/* ══════════════════════════════════════════════════════════════════
   LaserWeb — Dark theme UI
   ══════════════════════════════════════════════════════════════════ */

:root {
  --bg:          #1e1e1e;
  --bg-panel:    #252526;
  --bg-input:    #3c3c3c;
  --bg-hover:    #2a2d2e;
  --bg-active:   #094771;
  --border:      #3e3e42;
  --border-light:#555;
  --text:        #cccccc;
  --text-dim:    #858585;
  --text-bright: #ffffff;
  --accent:      #0078d4;
  --accent-hover:#1177bb;
  --success:     #4ec9b0;
  --warn:        #ce9178;
  --danger:      #f44747;
  --info:        #569cd6;

  --layer-cut:     #f44336;
  --layer-engrave: #00bcd4;
  --layer-fill:    #4caf50;
  --layer-mark:    #ff9800;
  --layer-skip:    #9e9e9e;

  --toolbar-h:   44px;
  --tools-w:     48px;
  --right-w:     260px;
  --bottom-h:    200px;
  --panel-hdr:   32px;
  --radius:      4px;
  --font:        -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono:        'Cascadia Code', 'Fira Code', 'Consolas', monospace;
}

/* ── Light theme override ────────────────────────────────────────── */
body.theme-light {
  --bg:          #f5f5f5;
  --bg-panel:    #ffffff;
  --bg-input:    #ebebeb;
  --bg-hover:    #e0e0e0;
  --bg-active:   #cce4f7;
  --border:      #d0d0d0;
  --border-light:#bbb;
  --text:        #333333;
  --text-dim:    #777777;
  --text-bright: #000000;
  --accent:      #0066bb;
  --accent-hover:#0055aa;
  --success:     #1a7a5e;
  --warn:        #9a5a00;
  --danger:      #cc2222;
  --info:        #2266aa;
}
body.theme-light #toolbar     { background: #e8e8e8; }
body.theme-light #canvas-area { background: #d8d8d8; }
body.theme-light #connection-strip { background: #eeeeee; }
body.theme-light #bottom-panel     { background: #f0f0f0; }

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%; overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
}

#app {
  display: grid;
  grid-template-rows: var(--toolbar-h) 1fr var(--bottom-h);
  height: 100vh;
  width: 100vw;
  overflow: hidden;   /* hard clamp — nothing escapes the viewport */
  position: fixed;    /* anchors to viewport, prevents body scroll */
  top: 0; left: 0;
}

/* ── Scrollbars ──────────────────────────────────────────────────── */
::-webkit-scrollbar            { width: 8px; height: 8px; }
::-webkit-scrollbar-track      { background: var(--bg); }
::-webkit-scrollbar-thumb      { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover{ background: var(--border-light); }

/* ── Toolbar ─────────────────────────────────────────────────────── */
#toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 8px;
  background: #333;
  border-bottom: 1px solid var(--border);
  user-select: none;
  flex-shrink: 0;
  overflow: visible;  /* dropdowns must escape the toolbar row */
  min-width: 0;
  position: relative;
  z-index: 100;
}

.toolbar-actions {
  display: flex; align-items: center; gap: 2px;
  flex: 1;
  min-width: 0;
  overflow: visible;  /* allow dropdowns to show below */
}

.toolbar-brand {
  display: flex;
  align-items: center;
  gap: 6px;
  padding-right: 12px;
  border-right: 1px solid var(--border);
  margin-right: 4px;
  flex-shrink: 0;
}
.brand-icon { width: 20px; height: 20px; color: var(--accent); }
.brand-name {
  font-size: 14px; font-weight: 600; color: var(--text-bright);
  letter-spacing: 0.03em;
}
.brand-version {
  font-size: 10px; color: var(--text-dim); background: var(--bg-input);
  padding: 1px 5px; border-radius: var(--radius); margin-left: -2px;
}

.toolbar-group { display: flex; align-items: center; gap: 1px; }

/* ── Toolbar dropdown menus ─────────────────────────────────────── */
.tb-menu {
  position: relative;
  display: inline-flex;
}
.tb-menu-btn {
  display: flex; align-items: center; gap: 4px;
  height: 28px; padding: 0 8px;
  background: none; border: none; border-radius: var(--radius);
  color: var(--text); font-size: 12px; font-family: var(--font);
  cursor: pointer; white-space: nowrap;
  transition: background 0.1s;
}
.tb-menu-btn:hover, .tb-menu.open .tb-menu-btn { background: var(--bg-hover); color: var(--text-bright); }
.tb-menu-btn i { width: 14px; height: 14px; }
.tb-chevron { width: 11px !important; height: 11px !important; opacity: 0.6; }

