/* ════════════════════════
   Edulia — Konzept „Bühne" · css/site.css
   Apple-Ruhe, Edulia-Marke. Quelle: WEBSITE_REDESIGN_SPEC.md
   Marken-Regel: Papier/Tinte/Rot, Mono + ein Serif-Rot-Wort, Cursor nur im
   Logo. Rot max. 2× pro Viewport. Nichts loopt außer dem Logo-Cursor.
   ════════════════════════ */

/* ── Fonts (self-hosted, DSGVO: keine Third-Party-Requests) ───────────── */
@font-face { font-family: "JetBrains Mono"; src: url("/fonts/JetBrainsMono-Regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("/fonts/JetBrainsMono-Medium.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("/fonts/JetBrainsMono-SemiBold.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("/fonts/JetBrainsMono-Bold.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Instrument Serif"; src: url("/fonts/InstrumentSerif-Italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Caveat"; src: url("/fonts/Caveat-Medium.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }

/* ── Tokens ────────────────────────────────────────────────────────────── */
:root {
  --paper: #F4F3EF;
  --ink: #161513;
  --red: #E2402A;
  --red-deep: #C93520;

  /* kontextabhängig — dunkle Kapitel spiegeln diese drei Werte */
  --bg: var(--paper);
  --fg: var(--ink);
  --muted: rgba(22, 21, 19, .60);
  --hairline: rgba(22, 21, 19, .14);

  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, system-ui, "Segoe UI", Roboto, sans-serif;
  --hand: "Caveat", cursive;

  --ease: cubic-bezier(.22, 1, .36, 1);
  --shadow-stage: 0 24px 80px rgba(22, 21, 19, .12); /* nur für Geräte (§2) */

  --gap-chapter: clamp(120px, 16vw, 240px);
  --nav-h: 64px;
}

/* ── Reset & Basis ─────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--fg);
  font: 400 19px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--red); color: var(--paper); }

img, svg, video { display: block; max-width: 100%; }
a { color: inherit; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul[role="list"], .bare { list-style: none; }

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

.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;
}

.skip-link {
  position: absolute; left: 16px; top: -64px; z-index: 200;
  background: var(--ink); color: var(--paper);
  font: 600 13px var(--mono); padding: 10px 16px; border-radius: 6px;
  text-decoration: none; transition: top .2s var(--ease);
}
.skip-link:focus { top: 12px; }

/* ── Container & Kapitel-Rhythmus (§5.1) ──────────────────────────────── */
.container { width: min(100% - 48px, 1100px); margin-inline: auto; }
.container--wide { width: min(100% - 48px, 1280px); }

.chapter { padding-block: calc(var(--gap-chapter) / 2); }
.chapter > .container > * + *,
.chapter > .container--wide > * + * { margin-top: 28px; }

/* Dunkle Kapitel: Tokens spiegeln (§5.4) */
.chapter--ink {
  --bg: var(--ink);
  --fg: var(--paper);
  --muted: rgba(244, 243, 239, .65);
  --hairline: rgba(244, 243, 239, .18);
  background: var(--bg);
  color: var(--fg);
  padding-block: calc(var(--gap-chapter) / 1.6);
}

/* ── Typo-Stimmen (§5.2) ──────────────────────────────────────────────── */
.eyebrow {
  font: 600 13px/1 var(--mono);
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted);
}

.h1 {
  font: 700 clamp(56px, 9vw, 152px)/1.02 var(--sans);
  letter-spacing: -.045em;
  text-wrap: balance;
}

.claim {
  font: 700 clamp(40px, 6vw, 96px)/1.04 var(--sans);
  letter-spacing: -.035em;
  text-wrap: balance;
}

/* Das eine Serif-Rot-Wort pro Headline — die emotionale Stimme (§2) */
.h1 em, .claim em, .fine-title em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--red);
  letter-spacing: -.01em;
}

.lede {
  font-size: clamp(19px, 2.2vw, 23px);
  line-height: 1.55;
  color: var(--muted);
  max-width: 62ch;
  text-wrap: pretty;
}

.mono-points {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 10px 14px;
  font: 500 14px/1.4 var(--mono);
  color: var(--muted);
  list-style: none;
}
.mono-points li + li::before { content: "·"; margin-right: 14px; opacity: .5; }

/* Fußnoten-Ziffern: Mono, Tinte — Fußnoten machen Witze, relativieren nie (§7.6) */
sup.fn { font: 600 .55em var(--mono); vertical-align: super; letter-spacing: 0; }
sup.fn a { text-decoration: none; color: var(--muted); }
sup.fn a:hover { color: var(--fg); }

/* ── Buttons & Links — genau EIN roter Button pro Viewport (§4) ───────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  font: 600 15px/1 var(--mono);
  padding: 16px 28px;
  border-radius: 999px;
  text-decoration: none;
  transition: background-color .25s var(--ease), color .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
}
.btn:active { transform: scale(.98); }

.btn--red { background: var(--red); color: #fff; }
.btn--red:hover { background: var(--red-deep); }

.btn--ghost { border: 1px solid var(--hairline); color: var(--fg); }
.btn--ghost:hover { border-color: var(--fg); }

.link-more {
  display: inline-flex; align-items: baseline; gap: 6px;
  font: 600 15px/1 var(--mono);
  color: var(--red);
  text-decoration: none;
}
.link-more .arr { transition: transform .25s var(--ease); }
.link-more:hover .arr { transform: translateX(4px); }

