* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: #111;
  background: #f6f7fb;
}
footer { padding: 12px 16px; }
header { background: #1e293b; color: #f1f5f9; padding: 8px 16px; }
footer { color: #475569; }

h1 { font-size: 20px; margin: 0 0 6px; }
header p { margin: 4px 0 0; }

main { padding: 12px 16px; max-width: 1100px; margin: 0 auto; }

/* Contenu: réglages à gauche, image à droite */
.content-split {
  display: grid;
  /* Colonne réglages réduite ~25% (3fr vs 5fr) */
  grid-template-columns: minmax(460px, 3fr) minmax(420px, 5fr);
  gap: 12px;
  align-items: start;
}

.right-pane { display: block; min-width: 0; }
#layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 12px;
}

#thumbs {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 10px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.05);
  max-height: calc(100vh - 160px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
#thumbs h2 {
  font-size: 14px;
  color: #334155;
  margin: 0 0 8px;
}
#thumbsList {
  overflow: auto;
  padding-right: 4px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.thumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  cursor: pointer;
  background: #f8fafc;
}
.thumb:hover { background: #eef2ff; border-color: #c7d2fe; }
.thumb img {
  display: block;
  width: 70%;
  max-width: 100%;
  height: auto;
  border-radius: 6px;
}
.thumb .name { font-size: 12px; color: #475569; word-break: break-all; }

.panel {
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 6px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.05);
}

.panel { font-size: 0.75em; overflow: hidden; }
.field { display: flex; align-items: center; gap: 3px; margin: 0; flex-wrap: nowrap; line-height: 1.0; justify-content: flex-start; min-width: 0; width: 100%; align-self: start; }
.field:not(.checkbox) { display: grid; grid-template-columns: 90px 80px auto; align-items: center; column-gap: 6px; }
.field > label { flex: 0 0 90px; color: #334155; }
.field.checkbox { gap: 4px; }
.inline { margin-left: 4px; }

/* Custom file input */
.field-file {
  grid-template-columns: 90px 1fr !important;
}
.file-input-wrapper {
  position: relative;
  overflow: hidden;
  display: inline-block;
  width: 50%;
}
.file-input-wrapper input[type=file] {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}
.file-input-button {
  display: block;
  background: #f0f0f0;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 8px;
  text-align: center;
  cursor: pointer;
  width: 100%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Groupes de paramètres */
.params { display: grid; gap: 8px; }
.group {
  background: #fafafa;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 4px;
  overflow: hidden;
}
.group h3 {
  margin: 0 0 2px;
  font-size: 0.85em;
  color: #334155;
}

/* Styles pour les paramètres importants */
.field.important > label,
.field.checkbox.important label {
  color: #dc2626;
  font-weight: 500;
}

.important-note {
  background-color: #fef2f2;
  border-left: 4px solid #dc2626;
  padding: 8px 12px;
  margin: 8px 0 12px;
  border-radius: 4px;
  font-size: 0.85em;
  color: #7f1d1d;
}

.important-note p {
  margin: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  column-gap: 6px;
  row-gap: 2px;
  margin-top: 2px;
  min-width: 0;
  align-items: start; /* pas de stretch vertical */
}

/* Variante: grille forcée à 2 colonnes (desktop) */
.grid.grid-2 {
  grid-template-columns: repeat(2, minmax(200px, 1fr));
}

/* Forcer la ligne "Échelle" à s'étendre sur les 2 colonnes */
.grid.grid-2 .scale-row {
  grid-column: 1 / -1;
}

/* Ajustements compacts pour les sections Temps et Fréquences & résolution */
#group-time .grid.grid-2,
#group-spectrum .grid.grid-2 {
  grid-template-columns: auto 60px auto 60px;
  gap: 6px 10px;
}

/* Section Stéréo encore plus compacte */
#group-stereo .grid {
  display: grid;
  grid-template-columns: 1fr;
  row-gap: 0;
}
#group-stereo .field { margin: 0; }
#group-stereo .field {
  display: grid;
  grid-template-columns: 220px 1fr auto;
  align-items: center;
  column-gap: 6px;
  margin: 0;
}

#group-stereo .field > label {
  grid-column: 1;
  white-space: nowrap;
}

#group-stereo .field > input[type="range"] {
  grid-column: 2;
}

#group-stereo .field > span {
  grid-column: 3;
  justify-self: end;
}

#group-stereo .field.checkbox > input[type="checkbox"] {
  grid-column: 2;
  justify-self: start;
}
#group-stereo input[type="range"] {
  height: 20px;
  margin: 0;
}

#group-time .field > label,
#group-spectrum .field > label {
  flex: 0 0 90px; /* labels plus étroits */
}

#group-time .field input[type="number"],
#group-time .field select,
#group-spectrum .field input[type="number"],
#group-spectrum .field select {
  flex: 0 1 50px; /* champs plus étroits */
}

