:root {
  --bg: #f4f6f8; --panel: #ffffff; --fg: #1d2733; --muted: #66758a; --border: #d6dde5;
  --accent: #2563eb; --accent-fg: #ffffff; --danger: #c43d3d;
  --canvas-bg: #fbfcfd; --grid: #cfd6de; --comp-fill: #eef2f6; --comp-stroke: #3b4a5c;
  --wire0: #55657a; --wire1: #14a85a; --wirex: #d64545; --wirez: #c58a1a; --bus: #7c4ddb;
  --led-off: #3a3f47; --seg-on: #ff4d4d; --seg-off: #2a2e34;
  --radius: 6px; color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #12161b; --panel: #1a2027; --fg: #e3e9f0; --muted: #8b9bb0; --border: #2e3844;
  --accent: #5b9bff; --accent-fg: #07101f; --danger: #ff6b6b;
  --canvas-bg: #0f1318; --grid: #29323d; --comp-fill: #212a34; --comp-stroke: #9db0c6;
  --wire0: #6d7f96; --wire1: #3ddc84; --wirex: #ff6b6b; --wirez: #e0a93a; --bus: #b393ff;
  --led-off: #2b3038; --seg-on: #ff5d5d; --seg-off: #232830; color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #12161b; --panel: #1a2027; --fg: #e3e9f0; --muted: #8b9bb0; --border: #2e3844;
    --accent: #5b9bff; --accent-fg: #07101f; --danger: #ff6b6b;
    --canvas-bg: #0f1318; --grid: #29323d; --comp-fill: #212a34; --comp-stroke: #9db0c6;
    --wire0: #6d7f96; --wire1: #3ddc84; --wirex: #ff6b6b; --wirez: #e0a93a; --bus: #b393ff;
    --led-off: #2b3038; --seg-on: #ff5d5d; --seg-off: #232830; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  display: flex; flex-direction: column; background: var(--bg); color: var(--fg);
  font: 13px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; overflow: hidden;
}
.mono { font-family: ui-monospace, Menlo, Consolas, monospace; }
button, select, input, textarea {
  font: inherit; color: var(--fg); background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 4px 9px;
}
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
button:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); font-weight: 600; }
button.danger { color: var(--danger); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
#toolbar {
  display: flex; flex-wrap: wrap; gap: 8px 14px; align-items: center; padding: 6px 10px;
  background: var(--panel); border-bottom: 1px solid var(--border);
}
.brand { font-size: 16px; letter-spacing: 0.02em; }
.brand b { color: var(--accent); }
#project-name { width: 150px; font-weight: 600; }
.group { display: flex; gap: 5px; align-items: center; flex-wrap: wrap; }
.speed { display: flex; align-items: center; gap: 4px; color: var(--muted); }
.speed input { width: 80px; padding: 0; }
#clock { min-width: 64px; text-align: right; color: var(--muted); }
#editing-bar {
  display: flex; align-items: center; gap: 10px; padding: 4px 12px; background: var(--accent); color: var(--accent-fg);
}
#editing-bar[hidden] { display: none; }
#editing-bar button { background: var(--accent-fg); color: var(--accent); }
#main { flex: 1 1 auto; min-height: 0; display: flex; }
#palette { width: 176px; flex: none; overflow-y: auto; background: var(--panel); border-right: 1px solid var(--border); padding: 8px; }
#palette-search { width: 100%; margin-bottom: 6px; }
.pal-group h4 { margin: 10px 0 4px; font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.pal-group button { display: block; width: 100%; text-align: left; margin-bottom: 3px; padding: 3px 8px; }
.pal-group button.armed { background: var(--accent); color: var(--accent-fg); border-color: var(--accent); }
#stage { position: relative; flex: 1 1 auto; min-width: 0; }
#cv { width: 100%; height: 100%; display: block; touch-action: none; outline: none; }
#banner {
  position: absolute; left: 10px; right: 10px; top: 10px; padding: 8px 12px; border-radius: var(--radius);
