/* =========================================================
   SCREENWORK / BOOKSHELF / FINAL TUNED CSS
   Stand: Ratio korrekt, Regal optisch feinjustiert
   ========================================================= */

/* ---------------------------------
   Regal-Container
--------------------------------- */
.sw-bookshelf{
  --sw-shelf-gap-col: 22px;
  --sw-shelf-gap-row: 34px;

  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));

  width: 85%;
  margin-left: auto;
  margin-right: auto;

  column-gap: var(--sw-shelf-gap-col);
  row-gap: var(--sw-shelf-gap-row);
  align-items: end;

  overflow: visible !important;
}
.sw-bookshelf--cols-3{
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sw-bookshelf--cols-2{
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sw-bookshelf--cols-1{
  grid-template-columns: 1fr;
}

/* ---------------------------------
   Regalzelle / Regalboden
--------------------------------- */
.bookshelf-item{
  position: relative;
  min-width: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0 0px 0px;
  overflow: visible !important;
}

.bookshelf-item::after{
  content: "";
  position: absolute;
  left: -6px;
  right: -6px;
  bottom: 0;
  height: 14px;
  border-radius: 2px;

  background:
    linear-gradient(
      to bottom,
      rgba(255,255,255,.16) 0%,
      rgba(255,255,255,.05) 16%,
      rgba(39,24,15,.96) 17%,
      rgba(91,61,37,.98) 58%,
      rgba(24,14,9,1) 100%
    );

  box-shadow:
    0 1px 0 rgba(255,255,255,.06) inset,
    0 5px 10px rgba(0,0,0,.20);

  z-index: 1;
  pointer-events: none;
}

.bookshelf-item__inner{
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  position: relative;
  z-index: 2;
  overflow: visible !important;
}

/* ---------------------------------
   Buch-Wrapper
--------------------------------- */
.sw-bookfan-wrap{
  --cover-open: -34deg;
  --book-max-w: 265px;

  width: 100%;
  min-height: 0;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  padding: 14px 8px 12px;

  perspective: 1500px;
  perspective-origin: 50% 50%;
  overflow: visible !important;
}

.sw-bookfan{
  position: relative;
  width: min(100%, var(--book-max-w));
  height: auto;
  transform-style: preserve-3d;
  overflow: visible !important;
}

/* ---------------------------------
   Rückseite / Buchblock
--------------------------------- */
.sw-bookfan__back{
  position: absolute;
  top: 5px;
  left: 12px;
  right: -8px;
  bottom: -5px;
border-radius: 5px;

  background: linear-gradient(180deg, #ddd7cf, #c8c1b7, #b3aca2);
  transform: translateZ(-34px);

  box-shadow:
    0 0 0 1px rgba(0,0,0,.06),
    10px 0 18px rgba(0,0,0,.16),
    inset 0 0 14px rgba(0,0,0,.06);

  z-index: 1;
  contain: paint;
}

/* ---------------------------------
   Seitenblock
--------------------------------- */
.sw-bookfan__pages{
  position: absolute;
  inset: 0;
  z-index: 3;
  transform-style: preserve-3d;
  pointer-events: none;
}

.sw-bookfan__page{
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #ffffff, #f5f5f3);
  transform-origin: left center;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;

  contain: paint;
  will-change: transform;

  transition:
    transform .7s cubic-bezier(.2,.8,.2,1),
    box-shadow .7s cubic-bezier(.2,.8,.2,1);
}

.sw-bookfan__page::before{
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #fff 0%, #f9f9f7 100%);
}

.sw-bookfan__page::after{
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 16px;
  height: 100%;
  background: linear-gradient(
    -90deg,
    rgba(255,255,255,.05) 0%,
    rgba(216,216,216,.42) 15%,
    rgba(168,168,168,.58) 100%
  );
}

/* Ruhestellung – feiner als vorher */
.sw-bookfan__page.p1{ transform: translate3d(2px,0,-6px) rotateY(0deg) scale(1); }
.sw-bookfan__page.p2{ transform: translate3d(4px,0,-12px) rotateY(0deg) scale(1); }
.sw-bookfan__page.p3{ transform: translate3d(6px,0,-18px) rotateY(0deg) scale(1); }
.sw-bookfan__page.p4{ transform: translate3d(8px,0,-24px) rotateY(0deg) scale(1); }
.sw-bookfan__page.p5{ transform: translate3d(10px,0,-30px) rotateY(0deg) scale(1); }
.sw-bookfan__page.p6{ transform: translate3d(12px,0,-36px) rotateY(0deg) scale(1); }

/* Hover / Open */
.sw-bookfan-wrap:hover .sw-bookfan__cover{
  transform:
    translate3d(-4px, 0, 10px)
    rotateY(var(--cover-open));
  box-shadow:
    18px 14px 28px rgba(0,0,0,.18),
    4px 2px 6px rgba(0,0,0,.08);
}