.tb-dropdown {
  display: none;
  position: fixed;   /* escapes any overflow:hidden ancestor */
  min-width: 200px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
  z-index: 9000;
  padding: 4px 0;
}
.tb-menu.open .tb-dropdown { display: block; }

.tb-drop-item {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 6px 12px;
  background: none; border: none;
  color: var(--text); font-size: 12px; font-family: var(--font);
  cursor: pointer; text-align: left; white-space: nowrap;
}
.tb-drop-item:hover { background: var(--bg-hover); color: var(--text-bright); }
.tb-drop-item i { width: 14px; height: 14px; flex-shrink: 0; opacity: 0.75; }
.tb-drop-item:hover i { opacity: 1; }
.tb-drop-sep { height: 1px; background: var(--border); margin: 4px 0; }
.tb-drop-kbd {
  margin-left: auto; padding-left: 16px;
  font-size: 10px; color: var(--text-dim);
  font-family: var(--mono);
}
.tb-drop-inline {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 12px;
  color: var(--text); font-size: 12px;
}
.toolbar-sep   { width: 1px; height: 24px; background: var(--border); margin: 0 4px; flex-shrink: 0; }

.tb-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 4px 8px;
  background: transparent;
  border: none; border-radius: var(--radius);
  color: var(--text); cursor: pointer;
  font-size: 12px; white-space: nowrap;
  transition: background 0.1s, color 0.1s;
}
.tb-btn:hover   { background: var(--bg-hover); color: var(--text-bright); }
.tb-btn:active  { background: var(--bg-active); }
.tb-btn:disabled{ opacity: 0.4; cursor: not-allowed; }
.tb-btn svg { width: 15px; height: 15px; flex-shrink: 0; }
/* toolbar buttons are icon-only — no span labels in the toolbar */

.tb-btn-primary { color: var(--accent); }
.tb-btn-primary:hover { background: rgba(0,120,212,0.15); color: #4ab3f4; }
.tb-btn-success { color: var(--success); }
.tb-btn-success:hover { background: rgba(78,201,176,0.15); }
.tb-btn-warning { color: var(--warn); }
.tb-btn-danger  { color: var(--danger); }
.tb-btn-danger:hover { background: rgba(244,71,71,0.15); }

/* ── Connection strip (bottom bar, full width) ───────────────────── */
#connection-strip {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  height: 36px;
  background: #2a2a2a;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  overflow: hidden;
}

.conn-status {
  display: flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--text-dim);
  flex-shrink: 0;
}
.conn-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--danger); flex-shrink: 0;
  transition: background 0.3s;
}
.conn-dot.connected { background: var(--success); box-shadow: 0 0 6px var(--success); }

#protocol-select {
  background: var(--bg-input); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius); padding: 2px 6px;
  font-size: 12px; cursor: pointer; flex-shrink: 0;
}

.conn-sep {
  width: 1px; height: 20px; background: var(--border);
  flex-shrink: 0; margin: 0 2px;
}
.conn-spacer { flex: 1; }

.coord-display {
  font-family: var(--mono); font-size: 11px;
  color: var(--text-dim); white-space: nowrap; flex-shrink: 0;
}
.coord-display span { color: var(--text); }

/* Connection-strip buttons */
.cs-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 3px 9px; flex-shrink: 0;
  background: transparent;
  border: none; border-radius: var(--radius);
  color: var(--text); cursor: pointer;
  font-size: 12px; font-family: var(--font); white-space: nowrap;
  transition: background 0.1s, color 0.1s;
}
.cs-btn:hover    { background: var(--bg-hover); color: var(--text-bright); }
.cs-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.cs-btn svg      { width: 14px; height: 14px; flex-shrink: 0; }
.cs-btn-primary  { color: var(--accent); }
.cs-btn-primary:hover { background: rgba(0,120,212,0.15); color: #4ab3f4; }
.cs-btn-success  { color: var(--success); }
.cs-btn-success:hover { background: rgba(78,201,176,0.15); }
.cs-btn-warning  { color: var(--warn); }
.cs-btn-danger   { color: var(--danger); }
.cs-btn-danger:hover { background: rgba(244,71,71,0.15); }

/* Inline progress bar in connection strip */
.progress-bar-inline {
  width: 120px; height: 5px; background: var(--bg-input);
  border-radius: 3px; overflow: hidden; flex-shrink: 0;
}
#job-progress-strip { display: flex; align-items: center; gap: 6px; }

