/* ==========================================================================
   101 — Toast Stack
   Pile de toasts dans le coin bas-droit de la zone : entrée slide + spring
   depuis le bord, barre de vie (auto-dismiss, pausée au survol), sortie en
   slide + fade, pile réorganisée en douceur (transition sur transform).
   Racine : .toast-stack — les toasts sont créés par anim.js dans __viewport.
   Séparation des rôles : le wrapper .toast-stack__toast porte la position
   dans la pile (translateY pilotée par --ts-y), la .toast-stack__card porte
   les animations d'entrée/sortie (translateX). Les deux ne se battent jamais.
   Démo CONTENUE dans la zone (viewport absolu). Voir README pour le fixed.
   ========================================================================== */

.toast-stack {
  --ts-accent: var(--ml-accent, #7c8cff);
  --ts-success: var(--ml-accent-2, #2dd4bf);
  --ts-danger: var(--ml-danger, #f87171);

  position: relative;
  width: min(320px, 100%);
  height: 232px;
  border-radius: 16px;
  overflow: hidden;
  background: var(--ml-surface, #151a24);
  border: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--ml-fg, #e8eaf2);
}

/* --- Décor : fausse interface (les toasts recouvrent une "app") ----------- */

.toast-stack__scene {
  position: absolute;
  inset: 0;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 11px;
  pointer-events: none;
}

.toast-stack__ghost {
  height: 10px;
  border-radius: 5px;
  background: color-mix(in srgb, var(--ml-muted, #8b91a3) 16%, transparent);
}

.toast-stack__ghost--title {
  width: 46%;
  height: 14px;
  border-radius: 7px;
  background: color-mix(in srgb, var(--ml-muted, #8b91a3) 26%, transparent);
}

.toast-stack__ghost--short { width: 62%; }

/* --- Déclencheur ---------------------------------------------------------- */

.toast-stack__trigger {
  position: absolute;
  left: 20px;
  bottom: 20px;
  padding: 9px 16px;
  border: 0;
  border-radius: 10px;
  background: var(--ts-accent);
  color: var(--ml-bg, #0d1017);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition:
    transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.3s ease;
}

.toast-stack__trigger:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px -10px color-mix(in srgb, var(--ts-accent) 65%, transparent);
}

.toast-stack__trigger:active {
  transform: translateY(0) scale(0.97);
}

.toast-stack__trigger:focus-visible {
  outline: 2px solid var(--ts-accent);
  outline-offset: 3px;
}

/* --- Viewport : coin d'empilement (contenu dans la zone) ------------------- */

.toast-stack__viewport {
  position: absolute;
  inset: 12px;
  pointer-events: none; /* seuls les toasts sont interactifs */
}

/* --- Toast : wrapper positionnel (pile) ------------------------------------ */

.toast-stack__toast {
  position: absolute;
  right: 0;
  bottom: 0;
  width: min(196px, 100%);
  pointer-events: auto;
  transform: translateY(var(--ts-y, 0px));
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

/* --- Card : entrée spring / sortie fade ------------------------------------ */

.toast-stack__card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 10px 30px 12px 10px;
  border-radius: 12px;
  overflow: hidden;
  background: color-mix(in srgb, var(--ml-surface, #151a24) 88%, white);
  border: 1px solid rgba(255, 255, 255, 0.09);
  box-shadow: 0 12px 28px -12px rgba(0, 0, 0, 0.65);
  animation: toast-stack-in 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes toast-stack-in {
  0%   { opacity: 0; transform: translateX(calc(100% + 16px)); }
  60%  { opacity: 1; transform: translateX(-6px); }
  80%  { transform: translateX(2px); }
  100% { opacity: 1; transform: translateX(0); }
}

.toast-stack__toast.is-leaving .toast-stack__card {
  animation: toast-stack-out 0.3s cubic-bezier(0.55, 0, 0.55, 0.2) forwards;
}

@keyframes toast-stack-out {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(calc(100% + 16px)); }
}

/* --- Types : succès / info / erreur ---------------------------------------- */

.toast-stack__toast--success { --ts-color: var(--ts-success); }
.toast-stack__toast--info    { --ts-color: var(--ts-accent); }
.toast-stack__toast--error   { --ts-color: var(--ts-danger); }

.toast-stack__icon {
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: var(--ts-color, var(--ts-accent));
  background: color-mix(in srgb, var(--ts-color, var(--ts-accent)) 16%, transparent);
}

.toast-stack__icon svg {
  display: block;
  width: 13px;
  height: 13px;
}

.toast-stack__msg {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 550;
  line-height: 1.35;
}

.toast-stack__dismiss {
  position: absolute;
  top: 5px;
  right: 5px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ml-muted, #8b91a3);
  cursor: pointer;
  opacity: 0.7;
  transition: opacity 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.toast-stack__dismiss:hover {
  opacity: 1;
  color: var(--ml-fg, #e8eaf2);
  background: rgba(255, 255, 255, 0.08);
}

.toast-stack__dismiss:focus-visible {
  outline: 2px solid var(--ts-color, var(--ts-accent));
  outline-offset: 1px;
  opacity: 1;
}

.toast-stack__dismiss svg {
  display: block;
  width: 9px;
  height: 9px;
}

/* --- Barre de vie : auto-dismiss, pausée au survol -------------------------- */

.toast-stack__life {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: color-mix(in srgb, var(--ts-color, var(--ts-accent)) 14%, transparent);
}

.toast-stack__life-bar {
  display: block;
  height: 100%;
  background: var(--ts-color, var(--ts-accent));
  transform-origin: left center;
  animation: toast-stack-life var(--ts-life, 3500ms) linear forwards;
}

@keyframes toast-stack-life {
  from { transform: scaleX(1); }
  to   { transform: scaleX(0); }
}

/* survol du toast = pause du compte à rebours (animationend différé) */
.toast-stack__card:hover .toast-stack__life-bar {
  animation-play-state: paused;
}

/* --- Reduced motion --------------------------------------------------------
   Les animations gardent une durée non nulle : animationend pilote la
   suppression des toasts (in/out) — on les rend juste imperceptibles.
   La barre de vie continue de tourner (c'est le minuteur d'auto-dismiss)
   mais devient invisible. */

@media (prefers-reduced-motion: reduce) {
  .toast-stack__trigger { transition: none; }

  .toast-stack__trigger:hover,
  .toast-stack__trigger:active {
    transform: none;
  }

  .toast-stack__toast { transition-duration: 0.01s; }

  .toast-stack__card,
  .toast-stack__toast.is-leaving .toast-stack__card {
    animation-duration: 0.01s;
  }

  .toast-stack__life { opacity: 0; }
}