/* ============================================================
   AVHH & MTL — Brand CSS Kit  •  Blog Edition
   Visual Identity System v1.0
   ============================================================
   USO:
   1. Agrega en el <head> de cada página:
      <link rel="stylesheet" href="brand-kit.css">
   2. Copia el bloque de Google Fonts de abajo también en <head>
   ============================================================ */

/* ── Google Fonts ───────────────────────────────────────────── */
/* Pega esto en tu <head> ANTES del link al CSS:

<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;0,700;1,300;1,400&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600&display=swap" rel="stylesheet">

*/

/* ============================================================
   1. TOKENS — Variables CSS de Marca
   ============================================================ */
:root {
  /* Colores primarios */
  --navy:       #1B2F5B;
  --steel:      #2E4A80;
  --sky:        #5B7EC4;

  /* Colores de soporte */
  --light-blue: #D6E0F5;
  --off-white:  #F5F7FC;
  --mid-gray:   #8A95A8;
  --dark:       #2D3142;
  --white:      #FFFFFF;

  /* Aliases semanticos */
  --color-bg:           var(--off-white);
  --color-surface:      var(--white);
  --color-text:         var(--dark);
  --color-text-muted:   var(--mid-gray);
  --color-text-light:   var(--white);
  --color-primary:      var(--navy);
  --color-accent:       var(--sky);
  --color-border:       var(--light-blue);
  --color-border-dark:  rgba(91,126,196,0.3);

  /* Tipografia */
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono:    'Courier New', Courier, monospace;

  /* Escala tipografica */
  --text-xs:   0.75rem;
  --text-sm:   0.875rem;
  --text-base: 1rem;
  --text-lg:   1.125rem;
  --text-xl:   1.375rem;
  --text-2xl:  1.75rem;
  --text-3xl:  2.25rem;
  --text-4xl:  3rem;
  --text-hero: 4.5rem;

  /* Pesos */
  --w-light:   300;
  --w-regular: 400;
  --w-medium:  500;
  --w-semi:    600;
  --w-bold:    700;

  /* Interlineado */
  --leading-tight:  1.15;
  --leading-snug:   1.4;
  --leading-normal: 1.65;
  --leading-loose:  1.85;

  /* Tracking */
  --tracking-tight:   -0.025em;
  --tracking-normal:   0em;
  --tracking-wide:     0.05em;
  --tracking-wider:    0.1em;
  --tracking-widest:   0.2em;

  /* Espaciado */
  --s-1:  0.25rem;
  --s-2:  0.5rem;
  --s-3:  0.75rem;
  --s-4:  1rem;
  --s-5:  1.25rem;
  --s-6:  1.5rem;
  --s-8:  2rem;
  --s-10: 2.5rem;
  --s-12: 3rem;
  --s-16: 4rem;
  --s-20: 5rem;
  --s-24: 6rem;
  --s-32: 8rem;

  /* Radios */
  --r-sm:   3px;
  --r-md:   8px;
  --r-lg:   16px;
  --r-xl:   24px;
  --r-full: 9999px;

  /* Sombras */
  --shadow-xs: 0 1px 2px rgba(27,47,91,0.06);
  --shadow-sm: 0 2px 8px rgba(27,47,91,0.09);
  --shadow-md: 0 6px 24px rgba(27,47,91,0.13);
  --shadow-lg: 0 12px 48px rgba(27,47,91,0.18);
  --shadow-xl: 0 24px 80px rgba(27,47,91,0.22);

  /* Transiciones */
  --ease:    cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.84, 0);
  --t-fast:   150ms;
  --t-normal: 250ms;
  --t-slow:   400ms;

  /* Layout */
  --content-width: 680px;
  --wide-width:    900px;
  --max-width:    1200px;
}

/* Dark mode automatico */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg:         #0F1929;
    --color-surface:    #162240;
    --color-text:       #E2E8F5;
    --color-text-muted: #7A8799;
    --color-border:     rgba(91,126,196,0.18);
    --color-border-dark:rgba(91,126,196,0.35);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.35);
    --shadow-md: 0 6px 24px rgba(0,0,0,0.45);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.55);
  }
}

/* ============================================================
   2. RESET & BASE
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px; }

