/* ============================================================
   hto-licensing — BASE LIGHT — css/light/base-light.css
   Base del formato blanco (marca HTO, estética Acelerador).
   Origen: resource-light.css de hto-recursos (probado en los
   13 recursos). Tokens + fondos + chrome + componentes comunes.
   Las páginas optan por light cambiando sus <link> — el resto
   del portal sigue dark hasta su migración.
============================================================ */

:root {
  --bg:           #ffffff;
  --bg-soft:      #f8f6f1;
  --border:       #e6e8eb;
  --border-hover: #d0d5da;
  --text:         #0f172a;
  --text-sec:     #475569;
  --text-muted:   #94a3b8;
  --accent:       #6dd684;
  --accent-dark:  #48cb64;
  --accent-soft:  #bfedc9;
  --accent-tint:  #ebf9ee;
  --accent-text:  #15a34a;
  --gold:         #b45309;
  --font:         'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono:    'Geist Mono', 'SF Mono', Consolas, monospace;
  --ease-out:     cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-feature-settings: "ss01", "cv11", "tnum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection { background: rgba(109, 214, 132, 0.25); color: var(--text); }

/* ── Fondos: grid + auroras + grano (mismo sistema que portal.css) ── */
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(109, 214, 132, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(109, 214, 132, 0.5) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 95% 75% at center, black 0%, rgba(0,0,0,0.7) 50%, transparent 100%);
          mask-image: radial-gradient(ellipse 95% 75% at center, black 0%, rgba(0,0,0,0.7) 50%, transparent 100%);
  animation: grid-pulse 8s ease-in-out infinite;
  will-change: opacity;
}
@keyframes grid-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.55; } }

.ambient-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  background: radial-gradient(ellipse 60% 40% at 50% 0%, rgba(109, 214, 132, 0.05), transparent 65%);
}
/* Auroras sin filter:blur (coste GPU): el difuminado va en los stops */
.ambient-bg::before,
.ambient-bg::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  will-change: transform, opacity;
  pointer-events: none;
}
.ambient-bg::before {
  width: 620px; height: 620px;
  left: -10%; top: -8%;
  background: radial-gradient(circle, rgba(109, 214, 132, 0.20) 0%, rgba(109, 214, 132, 0.08) 35%, rgba(109, 214, 132, 0.03) 55%, transparent 68%);
  animation: aurora-a 28s ease-in-out infinite;
}
.ambient-bg::after {
  width: 540px; height: 540px;
  right: -6%; top: 22%;
  background: radial-gradient(circle, rgba(72, 203, 100, 0.16) 0%, rgba(72, 203, 100, 0.07) 35%, rgba(109, 214, 132, 0.03) 55%, transparent 68%);
  animation: aurora-b 34s ease-in-out infinite;
}
@media (max-width: 640px) {
  .ambient-bg::before { width: 440px; height: 440px; }
  .ambient-bg::after { width: 400px; height: 400px; }
}
@keyframes aurora-a {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.75; }
  33%      { transform: translate(80px, 60px) scale(1.08); opacity: 0.95; }
  66%      { transform: translate(-40px, 120px) scale(0.95); opacity: 0.65; }
}
@keyframes aurora-b {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.7; }
  40%      { transform: translate(-100px, 90px) scale(1.12); opacity: 0.95; }
  75%      { transform: translate(60px, -50px) scale(0.92); opacity: 0.6; }
}
.noise-bg {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}

/* ── Header ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 28px;
}
.header-inner {
  max-width: 1080px;
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.header-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}
.header-brand .logo-mark { height: 15px; width: auto; display: block; }
.header-brand .logo-text { height: 17px; width: auto; display: block; }
.header-badge {
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent-text);
  background: var(--accent-tint);
  border: 1px solid var(--accent-soft);
  border-radius: 999px;
  padding: 3px 10px;
}
/* Back link: la flecha SOLO vía ::before (gotcha nav-back — no poner ← literal) */
.back-link {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-sec);
  text-decoration: none;
  transition: color .2s ease;
}
.back-link::before {
  content: '←';
  font-size: 1rem;
  transition: transform .2s ease;
}
.back-link:hover { color: var(--accent-text); }
.back-link:hover::before { transform: translateX(-3px); }

