:root {
  --bg: #0D0E0F;
  --fg: #E6E6E6;
  --muted: #969B9F;
  --border: #303438;
  --card: #151719;
  --orange: #F36C21;
  --orange-soft: #F36C2144;
  --orange-bg: #1A140F;
  --green: #44D62C;
  --green-bg: #1A2318;

  --font-sans: 'IBM Plex Sans', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-serif: 'Literata', serif;
  --font-editorial: 'Source Serif 4', serif;
  --font-hand: 'Caveat', cursive;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
}

::selection { background: var(--orange-soft); }

a { color: var(--orange); text-decoration: none; }
a:hover { color: #F8874A; text-decoration: underline; }

.container { max-width: 1000px; margin: 0 auto; padding: 0 40px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 18px 40px; background: #0D0E0Fcc; backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-brand { display: flex; align-items: center; gap: 10px; }
.site-brand .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--orange); }
.site-brand span { font-size: 15px; font-weight: 600; letter-spacing: 0.01em; color: var(--fg); }
.site-nav { display: flex; align-items: center; gap: 28px; font-size: 14px; }
.site-nav a { color: var(--muted); }
.site-nav a.active { color: var(--orange); }
.site-nav .disabled { color: var(--muted); cursor: default; }
.site-nav .search {
  display: flex; align-items: center; gap: 6px; padding: 6px 12px;
  border: 1px solid var(--border); border-radius: 20px; color: var(--muted); font-size: 13px;
  background: transparent; font-family: var(--font-sans); cursor: pointer;
}
.site-nav .search:hover { color: var(--fg); border-color: var(--muted); }

/* Search page */
.search-page-input {
  display: flex; align-items: center; gap: 10px; padding: 14px 18px;
  border: 1px solid var(--border); border-radius: 8px; color: var(--muted);
  font-size: 16px; margin-bottom: 8px;
}
.search-page-input input {
  flex: 1; background: none; border: none; outline: none; color: var(--fg);
  font-family: var(--font-sans); font-size: 16px;
}
.search-page-input input::placeholder { color: var(--muted); }
.search-results { padding-top: 8px; }
.search-empty { padding: 20px 4px; color: var(--muted); font-size: 14px; }
.search-result { display: block; padding: 16px 4px; border-bottom: 1px solid var(--border); color: var(--fg); }
.search-result:first-child { border-top: 1px solid var(--border); }
.search-result:hover { background: var(--card); text-decoration: none; }
.search-result-section {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em;
  color: var(--orange); text-transform: uppercase;
}
.search-result h3 { margin: 4px 0; font-size: 16px; }
.search-result p { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.5; }

/* Hero */
.hero { max-width: 760px; margin: 0 auto; padding: 120px 40px 100px; text-align: center; }
.hero .eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; color: var(--muted); margin-bottom: 20px; }
.hero h1 { font-size: 52px; line-height: 1.15; font-weight: 600; margin: 0 0 22px; color: var(--fg); text-wrap: pretty; }
.hero p { font-size: 18px; line-height: 1.6; color: var(--muted); max-width: 560px; margin: 0 auto 36px; }
.hero .actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn-primary { background: var(--orange); color: var(--bg); border: none; padding: 13px 26px; border-radius: 6px; font-size: 15px; font-weight: 600; cursor: pointer; display: inline-block; }
.btn-primary:hover { color: var(--bg); text-decoration: none; opacity: 0.92; }
.btn-secondary { background: transparent; color: var(--fg); border: 1px solid var(--border); padding: 13px 26px; border-radius: 6px; font-size: 15px; font-weight: 500; cursor: pointer; display: inline-block; }
.btn-secondary:hover { color: var(--fg); text-decoration: none; border-color: var(--muted); }