/* ── Simulation bar (overlaid on canvas-container) ──────────────── */
#sim-bar {
  position: absolute; bottom: 8px; left: 50%;
  transform: translateX(-50%);
  display: none; align-items: center; gap: 8px;
  background: rgba(30,30,30,0.92);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 14px;
  z-index: 50;
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
  white-space: nowrap;
  pointer-events: auto;
}
#sim-bar.visible { display: flex; }
.sim-btn {
  background: transparent; border: none; color: var(--text);
  cursor: pointer; padding: 2px 5px; border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.1s, color 0.1s;
}
.sim-btn:hover { background: var(--bg-hover); color: var(--text-bright); }
.sim-btn svg   { width: 14px; height: 14px; }
#sim-scrub {
  width: 160px; accent-color: var(--accent);
  cursor: pointer;
}
#sim-time-label {
  font-family: var(--mono); font-size: 11px; color: var(--text-dim);
  min-width: 60px; text-align: right;
}
#sim-speed {
  background: var(--bg-input); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius);
  padding: 2px 4px; font-size: 11px; cursor: pointer;
}

/* ── Workspace ────────────────────────────────────────────────────── */
#workspace {
  display: grid;
  /* minmax(0, X) prevents content from inflating fixed tracks beyond their declared size */
  grid-template-columns: minmax(0, var(--tools-w)) minmax(0, 1fr) 5px minmax(0, var(--right-w));
  overflow: hidden;
  min-height: 0;
}

/* ── Tool palette ────────────────────────────────────────────────── */
#tools-panel {
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column; align-items: center;
  padding: 6px 0; gap: 2px; overflow: hidden;
  min-height: 0;
  min-width: 0;  /* grid item: don't grow beyond track */
}
.tool-group { display: flex; flex-direction: column; align-items: center; gap: 2px; }
.tool-separator { width: 28px; height: 1px; background: var(--border); margin: 4px 0; }

.tool-btn {
  width: 36px; height: 36px; display: flex; align-items: center; justify-content: center;
  background: transparent; border: none; border-radius: var(--radius);
  color: var(--text-dim); cursor: pointer;
  transition: background 0.1s, color 0.1s;
  position: relative;
}
.tool-btn:hover { background: var(--bg-hover); color: var(--text-bright); }
.tool-btn.active {
  background: var(--bg-active); color: var(--accent);
  border-left: 2px solid var(--accent);
}
.tool-btn svg { width: 16px; height: 16px; }

/* ── Canvas area wrapper (tab bar + canvas stacked vertically) ────── */
#canvas-area {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
}

/* ── Document Tabs bar ───────────────────────────────────────────── */
#tab-bar {
  display: flex;
  align-items: center;
  background: var(--bg-mid);
  border-bottom: 1px solid var(--border);
  height: 32px;
  flex-shrink: 0;
  overflow: hidden;
}
#tab-list {
  display: flex;
  flex: 1;
  overflow-x: auto;
  height: 100%;
}
#btn-tab-new {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
}
#btn-tab-new:hover { color: var(--text-bright); background: var(--bg-hover); }

/* ── Canvas area ─────────────────────────────────────────────────── */
#canvas-container {
  flex: 1;          /* fill remaining height inside #canvas-area */
  overflow: hidden;
  position: relative;
  background: #2a2a2a;
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
}
#canvas-rulers {
  display: grid;
  grid-template-columns: 20px 1fr;
  grid-template-rows: 20px 1fr;
  width: 100%;
  flex: 1;         /* fill available height in canvas-container */
  min-height: 0;
  overflow: hidden;
}
#ruler-corner {
  background: #333; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border);
}
#ruler-h {
  grid-column: 2; grid-row: 1;
  background: #2d2d2d; border-bottom: 1px solid var(--border);
  width: 100%;
}
#ruler-v {
  grid-column: 1; grid-row: 2;
  background: #2d2d2d; border-right: 1px solid var(--border);
  height: 100%;
}
#canvas-viewport {
  grid-column: 2; grid-row: 2;
  overflow: hidden;
  position: relative;
  width: 100%;
  height: 100%;    /* fill the grid cell so ResizeObserver gets correct dimensions */
}
#canvas-viewport canvas { display: block; }

/* ── Right panel ─────────────────────────────────────────────────── */
#right-panel {
  display: flex; flex-direction: column;
  border-left: 1px solid var(--border);
  overflow: hidden;
  min-height: 0;
  min-width: 0;
}