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--w-regular);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, video { max-width: 100%; height: auto; display: block; }

a {
  color: var(--sky);
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}
a:hover { color: var(--steel); }

ul, ol { list-style: none; }
button { cursor: pointer; font-family: var(--font-body); }

/* ============================================================
   3. TIPOGRAFIA
   ============================================================ */
.text-display {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: var(--w-light);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--navy);
}

h1, .h1 {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--w-semi);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--navy);
}
h2, .h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: var(--w-regular);
  line-height: var(--leading-snug);
  color: var(--navy);
}
h3, .h3 {
  font-family: var(--font-body);
  font-size: var(--text-xl);
  font-weight: var(--w-semi);
  line-height: var(--leading-snug);
  color: var(--dark);
}
h4, .h4 {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: var(--w-medium);
  color: var(--dark);
}
h5, .h5 {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--w-semi);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--dark);
}

p { line-height: var(--leading-loose); }

.label, .eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--w-semi);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--sky);
}

blockquote {
  border-left: 3px solid var(--sky);
  padding: var(--s-4) var(--s-6);
  margin: var(--s-8) 0;
  background-color: var(--light-blue);
  border-radius: 0 var(--r-md) var(--r-md) 0;
}
blockquote p {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: italic;
  color: var(--navy);
  line-height: var(--leading-snug);
  margin-bottom: 0;
}
blockquote cite {
  display: block;
  margin-top: var(--s-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-style: normal;
  color: var(--mid-gray);
  letter-spacing: var(--tracking-wide);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--light-blue);
  color: var(--navy);
  padding: 0.1em 0.4em;
  border-radius: var(--r-sm);
}

.text-navy   { color: var(--navy); }
.text-sky    { color: var(--sky); }
.text-muted  { color: var(--color-text-muted); }
.text-white  { color: var(--white); }
.text-italic { font-style: italic; }
.text-left   { text-align: left; }
.text-center { text-align: center; }
.text-right  { text-align: right; }

/* ============================================================
   4. LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--s-6);
}
.content-width { max-width: var(--content-width); margin-inline: auto; }
.wide-width    { max-width: var(--wide-width);    margin-inline: auto; }

.section    { padding-block: var(--s-20); }
.section-sm { padding-block: var(--s-12); }
.section-lg { padding-block: var(--s-32); }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s-8); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-8); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-6); }

.flex         { display: flex; }
.flex-center  { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-col     { display: flex; flex-direction: column; }
.flex-wrap    { flex-wrap: wrap; }
.items-center { align-items: center; }
.gap-2  { gap: var(--s-2); }
.gap-3  { gap: var(--s-3); }
.gap-4  { gap: var(--s-4); }
.gap-6  { gap: var(--s-6); }
.gap-8  { gap: var(--s-8); }

/* ============================================================
   5. NAVEGACION
   ============================================================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--s-4) var(--s-6);
  background-color: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
}
.nav-logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--w-semi);
  color: var(--navy);
  letter-spacing: var(--tracking-tight);
  text-decoration: none;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--s-8);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  font-weight: var(--w-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text);
  position: relative;
  padding-bottom: 2px;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 1.5px;
  background-color: var(--sky);
  transition: width var(--t-normal) var(--ease);
}
.nav-links a:hover, .nav-links a.active { color: var(--navy); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-dark { background-color: rgba(27,47,91,0.95); border-bottom-color: var(--steel); }
.nav-dark .nav-logo { color: var(--white); }
.nav-dark .nav-links a { color: rgba(255,255,255,0.75); }
.nav-dark .nav-links a:hover { color: var(--white); }

/* ============================================================
   6. HERO
   ============================================================ */
.hero {
  background-color: var(--navy);
  color: var(--white);
  padding-block: var(--s-24);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 60%, rgba(91,126,196,0.3) 0%, transparent 55%),
    radial-gradient(ellipse at 85% 15%, rgba(46,74,128,0.5) 0%, transparent 50%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; text-align: center; }
.hero h1, .hero h2 { color: var(--white); }
.hero p { color: rgba(255,255,255,0.72); }

