/* ============================================================
   SKETCH — Wireframe Tool · Soft Paper Aesthetic
   ============================================================ */

:root {
  --paper:    #f5f2ec;
  --paper-2:  #ede9e0;
  --paper-3:  #e4dfd4;
  --ink:      #1a1714;
  --ink-2:    #4a4540;
  --ink-3:    #8a857e;
  --ink-4:    #b8b3ac;
  --accent:        #2563eb;
  --accent-light:  rgba(37,99,235,0.10);
  --accent-2:      #dc2626;
  --wire:     #c8c3bc;
  --shadow:    0 2px 12px rgba(26,23,20,0.08);
  --shadow-lg: 0 8px 32px rgba(26,23,20,0.14);
  --radius: 6px;
  --font: 'DM Sans', sans-serif;
  --mono: 'DM Mono', monospace;
  --panel:  240px;
  --rpanel: 260px;
  --header: 48px;
  --sel-color: #2563eb;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  height: 100%;
  overflow: hidden;
  font-family: var(--font);
  background: var(--paper);
  color: var(--ink);
  user-select: none;
}

/* ============================================================ LAYOUT */
.app {
  display: grid;
  grid-template-rows: var(--header) 1fr;
  grid-template-columns: var(--panel) 1fr var(--rpanel);
  height: 100vh;
}

/* ============================================================ HEADER */
.header {
  grid-column: 1 / -1;
  background: var(--ink);
  display: flex;
  align-items: center;
  padding: 0 12px;
  gap: 8px;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.logo {
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 500;
  color: #fff;
  letter-spacing: 0.18em;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-right: 4px;
}
.logo-icon {
  width: 20px;
  height: 20px;
  border: 2px solid var(--accent);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.logo-icon::after {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
}

.header-sep {
  width: 1px;
  height: 22px;
  background: rgba(255,255,255,0.10);
  flex-shrink: 0;
}

.tool-group { display: flex; gap: 1px; }

.tool-btn {
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.45);
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s;
  position: relative;
  font-size: 0.7rem;
  font-family: var(--mono);
  flex-shrink: 0;
}
.tool-btn:hover  { background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.9); }
.tool-btn.active { background: var(--accent); color: #fff; }
.tool-btn.grid-on { background: rgba(37,99,235,0.25); color: #7aabff; }
.tool-btn svg    { pointer-events: none; }

.tool-tip {
  position: absolute;
  bottom: -32px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink-2);
  color: #fff;
  font-size: 0.62rem;
  font-family: var(--mono);
  white-space: nowrap;
  padding: 3px 8px;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 9999;
}
.tool-btn:hover .tool-tip { opacity: 1; }

.header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}
.zoom-display {
  font-family: var(--mono);
  font-size: 0.70rem;
  color: rgba(255,255,255,0.35);
  min-width: 42px;
  text-align: center;
}

.hbtn {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.10);
  color: rgba(255,255,255,0.65);
  padding: 5px 12px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.73rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.12s;
  white-space: nowrap;
}
.hbtn:hover       { background: rgba(255,255,255,0.13); color: #fff; }
.hbtn.primary     { background: var(--accent); border-color: var(--accent); color: #fff; }
.hbtn.primary:hover { background: #1d4ed8; }
.hbtn.danger      { background: rgba(220,38,38,0.15); border-color: rgba(220,38,38,0.25); color: #f87171; }
.hbtn.danger:hover { background: rgba(220,38,38,0.25); color: #fca5a5; }

/* ============================================================ LEFT PANEL */
.left-panel {
  background: var(--paper-2);
  border-right: 1px solid var(--wire);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
}

.panel-section {
  padding: 12px;
  border-bottom: 1px solid var(--wire);
}

.panel-title {
  font-family: var(--mono);
  font-size: 0.60rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 8px;
}

.panel-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.panel-title-row .panel-title { margin-bottom: 0; }