.side-panel {
  display: flex; flex-direction: column;
  border-bottom: 1px solid var(--border);
  min-height: 0;
}

#layers-panel  { flex: 0 0 auto; max-height: 220px; overflow: hidden; display: flex; flex-direction: column; }
#properties-panel { flex: 1; overflow-y: auto; }

.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 8px;
  height: var(--panel-hdr);
  background: #2d2d2d;
  border-bottom: 1px solid var(--border);
  font-size: 11px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--text-dim);
  flex-shrink: 0;
}
.panel-header-actions { display: flex; gap: 2px; }

.icon-btn {
  width: 22px; height: 22px; display: flex; align-items: center; justify-content: center;
  background: transparent; border: none; border-radius: 3px;
  color: var(--text-dim); cursor: pointer;
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text-bright); }
.icon-btn svg { width: 13px; height: 13px; }

/* ── Layers list ─────────────────────────────────────────────────── */
#layers-list {
  overflow-y: auto; flex: 1;
}
.layer-row {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 8px;
  cursor: pointer;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: background 0.1s;
}
.layer-row:hover { background: var(--bg-hover); }
.layer-row.active { background: #1e3a5f; border-left: 2px solid var(--accent); }

.layer-vis-btn {
  width: 18px; height: 18px; display: flex; align-items: center; justify-content: center;
  background: none; border: none; color: var(--text-dim); cursor: pointer; flex-shrink: 0;
}
.layer-vis-btn svg { width: 12px; height: 12px; }
.layer-color-swatch {
  width: 12px; height: 12px; border-radius: 2px; flex-shrink: 0;
}
.layer-name { flex: 1; font-size: 12px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layer-op-badge {
  font-size: 9px; padding: 1px 4px; border-radius: 3px;
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; flex-shrink: 0;
}
.op-cut     { background: rgba(244,67,54,0.2);  color: #f44336; }
.op-engrave { background: rgba(0,188,212,0.2);  color: #00bcd4; }
.op-fill    { background: rgba(76,175,80,0.2);  color: #4caf50; }
.op-mark    { background: rgba(255,152,0,0.2);  color: #ff9800; }
.op-skip    { background: rgba(158,158,158,0.15); color: #9e9e9e; }

/* ── Properties panel ────────────────────────────────────────────── */
.properties-content { padding: 8px; display: flex; flex-direction: column; gap: 6px; }
.prop-row {
  display: flex; align-items: center; gap: 8px;
  min-height: 26px;
}
.prop-row label {
  font-size: 11px; color: var(--text-dim);
  flex: 0 0 80px; white-space: nowrap; overflow: hidden;
}
.prop-row label small { font-size: 9px; opacity: 0.7; }
.prop-row input[type="number"],
.prop-row select,
.prop-row input[type="text"],
.prop-row textarea {
  flex: 1; background: var(--bg-input); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius); padding: 3px 6px;
  font-size: 12px; font-family: var(--font);
  min-width: 0;
}
.prop-row input:focus, .prop-row select:focus, .prop-row textarea:focus {
  outline: none; border-color: var(--accent);
}
.prop-row textarea { resize: vertical; }
.prop-row-checkbox { justify-content: space-between; }
.prop-row-checkbox input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; }

.prop-input-row { display: flex; align-items: center; gap: 4px; flex: 1; min-width: 0; }
.prop-input-row .slider { flex: 1; accent-color: var(--accent); cursor: pointer; }
.prop-num-small { width: 46px !important; flex: 0 0 46px !important; text-align: center; }
.prop-unit { font-size: 10px; color: var(--text-dim); flex-shrink: 0; }

.prop-section { border-top: 1px solid var(--border); padding-top: 6px; margin-top: 4px; }
.prop-section-title {
  font-size: 10px; font-weight: 600; text-transform: uppercase;
  color: var(--text-dim); letter-spacing: 0.05em; margin-bottom: 6px;
}
.prop-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.hidden { display: none !important; }

.prop-toggle {
  padding: 3px 7px; min-width: 28px; justify-content: center;
  border: 1px solid var(--border); border-radius: 3px;
  font-size: 12px; line-height: 1;
}
.prop-toggle.active {
  background: var(--accent); color: #fff; border-color: var(--accent);
}

/* ── Bottom panel ────────────────────────────────────────────────── */
#bottom-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
  grid-template-rows: 36px minmax(0, 1fr);   /* connection strip + console/jog */
  border-top: 1px solid var(--border);
  overflow: hidden;
  min-height: 0;
  min-width: 0;
}

