:root{
  --bg: #ffffff;
  --text: #111111;
  --muted: rgba(0,0,0,.65);

  /* Gesamt: clean + etwas kleiner wie in SCORM */
  --scale: .8;

  /* Deck sizing */
  --card-w-4: calc(var(--scale) * clamp(185px, 22vw, 300px));
  --card-w-1: calc(var(--scale) * clamp(220px, 72vw, 420px));

  --title-size: calc(var(--scale) * clamp(20px, 4.6vw, 32px));
  --title-gap:  calc(var(--scale) * clamp(12px, 3.2vw, 18px));

  --btn-h:      calc(var(--scale) * clamp(36px, 6.5vw, 48px));
  --btn-font:   calc(var(--scale) * clamp(12px, 3.2vw, 15px));
  --btn-pad-x:  calc(var(--scale) * clamp(12px, 3.8vw, 16px));
  --credit-size: calc(var(--scale) * clamp(10px, 2.8vw, 12px));

  --radius: calc(var(--scale) * 16px);
  --shadow: 0 calc(var(--scale) * 18px) calc(var(--scale) * 40px) rgba(0,0,0,.18);

  --stack-shift-1: calc(var(--scale) * 10px);
  --stack-shift-2: calc(var(--scale) * 20px);
  --lift: calc(var(--scale) * 70px);
  --tilt: -2deg;

  --gap: calc(var(--scale) * clamp(12px, 2.8vw, 22px));
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

.container{
  width: min(1500px, 96vw);
  margin: 0 auto;
  padding: calc(var(--scale) * clamp(18px, 4vw, 28px)) 14px calc(var(--scale) * clamp(22px, 5vw, 32px));
}

h1{
  margin: 0 0 var(--title-gap) 0;
  font-size: var(--title-size);
  line-height: 1.08;
  letter-spacing: .2px;
  font-weight: 750;
  text-align:center;
}

.decks{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
  align-items:center;
  justify-items:center;
}

@media (max-width: 1200px){
  .decks{ grid-template-columns: repeat(2, 1fr); }
  :root{ --card-w-4: calc(var(--scale) * clamp(200px, 40vw, 360px)); }
}
@media (max-width: 700px){
  .decks{ grid-template-columns: 1fr; }
  :root{ --card-w-4: var(--card-w-1); }
}

.stage{
  width: var(--card-w, var(--card-w-4));
  aspect-ratio: var(--ratio);
  perspective: 1200px;
  position: relative;
}
.stack{ position:absolute; inset:0; }

.card{
  position:absolute; inset:0;
  border-radius: var(--radius);
  transform-style: preserve-3d;
  box-shadow: var(--shadow);
  user-select:none;
}
.card.stack2{ transform: translate(var(--stack-shift-1), var(--stack-shift-1)) rotate(1deg); filter: brightness(.985); }
.card.stack3{ transform: translate(var(--stack-shift-2), var(--stack-shift-2)) rotate(2deg); filter: brightness(.97); }

.face{
  position:absolute; inset:0;
  backface-visibility: hidden;
  border-radius: var(--radius);
  overflow:hidden;
  background:#fff;
  display:grid;
  place-items:center;
}
.face img{
  width:100%;
  height:100%;
  object-fit: contain;
  display:block;
}
.front{ transform: rotateY(180deg); }
.clickable{ cursor:pointer; }

.draw{
  transition: transform 700ms cubic-bezier(.2,.8,.2,1);
  transform: translateY(calc(-1 * var(--lift))) rotateZ(var(--tilt));
  z-index: 5;
}
.flip{
  transform: translateY(calc(-1 * var(--lift))) rotateZ(var(--tilt)) rotateY(180deg);
}
.stay{ transform: rotateY(180deg); }

