/* La lección tiene su propia fila; nunca cubre la escena ni sus controles. */
#lesson-dock[hidden],
#lesson-sky[hidden],
#lesson-notice[hidden] {
  display: none !important;
}

#lesson-viewport-host[hidden] {
  display: none !important;
}

#lesson-viewport-host {
  min-width: 0;
  padding: 12px;
  scroll-margin-top: 12px;
}

#lesson-viewport-host #lesson-dock .tour-step-actions button.tour-next {
  min-width: 190px;
  min-height: 56px;
  padding: 14px 25px;
  font-size: 17px;
}

@media (max-width: 600px) {
  #lesson-viewport-host { padding: 8px; }
  #lesson-viewport-host #lesson-dock .tour-step-actions button.tour-next {
    min-width: 0;
    min-height: 56px;
    padding: 12px 10px;
  }
}

.lesson-dock {
  min-width: 0;
  margin: 0 0 12px;
  scroll-margin-top: 12px;
}

#lesson-dock .tour-content {
  box-sizing: border-box;
  min-width: 0;
  margin: 0;
  padding: 14px 18px;
  border: 1px solid #8576b0;
  border-left: 4px solid #b49add;
  border-radius: 14px;
  background: linear-gradient(115deg, #2b2644, #172a43);
  color: #f2f5ff;
}

#lesson-dock .tour-step-header {
  align-items: baseline;
  gap: 5px 18px;
}

#lesson-dock .tour-step-header h3 {
  margin: 0;
  color: #f0e8ff;
  font-size: 18px;
  line-height: 1.35;
}

#lesson-dock .tour-progress {
  margin: 0;
  color: #d9c8fc;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

#lesson-dock .tour-explanation {
  margin: 8px 0 11px;
  max-width: none;
  color: #e9eef9;
  font-size: 14px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

/* Viñetas numeradas: cada una permite repetir directamente una parte. */
#lesson-dock .tour-step-navigation {
  margin: 9px 0 0;
}

#lesson-dock .tour-step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 7px;
  padding: 0;
  margin: 0;
  list-style: none;
}

#lesson-dock .tour-step-list li {
  min-width: 0;
}

#lesson-dock .tour-step-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  box-sizing: border-box;
  width: 100%;
  min-height: 44px;
  height: 100%;
  padding: 7px 10px;
  border: 1px solid #596d90;
  border-radius: 9px;
  background: #1b2b45;
  color: #dce7f8;
  font: inherit;
  font-size: 12px;
  line-height: 1.3;
  text-align: left;
  cursor: pointer;
}

#lesson-dock .tour-step-chip:hover:not(:disabled) {
  background: #304568;
  border-color: #afc7ed;
}

#lesson-dock .tour-step-chip:focus-visible {
  outline: 3px solid #fff2c6;
  outline-offset: 2px;
}

#lesson-dock .tour-step-chip[aria-current='step'] {
  border-color: #d4b8ff;
  background: #4c3d6b;
  color: #fff;
  opacity: 1;
}

#lesson-dock .tour-step-chip[data-pending='true'] {
  border-style: dashed;
  border-color: #f6cd72;
  opacity: 1;
}

#lesson-dock .tour-step-chip:disabled {
  cursor: default;
}

#lesson-dock .tour-step-number {
  display: grid;
  place-items: center;
  flex: 0 0 23px;
  height: 23px;
  border-radius: 50%;
  background: #344765;
  color: #ecf3ff;
  font-weight: 750;
  font-variant-numeric: tabular-nums;
}

#lesson-dock [aria-current='step'] .tour-step-number {
  background: #dec6ff;
  color: #342144;
}

#lesson-dock .tour-step-label {
  min-width: 0;
  overflow-wrap: anywhere;
}

#lesson-dock .tour-step-footer {
  align-items: center;
  gap: 8px 18px;
}

#lesson-dock .tour-step-actions {
  align-items: center;
  gap: 8px;
  margin: 0;
}

#lesson-dock .tour-step-actions button {
  box-sizing: border-box;
  min-height: 44px;
  padding: 10px 14px;
  border: 1px solid #7383a7;
  border-radius: 9px;
  background: #223653;
  color: #f1f5ff;
  font: inherit;
  font-size: 13px;
  line-height: 1.3;
  cursor: pointer;
}

#lesson-dock .tour-step-actions button:hover:not(:disabled) {
  border-color: #b5c8ef;
  background: #324a6b;
}

/* Un siguiente paso reconocible, sin destellos ni movimiento. */
#lesson-dock .tour-step-actions button.tour-next {
  min-width: 142px;
  min-height: 46px;
  padding: 10px 20px;
  border: 2px solid #ffe3a0;
  background: #f6cd72;
  color: #241c0d;
  font-size: 15px;
  font-weight: 750;
  box-shadow: 0 2px 0 #8c682d;
}

#lesson-dock .tour-step-actions button.tour-next:hover:not(:disabled) {
  border-color: #fff1cd;
  background: #ffdf98;
  color: #241c0d;
}