/* console and jog sit on row 2 */
#console-panel { grid-row: 2; grid-column: 1; }
#jog-panel     { grid-row: 2; grid-column: 2; }

/* Console */
#console-panel {
  display: flex; flex-direction: column;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  overflow: hidden;
  min-width: 0;
}
#console-output {
  flex: 1; overflow-y: auto; padding: 4px 8px;
  font-family: var(--mono); font-size: 11px; line-height: 1.6;
}
.console-line { padding: 1px 0; }
.console-tx    { color: #ce9178; }
.console-rx    { color: #9cdcfe; }
.console-info  { color: var(--text-dim); }
.console-warn  { color: #dcdcaa; }
.console-error { color: var(--danger); }
#console-input-row {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 8px; border-top: 1px solid var(--border);
  background: #2d2d2d;
}
.console-prompt { color: var(--text-dim); font-family: var(--mono); }
#console-input {
  flex: 1; background: transparent; border: none;
  color: var(--text); font-family: var(--mono); font-size: 12px;
  outline: none;
}
#btn-console-send {
  background: none; border: none; color: var(--text-dim); cursor: pointer;
}
#btn-console-send svg { width: 14px; height: 14px; }
#btn-console-send:hover { color: var(--text-bright); }

/* Jog panel */
#jog-panel {
  display: flex; flex-direction: column;
  background: var(--bg-panel); overflow: hidden;
  min-width: 0;
}
.jog-content {
  display: flex; gap: 12px; padding: 8px 10px; flex: 1; align-items: stretch;
  overflow: hidden; min-height: 0;
}

.jog-grid {
  display: grid; grid-template-columns: repeat(3, 36px);
  grid-template-rows: repeat(3, 36px); gap: 2px; flex-shrink: 0;
}
.jog-btn {
  display: flex; align-items: center; justify-content: center;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); cursor: pointer;
  transition: background 0.1s;
}
.jog-btn:hover  { background: var(--bg-active); color: var(--text-bright); }
.jog-btn:active { background: var(--accent); }
.jog-btn svg { width: 14px; height: 14px; }
.jog-home-btn { background: #2d3a2d; border-color: #3a5a3a; }
.jog-home-btn:hover { background: #3a5a3a; }

.jog-controls { flex: 1; display: flex; flex-direction: column; gap: 8px; overflow-y: auto; min-height: 0; }

.step-size-group {
  display: flex; align-items: center; gap: 4px;
}
.step-size-group label { font-size: 10px; color: var(--text-dim); flex-shrink: 0; }
.step-btns { display: flex; gap: 2px; }
.step-btn {
  padding: 2px 7px; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text-dim); cursor: pointer; font-size: 11px;
}
.step-btn:hover { border-color: var(--accent); color: var(--text); }
.step-btn.active { background: var(--accent); border-color: var(--accent); color: white; }
.step-unit { font-size: 10px; color: var(--text-dim); }

.machine-btns { display: flex; flex-wrap: wrap; gap: 4px; }
.machine-btn {
  display: flex; align-items: center; gap: 4px; padding: 4px 8px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); cursor: pointer; font-size: 11px;
  transition: background 0.1s;
}
.machine-btn:hover { background: var(--bg-hover); border-color: var(--border-light); }
.machine-btn svg { width: 12px; height: 12px; }
.machine-btn-warn { color: var(--warn); border-color: rgba(206,145,120,0.3); }
.machine-btn-warn:hover { background: rgba(206,145,120,0.1); }

/* Progress bar */
#job-progress { padding: 6px 10px; border-top: 1px solid var(--border); }
.progress-bar  { height: 6px; background: var(--bg-input); border-radius: 3px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--accent); transition: width 0.2s; border-radius: 3px; }
.progress-info { display: flex; justify-content: space-between; margin-top: 3px; font-size: 10px; color: var(--text-dim); }

/* ── Modals ───────────────────────────────────────────────────────── */
#modal-overlay {
  position: fixed; inset: 0; z-index: 1000;
  background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
}
.modal {
  position: fixed; z-index: 1001;
  top: 50%; left: 50%; transform: translate(-50%, -50%);
  background: var(--bg-panel); border: 1px solid var(--border);
  border-radius: 6px; min-width: 480px; max-width: 680px;
  max-height: 80vh; display: flex; flex-direction: column;
  box-shadow: 0 16px 48px rgba(0,0,0,0.6);
}
.modal-sm { min-width: 320px; max-width: 420px; }
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  font-weight: 600; font-size: 13px;
  flex-shrink: 0;
}
.modal-body { padding: 12px 16px; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; padding-top: 8px; border-top: 1px solid var(--border); }