.lang-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  gap: 2px;
}
.lang-btn {
  font-family: var(--font-mono);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--text-muted);
  background: transparent;
  border: none;
  border-radius: 999px;
  padding: 5px 11px;
  cursor: pointer;
  transition: all .2s ease;
}
.lang-btn.active {
  background: var(--accent-text);
  color: #ffffff;
}

/* User chip (auth.js lo inyecta con estilos inline dark — override light) */
#htoUserChip > span { color: var(--text-sec) !important; }
#htoUserChip #htoLogoutBtn {
  background: #ffffff !important;
  border: 1px solid var(--border) !important;
  color: var(--text-muted) !important;
}
#htoUserChip #htoLogoutBtn:hover {
  border-color: var(--accent-soft) !important;
  color: var(--accent-text) !important;
}

/* ── Layout ── */
.page-body {
  position: relative;
  z-index: 10;
  padding: 56px 0 80px;
}
.container {
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ── Hero ── */
.overview-hero { margin-bottom: 2.2rem; }
.overview-hero-card {
  position: relative;
  background: #ffffff;
  border: 1px solid transparent;
  border-radius: 20px;
  padding: 44px 46px;
  background:
    linear-gradient(#ffffff, #ffffff) padding-box,
    linear-gradient(150deg, rgba(72, 203, 100, 0.55), rgba(109, 214, 132, 0.18) 40%, var(--border) 100%) border-box;
  box-shadow: 0 8px 34px rgba(15, 23, 42, 0.07);
  overflow: hidden;
}
.overview-hero-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 70% 50% at 12% 0%, rgba(109, 214, 132, 0.12), transparent 60%);
}
.hero-badges {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  position: relative;
}
.badge-modulo, .badge-leccion, .badge-categoria {
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 5px 12px;
}
.badge-modulo {
  color: #ffffff;
  background: linear-gradient(180deg, #3ed47a 0%, #16a34a 70%);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.3), 0 2px 8px rgba(22, 163, 74, 0.25);
}
.badge-leccion {
  color: var(--accent-text);
  background: var(--accent-tint);
  border: 1px solid var(--accent-soft);
}
.badge-categoria {
  color: var(--text-sec);
  background: var(--bg-soft);
  border: 1px solid var(--border);
}
.overview-hero-card h1 {
  position: relative;
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -.03em;
  color: var(--text);
  margin-bottom: 1.1rem;
}
.lesson-sub {
  position: relative;
  font-size: .98rem;
  line-height: 1.7;
  color: var(--text-sec);
  letter-spacing: -.003em;
}

/* ── Fact strip ── */
.fact-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 0 0 3rem;
}
.fact-card {
  padding: 20px 22px;
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}
.fact-val {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent-text);
  letter-spacing: -.02em;
  margin-bottom: 6px;
}
.fact-lbl {
  font-size: .78rem;
  color: var(--text-sec);
  line-height: 1.55;
}

/* ── Secciones ── */
.lesson-sec { margin: 0 0 3.4rem; }
.sec-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: 12px;
}
.sec-label::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent-dark);
  box-shadow: 0 0 0 3px var(--accent-tint);
}
.sec-title {
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.025em;
  color: var(--text);
  margin-bottom: 1rem;
}
.lesson-sec > p {
  font-size: .94rem;
  line-height: 1.7;
  color: var(--text-sec);
  margin-bottom: .9rem;
}
.lesson-sec h3 {
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--text);
  margin: 2rem 0 .4rem;
}

/* ── Callout ── */
.callout {
  position: relative;
  margin: 1.6rem 0;
  padding: 18px 22px;
  border-radius: 14px;
  background: var(--accent-tint);
  border: 1px solid var(--accent-soft);
}
.callout-label {
  display: block;
  font-family: var(--font-mono);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: 8px;
}
.callout p {
  font-size: .88rem;
  line-height: 1.65;
  color: #14532d;
  margin: 0;
}