/* Home sections */
.home-section { max-width: 900px; margin: 0 auto; padding: 20px 40px 80px; }
.home-section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 18px; }
.home-section-head h2 { font-size: 14px; font-family: var(--font-mono); letter-spacing: 0.08em; margin: 0; }
.home-section-head a { font-size: 13px; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 22px; display: block; color: var(--fg); }
.card:hover { text-decoration: none; border-color: var(--muted); }
.card-experiencia { border-left: 2px solid var(--orange); }
.card-eyebrow { font-size: 11px; font-family: var(--font-mono); letter-spacing: 0.08em; margin-bottom: 10px; }
.card h3 { margin: 0 0 8px; color: var(--fg); }
.card p { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.5; }
.card-experiencia h3 { font-family: var(--font-serif); font-size: 19px; font-weight: 600; }
.card-tecnico h3 { font-family: var(--font-mono); font-size: 17px; font-weight: 600; }
.card-opinion h3 { font-family: var(--font-editorial); font-size: 19px; font-weight: 600; }

.concept-chain-row { display: flex; gap: 24px; align-items: flex-start; }
.concept-chain { display: flex; flex-direction: column; gap: 6px; flex-shrink: 0; width: 160px; }
.concept-chain a, .concept-chain span.sep { text-align: center; }
.concept-chain a { cursor: pointer; padding: 8px 14px; border: 1px solid var(--border); border-radius: 20px; color: var(--muted); font-size: 14px; }
.concept-chain span.sep { color: var(--green); }
.concept-chain-grid { flex: 1; display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }

/* Article layout */
.article { max-width: 720px; margin: 0 auto; padding: 64px 32px 100px; }
.article-opinion { max-width: 760px; font-family: var(--font-editorial); }
.article-back { cursor: pointer; font-size: 13px; color: var(--muted); margin-bottom: 24px; display: inline-block; }
.article-eyebrow { display: flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; margin-bottom: 18px; }
.article-eyebrow.green { color: var(--green); }
.article-eyebrow.orange { color: var(--orange); }
.article-eyebrow .bar { width: 22px; height: 2px; background: var(--orange); }
.article h1 { margin: 0 0 16px; color: var(--fg); }
.article-tecnico h1 { font-family: var(--font-mono); font-size: 36px; font-weight: 600; line-height: 1.2; }
.article-experiencia h1 { font-family: var(--font-serif); font-size: 42px; font-weight: 600; line-height: 1.2; }
.article-experiencia .lead { font-family: var(--font-serif); font-size: 19px; line-height: 1.6; color: var(--muted); margin: 0 0 24px; }
.article-opinion h1 { font-size: 44px; font-weight: 600; line-height: 1.18; text-wrap: pretty; }
.article-opinion .lead { font-size: 20px; line-height: 1.6; color: var(--muted); margin: 0 0 28px; font-style: italic; }
.article-meta { font-size: 13px; color: var(--muted); margin-bottom: 40px; }
.article-tecnico .article-meta { font-family: var(--font-mono); }
.article-opinion-meta {
  display: flex; align-items: center; gap: 14px; font-family: var(--font-sans); font-size: 14px; color: var(--muted);
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); padding: 16px 0; margin-bottom: 40px;
}
.article-opinion-meta .author { color: var(--fg); font-weight: 500; }

.box { background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 20px 24px; margin-bottom: 28px; }
.box-label { font-size: 11px; font-family: var(--font-mono); letter-spacing: 0.08em; margin-bottom: 8px; }
.box-label.green { color: var(--green); }
.box-label.orange { color: var(--orange); }
.box-label.muted { color: var(--muted); }
.box p { font-size: 16px; line-height: 1.6; margin: 0; color: var(--fg); }
.box-quiet p { font-size: 15px; color: var(--muted); }
.box-idea { border-left: 2px solid var(--green); border-radius: 0; padding: 4px 0 4px 18px; background: transparent; }
.box-dashed { background: var(--bg); border: 1px dashed var(--border); }
.box-dashed p { font-size: 14px; color: var(--muted); }
.box-orange { background: var(--orange-bg); border-color: var(--orange-soft); }
.box-orange .box-label { color: var(--orange); }

