/* ============================================================
   APP CONTAINER
   ============================================================ */
.app-container {
  display: flex;
  height: calc(100vh - var(--navbar-height));
  overflow: hidden;
}

/* ============================================================
   PANELS
   ============================================================ */
.panel {
  display: flex;
  flex-direction: column;
  background: var(--bg-base);
  overflow: hidden;
  position: relative;
}

/* Subtle hero pattern overlay on panels */
.panel::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.10;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 304 304' width='304' height='304'%3E%3Cpath fill='%23c4b5fd' fill-opacity='0.6' d='M44.1 224a5 5 0 1 1 0 2H0v-2h44.1zm160 48a5 5 0 1 1 0 2H82v-2h122.1zm57.8-46a5 5 0 1 1 0-2H304v2h-42.1zm0 16a5 5 0 1 1 0-2H304v2h-42.1zm6.2-114a5 5 0 1 1 0 2h-86.2a5 5 0 1 1 0-2h86.2zm-256-48a5 5 0 1 1 0 2H0v-2h12.1zm185.8 34a5 5 0 1 1 0-2h86.2a5 5 0 1 1 0 2h-86.2zM258 12.1a5 5 0 1 1-2 0V0h2v12.1zm-64 208a5 5 0 1 1-2 0v-54.2a5 5 0 1 1 2 0v54.2zm48-198.2V80h62v2h-64V21.9a5 5 0 1 1 2 0zm16 16V64h46v2h-48V37.9a5 5 0 1 1 2 0zm-128 96V208h16v12.1a5 5 0 1 1-2 0V210h-16v-76.1a5 5 0 1 1 2 0zm-5.9-21.9a5 5 0 1 1 0 2H114v48H85.9a5 5 0 1 1 0-2H112v-48h12.1zm-6.2 130a5 5 0 1 1 0-2H176v-74.1a5 5 0 1 1 2 0V242h-60.1zm-16-64a5 5 0 1 1 0-2H114v48h10.1a5 5 0 1 1 0 2H112v-48h-10.1zM66 284.1a5 5 0 1 1-2 0V274H50v30h-2v-32h18v12.1zM236.1 176a5 5 0 1 1 0 2H226v94h48v32h-2v-30h-48v-98h12.1zm25.8-30a5 5 0 1 1 0-2H274v44.1a5 5 0 1 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121.41v98.69zm-144-64a5 5 0 1 1-2 0v-3.51l48-48V48h32V0h2v50H66v55.41l-48 48v2.69zM50 53.9v43.51l-48 48V208h26.1a5 5 0 1 1 0 2H0v-65.41l48-48V53.9a5 5 0 1 1 2 0zm-16 16V89.41l-34 34v-2.82l32-32V69.9a5 5 0 1 1 2 0zM12.1 32a5 5 0 1 1 0 2H9.41L0 43.41V40.6L8.59 32h3.51zm265.8 18a5 5 0 1 1 0-2h18.69l7.41-7.41v2.82L297.41 50H277.9zm-16 160a5 5 0 1 1 0-2H288v-71.41l16-16v2.82l-14 14V210h-28.1zm-208 32a5 5 0 1 1 0-2H64v-22.59L40.59 194H21.9a5 5 0 1 1 0-2H41.41L66 216.59V242H53.9zm150.2 14a5 5 0 1 1 0 2H96v-56.6L56.6 162H37.9a5 5 0 1 1 0-2h19.5L98 200.6V256h106.1zm-150.2 2a5 5 0 1 1 0-2H80v-46.59L48.59 178H21.9a5 5 0 1 1 0-2H49.41L82 208.59V258H53.9zM34 39.8v1.61L9.41 66H0v-2h8.59L32 40.59V0h2v39.8zM2 300.1a5 5 0 0 1 3.9 3.9H3.83A3 3 0 0 0 0 302.17V256h18v48h-2v-46H2v42.1zM34 241v63h-2v-62H0v-2h34v1zM17 18H0v-2h16V0h2v18h-1zm273-2h14v2h-16V0h2v16zm-32 273v15h-2v-14h-14v14h-2v-16h18v1zM0 92.1A5.02 5.02 0 0 1 6 97a5 5 0 0 1-6 4.9v-2.07a3 3 0 1 0 0-5.66V92.1zM80 272h2v32h-2v-32zm37.9 32h-2.07a3 3 0 0 0-5.66 0h-2.07a5 5 0 0 1 9.8 0zM5.9 0A5.02 5.02 0 0 1 0 5.9V3.83A3 3 0 0 0 3.83 0H5.9zm294.2 0h2.07A3 3 0 0 0 304 3.83V5.9a5 5 0 0 1-3.9-5.9zm3.9 300.1v2.07a3 3 0 0 0-1.83 1.83h-2.07a5 5 0 0 1 3.9-3.9zM97 100a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-48 32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm32 48a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm32-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0-32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm32 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16-64a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 96a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16-144a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16-32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-96 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16-32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm96 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16-64a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-32 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zM49 36a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-32 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm32 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zM33 68a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16-48a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 240a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16-64a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16-32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm80-176a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm32 48a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0-32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm112 176a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm-16 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zM17 180a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0 16a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm0-32a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16 0a3 3 0 1 0 0-6 3 3 0 0 0 0 6zM17 84a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm32 64a3 3 0 1 0 0-6 3 3 0 0 0 0 6zm16-16a3 3 0 1 0 0-6 3 3 0 0 0 0 6z'%3E%3C/path%3E%3C/svg%3E");
  background-size: 152px 152px;
}