/* ── Reels vs Stories ── */
.vs-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 1.8rem 0;
}
.vs-card {
  padding: 22px 24px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #ffffff;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}
.vs-card:nth-child(1) { border-top: 3px solid #0e7490; }
.vs-card:nth-child(2) { border-top: 3px solid var(--accent-dark); }
.vs-tag {
  font-family: var(--font-mono);
  font-size: .6rem; font-weight: 800;
  letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 10px;
}
.vs-card:nth-child(1) .vs-tag { color: #0e7490; }
.vs-card:nth-child(2) .vs-tag { color: var(--accent-text); }
.vs-title { font-size: .95rem; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.vs-list { list-style: none; padding: 0; margin: 0; }
.vs-list li {
  font-size: .82rem; color: var(--text-sec);
  line-height: 1.6; padding: 4px 0 4px 16px; position: relative;
}
.vs-list li::before { content: '→'; position: absolute; left: 0; color: var(--text-muted); }

/* ── Anatomía ── */
.anat-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 1.8rem 0;
}
.anat-card {
  padding: 20px 18px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #ffffff;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
}
.anat-card:nth-child(1) { border-top: 3px solid var(--accent-dark); }
.anat-card:nth-child(2) { border-top: 3px solid #0e7490; }
.anat-card:nth-child(3) { border-top: 3px solid #7c3aed; }
.anat-tag {
  font-family: var(--font-mono);
  font-size: .58rem; font-weight: 800;
  letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 10px;
}
.anat-card:nth-child(1) .anat-tag { color: var(--accent-text); }
.anat-card:nth-child(2) .anat-tag { color: #0e7490; }
.anat-card:nth-child(3) .anat-tag { color: #7c3aed; }
.anat-title { font-size: .92rem; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.anat-desc { font-size: .78rem; color: var(--text-sec); line-height: 1.55; }

/* ── Stickers ── */
.stk-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 1.6rem 0;
}
.stk-chip {
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #ffffff;
}
.stk-name { font-size: .84rem; font-weight: 700; color: var(--text); margin-bottom: 3px; }
.stk-use { font-size: .74rem; color: var(--text-sec); line-height: 1.5; margin-bottom: 6px; }
.stk-fric {
  font-family: var(--font-mono);
  font-size: .62rem; letter-spacing: 1px; text-transform: uppercase;
  font-weight: 700;
}
.stk-fric.low { color: var(--accent-text); }
.stk-fric.mid { color: var(--gold); }
.stk-fric.high { color: #dc2626; }

/* ── Secuencias ── */
.seq-card {
  border: 1px solid var(--border);
  border-left: 3px solid var(--sq-c, var(--accent-dark));
  border-radius: 16px;
  background: #ffffff;
  box-shadow: 0 2px 14px rgba(15, 23, 42, 0.05);
  padding: 24px 26px;
  margin-bottom: 18px;
}
.seq-head { display: flex; align-items: flex-start; gap: 16px; }
.seq-num {
  font-family: var(--font-mono);
  font-size: 1.25rem; font-weight: 800;
  color: var(--sq-c); line-height: 1.3; flex-shrink: 0;
}
.seq-meta { flex: 1; }
.seq-title { font-size: 1.04rem; font-weight: 700; color: var(--text); margin-bottom: 7px; }
.seq-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.seq-tag {
  font-family: var(--font-mono);
  font-size: .58rem; font-weight: 700;
  letter-spacing: 1.5px; text-transform: uppercase;
  padding: 4px 9px; border-radius: 20px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--bg-soft);
}
.seq-tag.is-fase { color: var(--sq-c); background: #ffffff; border-color: var(--border-hover); }
.seq-copy { flex-shrink: 0; }
.seq-when { font-size: .84rem; color: var(--text-sec); line-height: 1.6; margin: 12px 0 14px; }
.seq-frames { margin: 0 0 14px; }
.seq-frame {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 14px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--border);
}
.seq-frame:last-child { border-bottom: none; }
.sf-n {
  width: 28px; height: 28px; border-radius: 8px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  color: var(--sq-c);
  font-family: var(--font-mono);
  font-size: .72rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.sf-role {
  font-family: var(--font-mono);
  font-size: .62rem; font-weight: 800;
  letter-spacing: 1.6px; text-transform: uppercase;
  color: var(--sq-c); margin-bottom: 4px;
}
.sf-txt { font-size: .88rem; color: var(--text); line-height: 1.55; margin-bottom: 4px; }
.sf-note { font-size: .76rem; color: var(--text-muted); line-height: 1.5; font-style: italic; }
.seq-rule {
  padding: 12px 16px;
  background: var(--bg-soft);
  border-left: 3px solid var(--sq-c);
  border-radius: 0 10px 10px 0;
  font-size: .8rem; color: var(--text-sec); line-height: 1.6;
}