.sw-bookfan-wrap:hover .sw-bookfan__gloss{
  opacity: .88;
  filter: blur(.6px);
  transform: translateX(34%) skewX(-12deg) scaleX(1.06);
}

/* Pages öffnen sich gestaffelt */
/* Pages öffnen sich gestaffelt — perspektivisch korrekt */

/* Pages öffnen sich gestaffelt — Vorderseiten gross, Hinterseiten kleiner */

/* Pages öffnen sich gestaffelt — Vorderseiten deutlich grösser */

/* Pages öffnen sich gestaffelt — vorne gross, hinten kleiner */

/* Pages öffnen sich gestaffelt — vorne höher, hinten tiefer */

/* Pages öffnen sich gestaffelt — vorne höher, hinten tiefer */

.sw-bookfan-wrap:hover .sw-bookfan__page.p1{
  top: 20px;
  left: 30px;
  width: calc(var(--book-w) - 60px);
  height: calc(var(--book-h) - 100px);
  transform: translate3d(0,0,-10px) rotateY(-6deg);
border-radius: 5px;
}

.sw-bookfan-wrap:hover .sw-bookfan__page.p2{
  top: 16px;
  left: 24px;
  width: calc(var(--book-w) - 46px);
  height: calc(var(--book-h) - 78px);
  transform: translate3d(0,0,-20px) rotateY(-10deg);
border-radius: 5px;
}

.sw-bookfan-wrap:hover .sw-bookfan__page.p3{
  top: 12px;
  left: 18px;
  width: calc(var(--book-w) - 32px);
  height: calc(var(--book-h) - 56px);
  transform: translate3d(0,0,-30px) rotateY(-14deg);
border-radius: 5px;
}

.sw-bookfan-wrap:hover .sw-bookfan__page.p4{
  top: 8px;
  left: 12px;
  width: calc(var(--book-w) - 18px);
  height: calc(var(--book-h) - 36px);
  transform: translate3d(0,0,-40px) rotateY(-18deg);
border-radius: 5px;
}

.sw-bookfan-wrap:hover .sw-bookfan__page.p5{
  top: 4px;
  left: 6px;
  width: calc(var(--book-w) - 8px);
  height: calc(var(--book-h) - 18px);
  transform: translate3d(0,0,-50px) rotateY(-22deg);
border-radius: 5px;
}

.sw-bookfan-wrap:hover .sw-bookfan__page.p6{
  top: 0px;
  left: 0px;
  width: calc(var(--book-w) - 2px);
  height: calc(var(--book-h) - 2px);
  transform: translate3d(0,0,-60px) rotateY(-26deg);
border-radius: 5px;
}

.sw-bookfan__page.p1{ transition-delay: 0ms; }
.sw-bookfan__page.p2{ transition-delay: 20ms; }
.sw-bookfan__page.p3{ transition-delay: 40ms; }
.sw-bookfan__page.p4{ transition-delay: 60ms; }
.sw-bookfan__page.p5{ transition-delay: 80ms; }
.sw-bookfan__page.p6{ transition-delay: 100ms; }

/* ---------------------------------
   Cover
--------------------------------- */
.sw-bookfan__cover{
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  z-index: 20;
  border-radius: 5px;
  overflow: hidden;

  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;

  transform-origin: left center;
  transform-style: preserve-3d;
  backface-visibility: hidden;

  contain: paint;
  will-change: transform;

  box-shadow:
    0 8px 18px rgba(0,0,0,.15),
    0 2px 4px rgba(0,0,0,.06);

  transition:
    transform 700ms cubic-bezier(.22,.72,.18,1),
    box-shadow 700ms cubic-bezier(.22,.72,.18,1),
    filter 700ms cubic-bezier(.22,.72,.18,1);
}

.sw-bookfan__img{
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
  user-select: none;
  -webkit-user-drag: none;
}

.sw-bookfan__cover::after{
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 8px;
  height: 100%;
  background: linear-gradient(
    90deg,
    rgba(255,255,255,0) 0%,
    rgba(0,0,0,.06) 100%
  );
}

.sw-bookfan__gloss{
  position: absolute;
  inset: -6% -14%;
  pointer-events: none;

  background: linear-gradient(
    104deg,
    rgba(255,255,255,0) 0%,
    rgba(255,255,255,0) 38%,
    rgba(255,255,255,.08) 46%,
    rgba(255,255,255,.52) 52%,
    rgba(255,255,255,.82) 56%,
    rgba(255,255,255,.30) 60%,
    rgba(255,255,255,.06) 66%,
    rgba(255,255,255,0) 74%,
    rgba(255,255,255,0) 100%
  );

  mix-blend-mode: screen;
  filter: blur(1px);
  opacity: .28;

  transform: translateX(-38%) skewX(-10deg) scaleX(.92);
  transition:
    transform 700ms cubic-bezier(.22,.72,.18,1),
    opacity 700ms cubic-bezier(.22,.72,.18,1),
    filter 700ms cubic-bezier(.22,.72,.18,1);
}

