/* ─────────────────────────────────────
   Núcleo — shared components
   All reusable UI patterns used across every episode.
   Load AFTER shared/tokens.css.
   ───────────────────────────────────── */

/* ─────────────────────────────────────
   topbar
   ───────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 2rem;
  padding: 0.875rem clamp(1rem, 4vw, 2rem);
  background: color-mix(in oklab, var(--paper) 88%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--mist-2);
}
.brand { display: flex; align-items: center; gap: 0.625rem; border: none; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand-mark { width: 32px; height: 32px; color: var(--ink); }
.brand-mark.big { width: 56px; height: 56px; margin-bottom: 1rem; }
.brand-word { font-size: 1.4rem; line-height: 1; }
.brand-word::before { content: "Núcleo"; }
.topnav { display: none; gap: 1.5rem; margin-left: auto; }
.topnav a { font-size: 0.875rem; border: none; }
.topnav a:hover { color: var(--signal); }
.ep-tag { font-size: 0.7rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--graphite); margin-left: auto; }
@media (min-width: 760px) { .topnav { display: flex; } .ep-tag { margin-left: 0; } }

/* ─────────────────────────────────────
   hero (base — layout detail in episode.css)
   ───────────────────────────────────── */
.hero {
  position: relative; max-width: var(--maxw); margin: 0 auto;
  padding: clamp(3rem, 8vw, 7rem) clamp(1rem, 4vw, 2.5rem) clamp(4rem, 8vw, 8rem);
}
.hero-meta {
  display: flex; gap: 1rem; flex-wrap: wrap;
  font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--graphite); margin-bottom: 2rem;
}
.hero-meta span + span::before { content: "·"; margin-right: 1rem; color: var(--mist); }
.hero-meta span:first-child::before { content: ""; margin: 0; }
.hero-title {
  font-size: clamp(2.6rem, 7vw, 6rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin-bottom: 2rem;
  max-width: 18ch;
}
.hero-title .hl {
  background: linear-gradient(180deg, transparent 60%, var(--signal-soft) 60%);
  padding: 0 0.05em;
}
.hero-deck {
  font-size: clamp(1.1rem, 1.6vw, 1.35rem);
  max-width: 55ch;
  color: var(--graphite);
  line-height: 1.55;
}
.hero-deck .num { color: var(--ink); font-weight: 600; }

/* ─────────────────────────────────────
   hero collage (base grid — override in episode.css)
   ───────────────────────────────────── */
.hero-collage {
  position: relative;
  margin-top: 4rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;           /* episodes override at ≥ 760px */
}

/* ─────────────────────────────────────
   clip — polaroid-style photo card
   ───────────────────────────────────── */
.clip {
  position: relative;
  background: #fff;
  padding: 0.75rem 0.75rem 2.25rem;
  box-shadow:
    0 1px 0 rgba(11, 18, 32, 0.05),
    0 18px 32px -22px rgba(11, 18, 32, 0.4);
  transform: rotate(var(--rot, 0));
  transition: transform 400ms var(--ease-spring), box-shadow 400ms var(--ease-spring);
}
.clip:hover {
  transform: rotate(0deg) translateY(-3px);
  box-shadow:
    0 1px 0 rgba(11, 18, 32, 0.05),
    0 22px 40px -22px rgba(11, 18, 32, 0.5);
}
.clip img { width: 100%; height: 100%; object-fit: cover; }
.clip-cite, .clip figcaption {
  position: absolute; bottom: 0.6rem; left: 0.75rem; right: 0.75rem;
  font-size: 0.65rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--graphite);
}
.clip.note {
  background: var(--bone);
  display: flex; flex-direction: column; gap: 0.5rem; justify-content: center;
  padding: 1.5rem;
  font-size: 1.05rem;
  color: var(--ink);
}
.clip.note span   { font-size: 0.7rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--graphite); }
.clip.note strong { font-size: 1.6rem; line-height: 1.2; }

/* ─────────────────────────────────────
   scroll hint
   ───────────────────────────────────── */
.scroll-hint {
  display: flex; align-items: center; gap: 0.5rem;
  margin-top: 3rem;
  color: var(--graphite);
  font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  animation: hint 2.4s ease-in-out infinite;
}
@keyframes hint {
  0%, 100% { transform: translateY(0); opacity: 0.7; }
  50%       { transform: translateY(4px); opacity: 1; }
}

/* ─────────────────────────────────────
   prose blocks
   ───────────────────────────────────── */
.prose {
  max-width: var(--readw);
  margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) clamp(1rem, 4vw, 2rem);
}
.prose h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin: 0.5rem 0 1.5rem;
  line-height: 1.15;
}
.prose p { margin-bottom: 1.25rem; }
.prose p:last-child { margin-bottom: 0; }

.kicker {
  font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--signal);
  display: inline-block;
  padding: 0.25rem 0;
  border-bottom: 1px solid var(--signal);
  margin-bottom: 1rem;
}