.panel-icon-btn {
  background: transparent;
  border: none;
  color: var(--ink-3);
  width: 20px;
  height: 20px;
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s;
  flex-shrink: 0;
}
.panel-icon-btn:hover {
  background: var(--paper-3);
  color: var(--ink);
}

/* ============================================================ PAGES */
.page-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 8px 5px 6px;
  border-radius: 4px;
  cursor: pointer;
  border-left: 2px solid transparent;
  margin-bottom: 1px;
  transition: all 0.12s;
  group: true;
}
.page-item:hover { background: var(--paper-3); }
.page-item.active {
  background: var(--accent-light);
  border-left-color: var(--accent);
}
.page-item-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--ink-4);
  flex-shrink: 0;
  transition: background 0.12s;
}
.page-item.active .page-item-dot { background: var(--accent); }

.page-item-name {
  flex: 1;
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--ink-2);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  outline: none;
}
.page-item.active .page-item-name { color: var(--accent); }
.page-item-name[contenteditable="true"] {
  color: var(--ink);
  background: var(--paper);
  border-radius: 2px;
  padding: 0 3px;
}

.page-item-del {
  opacity: 0;
  font-size: 0.65rem;
  color: var(--ink-3);
  cursor: pointer;
  width: 14px;
  height: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
  flex-shrink: 0;
  line-height: 1;
  transition: all 0.1s;
}
.page-item:hover .page-item-del { opacity: 1; }
.page-item-del:hover { background: rgba(220,38,38,0.12); color: var(--accent-2); }

/* ============================================================ COMPOSANTS */
.comp-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
}
.comp-item {
  background: var(--paper);
  border: 1px solid var(--wire);
  border-radius: var(--radius);
  padding: 8px 6px;
  cursor: grab;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  transition: all 0.15s;
}
.comp-item:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.comp-item:active { cursor: grabbing; transform: translateY(0); }
.comp-preview {
  width: 100%;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.comp-label {
  font-family: var(--mono);
  font-size: 0.60rem;
  color: var(--ink-3);
  text-align: center;
}

/* Previews */
.prev-btn    { width: 80%; height: 20px; background: var(--ink-4); border-radius: 3px; }
.prev-input  { width: 80%; height: 20px; border: 1.5px solid var(--ink-4); border-radius: 3px; background: transparent; }
.prev-text   { width: 85%; display: flex; flex-direction: column; gap: 3px; }
.prev-text span { display: block; height: 4px; background: var(--ink-4); border-radius: 2px; }
.prev-text span:nth-child(2) { width: 75%; }
.prev-text span:nth-child(3) { width: 55%; }
.prev-image  { width: 80%; height: 26px; border: 1.5px solid var(--ink-4); border-radius: 3px; display: flex; align-items: center; justify-content: center; position: relative; overflow: hidden; }
.prev-image::after  { content:''; position:absolute; width:40%; aspect-ratio:1; border-radius:50%; background:var(--ink-4); top:4px; left:50%; transform:translateX(-50%); }
.prev-image::before { content:''; position:absolute; bottom:0; left:0; right:0; height:45%; background:var(--ink-4); }
.prev-nav    { width: 90%; height: 14px; background: var(--ink-4); border-radius: 2px; }
.prev-card   { width: 80%; height: 24px; border: 1.5px solid var(--ink-4); border-radius: 4px; }
.prev-table  { width: 85%; display: flex; flex-direction: column; gap: 2px; }
.prev-table span { display: block; height: 5px; background: var(--ink-4); border-radius: 1px; }
.prev-table span:first-child { background: var(--ink-3); }
.prev-modal  { width: 65%; height: 24px; border: 1.5px solid var(--ink-3); border-radius: 4px; box-shadow: 2px 2px 0 var(--ink-4); }
.prev-form   { width: 80%; display: flex; flex-direction: column; gap: 3px; }
.prev-form span { display: block; height: 8px; border: 1px solid var(--ink-4); border-radius: 2px; }
.prev-toggle { width: 28px; height: 14px; border: 1.5px solid var(--ink-3); border-radius: 7px; position: relative; }
.prev-toggle::after { content:''; position:absolute; width:9px; height:9px; background:var(--ink-3); border-radius:50%; top:1px; left:2px; }
.prev-check  { display: flex; gap: 4px; align-items: center; }
.prev-check span { width: 10px; height: 10px; border: 1.5px solid var(--ink-4); border-radius: 2px; }
.prev-avatar { width: 24px; height: 24px; border-radius: 50%; border: 1.5px solid var(--ink-4); }
.prev-badge  { width: 28px; height: 12px; background: var(--ink-4); border-radius: 6px; }
.prev-divider { width: 80%; height: 1.5px; background: var(--ink-4); }
.prev-progress { width: 80%; height: 8px; border: 1.5px solid var(--ink-4); border-radius: 4px; overflow: hidden; position: relative; }
.prev-progress::after { content:''; position:absolute; left:0; top:0; bottom:0; width:60%; background:var(--ink-3); }

