/* Interacciones educativas (v12): cada efecto puede explicar el CSS que lo produce. */

/* Entrada inicial escalonada */
@keyframes intro-rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes intro-slide {
  from {
    opacity: 0;
    transform: translateX(-18px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes intro-scale {
  from {
    opacity: 0;
    transform: scale(0.94);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

html.intro-ready:not(.motion-paused) .brand {
  animation: intro-slide 520ms ease-out both;
}

html.intro-ready:not(.motion-paused) .chapter-nav a {
  animation: intro-rise 420ms ease-out both;
  animation-delay: calc(80ms + var(--intro-order, 0) * 35ms);
}

html.intro-ready:not(.motion-paused) .topbar {
  animation: intro-rise 500ms 120ms ease-out both;
}

html.intro-ready:not(.motion-paused) .hero-copy > * {
  animation: intro-rise 620ms ease-out both;
  animation-delay: var(--intro-delay, 180ms);
}

html.intro-ready:not(.motion-paused) .hero-art {
  animation: intro-scale 700ms 330ms ease-out both;
}

/* Menú superior */
.sidebar {
  position: relative;
}

.menu-guide {
  position: absolute;
  top: 17px;
  right: max(24px, calc((100% - 1100px) / 2));
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-raised);
  color: var(--muted);
  font-size: 11px;
}

.menu-guide > span {
  color: var(--accent-ink);
}

.chapter-nav a {
  position: relative;
  transition:
    color 180ms ease,
    background-color 180ms ease,
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.chapter-nav a::after {
  content: "";
  position: absolute;
  right: 10px;
  bottom: 3px;
  left: 10px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}

.chapter-nav a:hover,
.chapter-nav a:focus-visible {
  transform: translateY(-2px);
}

.chapter-nav a:hover::after,
.chapter-nav a:focus-visible::after,
.chapter-nav a.active::after {
  transform: scaleX(1);
}

.brand-symbol {
  display: inline-block;
  transition: transform 260ms ease;
}

.brand:hover .brand-symbol {
  transform: rotate(-8deg) scale(1.08);
}

/* Portada que responde a la posición del puntero */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.hero > :not(.hero-pointer-glow) {
  position: relative;
  z-index: 1;
}

.hero-pointer-glow {
  position: absolute;
  z-index: 0;
  top: var(--pointer-y, 45%);
  left: var(--pointer-x, 55%);
  width: min(560px, 68vw);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgb(var(--accent-rgb) / 0.42) 0,
    rgb(var(--accent-rgb) / 0.22) 28%,
    rgb(var(--accent-rgb) / 0.08) 52%,
    transparent 72%
  );
  box-shadow: 0 0 90px rgb(var(--accent-rgb) / 0.22);
  filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0.76);
  will-change: top, left, opacity, transform;
  transition:
    opacity 250ms ease,
    transform 350ms ease;
}

.hero.pointer-active .hero-pointer-glow {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.hero-art {
  transform-style: preserve-3d;
  transition: transform 180ms ease-out;
  transform: perspective(850px) rotateX(var(--tilt-x, 0deg))
    rotateY(var(--tilt-y, 0deg));
}

.css-sculpture {
  transform: translate(-50%, -50%) translateZ(30px);
}

.css-effect-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: fit-content;
  margin-top: 19px;
  padding: 7px 10px;
  border: 1px dashed rgb(var(--accent-rgb) / 0.55);
  border-radius: 6px;
  background: rgb(var(--accent-rgb) / 0.08);
  color: var(--accent-ink);
  font: 10.5px var(--mono);
  transition: background 0.2s ease, transform 0.2s ease;
}

.css-effect-chip:hover {
  background: rgb(var(--accent-rgb) / 0.16);
  transform: translateY(-1px);
}

.topic-strip span {
  transition:
    color 180ms ease,
    transform 180ms ease;
}

.topic-strip span:hover {
  color: var(--accent-ink);
  transform: translateY(-2px);
}

/* Preguntas cortas para usar la página durante una clase */
.quick-questions {
  padding: 38px 0 46px;
  border-bottom: 1px solid var(--line);
}

.quick-questions-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 16px;
}

.quick-questions-heading h2 {
  margin: 7px 0 0;
  font-size: clamp(25px, 3vw, 34px);
}

.quick-questions-heading > p {
  margin: 0;
  font-size: 13px;
}

.question-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.question-grid details {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  transition:
    border-color 180ms ease,
    transform 180ms ease,
    box-shadow 180ms ease;
}