[data-theme="light"] .panel::before {
  opacity: 0.14;
}

/* Ensure panel content sits above the pattern */
.panel > * { position: relative; z-index: 1; }

.panel-left {
  width: var(--panel-left-width);
  min-width: var(--panel-left-width);
  max-width: 480px;
  border-inline-end: 1px solid var(--surface-border);
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  flex-shrink: 0;
  order: 1;
}

.panel-center {
  flex: 1;
  min-width: 320px;
  order: 2;
}

.panel-right {
  width: var(--panel-right-width);
  min-width: var(--panel-right-width);
  max-width: 560px;
  border-inline-start: 1px solid var(--surface-border);
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  flex-shrink: 0;
  order: 3;
}

/* Panel resizers */
.panel-resizer {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 6px;
  cursor: col-resize;
  z-index: 30;
  background: transparent;
  transition: background var(--transition-fast);
}
#resizerLeft { inset-inline-end: -3px; }
#resizerRight { inset-inline-start: -3px; }
.panel-resizer:hover, .panel-resizer:focus-visible {
  background: var(--purple-glow);
  outline: 2px solid var(--purple-400);
  outline-offset: -2px;
}
body.resizing { cursor: col-resize; user-select: none; }

.panel-header {
  height: var(--panel-header-height);
  min-height: var(--panel-header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 0.85rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--surface-border);
}

.panel-title {
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin: 0;
  white-space: nowrap;
  /* Long localized titles (e.g. "BIBLIOTHÈQUE DE CARTES") must truncate
     instead of pushing the header's count badge / collapse button out of the
     panel, where overflow:hidden clips it. */
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.panel-header > .d-flex { flex-shrink: 0; }
.panel-header > .card-count { flex-shrink: 0; }

.card-count {
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--bg-surface);
  padding: 0.2rem 0.55rem;
  border-radius: 100px;
  border: 1px solid var(--surface-border);
}

/* ============================================================
   PANEL COLLAPSE + FOCUS MODE
   ============================================================ */
.app-container .panel-left,
.app-container .panel-right {
  transition: width var(--transition-normal), min-width var(--transition-normal), max-width var(--transition-normal);
}

.side-left-collapsed #panelLeft,
.side-right-collapsed #panelRight {
  width: 0 !important;
  min-width: 0 !important;
  max-width: 0 !important;
  border-inline-end: 0;
}
.side-left-collapsed #panelLeft { border-inline-end: 0; }
.side-right-collapsed #panelRight { border-inline-start: 0; }

.side-left-collapsed #resizerLeft,
.side-right-collapsed #resizerRight {
  display: none;
}

/* Floating edge-expand toggles — appear when a side panel is collapsed */
.panel-edge-toggle {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  display: none;
  width: 22px;
  height: 54px;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: var(--bg-surface);
  border: 1px solid var(--surface-border);
  color: var(--text-secondary);
  cursor: pointer;
}
.panel-edge-toggle:hover { color: var(--text-primary); background: var(--bg-surface-hover); }
#edgeExpandLeft { inset-inline-start: 0; border-inline-start: none; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
#edgeExpandRight { inset-inline-end: 0; border-inline-end: none; border-radius: var(--radius-sm) 0 0 var(--radius-sm); }

.side-left-collapsed #edgeExpandLeft,
.side-right-collapsed #edgeExpandRight {
  display: flex;
}

@media (prefers-reduced-motion: reduce) {
  .app-container .panel-left,
  .app-container .panel-right { transition: none; }
}