/* ============================================================ CANVAS */
.canvas-area {
  background: var(--paper-3);
  overflow: hidden;
  position: relative;
  cursor: default;
}
.canvas-area.tool-text  { cursor: text; }
.canvas-area.tool-select { cursor: default; }
.canvas-area.tool-pan   { cursor: grab; }
.canvas-area.tool-pan.panning { cursor: grabbing; }

#mainCanvas { position: absolute; top: 0; left: 0; pointer-events: none; }

/* Canvas empty hint */
.canvas-empty-hint {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  pointer-events: none;
  transition: opacity 0.2s;
}
.canvas-empty-icon {
  opacity: 0.12;
  margin-bottom: 10px;
  color: var(--ink-2);
}
.canvas-empty-text {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--ink-3);
  opacity: 0.45;
  line-height: 1.7;
}

/* ============================================================ RIGHT PANEL */
.right-panel {
  background: var(--paper-2);
  border-left: 1px solid var(--wire);
  overflow-y: auto;
  overflow-x: hidden;
}

.prop-section { padding: 12px; border-bottom: 1px solid var(--wire); }
.prop-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
  gap: 8px;
}
.prop-row:last-child { margin-bottom: 0; }
.prop-label {
  font-family: var(--mono);
  font-size: 0.67rem;
  color: var(--ink-3);
  white-space: nowrap;
  min-width: 48px;
}
.prop-input {
  background: var(--paper);
  border: 1px solid var(--wire);
  color: var(--ink);
  padding: 5px 8px;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 0.72rem;
  width: 100%;
  outline: none;
  transition: border-color 0.15s;
}
.prop-input:focus { border-color: var(--accent); }
.prop-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 6px; margin-bottom: 8px; }

.align-btns { display: flex; gap: 3px; flex-wrap: wrap; }
.align-btn {
  background: var(--paper);
  border: 1px solid var(--wire);
  color: var(--ink-3);
  width: 28px;
  height: 28px;
  border-radius: 3px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  transition: all 0.12s;
}
.align-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-light); }

.no-selection {
  padding: 32px 16px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.no-sel-icon { color: var(--ink-3); opacity: 0.2; margin-bottom: 4px; }
.no-sel-text { font-size: 0.80rem; color: var(--ink-2); font-weight: 500; }
.no-sel-hint { font-size: 0.70rem; color: var(--ink-3); line-height: 1.5; }

/* ============================================================ CALQUES */
.layer-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.10s;
}
.layer-item:hover   { background: var(--paper-3); }
.layer-item.selected { background: var(--accent-light); color: var(--accent); }
.layer-icon  { font-size: 0.68rem; opacity: 0.45; width: 14px; text-align: center; flex-shrink: 0; }
.layer-name  { flex: 1; font-family: var(--mono); font-size: 0.67rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layer-vis   { opacity: 0.35; cursor: pointer; font-size: 0.62rem; flex-shrink: 0; transition: opacity 0.1s; }
.layer-vis:hover { opacity: 1; }

