/* Abschnitt 3 „Was wir bauen“: drei Teile im Wechsel (ERP, KI).
   Kein Sticky für den Abschnitt selbst. Nur die Übersichtskarte aus Abschnitt 2 bleibt beim Übergang kurz stehen
   (.bn-ride, CSS sticky) und gleitet in das Bild von Teil 1. bauen.js setzt nur transform, opacity und Klassen.
   Ohne JS oder mit „Bewegung reduzieren“: ruhiger Endzustand. */

.bn{position:relative;z-index:2;--gut:clamp(20px,5.2vw,84px);--col:min(440px,34vw);
  padding:clamp(28px,4vw,56px) var(--gut) clamp(110px,13vw,190px);overflow-x:clip}

/* ---------- Kopf ---------- */
.bn-head{max-width:var(--col)}
.bn-eyebrow{margin:0 0 14px;font-size:12px;font-weight:600;letter-spacing:.17em;text-transform:uppercase;color:#16479e}
.bn-head h2{margin:0;font-size:clamp(34px,3.3vw,50px);font-weight:600;line-height:1.08;letter-spacing:.002em;text-wrap:balance}

/* ---------- Teile ---------- */
.bn-part{display:grid;grid-template-columns:var(--col) minmax(0,1fr);column-gap:clamp(40px,6vw,110px);align-items:center;
  margin-top:clamp(90px,11vw,170px)}
.bn-head+.bn-part{margin-top:clamp(56px,6vw,96px)}
.bn-part.flip{grid-template-columns:minmax(0,1fr) var(--col)}
.bn-part.flip .bn-text{order:2}
.bn-kick{margin:0 0 14px;font-size:12px;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:#16479e}
.bn-text h3{margin:0;font-size:clamp(30px,2.75vw,42px);font-weight:600;line-height:1.1;letter-spacing:.002em}
.bn-text p:not(.bn-kick){margin:16px 0 0;font-size:18px;line-height:1.55;color:#26344a;max-width:24em}
.bn-text .bn-lead{color:var(--ink);font-weight:500}
.bn-text .bn-lead+p{margin-top:6px}
.bn-fig{position:relative;min-width:0;display:flex;justify-content:center}

/* ---------- Teil 1: Übersichtskarte, ringsum die Werkzeuge ---------- */
.bn-fig-erp{min-height:var(--fh,420px)}
.erp{position:relative;flex:none;width:var(--gw);height:var(--gh);transform-origin:0 0}
.erp .ov{position:absolute;left:var(--cl);top:var(--ct);z-index:2;width:var(--cw)}
/* Kleinere Karte wie in Abschnitt 2 auf dem Handy */
.erp[data-m="stack"] .ov{padding:16px 18px 12px}
.erp[data-m="stack"] .ov h3{font-size:17.5px;margin-bottom:8px}
.erp[data-m="stack"] .ov-row{grid-template-columns:36px minmax(0,1fr) auto;column-gap:11px;padding:9px 0}
.erp[data-m="stack"] .ov-row::before{left:-18px;right:-18px}
.erp[data-m="stack"] .ov-ic{width:36px;height:36px;border-radius:10px}
.erp[data-m="stack"] .ov-ic svg{width:30px;height:30px}
.erp[data-m="stack"] .ov-main b{font-size:14.5px}
.erp[data-m="stack"] .ov-n{display:none}
.erp[data-m="stack"] .ov-foot{padding-top:10px}