.buttons { display: flex; flex-direction: column; align-items: stretch; gap: 6px; margin-top: 8px; }
.btn-row { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.btn-row.main { flex-wrap: wrap; }
.btn-row.export { flex-wrap: nowrap; overflow: hidden; }
button {
  background: #2563eb;
  color: white;
  border: none;
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
  font-size: 0.95em;
}
button[disabled] { background: #94a3b8; cursor: not-allowed; }
button:hover:not([disabled]) { background: #1d4ed8; }

/* Compacité forcée des contrôles dans les panneaux */
.panel input[type="number"],
.panel input[type="text"],
.panel select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: textfield;
  height: 24px !important;
  line-height: 24px !important;
  padding: 1px 4px !important;
}

/* supprimer les spinners sous WebKit si nécessaire */
.panel input[type="number"]::-webkit-outer-spin-button,
.panel input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.canvas-wrap {
  position: relative;
  background: white;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  padding: 8px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.05);
  margin-top: 12px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  overflow: auto;
}
#yAxisCanvas { flex: 0 0 auto; width: 30px; height: auto; display: block; }
#spectroCanvas { flex: 0 0 auto; width: auto; height: auto; display: block; image-rendering: pixelated; }

#busy.hidden { display: none; }
#busy {
  position: fixed; inset: 0; display: grid; place-items: center; background: rgba(0,0,0,0.25);
}
#busy .box {
  background: #111827; color: white; padding: 16px 20px; border-radius: 10px; box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

#pos { margin-left: auto; color: #334155; font-size: 0.9em; }

#playhead {
  position: absolute;
  top: 8px; /* padding du parent */
  bottom: 8px; /* padding du parent */
  left: 0; /* Positionnement géré entièrement par JavaScript */
  width: 2px;
  background-color: rgba(255, 255, 255, 0.9); /* Blanc semi-transparent */
  display: none; /* Caché par défaut */
  pointer-events: none; /* Ne pas intercepter les clics */
  z-index: 10;
}

#frequencyCutoff {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #3b82f6; /* Bleu */
  cursor: ns-resize; /* Curseur vertical */
  z-index: 5;
  opacity: 0.8;
  transition: opacity 0.2s;
}

#frequencyCutoff:hover {
  opacity: 1;
}

#frequencyCutoff.dragging {
  opacity: 1;
  background-color: #1d4ed8; /* Bleu plus foncé pendant le drag */
}

#lowFrequencyCutoff {
  position: absolute;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: #dc2626; /* Rouge */
  cursor: ns-resize;
  opacity: 0.8;
  border: 1px solid #991b1b;
  border-radius: 2px;
  pointer-events: auto;
  z-index: 10;
}

#lowFrequencyCutoff:hover {
  opacity: 1;
  background-color: #b91c1c; /* Rouge plus foncé au survol */
}

#lowFrequencyCutoff.dragging {
  opacity: 1;
  background-color: #991b1b; /* Rouge encore plus foncé pendant le drag */
  box-shadow: 0 0 8px rgba(220, 38, 38, 0.5);
}

/* Éviter que les sliders dépassent leur cellule et causent un recouvrement visuel */
.field input[type="range"]{
  width: auto;
  max-width: 100%;
  flex: 1 1 120px; /* s'étire mais peut se contracter */
  min-width: 80px;
}
.field input[type="number"], .field select {
  padding: 1px 4px;
  flex: 0 1 50px; /* plus étroit pour éviter le retour à la ligne */
  min-width: 0;
  height: 24px;
  line-height: 24px;
  font-size: 0.9em;
}

/* Assurer un espace fixe et non chevauchant pour les valeurs à droite des sliders */
.field span[id$="Val"]{
  min-width: 38px;
  text-align: right;
  white-space: nowrap;
  flex: 0 0 auto;
  margin-left: 2px;
  grid-column: 3;
  justify-self: end;
}

/* Boutons: éviter tout chevauchement et espaces excessifs */
.buttons{ gap: 6px; flex-wrap: wrap; align-items: center; }

/* Checkboxes: alignement propre sans débordement */
.field.checkbox label{ display: flex; align-items: center; gap: 6px; }
.field.checkbox.multi {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 8px;
  row-gap: 0;
  margin: 0;
  align-items: center;
}
.field.checkbox.multi label { white-space: normal; }
.nowrap { white-space: nowrap; }
.field input[type="number"], .field select {
  padding: 2px 4px;
}

.cutoff-info {
  margin-top: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  text-align: left;
  font-size: 0.85em;
  color: #3b82f6;
  font-weight: 500;
}

#cutoffFrequency,
#lowFrequency {
  background: rgba(59, 130, 246, 0.1);
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid #3b82f6;
}

/* Tablettes (768px - 1024px) */
@media (max-width: 1024px) {
  main { padding: 8px; max-width: none; }

