/* Engine circuit-lab: el simulador es el protagonista. Tablero de taller con colores vivos, medidores
   tipo multímetro, lista de chequeo que se enciende sola y celebración con chispas. */
.circuit-lab {
  --cl-ink: #0f172a;
  --cl-muted: #475569;
  --cl-bg: #f8fafc;
  --cl-card: #ffffff;
  --cl-accent: #f59e0b;
  --cl-accent-ink: #78350f;
  --cl-ok: #16a34a;
  --cl-bad: #dc2626;
  --cl-blue: #2563eb;
  --cl-radius: 18px;
  position: relative;
  display: grid;
  gap: 1rem;
  overflow: hidden;
  background:
    radial-gradient(circle at 12% 0%, rgba(245, 158, 11, 0.16), transparent 42%),
    radial-gradient(circle at 100% 20%, rgba(37, 99, 235, 0.14), transparent 40%),
    var(--cl-bg);
}
.circuit-lab-header { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 0.75rem; }
.circuit-lab-header h1 { margin: 0.2rem 0; font-size: clamp(1.4rem, 2.6vw, 2rem); color: var(--cl-ink); }
.circuit-lab-header p { margin: 0; color: var(--cl-muted); max-width: 46rem; }
.circuit-lab-progress {
  display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.45rem 0.85rem; border-radius: 999px;
  background: var(--cl-ink); color: #fde68a; font-weight: 700; box-shadow: 0 6px 18px rgba(15, 23, 42, 0.25);
}
.circuit-lab-steps { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.circuit-lab-step {
  display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.45rem 0.85rem 0.45rem 0.45rem;
  border: 2px solid #e2e8f0; border-radius: 999px; background: var(--cl-card); color: var(--cl-ink);
  font-weight: 600; cursor: pointer; transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}
.circuit-lab-step:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(15, 23, 42, 0.12); }
.circuit-lab-step[aria-current="step"] { border-color: var(--cl-accent); box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.25); }
.circuit-lab-step-index {
  display: grid; place-items: center; width: 1.8rem; height: 1.8rem; border-radius: 50%;
  background: #e2e8f0; font-weight: 800;
}
.circuit-lab-step.is-done .circuit-lab-step-index { background: var(--cl-ok); color: #fff; }
.circuit-lab-step.is-done .circuit-lab-step-index::after { content: "✓"; }
.circuit-lab-step.is-done .circuit-lab-step-index { font-size: 0; }
.circuit-lab-step.is-done .circuit-lab-step-index::after { font-size: 1rem; }

.circuit-lab-stage { display: grid; grid-template-columns: minmax(17rem, 23rem) minmax(0, 1fr); gap: 1rem; align-items: start; }
@media (max-width: 900px) { .circuit-lab-stage { grid-template-columns: 1fr; } .circuit-lab-bench { order: -1; } }

.circuit-lab-mission {
  background: var(--cl-card); border-radius: var(--cl-radius); padding: 1rem 1.1rem;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.08); border: 1px solid #e2e8f0;
}
.circuit-lab-mission-body { display: grid; gap: 0.75rem; animation: cl-rise 280ms ease both; }
.circuit-lab-kind { justify-self: start; padding: 0.25rem 0.65rem; border-radius: 999px; font-size: 0.8rem; font-weight: 800; letter-spacing: 0.02em; }
.circuit-lab-kind--predict { background: #ede9fe; color: #5b21b6; }
.circuit-lab-kind--contrast { background: #fee2e2; color: #991b1b; }
.circuit-lab-kind--build { background: #dbeafe; color: #1e40af; }
.circuit-lab-kind--transfer { background: #dcfce7; color: #166534; }
.circuit-lab-kind--blocks { background: #fef3c7; color: var(--cl-accent-ink); }
.circuit-lab-mission-title { margin: 0; font-size: 1.25rem; color: var(--cl-ink); }
.circuit-lab-mission-text { margin: 0; color: var(--cl-muted); font-size: 1.02rem; line-height: 1.5; }

.circuit-lab-predict { display: grid; gap: 0.5rem; padding: 0.75rem; border-radius: 14px; background: #f5f3ff; border: 2px dashed #a78bfa; }
.circuit-lab-predict.is-locked-in { border-style: solid; }
.circuit-lab-predict-options, .circuit-lab-control-options { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.circuit-lab-chip {
  padding: 0.45rem 0.8rem; border-radius: 12px; border: 2px solid #cbd5e1; background: #fff; color: var(--cl-ink);
  font-weight: 700; cursor: pointer; transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}
.circuit-lab-chip:hover:not(:disabled) { transform: scale(1.04); }
.circuit-lab-chip[aria-pressed="true"] { background: var(--cl-ink); border-color: var(--cl-ink); color: #fde68a; }
.circuit-lab-chip:disabled:not([aria-pressed="true"]) { opacity: 0.45; cursor: default; }
.circuit-lab-control { display: grid; gap: 0.35rem; }
.circuit-lab-control-label { font-size: 0.85rem; font-weight: 800; color: var(--cl-muted); text-transform: uppercase; letter-spacing: 0.04em; }

.circuit-lab-meters { display: grid; grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr)); gap: 0.5rem; }
.circuit-lab-meter {
  display: grid; gap: 0.15rem; padding: 0.55rem 0.7rem; border-radius: 12px;
  background: linear-gradient(160deg, #111827, #1f2937); color: #e5e7eb; box-shadow: inset 0 0 0 2px #374151;
}
.circuit-lab-meter-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: #9ca3af; }
.circuit-lab-meter-value { font: 700 1.25rem/1.1 ui-monospace, "Cascadia Mono", Consolas, monospace; color: #86efac; text-shadow: 0 0 10px rgba(134, 239, 172, 0.45); }