.link-quiet {
  font: 500 15px/1 var(--mono);
  color: var(--muted); text-decoration: none;
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 2px;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.link-quiet:hover { color: var(--fg); border-color: var(--fg); }

/* ── Logo — Wortmarke + Block-Cursor. Blinkt NUR hier (§2). ───────────── */
.logo {
  display: inline-flex; align-items: baseline;
  font: 700 20px/1 var(--mono);
  letter-spacing: -.02em;
  text-decoration: none;
  color: var(--fg);
}
.logo .cur {
  display: inline-block;
  width: .52em; height: 1.06em;
  margin-left: .1em;
  background: var(--red);
  transform: translateY(.14em);
  animation: cursor-blink 1.1s steps(1) infinite;
}
@keyframes cursor-blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

/* ── Navigation (§4): schmal, Papier + blur, Hairline unten ───────────── */
.site-nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(244, 243, 239, .82);
  -webkit-backdrop-filter: saturate(1.2) blur(18px);
  backdrop-filter: saturate(1.2) blur(18px);
  border-bottom: 1px solid var(--hairline);
}
.nav-inner {
  width: min(100% - 48px, 1280px); margin-inline: auto;
  height: 100%;
  display: flex; align-items: center; gap: 8px;
}
.nav-menu {
  display: flex; align-items: center; gap: 2px;
  list-style: none;
  margin-left: 28px;
}
.nav-menu > li { position: relative; }

.nav-link, .nav-drop-btn {
  display: inline-flex; align-items: center; gap: 6px;
  font: 500 13.5px/1 var(--mono);
  color: var(--muted);
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 8px;
  transition: color .2s var(--ease);
}
.nav-link:hover, .nav-drop-btn:hover,
.nav-drop-btn[aria-expanded="true"] { color: var(--fg); }
.nav-drop-btn .chev { font-size: 9px; transform: translateY(1px); opacity: .55; }

.nav-panel {
  position: absolute; top: calc(100% + 10px); left: 0;
  min-width: 240px;
  background: var(--paper);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 8px;
  display: none;
}
.nav-panel.open { display: block; }
.nav-panel a {
  display: block;
  font: 500 14px/1.3 var(--mono);
  color: var(--fg);
  text-decoration: none;
  padding: 11px 14px;
  border-radius: 8px;
}
.nav-panel a:hover { background: rgba(22, 21, 19, .05); }
.nav-panel a small { display: block; font: 400 12px/1.4 var(--sans); color: var(--muted); margin-top: 2px; }

.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.nav-right .btn { padding: 11px 20px; font-size: 13.5px; }

/* Nav-CTA erscheint erst, wenn der Hero-CTA aus dem Bild ist —
   Regel: genau EIN roter Button pro Viewport. Ohne JS: sichtbar. */
html.js .nav-cta { opacity: 0; visibility: hidden; transform: translateY(-4px); transition: opacity .3s var(--ease), transform .3s var(--ease), visibility 0s .3s; }
html.js .nav-cta.show { opacity: 1; visibility: visible; transform: none; transition: opacity .3s var(--ease), transform .3s var(--ease); }

.nav-burger { display: none; }

/* Mobile Sheet */
.nav-sheet {
  position: fixed; inset: var(--nav-h) 0 0 0; z-index: 99;
  background: var(--paper);
  padding: 28px 24px 40px;
  overflow-y: auto;
  display: none;
}
.nav-sheet.open { display: block; }
.sheet-group { padding: 18px 0; border-bottom: 1px solid var(--hairline); }
.sheet-group h3 { font: 600 12px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.sheet-group a { display: block; font: 500 17px/1.3 var(--mono); color: var(--fg); text-decoration: none; padding: 9px 0; }
.sheet-cta { display: grid; gap: 10px; padding-top: 24px; }

@media (max-width: 900px) {
  .nav-menu, .nav-right .btn--ghost { display: none; }
  .nav-burger {
    display: inline-flex; flex-direction: column; justify-content: center; gap: 5px;
    width: 40px; height: 40px; align-items: center;
  }
  .nav-burger .bar { width: 18px; height: 1.5px; background: var(--fg); transition: transform .3s var(--ease), opacity .3s var(--ease); }
  .nav-burger[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(3.25px) rotate(45deg); }
  .nav-burger[aria-expanded="true"] .bar:nth-child(2) { transform: translateY(-3.25px) rotate(-45deg); }
}

/* ── Reveal-Motion (§5.6): Fade+Rise 24px, 700ms, einmalig ────────────── */
html.js:not(.reduced) [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: var(--d, 0s);
}
html.js:not(.reduced) [data-reveal].in { opacity: 1; transform: none; }

/* Mockups settlen mit Scale 1.02 → 1 */
html.js:not(.reduced) [data-settle] {
  opacity: 0;
  transform: translateY(24px) scale(1.02);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  transition-delay: var(--d, 0s);
}
html.js:not(.reduced) [data-settle].in { opacity: 1; transform: none; }

/* Headline-Reveal wortweise */
html.js:not(.reduced) .w { display: inline-block; opacity: 0; transform: translateY(.35em); transition: opacity .6s var(--ease), transform .6s var(--ease); transition-delay: var(--wd, 0s); }
html.js:not(.reduced) .in .w, html.js:not(.reduced) .w.in { opacity: 1; transform: none; }

