/* Electronics Lab – styles */
:root {
  --bg: #eef0f3;
  --panel: #ffffff;
  --panel-2: #f6f7f9;
  --border: #e3e6eb;
  --border-strong: #cfd5dd;
  --text: #1b2430;
  --muted: #677385;
  --faint: #98a2b3;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.1);
  --danger: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.08);
  --ok: #16a34a;
  --warn: #b45309;
  --warn-soft: #fff7e6;
  --hover: rgba(15, 23, 42, 0.05);
  --kbd: #f1f3f6;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow: 0 2px 6px rgba(16, 24, 40, 0.06), 0 12px 32px rgba(16, 24, 40, 0.12);
  --radius: 8px;
  --font: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  color-scheme: light;
}
[data-theme='dark'] {
  --bg: #0a0e13;
  --panel: #121820;
  --panel-2: #171e28;
  --border: #232c38;
  --border-strong: #2f3a48;
  --text: #e6ebf2;
  --muted: #94a0b2;
  --faint: #667085;
  --accent: #60a5fa;
  --accent-hover: #93c5fd;
  --accent-soft: rgba(96, 165, 250, 0.14);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.1);
  --ok: #4ade80;
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, 0.1);
  --hover: rgba(255, 255, 255, 0.06);
  --kbd: #1e2632;
  --shadow: 0 2px 6px rgba(0, 0, 0, 0.3), 0 12px 32px rgba(0, 0, 0, 0.45);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font: 13px/1.45 var(--font);
  color: var(--text);
  background: var(--bg);
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
}
body.resizing { cursor: ns-resize; user-select: none; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
.mono { font-family: var(--mono); }
.muted { color: var(--muted); }
.small { font-size: 12px; }
[hidden] { display: none !important; }
kbd {
  font: 11px/1 var(--mono);
  padding: 2px 5px;
  border-radius: 4px;
  background: var(--kbd);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  color: var(--text);
}
.ico { width: 16px; height: 16px; flex: none; display: block; }

#app { display: grid; grid-template-rows: 50px 1fr 26px; height: 100vh; }

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.brand { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 14px; letter-spacing: -0.01em; padding-right: 8px; white-space: nowrap; }
.logo svg { width: 26px; height: 26px; display: block; }
.tb-group { display: flex; align-items: center; gap: 2px; padding: 0 6px; border-left: 1px solid var(--border); flex: none; }
.tb-spacer { flex: 1; }
.tb-btn {
  height: 32px;
  min-width: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 0 8px;
  border: 0;
  border-radius: 7px;
  background: transparent;
  color: var(--text);
  white-space: nowrap;
}
.tb-btn:hover:not(:disabled) { background: var(--hover); }
.tb-btn:disabled { opacity: 0.35; cursor: default; }
.tb-btn.on { background: var(--accent-soft); color: var(--accent); }
.tb-btn.text { padding: 0 10px; font-weight: 500; }
.tb-btn.accent { color: var(--accent); }
.seg-tools { gap: 2px; }
.run-btn {
  height: 32px;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 0 14px 0 11px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  min-width: 86px;
  box-shadow: var(--shadow-sm);
}
.run-btn:hover { background: var(--accent-hover); }
.run-btn.running { background: var(--ok); }
[data-theme='dark'] .run-btn { color: #04121f; }
.speed { display: flex; align-items: center; gap: 8px; padding-left: 8px; }
.speed input { width: 110px; accent-color: var(--accent); }
#speedLabel { font-size: 12px; color: var(--muted); min-width: 64px; }

/* ---------- workspace ---------- */
.workspace { display: grid; grid-template-columns: 240px minmax(0, 1fr) 290px; min-height: 0; }

