/* ── Catppuccin Mocha palette ──────────────────────────────── */
:root {
  --bg:       #1e1e2e; --mantle:   #181825; --crust:    #11111b;
  --surface0: #313244; --surface1: #45475a; --surface2: #585b70;
  --overlay0: #6c7086; --overlay1: #7f849c; --text:     #cdd6f4;
  --subtext0: #a6adc8; --subtext1: #bac2de;
  --accent:   #89b4fa; --green:    #a6e3a1; --red:      #f38ba8;
  --yellow:   #f9e2af; --peach:    #fab387; --mauve:    #cba6f7;
  --teal:     #94e2d5; --sky:      #89dceb; --lavender: #b4befe;
  --pink:     #f5c2e7;
  --radius:   8px; --sidebar-w: 280px; --topbar-h: 52px;
  --trigbar-h: 0px; --statusbar-h: 20px; --transition: 0.18s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height:100%; background:var(--bg); color:var(--text);
  font-family:'Segoe UI',system-ui,sans-serif; font-size:14px; overflow:hidden; }
::-webkit-scrollbar { width:6px; }
::-webkit-scrollbar-track { background:var(--mantle); }
::-webkit-scrollbar-thumb { background:var(--surface1); border-radius:3px; }

/* ── uPlot overrides ─────────────────────────────────────────── */
.uplot { background:transparent !important; }
.uplot .u-over { cursor: crosshair; }
.uplot .u-cursor-x, .uplot .u-cursor-y { border-color: #585b70 !important; }
.uplot .u-select { background: rgba(137,180,250,0.1) !important; border: 1px solid rgba(137,180,250,0.4) !important; }

/* ── Top bar ─────────────────────────────────────────────────── */
#topbar {
  position:fixed; top:0; left:0; right:0; height:var(--topbar-h);
  background:var(--mantle); border-bottom:1px solid var(--surface0);
  display:flex; align-items:center; gap:10px; padding:0 14px;
  z-index:100; box-shadow:0 2px 8px rgba(0,0,0,0.4); overflow:hidden;
}
#app-title { font-weight:700; font-size:15px; color:var(--accent);
  white-space:nowrap; letter-spacing:0.3px; flex-shrink:0; }
.topbar-sep { flex:1; min-width:4px; }
#status-led { width:8px; height:8px; border-radius:50%;
  background:var(--red); flex-shrink:0; transition:background var(--transition); }
#status-led.green  { background:var(--green);  animation:pulse-green  2s infinite; }
#status-led.orange { background:var(--yellow); animation:pulse-orange 1.5s infinite; }
@keyframes pulse-green  { 0%,100%{box-shadow:0 0 0 0 rgba(166,227,161,0.4)} 50%{box-shadow:0 0 0 4px rgba(166,227,161,0)} }
@keyframes pulse-orange { 0%,100%{box-shadow:0 0 0 0 rgba(249,226,175,0.4)} 50%{box-shadow:0 0 0 4px rgba(249,226,175,0)} }
#status-text { font-size:11px; color:var(--subtext0); white-space:nowrap; }
#sb-tsage    { font-size:11px; color:var(--overlay0);  white-space:nowrap; font-family:monospace; }

#cursor-readout {
  display:none; align-items:center; gap:8px;
  font-size:11px; font-family:monospace;
  background:var(--surface0); border:1px solid var(--surface1);
  border-radius:5px; padding:3px 8px; white-space:nowrap; flex-shrink:0;
}
#cursor-readout.visible { display:flex; }
#cur-ta { color:var(--sky); } #cur-tb { color:var(--yellow); }
#cur-dt { color:var(--subtext1); } .cur-sep { color:var(--surface2); }

.topbar-vsep { width:1px; height:22px; background:var(--surface0); flex-shrink:0; margin:0 2px; }
#layout-btns { display:flex; gap:2px; align-items:center; flex-shrink:0; }
.ctrl-label { font-size:12px; color:var(--subtext0); white-space:nowrap; flex-shrink:0; }
select.ctrl-select {
  background:var(--surface0); color:var(--text);
  border:1px solid var(--surface1); border-radius:var(--radius);
  padding:4px 6px; font-size:12px; cursor:pointer; outline:none; flex-shrink:0;
}
select.ctrl-select:hover { border-color:var(--accent); }
button.ctrl-btn {
  background:var(--surface0); color:var(--text);
  border:1px solid var(--surface1); border-radius:var(--radius);
  padding:4px 12px; font-size:12px; cursor:pointer; white-space:nowrap; flex-shrink:0;
  transition:background var(--transition),border-color var(--transition);
}
button.ctrl-btn:hover  { background:var(--surface1); border-color:var(--accent); }
button.ctrl-btn.active { background:var(--surface1); border-color:var(--accent); color:var(--accent); }
button.ctrl-btn.trig-active { background:rgba(203,166,247,0.15); border-color:var(--mauve); color:var(--mauve); }
button.ctrl-btn.cursor-a    { border-color:var(--sky);   color:var(--sky); }
button.ctrl-btn.cursor-b    { border-color:var(--yellow); color:var(--yellow); }
button.ctrl-btn.resume-btn  { border-color:var(--teal);  color:var(--teal); }

