/* La stanza delle carte */
:root {
  --fondo: #1B1830;
  --testo: #F4EFE6;
  --tenue: #9A93BF;
  --accento: #FFB347;
  --margine: clamp(18px, 4vw, 56px);
  --lato: clamp(104px, 11.5vw, 168px);   /* larghezza di una carta; l'altezza è 1,12 volte */
  --alto: 100vh;
}
@supports (height: 100svh) {
  :root { --alto: 100svh; }
}

* { box-sizing: border-box; }
html,
body {
  margin: 0;
  height: 100%;
}
body {
  font-family: 'Mona Sans Variable', system-ui, sans-serif;
  color: var(--testo);
  background: var(--fondo);
  overflow: hidden;
}
button {
  font: inherit;
}

.stanza {
  position: relative;
  height: var(--alto);
  overflow: hidden;
  background: radial-gradient(120% 90% at 50% 45%, #27224A 0%, var(--fondo) 62%);
}

/* ------------------------------------------------------------------ la testata con le tre viste */
.testa {
  position: absolute;
  z-index: 50;
  top: var(--margine);
  left: var(--margine);
  right: var(--margine);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.testa__titolo {
  margin: 0;
  font-size: clamp(1.1rem, 0.9rem + 0.6vw, 1.5rem);
  font-weight: 700;
  font-stretch: 112%;
}
.viste {
  display: flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
}
.vista {
  min-height: 40px;
  padding: 0 16px;
  border: 0;
  border-radius: 999px;
  background: none;
  color: var(--tenue);
  font-size: 0.95rem;
  font-weight: 620;
  cursor: pointer;
  transition: background-color 0.25s cubic-bezier(0.23, 1, 0.32, 1), color 0.25s cubic-bezier(0.23, 1, 0.32, 1), transform 0.16s cubic-bezier(0.23, 1, 0.32, 1);
}
.vista[aria-pressed='true'] {
  background: var(--testo);
  color: var(--fondo);
}
.vista:active {
  transform: scale(0.97);
}
.vista:focus-visible {
  outline: 2px solid var(--accento);
  outline-offset: 2px;
}

/* ------------------------------------------------------------------ il palco e le carte */
.palco {
  position: absolute;
  inset: 0;
  perspective: 1400px;
  perspective-origin: 50% 50%;
  cursor: grab;
  touch-action: none;
}
.palco--dentro {
  touch-action: pan-y;
}
.palco.preso {
  cursor: grabbing;
}
.carta {
  position: absolute;
  left: 50%;
  top: 50%;
  display: flex;
  flex-direction: column;
  width: var(--lato);
  height: calc(var(--lato) * 1.12);
  margin: calc(var(--lato) * -0.56) 0 0 calc(var(--lato) * -0.5);
  padding: 0;
  border: 0;
  background: #0F0D1D;
  color: var(--testo);
  text-align: left;
  cursor: pointer;
  /* l'angolo tagliato in alto a destra, come un dischetto */
  clip-path: polygon(0 0, 84% 0, 100% 14%, 100% 100%, 0 100%);
  will-change: transform, opacity;
  -webkit-mask-size: 12px 12px;
  mask-size: 12px 12px;
}
.carta:focus-visible {
  outline: 3px solid var(--accento);
  outline-offset: -3px;
}
.carta__copertina {
  flex: 1;
  background-size: cover;
  background-position: center;
  image-rendering: pixelated;
}
.carta__nome {
  flex: none;
  height: 16%;
  display: flex;
  align-items: center;
  padding: 0 8px;
  overflow: hidden;
  font-size: calc(var(--lato) * 0.075);
  font-weight: 650;
  white-space: nowrap;
  text-overflow: ellipsis;
}

/* ------------------------------------------------------------------ l'elenco */
.elenco {
  position: absolute;
  z-index: 20;
  left: 50%;
  top: 50%;
  width: min(760px, calc(100% - var(--margine) * 2));
  margin: 0;
  padding: 0;
  list-style: none;
  translate: -50% -50%;
  pointer-events: none;
}
.elenco.attivo {
  pointer-events: auto;
}
.riga {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  height: var(--riga, 48px);
  padding: 0 0 0 calc(var(--miniatura, 44px) + 18px);
  position: relative;
  border: 0;
  background: none;
  color: var(--testo);
  font-size: clamp(1.2rem, 0.9rem + 1.4vw, 2.3rem);
  font-weight: 680;
  font-stretch: 108%;
  letter-spacing: -0.02em;
  text-align: left;
  cursor: pointer;
}
.riga__nome {
  white-space: nowrap;
}
/* il filo sotto la riga compare con le sue lettere */
.riga::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: rgba(154, 147, 191, 0.22);
  opacity: var(--q, 0);
}
.riga .lettera {
  display: inline-block;
  opacity: var(--k, 0);
  translate: 0 calc((1 - var(--k, 0)) * 0.2em);
}
.riga:focus-visible {
  outline: 2px solid var(--accento);
  outline-offset: -2px;
}
@media (hover: hover) and (pointer: fine) {
  .riga:hover {
    color: var(--accento);
  }
}

/* ------------------------------------------------------------------ il piede: nome e frecce della fila */
.piede {
  position: absolute;
  z-index: 50;
  left: var(--margine);
  right: var(--margine);
  bottom: var(--margine);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  pointer-events: none;
}
.piede__nome {
  margin: 0;
  font-size: clamp(1.4rem, 1rem + 1.6vw, 2.6rem);
  font-weight: 700;
  font-stretch: 112%;
  letter-spacing: -0.02em;
}
.frecce {
  display: flex;
  gap: 8px;
  pointer-events: auto;
}
.frecce[hidden] {
  display: none;
}
.freccia {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 50%;
  background: var(--testo);
  color: var(--fondo);
  cursor: pointer;
  transition: transform 0.16s cubic-bezier(0.23, 1, 0.32, 1);
}
.freccia:active {
  transform: scale(0.94);
}
.freccia:focus-visible {
  outline: 2px solid var(--accento);
  outline-offset: 3px;
}
.freccia svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (max-width: 640px) {
  .testa {
    flex-direction: column;
    align-items: flex-start;
  }
  .vista {
    padding: 0 12px;
  }
}