/* ══════════════════════════════════════════════════════════════════════
   Simulation pédagogique — Physique-Chimie Lycée
   Auteur  : Mathieu Berdous
   Licence : CC BY-NC 4.0 — https://creativecommons.org/licenses/by-nc/4.0/
   ══════════════════════════════════════════════════════════════════════ */

/* ══════════════════════════════════════════════════════════════════════
   style.css — Diffraction par une fente
   ══════════════════════════════════════════════════════════════════════ */

/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

html { height: 100%; }
body {
  background: #e8e4de;
  color: #2c3e50;
  font-family: 'Segoe UI', Arial, sans-serif;
  font-size: 14px;
  /* dvh : suit la hauteur réellement visible (barres dynamiques du navigateur) ;
     vh reste le repli pour les navigateurs sans support dvh. */
  height: 100vh;
  max-height: 100vh;
  height: 100dvh;
  max-height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Grille principale : colonne gauche + panneau droit ── */
main {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr clamp(200px, 22vw, 300px);
  grid-template-rows: 1fr;
  overflow: hidden;
}

/* ── Colonne gauche : scène 3D + splitter + graphe ── */
#left-col {
  grid-row: 1;
  grid-column: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  overflow: hidden;
}

/* ── Onglet Ondes lumineuses : conteneur scène 3D + splitter + graphe ── */
#lumineuses-area {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  position: relative; /* référentiel de #graph-lien-overlay, cf. plus bas */
}

/* Overlay pointillés reliant graphe ↔ figure (vue Écran, cf. graph.js → dessinerLienFigure) :
   recouvre exactement scène 3D + splitter + graphe, jamais interactif. */
#graph-lien-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 15;
}

/* ── Onglet Ondes de surfaces : bassin (vue de dessus) + splitter + graphe ── */
#surfaces-area {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}
#surf-scene-area {
  background: #14181d;
  border-right: 1px solid #c8c0b4;
  overflow: hidden;
  flex: 3;
  min-height: clamp(80px, 18vh, 160px);
  position: relative;
}
#surf-canvas { display: block; width: 100%; height: 100%; cursor: grab; }
#surf-canvas:active { cursor: grabbing; }

#surf-splitter {
  flex: 0 0 6px;
  background: #c8c0b4;
  cursor: row-resize;
  position: relative;
  z-index: 20;
  transition: background 0.15s;
  border-right: 1px solid #c8c0b4;
}
#surf-splitter:hover, #surf-splitter.dragging { background: #2a6aaa; }

#surf-graph-area {
  flex: 2;
  background: #faf9f6;
  border-top: 1px solid #c8c0b4;
  border-right: 1px solid #c8c0b4;
  display: none;
  flex-direction: column;
  min-height: clamp(80px, 14vh, 140px);
  overflow: hidden;
  position: relative;
}
/* Barre contrôle graphe(s) — même structure que #graph-ctrl (champ_uniforme) */
#surf-graph-ctrl {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: clamp(4px, 0.5vw, 6px);
  padding: clamp(3px, 0.4vh, 5px) clamp(6px, 0.8vw, 10px);
  flex-wrap: wrap;
  border-bottom: 1px solid #c8c0b4;
  background: #f0ede8;
}
#surf-graph-canvas {
  background: #ffffff;
  border: 1px solid #c8c0b4;
  border-radius: 3px;
  display: block;
  flex: 1;
  min-height: 0;
  cursor: default;
}
#surf-graph-wrap {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0 10px 8px;
}

/* Séparateur mode dual (2 graphes) — overlay sur toute la hauteur de #surf-graph-area */
#surf-graph-dual-sep {
  display: none;
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 2px;
  margin-left: -1px;
  background: #c8c0b4;
  pointer-events: none;
  z-index: 10;
}

.graph-select {
  height: clamp(22px, 2.6vh, 28px);
  padding: 0 clamp(4px, 0.5vw, 7px);
  font-family: inherit;
  font-size: clamp(10px, 1vw, 12px);
  font-weight: 600;
  color: #2c3e50;
  background: #e8e4de;
  border: 1px solid #b0a898;
  border-radius: 5px;
  cursor: pointer;
  min-width: 0;
  flex: 0 0 auto;
  width: clamp(90px, 9vw, 110px);
}
.graph-select:focus { outline: none; }

