:root {
  --fond: #f4f2ee;
  --panneau: #fff;
  --texte: #2b2b2b;
  --doux: #6b665d;
  --bord: #d9d5cc;
  --accent: #d9692b;
  --danger: #b3261e;
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--texte);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body {
  display: grid;
  grid-template: "haut haut" auto "panneau vue" 1fr "panneau pieces" auto / 20rem 1fr;
  background: var(--fond);
}
/* Panneau replié : toute la place à la vue 3D (CdC § 5, mode « assemblage ») */
body.replie { grid-template-columns: 2.75rem 1fr; }
body.replie #panneau { padding: .6rem .4rem; }
body.replie #nouvelle-plaque > :not(.titre), body.replie .titre h2 { display: none; }
body.replie #replier { transform: rotate(180deg); }

header {
  grid-area: haut;
  display: flex; align-items: center; gap: 1.5rem;
  padding: .5rem 1rem; background: var(--panneau); border-bottom: 1px solid var(--bord);
}
.depot { color: var(--texte); font-weight: 600; text-decoration: none; }
header > *, .fichier > * { white-space: nowrap; }
.depot:hover { text-decoration: underline; }

#panneau {
  grid-area: panneau; overflow-y: auto;
  padding: 1rem; background: var(--panneau); border-right: 1px solid var(--bord);
}
#vue3d { grid-area: vue; position: relative; min-height: 0; overflow: hidden; }
#vue3d canvas { display: block; width: 100%; height: 100%; touch-action: none; }
#vue3d.survol canvas, #vue3d.pan canvas { cursor: grab; }
#vue3d.glisse canvas { cursor: grabbing; }

form { display: grid; gap: .8rem; }
h2 { margin: 0; font-size: .95rem; }
label { display: grid; gap: .25rem; color: var(--doux); font-size: .85rem; }
label span { display: flex; align-items: center; gap: .4rem; color: var(--texte); }
.cotes { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; }
input, select, button { font: inherit; color: inherit; }
input[type="number"], select {
  width: 100%; padding: .3rem .45rem;
  background: #fff; border: 1px solid var(--bord); border-radius: 4px;
}
input:disabled { color: var(--doux); background: var(--fond); }
header label { display: flex; align-items: center; gap: .4rem; }
header select { width: auto; }
.fichier { display: flex; align-items: center; gap: .4rem; margin-left: auto; min-width: 0; }
.fichier button { padding: .25rem .6rem; }
/* Écran étroit : l'état et le nom se raccourcissent plutôt que de pousser l'aide hors de l'écran */
.etat { min-width: 0; overflow: hidden; text-overflow: ellipsis; margin-right: .4rem; color: var(--doux); font-size: .8rem; }
.etat.erreur-etat { color: var(--danger); }
button.icone { min-width: 2rem; padding: .2rem .45rem; font-size: 1rem; line-height: 1.2; }
button:disabled { opacity: .35; cursor: default; }

/* Accueil de la scène vide */
.accueil {
  position: absolute; left: 50%; top: 42%; z-index: 1; transform: translate(-50%, -50%);
  max-width: 22rem; margin: 0; padding: .8rem 1rem; text-align: center; pointer-events: none;
  color: var(--doux); background: rgb(255 255 255 / .85); border-radius: 6px;
}

/* Fenêtres : enregistrer, mes maquettes, raccourcis */
dialog.fiche { width: min(34rem, 92vw); padding: 1.2rem 1.4rem; border: 1px solid var(--bord); border-radius: 8px; }
dialog.fiche::backdrop { background: rgb(0 0 0 / .25); }
dialog.fiche form { gap: .6rem; }
dialog.fiche input[type="text"] { width: 100%; padding: .4rem .5rem; font-size: 1rem; border: 1px solid var(--bord); border-radius: 4px; }
.aide { margin: 0; color: var(--doux); font-size: .8rem; }
.boutons { display: flex; justify-content: flex-end; gap: .5rem; margin-top: .3rem; }
.boutons button { padding: .4rem 1rem; }
button.principal { cursor: pointer; color: #fff; background: var(--texte); border: 0; border-radius: 4px; font-weight: 600; }
.plans { max-height: 50vh; overflow-y: auto; margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--bord); }
.plans li { display: flex; align-items: center; gap: .5rem; padding: .55rem 0; border-bottom: 1px solid var(--bord); }
.plans li button { padding: .25rem .6rem; }
.titre-plan { display: grid; flex: 1; min-width: 0; }
.titre-plan strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.titre-plan small { color: var(--doux); }
.plans li.courante strong::after { content: " (ouverte)"; color: var(--doux); font-weight: normal; }
.plans li.vide { color: var(--doux); }
.nom-maquette { min-width: 0; max-width: 16rem; margin-right: .6rem; overflow: hidden; text-overflow: ellipsis; font-weight: 600; }
.version { color: var(--doux); font-size: .75rem; }
#enregistrer-sous:not(.nommee) .nommee, #enregistrer-sous.nommee .nouvelle { display: none; }
.nom-maquette.sans-nom { color: var(--doux); font-weight: normal; font-style: italic; }
#raccourcis form { gap: .4rem; }
#raccourcis h3 { margin: .6rem 0 0; font-size: .85rem; color: var(--doux); }
#raccourcis dl { display: grid; grid-template-columns: 13rem 1fr; gap: .25rem 1rem; margin: 0; }
#raccourcis dt { font-weight: 600; }
#raccourcis dd { margin: 0; }
#raccourcis button { justify-self: end; margin-top: .6rem; padding: .35rem 1rem; }

