.rng-shell {
  display: grid;
  grid-template-columns: minmax(320px, 1.05fr) minmax(260px, 0.95fr);
  gap: 16px;
  align-items: start;
}

@media (max-width: 960px) {
  .rng-shell {
    grid-template-columns: 1fr;
  }
}

.rng-stepper {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.rng-stepper span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border, #d0d7de);
  background: linear-gradient(135deg, #f7fbff, #eef2ff);
  color: #0b3b70;
  font-weight: 600;
  font-size: 13px;
}

.rng-stepper span .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #2563eb;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.rng-panel {
  border: 1px solid var(--border, #d0d7de);
  border-radius: 14px;
  padding: 14px 16px;
  background: linear-gradient(145deg, #f9fbff, #f3f6ff);
  box-shadow: 0 10px 35px rgba(15, 23, 42, 0.08);
}

.rng-panel h3 {
  margin: 0 0 6px;
  font-size: 16px;
}

.rng-subtext {
  margin: 0 0 10px;
  color: var(--muted, #475569);
  font-size: 14px;
}

.rng-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.rng-grid label span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.rng-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  background: rgba(37, 99, 235, 0.08);
  color: #1d4ed8;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.rng-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-top: 12px;
}

.rng-toggle {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding: 10px 12px;
  border: 1px solid var(--border, #d0d7de);
  border-radius: 12px;
  background: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.rng-toggle input {
  margin-top: 4px;
}

.rng-toggle strong {
  display: block;
  font-size: 14px;
}

.rng-toggle small {
  color: var(--muted, #475569);
  display: block;
  margin-top: 2px;
}

.rng-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 12px;
}

.rng-actions .primary {
  min-width: 160px;
}

.rng-output {
  margin-top: 10px;
  padding: 14px;
  min-height: 160px;
  border: 1px solid var(--border, #d0d7de);
  border-radius: 12px;
  background: #0b1220;
  color: #e2e8f0;
  font-family: ui-monospace, SFMono-Regular, Consolas, 'Liberation Mono', Menlo, monospace;
  white-space: pre-wrap;
  word-break: break-word;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.rng-banner {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #fca5a5;
  background: #fef2f2;
  color: #7f1d1d;
  margin-bottom: 8px;
}

.rng-status {
  font-size: 14px;
  color: var(--muted, #475569);
  margin-top: 6px;
}

.rng-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.rng-note-card {
  border: 1px dashed var(--border, #d0d7de);
  border-radius: 12px;
  padding: 12px;
  background: #fff;
}