);
  font-weight: 600;
}
.nav-links a.cta:hover { background: var(--tiefe); color: var(--mint); }

/* ---------- hero ---------- */
.hero { padding: 72px 0 0; }
.hero-frame {
  border: 1px solid var(--tiefe);
  background: var(--papier);
  padding: 64px 48px 56px;
  position: relative;
  overflow: hidden;
}
.hero-frame .ref {
  position: absolute;
  top: 12px; right: 16px;
  color: var(--grau);
  z-index: 1;
}
.hero-frame .ref b { color: var(--strom-tief); font-weight: 500; }
.hero-net {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 46%;
  pointer-events: none;
  opacity: .85;
}
.hero-net svg { width: 100%; height: 100%; }
.hero-inner { position: relative; z-index: 1; }
.kicker {
  display: inline-block;
  border: 1px solid var(--tiefe);
  padding: 5px 12px;
  margin-bottom: 32px;
  background: var(--karton);
}
h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.5rem, 7vw, 5rem);
  line-height: 1.02;
  letter-spacing: -.03em;
  max-width: 14ch;
}
h1 .sig { color: var(--strom-tief); }
.hero p.sub {
  margin: 28px 0 40px;
  max-width: 50ch;
  color: var(--grau);
  font-size: 1.1rem;
}
.hero-ctas { display: flex; gap: 0; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: .95rem;
  padding: 16px 28px;
  border: 1px solid var(--tiefe);
  transition: background .15s, color .15s, border-color .15s;
  font-family: var(--font-display);
  cursor: pointer;
  background: var(--papier);
  color: var(--tiefe);
}
.btn-primary {
  background: var(--strom-tief);
  color: var(--papier);
  border-color: var(--strom-tief);
}
.btn-primary:hover {
  background: var(--tiefe);
  border-color: var(--tiefe);
  color: var(--mint);
}
.btn-ghost { border-left: none; }
.btn-ghost:hover { background: var(--karton); }

/* maßlinie unter dem hero (werk): der claim als bemaßung */
.dimension {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  color: var(--grau);
}
.dimension .line {
  flex: 1;
  height: 1px;
  background: var(--tiefe);
  position: relative;
}
.dimension .line::before,
.dimension .line::after {
  content: "";
  position: absolute;
  top: -4px;
  width: 1px;
  height: 9px;
  background: var(--tiefe);
}
.dimension .line::before { left: 0; }
.dimension .line::after  { right: 0; }

/* ---------- sections ---------- */
section { padding: 72px 0; }
h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  letter-spacing: -.02em;
  line-height: 1.1;
}
.sec-label {
  display: inline-block;
  background: var(--tiefe);
  color: var(--mint);
  padding: 5px 12px;
  margin-bottom: 20px;
}
.sec-sub { color: var(--grau); max-width: 56ch; margin: 16px 0 48px; }
h2 + .cells { margin-top: 48px; }

/* hover-aufforderung: nur auf geräten mit maus einblenden */
.hover-hint { display: none; }
@media (hover: hover) and (pointer: fine) {
  .hover-hint { display: inline; }
}

/* lead-text (haltung) */
.lead {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.25rem, 2.4vw, 1.7rem);
  line-height: 1.35;
  letter-spacing: -.01em;
  max-width: 46ch;
  margin: 0 0 48px;
}

/* ---------- zellen-grid mit invert + strompfad ---------- */
.cells {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--tiefe);
  background: var(--tiefe);
  gap: 1px;
}
.cells--4 { grid-template-columns: repeat(4, 1fr); }
.cell {
  background: var(--papier);
  padding: 36px 30px;
  text-decoration: none;
  color: var(--tiefe);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: background .15s, color .15s;
  position: relative;
  overflow: hidden;
}
.cell .idx {
  color: var(--grau);
  display: flex;
  justify-content: space-between;
  transition: color .15s;
}
.cell h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.3rem;
  letter-spacing: -.01em;
}
.cell p {
  font-size: .92rem;
  color: var(--grau);
  flex: 1;
  transition: color .15s;
}
/* mint-strompfad läuft beim invert durch die zelle (strom) */
.cell::after {
  content: "";
  position: absolute;
  top: 0; left: -80%;
  width: 60%; height: 100%;
  background: linear-gradient(100deg, transparent, rgba(79, 227, 172, .14), transparent);
  transition: left .5s ease;
  pointer-events: none;
}
.cell:hover { background: var(--tiefe); color: var(--sand); }
.cell:hover::after { left: 120%; }
.cell:hover .idx { color: var(--mint); }
.cell:hover p { color: var(--nebel); }

