:root {
  --bg: #161616;
  --panel: #242424;
  --panel-2: #303030;
  --text: #ececec;
  --muted: #a8a8a8;
  --accent: #ffeb3b;
  --accent-text: #111;
  --border: #3a3a3a;
  color-scheme: dark;
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.4 system-ui, "Segoe UI", Roboto, sans-serif;
  overflow: hidden;
}
.bbl { display: flex; flex-direction: column; height: 100%; position: relative; }
.bbl-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
  padding: 8px 12px; background: var(--panel); border-bottom: 1px solid var(--border);
}
.bbl-toolbar button, .bbl-btn {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 10px; font: inherit; cursor: pointer; min-width: 34px;
}
.bbl-toolbar button:hover, .bbl-btn:hover { border-color: #666; }
.bbl-toolbar button:active { transform: translateY(1px); }
.bbl-primary, .bbl-toolbar button.bbl-primary { background: var(--accent); color: var(--accent-text); border-color: transparent; font-weight: 600; }
.bbl-toggle.bbl-on { background: #0b6; color: #fff; }
.bbl-count { min-width: 3.5em; text-align: center; color: var(--muted); font-variant-numeric: tabular-nums; }
.bbl-sep { width: 1px; height: 22px; background: var(--border); margin: 0 4px; }
.bbl-group { display: inline-flex; align-items: center; gap: 3px; color: var(--muted); }
.bbl-group button { min-width: 30px; padding: 4px 6px; }
.bbl-swatches { display: inline-flex; gap: 4px; margin-left: 4px; }
.bbl-toolbar .bbl-swatch { width: 24px; height: 24px; min-width: 0; padding: 0; border-radius: 50%; border: 2px solid #777; }
.bbl-toolbar .bbl-swatch:hover { border-color: #fff; }
.bbl-toolbar .bbl-swatch-custom { border-style: dashed; }
.bbl-toolbar .bbl-add { min-width: 28px; padding: 4px 8px; font-weight: 700; }
.bbl-format {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 8px; font: inherit; cursor: pointer;
}
.bbl-colour { width: 34px; height: 30px; padding: 0 2px; border: 1px solid var(--border); border-radius: 6px; background: var(--panel-2); cursor: pointer; }
.bbl-hex {
  width: 7.4em; height: 30px; padding: 0 6px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--panel-2); color: var(--text); font: 12.5px ui-monospace, Consolas, monospace; text-transform: uppercase;
}
.bbl-hex:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.bbl-hex::placeholder { color: #777; text-transform: none; }
.bbl-status {
  padding: 4px 12px; background: #1d1d1d; color: var(--muted); font-size: 12.5px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis; border-bottom: 1px solid var(--border);
}
.bbl-body { display: flex; flex: 1; min-height: 0; }
.bbl-stage { position: relative; flex: 1; min-width: 0; min-height: 0; background: #101010; }
.bbl-stage.bbl-armed .bbl-canvas { cursor: copy; }
/* AD2 / AD3 pinout: a 15 x 2 grid of pin buttons in the wire colours, to the right of the photo */
.bbl-pins {
  width: 176px; flex: none; overflow-y: auto; background: var(--panel); border-left: 1px solid var(--border);
  padding: 8px; display: flex; flex-direction: column; gap: 6px;
}
.bbl-pins[hidden] { display: none; }
.bbl-pins-head { display: flex; align-items: center; justify-content: space-between; font-size: 13px; }
.bbl-pins-head button { background: none; border: 0; color: var(--muted); font-size: 20px; line-height: 1; cursor: pointer; padding: 0 4px; }
.bbl-pins-head button:hover { color: var(--text); }
.bbl-pins-hint { color: var(--muted); font-size: 11.5px; line-height: 1.3; }
.bbl-pins-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4px; }
.bbl-pins-col { color: var(--muted); font-size: 10.5px; text-align: center; }