.caveats {
  margin-top: 2.5rem;
  border-top: 1px solid var(--mist-2);
  padding-top: 1.25rem;
}
.caveats summary {
  cursor: pointer;
  font-size: 1rem; letter-spacing: -0.01em;
  margin-bottom: 0.75rem;
  list-style: none;
}
.caveats summary::-webkit-details-marker { display: none; }
.caveats summary::before         { content: "+ "; color: var(--signal); margin-right: 0.5rem; }
.caveats[open] summary::before   { content: "− "; }
.caveats ul { padding-left: 1.25rem; color: var(--graphite); }
.caveats li { margin-bottom: 0.5rem; }

/* ─────────────────────────────────────
   finding (full-bleed stat block)
   ───────────────────────────────────── */
.finding {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 4vw, 2rem);
  margin: clamp(3rem, 6vw, 5rem) 0;
}
.finding .kicker { color: var(--signal); }
.finding-grid {
  max-width: var(--maxw); margin: 0 auto;
  display: grid; gap: 2rem;
  grid-template-columns: 1fr;
}
@media (min-width: 860px) {
  .finding-grid { grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
}
.big-stat       { padding-top: 1.5rem; border-top: 2px solid var(--signal); }
.big-stat.alt   { border-top-color: var(--paper); }
.big-stat.alt2  { border-top-color: var(--lab-green); }
.small-label {
  font-size: 0.7rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: color-mix(in oklab, var(--paper) 70%, transparent);
}
.num-mega {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(3.5rem, 7vw, 5.5rem);
  line-height: 1;
  margin: 0.75rem 0 1rem;
  letter-spacing: -0.02em;
  color: var(--paper);
}
.big-stat p      { color: color-mix(in oklab, var(--paper) 80%, transparent); font-size: 1rem; }
.big-stat strong { color: var(--paper); }
.big-stat sup a  { color: var(--signal); }

/* ─────────────────────────────────────
   explainer (2-col text + figure)
   ───────────────────────────────────── */
.explainer {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) clamp(1rem, 4vw, 2rem);
  display: grid; gap: 2.5rem; align-items: center;
  grid-template-columns: 1fr;
}
@media (min-width: 860px) {
  .explainer { grid-template-columns: 1fr 1fr; gap: 4rem; }
}
.explainer-text h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin: 0.5rem 0 1.5rem; }
.explainer-text p  { margin-bottom: 1.1rem; max-width: 50ch; }
.explainer-figure {
  background: #fff;
  padding: 1rem;
  box-shadow: 0 18px 40px -28px rgba(11, 18, 32, 0.4);
}
.explainer-figure img { width: 100%; height: auto; }
.explainer-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.7rem; letter-spacing: 0.05em;
  color: var(--graphite); line-height: 1.5;
}
.explainer-figure figcaption a { font-size: inherit; }

/* ─────────────────────────────────────
   chart sections
   ───────────────────────────────────── */
.chart-section {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) clamp(1rem, 4vw, 2rem);
}
.chart-section.paper-bg {
  background: var(--bone);
  max-width: none;
  padding-left:  clamp(1rem, 4vw, 2rem);
  padding-right: clamp(1rem, 4vw, 2rem);
}
.chart-section.paper-bg > * { max-width: var(--maxw); margin-left: auto; margin-right: auto; }
.chart-header { margin-bottom: 2.5rem; max-width: 60ch; }
.chart-header h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin: 0.5rem 0 1rem; line-height: 1.15; }
.chart-deck { color: var(--graphite); }
.chart-frame {
  width: 100%;
  min-height: 360px;
  margin-top: 1rem;
  position: relative;
}
.chart-frame-tall { min-height: 420px; }
.chart-source {
  margin-top: 1rem;
  font-size: 0.7rem; letter-spacing: 0.05em;
  color: var(--graphite);
}
.chart-frame svg { overflow: visible; width: 100%; height: 100%; }

/* paper clipping inside sections */
.paper-clip {
  margin-top: 3rem;
  background: #fff;
  padding: 1rem;
  box-shadow: 0 18px 40px -24px rgba(11, 18, 32, 0.45);
  transform: rotate(var(--rot, 0));
  max-width: 720px;
}
.paper-clip img { width: 100%; height: auto; }
.paper-clip figcaption {
  margin-top: 0.75rem;
  font-size: 0.7rem; letter-spacing: 0.05em; line-height: 1.6;
  color: var(--graphite);
}
.paper-clip figcaption span { display: block; margin-top: 0.25rem; color: var(--mist); }