.circuit-lab-checklist { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
.circuit-lab-check { display: flex; gap: 0.5rem; align-items: flex-start; padding: 0.45rem 0.6rem; border-radius: 10px; background: #f1f5f9; color: var(--cl-ink); transition: background 240ms ease; }
.circuit-lab-check::before { content: "○"; font-weight: 900; color: #94a3b8; }
.circuit-lab-check.is-done { background: #dcfce7; animation: cl-pop 380ms ease; }
.circuit-lab-check.is-done::before { content: "✓"; color: var(--cl-ok); }

.circuit-lab-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.circuit-lab-button { padding: 0.6rem 1rem; border-radius: 12px; border: 2px solid #cbd5e1; background: #fff; font-weight: 800; cursor: pointer; color: var(--cl-ink); }
.circuit-lab-button--primary { background: var(--cl-accent); border-color: var(--cl-accent); color: #1c1917; box-shadow: 0 6px 16px rgba(245, 158, 11, 0.35); }
.circuit-lab-button--run { background: var(--cl-ok); border-color: var(--cl-ok); color: #fff; }
.circuit-lab-button--run[data-running="true"] { background: var(--cl-bad); border-color: var(--cl-bad); }
.circuit-lab-button:hover { transform: translateY(-1px); }

.circuit-lab-feedback { padding: 0.8rem; border-radius: 14px; border: 2px solid; animation: cl-rise 240ms ease both; }
.circuit-lab-feedback[data-tone="success"] { border-color: var(--cl-ok); background: #f0fdf4; }
.circuit-lab-feedback[data-tone="retry"] { border-color: var(--cl-bad); background: #fef2f2; }
.circuit-lab-verdict { display: flex; justify-content: space-between; gap: 0.5rem; margin: 0 0 0.4rem; font-size: 1.1rem; }
.circuit-lab-attempt { font-size: 0.8rem; font-weight: 700; color: var(--cl-muted); }
.circuit-lab-feedback-rows { margin: 0; display: grid; gap: 0.2rem; }
.circuit-lab-feedback-rows dt { font-size: 0.75rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.04em; color: var(--cl-muted); }
.circuit-lab-feedback-rows dd { margin: 0 0 0.3rem; color: var(--cl-ink); }

.circuit-lab-bench { display: grid; gap: 0.5rem; }
.circuit-lab-sim {
  position: relative; min-height: 26rem; border-radius: var(--cl-radius); overflow: hidden; background: #fff;
  border: 3px solid var(--cl-ink); box-shadow: 0 18px 40px rgba(15, 23, 42, 0.18);
}
.circuit-lab-iframe { display: block; width: 100%; height: 26rem; border: 0; }
.circuit-lab--blocks .circuit-lab-iframe, .circuit-lab--blocks .circuit-lab-sim { height: 20rem; min-height: 20rem; }
.circuit-lab-blocks { height: 20rem; border-radius: var(--cl-radius); overflow: hidden; border: 3px solid var(--cl-accent); background: #fffbeb; }
.circuit-lab-lock {
  position: absolute; inset: 0; z-index: 2; display: grid; place-content: center; justify-items: center; gap: 0.3rem;
  text-align: center; padding: 1rem; background: rgba(15, 23, 42, 0.72); color: #fff; backdrop-filter: blur(3px);
}
.circuit-lab-lock[hidden] { display: none; }
.circuit-lab-lock span { font-size: 3rem; animation: cl-float 1.8s ease-in-out infinite; }
.circuit-lab-lock p { max-width: 22rem; margin: 0; color: #e2e8f0; }
.circuit-lab-tip { margin: 0; font-size: 0.9rem; color: var(--cl-muted); }
.circuit-lab-error { margin: 1rem; color: var(--cl-bad); font-weight: 700; }

.circuit-lab-complete {
  display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; padding: 1rem 1.2rem; border-radius: var(--cl-radius);
  background: linear-gradient(120deg, #fde68a, #fbbf24 55%, #f59e0b); color: #1c1917; box-shadow: 0 16px 36px rgba(245, 158, 11, 0.35);
  animation: cl-pop 500ms ease;
}
.circuit-lab-complete[hidden] { display: none; }
.circuit-lab-complete > div { flex: 1 1 16rem; }
.circuit-lab-complete p { margin: 0.2rem 0 0; }
.circuit-lab-complete-icon { font-size: 2.6rem; animation: cl-float 2s ease-in-out infinite; }
.circuit-lab-credit { margin: 0; font-size: 0.75rem; color: #94a3b8; }
.circuit-lab-credit a { color: inherit; }

.circuit-lab-burst { position: absolute; left: 50%; top: 60%; z-index: 3; pointer-events: none; }
.circuit-lab-spark { position: absolute; font-size: 1.6rem; animation: cl-spark 1400ms cubic-bezier(0.16, 0.8, 0.3, 1) both; }

@keyframes cl-spark {
  0% { transform: translate(0, 0) scale(0.4) rotate(0); opacity: 1; }
  70% { opacity: 1; }
  100% { transform: translate(var(--x), var(--y)) scale(1.2) rotate(var(--r)); opacity: 0; }
}
@keyframes cl-rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes cl-pop { 0% { transform: scale(0.96); } 60% { transform: scale(1.03); } 100% { transform: scale(1); } }
@keyframes cl-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
@media (prefers-reduced-motion: reduce) {
  .circuit-lab *, .circuit-lab *::before { animation: none !important; transition: none !important; }
}
.circuit-lab-switch[aria-pressed="true"] { background: #dcfce7; border-color: #16a34a; color: #14532d; }
.circuit-lab-switch { touch-action: none; user-select: none; }