:root {
  --sim-bg: #08111d;
  --sim-panel: #0f1c2d;
  --sim-panel-strong: #14243a;
  --sim-border: #203653;
  --sim-accent: #2dd4bf;
  --sim-warning: #f59e0b;
  --sim-danger: #ef4444;
  --sim-text: #e6edf6;
  --sim-muted: #8ea2bd;
}

body {
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(45, 212, 191, 0.12), transparent 30%),
    linear-gradient(180deg, #08111d 0%, #050a12 100%);
  color: var(--sim-text);
  font-family: "Inter", system-ui, sans-serif;
}

.sim-shell {
  min-height: 100vh;
}

.hero-panel,
.panel-card,
.subpanel {
  background: rgba(15, 28, 45, 0.92);
  border: 1px solid var(--sim-border);
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.25);
}

.eyebrow,
.panel-label {
  color: var(--sim-accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 700;
}

.lead,
.text-secondary {
  color: var(--sim-muted) !important;
}

.board-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}

.board-cell {
  position: relative;
  min-height: 164px;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  color: var(--sim-text);
  padding: 0.9rem;
  text-align: left;
  overflow: hidden;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.board-cell:hover {
  transform: translateY(-2px);
  border-color: rgba(45, 212, 191, 0.55);
}

.board-cell.occupied {
  border-color: rgba(245, 158, 11, 0.7);
}

.board-cell.waiting-cell {
  border-color: rgba(45, 212, 191, 0.72);
  box-shadow: inset 0 0 0 1px rgba(45, 212, 191, 0.22), 0 0 22px rgba(45, 212, 191, 0.12);
}

.board-cell.drag-over {
  border-color: rgba(34, 197, 94, 0.86);
  box-shadow: inset 0 0 0 1px rgba(34, 197, 94, 0.34), 0 0 24px rgba(34, 197, 94, 0.15);
}

.board-cell.drop-blocked {
  border-color: rgba(239, 68, 68, 0.8);
  box-shadow: inset 0 0 0 1px rgba(239, 68, 68, 0.3), 0 0 24px rgba(239, 68, 68, 0.12);
}

.board-cell .cell-id {
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--sim-muted);
}

.board-cell .cell-status {
  color: var(--sim-muted);
  font-size: 0.78rem;
  font-weight: 700;
}

.board-cell .led-arms {
  position: relative;
  width: 76px;
  height: 76px;
  margin: 0.6rem auto 1.85rem;
}

.board-cell .led-arm {
  position: absolute;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--led-render-color, var(--led-color));
  border: 1px solid rgba(255, 255, 255, 0.26);
  box-shadow: 0 0 var(--led-glow, 14px) var(--led-render-color, var(--led-color));
}

.board-cell .led-arm.off {
  opacity: 0.28;
  box-shadow: none;
}

.board-cell .led-arm-center {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.board-cell .led-arm-nw {
  top: 18%;
  left: 18%;
  transform: translate(-50%, -50%);
}

.board-cell .led-arm-ne {
  top: 18%;
  left: 82%;
  transform: translate(-50%, -50%);
}

.board-cell .led-arm-se {
  top: 82%;
  left: 82%;
  transform: translate(-50%, -50%);
}

.board-cell .led-arm-sw {
  top: 82%;
  left: 18%;
  transform: translate(-50%, -50%);
}

.cell-pawn-slot {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 2;
}

.pawn-tray {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border: 1px dashed rgba(142, 162, 189, 0.38);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  padding: 0.85rem 1rem;
  transition: border-color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.pawn-tray.drag-over {
  border-color: rgba(45, 212, 191, 0.82);
  background: rgba(45, 212, 191, 0.08);
  box-shadow: 0 0 24px rgba(45, 212, 191, 0.1);
}

.pawn-tray-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.55rem;
}

.pawn-token {
  display: inline-flex;
  align-items: center;
  gap: 0.38rem;
  max-width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(8, 17, 29, 0.88);
  color: var(--sim-text);
  cursor: grab;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.34rem 0.62rem;
  user-select: none;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
}