/* ---------- taktstrecke: schaltplan + puls ---------- */
.plan { border: 1px solid var(--tiefe); background: var(--papier); }
.plan-head {
  border-bottom: 1px solid var(--tiefe);
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--grau);
}
.plan-body {
  display: grid;
  grid-template-columns: 1fr 64px 1fr 64px 1fr;
}
.station {
  padding: 40px 28px 32px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: background .15s, color .15s;
}
.station .mono { color: var(--strom-tief); transition: color .15s; }
.station h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: -.01em;
}
.station .promise {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.02rem;
}
.station p {
  font-size: .92rem;
  color: var(--grau);
  transition: color .15s;
}
.station ul {
  list-style: none;
  margin: 6px 0 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.station ul li {
  font-size: .85rem;
  color: var(--grau);
  padding-left: 18px;
  position: relative;
  transition: color .15s;
}
.station ul li::before {
  content: "+";
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  color: var(--strom-tief);
  transition: color .15s;
}
.station .detail {
  display: block;
  color: var(--grau);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .2s, transform .2s;
}
.station .station-cta {
  margin-top: auto;
  padding-top: 14px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .92rem;
  color: var(--strom-tief);
  text-decoration: none;
  transition: color .15s;
}
.station .station-cta .arrow { display: inline-block; transition: transform .2s; }
.station .station-cta:hover .arrow { transform: translateX(5px); }
/* invert in die strom-welt (synthese-kern) */
.station:hover { background: var(--tiefe); color: var(--sand); }
.station:hover .mono { color: var(--mint); }
.station:hover p, .station:hover ul li { color: var(--nebel); }
.station:hover ul li::before { color: var(--mint); }
.station:hover .detail { opacity: 1; transform: none; color: var(--mint); }
.station:hover .station-cta { color: var(--mint); }
/* touch: hover-details sind dort immer sichtbar */
@media (hover: none) {
  .station .detail { opacity: 1; transform: none; }
}
/* puls-node an der stationskante (strom) */
.station::after {
  content: "";
  position: absolute;
  top: 16px; left: 16px;
  width: 8px; height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--strom);
  background: var(--papier);
  transition: background .15s, border-color .15s;
}
.station:hover::after {
  background: var(--mint);
  border-color: var(--mint);
  animation: puls 1.4s ease infinite;
}
@keyframes puls {
  0%, 100% { box-shadow: 0 0 4px rgba(79, 227, 172, .5); }
  50%      { box-shadow: 0 0 16px rgba(79, 227, 172, .95); }
}

/* verbindungsleitung mit takt-puls und übergangs-label */
.connector {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.connector::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 1px;
  background: var(--tiefe);
}
/* der takt: energie läuft durch die leitung (strom) */
.connector .pulse {
  position: absolute;
  top: 50%; left: 0;
  width: 22px; height: 3px;
  margin-top: -1.5px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--strom), transparent);
  animation: taktH 2.4s linear infinite;
}
.connector--2 .pulse { animation-delay: 1.2s; }
@keyframes taktH {
  from { transform: translateX(-24px); }
  to   { transform: translateX(66px); }
}
/* übergangs-label: bemaßung an der leitung, vertikal wie im plan */
.connector .trans {
  position: relative;
  z-index: 1;
  writing-mode: vertical-rl;
  background: var(--papier);
  padding: 12px 3px;
  color: var(--grau);
  text-align: center;
  max-height: 100%;
}

/* ---------- über traktio ---------- */
.about-frame {
  border: 1px solid var(--tiefe);
  background: var(--papier);
  padding: 56px 48px 20px;
}
.about-frame h2 { max-width: 22ch; }
.about-frame .about-text {
  margin: 24px 0 40px;
  max-width: 62ch;
  color: var(--grau);
}
.about-frame .anker {
  display: block;
  border-top: 1px solid var(--graph);
  padding: 14px 0;
  color: var(--grau);
}

/* ---------- kontakt / funnel ---------- */
.kontakt-frame { position: relative; }
.kontakt-glow {
  position: absolute;
  bottom: -180px; left: 50%;
  transform: translateX(-50%);
  width: 520px; height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14, 140, 104, .12), transparent 65%);
  pointer-events: none;
}
.kontakt-anker { display: block; margin-top: 20px; color: var(--grau); font-size: .9rem; }