.erp-tools{position:absolute;inset:0;z-index:1;pointer-events:none}
.erp-lines{position:absolute;left:0;top:0;overflow:visible}
.erp-lines path{fill:none;stroke:#c9d2de;stroke-width:1.3;stroke-linecap:round;opacity:0;transition:opacity .7s ease}
.erp-lines circle{fill:#fff;stroke:#c9d2de;stroke-width:1.3;opacity:0;transition:opacity .5s ease}
.tool{position:absolute;left:0;top:0;width:120px;margin-left:-60px;display:flex;flex-direction:column;align-items:center;gap:8px;
  opacity:0;transform:translate3d(var(--x),var(--y),0) scale(.86);transition:opacity .5s ease,transform .7s var(--ease)}
.tool.up{flex-direction:column-reverse}
.tool .tile{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;flex:none}
.tool .tile i{width:32px;height:32px;border-radius:10px;display:grid;place-items:center;background:var(--c)}
.tool .tile svg{width:19px;height:19px;display:block}
.tool b{font-size:12.5px;font-weight:500;color:#3c4a5e;line-height:1.25;text-align:center;letter-spacing:.01em;max-width:104px;hyphens:manual}
.erp-dot{position:absolute;left:0;top:0;width:8px;height:8px;margin:-4px 0 0 -4px;border-radius:50%;background:var(--c);opacity:0;z-index:3;
  box-shadow:0 0 0 3px color-mix(in srgb,var(--c) 22%,transparent),0 0 12px 2px color-mix(in srgb,var(--c) 40%,transparent);will-change:transform,opacity}
.erp.go .tool{opacity:1;transform:translate3d(var(--x),var(--y),0);transition-delay:calc(var(--i) * 90ms)}
.erp.go .erp-lines path,.erp.go .erp-lines circle{opacity:1;transition-delay:calc(200ms + var(--i) * 90ms)}
.erp.end .tool,.erp.end .erp-lines path,.erp.end .erp-lines circle{transition:none}
.erp[data-m="stack"] .tool .tile{width:46px;height:46px;border-radius:14px}
.erp[data-m="stack"] .tool .tile i{width:28px;height:28px;border-radius:9px}
.erp[data-m="stack"] .tool .tile svg{width:17px;height:17px}
.erp[data-m="stack"] .tool b{font-size:11.5px;max-width:96px}

/* Übergang: Schiene über dem Abschnitt, auf der die Karte kurz stehen bleibt */
.bn-rail{position:absolute;left:0;right:0;top:var(--rt,0);height:var(--rh,0);pointer-events:none;display:none}
.bn.carry .bn-rail{display:block}
.bn-ride{position:sticky;top:var(--st,0);height:var(--gh,0);visibility:hidden}
.bn.carry.ride .bn-ride{visibility:visible}
.bn-ride .erp{position:absolute;left:var(--gx,0);top:0;will-change:transform}
.stand .ov.bn-gone{visibility:hidden}
/* Kopie im Übergang: dieselben Zustandsregeln wie die Karte in Abschnitt 2 (stand.css, .stand.on) */
.ov.mir .ov-sk{display:block;transition:opacity .35s ease}
.ov.mir .ov-txt{opacity:0;transition:opacity .45s ease}
.ov.mir .ov-row.has .ov-txt{opacity:1}
.ov.mir .ov-row.has .ov-sk{opacity:0}
.ov.mir .dots i{background:#fff;box-shadow:inset 0 0 0 1.4px #cfd7e2;transition:background .3s ease,box-shadow .3s ease}
.ov.mir .dots i.lit{background:var(--c);box-shadow:none}