/* ── Reglas de cadencia ── */
.rule-list { margin: 1.6rem 0; }
.rule-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.rule-item:last-child { border-bottom: none; }
.rule-n {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: .95rem; font-weight: 800; color: var(--accent-text);
  width: 30px; padding-top: 2px;
}
.rule-body h4 { font-size: .95rem; font-weight: 700; color: var(--text); margin: 0 0 5px; }
.rule-body p { font-size: .84rem; color: var(--text-sec); line-height: 1.6; margin: 0; }

/* ── Prompt ── */
.prompt-section {
  margin: 1.8rem 0;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #ffffff;
  box-shadow: 0 2px 14px rgba(15, 23, 42, 0.05);
  overflow: hidden;
}
.prompt-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
.prompt-label {
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-sec);
}
.prompt-copy-btn {
  font-family: var(--font-mono);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent-text);
  background: var(--accent-tint);
  border: 1px solid var(--accent-soft);
  border-radius: 999px;
  padding: 7px 14px;
  cursor: pointer;
  transition: all .2s ease;
  white-space: nowrap;
}
.prompt-copy-btn:hover { background: var(--accent-soft); }
.prompt-body {
  padding: 20px 22px;
  font-family: var(--font-mono);
  font-size: .78rem;
  line-height: 1.7;
  color: var(--text-sec);
  white-space: pre-wrap;
  word-break: break-word;
}
.prompt-body.scrollable { max-height: 460px; overflow-y: auto; }

/* ── Related box ── */
.related-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 2rem 0 0;
  padding: 20px 24px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: #ffffff;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
  text-decoration: none;
  transition: border-color .2s ease, box-shadow .25s ease, transform .2s ease;
}
.related-box:hover {
  border-color: var(--accent-soft);
  box-shadow: 0 8px 24px rgba(22, 163, 74, 0.12);
  transform: translateY(-2px);
}
.related-kicker {
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--accent-text);
  margin-bottom: 6px;
}
.related-title {
  font-size: .92rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}
.related-box svg {
  flex-shrink: 0;
  width: 20px; height: 20px;
  fill: none;
  stroke: var(--accent-text);
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ── CTA cierre ── */
.cta-close {
  position: relative;
  margin: 3rem 0 0;
  padding: 44px 40px;
  border-radius: 20px;
  text-align: center;
  border: 1px solid transparent;
  background:
    linear-gradient(#ffffff, #ffffff) padding-box,
    linear-gradient(150deg, rgba(72, 203, 100, 0.55), rgba(109, 214, 132, 0.18) 40%, var(--border) 100%) border-box;
  box-shadow: 0 8px 34px rgba(15, 23, 42, 0.07);
  overflow: hidden;
}
.cta-close::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 70% 60% at 50% 0%, rgba(109, 214, 132, 0.12), transparent 65%);
}
.cta-close h3 {
  position: relative;
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--text);
  margin-bottom: .9rem;
}
.cta-close p {
  position: relative;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--text-sec);
  max-width: 560px;
  margin: 0 auto 1.6rem;
}
.cta-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 26px;
  height: 48px;
  background: linear-gradient(180deg, #3ed47a 0%, #16a34a 60%, #0e7a3a 100%);
  border: none;
  border-radius: 12px;
  color: #ffffff;
  font-family: var(--font);
  font-size: .92rem;
  font-weight: 700;
  text-decoration: none;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.32),
    0 4px 14px rgba(22, 163, 74, 0.30);
  transition: transform .2s ease-out, box-shadow .2s ease-out, filter .2s ease-out;
}
.cta-btn:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.36), 0 7px 20px rgba(22, 163, 74, 0.38);
}
.cta-btn:active { transform: translateY(0); }
.cta-btn svg {
  width: 16px; height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ── Footer ── */
.footer {
  position: relative;
  z-index: 10;
  border-top: 1px solid var(--border);
  padding: 28px;
  text-align: center;
}
.footer-inner {
  font-size: .78rem;
  color: var(--text-muted);
}