.contact-form {
  border: 1px solid var(--tiefe);
  background: var(--papier);
  position: relative;
  z-index: 1;
}
.form-head {
  border-bottom: 1px solid var(--tiefe);
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--grau);
}
.form-intro {
  padding: 24px 32px 0;
  color: var(--grau);
  font-size: .95rem;
  max-width: 62ch;
}

/* fortschritt */
.form-progress {
  height: 3px;
  background: var(--karton);
  margin: 24px 32px 0;
  display: none; /* erst mit JS sinnvoll */
}
.js .form-progress { display: block; }
.form-progress__bar {
  height: 100%;
  width: 25%;
  background: var(--strom);
  transition: width .3s ease;
}
.form-step-indicator {
  padding: 10px 32px 0;
  color: var(--grau);
  display: none;
}
.js .form-step-indicator { display: block; }

/* steps */
.form-step {
  border: none;
  padding: 24px 32px 8px;
}
.js .form-step--hidden { display: none; }
.form-step__legend {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  padding: 14px 0 4px;
}

.form-group { margin-bottom: 26px; }
.form-label {
  display: block;
  font-weight: 500;
  font-size: .95rem;
  margin-bottom: 10px;
}
.form-label--question { max-width: 62ch; }
.form-question-number {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--strom-tief);
  display: block;
  margin-bottom: 4px;
}
.form-required { color: var(--strom-tief); }
.form-optional { color: var(--grau); font-weight: 400; font-size: .85rem; }

.form-input, .form-textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--tiefe);
  background: var(--blatt);
  color: var(--tiefe);
  font-family: var(--font-body);
  font-size: .95rem;
  border-radius: 0;
}
.form-textarea { resize: vertical; min-height: 90px; }
.form-input:focus, .form-textarea:focus {
  outline: 2px solid var(--strom-tief);
  outline-offset: -1px;
}
.form-input[aria-invalid="true"], .form-textarea[aria-invalid="true"] {
  border-color: var(--fehler);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--grau); opacity: .8; }

/* radio-gruppen als plan-zellen */
.form-group--radio { border: none; }
.form-group--radio legend { padding: 0; }
.form-radio-group { display: flex; flex-direction: column; gap: 8px; }
.form-radio-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border: 1px solid var(--graph);
  background: var(--blatt);
  padding: 12px 14px;
  font-size: .92rem;
  cursor: pointer;
  transition: border-color .15s, background .15s;
}
.form-radio-label:hover { border-color: var(--strom-tief); }
.form-radio-label:has(.form-radio:checked) {
  border-color: var(--strom-tief);
  background: var(--karton);
}
.form-radio {
  accent-color: var(--strom-tief);
  margin-top: 3px;
  flex-shrink: 0;
}
.form-radio-label--other { flex-wrap: wrap; }
.form-input--inline {
  flex: 1;
  min-width: 160px;
  padding: 6px 10px;
  font-size: .88rem;
}
.form-input--inline:disabled { background: var(--karton); opacity: .7; }

.form-group--inline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* fehler */
.field-error {
  display: block;
  font-size: .8125rem;
  color: var(--fehler);
  margin-top: 6px;
  font-family: var(--font-mono);
}

/* submit */
.form-submit { padding: 6px 0 18px; }
.btn--large { font-size: 1.05rem; padding: 18px 34px; }
.form-submit-note { margin-top: 14px; color: var(--grau); font-size: .9rem; max-width: 52ch; }
.form-privacy {
  margin-top: 10px;
  color: var(--grau);
  font-size: .8rem;
  max-width: 62ch;
}
.form-privacy a { color: var(--strom-tief); }

/* step-navigation */
.form-nav {
  display: none;
  justify-content: space-between;
  gap: 12px;
  padding: 0 32px 28px;
}
.js .form-nav { display: flex; }
.form-nav .btn { border-left: 1px solid var(--tiefe); }
.form-nav__next { margin-left: auto; }

/* meldungen */
.form-message {
  margin: 0 32px 28px;
  padding: 18px 20px;
  border: 1px solid var(--tiefe);
  font-size: .95rem;
}
.form-message[hidden] { display: none; }
.form-message--success {
  background: var(--tiefe);
  color: var(--sand);
}
.form-message--success strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--mint);
  margin-bottom: 8px;
}
.form-message--error {
  background: var(--blatt);
  border-color: var(--fehler);
  color: var(--fehler);
}

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--tiefe);
  background: var(--papier);
}
.foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  padding: 28px 24px;
  max-width: 1160px;
  margin: 0 auto;
}
.foot .wordmark { border: none; padding: 0; }
.foot a {
  color: var(--tiefe);
  text-decoration: none;
  font-size: .85rem;
  border-bottom: 1px solid transparent;
  transition: border-color .15s, color .15s;
}
.foot a:hover { color: var(--strom-tief); border-color: var(--strom-tief); }
.foot .links { display: flex; gap: 24px; }
.foot .claim { color: var(--grau); }