.graph-mode-btn {
  height: clamp(22px, 2.6vh, 28px);
  padding: 0 clamp(5px, 0.7vw, 9px);
  font-weight: 700;
  font-size: clamp(10px, 1vw, 12px);
  background: #e8e4de;
  color: #5a6a78;
  border: 1px solid #b0a898;
  border-radius: 5px;
  cursor: pointer;
  white-space: nowrap;
  font-family: inherit;
  transition: background 0.12s, color 0.12s;
}
.graph-mode-btn:hover { background: #d0ccc4; color: #2c3e50; }
.graph-mode-btn.active {
  background: #d0dce8;
  border-color: #5a80a8;
  color: #1a3a5a;
}

/* Zone de la scène 3D */
#scene-area {
  background: #14181d;
  border-right: 1px solid #c8c0b4;
  overflow: hidden;
  flex: 3;
  min-height: clamp(80px, 18vh, 160px);
  position: relative;
}
#scene-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}
#scene-canvas:active { cursor: grabbing; }

/* Boutons de vue (overlay coin haut-droit de la scène) */
#view-buttons {
  position: absolute;
  top: clamp(6px, 1vw, 12px);
  right: clamp(6px, 1vw, 12px);
  z-index: 10;
  display: flex;
  gap: 5px;
  background: rgba(20,24,29,0.55);
  padding: 5px;
  border-radius: 7px;
}
.btn-view {
  padding: 6px 10px;
  font-size: clamp(11px, 1.05vw, 13px);
  font-weight: 700;
  border: 1px solid #4a5560;
  border-radius: 5px;
  background: rgba(255,255,255,0.08);
  color: #cfd8df;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}
.btn-view:hover { background: rgba(255,255,255,0.18); color: #fff; }
.btn-view.active { background: #2a6aaa; border-color: #1a5a9a; color: #fff; }

/* Bouton "Décomposer la figure de diffraction" (overlay sous #view-buttons, vue Écran +
   lumière blanche uniquement, cf. scene.js → syncBoutonDecompose) */
#decompose-buttons {
  position: absolute;
  top: calc(clamp(6px, 1vw, 12px) + 42px);
  right: clamp(6px, 1vw, 12px);
  z-index: 10;
  display: none;
  padding-right: 5px; /* aligne la bordure droite du bouton sur celle de #view-buttons (padding:5px) */
}
#decompose-buttons.visible { display: flex; }

/* Bouton "Adapter l'échelle à l'angle de diffraction" (overlay sous #view-buttons, vue
   Dessus uniquement, cf. scene.js → syncBoutonEchelleAngle) */
#echelle-angle-buttons {
  position: absolute;
  top: calc(clamp(6px, 1vw, 12px) + 42px);
  right: clamp(6px, 1vw, 12px);
  z-index: 10;
  display: none;
  padding-right: 5px; /* aligne la bordure droite du bouton sur celle de #view-buttons (padding:5px) */
}
#echelle-angle-buttons.visible { display: flex; }

/* ── Splitter draggable ── */
#left-splitter {
  flex: 0 0 6px;
  background: #c8c0b4;
  cursor: row-resize;
  position: relative;
  z-index: 20;
  transition: background 0.15s;
  border-right: 1px solid #c8c0b4;
}
#left-splitter:hover, #left-splitter.dragging {
  background: #2a6aaa;
}

/* Zone graphe I(x) */
#graph-area {
  flex: 2;
  background: #faf9f6;
  border-top: 1px solid #c8c0b4;
  border-right: 1px solid #c8c0b4;
  display: flex;
  flex-direction: column;
  min-height: clamp(80px, 14vh, 140px);
  overflow: hidden;
  position: relative;
}