/* ── Enhancements (scroll progress + back to top + reveals) ── */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  z-index: 100;
  width: 0;
  background: linear-gradient(90deg, var(--accent-dark), var(--accent));
  box-shadow: 0 0 8px rgba(72, 203, 100, 0.4);
}
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #ffffff;
  border: 1px solid var(--border);
  color: var(--accent-text);
  font-size: 1rem;
  cursor: pointer;
  z-index: 90;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: all .25s ease;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.10);
}
.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.back-to-top:hover {
  border-color: var(--accent-soft);
  box-shadow: 0 6px 20px rgba(22, 163, 74, 0.18);
}
.animate-on-scroll {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}
.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  .animate-on-scroll { opacity: 1; transform: none; transition: none; }
  .grid-bg, .ambient-bg::before, .ambient-bg::after { animation: none; }
}

/* ── Responsive ── */
@media (max-width: 860px) {
  .vs-grid, .anat-grid { grid-template-columns: 1fr; }
  .stk-grid { grid-template-columns: 1fr 1fr; }
  .fact-strip { grid-template-columns: 1fr; }
  .seq-head { flex-wrap: wrap; }
  .overview-hero-card { padding: 32px 26px; }
}
@media (max-width: 640px) {
  #htoUserChip > span { display: none !important; }
  #htoUserChip { margin-right: 0 !important; }
  .header-inner { gap: 10px; }
  .header-brand .logo-text { display: none; }
}
@media (max-width: 560px) {
  .stk-grid { grid-template-columns: 1fr; }
  .seq-card { padding: 20px 18px; }
  .container { padding: 0 20px; }
  .site-header { padding: 0 20px; }
  .header-badge { display: none; }
  .cta-close { padding: 34px 24px; }
}

/* ════════════════════════════════════════════════════════════
   COMPONENTES COMPARTIDOS (port light de resource-shared.css
   y lesson-premium.css) — añadidos para la migración de los
   12 recursos dark (2026-07-16)
════════════════════════════════════════════════════════════ */

/* ── Agent download ── */
.agent-download {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid transparent;
  background:
    linear-gradient(#ffffff, #ffffff) padding-box,
    linear-gradient(150deg, rgba(72, 203, 100, 0.55), rgba(109, 214, 132, 0.18) 40%, var(--border) 100%) border-box;
  box-shadow: 0 8px 34px rgba(15, 23, 42, 0.07);
  margin: 32px 0;
}
.ad-header {
  position: relative;
  background: linear-gradient(180deg, var(--accent-tint), #ffffff);
  padding: 36px 36px 28px;
  border-bottom: 1px solid var(--border);
}
.ad-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 800;
  color: var(--accent-text);
  background: #ffffff;
  border: 1px solid var(--accent-soft);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.ad-title { font-size: 28px; font-weight: 800; letter-spacing: -.02em; color: var(--text); margin: 0 0 10px; }
.ad-sub { font-size: 15px; color: var(--text-sec); line-height: 1.6; margin: 0; }
.ad-body { padding: 32px 36px; background: #ffffff; }
.ad-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin: 0 0 28px; }
.ad-step { text-align: center; }
.ad-step-num {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--accent-tint);
  border: 1px solid var(--accent-soft);
  color: var(--accent-text);
  font-weight: 900;
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 12px;
}
.ad-step-title { font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 6px; }
.ad-step-desc { font-size: 13px; color: var(--text-sec); line-height: 1.6; }
.file-chip {
  display: flex;
  align-items: center;
  gap: 14px;
  max-width: 420px;
  margin: 0 auto 20px;
  padding: 14px 18px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
}
.file-chip-icon {
  flex-shrink: 0;
  width: 40px; height: 40px;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent-tint);
  border: 1px solid var(--accent-soft);
}
.file-chip-icon svg { width: 19px; height: 19px; fill: none; stroke: var(--accent-text); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.file-chip-name { font-family: var(--font-mono); font-size: .82rem; font-weight: 700; color: var(--text); word-break: break-all; }
.file-chip-meta { font-family: var(--font-mono); font-size: .66rem; color: var(--text-muted); margin-top: 3px; letter-spacing: .4px; }
.ad-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.ad-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(180deg, #3ed47a 0%, #16a34a 60%, #0e7a3a 100%);
  color: #ffffff;
  font-family: var(--font);
  font-weight: 800;
  font-size: 15px;
  padding: 16px 32px;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  letter-spacing: 0.3px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.32), 0 4px 14px rgba(22, 163, 74, 0.30);
}
.ad-download-btn:hover { transform: translateY(-2px); filter: brightness(1.06); box-shadow: inset 0 1px 0 rgba(255,255,255,.36), 0 8px 24px rgba(22, 163, 74, 0.35); }
.ad-download-btn svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.ad-download-btn.ghost {
  background: #ffffff;
  border: 1px solid var(--accent-soft);
  color: var(--accent-text);
  box-shadow: none;
}
.ad-download-btn.ghost:hover { background: var(--accent-tint); box-shadow: none; }