/* ─────────────────────────────────────
   D3 chart element styles
   ───────────────────────────────────── */
.bar              { fill: var(--ink); transition: fill 200ms; }
.bar.signal       { fill: var(--signal); }
.bar.alt          { fill: var(--lab-green); }
.bar:hover        { fill: var(--signal); }
.axis text        { font-family: var(--font-mono); font-size: 11px; fill: var(--graphite); }
.axis line,
.axis path        { stroke: var(--mist); shape-rendering: crispEdges; }
.grid line        { stroke: var(--mist-2); stroke-dasharray: 2 3; }
.grid path        { display: none; }
.label            { font-family: var(--font-mono); font-size: 11px; fill: var(--ink); font-variant-numeric: tabular-nums; }
.label-strong     { font-family: var(--font-sans); font-size: 13px; fill: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }

.tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--ink);
  color: var(--paper);
  padding: 0.6rem 0.8rem;
  border-radius: 4px;
  font-size: 12px;
  line-height: 1.5;
  max-width: 240px;
  opacity: 0;
  transform: translate(-50%, -110%);
  transition: opacity 180ms;
  z-index: 10;
}
.tooltip.show  { opacity: 1; }
.tooltip strong { color: var(--signal); }

/* ─────────────────────────────────────
   sources & citation list
   ───────────────────────────────────── */
.sources {
  max-width: var(--readw); margin: 0 auto;
  padding: clamp(3rem, 6vw, 5rem) clamp(1rem, 4vw, 2rem);
}
.sources h2 { font-size: clamp(1.6rem, 2.5vw, 2rem); margin-bottom: 2rem; }
.cite-list { list-style: none; counter-reset: c; }
.cite-list > li {
  counter-increment: c;
  position: relative;
  padding: 1.25rem 0 1.25rem 2.5rem;
  border-top: 1px solid var(--mist-2);
}
.cite-list > li::before {
  content: counter(c);
  position: absolute; left: 0; top: 1.25rem;
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--signal); font-weight: 500;
}
.cite-list > li:last-child { border-bottom: 1px solid var(--mist-2); }
.cite-list p { margin-bottom: 0.4rem; font-size: 0.95rem; }
.cite-list .font-mono { font-size: 0.75rem; color: var(--graphite); }

/* ─────────────────────────────────────
   footer
   ───────────────────────────────────── */
/* ─────────────────────────────────────
   episode navigation (standalone dark band before footer)
   ───────────────────────────────────── */
.ep-nav {
  background: var(--ink-2);
  padding: clamp(2rem, 4vw, 3rem) clamp(1rem, 4vw, 2rem);
  display: flex;
  gap: 1rem;
  border-bottom: 1px solid color-mix(in oklab, var(--paper) 8%, transparent);
}
.ep-nav-link {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
  border: 1px solid color-mix(in oklab, var(--paper) 16%, transparent);
  border-radius: 6px;
  padding: 1.25rem 1.5rem;
  text-decoration: none;
  color: var(--paper);
  transition: border-color 200ms, background 200ms;
}
.ep-nav-link:hover {
  border-color: var(--signal);
  background: color-mix(in oklab, var(--signal) 8%, transparent);
  color: var(--paper);
}
.ep-nav-link.next { text-align: right; }
.ep-nav-dir {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: color-mix(in oklab, var(--paper) 45%, transparent);
}
.ep-nav-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.25;
}
.ep-nav-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--signal);
  letter-spacing: 0.06em;
}
@media (max-width: 500px) {
  .ep-nav { flex-direction: column; }
  .ep-nav-link.next { text-align: left; }
}

.foot {
  background: var(--ink);
  color: var(--paper);
  padding: clamp(3rem, 6vw, 5rem) clamp(1rem, 4vw, 2rem);
}
.foot a { color: var(--paper); border-color: color-mix(in oklab, var(--paper) 30%, transparent); }
.foot a:hover { color: var(--signal); border-color: var(--signal); }
.foot-grid {
  max-width: var(--maxw); margin: 0 auto;
  display: grid; gap: 2.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 760px) {
  .foot-grid { grid-template-columns: 2fr 1fr 1fr; gap: 4rem; }
}
.foot .brand-mark { color: var(--paper); }
/* CANONICAL TAGLINE — sourced from CSS, no need to repeat in HTML */
.foot-tag   { font-size: 1.4rem; margin-bottom: 0.75rem; }
.foot-tag::before { content: "Núcleo — el centro de una idea."; }
.foot .muted { color: color-mix(in oklab, var(--paper) 60%, transparent); max-width: 40ch; }
.foot .small-label {
  color: color-mix(in oklab, var(--paper) 55%, transparent);
  display: block; margin-bottom: 0.5rem;
}
.foot-fine {
  max-width: var(--maxw); margin: 3rem auto 0;
  font-size: 0.7rem; letter-spacing: 0.05em;
  color: color-mix(in oklab, var(--paper) 45%, transparent);
  border-top: 1px solid color-mix(in oklab, var(--paper) 18%, transparent);
  padding-top: 1.5rem;
}

/* ─────────────────────────────────────
   scroll-reveal animation (driven by shared/motion.js)
   ───────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--dur) var(--ease-spring), transform var(--dur) var(--ease-spring);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}