:root {
  --bg: #14161a;
  --panel: #1c1f26;
  --panel-2: #232732;
  --line: #333844;
  --txt: #e6e8ec;
  --txt-dim: #9aa1ad;
  --accent: #C8F000;
  --accent-2: #36b3f4;
  --red: #ff5a52;
  --amber: #ffb838;
  --green: #38d478;
  --radius: 9px;
  font-family: -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--txt); }
button { font: inherit; color: inherit; cursor: pointer; }
input, select, textarea { font: inherit; }

.app { display: grid; grid-template-rows: auto 1fr; height: 100vh; }

header.topbar {
  display: flex; align-items: center; gap: 14px;
  padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
header .brand { font-weight: 800; letter-spacing: .5px; }
header .brand b { color: var(--accent); }
header .spacer { flex: 1; }
header .meta-field { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--txt-dim); }
header .meta-field input, header .meta-field select {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--txt);
  border-radius: 6px; padding: 5px 8px;
}
.btn {
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 7px;
  padding: 7px 13px; color: var(--txt); font-weight: 600;
}
.btn:hover { border-color: var(--accent-2); }
.btn.primary { background: var(--accent); color: #10130a; border-color: var(--accent); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; }

.main { display: grid; grid-template-columns: minmax(520px, 1fr) 420px; overflow: hidden; }
@media (max-width: 1100px) { .main { grid-template-columns: 1fr; grid-template-rows: auto 1fr; } }

.board-wrap { padding: 18px; overflow: auto; }
.layers { margin-bottom: 12px; display: flex; flex-direction: column; gap: 7px; }
.tabrow { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.layer-tab, .unit-tab {
  padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--panel); color: var(--txt-dim); font-weight: 600; font-size: 13px;
}
.layer-tab.active { background: var(--accent); color: #10130a; border-color: var(--accent); }
.unit-tab { border-radius: 7px; }
.unit-tab.active { background: var(--accent-2); color: #06212e; border-color: var(--accent-2); }
.layer-tab .x { margin-left: 7px; opacity: .6; }
.layer-tab .x:hover { opacity: 1; }

.boards { display: flex; gap: 22px; justify-content: center; align-items: flex-start; flex-wrap: wrap; }
.boards.multi { justify-content: flex-start; }
.board-unit { flex: 0 0 auto; max-width: 400px; }
.board-cap { text-align: center; font-size: 12px; color: var(--txt-dim); margin-bottom: 6px; }
.board-cap b { color: var(--accent-2); }
svg.k2 { display: block; width: 100%; max-width: 400px; height: auto; }
.boards.multi svg.k2 { max-width: 340px; }
svg.k2 .ctl { cursor: pointer; }
svg.k2 .ctl:hover .knob, svg.k2 .ctl:hover .btn, svg.k2 .ctl:hover .fader-cap { stroke: var(--accent-2) !important; }
svg.k2 text { pointer-events: none; }

.modal.setup { width: min(560px, 92vw); }
.modal.setup header { padding: 14px 16px; border-bottom: 1px solid var(--line); }
.setup-body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.setup-body .row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.setup-body .row.end { justify-content: flex-end; margin-top: 6px; }
.setup-body label { font-size: 12px; color: var(--txt-dim); min-width: 110px; }
.setup-body input[type=text], .setup-body select {
  background: var(--panel-2); border: 1px solid var(--line); color: var(--txt); border-radius: 6px; padding: 6px 9px;
}
.setup-body .u-name { width: 120px; }
.setup-body .hint { font-size: 12px; color: var(--txt-dim); line-height: 1.5; margin: 0; background: var(--panel-2); padding: 9px 11px; border-radius: 7px; }

.inspector { background: var(--panel); border-left: 1px solid var(--line); overflow-y: auto; padding: 16px; }
.inspector h2 { margin: 0 0 4px; font-size: 15px; }
.inspector .sub { color: var(--txt-dim); font-size: 12px; margin-bottom: 14px; }
.inspector .empty { color: var(--txt-dim); font-size: 13px; text-align: center; padding: 40px 10px; }

.assign-card { background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; margin-bottom: 12px; }
.assign-card .row { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.assign-card .row:last-child { margin-bottom: 0; }
.assign-card label { font-size: 11px; color: var(--txt-dim); width: 74px; flex-shrink: 0; text-transform: uppercase; letter-spacing: .4px; }
.assign-card select, .assign-card input[type=text], .assign-card input[type=number] {
  flex: 1; background: var(--panel); border: 1px solid var(--line); color: var(--txt);
  border-radius: 6px; padding: 6px 8px; min-width: 0;
}
.assign-card .side-tag { font-size: 10px; font-weight: 700; padding: 2px 7px; border-radius: 4px; }
.assign-card .side-tag.in { background: #33402a; color: var(--accent); }
.assign-card .side-tag.out { background: #2f3a44; color: var(--accent-2); }
.assign-card .cmd-btn {
  flex: 1; text-align: left; background: var(--panel); border: 1px solid var(--line);
  border-radius: 6px; padding: 7px 9px; color: var(--txt);
}
.assign-card .cmd-btn.empty { color: var(--txt-dim); font-style: italic; }
.assign-card .del { margin-left: auto; background: transparent; border: 0; color: var(--red); font-size: 12px; }
.mods { margin-top: 6px; padding-top: 8px; border-top: 1px dashed var(--line); }
.mod-row { display: flex; gap: 6px; align-items: center; margin-bottom: 6px; }
.mod-row select { flex: 1; background: var(--panel); border: 1px solid var(--line); color: var(--txt); border-radius: 6px; padding: 5px; }
.led-swatches { display: flex; gap: 6px; }
.led-swatch { width: 26px; height: 22px; border-radius: 5px; border: 2px solid transparent; }
.led-swatch.red { background: var(--red); } .led-swatch.amber { background: var(--amber); } .led-swatch.green { background: var(--green); }
.led-swatch.sel { border-color: #fff; }

.add-assign { display: flex; gap: 8px; margin-top: 6px; }
.add-assign .btn { flex: 1; }

/* command picker modal */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center; z-index: 50; }
.modal { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; width: min(760px, 92vw); max-height: 82vh; display: flex; flex-direction: column; overflow: hidden; }
.modal header { padding: 14px 16px; border-bottom: 1px solid var(--line); display: flex; gap: 10px; align-items: center; }
.modal header input { flex: 1; background: var(--panel-2); border: 1px solid var(--line); color: var(--txt); border-radius: 7px; padding: 9px 11px; }
.modal .list { overflow-y: auto; padding: 6px; }
.modal .cat { font-size: 11px; text-transform: uppercase; letter-spacing: .6px; color: var(--txt-dim); padding: 10px 10px 4px; }
.modal .cmd { padding: 8px 10px; border-radius: 7px; display: flex; gap: 8px; align-items: baseline; }
.modal .cmd:hover, .modal .cmd.active { background: var(--panel-2); }
.modal .cmd .nm { font-weight: 600; }
.modal .cmd .io { font-size: 10px; color: var(--txt-dim); }
.modal .cmd .id { margin-left: auto; font-size: 10px; color: #555b68; font-family: ui-monospace, monospace; }

.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--panel-2); border: 1px solid var(--line); border-radius: 9px; padding: 10px 16px; font-size: 13px; z-index: 80; }
.toast.err { border-color: var(--red); color: #ffd9d7; }
a.srclink { color: var(--txt-dim); font-size: 11px; text-decoration: none; }
a.srclink:hover { color: var(--accent-2); }