.bbl-pin {
  background: var(--c); border: 2px solid #555; border-radius: 6px; padding: 5px 3px; min-width: 0;
  font: inherit; font-weight: 700; font-size: 12px; line-height: 1.1; cursor: pointer; white-space: nowrap;
}
.bbl-pin-striped { box-shadow: inset 0 6px 0 var(--s); padding-top: 9px; padding-bottom: 1px; }
.bbl-pin:not(:disabled):hover { border-color: #fff; }
.bbl-pin.bbl-on { border-color: #fff; outline: 3px solid #00E5FF; outline-offset: 1px; }
.bbl-pin:disabled { opacity: 0.3; filter: grayscale(1); cursor: not-allowed; border-color: #444; }   /* already on this photo */
.bbl-canvas { display: block; touch-action: none; cursor: crosshair; user-select: none; -webkit-user-select: none; }
.bbl-entry {
  position: absolute; transform: translate(-50%, -50%); z-index: 3;
  font: bold 16px Arial, Helvetica, sans-serif; text-align: center;
  border: 2px solid #000; border-radius: 6px; padding: 2px 8px; outline: none;
}
.bbl-drop {
  position: absolute; inset: 0; display: flex; flex-direction: column; gap: 16px; align-items: center; justify-content: center;
  color: var(--muted); font-size: 18px; pointer-events: none; text-align: center; padding: 16px;
}
.bbl-resume {
  pointer-events: auto; background: var(--accent); color: var(--accent-text); border: 0; border-radius: 8px;
  padding: 10px 18px; font: inherit; font-weight: 600; cursor: pointer;
}
.bbl-resume[hidden] { display: none; }
.bbl-saveto {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 8px; font: inherit; cursor: pointer;
}
.bbl-saveto[hidden] { display: none; }
.bbl-drop[hidden] { display: none; }
.bbl-stage.bbl-over { outline: 3px dashed var(--accent); outline-offset: -6px; }
.bbl-help {
  position: absolute; top: 12px; right: 12px; z-index: 4; background: var(--panel); border: 1px solid var(--border);
  border-radius: 8px; padding: 10px 14px; max-width: min(420px, calc(100vw - 32px)); box-shadow: 0 6px 24px #0008;
  display: grid; grid-template-columns: auto 1fr; gap: 4px 12px; font-size: 13px;
}
.bbl-help[hidden] { display: none; }
.bbl-help div { display: contents; }
.bbl-help b { color: var(--accent); font-weight: 600; white-space: nowrap; }
.bbl-help span { color: var(--muted); }
.bbl-dialog {
  position: absolute; inset: 0; z-index: 10; display: flex; align-items: center; justify-content: center;
  background: #000a; padding: 16px;
}
.bbl-dialog[hidden] { display: none; }
.bbl-dialog-box {
  background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 18px 20px;
  max-width: min(460px, 100%); box-shadow: 0 10px 40px #000c;
}
.bbl-dialog-text { margin: 0 0 8px; font-size: 15px; }
.bbl-dialog-note { margin: 0 0 16px; color: var(--muted); font-size: 13px; }
.bbl-dialog-note[hidden] { display: none; }
.bbl-dialog-buttons { display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
.bbl-dialog-buttons button {
  background: var(--panel-2); color: var(--text); border: 1px solid var(--border);
  border-radius: 6px; padding: 7px 14px; font: inherit; cursor: pointer;
}
.bbl-dialog-buttons button:hover { border-color: #666; }
.bbl-dialog-buttons button.bbl-primary { background: var(--accent); color: var(--accent-text); border-color: transparent; font-weight: 600; }
.bbl-dialog-buttons button:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
@media (max-width: 700px) {
  .bbl-pins { width: 122px; padding: 6px; }
  .bbl-pins-hint { display: none; }
  .bbl-pin { font-size: 11px; padding: 4px 2px; }
  .bbl-toolbar { padding: 6px 8px; gap: 4px; }
  .bbl-toolbar button, .bbl-btn { padding: 6px 8px; }
  .bbl-sep { display: none; }
}