.pawn-token:active,
.pawn-token.dragging {
  cursor: grabbing;
  opacity: 0.62;
}

.pawn-token i {
  color: var(--sim-warning);
  font-size: 0.68rem;
}

.pawn-token span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pawn-token-board {
  width: 4.65rem;
  height: 4.65rem;
  justify-content: center;
  pointer-events: auto;
  border-radius: 50%;
  border-color: rgba(255, 255, 255, 0.52);
  background: rgba(255, 255, 255, 0.28);
  color: rgba(8, 17, 29, 0.82);
  padding: 0;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14), 0 12px 28px rgba(0, 0, 0, 0.2);
}

.pawn-token-board i,
.pawn-token-board span {
  display: none;
}

.pawn-token-board::after {
  content: attr(data-pawn-short);
  font-size: 0.92rem;
  font-weight: 800;
}

.pawn-token-recognized {
  border-color: rgba(45, 212, 191, 0.5);
  background: rgba(45, 212, 191, 0.12);
}

.log-feed {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 340px;
  overflow-y: auto;
}

.trace-feed {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  max-height: 220px;
  overflow-y: auto;
}

.trace-entry {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 0.55rem 0.7rem;
  font-size: 0.78rem;
}

.trace-entry time,
.trace-entry span:last-child {
  color: var(--sim-muted);
  white-space: nowrap;
}

.log-entry {
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 0.75rem 0.9rem;
}

.log-entry time {
  display: block;
  color: var(--sim-muted);
  font-size: 0.72rem;
  margin-bottom: 0.2rem;
}

.state-dump {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--sim-text);
  background: transparent;
  font-size: 0.85rem;
}

.scenario-step {
  min-width: min(100%, 260px);
  border: 1px solid rgba(45, 212, 191, 0.26);
  border-radius: 14px;
  background: rgba(45, 212, 191, 0.08);
}

.waiting-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.035);
  padding: 0.85rem 1rem;
}

.waiting-banner-active {
  border-color: rgba(45, 212, 191, 0.34);
  background: rgba(45, 212, 191, 0.08);
}

.waiting-banner-complete {
  border-color: rgba(34, 197, 94, 0.42);
  background: rgba(34, 197, 94, 0.08);
}

.waiting-detail {
  margin-top: 0.12rem;
  color: var(--sim-muted);
  font-size: 0.82rem;
}

.waiting-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.45rem;
}

.waiting-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  background: rgba(8, 17, 29, 0.72);
  color: var(--sim-text);
  padding: 0.28rem 0.55rem;
  font-size: 0.78rem;
  white-space: nowrap;
}

.waiting-chip span {
  color: var(--sim-muted);
}

.scenario-source {
  max-height: 520px;
  overflow: auto;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  background: rgba(3, 7, 14, 0.55);
  padding: 0.7rem 0;
}

.scenario-line {
  display: grid;
  grid-template-columns: 4.2rem minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.12rem 1rem;
  border-left: 3px solid transparent;
  color: rgba(230, 237, 246, 0.78);
  font-size: 0.82rem;
  line-height: 1.55;
}

.scenario-line code {
  display: block;
  color: inherit;
  white-space: pre-wrap;
  word-break: break-word;
  background: transparent;
  padding: 0;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.scenario-line-number {
  color: rgba(142, 162, 189, 0.74);
  text-align: right;
  user-select: none;
}

.scenario-line-active {
  border-left-color: var(--sim-accent);
  background: rgba(45, 212, 191, 0.1);
  color: var(--sim-text);
}

.scenario-line-heading {
  background: rgba(45, 212, 191, 0.18);
  color: #ffffff;
  font-weight: 700;
}

.scenario-empty {
  padding: 1rem;
  color: var(--sim-muted);
  font-size: 0.9rem;
}

@media (max-width: 767.98px) {
  .board-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .scenario-line {
    grid-template-columns: 3rem minmax(0, 1fr);
    padding-right: 0.75rem;
  }

  .waiting-banner {
    align-items: flex-start;
    flex-direction: column;
  }

  .waiting-chips {
    justify-content: flex-start;
  }
}