/* palette */
.palette { background: var(--panel); border-right: 1px solid var(--border); display: flex; flex-direction: column; min-height: 0; }
.pal-search { display: flex; align-items: center; gap: 8px; margin: 10px; padding: 0 10px; height: 34px; border: 1px solid var(--border); border-radius: 8px; background: var(--panel-2); color: var(--muted); }
.pal-search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.pal-search input { border: 0; outline: 0; background: transparent; flex: 1; min-width: 0; }
.pal-list { overflow-y: auto; padding: 0 8px 16px; flex: 1; }
.pal-cat { margin-bottom: 2px; }
.pal-head {
  display: flex; align-items: center; gap: 6px; width: 100%;
  border: 0; background: transparent; padding: 7px 4px; border-radius: 6px;
  font-size: 11px; font-weight: 650; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted);
}
.pal-head:hover { color: var(--text); }
.pal-head .chev { width: 13px; height: 13px; transition: transform 0.15s; }
.pal-cat.closed .chev { transform: rotate(-90deg); }
.pal-title { flex: 1; text-align: left; }
.pal-count { font-weight: 500; color: var(--faint); }
.pal-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; padding: 0 0 8px; }
.pal-grid.list { grid-template-columns: 1fr; gap: 2px; }
.pal-item {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 6px 2px 5px; border-radius: 8px; border: 1px solid transparent;
  cursor: grab; user-select: none; touch-action: none; min-width: 0;
}
.pal-item:hover { background: var(--hover); border-color: var(--border); }
.pal-item.active { background: var(--accent-soft); border-color: var(--accent); }
.pal-item:focus-visible { outline: 2px solid var(--accent); }
.pal-icon { width: 58px; height: 36px; display: block; pointer-events: none; }
.pal-name { font-size: 11px; line-height: 1.2; text-align: center; color: var(--text); overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; max-width: 100%; }
.pal-item.ic { flex-direction: row; gap: 10px; padding: 5px 6px; }
.pal-item.ic .pal-icon { width: 46px; height: 34px; }
.pal-item.ic .pal-name { text-align: left; font-weight: 600; font-size: 12px; -webkit-line-clamp: 1; }
.pal-text { min-width: 0; }
.pal-sub { font-size: 11px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pal-new {
  display: flex; align-items: center; justify-content: center; gap: 6px; margin-top: 4px;
  height: 34px; border: 1px dashed var(--border-strong); border-radius: 8px; background: transparent; color: var(--accent); font-weight: 500;
}
.pal-new:hover { background: var(--accent-soft); border-color: var(--accent); }
.pal-new .ico { width: 14px; height: 14px; }
.pal-hint { font-size: 11px; color: var(--faint); padding: 4px 2px 0; }

/* canvas */
.center { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.canvas-wrap { position: relative; flex: 1; min-height: 140px; overflow: hidden; }
#schematic { position: absolute; inset: 0; width: 100%; height: 100%; display: block; outline: none; touch-action: none; }
.hud {
  position: absolute; right: 12px; bottom: 12px; display: flex; align-items: center; gap: 2px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 9px; padding: 3px; box-shadow: var(--shadow-sm);
}
.hud-btn { width: 28px; height: 28px; border: 0; border-radius: 6px; background: transparent; display: grid; place-items: center; color: var(--text); }
.hud-btn:hover { background: var(--hover); }
.hud-btn .ico { width: 15px; height: 15px; }
.hud-zoom { font: 11px var(--mono); color: var(--muted); min-width: 42px; text-align: center; }
.tooltip {
  position: absolute; pointer-events: none; z-index: 5;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow);
  padding: 7px 10px; min-width: 150px; font-size: 12px;
}
.tt-title { font-weight: 650; margin-bottom: 3px; }
.tt-row { display: flex; justify-content: space-between; gap: 16px; }
.tt-row span { color: var(--muted); }
.tt-row b { font: 600 12px var(--mono); }
.tt-sub { color: var(--muted); font-size: 11px; margin-top: 3px; }
.tt-warn { color: var(--danger); font-size: 11px; margin-top: 4px; font-weight: 600; }
.sim-error {
  position: absolute; left: 50%; top: 14px; transform: translateX(-50%);
  display: flex; align-items: center; gap: 12px; max-width: min(640px, calc(100% - 32px));
  padding: 10px 12px; border-radius: 10px; background: var(--panel); border: 1px solid var(--danger); box-shadow: var(--shadow);
}
.sim-error .msg { color: var(--muted); font-size: 12px; }
.sim-error-ico { width: 26px; height: 26px; flex: none; border-radius: 50%; background: var(--danger); color: #fff; display: grid; place-items: center; font-weight: 800; }

/* splitter & scope */
.splitter { height: 6px; cursor: ns-resize; background: var(--border); position: relative; flex: none; }
.splitter::after { content: ''; position: absolute; left: 50%; top: 2px; width: 36px; height: 2px; margin-left: -18px; border-radius: 2px; background: var(--border-strong); }
.splitter:hover { background: var(--accent-soft); }
.scope { height: 270px; flex: none; display: flex; flex-direction: column; background: var(--panel); min-height: 0; }
.scope.collapsed { height: 40px !important; }
.scope.collapsed .scope-body, .scope.collapsed .table-body { display: none !important; }
.scope.collapsed .scope-ctrls { display: none !important; }
.scope:not(.digital) .dig-only { display: none; }
.inp.th-inp { width: 58px; flex: none; }
.switch.sm { width: 28px; height: 16px; }
.switch.sm::after { width: 12px; height: 12px; }
.switch.sm:checked::after { transform: translateX(12px); }