/* ── Hero (§6.1) ──────────────────────────────────────────────────────── */
.hero {
  padding-top: calc(var(--nav-h) + clamp(56px, 9vw, 120px));
  text-align: center;
  overflow: clip;
}
.hero .eyebrow { margin-bottom: 22px; }
.hero .lede { margin: 26px auto 0; }
.hero-cta { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 18px; margin-top: 38px; }

/* Geräte-Duo, halb angeschnitten am Fold */
.hero-stage {
  position: relative;
  margin-top: clamp(56px, 8vw, 96px);
  height: clamp(300px, 42vw, 560px);
  display: flex; justify-content: center; align-items: flex-start; gap: clamp(16px, 3vw, 48px);
}
.hero-stage .device--browser { width: min(680px, 62vw); }
.hero-stage .device--phone { width: clamp(148px, 17vw, 230px); margin-top: clamp(32px, 5vw, 72px); }

/* ── Manifest (§6.2) ──────────────────────────────────────────────────── */
.manifest { text-align: center; }
.manifest p {
  font: 700 clamp(30px, 4.6vw, 68px)/1.15 var(--sans);
  letter-spacing: -.03em;
  color: var(--muted);
  text-wrap: balance;
}
.manifest p + p { margin-top: clamp(20px, 3vw, 40px); }
.manifest p:last-child { color: var(--fg); }
.manifest em { font-family: var(--serif); font-style: italic; font-weight: 400; color: var(--red); }

/* ── Die Weiche (§6.3) ────────────────────────────────────────────────── */
.switch-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 48px; }
.switch-card {
  border: 1px solid var(--hairline);
  border-radius: 18px;
  padding: 32px 28px;
  text-align: left;
  text-decoration: none;
  display: flex; flex-direction: column; gap: 10px;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.switch-card:hover { border-color: var(--fg); transform: translateY(-2px); }
.switch-card h3 { font: 600 17px/1.35 var(--mono); letter-spacing: -.01em; }
.switch-card p { font-size: 16px; color: var(--muted); }
.switch-card .arr { font: 600 15px var(--mono); margin-top: auto; padding-top: 14px; }

/* ── Produkt-Kapitel (§6.4): ein Gedanke pro Screen ───────────────────── */
.product { min-height: 100svh; display: flex; align-items: center; text-align: center; }
.product .stage { margin: clamp(40px, 6vw, 64px) auto 0; display: flex; justify-content: center; }
.product .mono-points { margin-top: 36px; }
.product .link-more { margin-top: 26px; }

/* ── Geräte-Mockups (§5.5): DOM/CSS, weicher Bühnen-Schatten ──────────── */
.device { box-shadow: var(--shadow-stage); }

.device--phone {
  width: 280px;
  background: var(--ink);
  border-radius: 46px;
  padding: 10px;
}
.chapter--ink .device--phone { background: #2A2825; }
.device--phone .screen {
  background: #FCFBF9;
  color: var(--ink);
  border-radius: 37px;
  aspect-ratio: 9 / 19;
  overflow: hidden;
  position: relative;
  padding: 52px 16px 16px;
  text-align: left;
}
.device--phone .notch {
  position: absolute; top: 12px; left: 50%; transform: translateX(-50%);
  width: 86px; height: 24px; border-radius: 999px;
  background: var(--ink);
}
.chapter--ink .device--phone .notch { background: #2A2825; }

.device--browser {
  width: 640px; max-width: 100%;
  background: #FCFBF9;
  color: var(--ink);
  border: 1px solid rgba(22, 21, 19, .18);
  border-radius: 16px;
  overflow: hidden;
}
.device--browser .chrome {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 16px;
  border-bottom: 1px solid rgba(22, 21, 19, .10);
}
.device--browser .dots { display: flex; gap: 5px; }
.device--browser .dots i { width: 9px; height: 9px; border-radius: 50%; border: 1px solid rgba(22, 21, 19, .25); }
.device--browser .url {
  font: 500 11px/1 var(--mono); color: rgba(22, 21, 19, .55);
  background: rgba(22, 21, 19, .05);
  border-radius: 6px; padding: 6px 12px;
  margin-inline: auto;
}
.device--browser .viewport { padding: 20px; }

/* Innenleben der Screens — Mono-Präzision, Demo-Ensemble Lernwerk Musterstadt */
.ui-label { font: 600 9px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: rgba(22, 21, 19, .45); }
.ui-h { font: 600 15px/1.3 var(--mono); letter-spacing: -.01em; margin-top: 4px; }
.ui-card {
  border: 1px solid rgba(22, 21, 19, .12);
  border-radius: 12px;
  padding: 12px 14px;
  background: #fff;
}
.ui-card + .ui-card { margin-top: 8px; }
.ui-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 4px 8px; }
.ui-t { font: 600 12px/1.35 var(--sans); color: var(--ink); }
.ui-s { font: 400 10.5px/1.4 var(--sans); color: rgba(22, 21, 19, .55); }
.ui-m { font: 600 10px/1.3 var(--mono); color: rgba(22, 21, 19, .60); }
/* Chips bleiben monochrom — Rot gehört dem Serif-Wort und dem CTA (§5.3) */
.ui-chip {
  display: inline-block;
  font: 600 8.5px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase;
  color: rgba(22, 21, 19, .55);
  border: 1px solid rgba(22, 21, 19, .25);
  border-radius: 999px; padding: 4px 8px;
}