#lesson-dock .tour-step-actions button:focus-visible,
#lesson-notice button:focus-visible {
  outline: 3px solid #fff2c6;
  outline-offset: 3px;
}

#lesson-dock .tour-step-actions button:disabled {
  opacity: 0.5;
  cursor: default;
  box-shadow: none;
}

#lesson-dock .tour-step-context {
  flex: 1 1 210px;
  margin: 0;
  color: #c4d2e8;
  font-size: 12px;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

#lesson-dock .experience-status {
  margin: 8px 0 0;
}

/* El cielo local es una ampliación opcional, debajo de la vista espacial. */
.lesson-sky {
  min-width: 0;
  margin: 12px 0 0;
  border: 1px solid #536681;
  border-radius: 12px;
  background: #142239;
  color: #e6edfa;
}

.lesson-sky > summary {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  box-sizing: border-box;
  padding: 10px 14px;
  border-radius: 11px;
  color: #dce9ff;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  list-style: none;
}

.lesson-sky > summary::-webkit-details-marker {
  display: none;
}

.lesson-sky > summary::before {
  content: '+';
  flex: 0 0 16px;
  color: #c5b4ef;
  font-size: 20px;
  font-weight: 500;
  line-height: 1;
  text-align: center;
}

.lesson-sky[open] > summary::before {
  content: '−';
}

.lesson-sky > summary:hover {
  background: #20334e;
}

.lesson-sky > summary:focus-visible {
  outline: 3px solid #bcd5ff;
  outline-offset: -3px;
}

.lesson-sky > summary small {
  margin-left: auto;
  color: #bdcbe1;
  font-size: 11px;
  font-weight: 400;
}

#lesson-sky-content {
  min-width: 0;
  padding: 0 12px 12px;
}

#lesson-sky #sky-section {
  min-width: 0;
  margin: 0;
  padding: 10px 0 0;
  border: 0;
  border-top: 1px solid #485a76;
  border-radius: 0;
  background: transparent;
}

#lesson-notice {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px;
  color: #dce5f6;
  font-size: 13px;
  line-height: 1.5;
}

#lesson-notice p {
  margin: 0;
}

#lesson-notice button {
  min-height: 44px;
  padding: 10px 13px;
  border: 1px solid #9b88c5;
  border-radius: 9px;
  background: #44375f;
  color: #f4eeff;
  font: inherit;
  cursor: pointer;
}

#lesson-notice button:hover {
  border-color: #c3afea;
  background: #574477;
}

/* Las filas de ayuda se acotan para reservar espacio real al visor inmersivo. */
#observatory-stage.is-immersive #lesson-dock {
  flex: 0 0 auto;
  max-height: 34vh;
  max-height: 34dvh;
  margin: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-gutter: stable;
}

#observatory-stage.is-immersive #lesson-dock .tour-content {
  padding: 10px max(14px, env(safe-area-inset-right)) 10px
    max(14px, env(safe-area-inset-left));
  border-top: 0;
  border-right: 0;
  border-radius: 0;
}

#observatory-stage.is-immersive #lesson-sky {
  flex: 0 0 auto;
  max-height: 25vh;
  max-height: 25dvh;
  margin: 0;
  border-right: 0;
  border-left: 0;
  border-radius: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
}

#observatory-stage.is-immersive #lesson-sky > summary {
  position: sticky;
  top: 0;
  z-index: 1;
  min-height: 40px;
  padding-top: 8px;
  padding-bottom: 8px;
  border-radius: 0;
  background: #142239;
}

#observatory-stage.is-immersive #lesson-sky-content {
  padding: 0 10px 10px;
}

#observatory-stage.is-immersive #lesson-sky #sky-section,
#observatory-stage.is-immersive #lesson-sky #sky-view,
#observatory-stage.is-immersive #lesson-sky .sky-layout {
  height: auto;
}

#observatory-stage.is-immersive #lesson-sky #sky-section {
  padding-top: 8px;
  overflow: visible;
}

#observatory-stage.is-immersive #lesson-sky .sky-panorama {
  height: 180px;
  min-height: 180px;
}

@media (max-width: 600px) {
  #lesson-dock .tour-content {
    padding: 12px;
  }

  #lesson-dock .tour-step-header {
    gap: 3px 12px;
  }

  #lesson-dock .tour-step-header h3 {
    font-size: 17px;
  }

  #lesson-dock .tour-step-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
  }

  #lesson-dock .tour-step-chip {
    gap: 7px;
    padding: 7px 8px;
  }

  #lesson-dock .tour-step-actions {
    display: grid;
    width: 100%;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  #lesson-dock .tour-step-actions button {
    width: 100%;
    min-width: 0;
    padding: 10px 8px;
  }

  #lesson-dock .tour-step-actions button.tour-next {
    min-width: 0;
    padding: 10px 8px;
  }

  #lesson-dock .tour-step-context {
    flex-basis: 100%;
  }

  .lesson-sky > summary {
    padding-right: 10px;
    padding-left: 10px;
  }

  #lesson-sky-content {
    padding-right: 8px;
    padding-left: 8px;
  }
}