/* Hero para articulo individual */
.hero-post {
  background-color: var(--navy);
  padding-block: var(--s-16);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero-post::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 100%, rgba(91,126,196,0.2) 0%, transparent 60%);
  pointer-events: none;
}
.hero-post .label    { color: var(--sky); }
.hero-post h1        { color: var(--white); margin-block: var(--s-4) var(--s-6); }
.hero-post .post-meta{ color: rgba(255,255,255,0.55); }

/* ============================================================
   7. BLOG — POST CARDS
   ============================================================ */
.post-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-xs);
  transition:
    transform    var(--t-normal) var(--ease),
    box-shadow   var(--t-normal) var(--ease),
    border-color var(--t-normal) var(--ease);
}
.post-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--sky);
}
.post-card-image {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--light-blue);
}
.post-card-image img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform var(--t-slow) var(--ease);
}
.post-card:hover .post-card-image img { transform: scale(1.04); }

.post-card-body {
  padding: var(--s-6);
  display: flex;
  flex-direction: column;
  flex: 1;
}
.post-card-meta {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  margin-bottom: var(--s-4);
}
.post-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--w-semi);
  line-height: var(--leading-snug);
  color: var(--navy);
  margin-bottom: var(--s-3);
  transition: color var(--t-fast) var(--ease);
}
.post-card:hover h3 { color: var(--sky); }
.post-card p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  flex: 1;
  margin-bottom: var(--s-6);
}

/* Card destacada */
.post-card-featured {
  grid-column: 1 / -1;
  flex-direction: row;
}
.post-card-featured .post-card-image { flex: 1; aspect-ratio: auto; min-height: 280px; }
.post-card-featured .post-card-body  { flex: 1; padding: var(--s-10); justify-content: center; }
.post-card-featured h3               { font-size: var(--text-3xl); }

/* ============================================================
   8. ARTICULO COMPLETO
   ============================================================ */
.article-body {
  max-width: var(--content-width);
  margin-inline: auto;
  padding-block: var(--s-12);
}
.article-body p {
  margin-bottom: var(--s-6);
  font-size: var(--text-lg);
  line-height: var(--leading-loose);
}
.article-body h2 { margin-top: var(--s-12); margin-bottom: var(--s-4); }
.article-body h3 { margin-top: var(--s-8);  margin-bottom: var(--s-3); }
.article-body h4 { margin-top: var(--s-6);  margin-bottom: var(--s-2); }

.article-body ul, .article-body ol {
  list-style: initial;
  padding-left: var(--s-6);
  margin-bottom: var(--s-6);
}
.article-body li {
  font-size: var(--text-lg);
  line-height: var(--leading-normal);
  margin-bottom: var(--s-2);
}
.article-body a {
  color: var(--sky);
  text-decoration: underline;
  text-decoration-color: rgba(91,126,196,0.4);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--t-fast) var(--ease);
}
.article-body a:hover { text-decoration-color: var(--sky); }
.article-body img {
  width: 100%;
  border-radius: var(--r-md);
  margin-block: var(--s-8);
  box-shadow: var(--shadow-md);
}
.article-body hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin-block: var(--s-10);
}
.article-body .drop-cap::first-letter {
  font-family: var(--font-display);
  font-size: 4.5em;
  font-weight: var(--w-bold);
  color: var(--navy);
  float: left;
  line-height: 0.75;
  margin-right: var(--s-2);
  margin-top: var(--s-1);
}

/* ============================================================
   9. META & CATEGORIAS
   ============================================================ */
.post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--s-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.post-meta-divider {
  width: 3px; height: 3px;
  border-radius: var(--r-full);
  background-color: var(--mid-gray);
}
.category-tag {
  display: inline-flex;
  align-items: center;
  font-size: var(--text-xs);
  font-weight: var(--w-semi);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  padding: var(--s-1) var(--s-3);
  border-radius: var(--r-full);
  background-color: var(--light-blue);
  color: var(--navy);
  text-decoration: none;
  transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.category-tag:hover    { background-color: var(--navy); color: var(--white); }
.category-tag-navy     { background-color: var(--navy);  color: var(--white); }
.category-tag-sky      { background-color: var(--sky);   color: var(--white); }
.category-tag-steel    { background-color: var(--steel); color: var(--white); }