/* Wochenplan (Termine) */
.week { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; }
.week .day { min-height: 210px; border: 1px solid rgba(22, 21, 19, .10); border-radius: 10px; padding: 8px 7px; background: #fff; }
.week .day h4 { font: 600 9px/1 var(--mono); letter-spacing: .1em; color: rgba(22, 21, 19, .45); margin-bottom: 8px; text-transform: uppercase; }
.lesson {
  border-left: 3px solid var(--ink);
  background: rgba(22, 21, 19, .045);
  border-radius: 6px;
  padding: 6px 7px;
  margin-bottom: 6px;
}
.lesson .ui-m { color: rgba(22, 21, 19, .5); font-size: 8.5px; }
.lesson .ui-t { font-size: 10.5px; }
html.js:not(.reduced) .lesson--snap { opacity: 0; transform: translateY(-10px); transition: opacity .6s var(--ease) .55s, transform .6s var(--ease) .55s; }
html.js:not(.reduced) .in .lesson--snap { opacity: 1; transform: none; }

/* Chat-Thread */
.thread { display: flex; flex-direction: column; gap: 8px; }
.bubble {
  max-width: 82%;
  border-radius: 14px;
  padding: 9px 12px;
  font: 400 11.5px/1.45 var(--sans);
  background: rgba(22, 21, 19, .06);
  color: var(--ink);
}
.bubble--me { align-self: flex-end; background: var(--ink); color: var(--paper); border-bottom-right-radius: 4px; }
.bubble--sys {
  align-self: center; text-align: center;
  background: none;
  border: 1px dashed rgba(22, 21, 19, .25);
  font: 500 9.5px/1.5 var(--mono);
  color: rgba(22, 21, 19, .6);
  max-width: 94%;
}
.bubble .who { display: block; font: 600 9px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: rgba(22, 21, 19, .45); margin-bottom: 4px; }
.bubble--me .who { color: rgba(244, 243, 239, .6); }
html.js:not(.reduced) .bubble--late { opacity: 0; transform: translateY(10px); transition: opacity .6s var(--ease) .7s, transform .6s var(--ease) .7s; }
html.js:not(.reduced) .in .bubble--late { opacity: 1; transform: none; }

/* Rechnung */
.invoice { font-family: var(--mono); }
.invoice .inv-head { display: flex; justify-content: space-between; align-items: baseline; padding-bottom: 10px; border-bottom: 1px solid rgba(22, 21, 19, .14); }
.invoice .inv-no { font: 700 13px/1 var(--mono); }
.invoice .inv-line { display: flex; justify-content: space-between; gap: 12px; padding: 9px 0; border-bottom: 1px solid rgba(22, 21, 19, .08); font: 400 11px/1.4 var(--mono); color: rgba(22, 21, 19, .75); }
.invoice .inv-line strong { font-weight: 600; color: var(--ink); }
.invoice .inv-total { display: flex; justify-content: space-between; padding-top: 12px; font: 700 13px/1 var(--mono); }
html.js:not(.reduced) .inv-line { opacity: 0; transform: translateY(8px); transition: opacity .5s var(--ease) var(--d, 0s), transform .5s var(--ease) var(--d, 0s); }
html.js:not(.reduced) .in .inv-line { opacity: 1; transform: none; }

/* Dashboard-Kacheln */
.kpi-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.kpi { border: 1px solid rgba(22, 21, 19, .12); border-radius: 12px; padding: 14px; background: #fff; }
.kpi .ui-label { font-size: 8.5px; }
.kpi .val { font: 700 20px/1.1 var(--mono); letter-spacing: -.02em; margin-top: 8px; }
.kpi .sub { font: 500 9px/1.3 var(--mono); color: rgba(22, 21, 19, .5); margin-top: 4px; }
.bars { display: flex; align-items: flex-end; gap: 6px; height: 72px; margin-top: 14px; }
.bars i { flex: 1; background: rgba(22, 21, 19, .16); border-radius: 3px 3px 0 0; }

/* ── Der Film (§6.5): Sticky-Szene, 4 Standbilder, KEIN Scrubbing ─────── */
.film-scroll { position: relative; }
html.js:not(.reduced) .film-scroll { height: 340vh; }
.film-marks { position: absolute; inset: 0; pointer-events: none; }
.film-mark { height: 25%; }
.film-stage {
  /* Telefonbreite folgt der Viewport-Höhe, damit Titel + Gerät + Timestamps
     gemeinsam in die Sticky-Bühne passen (Screen-Ratio 9/19 + Rahmen). */
  --phone-w: clamp(150px, calc((100svh - 300px) * .45), 280px);
  display: flex; flex-direction: column; align-items: center; gap: clamp(20px, 4vh, 40px);
  text-align: center;
}
html.js:not(.reduced) .film-stage {
  position: sticky; top: 0;
  min-height: 100svh;
  justify-content: center;
  padding-block: calc(var(--nav-h) + 16px) 24px;
}
.film-stage .claim { font-size: clamp(28px, 5.6vh, 72px); }
@media (max-width: 700px) {
  /* schmale Screens: Titel wrappt mehr → mehr Höhe fürs Textfeld reservieren */
  .film-stage { --phone-w: clamp(140px, calc((100svh - 380px) * .45), 240px); }
  .film-stage .claim { font-size: clamp(24px, 7.5vw, 40px); }
}
.film-frames { position: relative; width: var(--phone-w); }
.film-frames .device--phone { width: var(--phone-w); padding: clamp(6px, 1.2vh, 10px); }
.film-frames .device--phone .screen { padding: clamp(34px, 6.5vh, 52px) 14px 14px; border-radius: clamp(24px, 4.6vh, 37px); }
html.js:not(.reduced) .film-frame { position: absolute; inset: 0; opacity: 0; transition: opacity .6s var(--ease); }
html.js:not(.reduced) .film-frame.on { opacity: 1; }
html.js:not(.reduced) .film-frame:first-child { position: relative; }
.film-steps { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px 22px; list-style: none; }
.film-steps li { font: 500 13px/1.5 var(--mono); color: var(--muted); transition: color .4s var(--ease); }
.film-steps li strong { font-weight: 600; color: inherit; }
html.js:not(.reduced) .film-steps li.on { color: var(--fg); }
/* reduced-motion / kein JS: Standbild-Reihe (§5.7) */
html.reduced .film-frames, html:not(.js) .film-frames {
  width: auto; display: flex; flex-wrap: wrap; gap: 24px; justify-content: center;
}
html.reduced .film-frame, html:not(.js) .film-frame { width: 220px; }
.film-frame .ts { font: 600 11px/1 var(--mono); color: var(--muted); margin-top: 14px; text-align: center; }
/* im Sticky-Modus übernimmt .film-steps die Timestamps */
html.js:not(.reduced) .film-frame .ts { display: none; }

