.spec-frame { display: flex; flex: 1; min-height: 0; }
#board {
  flex: 1; min-width: 0; overflow: auto; position: relative;
  background: var(--paper);
}
#panel {
  width: 300px; min-width: 240px; border-left: 1.5px solid var(--ink);
  overflow-y: auto; background: var(--paper);
}
#legend {
  border-bottom: 1.5px solid var(--ink); padding: 8px 14px; font-size: 11px;
  line-height: 1.5; background: var(--paper-hi);
}
#legend .swatch {
  display: inline-block; width: 18px; height: 3px; vertical-align: middle;
  margin: 0 6px 0 12px;
}
.swatch.river { background: var(--ink); }
.swatch.gate { background: var(--ink); outline: 1px dashed var(--ink); height: 0;
  border-top: 2px dashed var(--ink); background: none; }
.swatch.cap { background: var(--ink); opacity: 0.35; }
.swatch.back { background: var(--ink); height: 0; border-top: 2px dotted var(--ink); }
.swatch.ops { background: var(--ink-faint); }

#river {
  border-bottom: 1.5px solid var(--ink); padding: 10px 16px 14px;
  background: var(--paper-hi);
}
.river-kicker {
  font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-faint); margin-bottom: 10px;
}
#river-row {
  display: flex; align-items: stretch; gap: 0; overflow-x: auto;
}
.river-node {
  flex: 1 1 0; min-width: 110px; border: 1.5px solid var(--ink);
  background: var(--paper); padding: 8px 8px 10px; cursor: pointer;
  text-align: left;
}
.river-node.tip {
  background: var(--ink); color: var(--paper);
}
.river-node.selected { outline: 2px solid var(--ink); outline-offset: -4px; }
.river-node .st { font-size: 8px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-faint); }
.river-node.tip .st { color: var(--paper-lo); }
.river-node .nm { font-size: 12px; font-weight: 700; letter-spacing: 0.04em;
  text-transform: uppercase; margin-top: 2px; }
.river-arrow {
  flex: 0 0 22px; display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: var(--ink);
}

#assembly { position: relative; padding: 14px 16px 28px; }
#cols {
  display: grid; grid-template-columns: repeat(6, minmax(180px, 1fr));
  gap: 14px; position: relative; z-index: 1;
}
.col {
  border: 1.5px solid var(--ink); background: var(--paper);
  display: flex; flex-direction: column; min-height: 0;
}
.col.tipcol { background: var(--paper-hi); }
.col-head {
  border-bottom: 1.5px solid var(--ink); padding: 8px 10px 8px;
}
.col.tipcol .col-head { background: var(--ink); color: var(--paper); }
.col-stage { font-size: 8px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-faint); }
.col.tipcol .col-stage { color: var(--paper-lo); }
.col-title { font-size: 13px; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; margin-top: 2px; }
.col-kicker { font-size: 9px; line-height: 1.35; margin-top: 4px; color: var(--ink-soft); }
.col.tipcol .col-kicker { color: var(--paper-lo); }
.col-body { padding: 8px; display: flex; flex-direction: column; gap: 6px; }

.card {
  border: 1.5px solid var(--ink); background: var(--paper); padding: 7px 8px;
  cursor: pointer; text-align: left; width: 100%;
}
.card:hover, .card.selected { background: var(--ink); color: var(--paper); }
.card.tip { background: var(--ink); color: var(--paper); }
.card.tip:hover, .card.tip.selected { background: var(--paper); color: var(--ink); }
.card.cap { background: repeating-linear-gradient(
  -45deg, var(--paper), var(--paper) 4px, var(--paper-lo) 4px, var(--paper-lo) 5px); }
.card.gate { box-shadow: inset 0 0 0 2px var(--ink); }
.card.core { border-width: 2.5px; }
.card .let {
  font-size: 8px; letter-spacing: 0.14em; color: var(--ink-faint);
  text-transform: uppercase;
}
.card:hover .let, .card.selected .let, .card.tip .let { color: inherit; opacity: 0.7; }
.card .nm { font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.04em; margin-top: 1px; }
.card .ln { font-size: 10px; line-height: 1.35; margin-top: 3px; color: var(--ink-soft); }
.card:hover .ln, .card.selected .ln { color: var(--paper-lo); }
.card.tip .ln { color: var(--paper-lo); }
.card.tip:hover .ln, .card.tip.selected .ln { color: var(--ink-soft); }

#wires {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; z-index: 0; overflow: visible;
}
#wires path { fill: none; stroke: var(--ink); stroke-width: 1.15; opacity: 0.55; }
#wires path.river { stroke-width: 2.1; opacity: 0.9; }
#wires path.gate { stroke-dasharray: 4 3; }
#wires path.cap { stroke-dasharray: 2 4; opacity: 0.4; }
#wires path.back { stroke-dasharray: 1 3; opacity: 0.5; }
#wires path.ops { stroke-width: 1; opacity: 0.4; }
#wires path.join, #wires path.prior, #wires path.queue, #wires path.in { opacity: 0.4; }
#wires path.lit { opacity: 1; stroke-width: 2.4; }
.packet {
  fill: var(--ink); stroke: var(--paper); stroke-width: 1.5;
}

.panel-kicker { font-size: 9px; letter-spacing: 0.16em; color: var(--ink-faint);
  padding: 12px 14px 0; text-transform: uppercase; }
.panel-title { font-size: 16px; font-weight: 700; padding: 4px 14px 0;
  text-transform: uppercase; }
.panel-one { font-size: 12px; padding: 8px 14px 12px; line-height: 1.45; }
.panel-edges { padding: 0 14px 14px; font-size: 10px; }
.panel-edges div { border-top: 1px solid var(--ink); padding: 5px 0; }
.panel-edges .dir { color: var(--ink-faint); letter-spacing: 0.08em;
  text-transform: uppercase; font-size: 8px; }