/* Barra de progreso de lectura */
.reading-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2.5px;
  background: linear-gradient(90deg, var(--sky), var(--navy));
  z-index: 9999;
  transition: width 50ms linear;
}

/* ============================================================
   10. SIDEBAR
   ============================================================ */
.blog-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--s-12);
  align-items: start;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--s-6);
}
.sidebar {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: var(--s-8);
}
.sidebar-widget {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--r-lg);
  padding: var(--s-6);
}
.sidebar-widget h4 {
  font-size: var(--text-xs);
  font-weight: var(--w-semi);
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--mid-gray);
  margin-bottom: var(--s-4);
  padding-bottom: var(--s-3);
  border-bottom: 1px solid var(--color-border);
}
.sidebar-widget ul { list-style: none; }
.sidebar-widget li {
  padding-block: var(--s-2);
  border-bottom: 1px solid var(--color-border);
}
.sidebar-widget li:last-child { border-bottom: none; }
.sidebar-widget a { font-size: var(--text-sm); color: var(--color-text); font-weight: var(--w-medium); }
.sidebar-widget a:hover { color: var(--sky); }

/* ============================================================
   11. NEWSLETTER / CTA
   ============================================================ */
.newsletter {
  background-color: var(--navy);
  border-radius: var(--r-xl);
  padding: var(--s-12) var(--s-10);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.newsletter::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(91,126,196,0.35) 0%, transparent 65%);
  pointer-events: none;
}
.newsletter > * { position: relative; z-index: 1; }
.newsletter h2  { color: var(--white); margin-bottom: var(--s-3); }
.newsletter p   { color: rgba(255,255,255,0.65); margin-bottom: var(--s-8); }

.newsletter-form {
  display: flex;
  gap: var(--s-3);
  max-width: 440px;
  margin-inline: auto;
}
.newsletter-form input {
  flex: 1;
  padding: var(--s-3) var(--s-4);
  border-radius: var(--r-sm);
  border: 1px solid rgba(255,255,255,0.2);
  background-color: rgba(255,255,255,0.1);
  color: var(--white);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  outline: none;
  transition: border-color var(--t-fast) var(--ease);
}
.newsletter-form input::placeholder { color: rgba(255,255,255,0.4); }
.newsletter-form input:focus        { border-color: var(--sky); }

/* ============================================================
   12. BOTONES
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: var(--w-medium);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  padding: var(--s-3) var(--s-8);
  border-radius: var(--r-sm);
  border: 1.5px solid transparent;
  text-decoration: none;
  transition:
    background-color var(--t-normal) var(--ease),
    color            var(--t-normal) var(--ease),
    border-color     var(--t-normal) var(--ease),
    box-shadow       var(--t-normal) var(--ease),
    transform        var(--t-fast)   var(--ease);
}
.btn:active { transform: translateY(1px); }

.btn-primary { background-color: var(--navy); color: var(--white); border-color: var(--navy); }
.btn-primary:hover { background-color: var(--steel); border-color: var(--steel); color: var(--white); box-shadow: var(--shadow-md); }

.btn-secondary { background-color: transparent; color: var(--navy); border-color: var(--navy); }
.btn-secondary:hover { background-color: var(--navy); color: var(--white); }

.btn-ghost { background-color: transparent; color: var(--sky); border-color: transparent; padding-inline: 0; }
.btn-ghost:hover { color: var(--navy); }

.btn-light { background-color: var(--white); color: var(--navy); border-color: var(--white); }
.btn-light:hover { background-color: var(--light-blue); border-color: var(--light-blue); }

.btn-sm { font-size: var(--text-xs); padding: var(--s-2) var(--s-5); }
.btn-lg { font-size: var(--text-base); padding: var(--s-4) var(--s-10); }

/* ============================================================
   13. FOOTER
   ============================================================ */
.footer {
  background-color: var(--navy);
  color: rgba(255,255,255,0.6);
  padding-block: var(--s-12);
  margin-top: var(--s-20);
}
.footer-logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--white);
  font-weight: var(--w-light);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--s-2);
}
.footer-links { display: flex; gap: var(--s-6); flex-wrap: wrap; list-style: none; }
.footer-links a { font-size: var(--text-sm); color: rgba(255,255,255,0.55); letter-spacing: var(--tracking-wide); }
.footer-links a:hover { color: var(--white); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  margin-top: var(--s-8);
  padding-top: var(--s-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--s-4);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  color: rgba(255,255,255,0.35);
}

