:root {
  --hub-trail-bg: #f6fbff;
  --hub-trail-card: #ffffff;
  --hub-trail-ink: #17324d;
  --hub-trail-muted: #526b82;
  --hub-trail-line: #d9e6f5;
  --hub-trail-blue: #2563eb;
  --hub-trail-deep: #174a7c;
  --hub-trail-green: #10b981;
  --hub-trail-purple: #7c3aed;
  --hub-trail-danger: #dc2626;
  --hub-trail-warning: #f59e0b;
  --hub-trail-radius: 18px;
  --hub-trail-shadow: 0 12px 28px rgba(23, 74, 124, 0.09);
  --hub-trail-control-height: 44px;
}

.hub-trail-shell {
  width: min(1440px, calc(100% - 28px));
  margin-inline: auto;
  color: var(--hub-trail-ink);
}

.hub-trail-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 430px);
  gap: 12px;
  align-items: start;
}

.hub-trail-simulator,
.hub-trail-missions,
.hub-trail-panel,
.hub-trail-controls {
  min-width: 0;
  border: 1px solid var(--hub-trail-line);
  border-radius: var(--hub-trail-radius);
  background: var(--hub-trail-card);
  box-shadow: var(--hub-trail-shadow);
}

.hub-trail-panel,
.hub-trail-controls,
.hub-trail-missions {
  padding: 12px;
}

.hub-trail-controls input,
.hub-trail-controls select,
.hub-trail-controls textarea,
.hub-trail-controls button {
  width: 100%;
  min-height: var(--hub-trail-control-height);
  border-radius: 12px;
  font: inherit;
}

.hub-trail-controls input,
.hub-trail-controls select,
.hub-trail-controls textarea {
  border: 1px solid #94a3b8;
  background: #fff;
  color: var(--hub-trail-ink);
  padding: 9px 10px;
}

.hub-trail-button {
  border: 0;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 900;
  color: #fff;
  background: linear-gradient(135deg, var(--hub-trail-blue), var(--hub-trail-deep));
}

.hub-trail-button--secondary {
  background: linear-gradient(135deg, var(--hub-trail-green), #047857);
}

.hub-trail-button--danger {
  background: linear-gradient(135deg, #f97316, var(--hub-trail-danger));
}

.hub-trail-progress {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
}

.hub-trail-progress-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #cbd5e1;
}

.hub-trail-progress-dot[aria-current="step"] {
  background: linear-gradient(135deg, var(--hub-trail-blue), var(--hub-trail-purple));
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.hub-trail-option {
  display: block;
  width: 100%;
  min-height: var(--hub-trail-control-height);
  margin-top: 8px;
  border: 1px solid var(--hub-trail-line);
  border-radius: 14px;
  background: #fff;
  color: var(--hub-trail-deep);
  padding: 10px 12px;
  text-align: left;
  font-weight: 900;
  cursor: pointer;
}

.hub-trail-option[data-state="correct"] {
  border-color: #34d399;
  background: #ecfdf5;
  color: #065f46;
}

.hub-trail-option[data-state="incorrect"] {
  border-color: #fbbf24;
  background: #fffbeb;
  color: #92400e;
}

.hub-trail-feedback {
  margin-top: 10px;
  border: 1px solid var(--hub-trail-line);
  border-radius: 14px;
  background: #f8fbff;
  padding: 10px 11px;
  line-height: 1.4;
  font-weight: 800;
}

.hub-trail-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  margin-inline: auto;
  touch-action: none;
  border: 1px solid #94a3b8;
  border-radius: 16px;
  background: #fff;
}

@media (max-width: 980px) {
  .hub-trail-workspace {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .hub-trail-shell {
    width: min(100% - 16px, 1440px);
  }

  .hub-trail-panel,
  .hub-trail-controls,
  .hub-trail-missions {
    padding: 9px;
  }

  .hub-trail-button,
  .hub-trail-option {
    min-height: 46px;
  }
}