  /* Réduire la largeur des vignettes */
  #layout {
    grid-template-columns: 200px 1fr;
    gap: 8px;
  }

  /* Ajuster les contrôles */
  .field > label { min-width: 110px; }
  .field input[type="range"] { width: 120px; }

  /* Split devient vertical sur tablette */
  .content-split { grid-template-columns: 1fr; }
  .btn-row.export { flex-wrap: wrap; }
}

/* Poignées tactiles pour tous les écrans */
.cutoff-handle {
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  cursor: pointer;
  z-index: 15;
  display: block; /* Visibles sur tous les écrans */
  border: 2px solid;
  transition: all 0.2s ease;
  touch-action: none;
}

.frequency-handle {
  background-color: rgba(59, 130, 246, 0.9); /* Bleu avec transparence */
  border-color: #3b82f6;
  right: 8px; /* Position à droite */
}

.low-frequency-handle {
  background-color: rgba(220, 38, 38, 0.9); /* Rouge avec transparence */
  border-color: #dc2626;
  right: 8px; /* Position à droite */
}

.cutoff-handle:hover {
  transform: scale(1.1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.cutoff-handle:active,
.cutoff-handle.dragging {
  transform: scale(1.2);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.cutoff-handle::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 6px;
  height: 2px;
  background-color: white;
  border-radius: 1px;
}

/* Mobiles (max 768px) */
@media (max-width: 768px) {
  main { padding: 6px; }

  /* Layout vertical pour mobile */
  #layout { display: block; gap: 12px; }
  .content-split { display: block; }
  .btn-row.export { flex-wrap: wrap; }

  .params { gap: 8px; }
  .group { padding: 6px; }
  .group h3 { margin-bottom: 4px; }

  /* Sur tablette/mobile, autoriser le retour à la ligne si nécessaire */
  .field.checkbox.multi { flex-wrap: wrap; gap: 8px; }

  /* Vignettes adaptées mobile */
  #thumbs {
    max-height: none;
    margin-bottom: 12px;
  }

  #thumbsList {
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
  }

  .thumb {
    padding: 8px;
    gap: 12px;
  }

  .thumb img {
    width: 80px;
    height: 60px;
    object-fit: cover;
  }

  /* Contrôles: rester en ligne sur tablettes pour compacité */
  .field {
    flex-direction: row;
    align-items: center;
    gap: 4px;
    margin: 4px 0;
  }

  .field > label { width: auto; margin-bottom: 0; }

  .field input[type="range"] { width: auto; max-width: 100%; }

  .field input[type="number"],
  .field select { width: 50%; max-width: 120px; }

  /* Boutons adaptés */
  .buttons {
    flex-direction: column;
    gap: 8px;
  }

  button {
    width: 100%;
    padding: 10px;
    font-size: 1em;
  }

  /* Canvas adapté mobile */
  .canvas-wrap {
    flex-direction: column;
    gap: 4px;
    padding: 6px;
  }

  #yAxisCanvas {
    width: 100%;
    height: 20px;
    order: 2;
  }

  #spectroCanvas { width: 100%; order: 1; }

  /* Position du playhead adaptée */
  #playhead {
    top: 6px;
    bottom: 6px;
  }

  /* Grille de paramètres adaptée */
  .grid {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  /* Header et footer adaptés */
  header { padding: 6px 12px; }
  footer { padding: 8px 12px; }

  /* Titre adapté */
  h1 { font-size: 18px; }

  /* Position indicator adapté */
  #pos {
    margin-left: 0;
    margin-top: 8px;
    width: 100%;
    text-align: center;
  }

  /* Poignées plus grandes sur mobile pour faciliter l'interaction tactile */
  .cutoff-handle { width: 32px; height: 32px; }
  .cutoff-handle::after { width: 10px; height: 3px; }
}

/* Petits mobiles (max 480px) */
@media (max-width: 480px) {
  main { padding: 4px; }

  .panel { padding: 6px; }

  .canvas-wrap { padding: 4px; }

  .thumb {
    padding: 6px;
    gap: 8px;
  }

  .thumb img {
    width: 60px;
    height: 45px;
  }

  .thumb .name { font-size: 11px; }

  /* Réduire encore plus les contrôles + passage en colonne sur très petit écran */
  .field {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    margin: 4px 0;
  }
  .field > label { min-width: auto; width: 100%; margin-bottom: 2px; }
  .field input[type="range"] { width: 100%; max-width: none; }
  .field input[type="number"], .field select { width: 50%; max-width: 120px; }

  /* Mais garder la ligne des 2 cases à cocher compacte et horizontale */
  .field.checkbox.multi {
    flex-direction: row;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    margin: 2px 0;
    width: 100%;
  }

  .buttons { gap: 6px; }

  button { padding: 8px; }

  /* Footer encore plus petit */
  footer {
    padding: 6px 8px;
    font-size: 0.85em;
  }
}