/* ── Der Vergleich (§6.6) ─────────────────────────────────────────────── */
.compare-wrap { position: relative; margin-top: 56px; }
.compare-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.compare {
  width: 100%; min-width: 660px;
  border-collapse: collapse;
  font: 500 14px/1.5 var(--mono);
}
.compare th, .compare td { padding: 18px 16px; border-bottom: 1px solid var(--hairline); }
.compare thead th { font: 600 13px/1.4 var(--mono); text-align: center; vertical-align: bottom; padding-bottom: 14px; }
.compare thead th:first-child { text-align: left; }
.compare tbody th { font: 400 15px/1.45 var(--sans); text-align: left; color: var(--fg); width: 38%; }
.compare td { text-align: center; color: var(--muted); }
.compare td.yes { color: var(--fg); font-weight: 700; }
.compare .col-edulia { font-weight: 700; }

/* Caveat-Randnotiz (§7.7) — max. 1× pro Seite */
.margin-note {
  position: absolute; right: -10px; top: -44px;
  font: 500 22px/1.2 var(--hand);
  color: var(--muted);
  transform: rotate(-4deg);
}

/* ── Specs (§6.7) ─────────────────────────────────────────────────────── */
.spec-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--hairline);
  margin-top: 56px;
}
.spec {
  padding: 26px 20px 30px;
  border-bottom: 1px solid var(--hairline);
  text-align: center;
}
.spec .val { font: 700 clamp(20px, 2.4vw, 28px)/1.15 var(--mono); letter-spacing: -.02em; }
.spec .cap { font: 500 12.5px/1.5 var(--mono); color: var(--muted); margin-top: 8px; }
.spec-note { font: 400 15px/1.65 var(--sans); color: var(--muted); text-align: center; max-width: 56ch; margin: 36px auto 0; }

/* ── Finale (§6.9) ────────────────────────────────────────────────────── */
.finale { text-align: center; }
.finale .claim { font-size: clamp(48px, 7.5vw, 120px); }
.finale-sub { font: 500 15px/1.6 var(--mono); color: var(--muted); margin-top: 26px; }
.finale .hero-cta { margin-top: 34px; }
.store-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 40px; }

/* Store-Badges (aus Concept B übernommen, §1.5) */
.appstore {
  display: inline-flex; align-items: center; gap: 10px;
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 10px 18px 10px 14px;
  text-decoration: none;
  color: var(--fg);
  transition: border-color .25s var(--ease);
}
.appstore:hover { border-color: var(--fg); }
.appstore svg { width: 22px; height: 22px; }
.appstore .lines { display: flex; flex-direction: column; text-align: left; }
.appstore .lines .s { font: 400 10px/1.2 var(--sans); color: var(--muted); }
.appstore .lines .l { font: 600 15px/1.2 var(--sans); letter-spacing: -.01em; }

/* ── Footer (§4) ──────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--hairline);
  padding: 64px 0 48px;
  margin-top: calc(var(--gap-chapter) / 2);
}
/* Fußnoten-Block der Seite: eigene Sektion direkt über dem Footer-Include */
.footnotes-sec {
  border-top: 1px solid var(--hairline);
  margin-top: calc(var(--gap-chapter) / 2);
  padding: 40px 0 0;
}
.footnotes-sec + .site-footer { margin-top: 48px; }
.footnotes { display: grid; gap: 10px; }
.footnotes p { font: 400 13px/1.6 var(--mono); color: var(--muted); max-width: 72ch; }
.footnotes p b { font-weight: 600; color: var(--fg); }

.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.footer-grid h3 { font: 600 12px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; }
.footer-grid ul { list-style: none; display: grid; gap: 9px; }
.footer-grid a { font: 400 14px/1.5 var(--sans); color: var(--fg); text-decoration: none; opacity: .85; }
.footer-grid a:hover { opacity: 1; text-decoration: underline; text-underline-offset: 3px; }
.footer-stores { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; margin-top: 14px; }
.footer-stores .appstore { padding: 8px 14px 8px 11px; border-radius: 10px; }
.footer-stores .appstore svg { width: 17px; height: 17px; }
.footer-stores .appstore .lines .l { font-size: 13px; }
.footer-stores .appstore .lines .s { font-size: 9px; }