  background: color-mix(in srgb, var(--danger) 16%, var(--panel)); border: 1px solid var(--danger);
  display: flex; gap: 10px; align-items: center; justify-content: space-between;
}
#banner[hidden] { display: none; }
#hint { position: absolute; left: 10px; bottom: 6px; color: var(--muted); font-size: 11px; pointer-events: none; }
#props { width: 232px; flex: none; overflow-y: auto; background: var(--panel); border-left: 1px solid var(--border); padding: 10px; }
#props h3 { margin: 0 0 8px; font-size: 14px; }
#props label { display: block; margin: 8px 0 2px; color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; }
#props input:not([type="checkbox"]), #props select, #props textarea { width: 100%; }
#props textarea { min-height: 90px; font-family: ui-monospace, Menlo, Consolas, monospace; }
#props .row { display: flex; gap: 6px; margin-top: 12px; flex-wrap: wrap; }
#props p { color: var(--muted); margin: 6px 0; }
#bottom { flex: none; height: 270px; display: flex; flex-direction: column; background: var(--panel); border-top: 1px solid var(--border); }
#tabs { display: flex; gap: 2px; padding: 4px 8px 0; border-bottom: 1px solid var(--border); }
#tabs button { border: none; border-bottom: 2px solid transparent; border-radius: 0; background: none; padding: 5px 12px; color: var(--muted); }
#tabs button.active { color: var(--fg); border-bottom-color: var(--accent); font-weight: 600; }
#panels { flex: 1; overflow: auto; padding: 10px 14px; }
.panel[hidden] { display: none; }
.panel .bar { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; flex-wrap: wrap; }
.panel .note { color: var(--muted); }
.panel .err { color: var(--danger); }
table.tt { border-collapse: collapse; font-family: ui-monospace, Menlo, Consolas, monospace; }
table.tt th, table.tt td { border: 1px solid var(--border); padding: 2px 9px; text-align: center; }
table.tt th { background: var(--bg); }
table.tt td.sep, table.tt th.sep { border-left: 3px double var(--muted); }
table.tt td.v1 { color: var(--wire1); font-weight: 700; }
table.tt td.vx { color: var(--wirex); font-weight: 700; }
.expr-card { border: 1px solid var(--border); border-radius: var(--radius); padding: 8px 10px; margin-bottom: 8px; }
.expr-card code { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 14px; }
.expr-card .meta { color: var(--muted); font-size: 12px; margin: 4px 0; }
#panel-expr input[type="text"] { width: min(520px, 100%); font-family: ui-monospace, Menlo, Consolas, monospace; }
#wave-host { overflow-x: auto; }
#wave-host svg { max-width: none; }
dl.keys { display: grid; grid-template-columns: max-content 1fr; gap: 3px 14px; margin: 0; }
dl.keys dt { font-family: ui-monospace, Menlo, Consolas, monospace; color: var(--accent); }
dl.keys dd { margin: 0; }
.lib-item { display: flex; gap: 8px; align-items: center; padding: 4px 0; border-bottom: 1px solid var(--border); }
.lib-item b { min-width: 140px; }
dialog { background: var(--panel); color: var(--fg); border: 1px solid var(--border); border-radius: 8px; min-width: 320px; max-width: 640px; }
dialog::backdrop { background: rgba(0, 0, 0, 0.45); }
dialog menu { display: flex; justify-content: flex-end; gap: 8px; padding: 0; margin: 14px 0 0; }
dialog input, dialog textarea { width: 100%; }
@media (max-width: 900px) {
  #main { flex-direction: column; }
  #palette { width: auto; max-height: 120px; border-right: none; border-bottom: 1px solid var(--border); }
  #props { width: auto; max-height: 150px; border-left: none; border-top: 1px solid var(--border); }
  #bottom { height: 220px; }
  #stage { min-height: 260px; }
}