/* ── Reason grid (rotación de color light) ── */
.reason-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; margin: 2rem 0; counter-reset: rc; }
.reason-card {
  position: relative;
  padding: 26px 28px 24px;
  border-radius: 16px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-top: 3px solid currentColor;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
  overflow: hidden;
  transition: transform .3s, box-shadow .35s;
  display: flex; flex-direction: column; gap: 10px;
  counter-increment: rc;
}
.reason-card:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(15, 23, 42, 0.10); }
.reason-card:nth-child(4n+1) { color: #15a34a; }
.reason-card:nth-child(4n+2) { color: #0e7490; }
.reason-card:nth-child(4n+3) { color: #7c3aed; }
.reason-card:nth-child(4n)   { color: #c2410c; }
.reason-grid.rg-6 .reason-card:nth-child(6n+1), .reason-grid.rg-3 .reason-card:nth-child(6n+1) { color: #15a34a; }
.reason-grid.rg-6 .reason-card:nth-child(6n+2), .reason-grid.rg-3 .reason-card:nth-child(6n+2) { color: #0e7490; }
.reason-grid.rg-6 .reason-card:nth-child(6n+3), .reason-grid.rg-3 .reason-card:nth-child(6n+3) { color: #7c3aed; }
.reason-grid.rg-6 .reason-card:nth-child(6n+4), .reason-grid.rg-3 .reason-card:nth-child(6n+4) { color: #c2410c; }
.reason-grid.rg-6 .reason-card:nth-child(6n+5), .reason-grid.rg-3 .reason-card:nth-child(6n+5) { color: #4d7c0f; }
.reason-grid.rg-6 .reason-card:nth-child(6n),   .reason-grid.rg-3 .reason-card:nth-child(6n)   { color: #b45309; }
.reason-grid.rg-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.reason-num {
  font-family: var(--font-mono);
  font-size: .64rem; font-weight: 800;
  letter-spacing: 2.4px;
  color: currentColor;
  display: inline-flex; align-items: center; gap: 8px;
}
.reason-num::before { content: counter(rc, decimal-leading-zero); }
.reason-num::after { content: ''; width: 22px; height: 1px; background: currentColor; opacity: .45; }
.reason-title { font-size: 1.05rem; font-weight: 700; color: var(--text); line-height: 1.35; letter-spacing: -.2px; margin: 0; }
.reason-desc { font-size: .88rem; color: var(--text-sec); line-height: 1.6; margin: 0; }