/* ---------- Teil 2: KI, die mitliest ---------- */
.ki{position:relative;width:min(100%,600px);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;align-items:start}
.ki .pp{position:relative}
.ki .kick{margin:0 0 8px;font-size:11px;font-weight:600;letter-spacing:.15em;text-transform:uppercase;color:#16479e}
.ki-wa{grid-column:1;grid-row:1;z-index:2}
.ki-wa .bub{width:auto;min-width:214px}
.ki-wa .mk{position:relative;display:inline-block;z-index:0}
.ki-wa .mk::before{content:"";position:absolute;left:-3px;right:-3px;top:1px;bottom:-1px;z-index:-1;border-radius:4px;
  background:linear-gradient(90deg,rgba(18,192,142,.32),rgba(20,160,165,.26) 55%,rgba(24,102,204,.2));transform-origin:0 50%}
.ki-tag{display:inline-flex;align-items:center;gap:6px;margin-top:10px;padding:5px 10px 5px 7px;border-radius:999px;background:#f2f6fb;
  font-size:12px;font-weight:500;color:#26344a;box-shadow:inset 0 0 0 1px rgba(15,27,45,.05)}
.ki-tag svg{width:14px;height:14px}
.ki-obj{grid-column:1;grid-row:2;padding:14px 18px 6px;border-radius:16px}
.ki-row{display:grid;grid-template-columns:40px minmax(0,1fr);align-items:center;column-gap:12px;padding:10px 0 12px;border-top:1px solid var(--line);position:relative}
.ki-row::before{content:"";position:absolute;top:0;bottom:0;left:-18px;right:-18px;background:linear-gradient(90deg,rgba(20,160,165,.1),rgba(31,109,255,.05));opacity:0;pointer-events:none}
.ki-main{display:flex;flex-direction:column;gap:3px;min-width:0}
.ki-main b{font-size:15px;font-weight:500;white-space:nowrap}
.ki-st{font-size:13px;color:var(--slate);white-space:nowrap}
.sw{display:inline-grid;vertical-align:bottom;overflow:hidden;line-height:1.35;padding:0 1px}
.sw>span{grid-area:1/1;transition:transform .55s var(--ease),opacity .45s ease}
.sw .n{color:#0a9a72;font-weight:600}
.ki-obj .ki-src{position:absolute;right:2px;top:16px}
.ki-src{display:inline-flex;align-items:center;gap:5px;font-size:11px;color:var(--gray);white-space:nowrap}
.ki-src i{width:6px;height:6px;border-radius:50%;background:var(--c,#25b863);display:block}
.ki-src i{position:relative}
.ki-src.hit i::after{content:"";position:absolute;inset:-5px;border-radius:50%;border:2px solid var(--c,#25b863);animation:dothit 1s ease-out forwards}
.ki-mail{grid-column:2;grid-row:1/3;padding:16px 18px 18px;border-radius:16px}
.ki-to{margin:0;font-size:16px;font-weight:600}
.ki-txt{margin:10px 0 16px;font-size:14.5px;line-height:1.55;color:#26344a;min-height:6.2em;text-wrap:pretty}
.ki-txt .w{transition:opacity .35s ease}
.ki-btn{position:relative;display:inline-grid;font-size:14px;font-weight:600;border-radius:999px}
.ki-btn>span{grid-area:1/1;display:flex;align-items:center;justify-content:center;gap:6px;padding:9px 20px;border-radius:999px;transition:opacity .35s ease}
.ki-btn .b0{box-shadow:inset 0 0 0 1.5px var(--ink);background:#fff}
.ki-btn .b1{background:var(--ink);color:#fff;opacity:0}
.ki-btn svg{width:15px;height:15px}
.ki-ask{grid-column:1/-1;grid-row:3;padding:12px 12px 14px;border-radius:16px}
.ki-q{position:relative;display:flex;align-items:center;gap:10px;min-height:44px;padding:6px 6px 6px 16px;border-radius:12px;background:#f5f8fc;
  box-shadow:inset 0 0 0 1px #e3e9f1;font-size:14.5px}
.ki-ph{position:absolute;left:16px;color:#9aa6b6;transition:opacity .3s ease}
.ki-qt{flex:1;min-width:0;white-space:nowrap;color:var(--ink)}
.ki-qt .c{transition:opacity .12s linear}
.ki-send{width:32px;height:32px;border-radius:50%;background:var(--blue);display:grid;place-items:center;flex:none;transition:transform .3s var(--ease)}
.ki-send svg{width:15px;height:15px}
.ki-a{display:flex;align-items:center;gap:10px;padding:12px 6px 0 4px;font-size:15px}
.ki-a b{font-weight:600}
.ki-a .ki-src{margin-left:auto}
.ki-av{width:26px;height:26px;border-radius:9px;display:grid;place-items:center;flex:none;background:linear-gradient(135deg,var(--g),var(--t) 50%,var(--b))}
.ki-av svg{width:14px;height:14px}
.ki-a{transition:opacity .5s ease,transform .6s var(--ease)}
.ki-dot{position:absolute;left:0;top:0;width:10px;height:10px;margin:-5px 0 0 -5px;border-radius:50%;background:#25b863;z-index:5;opacity:0;pointer-events:none;
  box-shadow:0 0 0 4px rgba(37,184,99,.22),0 0 14px 2px rgba(37,184,99,.42)}