.btn-primary, .btn-secondary {
  padding: 6px 16px; border-radius: var(--radius); border: none;
  cursor: pointer; font-size: 12px; font-family: var(--font);
  transition: background 0.1s;
}
.btn-primary   { background: var(--accent); color: white; }
.btn-primary:hover   { background: var(--accent-hover); }
.btn-secondary { background: var(--bg-input); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-hover); border-color: var(--border-light); }

/* Material library */
.material-search input {
  width: 100%; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); padding: 6px 10px; font-size: 13px;
}
.material-search input:focus { outline: none; border-color: var(--accent); }

#material-categories { display: flex; flex-wrap: wrap; gap: 4px; padding: 4px 0; }
.cat-chip {
  padding: 2px 10px; border-radius: 12px; font-size: 11px;
  background: var(--bg-input); border: 1px solid var(--border); color: var(--text-dim);
  cursor: pointer;
}
.cat-chip:hover { border-color: var(--accent); color: var(--text); }

#material-list {
  display: flex; flex-direction: column; gap: 4px;
  max-height: 320px; overflow-y: auto;
}
.material-item {
  padding: 8px 10px; border: 1px solid var(--border);
  border-radius: var(--radius); cursor: pointer;
  transition: background 0.1s, border-color 0.1s;
}
.material-item:hover  { background: var(--bg-hover); border-color: var(--border-light); }
.material-item.selected { background: #1e3a5f; border-color: var(--accent); }
.material-item.material-hazardous { border-color: var(--danger); }
.material-item.material-hazardous:hover { background: rgba(244,71,71,0.08); }
.material-name { font-weight: 600; font-size: 13px; }
.material-meta { font-size: 11px; color: var(--text-dim); margin-top: 1px; }
.material-ops  { display: flex; gap: 4px; margin-top: 4px; flex-wrap: wrap; }
.op-badge {
  font-size: 9px; padding: 1px 6px; border-radius: 3px;
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em;
}
.material-notes {
  font-size: 11px; color: var(--text-dim); margin-top: 4px;
  font-style: italic; opacity: 0.8;
}

/* Recent files list */
.recent-file-item {
  display: flex; align-items: center; gap: 12px;
  padding: 8px; border-radius: var(--radius);
  cursor: pointer; transition: background 0.1s;
  border: 1px solid transparent;
}
.recent-file-item:hover { background: var(--bg-hover); border-color: var(--border); }
.recent-thumb {
  width: 64px; height: 48px; object-fit: cover;
  border-radius: 3px; border: 1px solid var(--border); flex-shrink: 0;
}
.recent-thumb-placeholder {
  width: 64px; height: 48px; background: var(--bg-input);
  border-radius: 3px; border: 1px solid var(--border); flex-shrink: 0;
}
.recent-info { display: flex; flex-direction: column; gap: 2px; }
.recent-name { font-size: 13px; font-weight: 500; }
.recent-date { font-size: 11px; color: var(--text-dim); }

/* Keyboard shortcut overlay */
.shortcut-group { break-inside: avoid; margin-bottom: 16px; }
.shortcut-title {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-dim); margin-bottom: 6px; font-weight: 600;
}
.shortcut-row {
  display: flex; align-items: center; gap: 10px;
  padding: 3px 0; font-size: 12px;
}
.shortcut-row kbd {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 28px; padding: 2px 6px;
  background: var(--bg-input); border: 1px solid var(--border-light);
  border-radius: 3px; font-family: var(--mono); font-size: 11px;
  color: var(--text-bright); white-space: nowrap; flex-shrink: 0;
}
.shortcut-row span { color: var(--text-dim); }

/* Fixture list */
#fixture-list { display: flex; flex-direction: column; gap: 4px; }
.fixture-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px; background: var(--bg-input); border-radius: var(--radius);
  font-size: 12px;
}
.fixture-item small { color: var(--text-dim); font-size: 10px; }

/* ── Toast notifications ────────────────────────────────────────── */
#toast-container {
  position: fixed; bottom: 16px; right: 16px; z-index: 2000;
  display: flex; flex-direction: column-reverse; gap: 8px; pointer-events: none;
}
.toast {
  padding: 8px 16px; border-radius: var(--radius);
  font-size: 12px; max-width: 340px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  animation: slide-in 0.2s ease;
  pointer-events: auto;
}
.toast-info    { background: #1e3a5f; color: #9cdcfe; border-left: 3px solid var(--info); }
.toast-success { background: #1e3a2f; color: #4ec9b0; border-left: 3px solid var(--success); }
.toast-warn    { background: #3a2e1e; color: #dcdcaa; border-left: 3px solid var(--warn); }
.toast-error   { background: #3a1e1e; color: #f48771; border-left: 3px solid var(--danger); }
.toast.fade-out { opacity: 0; transition: opacity 0.4s; }