/* Barre de contrôle du graphe */
#graph-time-control {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  flex-shrink: 0;
  padding: 6px 10px 4px;
}
#graph-btns-left { display: flex; gap: 6px; align-items: center; }
#graph-btns-right { display: flex; gap: 6px; align-items: center; }

.graph-title {
  font-size: 15px; color: #2c3e50; font-weight: 700;
}

#graph-btns-right button, #graph-btns-left button {
  height: 30px; padding: 0 12px; font-weight: 700; line-height: 30px;
  background: #e8e4de; color: #5a6a78;
  border: 1px solid #b0a898; border-radius: 5px;
  cursor: pointer; box-sizing: border-box; white-space: nowrap;
}
#btn-graph-pin  { font-size: 13px; }
#btn-graph-lien { font-size: 13px; }

#graph-btns-right button:hover, #graph-btns-left button:hover { background: #d0ccc4; color: #2c3e50; }
#graph-btns-right button.active, #graph-btns-left button.active {
  background: #2a6aaa; color: #fff; border-color: #1a5a9a;
}
#graph-btns-right button.active:hover { background: #1a5a9a; }
#graph-btns-right button:disabled {
  opacity: 0.4; cursor: not-allowed; background: #e8e4de; color: #5a6a78;
}

/* Zone du canvas de graphe */
.graph-wrap {
  flex: 1;
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
  overflow: hidden;
  padding: 0 10px 8px;
  position: relative; /* référentiel de .graph-legend-blanche */
}

/* Légende à cases à cocher du graphe en mode Lumière blanche (cf. graph.js) */
.graph-legend-blanche {
  display: none;
  position: absolute;
  top: 16px; right: 40px;
  background: rgba(255,255,255,0.95);
  border: 1px solid #c8c0b4;
  border-radius: 5px;
  padding: 5px 8px;
  flex-direction: column;
  gap: 2px;
  font-size: 11px;
  max-height: calc(100% - 12px);
  overflow-y: auto;
  z-index: 5;
}
.graph-legend-blanche.visible { display: flex; }
.graph-legend-blanche label { display: flex; align-items: center; gap: 6px; cursor: pointer; user-select: none; }
.graph-legend-blanche input[type=checkbox] { margin: 0; cursor: pointer; }
.legend-swatch {
  display: inline-block; width: 11px; height: 11px; border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.25);
}
.graph-wrap canvas {
  background: #ffffff;
  border: 1px solid #c8c0b4;
  border-radius: 3px;
  display: block;
  flex: 1;
  min-height: 0;
  cursor: pointer;
}

/* ── Panneau droit : styles communs ── */
#panel {
  background: #e8e4de;
  border-left: 1.5px solid #c8c0b4;
  display: flex;
  flex-direction: column;
  grid-row: 1;
  grid-column: 2;
  min-height: 0;
  overflow: hidden;
  font-size: clamp(11px, 1.1vw, 14px);
}
/* ── Onglets principaux ──────────────────────────── */
.panel-main-tabs {
  display: flex;
  flex-shrink: 0;
  border-bottom: 1.5px solid #b0a898;
}
.panel-main-tab {
  flex: 1;
  padding: 9px 4px;
  font-size: clamp(12px, 1.2vw, 15px);
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: #d4d0c8;
  color: #8a9aaa;
  border-right: 1px solid #b0a898;
  transition: background 0.12s, color 0.12s;
}
.panel-main-tab:last-child { border-right: none; }
.panel-main-tab:hover { background: #ccc8c0; color: #2c3e50; }
.panel-main-tab.active {
  background: #e8e4de;
  color: #2a6aaa;
  border-bottom: 1.5px solid #e8e4de;
  margin-bottom: -1.5px;
}

#panel-body {
  flex: 1;
  min-height: 0;
  padding: clamp(8px, 1.2vw, 16px) clamp(6px, 1vw, 14px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow-y: auto;
}

.panel-main-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.section-title {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; color: #7a8a96; margin-bottom: 4px;
}