.article-body p { font-size: 16px; line-height: 1.75; color: var(--fg); margin: 0 0 20px; }
.article-experiencia .article-body p, .article-experiencia .box p { font-family: var(--font-serif); font-size: 17px; line-height: 1.8; }
.article-opinion .article-body p { font-size: 18px; line-height: 1.85; margin: 0 0 24px; }
.article-opinion blockquote, .pull-quote {
  border-left: 2px solid var(--orange); padding: 2px 0 2px 24px; margin: 24px 0 32px;
  font-size: 24px; line-height: 1.5; font-style: italic; color: var(--fg);
}
.pull-quote p { margin: 0; font-size: inherit; line-height: inherit; color: inherit; }
.pull-quote-author {
  display: block; text-align: right; font-family: var(--font-sans); font-size: 14px; font-style: normal;
  color: var(--muted); margin-top: 10px;
}
.article-opinion img, .article-opinion .figure-placeholder {
  width: 100%; aspect-ratio: 16/7; margin: 36px 0; border-radius: 6px;
  background: repeating-linear-gradient(135deg, #151719 0px, #151719 12px, #1A1C1E 12px, #1A1C1E 24px);
  border: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 13px; color: var(--muted);
}
.article-opinion .figure-caption { font-family: var(--font-sans); font-size: 13px; color: var(--muted); margin: -24px 0 32px; text-align: center; }

.hand-quote { font-family: var(--font-hand); font-size: 22px; color: var(--muted); margin: 8px 0 40px 4px; transform: rotate(-1deg); }

.tag-row { margin-bottom: 48px; }
.tag-row-label { font-size: 11px; font-family: var(--font-mono); letter-spacing: 0.08em; color: var(--muted); margin-bottom: 10px; }
.tag-list { display: flex; gap: 10px; flex-wrap: wrap; }
.tag { padding: 6px 14px; border: 1px solid var(--border); border-radius: 20px; font-size: 13px; color: var(--green); }

.fuentes-block { font-family: var(--font-sans); }
.fuentes-list { font-size: 14px; line-height: 1.7; color: var(--muted); }
.fuentes-list ul, .fuentes-list ol { margin: 0; padding-left: 18px; }
.fuentes-list p { margin: 0 0 8px; font-size: 14px; color: var(--muted); }

.article-pager {
  display: flex; justify-content: space-between; border-top: 1px solid var(--border);
  padding-top: 24px; font-size: 14px; color: var(--muted);
}

/* Aprender index */
.aprender-layout { display: flex; align-items: flex-start; }
.aprender-sidebar {
  width: 200px; flex-shrink: 0; padding: 40px 20px; border-right: 1px solid var(--border);
  min-height: calc(100vh - 65px); box-sizing: border-box;
}
.aprender-sidebar nav { display: flex; flex-direction: column; gap: 4px; }
.aprender-sidebar a { cursor: pointer; padding: 9px 12px; border-radius: 6px; font-size: 14px; color: var(--muted); }
.aprender-sidebar a.active { background: var(--green-bg); color: var(--green); }
.aprender-main { flex: 1; min-width: 0; padding: 64px 40px 100px; }
.section-eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.1em; margin-bottom: 16px; }
.section-eyebrow.green { color: var(--green); }
.section-eyebrow.orange { color: var(--orange); }
.section-eyebrow.muted { color: var(--muted); }
.section-title { font-family: var(--font-mono); font-size: 34px; font-weight: 600; margin: 0 0 12px; color: var(--fg); }
.section-title-serif { font-family: var(--font-serif); font-size: 34px; font-weight: 600; margin: 0 0 12px; color: var(--fg); }
.section-title-editorial { font-size: 34px; font-weight: 600; margin: 0 0 12px; color: var(--fg); }
.section-desc { font-size: 16px; line-height: 1.6; color: var(--muted); margin: 0 0 36px; max-width: 520px; }
.tecnico-grid { display: grid; grid-template-columns: repeat(auto-fill, 400px); gap: 20px; margin-bottom: 44px; }
.tecnico-card { box-sizing: border-box; background: var(--card); border: 1px solid var(--border); border-radius: 6px; padding: 24px; display: flex; flex-direction: column; gap: 10px; }
.tecnico-card-eyebrow { font-size: 11px; font-family: var(--font-mono); color: var(--green); letter-spacing: 0.06em; }
.tecnico-card h3 { font-family: var(--font-mono); font-size: 18px; font-weight: 600; margin: 0; color: var(--fg); }
.tecnico-card p { font-size: 14px; color: var(--muted); margin: 0; line-height: 1.5; flex: 1; }
.tecnico-card .meta { font-size: 12px; color: var(--muted); }

