/* ==========================================================================
   style.css — Jeu de la vie V2
   Thème sombre repris de la V1 (vert #4CAF50 / bleu #6cf).
   Mise en page : grille CSS [panneau latéral | zone principale].
   La barre d'outils fait partie du flux (elle ne flotte plus au-dessus de la
   grille) : plus aucun panneau ne peut en recouvrir un autre.
   ========================================================================== */

:root {
  --bg: #1a1a1a;
  --panel: #222;
  --panel-2: #2b2b2b;
  --border: #383838;
  --text: #f2f2f2;
  --muted: #a9a9a9;
  --accent: #4CAF50;          /* vert des cellules */
  --accent-ink: #10220f;
  --accent-2: #66ccff;        /* bleu des titres / aperçu */
  --radius: 8px;
  --sidebar-w: 260px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 var(--font);
  overflow: hidden;                 /* la grille occupe tout l'écran */
}

/* Texte lu par les lecteurs d'écran uniquement */
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

/* --------------------------------------------------------------------------
   Mise en page générale
   -------------------------------------------------------------------------- */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  height: 100vh;
  height: 100dvh;
}
.main { display: flex; flex-direction: column; min-width: 0; min-height: 0; }

/* --------------------------------------------------------------------------
   Boutons
   -------------------------------------------------------------------------- */
button, .btn {
  font: inherit; font-size: 0.92rem;
  color: var(--text); background: #333;
  border: 1px solid transparent; border-radius: 6px;
  padding: 6px 11px; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  text-decoration: none; line-height: 1.2;
  transition: background .15s, border-color .15s, color .15s;
}
button:hover, .btn:hover { background: #3d3d3d; }
button:focus-visible, .btn:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 2px solid var(--accent-2); outline-offset: 2px;
}
button.primary, .btn.primary { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
button.primary:hover, .btn.primary:hover { background: #5cbf60; }
button.selected { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
button.selected:hover { background: #5cbf60; }
button svg { width: 18px; height: 18px; fill: currentColor; }
.icon-btn { background: none; padding: 4px; color: var(--accent-2); }
.icon-btn:hover { background: #333; }
.icon-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2.2; stroke-linecap: round; }
kbd {
  font: 600 0.78em/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  background: #111; border: 1px solid #555; border-bottom-width: 2px;
  border-radius: 4px; padding: 2px 5px; color: var(--accent-2);
}

/* --------------------------------------------------------------------------
   Panneau latéral
   -------------------------------------------------------------------------- */
.sidebar {
  background: var(--panel);
  border-right: 2px solid var(--border);
  display: flex; flex-direction: column;
  min-height: 0; z-index: 30;
}
.sidebar-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 12px 4px; }
.app-title { margin: 0; font-size: 1.15rem; color: var(--accent); letter-spacing: .02em; }
.search { padding: 6px 12px 8px; display: block; }
.search input {
  width: 100%; padding: 7px 10px; border-radius: 6px;
  border: 1px solid var(--border); background: #161616; color: var(--text); font: inherit;
}
.structures { flex: 1; overflow-y: auto; padding: 0 8px 12px; min-height: 0; }
.structures details { border-bottom: 1px solid #2f2f2f; }
.structures summary {
  cursor: pointer; list-style: none; padding: 8px 4px;
  color: var(--accent); font-weight: 600; font-size: .93rem;
  display: flex; align-items: center; gap: 6px;
}
.structures summary::-webkit-details-marker { display: none; }
.structures summary::before { content: "▸"; color: var(--muted); transition: transform .15s; display: inline-block; }
.structures details[open] summary::before { transform: rotate(90deg); }
.structures summary .count { color: var(--muted); font-weight: 400; font-size: .78rem; margin-left: auto; }
.structures .pattern-btn {
  display: flex; justify-content: space-between; gap: 6px;
  width: 100%; margin: 3px 0; padding: 6px 9px; text-align: left;
  background: #303030; font-size: .87rem;
}
.structures .pattern-btn small { color: var(--muted); font-size: .74rem; white-space: nowrap; }
.structures .pattern-btn.selected small { color: var(--accent-ink); }
.structures .empty { color: var(--muted); padding: 10px 4px; font-size: .9rem; }

/* Fiche de la structure sélectionnée */
.pattern-info {
  border-top: 2px solid var(--border); background: var(--panel-2);
  padding: 10px 12px 12px; max-height: 55%; overflow-y: auto;
}
.pattern-info h2 { margin: 6px 0 2px; font-size: 1rem; color: var(--accent-2); }
.preview { width: 100%; height: 120px; background: #000; border-radius: 6px; display: block; }
.pi-meta { margin: 0 0 4px; color: var(--muted); font-size: .8rem; }
.pi-desc { margin: 0 0 8px; font-size: .86rem; }
.pi-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.pi-actions button { font-size: .82rem; padding: 5px 8px; }
.pi-hint { color: var(--muted); font-size: .76rem; margin: 8px 0 0; }