/* ============================================================ ÉLÉMENTS CANVAS */
.wire-el { position: absolute; box-sizing: border-box; cursor: move; }
.wire-el.selected .el-inner { outline: 2px solid var(--sel-color) !important; outline-offset: 1px; }
.wire-el.selected .resize-handle { display: block; }
.el-inner { width: 100%; height: 100%; position: relative; pointer-events: none; }

/* Poignées de redimensionnement */
.resize-handle {
  display: none;
  position: absolute;
  width: 8px;
  height: 8px;
  background: #fff;
  border: 2px solid var(--sel-color);
  border-radius: 2px;
  z-index: 10;
}
.rh-nw { top:-4px;  left:-4px;               cursor: nw-resize; }
.rh-n  { top:-4px;  left:calc(50% - 4px);     cursor: n-resize;  }
.rh-ne { top:-4px;  right:-4px;               cursor: ne-resize; }
.rh-e  { top:calc(50% - 4px); right:-4px;     cursor: e-resize;  }
.rh-se { bottom:-4px; right:-4px;             cursor: se-resize; }
.rh-s  { bottom:-4px; left:calc(50% - 4px);   cursor: s-resize;  }
.rh-sw { bottom:-4px; left:-4px;              cursor: sw-resize; }
.rh-w  { top:calc(50% - 4px); left:-4px;      cursor: w-resize;  }