/* panel tabs */
.ptabs { display: flex; gap: 2px; align-self: stretch; }
.ptab {
  display: flex; align-items: center; gap: 7px; padding: 0 12px; border: 0; background: transparent;
  font-weight: 600; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; white-space: nowrap;
}
.ptab:hover { color: var(--text); }
.ptab.on { color: var(--text); border-bottom-color: var(--accent); }
.ptab.on .ico { color: var(--accent); }
.ptab-count { font: 600 10.5px var(--mono); padding: 1px 6px; border-radius: 10px; background: var(--panel-2); border: 1px solid var(--border); color: var(--muted); }

/* data table */
.table-body { flex: 1; display: grid; grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.4fr); min-height: 0; }
.dt-grid { overflow: auto; border-right: 1px solid var(--border); min-height: 0; scrollbar-width: thin; }
table.dt { border-collapse: separate; border-spacing: 0; width: 100%; font: 12px var(--mono); }
table.dt th { position: sticky; top: 0; z-index: 1; background: var(--panel-2); border-bottom: 1px solid var(--border); text-align: right; padding: 0; font-family: var(--font); }
table.dt th.dead span { color: var(--danger); text-decoration: line-through; }
.dt-th { display: flex; align-items: baseline; justify-content: flex-end; gap: 4px; padding: 6px 8px; white-space: nowrap; }
.dt-th span { font-weight: 650; max-width: 140px; overflow: hidden; text-overflow: ellipsis; }
.dt-th small { color: var(--muted); font-weight: 500; }
.dt-del, .dt-rdel { border: 0; background: transparent; color: var(--faint); padding: 0 2px; font-size: 14px; line-height: 1; visibility: hidden; }
.dt-del:hover, .dt-rdel:hover { color: var(--danger); }
.dt-th:hover .dt-del, tr:hover .dt-rdel { visibility: visible; }
table.dt td { text-align: right; padding: 4px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
table.dt tbody tr:hover td { background: var(--accent-soft); }
table.dt .dt-n { text-align: left; color: var(--faint); width: 1%; padding-left: 10px; }
table.dt th.dt-n { padding: 6px 10px; color: var(--muted); }
td.dt-n { position: relative; }
td.dt-n .dt-rdel { position: absolute; right: 0; top: 3px; }
.dt-empty { padding: 14px; color: var(--muted); font-size: 12px; line-height: 1.6; }
.dt-plot { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.dt-plot-ctrls { display: flex; align-items: center; flex-wrap: wrap; gap: 6px 8px; padding: 6px 10px; border-bottom: 1px solid var(--border); }
.dt-plot-ctrls select { width: auto; max-width: 180px; }
.dt-ys { display: flex; flex-wrap: wrap; gap: 4px; flex: 1; }
.dt-ychip { display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 9px; border-radius: 12px; border: 1px solid var(--border); background: var(--panel); font-size: 12px; color: var(--muted); }
.dt-ychip i { width: 8px; height: 8px; border-radius: 50%; border: 2px solid var(--faint); }
.dt-ychip.on { color: var(--text); border-color: var(--c); background: var(--panel-2); }
.dt-ychip.on i { background: var(--c); border-color: var(--c); }
.dt-plot-wrap { position: relative; flex: 1; min-height: 0; }
#dtPlot { position: absolute; inset: 0; width: 100%; height: 100%; display: block; cursor: crosshair; }
.scope-ctrls .btn .ico { width: 13px; height: 13px; }
.sweep .field { margin-bottom: 8px; }
.sweep .field.check { margin-bottom: 6px; }
.sweep-prog { display: flex; align-items: center; gap: 10px; margin-top: 10px; font: 12px var(--mono); color: var(--muted); }
.sweep-prog .bar { flex: 1; height: 6px; border-radius: 3px; background: var(--panel-2); border: 1px solid var(--border); overflow: hidden; }
.sweep-prog .bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width 0.1s; }
.scope.collapsed #scopeToggle .ico { transform: rotate(180deg); }
.scope-head { display: flex; align-items: center; justify-content: space-between; height: 40px; padding: 0 10px 0 6px; border-bottom: 1px solid var(--border); flex: none; gap: 10px; }
.scope-title { display: flex; align-items: center; gap: 8px; font-weight: 650; white-space: nowrap; }
.scope-title .ico { color: var(--accent); }
.scope-ctrls { display: flex; align-items: center; gap: 6px; margin-left: auto; overflow-x: auto; scrollbar-width: none; }
.mini-field { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); white-space: nowrap; }
.mini-field sub { font-size: 9px; }
select.inp.tdiv { width: auto; flex: none; }
.scope-body { flex: 1; display: grid; grid-template-columns: 250px minmax(0, 1fr); min-height: 0; }
.scope-channels { overflow-y: auto; padding: 8px; border-right: 1px solid var(--border); display: flex; flex-direction: column; gap: 6px; }
.scope-empty { color: var(--muted); font-size: 12px; padding: 8px 6px; line-height: 1.55; }
.scope-screen { position: relative; min-width: 0; background: #0b1016; }
#scopeCanvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; cursor: crosshair; }
.ch {
  padding: 6px 8px 7px; border-radius: 8px;
  background: var(--panel-2); border: 1px solid var(--border); border-left: 3px solid var(--c);
}
.ch.off { opacity: 0.5; }
.ch-top { display: flex; align-items: center; gap: 7px; }
.ch-dot { width: 20px; height: 20px; border-radius: 50%; border: 0; background: var(--c); color: #0b1016; font: 700 10px var(--mono); flex: none; padding: 0; }
.ch.off .ch-dot { background: transparent; box-shadow: inset 0 0 0 2px var(--c); color: var(--c); }
.ch-name { flex: 1; min-width: 0; font-weight: 600; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ch-scale { width: 86px; height: 22px; font-size: 11px; padding: 0 2px; border: 1px solid var(--border); border-radius: 5px; background: var(--panel); }
.ch-val { font: 600 13px var(--mono); margin: 3px 0 0 27px; }
.ch-stats { font-size: 10.5px; color: var(--muted); font-family: var(--mono); margin-left: 27px; line-height: 1.4; }