.footer-bottom {
  display: flex; flex-wrap: wrap; align-items: center; gap: 14px 28px;
  border-top: 1px solid var(--hairline);
  margin-top: 56px; padding-top: 28px;
}
.signoff { font: 500 12.5px/1.5 var(--mono); color: var(--muted); }
.footer-meta { margin-left: auto; display: flex; flex-wrap: wrap; gap: 4px 20px; font: 400 12.5px/1.5 var(--mono); color: var(--muted); }
.footer-meta a { color: inherit; text-decoration: none; }
.footer-meta a:hover { color: var(--fg); }

/* ── Responsive ───────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  body { font-size: 17px; }
  .switch-grid { grid-template-columns: 1fr; }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .spec-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stage { height: auto; flex-direction: column; align-items: center; gap: 28px; padding-bottom: 0; }
  .hero-stage .device--browser { width: 100%; }
  .hero-stage .device--phone { margin-top: 0; width: 220px; }
  .week { grid-template-columns: repeat(3, 1fr); }
  .week .day:nth-child(n+4) { display: none; }
}
@media (max-width: 480px) {
  .spec-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-cta { flex-direction: column; }
  .margin-note { position: static; display: inline-block; margin-bottom: 12px; transform: rotate(-3deg); }
}

/* ════════════════════════
   Unterseiten-Komponenten (Phase 2)
   ════════════════════════ */

/* ── Produktseiten-Hero (§7.1): Claim der Startseite, größer ──────────── */
.claim--hero { font-size: clamp(44px, 7.2vw, 120px); }
.page-hero { padding-top: calc(var(--nav-h) + clamp(56px, 9vw, 110px)); text-align: center; }
.page-hero .eyebrow { margin-bottom: 20px; }
.page-hero .lede { margin: 24px auto 0; }
.page-hero .stage { margin-top: clamp(44px, 6vw, 80px); display: flex; justify-content: center; }
.page-hero .hero-cta { margin-top: 34px; }

/* ── Sticky-Szene (§7.1): Gerät steht, 3 Screens + Captions wechseln ──── */
.scene-scroll { position: relative; }
html.js:not(.reduced) .scene-scroll { height: 300vh; }
.scene-marks { position: absolute; inset: 0; pointer-events: none; }
.scn-mark { height: 33.334%; }

.scene-stage {
  --scn-phone-w: clamp(150px, calc((100svh - 220px) * .44), 280px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  column-gap: clamp(24px, 4vw, 72px);
}
html.js:not(.reduced) .scene-stage {
  position: sticky; top: 0;
  min-height: 100svh;
  padding-block: calc(var(--nav-h) + 16px) 24px;
}
.scene-device { grid-column: 2; grid-row: 1; }
.scene-device .device--phone { width: var(--scn-phone-w); padding: clamp(6px, 1.2vh, 10px); }
.scene-device .device--phone .screen { padding: clamp(30px, 6vh, 52px) 14px 14px; border-radius: clamp(22px, 4.6vh, 37px); }
.scene-device .device--browser { width: min(560px, 44vw); }

.scn-frames { position: relative; }
html.js:not(.reduced) .scn-frame { position: absolute; inset: 0; opacity: 0; transition: opacity .5s var(--ease); }
html.js:not(.reduced) .scn-frame:first-child { position: relative; }
html.js:not(.reduced) .scn-frame.on { opacity: 1; }

.scn-cap { max-width: 320px; }
.scn-cap[data-side="l"] { grid-column: 1; grid-row: 1; justify-self: end; text-align: right; }
.scn-cap[data-side="r"] { grid-column: 3; grid-row: 1; justify-self: start; text-align: left; }
.scn-cap .cap-k { font: 600 12px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--muted); }
.scn-cap h3 { font: 600 21px/1.35 var(--mono); letter-spacing: -.01em; margin-top: 10px; }
.scn-cap p { font-size: 16.5px; line-height: 1.6; color: var(--muted); margin-top: 10px; }
html.js:not(.reduced) .scn-cap { opacity: 0; transform: translateY(16px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
html.js:not(.reduced) .scn-cap.on { opacity: 1; transform: none; }

/* reduced-motion / kein JS: alle Captions untereinander, erster Screen steht */
html.reduced .scene-stage, html:not(.js) .scene-stage { grid-template-columns: 1fr; row-gap: 36px; }
html.reduced .scene-device, html:not(.js) .scene-device { grid-column: 1; grid-row: 1; justify-self: center; }
html.reduced .scn-cap, html:not(.js) .scn-cap,
html.reduced .scn-cap[data-side="l"], html:not(.js) .scn-cap[data-side="l"],
html.reduced .scn-cap[data-side="r"], html:not(.js) .scn-cap[data-side="r"] {
  grid-column: 1; grid-row: auto; justify-self: center; text-align: center; max-width: 46ch;
}
html.reduced .scn-frame:not(:first-child), html:not(.js) .scn-frame:not(:first-child) { display: none; }

@media (max-width: 900px) {
  .scene-stage { --scn-phone-w: clamp(140px, calc((100svh - 460px) * .44), 240px); grid-template-columns: 1fr; row-gap: 28px; }
  .scene-device { grid-column: 1; grid-row: 1; justify-self: center; }
  .scene-device .device--browser { width: 100%; }
  .scn-cap, .scn-cap[data-side="l"], .scn-cap[data-side="r"] {
    grid-column: 1; grid-row: 2; justify-self: center; text-align: center; max-width: 42ch;
  }
}