/* ============================================================ STYLES ÉLÉMENTS */
.wf-btn { width:100%; height:100%; background:var(--ink-4); border-radius:4px; display:flex; align-items:center; justify-content:center; font-family:var(--mono); font-size:0.72rem; color:var(--ink-2); }
.wf-input { width:100%; height:100%; border:1.5px solid var(--ink-4); border-radius:4px; background:var(--paper); display:flex; align-items:center; padding:0 8px; font-family:var(--mono); font-size:0.72rem; color:var(--ink-3); }
.wf-text { width:100%; height:100%; display:flex; flex-direction:column; justify-content:flex-start; gap:5px; padding:4px 0; }
.wf-text span { display:block; height:8px; background:var(--ink-4); border-radius:2px; }
.wf-text span:nth-child(2) { width:80%; }
.wf-text span:nth-child(3) { width:60%; }
.wf-image { width:100%; height:100%; border:1.5px solid var(--ink-4); border-radius:4px; background:var(--paper-3); display:flex; align-items:center; justify-content:center; overflow:hidden; position:relative; }
.wf-image::after { content:'⬡'; font-size:1.5rem; color:var(--ink-4); }
.wf-nav { width:100%; height:100%; background:var(--ink-4); border-radius:3px; display:flex; align-items:center; padding:0 12px; gap:16px; }
.wf-nav span { display:block; height:6px; width:40px; background:rgba(255,255,255,0.5); border-radius:2px; }
.wf-nav span:first-child { width:60px; background:rgba(255,255,255,0.8); }
.wf-card { width:100%; height:100%; border:1.5px solid var(--ink-4); border-radius:6px; background:var(--paper); display:flex; flex-direction:column; overflow:hidden; }
.wf-card-img  { flex:1; background:var(--paper-3); border-bottom:1px solid var(--wire); }
.wf-card-body { padding:8px; display:flex; flex-direction:column; gap:4px; }
.wf-card-body span { display:block; height:5px; background:var(--ink-4); border-radius:2px; }
.wf-card-body span:nth-child(2) { width:70%; }
.wf-table { width:100%; height:100%; border:1.5px solid var(--ink-4); border-radius:4px; overflow:hidden; display:flex; flex-direction:column; }
.wf-table-row { display:flex; border-bottom:1px solid var(--wire); flex:1; }
.wf-table-row:first-child { background:var(--ink-4); }
.wf-table-cell { flex:1; border-right:1px solid var(--wire); display:flex; align-items:center; padding:0 6px; }
.wf-table-cell::after { content:''; display:block; height:4px; background:rgba(255,255,255,0.6); border-radius:2px; width:70%; }
.wf-table-row:not(:first-child) .wf-table-cell::after { background:var(--ink-4); }
.wf-modal { width:100%; height:100%; border:1.5px solid var(--ink-3); border-radius:6px; background:var(--paper); box-shadow:4px 4px 0 var(--ink-4); display:flex; flex-direction:column; }
.wf-modal-hdr { background:var(--ink-4); padding:6px 10px; display:flex; align-items:center; gap:8px; border-bottom:1px solid var(--wire); }
.wf-modal-hdr span { display:block; height:5px; flex:1; background:rgba(255,255,255,0.6); border-radius:2px; }
.wf-modal-hdr::after { content:'✕'; font-size:0.6rem; color:rgba(255,255,255,0.6); margin-left:auto; }
.wf-modal-body { flex:1; padding:8px; display:flex; flex-direction:column; gap:5px; }
.wf-modal-body span { display:block; height:5px; background:var(--ink-4); border-radius:2px; }
.wf-modal-body span:nth-child(2) { width:80%; }
.wf-heading { width:100%; height:100%; display:flex; align-items:center; }
.wf-heading span { display:block; height:12px; width:70%; background:var(--ink-3); border-radius:3px; }
.wf-frame { width:100%; height:100%; border:2px solid var(--ink-3); border-radius:6px; background:transparent; position:relative; }
.wf-frame-label { position:absolute; top:-18px; left:0; font-family:var(--mono); font-size:0.65rem; color:var(--ink-3); }
.wf-rect { width:100%; height:100%; border:1.5px solid var(--ink-4); border-radius:4px; background:var(--paper-3); }
.wf-toggle { display:flex; align-items:center; gap:8px; height:100%; padding:0 4px; }
.wf-toggle-track { width:32px; height:18px; border:1.5px solid var(--ink-3); border-radius:9px; position:relative; flex-shrink:0; }
.wf-toggle-thumb { position:absolute; width:12px; height:12px; background:var(--ink-3); border-radius:50%; top:1px; left:2px; }
.wf-toggle-lbl { font-family:var(--mono); font-size:0.65rem; color:var(--ink-3); }
.wf-checkbox { display:flex; align-items:center; gap:8px; height:100%; padding:0 4px; }
.wf-checkbox-box { width:14px; height:14px; border:1.5px solid var(--ink-3); border-radius:3px; flex-shrink:0; display:flex; align-items:center; justify-content:center; font-size:0.55rem; color:var(--ink-3); }
.wf-checkbox-lbl { font-family:var(--mono); font-size:0.65rem; color:var(--ink-3); }
.wf-avatar { width:100%; height:100%; border-radius:50%; border:1.5px solid var(--ink-4); background:var(--paper-3); display:flex; align-items:center; justify-content:center; font-size:1.2rem; color:var(--ink-4); }
.wf-badge { width:100%; height:100%; background:var(--ink-4); border-radius:10px; display:flex; align-items:center; justify-content:center; font-family:var(--mono); font-size:0.6rem; color:rgba(255,255,255,0.7); }
.wf-divider { width:100%; height:100%; display:flex; align-items:center; }
.wf-divider::after { content:''; display:block; width:100%; height:1.5px; background:var(--ink-4); }
.wf-progress { width:100%; height:100%; display:flex; flex-direction:column; justify-content:center; gap:4px; }
.wf-progress-track { width:100%; height:8px; border:1.5px solid var(--ink-4); border-radius:4px; overflow:hidden; }
.wf-progress-bar { height:100%; width:65%; background:var(--ink-3); }
.wf-note { width:100%; height:100%; background:#fef9c3; border:1px solid #fde047; border-radius:3px; padding:8px; font-family:var(--mono); font-size:0.65rem; color:#713f12; box-shadow:2px 2px 0 #fde047; overflow:hidden; }

/* ============================================================ SÉLECTION */
.sel-box {
  position: absolute;
  border: 1.5px solid var(--accent);
  background: rgba(37,99,235,0.05);
  pointer-events: none;
  z-index: 999;
  border-radius: 2px;
}