/* Paramètres (label + slider) */
.param-row { display: flex; flex-direction: column; gap: 3px; margin-bottom: 6px; }
.param-row label { display: flex; justify-content: space-between; font-size: clamp(12px, 1.15vw, 15px); color: #2c3e50; }
.param-row label span { color: #2a5080; font-weight: 600; }
input[type=range] { width: 100%; accent-color: #4a7aaa; cursor: pointer; }
input[type=range]:disabled { accent-color: #b0aca4; cursor: not-allowed; }
/* Sélecteur de forme (repris de .diss-select de dissolution/) */
#sl-mask-shape {
  width: 100%; padding: 7px 8px; border: 1px solid #c8c0b4; border-radius: 5px;
  background: #fff; color: #2c3e50; font-family: inherit;
  font-size: clamp(12px, 1.25vw, 15px); cursor: pointer;
}
#sl-mask-shape:focus { outline: none; border-color: #2a6aaa; }

/* Sélecteur Source lumineuse — bascule à 2 options de même poids visuel (mono/blanche),
   PAS un on/off (repris de .diss-unit-toggle de dissolution/) : contrairement à
   .btn-toggle-one (état actif/inactif d'une fonctionnalité), les deux boutons sont
   toujours présents et seule l'option choisie est mise en évidence. */
.light-source-toggle {
  display: flex;
  border: 1px solid #c8c0b4;
  border-radius: 6px;
  overflow: hidden;
}
.light-source-btn {
  flex: 1;
  padding: 8px 4px;
  font-size: clamp(12px, 1.1vw, 14px);
  font-weight: 700;
  font-family: inherit;
  border: none;
  background: #ece8e0;
  color: #5a6a78;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
}
.light-source-btn:not(:last-child) { border-right: 1px solid #c8c0b4; }
.light-source-btn:hover { background: #ddd8ce; }
.light-source-btn.active { background: #2a6aaa; color: #fff; }

.param-row.disabled label { color: #a8a49c; }
.param-row.disabled label span { color: #a8a49c; }
.input-hint { font-size: clamp(10px, 0.9vw, 13px); color: #7a8a96; }

/* Pastille de couleur du laser à côté du réglage λ */
#lambda-swatch {
  display: inline-block;
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 1px solid rgba(0,0,0,0.25);
  vertical-align: -1px;
  margin-right: 5px;
}

/* Boutons génériques */
.btn {
  width: 100%; padding: 9px 6px; border: 1px solid transparent; border-radius: 6px;
  font-size: clamp(12px, 1.2vw, 15px); font-weight: 700; cursor: pointer;
  font-family: inherit; transition: transform 0.1s, background 0.15s; letter-spacing: 0.3px;
}
.btn:active { transform: scale(0.97); }

.btn-toggle-one {
  background: #ece8e0; color: #5a6a78; border: 1px solid #c8c0b4;
}
.btn-toggle-one.active {
  background: #fde8c8; color: #7a3a10; border-color: #d0a060;
}
.btn-toggle-one:hover { background: #ddd8ce; }
.btn-toggle-one.active:hover { background: #f8dcb0; }

.btn-reset {
  background: #dedad2; color: #5a6a78; border: 1px solid #b0a898;
}
.btn-reset:hover { background: #d0ccc4; color: #2c3e50; }

.btn-pause { background: #c08020; color: #fff; }
.btn-pause:hover { background: #a06010; }
.btn-play { background: #2a8a50; color: #fff; }
.btn-play:hover { background: #1a6a38; }

.btn-raz { background: #dedad2; color: #5a6a78; border: 1px solid #b0a898; }
.btn-raz:hover { background: #ccc8c0; color: #2c3e50; }

/* Ligne de boutons côte à côte (ex. Pause + RAZ) : chacun garde le style .btn
   habituel, seule la largeur devient partagée au lieu de 100%. RAZ reste
   étroit (texte court et fixe) pour laisser toute la place à Pause/Reprendre,
   dont le texte change et ne doit pas passer à la ligne. */
.btn-row { display: flex; gap: 6px; }
.btn-row > .btn { width: auto; flex: 1 1 0; white-space: nowrap; }
.btn-row > .btn-raz { flex: 0 0 auto; }