/* inspector */
.inspector { background: var(--panel); border-left: 1px solid var(--border); overflow-y: auto; min-height: 0; }
.insp-head { padding: 16px 16px 12px; border-bottom: 1px solid var(--border); }
.insp-head.row { display: flex; align-items: center; gap: 12px; }
.insp-icon { width: 62px; height: 46px; flex: none; border-radius: 8px; background: var(--panel-2); border: 1px solid var(--border); }
.insp-title { font-size: 15px; font-weight: 700; letter-spacing: -0.01em; }
.insp-sub { color: var(--muted); font-size: 12px; }
.insp-desc { padding: 10px 16px 0; color: var(--muted); font-size: 12px; }
.insp-sec { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.sec-title { font-size: 11px; font-weight: 650; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 8px; }
.insp-actions { display: flex; flex-wrap: wrap; gap: 6px; padding: 12px 16px; }
.field { display: grid; grid-template-columns: 1fr; gap: 4px; margin-bottom: 10px; }
.field-label { font-size: 12px; color: var(--muted); }
.field-ctl { display: flex; align-items: center; gap: 6px; }
.field-ctl .unit { color: var(--muted); font-size: 12px; min-width: 18px; }
.field.check { grid-template-columns: 1fr auto; align-items: center; }
.field.check.inline { display: flex; gap: 8px; margin: 0; }
.inp {
  width: 100%; height: 32px; padding: 0 9px; border: 1px solid var(--border); border-radius: 7px;
  background: var(--panel-2); outline: none; min-width: 0;
}
.inp:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); background: var(--panel); }
.inp.num, .inp.mono { font-family: var(--mono); }
.inp.bad { border-color: var(--danger); box-shadow: 0 0 0 3px var(--danger-soft); }
.inp.sm { height: 28px; font-size: 12px; padding: 0 6px; }
select.inp { padding-right: 4px; }
.range { width: 100%; accent-color: var(--accent); }
.switch { appearance: none; width: 34px; height: 20px; border-radius: 20px; background: var(--border-strong); position: relative; cursor: pointer; transition: background 0.15s; flex: none; margin: 0; }
.switch::after { content: ''; position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25); transition: transform 0.15s; }
.switch:checked { background: var(--accent); }
.switch:checked::after { transform: translateX(14px); }
.readings { display: grid; gap: 4px; }
.reading { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; padding: 6px 10px; border-radius: 7px; background: var(--panel-2); }
.reading span { color: var(--muted); font-size: 12px; }
.reading b { font: 600 13px var(--mono); }
.reading.v b { color: var(--accent); }
.reading.i b { color: #d97706; }
[data-theme='dark'] .reading.i b { color: #fbbf24; }
.reading.p b { color: #9333ea; }
[data-theme='dark'] .reading.p b { color: #c084fc; }
.warn { margin-top: 6px; padding: 7px 10px; border-radius: 7px; background: var(--warn-soft); color: var(--warn); font-size: 12px; }
.tips ol { margin: 0; padding-left: 18px; color: var(--text); }
.tips li { margin-bottom: 7px; }
.tips p { margin: 6px 0 0; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: 32px; padding: 0 12px; border: 1px solid var(--border); border-radius: 7px;
  background: var(--panel); font-weight: 500; white-space: nowrap;
}
.btn:hover { background: var(--hover); border-color: var(--border-strong); }
.btn.sm { height: 28px; padding: 0 9px; font-size: 12px; }
.btn.sm .ico { width: 14px; height: 14px; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
[data-theme='dark'] .btn.primary { color: #04121f; }
.btn.primary:hover { background: var(--accent-hover); }
.btn.danger { color: var(--danger); }
.btn.primary.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.ghost:hover { background: var(--hover); }
.btn.wide { width: 100%; }
.icon-btn { width: 30px; height: 30px; display: grid; place-items: center; border: 0; border-radius: 7px; background: transparent; color: var(--muted); padding: 0; }
.icon-btn:hover { background: var(--hover); color: var(--text); }
.icon-btn.sm { width: 24px; height: 24px; }
.icon-btn.sm .ico { width: 14px; height: 14px; }
.seg { display: inline-flex; padding: 2px; border-radius: 8px; background: var(--panel-2); border: 1px solid var(--border); gap: 2px; }
.seg button { border: 0; background: transparent; border-radius: 6px; padding: 0 10px; height: 28px; color: var(--muted); font-weight: 500; white-space: nowrap; }
.seg button.on { background: var(--panel); color: var(--text); box-shadow: var(--shadow-sm); }
[data-theme='dark'] .seg button.on { background: var(--border-strong); }
.seg.sm button { height: 22px; font-size: 12px; padding: 0 8px; }