.sw-bookfan-wrap:hover .sw-bookfan__cover,
.sw-bookfan.is-open .sw-bookfan__cover{
  transform: translate3d(-3px,0,8px) rotateY(var(--cover-open));
  box-shadow:
    12px 10px 20px rgba(0,0,0,.16),
    3px 2px 5px rgba(0,0,0,.07);
}

.sw-bookfan-wrap:hover .sw-bookfan__gloss,
.sw-bookfan.is-open .sw-bookfan__gloss{
  opacity: .72;
  filter: blur(.6px);
  transform: translateX(30%) skewX(-12deg) scaleX(1.03);
}

/* ---------------------------------
   Meta optional
--------------------------------- */
.bookshelf-item__meta{
  width: min(100%, 280px);
  text-align: center;
  margin-top: 8px;
}

.bookshelf-item__title{
  font-size: 1rem;
  line-height: 1.25;
}

.bookshelf-item__author{
  font-size: .9rem;
  opacity: .8;
}

.bookshelf-item__link a{
  display: inline-block;
  margin-top: 8px;
}

/* ---------------------------------
   Schutz gegen Abschneiden
--------------------------------- */
.sw-bookshelf,
.sw-bookshelf > *,
.bookshelf-item,
.bookshelf-item__inner,
.bookshelf-item .sw-bookfan-wrap,
.bookshelf-item .sw-bookfan,
.bookshelf-item .sw-bookfan__cover,
.bookshelf-item .sw-bookfan__pages{
  overflow: visible !important;
}

/* ---------------------------------
   Responsive
--------------------------------- */
@media (max-width: 1400px){
  .sw-bookshelf:not(.sw-bookshelf--cols-1):not(.sw-bookshelf--cols-2){
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .sw-bookfan-wrap{
    --book-max-w: 250px;
  }
}

@media (max-width: 960px){
  .sw-bookshelf{
    grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  }

  .sw-bookfan-wrap{
    --book-max-w: 220px;
    padding: 12px 10px 12px;
  }
}

@media (max-width: 640px){
  .sw-bookshelf{
    grid-template-columns: 1fr !important;
  }

  .sw-bookfan-wrap{
    --book-max-w: 260px;
    padding: 14px 10px 12px;
  }

  .sw-bookfan__back{
    left: 12px;
    transform: translateZ(-28px);
    border-radius: 5px;
  }

  .sw-bookfan__page.p1{ transform: translate3d(2px,0,-5px) rotateY(0deg) scale(1); }
  .sw-bookfan__page.p2{ transform: translate3d(4px,0,-10px) rotateY(0deg) scale(1); }
  .sw-bookfan__page.p3{ transform: translate3d(6px,0,-15px) rotateY(0deg) scale(1); }
  .sw-bookfan__page.p4{ transform: translate3d(8px,0,-20px) rotateY(0deg) scale(1); }
  .sw-bookfan__page.p5{ transform: translate3d(10px,0,-25px) rotateY(0deg) scale(1); }
  .sw-bookfan__page.p6{ transform: translate3d(12px,0,-30px) rotateY(0deg) scale(1); }

  .sw-bookfan-wrap:hover .sw-bookfan__page.p1,
  .sw-bookfan.is-open .sw-bookfan__page.p1{ transform: translate3d(16px,12px,-5px) rotateY(-6deg) scale(.88); }
  .sw-bookfan-wrap:hover .sw-bookfan__page.p2,
  .sw-bookfan.is-open .sw-bookfan__page.p2{ transform: translate3d(13px,10px,-10px) rotateY(-10deg) scale(.91); }
  .sw-bookfan-wrap:hover .sw-bookfan__page.p3,
  .sw-bookfan.is-open .sw-bookfan__page.p3{ transform: translate3d(10px,7px,-15px) rotateY(-14deg) scale(.94); }
  .sw-bookfan-wrap:hover .sw-bookfan__page.p4,
  .sw-bookfan.is-open .sw-bookfan__page.p4{ transform: translate3d(7px,5px,-20px) rotateY(-18deg) scale(.97); }
  .sw-bookfan-wrap:hover .sw-bookfan__page.p5,
  .sw-bookfan.is-open .sw-bookfan__page.p5{ transform: translate3d(4px,3px,-25px) rotateY(-22deg) scale(.99); }
  .sw-bookfan-wrap:hover .sw-bookfan__page.p6,
  .sw-bookfan.is-open .sw-bookfan__page.p6{ transform: translate3d(0,0,-30px) rotateY(-26deg) scale(1); }
}