/* ============================================================
   legal pages (impressum / datenschutz) — reduziertes takt.-layout
   ============================================================ */
.legal { max-width: 760px; margin: 0 auto; padding: 56px 24px 80px; }
.legal h1 {
  font-size: clamp(2rem, 5vw, 2.6rem);
  max-width: none;
}
.legal .meta {
  color: var(--grau);
  margin: 12px 0 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--tiefe);
}
.legal h2 {
  font-size: 1.3rem;
  margin: 2.4rem 0 .8rem;
}
.legal h3 {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 600;
  margin: 1.6rem 0 .5rem;
}
.legal p { margin-bottom: 1rem; }
.legal ul { margin: .5rem 0 1rem 1.25rem; }
.legal ul li { margin-bottom: .375rem; }
.legal a { color: var(--strom-tief); }
.legal table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: .88rem;
  border: 1px solid var(--tiefe);
  background: var(--blatt);
}
.legal th {
  text-align: left;
  padding: .55rem .75rem;
  background: var(--tiefe);
  color: var(--sand);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: lowercase;
}
.legal td {
  padding: .55rem .75rem;
  border-bottom: 1px solid var(--graph);
  vertical-align: top;
}
.legal .notice {
  background: var(--karton);
  border: 1px solid var(--tiefe);
  border-left: 4px solid var(--strom);
  padding: 1rem 1.25rem;
  font-size: .875rem;
  margin: 2rem 0;
}
.legal-foot {
  text-align: center;
  padding: 28px 24px;
}
.legal-foot .links { justify-content: center; }
.legal-foot .copy { display: block; margin-top: 10px; color: var(--grau); }

/* ============================================================
   responsive
   ============================================================ */
@media (max-width: 1000px) {
  .cells--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .hero-net { display: none; }
}

@media (max-width: 860px) {
  .cells { grid-template-columns: 1fr; }
  .plan-body { grid-template-columns: 1fr; }
  .connector { min-height: 72px; padding: 16px 24px; }
  .connector::before {
    left: 50%; right: auto; top: 0; bottom: 0;
    width: 1px; height: auto;
  }
  .connector .pulse {
    left: 50%; top: 0;
    width: 3px; height: 22px;
    margin: 0 0 0 -1.5px;
    background: linear-gradient(180deg, transparent, var(--strom), transparent);
    animation: taktV 2.4s linear infinite;
  }
  .connector .trans {
    writing-mode: horizontal-tb;
    padding: 4px 10px;
  }
}
@keyframes taktV {
  from { transform: translateY(-24px); }
  to   { transform: translateY(80px); }
}

@media (max-width: 720px) {
  .nav-links a:not(.cta) { display: none; }
  section { padding: 56px 0; }
  .hero { padding-top: 48px; }
  .hero-frame { padding: 48px 28px 40px; }
  .form-step, .form-intro { padding-left: 22px; padding-right: 22px; }
  .form-progress { margin-left: 22px; margin-right: 22px; }
  .form-step-indicator { padding-left: 22px; padding-right: 22px; }
  .form-nav { padding-left: 22px; padding-right: 22px; }
  .form-message { margin-left: 22px; margin-right: 22px; }
  .about-frame { padding: 40px 28px 12px; }
}

@media (max-width: 560px) {
  .btn-ghost { border-left: 1px solid var(--tiefe); border-top: none; }
  .cells--4 { grid-template-columns: 1fr; }
  .form-group--inline { grid-template-columns: 1fr; }
  .form-nav { flex-wrap: wrap; }
}

@media (max-width: 400px) {
  .wrap { padding: 0 16px; }
  .wordmark { padding: 14px 16px; }
  .nav-links a { padding: 0 16px; }
  .hero-frame { padding: 40px 20px 36px; }
  .cell { padding: 28px 20px; }
  .station { padding: 36px 20px 28px; }
  .btn { padding: 14px 20px; font-size: .9rem; }
  .form-step, .form-intro { padding-left: 16px; padding-right: 16px; }
  .form-progress { margin-left: 16px; margin-right: 16px; }
  .form-step-indicator { padding-left: 16px; padding-right: 16px; }
  .form-nav { padding-left: 16px; padding-right: 16px; }
  .form-message { margin-left: 16px; margin-right: 16px; }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}