/* ============================================================
   14. UTILIDADES
   ============================================================ */
.bg-navy       { background-color: var(--navy); }
.bg-steel      { background-color: var(--steel); }
.bg-sky        { background-color: var(--sky); }
.bg-light-blue { background-color: var(--light-blue); }
.bg-off-white  { background-color: var(--off-white); }
.bg-white      { background-color: var(--white); }
.bg-surface    { background-color: var(--color-surface); }

.mt-2  { margin-top: var(--s-2); }    .mb-2  { margin-bottom: var(--s-2); }
.mt-4  { margin-top: var(--s-4); }    .mb-4  { margin-bottom: var(--s-4); }
.mt-6  { margin-top: var(--s-6); }    .mb-6  { margin-bottom: var(--s-6); }
.mt-8  { margin-top: var(--s-8); }    .mb-8  { margin-bottom: var(--s-8); }
.mt-12 { margin-top: var(--s-12); }   .mb-12 { margin-bottom: var(--s-12); }
.mt-16 { margin-top: var(--s-16); }   .mb-16 { margin-bottom: var(--s-16); }
.pt-4  { padding-top: var(--s-4); }   .pb-4  { padding-bottom: var(--s-4); }
.pt-8  { padding-top: var(--s-8); }   .pb-8  { padding-bottom: var(--s-8); }
.pt-12 { padding-top: var(--s-12); }  .pb-12 { padding-bottom: var(--s-12); }
.mx-auto { margin-inline: auto; }

.rounded-sm   { border-radius: var(--r-sm); }
.rounded-md   { border-radius: var(--r-md); }
.rounded-lg   { border-radius: var(--r-lg); }
.rounded-full { border-radius: var(--r-full); }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.hidden   { display: none; }
.block    { display: block; }
.relative { position: relative; }
.overflow-hidden { overflow: hidden; }

.prose    { max-width: var(--content-width); margin-inline: auto; }
.prose-sm { max-width: 54ch; }

.divider { border: none; border-top: 1px solid var(--color-border); margin-block: var(--s-8); }
.divider-navy { border-color: var(--navy); }

.accent-bar { display: block; width: 36px; height: 2px; background-color: var(--sky); margin-bottom: var(--s-3); }

.avatar { border-radius: var(--r-full); overflow: hidden; background-color: var(--light-blue); flex-shrink: 0; }
.avatar-sm { width: 32px;  height: 32px; }
.avatar-md { width: 48px;  height: 48px; }
.avatar-lg { width: 72px;  height: 72px; }

/* ============================================================
   15. ANIMACIONES
   ============================================================ */
@keyframes fadeInUp   { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn     { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideInLeft{ from { opacity: 0; transform: translateX(-20px); } to { opacity: 1; transform: translateX(0); } }

.animate-fade-up  { animation: fadeInUp    0.6s var(--ease) both; }
.animate-fade-in  { animation: fadeIn      0.4s var(--ease) both; }
.animate-slide-in { animation: slideInLeft 0.6s var(--ease) both; }

.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* ============================================================
   16. RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .blog-layout { grid-template-columns: 1fr; }
  .sidebar     { position: static; }
  .post-card-featured { flex-direction: column; }
  .post-card-featured .post-card-image { min-height: 220px; }
}
@media (max-width: 768px) {
  :root { --text-hero: 3rem; }
  h1, .h1       { font-size: var(--text-3xl); }
  h2, .h2       { font-size: var(--text-2xl); }
  .text-display { font-size: var(--text-4xl); }
  .container, .blog-layout { padding-inline: var(--s-4); }
  .section      { padding-block: var(--s-12); }
  .section-lg   { padding-block: var(--s-16); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-links    { display: none; }
  .newsletter-form { flex-direction: column; }
  .footer-bottom   { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .post-card-body { padding: var(--s-4); }
  .newsletter     { padding: var(--s-8) var(--s-5); }
}