/* ── Trigger bar ──────────────────────────────────────────────── */
#trigbar {
  position:fixed; top:var(--topbar-h); left:0; right:0;
  background:var(--crust); border-bottom:1px solid var(--surface0);
  display:flex; align-items:center; flex-wrap:wrap; gap:10px;
  padding:0 16px; z-index:99;
  height:0; overflow:hidden;
  transition:height var(--transition),padding var(--transition);
}
#trigbar.open { height:48px; padding:0 16px; }
.trig-group { display:flex; align-items:center; gap:6px; }
.trig-sep  { width:1px; height:24px; background:var(--surface0); flex-shrink:0; }
.trig-label { font-size:11px; color:var(--subtext0); white-space:nowrap; }
select.trig-select {
  background:var(--surface0); color:var(--text);
  border:1px solid var(--surface1); border-radius:5px;
  padding:3px 6px; font-size:12px; cursor:pointer; outline:none;
}
select.trig-select:hover { border-color:var(--mauve); }
input.trig-input {
  background:var(--surface0); color:var(--text);
  border:1px solid var(--surface1); border-radius:5px;
  padding:3px 6px; font-size:12px; outline:none; width:80px;
}
input.trig-input:focus { border-color:var(--mauve); }
input[type=range].trig-range {
  -webkit-appearance:none; width:90px; height:4px;
  background:var(--surface1); border-radius:2px; outline:none; cursor:pointer;
}
input[type=range].trig-range::-webkit-slider-thumb {
  -webkit-appearance:none; width:12px; height:12px;
  border-radius:50%; background:var(--mauve); cursor:pointer;
}
.trig-range-val { font-size:11px; color:var(--mauve); min-width:28px; }
#trig-status-badge {
  font-size:11px; font-weight:700; letter-spacing:0.8px;
  padding:3px 10px; border-radius:12px;
  border:1px solid var(--surface1); background:var(--surface0); color:var(--subtext0);
  min-width:80px; text-align:center; white-space:nowrap;
}
#trig-status-badge.armed     { background:rgba(166,227,161,0.12); border-color:var(--green);  color:var(--green); }
#trig-status-badge.waiting   { background:rgba(249,226,175,0.12); border-color:var(--yellow); color:var(--yellow); }
#trig-status-badge.triggered { background:rgba(203,166,247,0.15); border-color:var(--mauve);  color:var(--mauve); }
#btn-trig-rearm, #btn-trig-stop {
  border:none; border-radius:5px;
  padding:4px 12px; font-size:12px; font-weight:600; cursor:pointer; display:none;
}
#btn-trig-rearm { background:var(--mauve); color:var(--crust); }
#btn-trig-stop  { background:var(--surface1); color:var(--yellow); border:1px solid var(--yellow); }
#btn-trig-rearm:hover, #btn-trig-stop:hover { opacity:0.85; }

/* ── Status bar ───────────────────────────────────────────────── */
#statusbar {
  position:fixed; bottom:0; left:0; right:0; height:var(--statusbar-h);
  background:var(--crust); border-top:1px solid var(--surface0);
  display:flex; align-items:center; justify-content:space-between;
  padding:0 10px; z-index:100;
}
#sb-left { display:flex; align-items:center; gap:6px; }
#build-version { font-size:10px; color:var(--overlay0); font-family:monospace; white-space:nowrap; }

/* ── Body ─────────────────────────────────────────────────────── */
#body {
  position:fixed; top:calc(var(--topbar-h) + var(--trigbar-h));
  left:0; right:0; bottom:var(--statusbar-h); display:flex; overflow:hidden;
  transition:top var(--transition);
}

