/* =========================================================
   CURIOSIDAD APLICADA — DESIGN SYSTEM
   Question → Investigation → Evidence → Clear explanation
   ========================================================= */

/* ---------- Tokens ---------- */
:root{
  --paper:      #FBFAF6;
  --paper-alt:  #F1EFE7;
  --ink:        #20242A;
  --ink-soft:   #5B6167;
  --ink-faint:  #6C6F74;
  --line:       #E3DFD3;
  --line-strong:#CDC7B6;
  --orange:     #BF511A;
  --orange-dark:#9C4013;
  --orange-tint:#FCE9DC;
  --teal:       #167A79;
  --teal-dark:  #0F5D5C;
  --teal-tint:  #DEEEED;
  --white:      #FFFFFF;

  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", serif;
  --font-body: "Work Sans", "Segoe UI", system-ui, -apple-system, sans-serif;

  --radius-lg: 22px;
  --radius-md: 14px;
  --radius-sm: 9px;
  --radius-pill: 999px;

  --container: 1180px;
  --gutter: clamp(20px, 5vw, 56px);

  --shadow-soft: 0 1px 2px rgba(32,36,42,0.04), 0 8px 24px rgba(32,36,42,0.05);
}

/* ---------- Reset ---------- */
*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}
body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; height:auto; display:block; }
a{ color: inherit; text-decoration: none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4,p,figure{ margin:0; }
button{ font-family: inherit; }
svg{ display:block; }

/* Focus visibility everywhere */
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible{
  outline: 2.5px solid var(--teal-dark);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link{
  position:absolute;
  left:-999px;
  top:auto;
  background: var(--ink);
  color: var(--paper);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  z-index: 999;
}
.skip-link:focus{
  left: 16px;
  top: 16px;
}

/* ---------- Typography ---------- */
h1,h2,h3,h4{
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.display-1{ font-size: clamp(2.4rem, 4.4vw, 3.6rem); line-height: 1.06; font-weight: 560; }
.display-2{ font-size: clamp(1.9rem, 3vw, 2.5rem); line-height: 1.14; }
h2.section-title{ font-size: clamp(1.5rem, 2.4vw, 1.9rem); line-height: 1.2; }
h3.card-title{ font-size: 1.2rem; line-height: 1.35; font-weight: 600; }

.lede{ font-size: 1.15rem; line-height: 1.6; color: var(--ink-soft); font-weight: 400; }
.text-soft{ color: var(--ink-soft); }
.small{ font-size: 0.9rem; }

.kicker{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--ink-faint);
  margin-bottom: 10px;
}
.kicker::before{
  content:"";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--orange);
  flex-shrink:0;
}

/* ---------- Layout ---------- */
.container{
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.prose-width{ max-width: 680px; }

section{ padding-block: clamp(48px, 7vw, 88px); }
section.tight{ padding-block: clamp(28px, 4vw, 44px); }

.visually-hidden{
  position:absolute !important;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden;
  clip: rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-weight: 600;
  font-size: 0.98rem;
  padding: 13px 24px;
  border-radius: var(--radius-pill);
  border: 1.5px solid transparent;
  cursor:pointer;
  transition: transform 0.15s ease, background 0.15s ease, border-color .15s ease, color .15s ease;
  white-space: nowrap;
}
.btn-primary{
  background: var(--orange);
  color: var(--white);
}
.btn-primary:hover{ background: var(--orange-dark); }
.btn-ghost{
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-ghost:hover{ border-color: var(--teal-dark); color: var(--teal-dark); }
.btn-text{
  padding: 0;
  border-radius: 2px;
  font-weight: 600;
  color: var(--teal-dark);
  border-bottom: 1.5px solid transparent;
}
.btn-text:hover{ border-bottom-color: currentColor; }
.btn-sm{ padding: 9px 16px; font-size: 0.88rem; }

/* ---------- Header / Nav ---------- */
.site-header{
  position: sticky;
  top:0;
  z-index: 50;
  background: rgba(251,250,246,0.92);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 16px;
}
.logo{
  display:flex;
  flex-direction:column;
  line-height:1;
  flex-shrink:0;
}
.logo strong{
  font-family: var(--font-display);
  font-size: 1.32rem;
  font-weight: 650;
  color: var(--ink);
}
.logo strong .dot{ color: var(--orange); }
.logo span.tagline{
  display:none;
  font-size: 0.72rem;
  color: var(--ink-faint);
  margin-top: 2px;
  font-family: var(--font-body);
}
@media (min-width: 720px){
  .logo span.tagline{ display:block; }
}

