/* ================================================================
   Index — The Launcher Grid
   A vitrine of twelve rooms, all visible, all reachable at once.
   Position is identity. The thumb learns the map.
   ================================================================ */

.page-index {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

/* --- Header ---------------------------------------------------- */

.page-index .header {
  --arrive-duration: 1.8s;
  --arrive-delay: 0.2s;
  flex: 0 0 auto;
  padding: 2.2vh var(--page-padding-inline) 1.6vh;
  text-align: center;
}

.page-index .header-name {
  --mark-size: 0.78rem;
  --mark-tracking: 0.52em;
}

.page-index .header-link {
  text-decoration: none;
}

/* --- The Grid -------------------------------------------------- */

.page-index .launcher {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 1px;
  padding: 1px;
  background-color: var(--line-solid);
  opacity: 0;
  animation: ritual-arrive 2.4s var(--ease-ritual) 0.5s forwards;
}

/* --- Cell ------------------------------------------------------ */

.page-index .cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 1rem 0.5rem;
  background-color: var(--surface-page);
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
  transition: background-color var(--duration-gentle) var(--ease-ritual);
}

.page-index .cell:hover {
  background-color: var(--surface-panel);
}

.page-index .cell:active {
  background-color: var(--surface-raised);
  transition-duration: 0.08s;
}

/* --- Cell typography ------------------------------------------- */

.page-index .cell-name {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.05rem, 2vw, 1.5rem);
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-body);
  transition: color var(--duration-gentle) var(--ease-ritual);
}

.page-index .cell:hover .cell-name {
  color: var(--text-strong);
}

.page-index .cell-gloss {
  display: block;
  font-family: var(--font-display);
  font-weight: 300;
  font-style: italic;
  font-size: clamp(0.68rem, 1vw, 0.86rem);
  letter-spacing: 0.04em;
  color: var(--text-subtle);
  transition: color var(--duration-gentle) var(--ease-ritual);
}

.page-index .cell:hover .cell-gloss {
  color: var(--text-accent);
}

/* --- Chambre: the innermost ------------------------------------ */

.page-index .cell-innermost .cell-name {
  font-weight: 400;
}

.page-index .cell-innermost:hover .cell-gloss {
  color: var(--text-seal);
}

/* --- Tablet & mobile: 3 columns x 4 rows ---------------------- */

@media (max-width: 720px) {
  .page-index .header {
    padding-top: 1.6vh;
    padding-bottom: 1vh;
  }

  .page-index .header-name {
    --mark-size: 0.7rem;
  }

  .page-index .launcher {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(4, 1fr);
  }

  .page-index .cell-name {
    font-size: clamp(0.82rem, 3.2vw, 1.1rem);
    letter-spacing: 0.12em;
  }

  .page-index .cell-gloss {
    font-size: 0.7rem;
  }
}

/* --- Narrow phones: 2 columns x 6 rows ------------------------ */

@media (max-width: 360px) {
  .page-index .launcher {
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(6, 1fr);
  }

  .page-index .cell-name {
    font-size: 0.88rem;
    letter-spacing: 0.1em;
  }
}