/* Encarts de valeurs instantanées */
.readouts { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.readout { background: #fff; border: 1px solid #c8c0b4; border-radius: 6px; padding: 7px 9px; }
.readout.full-width { grid-column: 1 / -1; }
.readout .ro-label { font-size: clamp(13.2px, 1.2vw, 15.6px); color: #7a8a96; margin-bottom: 2px; }
.readout .ro-value { font-size: clamp(16.8px, 1.8vw, 21.6px); font-weight: 700; color: #2a5080; font-variant-numeric: tabular-nums; }
.readout .ro-value.ro-value-split { display: flex; justify-content: space-between; align-items: baseline; }
.readout .ro-unit  { font-size: 14.4px; color: #7a8a96; }

/* Point de couleur identifiant une longueur d'onde dans les cadres de valeurs (lumière blanche) */
.swatch-blanche { display: inline-block; width: 9px; height: 9px; border-radius: 50%; border: 1px solid rgba(0,0,0,0.15); margin-right: 4px; vertical-align: middle; flex: none; }

/* Cadre θ / largeur en lumière blanche : une ligne par couleur de référence à l'intérieur
   d'un seul cadre (au lieu d'un cadre par couleur), même famille visuelle que .readout. */
.ro-row { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; padding: 3px 0; }
.ro-row:not(:last-child) { border-bottom: 1px solid #ece8e0; }
.ro-row .ro-row-nom { font-size: clamp(11px, 1vw, 13px); color: #45505a; display: flex; align-items: center; }
.ro-row .ro-row-nom.ro-row-nom-theta { font-size: clamp(10px, 0.85vw, 12px); }
.ro-row .ro-row-value { font-size: clamp(13px, 1.4vw, 17px); font-weight: 700; color: #2a5080; font-variant-numeric: tabular-nums; display: flex; gap: 10px; }

/* ════════════════════════════════════════════════════
   BANDEAU INSTRUCTIONS
════════════════════════════════════════════════════ */
.panel-hint {
  flex-shrink: 0;
  color: #5a6a78;
  line-height: 1.5;
  background: #fff;
  border: 1.5px solid #b0a898;
  /* Pas de bordure gauche propre : #panel a déjà la sienne (border-left,
     cf. ci-dessus) — sinon les deux bordures se superposent avec un léger
     décalage sous-pixel, visible uniquement ici. */
  border-left: none;
  overflow: hidden;
  transition: padding 0.2s;
}
.panel-hint-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
}
.panel-hint-title {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #7a8a96;
  margin-left: auto;
  margin-right: 6px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.panel-hint-menu-btn {
  background: #f0f4f7;
  border: 1px solid #c8d4dc;
  border-radius: 6px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 600;
  color: #4a5a68;
  padding: 4px 9px;
  line-height: 1.2;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}
.panel-hint-menu-btn:hover { background: #dde6ec; color: #2a6aaa; }
.panel-hint-toggle {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  color: #7a8a96;
  padding: 0 2px;
  line-height: 1;
  transition: transform 0.2s;
}
.panel-hint-toggle:hover { color: #2a6aaa; }
.panel-hint-body {
  font-size: clamp(11px, 1.1vw, 14px);
  padding: 0 10px 8px;
  overflow: hidden;
  transition: max-height 0.25s ease, padding 0.25s ease;
  max-height: 250px;
}
.panel-hint.collapsed .panel-hint-body {
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
}
.panel-hint:not(.collapsed) .panel-hint-toggle { transform: rotate(180deg); }


/* Labels alignés sur les 4 crans d'un slider pas=1 (0-3) */
.speed-ticks {
  display: grid;
  grid-template-columns: repeat(3, 1fr) 0fr;
  font-size: clamp(9px, 0.85vw, 11px);
  color: #7a8a96;
  padding: 0 7px;
  line-height: 1;
  margin-top: 1px;
}
.speed-ticks span:not(:last-child) {
  text-align: left;
}
.speed-ticks span:last-child {
  text-align: right;
  white-space: nowrap;
}