/* ── Detail-Duett (§7.1) ──────────────────────────────────────────────── */
.duet { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 56px; text-align: left; }
.duet > div { border-top: 1px solid var(--hairline); padding-top: 22px; }
.duet h3 { font: 600 15px/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.duet p { font-size: 17px; color: var(--muted); margin-top: 10px; max-width: 48ch; }
@media (max-width: 700px) { .duet { grid-template-columns: 1fr; } }

/* ── Modul-Specs (§7.1): Mono-Tabelle mit Hairlines ───────────────────── */
.mspec { margin-top: 56px; border-top: 1px solid var(--hairline); text-align: left; }
.mspec > div { display: grid; grid-template-columns: 220px 1fr; gap: 16px; padding: 18px 4px; border-bottom: 1px solid var(--hairline); }
.mspec dt { font: 600 12.5px/1.6 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.mspec dd { font: 500 15px/1.6 var(--mono); }
@media (max-width: 600px) { .mspec > div { grid-template-columns: 1fr; gap: 4px; } }

/* ── Cross-Link-Band (§7.1): „Weiter: Chat >" ─────────────────────────── */
.next-band { border-block: 1px solid var(--hairline); padding: clamp(40px, 6vw, 72px) 0; text-align: center; }
.next-band a { text-decoration: none; color: var(--fg); }
.next-band .claim { font-size: clamp(32px, 4.5vw, 64px); }
.next-band .arr { display: inline-block; transition: transform .25s var(--ease); }
.next-band a:hover .arr { transform: translateX(6px); }

/* ── CTA-Block (§7.1) ─────────────────────────────────────────────────── */
.cta-block { text-align: center; }

/* ── Preise (§7.4) ────────────────────────────────────────────────────── */
.price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 56px; text-align: left; }
@media (max-width: 800px) { .price-grid { grid-template-columns: 1fr; } }
.price-card {
  border: 1px solid var(--hairline);
  border-radius: 20px;
  padding: 38px 34px;
  display: flex; flex-direction: column; gap: 0;
}
.price-card .eyebrow { margin-bottom: 26px; }
.price-val { font: 700 clamp(44px, 5vw, 60px)/1 var(--mono); letter-spacing: -.03em; }
.price-per { font: 500 14px/1.5 var(--mono); color: var(--muted); margin-top: 8px; }
.price-alt { font: 500 13px/1.6 var(--mono); color: var(--muted); margin-top: 12px; border-top: 1px solid var(--hairline); padding-top: 12px; }
.price-note { font-size: 16px; color: var(--muted); margin-top: 18px; }
.price-feats { list-style: none; margin-top: 26px; }
.price-feats li {
  font: 500 14.5px/1.5 var(--mono);
  padding: 12px 0;
  border-top: 1px solid var(--hairline);
  display: flex; gap: 12px; align-items: baseline;
}
.price-feats li::before { content: "✓"; font-weight: 700; }
.price-card .btn { margin-top: 30px; align-self: flex-start; }

/* ── Ablauf-Schritte (/institute, §7.2) ───────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 56px; text-align: left; }
@media (max-width: 800px) { .steps { grid-template-columns: 1fr; } }
.step { border-top: 1px solid var(--hairline); padding-top: 20px; }
/* Nummern bleiben Tinte — Rot gehört dem Serif-Wort und dem CTA (§5.3) */
.step .no { font: 700 13px/1 var(--mono); letter-spacing: .14em; color: var(--muted); }
.step h3 { font: 600 17px/1.4 var(--mono); margin-top: 12px; }
.step p { font-size: 16.5px; color: var(--muted); margin-top: 8px; }

/* ── Formulare (/registrieren, /institute) ────────────────────────────── */
.hidden { display: none !important; }

.card-focus {
  width: min(100%, 560px);
  margin-inline: auto;
  border: 1px solid var(--hairline);
  border-radius: 20px;
  padding: clamp(28px, 5vw, 44px);
  background: rgba(255, 255, 255, .45);
  text-align: left;
}

.field { margin-bottom: 18px; }
.field label { display: block; font: 600 12px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.field label .opt { text-transform: none; letter-spacing: 0; font-weight: 400; }
.field input, .field textarea {
  width: 100%;
  font: 400 16px/1.5 var(--sans);
  color: var(--fg);
  background: #fff;
  border: 1px solid rgba(22, 21, 19, .22);
  border-radius: 10px;
  padding: 13px 14px;
}
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus-visible, .field textarea:focus-visible { outline: 2px solid var(--red); outline-offset: 0; border-color: transparent; }
.field input[aria-invalid="true"] { border-color: var(--red); }

.form-error {
  font: 500 14px/1.5 var(--mono);
  color: var(--red);
  border: 1px solid currentColor;
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 18px;
}
.form-error.warn { color: var(--fg); }

.form-hint { font-size: 13.5px; line-height: 1.6; color: var(--muted); margin-top: 14px; }
.form-hint a { color: inherit; }

.form-progress { display: flex; gap: 8px; margin-bottom: 24px; }
.form-progress i { width: 26px; height: 4px; border-radius: 2px; background: var(--hairline); transition: background-color .3s var(--ease); }
.form-progress i.on { background: var(--fg); }

.reg-note { font-size: 15px; line-height: 1.6; color: var(--muted); margin-bottom: 18px; }

.strength { display: flex; gap: 5px; margin-top: 8px; }
.strength i { flex: 1; height: 3px; border-radius: 2px; background: var(--hairline); transition: background-color .25s var(--ease); }
.strength i.on { background: var(--muted); }
.strength i.on.ok { background: var(--fg); }

