/* ============================================================
   Tasty Studios — Dokumenten-Fahrt + Buchansicht
   Portiert aus der GBR-Mappe-Seite (bewährter Stand 14.08.2026),
   umgefärbt auf die Tasty-Palette. Logik unverändert.
   ============================================================ */

:root{
  --f-schrift:#ece8e0;
  --f-leise:#8f897f;
  --f-akzent:#b0a68e;
  --f-akzent-hell:#ebdbce;
  --f-sand:#9e947f;
  --f-linie:rgba(176,166,142,.22);
}

html.hat-fahrt{scroll-snap-type:y proximity;}

/* ---------- Die Fahrt ---------- */
.fahrt{position:relative;z-index:1;}
.raste{position:absolute;left:0;width:1px;scroll-snap-align:start;pointer-events:none;}
.buehne{position:fixed;inset:0;overflow:hidden;z-index:60;background:#0C0D12;opacity:0;pointer-events:none;}
.buehne.aus{visibility:hidden;}

.emblem{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:min(46vh,420px);height:auto;opacity:.10;z-index:0;pointer-events:none;
}
.szene{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;z-index:1;}
.spur{position:relative;width:0;height:0;transform-style:preserve-3d;will-change:transform;}

.karte{
  position:absolute;display:block;text-decoration:none;cursor:pointer;
  transform-style:preserve-3d;background:#fff;
  box-shadow:0 25px 50px -12px rgba(0,0,0,.75);
  will-change:transform,opacity;
}
.karte img{width:100%;height:100%;object-fit:cover;}
.karte .nummer{
  position:absolute;top:-26px;left:0;font-family:var(--text);font-size:11px;
  letter-spacing:.18em;color:rgba(255,255,255,.55);
}

/* Links im freien Raum: der Name des Dokuments, über das gefahren wird */
.tafel{
  position:absolute;left:10vw;top:15vh;z-index:50;pointer-events:none;
  width:min(28vw,440px);text-align:center;
}
.tafel-emblem{
  display:block;width:110px;height:auto;margin:0 auto 22px;
  opacity:0;transform:translateY(30px);
}
.tafel.sichtbar .tafel-emblem{
  opacity:.9;transform:none;
  transition:opacity 1.1s cubic-bezier(.22,.61,.36,1), transform 1.1s cubic-bezier(.22,.61,.36,1);
}
.tafel .titel{
  font-family:var(--display);font-weight:500;
  font-size:clamp(1.5rem,2.4vw,2.5rem);line-height:1.18;letter-spacing:.14em;
  text-transform:uppercase;
  color:#fff;
  opacity:0;transform:translateY(30px);
  transition:opacity .7s cubic-bezier(.22,.61,.36,1), transform .7s cubic-bezier(.22,.61,.36,1);
}
.tafel .inhalt{
  list-style:none;margin-top:24px;display:inline-block;text-align:left;padding:0;
  opacity:0;transform:translateY(30px);
  transition:opacity .7s cubic-bezier(.22,.61,.36,1) .08s, transform .7s cubic-bezier(.22,.61,.36,1) .08s;
}
.tafel .inhalt li{
  position:relative;padding-left:20px;margin-top:10px;
  font-size:14.5px;line-height:1.5;color:rgba(255,255,255,.82);
}
.tafel .inhalt li::before{
  content:'';position:absolute;left:0;top:.72em;width:9px;height:1px;background:var(--f-akzent);
}
.tafel .art{
  font-family:var(--text);font-size:11px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--f-akzent);margin-top:22px;
  opacity:0;transform:translateY(16px);
  transition:opacity .7s cubic-bezier(.22,.61,.36,1) .14s, transform .7s cubic-bezier(.22,.61,.36,1) .14s;
}
.tafel .warten{
  position:absolute;top:130px;left:0;width:100%;
  font-family:var(--display);font-size:clamp(1.2rem,1.8vw,1.5rem);
  color:rgba(255,255,255,.38);
  transition:opacity .5s ease;
}
.tafel.sichtbar .titel,.tafel.sichtbar .inhalt,.tafel.sichtbar .art{opacity:1;transform:translateY(0);}
.tafel.reset .titel,.tafel.reset .inhalt,.tafel.reset .art,.tafel.reset .tafel-emblem{transition:none !important;}
.tafel.sichtbar .warten{opacity:0;}

.surf-hinweis{
  position:absolute;bottom:3vw;right:3vw;z-index:50;
  font-family:var(--text);font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:rgba(255,255,255,.6);
}

/* Liste statt Fahrt — Handy / Geräte ohne Maus */
.liste{display:none;}

/* ═══ Gebundene Mappe: Rücken und Blockdicke auf jeder Karte ═══ */
.karte .ruecken{
  position:absolute;left:0;top:0;width:26px;height:100%;
  background:linear-gradient(90deg,#171a2c 0%,#252a45 42%,#1b1f33 100%);
  transform:translateZ(0.5px);
  box-shadow:inset -1px 0 0 rgba(0,0,0,.5), inset 1px 0 0 rgba(255,255,255,.06);
}
.karte .ruecken img{
  width:15px;height:auto;margin:14px auto 0;opacity:.9;display:block;
}