/* ── Sidebar ──────────────────────────────────────────────────── */
#sidebar {
  width:var(--sidebar-w); min-width:var(--sidebar-w);
  background:var(--mantle); border-right:1px solid var(--surface0);
  display:flex; flex-direction:column;
  transition:width var(--transition),min-width var(--transition); overflow:hidden;
}
#sidebar.collapsed { width:0; min-width:0; }
#sidebar-header {
  display:flex; align-items:center; justify-content:space-between;
  padding:10px 14px; border-bottom:1px solid var(--surface0);
  font-weight:600; color:var(--subtext1); font-size:12px;
  text-transform:uppercase; letter-spacing:0.8px; flex-shrink:0;
}
#signal-list { flex:1; overflow-y:auto; padding:8px 0; }
.sig-item {
  padding:6px 14px; cursor:grab; border-radius:6px; margin:1px 6px;
  transition:background var(--transition); display:flex; align-items:center; gap:8px;
  user-select:none;
}
.sig-item:hover  { background:var(--surface0); }
.sig-item:active { cursor:grabbing; }
.sig-item.dragging { opacity:0.4; }
.sig-name  { flex:1; font-size:13px; color:var(--text); overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.sig-unit  { font-size:11px; color:var(--subtext0); font-style:italic; }
.type-badge { font-size:10px; background:var(--surface1); color:var(--subtext1); padding:1px 5px; border-radius:3px; white-space:nowrap; }
.array-group {}
.array-header {
  padding:6px 14px 6px 10px; cursor:pointer; border-radius:6px; margin:1px 6px;
  transition:background var(--transition); display:flex; align-items:center; gap:6px; user-select:none;
}
.array-header:hover { background:var(--surface0); }
.array-arrow { font-size:10px; color:var(--subtext0); transition:transform var(--transition); display:inline-block; }
.array-header.open .array-arrow { transform:rotate(90deg); }
.array-children { display:none; padding-left:16px; }
.array-header.open + .array-children { display:block; }
.array-child {
  padding:4px 14px 4px 8px; cursor:grab; border-radius:6px; margin:1px 6px;
  transition:background var(--transition); display:flex; align-items:center; gap:8px;
  user-select:none; color:var(--subtext1); font-size:12px;
}
.array-child:hover  { background:var(--surface0); }
.array-child:active { cursor:grabbing; }

/* ── Main area ────────────────────────────────────────────────── */
#main { flex:1; display:flex; flex-direction:column; overflow:hidden; min-width:0; }
/* Layout toggle button in topbar */
#btn-layout {
  display:flex; align-items:center; gap:4px;
  font-size:11px; padding:3px 8px;
}
#btn-layout svg { flex-shrink:0; }
#btn-layout span { flex-shrink:0; }

/* Layout dropdown menu */
#layout-menu {
  position:fixed; z-index:200;
  background:var(--mantle); border:1px solid var(--surface1); border-radius:var(--radius);
  box-shadow:0 6px 20px rgba(0,0,0,0.5);
  display:none; grid-template-columns:1fr 1fr; gap:4px; padding:6px;
}
#layout-menu.open { display:grid; }
.layout-menu-item {
  display:flex; flex-direction:column; align-items:center; gap:3px;
  padding:5px 10px; cursor:pointer;
  background:var(--surface0); border:1px solid var(--surface1); border-radius:6px;
  color:var(--subtext1); font-size:10px; font-family:monospace;
  transition:background var(--transition),border-color var(--transition),color var(--transition);
}
.layout-menu-item:hover  { background:var(--surface1); border-color:var(--accent); color:var(--accent); }
.layout-menu-item.active { background:var(--surface1); border-color:var(--accent); color:var(--accent); }

/* ── Plot grid ────────────────────────────────────────────────── */
#plot-grid {
  flex:1; min-height:0; display:grid; gap:0; padding:0; overflow:hidden;
  border-top:1px solid var(--surface0); border-left:1px solid var(--surface0);
}
#plot-grid.l1x1 { grid-template-columns:1fr;         grid-template-rows:1fr; }
#plot-grid.l2x1 { grid-template-columns:1fr 1fr;     grid-template-rows:1fr; }
#plot-grid.l1x2 { grid-template-columns:1fr;         grid-template-rows:1fr 1fr; }
#plot-grid.l2x2 { grid-template-columns:1fr 1fr;     grid-template-rows:1fr 1fr; }
#plot-grid.l3x1 { grid-template-columns:1fr 1fr 1fr; grid-template-rows:1fr; }
#plot-grid.l1x3 { grid-template-columns:1fr;         grid-template-rows:1fr 1fr 1fr; }
#plot-grid.l3x2 { grid-template-columns:1fr 1fr 1fr; grid-template-rows:1fr 1fr; }
#plot-grid.l2x3 { grid-template-columns:1fr 1fr;     grid-template-rows:1fr 1fr 1fr; }
#plot-grid.l1x4 { grid-template-columns:1fr;         grid-template-rows:1fr 1fr 1fr 1fr; }
#plot-grid.l4x1 { grid-template-columns:1fr 1fr 1fr 1fr; grid-template-rows:1fr; }