/* Snap refusé : la raison, posée sur le raccord */
.refus {
  display: flex; align-items: center; gap: .5rem;
  margin-top: -1.6rem; padding: .15rem .45rem; font-size: .8rem; font-weight: 600; white-space: nowrap;
  color: #fff; background: var(--danger); border-radius: 4px;
}
.refus button {
  pointer-events: auto; padding: .1rem .45rem; cursor: pointer; font-weight: 600;
  color: var(--danger); background: #fff; border: 0; border-radius: 3px;
}

/* Étiquettes du mode debug, posées sur la vue 3D */
.etiquettes { position: absolute; inset: 0; pointer-events: none; }
.etiquette {
  padding: 0 .25rem; font: 600 11px/1.4 ui-monospace, monospace;
  color: #fff; background: #2f6fde; border-radius: 3px;
}

.choix { display: flex; flex-wrap: wrap; gap: .3rem; margin-top: -.4rem; }
.choix button {
  min-width: 2rem; padding: .15rem .4rem; cursor: pointer;
  background: #fff; border: 1px solid var(--bord); border-radius: 999px;
}
.choix button[aria-pressed="true"] { background: var(--texte); border-color: var(--texte); color: #fff; }

button[type="submit"] {
  padding: .5rem; cursor: pointer;
  background: var(--texte); color: #fff; border: 0; border-radius: 4px; font-weight: 600;
}
button[type="submit"]:hover { background: #000; }
button[type="submit"]:disabled { opacity: .35; cursor: not-allowed; }
button.secondaire {
  padding: .35rem; cursor: pointer;
  background: #fff; border: 1px solid var(--bord); border-radius: 4px;
}
button.secondaire:hover { border-color: var(--texte); }

/* Nouvelle plaque : titre repliable, forme, dessin 2D */
.titre { display: flex; align-items: center; justify-content: space-between; gap: .5rem; }
#replier {
  width: 1.9rem; height: 1.9rem; flex: none; cursor: pointer; font-size: 1.2rem; line-height: 1;
  background: #fff; border: 1px solid var(--bord); border-radius: 4px;
}
.modes { display: flex; overflow: hidden; border: 1px solid var(--bord); border-radius: 6px; }
.modes button { flex: 1; padding: .35rem; cursor: pointer; background: #fff; border: 0; }
.modes button + button { border-left: 1px solid var(--bord); }
.modes button[aria-pressed="true"] { background: var(--texte); color: #fff; }
form[data-mode="rectangle"] .poly-seulement, form[data-mode="polygone"] .rect-seulement { display: none; }
.consigne { margin: -.3rem 0 0; color: var(--doux); font-size: .8rem; }

.editeur {
  display: block; width: 100%; aspect-ratio: 1; touch-action: none;
  background: #fbfaf8; border: 1px solid var(--bord); border-radius: 6px;
}
.editeur:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
form[data-mode="polygone"] .editeur { cursor: crosshair; }
.editeur * { vector-effect: non-scaling-stroke; }
.editeur .grille { fill: none; stroke: #e8e3da; stroke-width: 1; }
.editeur .grille.majeure { stroke: #d4cdc0; }
.editeur .forme { fill: #cfc6b5; stroke: var(--texte); stroke-width: 1.5; }
.editeur .trace { fill: none; stroke: var(--texte); stroke-width: 1.5; }
.editeur .fermeture { stroke: var(--doux); stroke-width: 1; stroke-dasharray: 4 3; }
.editeur .point { fill: #fff; stroke: var(--texte); stroke-width: 1.5; cursor: grab; }
.editeur .point.premier { fill: var(--accent); stroke: var(--accent); }
.editeur .cote {
  fill: var(--texte); font-family: system-ui, sans-serif; text-anchor: middle; dominant-baseline: middle;
  paint-order: stroke; stroke: #fbfaf8; stroke-width: 3px; pointer-events: none;
}

/* Pièce sélectionnée : panneau posé sur la vue 3D */
.flottant {
  position: absolute; top: .75rem; left: .75rem; z-index: 1; width: 14rem; padding: .8rem;
  background: rgb(255 255 255 / .96); border: 1px solid var(--bord); border-radius: 6px;
  box-shadow: 0 2px 10px rgb(0 0 0 / .08);
}
#selection { gap: .6rem; }
#selection .nom {
  width: calc(100% + .7rem); margin: -.2rem -.35rem; padding: .2rem .35rem;
  font-weight: 600; background: transparent; border: 1px solid transparent; border-radius: 4px;
}
#selection .nom:hover, #selection .nom:focus { background: #fff; border-color: var(--bord); }
.actions { display: flex; gap: .4rem; }
.actions button {
  flex: 1; padding: .35rem; cursor: pointer;
  background: #fff; border: 1px solid var(--bord); border-radius: 4px;
}
.actions button:hover { border-color: var(--texte); }
.actions [data-action="supprimer"]:hover { color: var(--danger); border-color: var(--danger); }

/* Barre des pièces */
#pieces {
  grid-area: pieces; min-width: 0; overflow-x: auto;
  display: flex; align-items: center; gap: .75rem;
  padding: .4rem .75rem; background: var(--panneau); border-top: 1px solid var(--bord);
}
#pieces > span { color: var(--doux); font-size: .85rem; }
#pieces ul { display: flex; gap: .35rem; margin: 0; padding: 0; list-style: none; }
#pieces li {
  display: flex; align-items: center; white-space: nowrap;
  background: #fff; border: 1px solid var(--bord); border-radius: 999px;
}
#pieces li.choisie { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
#pieces li.masquee .nom { color: var(--doux); text-decoration: line-through; }
#pieces li button { padding: .2rem .5rem; cursor: pointer; background: none; border: 0; }
#pieces li .oeil { display: flex; padding-left: .1rem; color: var(--doux); }
#pieces li.vide { padding: .2rem 0; color: var(--doux); border: 0; background: none; }

.erreur { padding: 2rem; }