/* ── Mini-flow ── */
.mini-flow { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; margin: 2rem 0; align-items: stretch; }
.mini-flow.mf-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.mini-flow.mf-5 { grid-template-columns: repeat(5, minmax(0,1fr)); }
.mf-step {
  position: relative;
  padding: 22px 22px 20px;
  border-radius: 14px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-top: 3px solid currentColor;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.04);
  transition: transform .3s, box-shadow .35s;
  display: flex; flex-direction: column; gap: 8px;
}
.mf-step:hover { transform: translateY(-3px); box-shadow: 0 8px 22px rgba(15, 23, 42, 0.10); }
.mf-step:nth-child(4n+1) { color: #15a34a; }
.mf-step:nth-child(4n+2) { color: #0e7490; }
.mf-step:nth-child(4n+3) { color: #7c3aed; }
.mf-step:nth-child(4n)   { color: #c2410c; }
.mf-num { font-family: var(--font-mono); font-size: .6rem; font-weight: 800; letter-spacing: 2.4px; color: currentColor; }
.mf-title { font-size: .95rem; font-weight: 700; color: var(--text); letter-spacing: -.2px; line-height: 1.35; margin: 0; }
.mf-desc { font-size: .8rem; color: var(--text-sec); line-height: 1.55; margin: 0; }

/* ── Callout variantes ── */
.callout.gold     { background: #fdf6ec; border-color: #f2ddba; }
.callout.gold .callout-label { color: var(--gold); }
.callout.gold p   { color: #713f12; }
.callout.warning  { background: #fdf1f1; border-color: #f5cfcf; }
.callout.warning .callout-label { color: #dc2626; }
.callout.warning p { color: #7f1d1d; }
.callout.critical { background: #fdf1f1; border-color: #dc2626; }
.callout.critical .callout-label { color: #dc2626; }
.callout.critical p { color: #7f1d1d; }
.callout.rule     { background: #fdf3ec; border-color: #f4d5be; }
.callout.rule .callout-label { color: #c2410c; }
.callout.rule p   { color: #7c2d12; }
.callout.insight  { background: var(--accent-tint); border-color: var(--accent-soft); }
.callout.insight .callout-label { color: var(--accent-text); }
.callout.insight p { color: #14532d; }

/* ── Utilidades de color (texto/celdas) ── */
.gold { color: var(--gold); }
.cyan { color: #0e7490; }
tbody td.cyan { color: #0e7490; font-weight: 600; }
tbody td.gold { color: var(--gold); font-weight: 600; }

/* ── Tablas base light ── */
table { width: 100%; border-collapse: collapse; margin: 1.4rem 0; font-size: .85rem; }
thead th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: .64rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 10px 14px;
  border-bottom: 2px solid var(--border);
}
tbody td { padding: 11px 14px; border-bottom: 1px solid var(--border); color: var(--text-sec); line-height: 1.5; }
tbody tr:last-child td { border-bottom: none; }
tbody td:first-child { color: var(--text); font-weight: 600; }

/* ── Responsive de componentes compartidos ── */
@media (max-width: 860px) {
  .reason-grid, .reason-grid.rg-3 { grid-template-columns: 1fr; }
  .mini-flow, .mini-flow.mf-3, .mini-flow.mf-5 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .ad-steps { grid-template-columns: 1fr; }
  .ad-header { padding: 28px 24px 22px; }
  .ad-body { padding: 24px 22px; }
}
@media (max-width: 560px) {
  .mini-flow, .mini-flow.mf-3, .mini-flow.mf-5 { grid-template-columns: 1fr; }
  .reason-card { padding: 22px 22px 20px; }
}

/* ── Nav legacy de lecciones (portal-shell.js lo sustituye por el sidebar) ── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  padding: 0 28px;
}
.nav-inner {
  max-width: 1100px; margin: 0 auto; height: 64px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.nav-logo img { height: 26px; width: auto; display: block; }
.nav-right { display: flex; align-items: center; gap: 14px; }
.nav-back {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--font-mono); font-size: .72rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--text-sec); text-decoration: none; transition: color .2s ease;
}
.nav-back:hover { color: var(--accent-text); }
@media (max-width: 560px) {
  .nav { padding: 0 15px; }
  .nav-inner { gap: 10px; }
  .nav-logo .sb-logo-text { display: none; }  /* solo el monograma cabe en móvil */
  .nav-right { gap: 10px; }
  .nav-back { font-size: .64rem; letter-spacing: .04em; }
}