@keyframes slide-in {
  from { transform: translateX(16px); opacity: 0; }
  to   { transform: translateX(0);    opacity: 1; }
}

/* ── Misc ────────────────────────────────────────────────────────── */
.text-muted { color: var(--text-dim); font-size: 12px; }

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button { opacity: 1; }

/* ── Live overrides panel ────────────────────────────────────────── */
#overrides-panel {
  padding: 6px 12px 8px;
  border-top: 1px solid var(--border);
  background: var(--bg-panel);
  display: flex; flex-direction: column; gap: 4px;
}
#overrides-panel.hidden { display: none; }
.overrides-row {
  display: flex; align-items: center; gap: 4px;
}
.overrides-label {
  font-size: 11px; color: var(--text-dim);
  width: 40px; flex-shrink: 0;
}
.ov-btn {
  font-size: 11px; padding: 2px 6px;
  background: var(--bg-input); color: var(--text);
  border: 1px solid var(--border); border-radius: 3px;
  cursor: pointer; line-height: 1.4;
}
.ov-btn:hover { background: var(--bg-hover); }
.ov-btn.ov-reset { color: var(--accent); }
.ov-val {
  font-size: 12px; font-weight: 600; color: var(--text-bright);
  width: 36px; text-align: center;
}

/* ── Right-click context menu ────────────────────────────────────── */
#ctx-menu {
  position: fixed; z-index: 3000;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  padding: 4px 0;
  min-width: 180px;
  font-size: 13px;
}
#ctx-menu.hidden { display: none; }
.ctx-item {
  display: flex; align-items: center; gap: 8px;
  width: 100%; padding: 6px 14px;
  background: none; border: none;
  color: var(--text); cursor: pointer; text-align: left;
}
.ctx-item svg { width: 14px; height: 14px; flex-shrink: 0; }
.ctx-item:hover { background: var(--bg-active); color: var(--text-bright); }
.ctx-sep {
  height: 1px; background: var(--border);
  margin: 3px 0;
}
.ctx-submenu-label {
  padding: 4px 14px 2px;
  font-size: 10px; text-transform: uppercase;
  color: var(--text-dim); letter-spacing: 0.06em;
}
#ctx-layer-items .ctx-item { padding-left: 22px; }

/* ── Alarm / limit-pin indicators ───────────────────────────────── */
#status-pins {
  display: flex; align-items: center; gap: 3px; margin: 0 6px;
}
#status-pins.hidden { display: none; }
.pin-badge {
  font-size: 10px; font-weight: 700; padding: 1px 4px;
  border-radius: 3px;
  background: var(--bg-input); color: var(--text-dim);
  border: 1px solid var(--border);
  opacity: 0.35; transition: opacity 0.15s, background 0.15s;
}
.pin-badge.active {
  opacity: 1; background: #5a1b1b; color: #f48771;
  border-color: var(--danger);
}
#alarm-badge {
  display: flex; align-items: center; gap: 5px;
  padding: 2px 8px; border-radius: 4px;
  background: #5a1b1b; color: #f48771;
  font-size: 11px; font-weight: 700;
  border: 1px solid var(--danger);
  animation: alarm-pulse 1s ease infinite;
}
#alarm-badge.hidden { display: none; }
@keyframes alarm-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.6; }
}

/* ── Safety checklist modal ─────────────────────────────────────── */
.safety-check {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 13px; color: var(--text); cursor: pointer;
  padding: 4px 0;
}
.safety-check input[type="checkbox"] {
  width: 15px; height: 15px; margin-top: 1px; flex-shrink: 0;
  accent-color: var(--success); cursor: pointer;
}

/* ── Panel resize handles ────────────────────────────────────────── */
.resize-handle {
  width: 5px; cursor: col-resize;
  background: transparent;
  transition: background 0.15s;
  z-index: 10; position: relative;
}
.resize-handle:hover,
.resize-handle.dragging { background: var(--accent); }

/* ── Visible focus rings (keyboard accessibility) ────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius);
}
/* Suppress mouse-click focus rings (only show on keyboard nav) */
:focus:not(:focus-visible) { outline: none; }