/* ── Plot card ────────────────────────────────────────────────── */
.plot-card {
  background:var(--bg);
  border-right:1px solid var(--surface0); border-bottom:1px solid var(--surface0);
  border-radius:0; display:flex; flex-direction:column;
  min-height:0; position:relative; overflow:hidden;
}
.plot-card.drag-over { background:rgba(137,180,250,0.04); box-shadow:inset 0 0 0 2px var(--accent); }
/* Header: always visible, part of normal card flex flow */
.plot-card-header {
  z-index:5; flex-shrink:0;
  background:rgba(17,17,27,0.88); backdrop-filter:blur(6px);
  border-bottom:1px solid var(--surface1);
  display:flex; align-items:center; gap:5px;
  padding:3px 8px; min-height:26px; overflow:hidden;
}
.plot-title {
  font-size:11px; color:var(--subtext1); font-weight:600;
  cursor:text; outline:none; border:1px solid transparent; border-radius:3px;
  padding:1px 3px; background:transparent; white-space:nowrap;
  flex-shrink:0; max-width:80px; overflow:hidden; text-overflow:ellipsis;
}
.plot-title:focus { border-color:var(--accent); background:var(--surface1); color:var(--text); }
.sig-badges { display:flex; flex-wrap:nowrap; gap:3px; flex:1; overflow:hidden; min-width:0; }
.sig-badge {
  display:inline-flex; align-items:center; gap:3px;
  background:rgba(69,71,90,0.6); color:var(--subtext1);
  border-radius:10px; padding:1px 6px 1px 4px;
  font-size:10px; white-space:nowrap; flex-shrink:0;
}
.trace-dot { width:7px; height:7px; border-radius:50%; flex-shrink:0; display:inline-block; }
.sig-badge-x {
  cursor:pointer; color:var(--overlay0); font-size:11px; line-height:1; margin-left:1px;
  transition:color var(--transition);
}
.sig-badge-x:hover { color:var(--red); }
.plot-body { flex:1; position:relative; min-height:0; overflow:hidden; }
.drop-hint {
  position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  color:var(--overlay0); font-size:13px; pointer-events:none;
}
.trig-collect-overlay {
  position:absolute; inset:0; display:none;
  align-items:center; justify-content:center; pointer-events:none; z-index:10;
}
.plot-card.trig-collecting .trig-collect-overlay { display:flex; }
.trig-collect-text {
  background:rgba(49,50,68,0.82); color:var(--mauve);
  font-size:11px; font-weight:600; padding:4px 12px; border-radius:20px;
  border:1px solid var(--mauve);
}

/* ── Signal style context menu ────────────────────────────────── */
#sig-ctx-menu {
  position:fixed; z-index:300;
  background:var(--mantle); border:1px solid var(--surface1); border-radius:var(--radius);
  box-shadow:0 8px 24px rgba(0,0,0,0.6); padding:10px; min-width:210px;
}
.ctx-menu-header {
  font-size:11px; color:var(--subtext0); margin-bottom:8px;
  padding-bottom:6px; border-bottom:1px solid var(--surface0);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.ctx-menu-key { color:var(--accent); font-weight:600; }
.ctx-row { display:flex; align-items:center; gap:8px; margin-bottom:6px; }
.ctx-row label { font-size:11px; color:var(--subtext0); width:42px; flex-shrink:0; }
.ctx-btns { display:flex; gap:3px; flex-wrap:wrap; }
.ctx-btn {
  background:var(--surface0); border:1px solid var(--surface1); border-radius:4px;
  color:var(--subtext1); font-size:11px; padding:2px 7px; cursor:pointer;
  transition:background var(--transition),border-color var(--transition),color var(--transition);
}
.ctx-btn:hover  { background:var(--surface1); border-color:var(--accent); }
.ctx-btn.active { background:var(--surface1); border-color:var(--accent); color:var(--accent); }
#ctx-color {
  width:28px; height:22px; border:1px solid var(--surface1); border-radius:4px;
  background:transparent; cursor:pointer; padding:1px;
}
.ctx-range { width:80px; }
.ctx-range-val { font-size:11px; color:var(--mauve); min-width:26px; }

/* ── Empty state ──────────────────────────────────────────────── */
#empty-state {
  position:absolute; top:50%; left:50%; transform:translate(-50%,-50%);
  text-align:center; color:var(--subtext0); pointer-events:none; display:none;
}
#empty-state.visible { display:block; }
#empty-state h2 { font-size:20px; margin-bottom:8px; color:var(--surface2); }
#empty-state p   { font-size:13px; }

@media (max-width:700px) { #sidebar { width:0; min-width:0; } :root { --sidebar-w:240px; } }