.main-nav{ display:none; }
.main-nav ul{ display:flex; align-items:center; gap: 30px; }
.main-nav a{
  font-size: 0.97rem;
  font-weight: 500;
  color: var(--ink-soft);
  padding-block: 4px;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover{ color: var(--ink); }
.main-nav a[aria-current="page"]{
  color: var(--ink);
  border-bottom-color: var(--orange);
  font-weight: 600;
}
@media (min-width: 920px){
  .main-nav{ display:block; }
}

.header-actions{ display:flex; align-items:center; gap: 14px; }
.icon-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: transparent;
  border: 1.5px solid transparent;
  color: var(--ink);
  cursor:pointer;
}
.icon-btn:hover{ border-color: var(--line-strong); }

.menu-toggle{ display:inline-flex; }
@media (min-width: 920px){ .menu-toggle{ display:none; } }

.mobile-nav{
  display:none;
  border-top: 1px solid var(--line);
  background: var(--paper);
}
.mobile-nav.is-open{ display:block; }
.mobile-nav ul{ display:flex; flex-direction:column; padding: 8px var(--gutter) 20px; }
.mobile-nav a{
  display:block;
  padding: 13px 2px;
  font-size: 1.05rem;
  font-weight: 500;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
}
.mobile-nav a[aria-current="page"]{ color: var(--orange-dark); font-weight: 650; }
@media (min-width: 920px){ .mobile-nav{ display:none !important; } }

.search-panel{
  display:none;
  border-top: 1px solid var(--line);
  background: var(--paper-alt);
}
.search-panel.is-open{ display:block; }
.search-panel form{
  display:flex;
  align-items:center;
  gap:10px;
  padding-block:16px;
}
.search-panel input[type="search"]{
  flex:1;
  border: 1.5px solid var(--line-strong);
  background: var(--white);
  border-radius: var(--radius-pill);
  padding: 11px 18px;
  font-size: 1rem;
  color: var(--ink);
}

/* ---------- Hero ---------- */
.hero{
  padding-block: clamp(40px, 6vw, 76px) clamp(48px, 6vw, 80px);
}
.hero-grid{
  display:grid;
  gap: 40px;
  align-items:center;
}
@media (min-width: 880px){
  .hero-grid{ grid-template-columns: 1.05fr 0.95fr; gap: 56px; }
}
.hero-copy p.lede{ margin-block: 18px 28px; max-width: 46ch; }
.hero-ctas{ display:flex; flex-wrap:wrap; align-items:center; gap: 20px; }
.hero-figure{
  position:relative;
  display:flex;
  justify-content:center;
}
.hero-figure img{ width: min(100%, 420px); }
.hero-note{
  position:absolute;
  bottom: -6px;
  right: 4px;
  max-width: 190px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--teal-dark);
  transform: rotate(-2deg);
  display:none;
}
@media (min-width: 620px){ .hero-note{ display:block; } }

/* ---------- Question / Investigation cards ---------- */
.card-grid{
  display:grid;
  gap: 18px;
  grid-template-columns: 1fr;
}
@media (min-width: 700px){
  .card-grid.cols-3{ grid-template-columns: repeat(3, 1fr); }
  .card-grid.cols-2{ grid-template-columns: repeat(2, 1fr); }
}

.q-card{
  display:flex;
  flex-direction:column;
  gap: 14px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 24px;
  transition: border-color .15s ease, transform .15s ease;
}
.q-card:hover{ border-color: var(--line-strong); }
.q-card .cat{
  display:flex; align-items:center; gap:8px;
  font-size: 0.8rem; font-weight: 650;
  color: var(--teal-dark);
}
.q-card .cat svg{ width:16px; height:16px; flex-shrink:0; }
.q-card h3{ font-size: 1.15rem; line-height:1.32; }
.q-card .go{
  margin-top:auto;
  display:inline-flex; align-items:center; gap:8px;
  font-weight:600; font-size:0.92rem; color: var(--ink);
}
.q-card .go svg{ width:16px; height:16px; transition: transform .15s ease; }
.q-card:hover .go svg{ transform: translateX(3px); }