.reg-check { display: flex; gap: 12px; align-items: flex-start; font-size: 14.5px; line-height: 1.55; color: var(--muted); margin: 4px 0 20px; cursor: pointer; }
.reg-check input { width: 17px; height: 17px; margin-top: 2px; accent-color: var(--red); flex: none; }
.reg-check a { color: var(--fg); }

.form-actions .btn { width: 100%; }

.success-card { text-align: left; }
.success-card .stamp {
  display: inline-block;
  font: 700 11px/1 var(--mono); letter-spacing: .18em; text-transform: uppercase;
  color: var(--red);
  border: 1.5px solid currentColor;
  border-radius: 6px;
  padding: 7px 10px;
  transform: rotate(-2deg);
  margin-bottom: 18px;
}
.success-card h3 { font: 700 26px/1.2 var(--sans); letter-spacing: -.02em; }
.success-card p { font-size: 16px; color: var(--muted); margin-top: 12px; }
.success-card .store-row { justify-content: flex-start; margin-top: 24px; }

@keyframes shake { 0%, 100% { transform: none; } 25% { transform: translateX(-5px); } 75% { transform: translateX(5px); } }
.shake { animation: shake .3s var(--ease) 2; }

/* ── FAQ (details, /institute-Auszug & /hilfe) ────────────────────────── */
.faq { margin-top: 48px; border-top: 1px solid var(--hairline); text-align: left; }
.faq details { border-bottom: 1px solid var(--hairline); }
.faq summary {
  display: flex; align-items: baseline; gap: 16px;
  font: 600 16px/1.5 var(--mono);
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .f-idx { font: 600 12px/1.6 var(--mono); color: var(--muted); flex: none; }
.faq summary .mark { margin-left: auto; font-weight: 400; color: var(--muted); transition: transform .3s var(--ease); }
.faq details[open] summary .mark { transform: rotate(45deg); }
.faq details p { font-size: 16.5px; line-height: 1.65; color: var(--muted); padding: 0 4px 22px; max-width: 68ch; }
.faq details p a { color: var(--fg); }

/* ── Der Weg einer Stunde (/lehrkraefte): 4 Standbilder ───────────────── */
.lesson-path { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 56px; text-align: left; }
@media (max-width: 900px) { .lesson-path { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .lesson-path { grid-template-columns: 1fr; } }
.path-step .ts { font: 600 12px/1 var(--mono); letter-spacing: .08em; color: var(--muted); margin-bottom: 12px; }
.path-step .ui-card { border-color: var(--hairline); background: rgba(252, 251, 249, .97); }

/* ── /sicherheit: die eine ganz dunkle Seite (§7.5) ───────────────────── */
body.theme-ink { background: var(--ink); }
body.theme-ink .site-nav { background: rgba(22, 21, 19, .78); border-bottom-color: rgba(244, 243, 239, .18); }
body.theme-ink .site-nav .nav-link, body.theme-ink .site-nav .nav-drop-btn { color: rgba(244, 243, 239, .65); }
body.theme-ink .site-nav .nav-link:hover, body.theme-ink .site-nav .nav-drop-btn:hover,
body.theme-ink .site-nav .nav-drop-btn[aria-expanded="true"] { color: var(--paper); }
body.theme-ink .site-nav .logo { color: var(--paper); }
body.theme-ink .site-nav .btn--ghost { color: var(--paper); border-color: rgba(244, 243, 239, .3); }
body.theme-ink .site-nav .btn--ghost:hover { border-color: var(--paper); }
body.theme-ink .nav-panel { background: var(--ink); border-color: rgba(244, 243, 239, .18); }
body.theme-ink .nav-panel a { color: var(--paper); }
body.theme-ink .nav-panel a:hover { background: rgba(244, 243, 239, .07); }
body.theme-ink .nav-panel a small { color: rgba(244, 243, 239, .55); }
body.theme-ink .nav-burger .bar { background: var(--paper); }
body.theme-ink .nav-sheet { background: var(--ink); color: var(--paper); }
body.theme-ink .nav-sheet .sheet-group { border-color: rgba(244, 243, 239, .18); }
body.theme-ink .nav-sheet .sheet-group h3 { color: rgba(244, 243, 239, .55); }
body.theme-ink .nav-sheet .sheet-group a { color: var(--paper); }
body.theme-ink .nav-sheet .btn--ghost { color: var(--paper); border-color: rgba(244, 243, 239, .3); }
body.theme-ink .chapter--ink { padding-block: calc(var(--gap-chapter) / 2.4); }
body.theme-ink .footnotes-sec,
body.theme-ink .site-footer {
  --bg: var(--ink);
  --fg: var(--paper);
  --muted: rgba(244, 243, 239, .65);
  --hairline: rgba(244, 243, 239, .18);
  background: var(--bg);
  color: var(--fg);
}
body.theme-ink ::selection { background: var(--red); color: #fff; }

/* ── FAQ-Zielgruppen-Filter (/hilfe) ──────────────────────────────────── */
.faq-filter { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 32px; }
.filter-chip {
  font: 600 13px/1 var(--mono);
  color: var(--muted);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 10px 18px;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}
.filter-chip:hover { border-color: var(--fg); color: var(--fg); }
.filter-chip.on { background: var(--ink); border-color: var(--ink); color: var(--paper); }

/* ── prefers-reduced-motion: alles steht (§1.7) ───────────────────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .logo .cur { animation: none !important; opacity: 1; }
}