.question-grid details:hover {
  border-color: var(--accent-ink);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgb(0 0 0 / 0.06);
}

.question-grid details[open] {
  border-color: rgb(var(--accent-rgb) / 0.55);
  box-shadow: 0 4px 14px rgb(0 0 0 / 0.08);
}

.question-grid summary {
  min-height: 76px;
  padding: 16px;
  color: var(--text);
  font-size: 13.5px;
  font-weight: 650;
  cursor: pointer;
}

.question-grid details[open] summary {
  min-height: 0;
  border-bottom: 1px solid var(--line);
}

.question-grid p {
  margin: 14px 14px 0;
  font-size: 12.5px;
  color: var(--muted);
}

.question-grid pre {
  margin: 12px 14px 14px;
  padding: 12px;
  font-size: 10px;
  line-height: 1.55;
  border-radius: 6px;
}

/* Inspector de CSS que revela la explicación al pasar el mouse */
.css-demo-target {
  cursor: pointer;
  transition: box-shadow 0.2s ease, outline-color 0.2s ease;
}

.css-demo-target:hover,
.css-demo-target:focus-visible {
  box-shadow: 0 0 0 2px rgb(var(--accent-rgb) / 0.45);
}

.css-inspector {
  position: fixed;
  z-index: 90;
  right: 20px;
  bottom: 20px;
  width: min(390px, calc(100vw - 40px));
  max-height: min(580px, calc(100vh - 40px));
  padding: 18px;
  overflow: auto;
  visibility: hidden;
  border: 1px solid rgb(var(--accent-rgb) / 0.5);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 16px 48px rgb(0 0 0 / 0.24);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(14px) scale(0.98);
  transition:
    opacity 200ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 200ms cubic-bezier(0.16, 1, 0.3, 1),
    visibility 200ms;
}

.css-inspector.is-visible {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.css-inspector-header,
.css-inspector-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.css-inspector-header {
  margin-bottom: 13px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.css-inspector-header > span {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--accent-ink);
  font: 10.5px var(--mono);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.css-inspector-header i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgb(var(--accent-rgb) / 0.7);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.3);
    opacity: 0.75;
  }
}

.css-inspector-header button {
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-raised);
  color: var(--text);
  font-size: 19px;
  line-height: 1;
  cursor: pointer;
  transition: all 0.18s ease;
}

.css-inspector-header button:hover {
  background: var(--line);
  transform: scale(1.08);
}

.css-inspector > strong {
  display: block;
  font-size: 18px;
  line-height: 1.25;
  font-weight: 700;
}

.css-inspector > p {
  margin: 7px 0 11px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted);
}

.css-inspector pre {
  max-height: 180px;
  margin: 0 0 11px;
  padding: 12px;
  font-size: 10px;
  line-height: 1.55;
  border-radius: 6px;
}

.css-inspector-footer button {
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-raised);
  color: var(--text);
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.18s ease;
}

.css-inspector-footer button:hover {
  background: var(--line);
  border-color: rgb(var(--accent-rgb) / 0.5);
  transform: translateY(-1px);
}

.css-inspector-footer span {
  color: var(--muted);
  font-size: 10.5px;
}

@media (max-width: 1000px) {
  .menu-guide {
    display: none;
  }

  .question-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .question-grid summary {
    min-height: 0;
  }
}

@media (max-width: 600px) {
  .hero-pointer-glow {
    width: 360px;
  }

  .css-effect-chip {
    line-height: 1.5;
    text-align: left;
  }

  .quick-questions-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }

  .css-inspector {
    right: 12px;
    left: 12px;
    bottom: 12px;
    width: auto;
    max-height: 52vh;
    border-radius: 12px;
  }
}

html.motion-paused .hero-pointer-glow,
html.motion-paused .hero-art,
html.motion-paused .chapter-nav a,
html.motion-paused .chapter-nav a::after,
html.motion-paused .brand-symbol,
html.motion-paused .topic-strip span,
html.motion-paused .question-grid details,
html.motion-paused .css-inspector,
html.motion-paused .css-demo-target {
  animation: none !important;
  transition: none !important;
}

@media (prefers-reduced-motion: reduce) {
  .hero-pointer-glow,
  .hero-art,
  .chapter-nav a,
  .chapter-nav a::after,
  .brand-symbol,
  .topic-strip span,
  .question-grid details,
  .css-inspector,
  .css-demo-target {
    animation: none !important;
    transition: none !important;
  }
}