/* --------------------------------------------------------------------------
   Barre d'outils (dans le flux, au-dessus de la grille)
   -------------------------------------------------------------------------- */
.toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px;
  padding: 8px 12px; background: #202020; border-bottom: 1px solid var(--border);
}
.tb-group { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.tb-label { color: var(--accent-2); font-size: .9rem; margin-right: 2px; }
#btnPlay .ico-pause { display: none; }
#btnPlay.running .ico-play { display: none; }
#btnPlay.running .ico-pause { display: inline; }
#btnPlay { min-width: 104px; justify-content: center; }
.tb-status { display: flex; align-items: center; gap: 12px; margin-left: auto; font-size: .86rem; color: var(--muted); flex-wrap: wrap; }
.tb-status b { color: var(--text); font-variant-numeric: tabular-nums; }
.state { padding: 4px 10px; border-radius: 999px; background: #111; color: var(--text); white-space: nowrap; }
.state::before { content: ""; display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 6px; background: #ddd; }
.state.run { color: var(--accent); }
.state.run::before { background: var(--accent); box-shadow: 0 0 6px var(--accent); }

/* --------------------------------------------------------------------------
   Grille
   -------------------------------------------------------------------------- */
.stage { position: relative; flex: 1; min-height: 0; background: #000; overflow: hidden; }
#gameCanvas { display: block; width: 100%; height: 100%; touch-action: none; cursor: crosshair; }
#gameCanvas.panning { cursor: grabbing; }

.toast {
  position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%);
  background: #111e; color: var(--text); border: 1px solid var(--border);
  padding: 8px 14px; border-radius: var(--radius); font-size: .9rem;
  pointer-events: none; max-width: 90%; text-align: center;
  box-shadow: 0 4px 14px #0008;
}

/* Barre de sélection flottante : affichée uniquement sur petits écrans */
.sel-bar {
  position: absolute; left: 8px; right: 8px; top: 8px; display: none;
  flex-wrap: wrap; gap: 6px; align-items: center;
  background: #1c1c1cee; border: 1px solid var(--border); border-radius: var(--radius); padding: 6px 8px;
}
.sel-name { color: var(--accent-2); font-weight: 600; font-size: .85rem; margin-right: auto; }
.sel-bar button { font-size: .82rem; padding: 6px 8px; }

/* --------------------------------------------------------------------------
   Boîtes de dialogue (<dialog> natif = vraie fenêtre modale centrée)
   -------------------------------------------------------------------------- */
.dialog {
  border: 1px solid var(--border); border-radius: 12px; padding: 0;
  background: #262626; color: var(--text);
  width: min(680px, calc(100vw - 24px)); max-height: calc(100dvh - 24px);
  box-shadow: 0 18px 50px #000c;
}
.dialog::backdrop { background: #000a; }
.dialog-inner { padding: 16px 20px 18px; }
.dialog-head { display: flex; justify-content: space-between; align-items: center; }
.dialog h2 { margin: 0; color: var(--accent); font-size: 1.2rem; }
.dialog h3 { margin: 6px 0 6px; color: var(--accent-2); font-size: .98rem; }
.help-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 22px; }
.keys { list-style: none; margin: 0; padding: 0; font-size: .9rem; }
.keys li { padding: 3px 0; border-bottom: 1px dashed #3a3a3a; }
.keys li span { display: inline-block; min-width: 128px; color: var(--accent-2); }
.keys kbd { margin-right: 3px; }
.help-tip { background: #1d2a1d; border-left: 3px solid var(--accent); padding: 8px 10px; border-radius: 4px; font-size: .9rem; }
.dialog-foot { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: flex-end; margin-top: 12px; }
.dialog-foot .check { margin-right: auto; font-size: .85rem; color: var(--muted); display: flex; gap: 6px; align-items: center; }
#rleText {
  width: 100%; font: .85rem/1.35 ui-monospace, Menlo, monospace;
  background: #111; color: var(--text); border: 1px solid var(--border); border-radius: 6px; padding: 8px;
  resize: vertical;
}
code { background: #111; padding: 1px 5px; border-radius: 4px; color: var(--accent-2); }

/* --------------------------------------------------------------------------
   Responsive : tablette et mobile
   -------------------------------------------------------------------------- */
.only-mobile { display: none !important; }
.sidebar-backdrop { display: none; }

@media (max-width: 1150px) {
  .hide-sm { display: none; }
}

@media (max-width: 820px) {
  .app { grid-template-columns: 1fr; }
  .only-mobile { display: inline-flex !important; }
  /* Le catalogue devient un tiroir qui glisse depuis la gauche */
  .sidebar {
    position: fixed; inset: 0 auto 0 0; width: min(86vw, 320px);
    transform: translateX(-102%); transition: transform .22s ease;
    box-shadow: 6px 0 24px #000a;
  }
  .sidebar.open { transform: none; }
  .sidebar-backdrop:not([hidden]) { display: block; position: fixed; inset: 0; background: #0008; z-index: 25; }
  .toolbar { gap: 6px 8px; padding: 6px 8px; }
  .tb-status { margin-left: 0; width: 100%; justify-content: space-between; }
  .tb-label { display: none; }
  .tb-group { gap: 4px; }
  .toolbar button, .toolbar .btn { padding: 7px 8px; font-size: .84rem; }  /* cibles tactiles confortables */
  #btnPlay { min-width: 88px; }
  .help-cols { grid-template-columns: 1fr; }
  .sel-bar:not([hidden]) { display: flex; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}