/* Investigation card with image (Explorar) */
.i-card{
  display:flex;
  flex-direction:column;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow:hidden;
  transition: border-color .15s ease;
}
.i-card:hover{ border-color: var(--line-strong); }
.i-card .thumb{
  aspect-ratio: 4/3;
  background: var(--paper-alt);
  display:flex; align-items:center; justify-content:center;
  overflow:hidden;
}
.i-card .thumb img{ width: 78%; }
.i-card .thumb .icon-tile{
  width: 64px; height:64px;
  border-radius: 50%;
  display:flex; align-items:center; justify-content:center;
  background: rgba(255,255,255,0.55);
}
.i-card .thumb .icon-tile svg{ width:30px; height:30px; }
.i-card .body{ padding: 20px 22px 24px; display:flex; flex-direction:column; gap:10px; flex:1; }
.i-card .meta-row{
  display:flex; align-items:center; justify-content:space-between; gap:10px;
  font-size: 0.8rem; color: var(--ink-faint);
}
.i-card .cat{
  display:inline-flex; align-items:center; gap:6px;
  font-weight:650; color: var(--teal-dark); font-size:0.8rem;
}
.i-card .cat svg{ width:14px; height:14px; }
.i-card h3{ font-size: 1.12rem; line-height:1.3; }
.i-card p{ color: var(--ink-soft); font-size: 0.95rem; }
.i-card .footer-row{
  margin-top:auto; padding-top:10px;
  display:flex; align-items:center; justify-content:space-between;
  border-top: 1px solid var(--line);
  font-size:0.82rem; color: var(--ink-faint);
}
.author-chip{ display:flex; align-items:center; gap:8px; }
.author-chip .avatar{
  width:22px; height:22px; border-radius:50%;
  overflow:hidden; background: var(--teal); flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  color:#fff; font-size:0.62rem; font-weight:700; font-family: var(--font-body);
}
.author-chip .avatar img{ width:100%; height:100%; object-fit:cover; }
.article-meta .author-chip{ gap:10px; }
.article-meta .author-chip span:last-child{ display:flex; flex-direction:column; line-height:1.3; }

/* status badges (Preguntas) */
.badge{
  display:inline-flex; align-items:center; gap:6px;
  font-size:0.76rem; font-weight:650;
  padding: 5px 11px;
  border-radius: var(--radius-pill);
}
.badge::before{ content:""; width:6px; height:6px; border-radius:50%; flex-shrink:0; }
.badge.is-published{ background: var(--teal-tint); color: var(--teal-dark); }
.badge.is-published::before{ background: var(--teal); }
.badge.is-progress{ background: var(--orange-tint); color: var(--orange-dark); }
.badge.is-progress::before{ background: var(--orange); }
.badge.is-open{ background: var(--paper-alt); color: var(--ink-soft); }
.badge.is-open::before{ background: var(--ink-faint); }

/* ---------- Category / icon nav ---------- */
.cat-grid{
  display:grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}
@media (min-width: 620px){ .cat-grid{ grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 920px){ .cat-grid{ grid-template-columns: repeat(6, 1fr); gap:10px; } }

.cat-item{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap: 10px;
  text-align:center;
  padding: 20px 10px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
}
.cat-item:hover{ border-color: var(--line); background: var(--white); }
.cat-item .icon-wrap{
  width: 52px; height:52px;
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  background: var(--paper-alt);
}
.cat-item svg{ width:24px; height:24px; color: var(--teal-dark); }
.cat-item:nth-child(3n+1) svg{ color: var(--orange-dark); }
.cat-item span{ font-size:0.88rem; font-weight:600; }