/* Experiencias index */
.experiencia-list { display: flex; flex-direction: column; gap: 16px; margin-bottom: 44px; }
.experiencia-list .card { padding: 24px; }
.experiencia-list .meta { font-size: 12px; color: var(--muted); }
.experiencia-list h3 { font-family: var(--font-serif); font-size: 20px; font-weight: 600; margin: 0 0 8px; }
.experiencia-list p { font-family: var(--font-serif); font-size: 15px; color: var(--muted); margin: 0 0 10px; line-height: 1.6; }

/* Opinion index */
.opinion-list { display: flex; flex-direction: column; }
.opinion-item { padding: 28px 0; border-bottom: 1px solid var(--border); display: block; color: var(--fg); }
.opinion-item h3 { font-size: 23px; font-weight: 600; margin: 0 0 8px; color: var(--fg); }
.opinion-item p { font-size: 16px; color: var(--muted); margin: 0 0 10px; line-height: 1.6; font-style: italic; }
.opinion-item .meta { font-family: var(--font-sans); font-size: 13px; color: var(--muted); }

/* Pagination */
.pager { display: flex; justify-content: center; align-items: center; gap: 8px; font-size: 14px; margin-top: 24px; }
.pager a, .pager span { padding: 6px 12px; border-radius: 4px; color: var(--muted); }
.pager .current { font-weight: 600; }
.pager .current.green { background: var(--green); color: var(--bg); }
.pager .current.orange { background: var(--orange); color: var(--bg); }
.pager .disabled { color: var(--border); }

/* Glosario */
.glosario-list { display: flex; flex-direction: column; gap: 2px; margin-bottom: 44px; }
.glosario-item { padding: 18px 16px; border-bottom: 1px solid var(--border); color: var(--fg); border-radius: 6px; }
.glosario-item:hover { background: var(--card); text-decoration: none; }
.glosario-item h3 { margin: 0 0 6px; font-size: 17px; color: var(--fg); }
.glosario-item p { margin: 0; font-size: 14px; color: var(--muted); line-height: 1.5; }
.glosario-body p { font-size: 16px; line-height: 1.75; color: var(--fg); margin: 0 0 20px; }
a.glosario-link { color: var(--green); border-bottom: 1px dotted var(--green); text-decoration: none; }
a.glosario-link:hover { color: var(--green); border-bottom-style: solid; text-decoration: none; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); padding: 56px 40px 40px; margin-top: 20px; }
.footer-grid { max-width: 1000px; margin: 0 auto; display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 32px; }
.footer-col-label { font-size: 12px; font-family: var(--font-mono); letter-spacing: 0.08em; color: var(--muted); margin-bottom: 14px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; font-size: 14px; color: var(--muted); }
.footer-links a { color: var(--muted); }
.footer-tags { display: flex; flex-wrap: wrap; gap: 8px; font-size: 13px; color: var(--muted); }
.footer-tags span, .footer-tags a { border: 1px solid var(--border); border-radius: 20px; padding: 4px 10px; color: var(--muted); }
.footer-tags a:hover { color: var(--orange); border-color: var(--orange); text-decoration: none; }
.footer-bottom { max-width: 1000px; margin: 40px auto 0; padding-top: 20px; border-top: 1px solid var(--border); font-size: 13px; color: var(--muted); }

@media (max-width: 640px) {
  .site-header, .hero, .home-section, .article, .aprender-main { padding-left: 20px; padding-right: 20px; }
  .concept-chain-row { flex-direction: column; }
  .concept-chain { width: 100%; flex-direction: row; flex-wrap: wrap; }
  .aprender-layout { flex-direction: column; }
  .aprender-sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--border); min-height: auto; }
}