/* status bar */
.statusbar { display: flex; align-items: center; gap: 16px; padding: 0 12px; background: var(--panel); border-top: 1px solid var(--border); font-size: 12px; white-space: nowrap; overflow: hidden; }
.st-sim { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; }
.st-sim::before { content: ''; width: 8px; height: 8px; border-radius: 50%; background: var(--faint); }
.st-sim.running::before { background: var(--ok); box-shadow: 0 0 0 3px rgba(22, 163, 74, 0.18); }
.st-sim.error { color: var(--danger); }
.st-sim.error::before { background: var(--danger); }
.st-hint { color: var(--muted); overflow: hidden; text-overflow: ellipsis; }
.st-hint.warn { color: var(--warn); }

/* context menu */
.ctx-menu {
  position: fixed; z-index: 50; min-width: 220px; padding: 5px; border-radius: 10px;
  background: var(--panel); border: 1px solid var(--border); box-shadow: var(--shadow);
}
.menu-item { display: flex; align-items: center; gap: 8px; width: 100%; height: 30px; padding: 0 8px; border: 0; border-radius: 6px; background: transparent; text-align: left; }
.menu-item:hover:not(:disabled) { background: var(--accent-soft); }
.menu-item:disabled { opacity: 0.4; cursor: default; }
.menu-item.danger { color: var(--danger); }
.menu-item.danger:hover { background: var(--danger-soft); }
.menu-ico { width: 16px; display: grid; place-items: center; color: var(--accent); }
.menu-ico .ico { width: 14px; height: 14px; }
.menu-label { flex: 1; }
.menu-item kbd { font-size: 10px; }
.menu-head { padding: 6px 8px 4px; font-size: 11px; font-weight: 650; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.menu-sep { height: 1px; background: var(--border); margin: 4px 2px; }