/* ---------- CTA / methodology strip ---------- */
.strip{
  background: var(--paper-alt);
  border-radius: var(--radius-lg);
  padding: clamp(28px, 4vw, 44px);
  display:grid;
  gap: 30px;
  align-items:center;
}
@media (min-width: 780px){
  .strip{ grid-template-columns: auto 1fr auto; }
}
.strip .figure img{ width: 150px; }
.strip .steps{ font-family: var(--font-display); font-size:1.05rem; color: var(--ink-soft); line-height:1.9; }
.strip .note{
  font-family: var(--font-display);
  font-style: italic;
  color: var(--orange-dark);
  font-size:0.95rem;
  transform: rotate(-1.4deg);
  text-align:right;
  display:none;
}
@media (min-width: 780px){ .strip .note{ display:block; } }

/* ---------- Footer ---------- */
.site-footer{
  border-top: 1px solid var(--line);
  padding-block: 36px 30px;
  margin-top: 40px;
}
.footer-top{
  display:flex; flex-wrap:wrap; gap:20px;
  align-items:center; justify-content:space-between;
  padding-bottom: 22px;
}
.footer-nav ul{ display:flex; flex-wrap:wrap; gap: 20px; }
.footer-nav a{ font-size:0.92rem; color: var(--ink-soft); }
.footer-nav a:hover{ color: var(--ink); }
.footer-social{ display:flex; gap:12px; }
.footer-bottom{
  display:flex; flex-wrap:wrap; gap:10px;
  justify-content:space-between; align-items:center;
  padding-top: 20px; border-top:1px solid var(--line);
  font-size:0.84rem; color: var(--ink-faint);
}

/* ---------- Section headers ---------- */
.section-head{
  display:flex; align-items:flex-end; justify-content:space-between;
  gap: 20px; margin-bottom: 26px; flex-wrap:wrap;
}

/* ---------- Page hero (interior pages) ---------- */
.page-hero{ padding-block: clamp(40px,6vw,64px) clamp(20px,3vw,30px); }
.page-hero .display-2{ max-width: 20ch; }
.page-hero .lede{ max-width: 60ch; margin-top:14px; }

/* ---------- Filters / search bar (Explorar, Preguntas) ---------- */
.filter-bar{
  display:flex; flex-wrap:wrap; gap:10px 12px;
  align-items:center;
  padding-bottom: 26px;
}
.filter-bar .search-field{
  position:relative;
  flex: 1 1 240px;
}
.filter-bar .search-field svg{
  position:absolute; left:16px; top:50%; transform:translateY(-50%);
  width:18px; height:18px; color: var(--ink-faint); pointer-events:none;
}
.filter-bar input[type="search"]{
  width:100%;
  border:1.5px solid var(--line-strong);
  background: var(--white);
  border-radius: var(--radius-pill);
  padding: 12px 18px 12px 42px;
  font-size:0.98rem;
}
.chip{
  border: 1.5px solid var(--line-strong);
  background: var(--white);
  border-radius: var(--radius-pill);
  padding: 9px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink-soft);
  cursor:pointer;
}
.chip[aria-pressed="true"]{
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}
.empty-state{
  text-align:center;
  padding: 60px 20px;
  color: var(--ink-soft);
  display:none;
}
.empty-state.is-visible{ display:block; }

/* ---------- Methodology page steps ---------- */
.method-steps{
  display:flex; flex-direction:column;
  border-top:1px solid var(--line);
}
.method-step{
  display:grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  padding-block: 28px;
  border-bottom: 1px solid var(--line);
}
@media (min-width: 700px){
  .method-step{ grid-template-columns: 60px 1fr; padding-block:34px; }
}
.method-step .num{
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--line-strong);
  font-weight:600;
}
.method-step h3{ font-size:1.25rem; margin-bottom:8px; }
.method-step p{ color: var(--ink-soft); max-width: 64ch; }

.principle-grid{
  display:grid; gap:16px;
  grid-template-columns: 1fr;
}
@media (min-width:700px){ .principle-grid{ grid-template-columns: repeat(2,1fr); } }
.principle{
  padding: 22px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}
.principle h4{ font-size:1.02rem; margin-bottom:6px; }
.principle p{ font-size:0.94rem; color: var(--ink-soft); }