/* ============================================================ MENU CONTEXTUEL */
.ctx-menu {
  position: fixed;
  background: var(--paper);
  border: 1px solid var(--wire);
  border-radius: var(--radius);
  padding: 4px;
  z-index: 9999;
  box-shadow: var(--shadow-lg);
  min-width: 165px;
}
.ctx-item {
  padding: 6px 12px;
  font-size: 0.77rem;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background 0.08s;
}
.ctx-item:hover        { background: var(--accent-light); color: var(--accent); }
.ctx-item.danger:hover { background: rgba(220,38,38,0.08); color: var(--accent-2); }
.ctx-sep { height: 1px; background: var(--wire); margin: 3px 0; }
.ctx-key { margin-left: auto; font-family: var(--mono); font-size: 0.62rem; color: var(--ink-3); }

/* ============================================================ TOAST */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(16px);
  background: var(--ink);
  color: #fff;
  padding: 8px 20px;
  border-radius: 20px;
  font-size: 0.77rem;
  font-family: var(--mono);
  z-index: 9999;
  opacity: 0;
  transition: all 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
  pointer-events: none;
  white-space: nowrap;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ============================================================ RÈGLES */
.ruler-h, .ruler-v { position: absolute; background: var(--paper-2); pointer-events: none; z-index: 10; }
.ruler-h { top: 0; left: 20px; right: 0; height: 20px; border-bottom: 1px solid var(--wire); overflow: hidden; }
.ruler-v { top: 20px; left: 0; bottom: 0; width: 20px; border-right: 1px solid var(--wire); overflow: hidden; }
.ruler-corner { position: absolute; top: 0; left: 0; width: 20px; height: 20px; background: var(--paper-2); border-right: 1px solid var(--wire); border-bottom: 1px solid var(--wire); z-index: 11; }

/* ============================================================ SCROLLBAR */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--wire); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-4); }

/* ============================================================ RESPONSIVE MOBILE */
.btn-toggle-left,
.btn-toggle-right { display: none; }

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  top: var(--header);
  background: rgba(26,23,20,0.45);
  z-index: 299;
  cursor: pointer;
}

@media (max-width: 768px) {
  .app {
    grid-template-columns: 1fr;
  }

  /* Panels become slide-in drawers */
  .left-panel {
    position: fixed;
    top: var(--header);
    left: 0;
    bottom: 0;
    width: min(var(--panel), 82vw);
    transform: translateX(-100%);
    transition: transform 0.26s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 300;
    box-shadow: var(--shadow-lg);
  }

  .right-panel {
    position: fixed;
    top: var(--header);
    right: 0;
    bottom: 0;
    width: min(var(--rpanel), 88vw);
    transform: translateX(100%);
    transition: transform 0.26s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 300;
    box-shadow: var(--shadow-lg);
  }

  .app.panel-left-open  .left-panel  { transform: translateX(0); }
  .app.panel-right-open .right-panel { transform: translateX(0); }

  .app.panel-left-open  .mobile-overlay,
  .app.panel-right-open .mobile-overlay { display: block; }

  .btn-toggle-left,
  .btn-toggle-right { display: flex; }

  /* Scrollable header to fit all tools */
  .header {
    padding: 0 6px;
    gap: 2px;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .header::-webkit-scrollbar { display: none; }

  /* Smaller separators on mobile */
  .header-sep { flex-shrink: 0; }

  /* Slightly larger touch targets */
  .tool-btn {
    width: 38px;
    height: 38px;
    flex-shrink: 0;
  }

  .hbtn { flex-shrink: 0; }

  /* Adjust toast for mobile */
  .toast { bottom: 16px; font-size: 0.72rem; }

  /* Context menu touch-friendly */
  .ctx-item { padding: 10px 14px; font-size: 0.82rem; }
}

@media (max-width: 480px) {
  /* On very small screens hide the zoom display */
  .zoom-display { display: none; }

  /* Hide export/import (keep Clear) to save space on tiny screens */
  #btnExportJSON,
  #btnImportJSON { display: none; }
}