/* ═══ Buchansicht ═══ */
.buch{position:fixed;inset:0;z-index:200;visibility:hidden;}
.buch.an{visibility:visible;}
.buch-grund{
  position:absolute;inset:0;z-index:0;background:#0a0c14;
  opacity:0;transition:opacity .95s cubic-bezier(.22,.61,.36,1);
}
.buch.an .buch-grund{opacity:1;}
.buch-kopf,.buch-fuss{opacity:0;transition:opacity .7s ease .3s;}
.buch.an .buch-kopf,.buch.an .buch-fuss{opacity:1;}
.buch.an{visibility:visible;opacity:1;transition:opacity .7s ease, visibility 0s;}
.buch-grund::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(120% 100% at 50% 45%, rgba(17,20,33,.35) 0%, rgba(10,12,20,.75) 55%, rgba(4,5,9,.96) 100%);
}
.buch-buehne{z-index:1;}
.buch-kopf,.buch-fuss,.buch-pfeil{z-index:9;}
.buch-koerper{transform-style:preserve-3d;}
.seite{transform-style:flat;backface-visibility:hidden;}
.buch-kopf{
  position:absolute;top:0;left:0;right:0;height:74px;z-index:6;
  display:flex;align-items:center;justify-content:flex-end;padding:0 26px;
}
.buch-kopf .knopf{
  display:flex;align-items:center;gap:9px;
  background:none;border:1px solid var(--f-linie);border-radius:999px;
  color:var(--f-sand);font-family:var(--text);font-size:11px;letter-spacing:.16em;text-transform:uppercase;
  padding:10px 18px;cursor:pointer;text-decoration:none;
  transition:color .3s ease,border-color .3s ease;
}
.buch-kopf .knopf:hover{color:var(--f-akzent-hell);border-color:var(--f-akzent-hell);}
.buch-titel{
  position:absolute;left:50%;transform:translateX(-50%);
  font-family:var(--display);font-size:14px;letter-spacing:.2em;text-transform:uppercase;color:#fff;white-space:nowrap;
}
.buch-buehne{position:absolute;inset:74px 0 66px;display:flex;align-items:center;justify-content:center;perspective:2600px;}
.buch-koerper{
  position:relative;transform-style:preserve-3d;
  transition:transform .9s cubic-bezier(.22,.61,.36,1), opacity .5s ease;
}
.seite{
  position:absolute;top:0;background:transparent;overflow:hidden;
  box-shadow:0 30px 60px -24px rgba(0,0,0,.85);
}
.seite img{width:100%;height:100%;object-fit:contain;display:block;}
.seite.links{right:50%;}
.seite.rechts{left:50%;}
.deckel-ruecken{
  position:absolute;left:0;top:0;bottom:0;width:7.5%;z-index:2;
  background:linear-gradient(90deg,#171a2c 0%,#252a45 42%,#1b1f33 100%);
  box-shadow:inset -1px 0 0 rgba(0,0,0,.5), inset 1px 0 0 rgba(255,255,255,.06);
}
.deckel-ruecken img{display:block;width:52%;height:auto;margin:20px auto 0;opacity:.9;}