/* ---------- Article ---------- */
.article-head{ padding-block: clamp(36px,5vw,56px) 10px; }
.article-head .cat{
  display:inline-flex; align-items:center; gap:8px;
  color: var(--teal-dark); font-weight:650; font-size:0.85rem; margin-bottom:14px;
}
.article-head .cat svg{ width:16px; height:16px; }
.article-head h1{ max-width: 20ch; }
.article-meta{
  display:flex; flex-wrap:wrap; align-items:center; gap: 18px;
  margin-top: 20px; padding-top:20px; border-top:1px solid var(--line);
  font-size:0.88rem; color: var(--ink-faint);
}
.article-meta .author-chip .avatar{ width:32px; height:32px; }
.article-meta .author-chip strong{ color: var(--ink); font-size:0.94rem; display:block; }

.article-hero-figure{ margin-block: 28px 8px; }
.article-hero-figure img{ width:100%; border-radius: var(--radius-lg); }
.article-hero-figure figcaption{
  font-size:0.85rem; color: var(--ink-faint); margin-top:10px;
}

.article-body{
  padding-block: 10px 20px;
  display:grid;
  gap: 48px;
}
@media (min-width: 980px){
  .article-body{ grid-template-columns: 1fr 240px; align-items:start; }
}
.article-main > * + *{ margin-top: 22px; }
.article-main h2{ font-size:1.5rem; margin-top:44px; scroll-margin-top: 90px; }
.article-main h2:first-child{ margin-top:0; }
.article-main p{ max-width: 68ch; }
.article-main .answer-box{
  background: var(--teal-tint);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  max-width: 68ch;
}
.article-main .answer-box p{ color: var(--teal-dark); font-weight:500; margin:0; max-width:none; }
.article-main figure.evidence{
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 18px;
  max-width: 68ch;
}
.article-main figure.evidence img{ border-radius: var(--radius-sm); width:100%; }
.article-main figure.evidence figcaption{
  font-size:0.85rem; color: var(--ink-soft); margin-top:12px;
}
.uncertainty-box{
  border-left: 3px solid var(--orange);
  padding: 4px 0 4px 20px;
  max-width: 68ch;
}
.uncertainty-box p{ color: var(--ink-soft); }

.sources-list{ display:flex; flex-direction:column; gap:14px; max-width: 68ch; }
.source-item{
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.source-item .src-name{ font-weight:600; font-size:0.96rem; }
.source-item .src-meta{ font-size:0.83rem; color: var(--ink-faint); margin-top:3px; }

.toc{
  position: sticky; top: 96px;
  border-left: 2px solid var(--line);
  padding-left: 18px;
  display:none;
}
@media (min-width: 980px){ .toc{ display:block; } }
.toc-label{ font-size:0.78rem; font-weight:650; color: var(--ink-faint); margin-bottom:10px; }
.toc ul{ display:flex; flex-direction:column; gap:9px; }
.toc a{ font-size:0.9rem; color: var(--ink-soft); }
.toc a:hover{ color: var(--ink); }

.related-block{
  border-top: 1px solid var(--line);
  padding-block: 40px;
}
.next-question{
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius-lg);
  padding: clamp(26px,4vw,40px);
  display:flex; flex-wrap:wrap; gap:20px;
  align-items:center; justify-content:space-between;
  margin-top: 40px;
}
.next-question h3{ color: var(--paper); font-size:1.3rem; max-width: 24ch; }
.next-question .btn-primary{ background: var(--orange); }

/* ---------- About page ---------- */
.about-block{ display:grid; gap:40px; }
@media (min-width: 900px){ .about-block{ grid-template-columns: 1fr 1fr; align-items:start; } }
.about-figure img{ width: 100%; max-width: 340px; margin-inline:auto; }
.value-list{ display:flex; flex-direction:column; gap:22px; }
.value-item{ display:flex; gap:16px; }
.value-item .icon-wrap{
  width:40px; height:40px; border-radius:50%; flex-shrink:0;
  background: var(--paper-alt); display:flex; align-items:center; justify-content:center;
}
.value-item svg{ width:20px; height:20px; color: var(--teal-dark); }
.value-item h4{ font-size:1.02rem; margin-bottom:4px; }
.value-item p{ color: var(--ink-soft); font-size:0.95rem; }

.future-note{
  border: 1.5px dashed var(--line-strong);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  color: var(--ink-soft);
  font-size:0.95rem;
}

/* ---------- Utility ---------- */
.mt-0{ margin-top:0 !important; }
.flow > * + *{ margin-top: 16px; }