.centerBar{
  display:flex;
  flex-direction: column;
  align-items:center;
  justify-content:center;
  margin-top: var(--btn-h);
  gap: calc(var(--scale) * clamp(8px, 2.5vw, 10px));
}
button.primary{
  height: var(--btn-h);
  border:0;
  border-radius: 999px;
  padding: 0 var(--btn-pad-x);
  background:#111;
  color:#fff;
  cursor:pointer;
  font-size: var(--btn-font);
  line-height: 1;
  -webkit-tap-highlight-color: transparent;
}
.credit{
  font-size: var(--credit-size);
  opacity: .65;
  text-align:center;
  max-width: 60ch;
}

/* Top-right nav */
.navToggle{
  position: fixed;
  top: 14px;
  right: 14px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.12);
  background: #fff;
  display:grid;
  place-items:center;
  cursor:pointer;
  z-index: 50;
}
.burger{
  width: 18px;
  height: 12px;
  position: relative;
}
.burger span{
  position:absolute;
  left:0;
  right:0;
  height:2px;
  background:#111;
  border-radius: 999px;
}
.burger span:nth-child(1){ top:0; }
.burger span:nth-child(2){ top:5px; }
.burger span:nth-child(3){ bottom:0; }

.drawerBackdrop{
  position: fixed;
  inset:0;
  background: rgba(0,0,0,.22);
  opacity:0;
  pointer-events:none;
  transition: opacity .18s ease;
  z-index: 49;
}
.drawer{
  position: fixed;
  top: 10px;
  right: 10px;
  width: min(260px, calc(100vw - 20px));
  background: #fff;
  border-radius: 18px;
  border: 1px solid rgba(0,0,0,.10);
  box-shadow: 0 30px 70px rgba(0,0,0,.18);
  transform: translateY(-6px) scale(.98);
  opacity:0;
  pointer-events:none;
  transition: opacity .18s ease, transform .18s ease;
  z-index: 60;
}
.drawer.open{
  opacity:1;
  transform: translateY(0) scale(1);
  pointer-events:auto;
}
.drawerBackdrop.open{
  opacity:1;
  pointer-events:auto;
}
.drawerHeader{
  padding: 14px 14px 8px;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 10px;
}
.drawerTitle{
  font-weight: 700;
}
.drawerClose{
  border:0;
  background: transparent;
  cursor:pointer;
  font-size: 18px;
  padding: 6px 10px;
  border-radius: 10px;
}
.drawerLinks{
  padding: 6px 10px 12px;
  display:grid;
  gap: 6px;
}
.drawerLinks a{
  text-decoration:none;
  color:#111;
  padding: 10px 10px;
  border-radius: 12px;
  display:flex;
  align-items:center;
  justify-content: space-between;
}
.drawerLinks a:hover{
  background: rgba(0,0,0,.04);
}
.smallNote{
  font-size: 12px;
  color: var(--muted);
  padding: 0 14px 14px;
}

/* Minimal pages: no nav, only deck+button */
.minimal{
  min-height: 100%;
  display:grid;
  place-items:center;
  padding: 18px 14px 24px;
}
.minimal .stage{ --card-w: var(--card-w-1); }
.minimal .centerBar{ margin-top: var(--btn-h); }
@media (prefers-reduced-motion: reduce){
  .draw{ transition:none; }
}




/* Info text block under cards (home) */
.info{
  width: min(980px, 96vw);
  margin: calc(var(--btn-h) * 0.8) auto 0;
  padding: 6px 0 0;
  line-height: 1.55;
  color: #111;
}
.info h2{
  margin: 0 0 10px 0;
  font-size: calc(var(--scale) * clamp(18px, 4.2vw, 26px));
  line-height: 1.2;
  font-weight: 750;
  letter-spacing: .1px;
  text-align: center;
}
.info p{ margin: 0 0 10px 0; }
.info p:last-child{ margin-bottom: 0; }
.info ul{ margin: 0 0 12px 18px; padding: 0; }
.info li{ margin: 0 0 8px 0; }
@media (max-width: 520px){
  .info{ padding-top: 2px; }
}

.info p.closing{ text-align: center; }