.buch-koerper::after{
  content:'';position:absolute;top:0;bottom:0;left:50%;width:76px;margin-left:-38px;
  pointer-events:none;z-index:3;
  background:linear-gradient(90deg, rgba(0,0,0,0) 0%, rgba(0,0,0,.14) 42%, rgba(0,0,0,.17) 50%, rgba(0,0,0,.14) 58%, rgba(0,0,0,0) 100%);
}
.buch-koerper.oben-gebunden::after,.buch-koerper.zu::after{display:none;}
.blatt-um .wurf{
  position:absolute;inset:0;pointer-events:none;background:#000;opacity:0;
}
@keyframes wurfschatten{
  0%{opacity:0;} 30%{opacity:.10;} 50%{opacity:.16;} 70%{opacity:.10;} 100%{opacity:0;}
}
.seite.leer{background:linear-gradient(90deg,#f2efe8,#fbf9f5);}
.seite.leer.links{background:linear-gradient(270deg,#f2efe8,#fbf9f5);}
.blatt-um{
  position:absolute;top:0;left:50%;transform-style:preserve-3d;
  transform-origin:left center;z-index:5;
}
@keyframes blattVorA{
  from {transform:translateZ(1.5px) rotateY(0deg);}
  to   {transform:translateZ(1.5px) rotateY(-90deg);}
}
@keyframes blattVorB{
  from {transform:translateZ(1.5px) rotateY(-90deg);}
  to   {transform:translateZ(1.5px) rotateY(-180deg);}
}
@keyframes blattZurueckA{
  from {transform:translateZ(1.5px) rotateY(-180deg);}
  to   {transform:translateZ(1.5px) rotateY(-90deg);}
}
@keyframes blattZurueckB{
  from {transform:translateZ(1.5px) rotateY(-90deg);}
  to   {transform:translateZ(1.5px) rotateY(0deg);}
}
@keyframes blattHochVorHalb{
  0%   {transform:translateZ(1.5px) rotateX(0deg);opacity:1;}
  82%  {opacity:1;}
  100% {transform:translateZ(1.5px) rotateX(97deg) translateZ(22px);opacity:0;}
}
@keyframes blattHochZurueckHalb{
  0%   {transform:translateZ(1.5px) rotateX(97deg) translateZ(22px);opacity:0;}
  18%  {opacity:1;}
  100% {transform:translateZ(1.5px) rotateX(0deg);opacity:1;}
}
.blatt-um.oben{left:0;top:0;transform-origin:center top;}
.blatt-um.schmal{left:0;transform-origin:left center;}
.buch-koerper.oben-gebunden .seite.rechts{left:0;border-left:none;}
.buch-koerper.oben-gebunden::before{
  content:'';position:absolute;left:6%;right:6%;top:-13px;height:9px;z-index:6;
  background:linear-gradient(180deg,#252a45,#141726);border-radius:3px 3px 0 0;
  box-shadow:0 2px 6px rgba(0,0,0,.6);
}
.blatt-um{box-shadow:0 18px 44px -26px rgba(0,0,0,.6);}
.blatt-um .blattbild{
  position:absolute;inset:0;background-repeat:no-repeat;
  background-size:100% 100%;
}
.blatt-um .blattbild.gedreht{transform:scaleX(-1);}
.blatt-um .flaeche{
  position:absolute;inset:0;backface-visibility:hidden;background:#fff;overflow:hidden;
  box-shadow:0 18px 40px -28px rgba(0,0,0,.55);
}
.blatt-um .hinten{transform:rotateY(180deg);}
.blatt-um .flaeche img{width:100%;height:100%;object-fit:contain;display:block;}
.buch-fuss{
  position:absolute;left:0;right:0;bottom:0;height:66px;z-index:6;
  display:flex;align-items:center;justify-content:center;gap:26px;
  font-family:var(--text);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--f-sand);
}
.buch-pfeil{
  position:absolute;top:50%;transform:translateY(-50%);z-index:7;
  width:52px;height:52px;border:1px solid var(--f-linie);border-radius:50%;
  background:rgba(0,0,0,.35);cursor:pointer;
  display:flex;align-items:center;justify-content:center;opacity:0;
  transition:opacity .7s ease .3s, border-color .3s ease, background .3s ease;
}
.buch.an .buch-pfeil{opacity:1;}
.buch-pfeil:hover{border-color:var(--f-akzent-hell);background:rgba(0,0,0,.6);}
.buch-pfeil::before{
  content:'';width:11px;height:11px;border-top:1px solid var(--f-akzent-hell);border-right:1px solid var(--f-akzent-hell);
}
.buch-pfeil.vor{right:26px;}
.buch-pfeil.vor::before{transform:rotate(45deg);margin-left:-4px;}
.buch-pfeil.zurueck{left:26px;}
.buch-pfeil.zurueck::before{transform:rotate(-135deg);margin-right:-4px;}
.buch-zaehler{font-variant-numeric:tabular-nums;}

@media (max-width:900px), (hover:none){
  .buch-kopf .knopf{font-size:10px;padding:8px 12px;}
  .buch-titel{display:none;}
  .buch-pfeil{width:42px;height:42px;}
  .buch-pfeil.vor{right:8px;} .buch-pfeil.zurueck{left:8px;}
}

@media (max-width:900px), (hover:none){
  html.hat-fahrt{scroll-snap-type:none;}
  .raste{display:none;}
  .fahrt{height:auto !important;}
  .buehne{display:none;}
  .liste{display:block;position:relative;z-index:2;padding:10px 0;}
  .liste .eintrag{display:block;text-decoration:none;padding:34px 0;border-top:1px solid var(--f-linie);cursor:pointer;}
  .liste .eintrag:first-child{border-top:none;}
  .liste .bild{width:100%;max-width:280px;background:#fff;box-shadow:0 22px 44px -22px rgba(0,0,0,.8);}
  .liste .bild.quer{max-width:440px;}
  .liste .eintrag-name{font-family:var(--display);font-weight:500;font-size:19px;margin-top:22px;letter-spacing:.12em;text-transform:uppercase;color:var(--fg-strong);}
  .liste .eintrag-art{font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--f-akzent);margin-top:8px;}
  .liste .eintrag-pfeil{font-size:13px;color:var(--f-akzent);letter-spacing:.06em;display:inline-block;margin-top:14px;}
}