/* modal */
.modal-overlay { position: fixed; inset: 0; z-index: 40; background: rgba(10, 15, 25, 0.42); display: grid; place-items: center; padding: 20px; animation: fade 0.12s ease-out; }
.modal { width: min(460px, 100%); max-height: calc(100vh - 40px); display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; box-shadow: var(--shadow); animation: pop 0.14s ease-out; }
.modal.wide { width: min(880px, 100%); }
.modal-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 14px 10px 20px; }
.modal-title { font-size: 16px; font-weight: 700; letter-spacing: -0.01em; }
.modal-body { padding: 4px 20px 16px; overflow-y: auto; }
.modal-body p { margin: 0 0 8px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 8px; padding: 12px 20px 16px; border-top: 1px solid var(--border); }
.modal-foot .left { margin-right: auto; }
@keyframes fade { from { opacity: 0; } }
@keyframes pop { from { opacity: 0; transform: translateY(6px) scale(0.98); } }

textarea.code {
  width: 100%; height: 340px; resize: vertical; padding: 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--panel-2); font: 12px/1.5 var(--mono); outline: none; white-space: pre; tab-size: 2;
}
textarea.code.small { height: 150px; }
textarea.code:focus { border-color: var(--accent); }
.tikz-opts { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-bottom: 12px; }

/* examples */
.ex-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }
.ex-card { display: flex; flex-direction: column; text-align: left; padding: 10px; border-radius: 10px; border: 1px solid var(--border); background: var(--panel); gap: 4px; }
.ex-card:hover { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.ex-thumb { width: 100%; height: 130px; border-radius: 7px; background: var(--panel-2); margin-bottom: 6px; display: block; }
.ex-title { font-weight: 650; }
.ex-desc { color: var(--muted); font-size: 12px; }

/* help */
.help-cols { display: grid; grid-template-columns: 1fr 1.3fr; gap: 28px; }
.help h4 { margin: 14px 0 6px; font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.help h4:first-child { margin-top: 0; }
.help table { border-collapse: collapse; width: 100%; }
.help td { padding: 4px 0; vertical-align: top; }
.help td:first-child { white-space: nowrap; padding-right: 14px; width: 1%; }
.help p { color: var(--text); margin: 0 0 6px; }

/* IC designer */
.ic-dialog .tabs { margin-bottom: 14px; }
.ic-main { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 20px; }
.ic-row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.ic-code-head { display: flex; align-items: center; justify-content: space-between; margin: 12px 0 6px; }
.ic-code-head .sec-title { margin: 0; }
.ic-code-head select { width: auto; height: 28px; font-size: 12px; }
.syntax { font-size: 11.5px; color: var(--muted); margin-top: 6px; line-height: 1.7; }
.syntax code { font-family: var(--mono); background: var(--kbd); padding: 1px 4px; border-radius: 4px; color: var(--text); }
.ic-err { margin-top: 8px; min-height: 20px; font-size: 12px; }
.ic-err.on { color: var(--danger); }
.ic-err.ok { color: var(--ok); }
.ic-right { display: flex; flex-direction: column; }
.ic-preview { width: 100%; flex: 1; min-height: 240px; border-radius: 10px; background: var(--panel-2); border: 1px solid var(--border); }
.port-table { display: grid; gap: 4px; margin-bottom: 8px; }
.port-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 4px 4px 4px 10px; border-radius: 7px; background: var(--panel-2); }
.port-row select { width: 110px; }
.empty-note { padding: 12px; border-radius: 8px; border: 1px dashed var(--border-strong); color: var(--muted); font-size: 12px; }

/* toasts */
.toasts { position: fixed; bottom: 40px; left: 50%; transform: translateX(-50%); display: flex; flex-direction: column; align-items: center; gap: 6px; z-index: 60; pointer-events: none; }
.toast { padding: 8px 14px; border-radius: 9px; background: #1b2430; color: #fff; font-size: 12.5px; box-shadow: var(--shadow); animation: pop 0.15s ease-out; transition: opacity 0.3s; }
[data-theme='dark'] .toast { background: #e6ebf2; color: #0a0e13; }
.toast.err { background: var(--danger); color: #fff; }
.toast.out { opacity: 0; }

/* scrollbars */
.pal-list, .inspector, .scope-channels, .modal-body { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }

/* responsive */
@media (max-width: 1180px) {
  .workspace { grid-template-columns: 210px minmax(0, 1fr) 250px; }
  .brand span, #btnExamples span, #btnIC span { display: none; }
  .speed input { width: 80px; }
}
@media (max-width: 860px) {
  .workspace { grid-template-columns: 180px minmax(0, 1fr); }
  .inspector { display: none; }
  .scope-body { grid-template-columns: 170px minmax(0, 1fr); }
  .ic-main, .help-cols { grid-template-columns: 1fr; }
}