/* Abfolge: .pre = Anfang, .play = läuft (Zeiten in ms ab Start), ohne Klasse = Endzustand */
.ki.pre .ki-wa,.ki.pre .ki-mail{opacity:0;transform:translateY(14px)}
.ki.pre .ki-ask{opacity:0;transform:translateY(10px)}
.ki.pre .mk::before{transform:scaleX(0)}
.ki.pre .ki-tag{opacity:0;transform:translateY(-4px) scale(.94)}
.ki.pre .sw .n{transform:translateY(105%);opacity:0}
.ki.pre .ki-txt .w{opacity:0}
.ki.pre .ki-qt .c{opacity:0}
.ki.pre .ki-a{opacity:0;transform:translateY(8px)}
.ki:not(.pre) .ki-ph{opacity:0}
.ki:not(.pre) .sw .o{transform:translateY(-105%);opacity:0}
.ki:not(.pre) .ki-btn .b1{opacity:1}
.ki:not(.pre) .ki-btn .b0{opacity:0}
.ki .ki-wa,.ki .ki-mail,.ki .ki-ask{transition:opacity .6s ease,transform .8s var(--ease)}
.ki .mk::before{transition:transform .8s cubic-bezier(.45,0,.2,1)}
.ki .ki-tag{transition:opacity .4s ease,transform .5s var(--ease)}
.ki.play .ki-wa{transition-delay:0ms}
.ki.play .mk::before{transition-delay:750ms}
.ki.play .ki-tag{transition-delay:1350ms}
.ki.play .sw>span{transition-delay:2350ms}
.ki.play .ki-mail{transition-delay:2900ms}
.ki.play .ki-txt .w{transition-delay:calc(3350ms + var(--i) * 75ms)}
.ki.play .ki-btn>span{transition-delay:5000ms}
.ki.play .ki-ask{transition-delay:5300ms}
.ki.play .ki-ph{transition-delay:5750ms}
.ki.play .ki-qt .c{transition-delay:calc(5800ms + var(--i) * 24ms)}
.ki.play .ki-a{transition-delay:7000ms}
.ki .ki-row.ping::before{animation:ovping 1.4s ease}
.ki-btn.press{animation:kipress .5s var(--ease)}
.ki-send.press{animation:kipress .45s var(--ease)}
@keyframes kipress{0%{transform:scale(1)}35%{transform:scale(.94)}100%{transform:scale(1)}}
.ki.end *{transition:none!important}

/* ---------- Schmal: untereinander, Text oben, Bild darunter ---------- */
@media (max-width:899px){
  .bn{padding-top:28px;--col:100%}
  .bn-head{max-width:none;text-align:center}
  .bn-eyebrow{font-size:11px;letter-spacing:.14em;margin-bottom:10px}
  .bn-head h2{font-size:clamp(28px,8vw,36px)}
  .bn-part,.bn-part.flip{grid-template-columns:minmax(0,1fr);row-gap:30px;margin-top:clamp(84px,20vw,120px)}
  .bn-head+.bn-part{margin-top:48px}
  .bn-part.flip .bn-text{order:0}
  .bn-text{text-align:center}
  .bn-kick{font-size:11px;margin-bottom:10px}
  .bn-text h3{font-size:clamp(26px,7.4vw,31px)}
  .bn-text p:not(.bn-kick){font-size:16px;line-height:1.5;margin-left:auto;margin-right:auto;max-width:23em}
  .bn-text .bn-lead+p{margin-top:4px}
  .ki{grid-template-columns:minmax(0,1fr);gap:12px;width:min(100%,420px)}
  .ki-wa,.ki-obj,.ki-mail,.ki-ask{grid-column:1;grid-row:auto}
  .ki-wa{justify-self:stretch}
  .ki-txt{min-height:0}
}
@media (max-width:520px){
  .ki-wa .bub{min-width:0}
  .ki-q{font-size:14px}
  .ki-a{font-size:14px}
  .ki-a .ki-src{display:none}
}

@media (prefers-reduced-motion:reduce){
  .tool,.erp-lines path,.erp-lines circle,.ki *{transition:none!important}
}