/* ── Aux toggles (air, exhaust, coolant) ─────────────────────────── */
.aux-toggles {
  display: flex; gap: 4px; flex-wrap: wrap;
  padding: 6px 0 2px;
}
.aux-btn {
  display: flex; align-items: center; gap: 5px;
  padding: 4px 10px; border-radius: var(--radius);
  background: var(--bg-input); border: 1px solid var(--border);
  color: var(--text-dim); cursor: pointer; font-size: 11px;
  transition: background 0.1s, color 0.1s, border-color 0.1s;
}
.aux-btn svg { width: 13px; height: 13px; }
.aux-btn:hover { background: var(--bg-hover); color: var(--text); }
.aux-btn[aria-pressed="true"] {
  background: rgba(0,120,212,0.2); color: #4ab3f4;
  border-color: var(--accent);
}

/* ── User macros ─────────────────────────────────────────────────── */
.macros-section { padding-top: 6px; }
.macros-header {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 11px; color: var(--text-dim); text-transform: uppercase;
  letter-spacing: 0.06em; margin-bottom: 6px;
}
.macros-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px;
}
.macro-btn {
  padding: 5px 4px; font-size: 11px; text-align: center;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--text); cursor: pointer;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  transition: background 0.1s;
}
.macro-btn:hover { background: var(--bg-hover); color: var(--text-bright); }
.macro-btn:empty { opacity: 0.3; }
.macro-editor-row {
  display: grid; grid-template-columns: 120px 1fr;
  gap: 6px; align-items: start;
}
.macro-editor-row input[type="text"] {
  background: var(--bg-input); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius); padding: 4px 6px;
  font-size: 12px; width: 100%;
}
.macro-editor-row textarea {
  background: var(--bg-input); border: 1px solid var(--border);
  color: var(--text); border-radius: var(--radius); padding: 4px 6px;
  font-size: 11px; font-family: var(--mono); width: 100%;
  resize: vertical; min-height: 36px;
}

/* ── Document Tabs ─────────────────────────────────────────────────── */
.doc-tab {
  display: flex; align-items: center; gap: 6px;
  padding: 0 10px 0 12px; height: 100%; min-width: 100px; max-width: 180px;
  font-size: 12px; color: var(--text-muted); cursor: pointer;
  border-right: 1px solid var(--border); flex-shrink: 0;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  user-select: none; transition: background 0.1s;
}
.doc-tab:hover { background: var(--bg-hover); color: var(--text); }
.doc-tab.active { background: var(--bg); color: var(--text-bright); border-bottom: 2px solid var(--accent); }
.doc-tab-name { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.doc-tab-close {
  flex-shrink: 0; width: 16px; height: 16px; border: none; background: none;
  cursor: pointer; color: var(--text-muted); display: flex; align-items: center;
  justify-content: center; border-radius: 3px; padding: 0;
}
.doc-tab-close:hover { background: var(--bg-active); color: var(--text-bright); }

/* ── Tablet / Touch Layout ──────────────────────────────────────────────── */

/* Larger tap targets on touch devices */
@media (pointer: coarse) {
  .tb-btn, .cs-btn, .icon-btn {
    min-width: 36px;
    min-height: 36px;
  }
  .layer-item {
    min-height: 44px;
  }
  /* Bigger scroll thumb on touch */
  ::-webkit-scrollbar { width: 8px; height: 8px; }
  /* Prevent text selection during drag */
  canvas, #canvas-viewport { touch-action: none; user-select: none; }
}

/* Compact layout for small screens — shrink panels, keep the grid intact */
@media (max-width: 900px) {
  :root {
    --right-w: 200px;   /* narrower right panel on small screens */
  }
  #console-panel { max-height: 80px; }
  /* Collapse connection-strip buttons to icon-only */
  .cs-btn span { display: none; }
  .cs-btn { min-width: 32px; padding: 0 6px; }
}

/* Very small screens — hide right panel, show toggle button */
@media (max-width: 600px) {
  :root { --right-w: 0px; }
  #right-panel { display: none; }
  #resize-right { display: none; }
  #toolbar { flex-wrap: wrap; height: auto; padding: 4px; gap: 2px; }
  .toolbar-sep { display: none; }
  .toolbar-group { flex-wrap: wrap; }
  #panel-toggle-btn { display: flex !important; }
}

/* Panel toggle button (only shown on small screens) */
#panel-toggle-btn {
  display: none;
  position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%);
  z-index: 200; background: var(--accent); color: #fff;
  border: none; border-radius: 20px; padding: 8px 20px;
  font-size: 13px; cursor: pointer; box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}