/* ============================================================================
   Blog / Guías — MF Tech AR
   Diseño moderno: hero con degradado, columna lateral sticky con índice,
   tipografía de lectura cómoda, acordeones y tarjetas.
   ========================================================================== */

/* ---------- Barra de progreso de lectura ---------- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 120;
  background: transparent;
  pointer-events: none;
}
.reading-progress i {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #40e0d0, #7a5cff);
  box-shadow: 0 0 12px rgba(64, 224, 208, 0.6);
  transition: width 0.1s linear;
}

/* ---------- Teaser del blog (en el sitio principal) ---------- */
.blog-teaser {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(20px, 3vw, 34px);
  align-items: center;
  margin-top: 30px;
  padding: clamp(22px, 3vw, 32px);
  border-radius: var(--radius);
  border: 1px solid rgba(64, 224, 208, 0.22);
  background: radial-gradient(700px 260px at 85% 0%, rgba(64, 224, 208, 0.12), transparent 62%), rgba(255, 255, 255, 0.03);
}
.bt-copy h3 { font-size: clamp(1.15rem, 2.2vw, 1.45rem); margin-bottom: 8px; }
.bt-copy p { color: var(--txt-soft); font-weight: 300; font-size: 0.95rem; margin: 0 0 16px; max-width: 52ch; }
.bt-list { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
.bt-list a {
  display: block;
  padding: 11px 15px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(0, 0, 0, 0.22);
  color: var(--txt-soft);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}
.bt-list a::before { content: "\2192 "; color: var(--turq); }
.bt-list a:hover {
  color: #fff;
  border-color: rgba(64, 224, 208, 0.45);
  background: rgba(64, 224, 208, 0.08);
  transform: translateX(3px);
}

/* ---------- Hub del blog ---------- */
.blog-hero {
  position: relative;
  padding: clamp(46px, 7vw, 86px) 0 clamp(26px, 4vw, 42px);
  text-align: center;
  overflow: hidden;
}
.blog-hero::before {
  content: "";
  position: absolute;
  inset: -40% 0 auto 0;
  height: 340px;
  background: radial-gradient(60% 100% at 50% 0%, rgba(64, 224, 208, 0.16), transparent 70%);
  pointer-events: none;
}
.blog-hero h1 {
  position: relative;
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
.blog-hero p {
  position: relative;
  color: var(--txt-soft);
  font-weight: 300;
  max-width: 62ch;
  margin: 0 auto;
  font-size: clamp(0.99rem, 1.4vw, 1.14rem);
  line-height: 1.6;
}
.blog-hero .hero-tags {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 22px;
}
.blog-hero .hero-tags span {
  font-size: 0.78rem;
  color: var(--turq);
  border: 1px solid rgba(64, 224, 208, 0.28);
  background: rgba(64, 224, 208, 0.07);
  border-radius: 999px;
  padding: 5px 13px;
}

/* ---------- Grilla de artículos (mismo estilo que las tarjetas de servicios) ---------- */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  padding-bottom: clamp(40px, 6vw, 80px);
}
.post-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}
.post-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(400px 160px at 20% 0%, rgba(64, 224, 208, 0.12), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.post-card:hover {
  transform: translateY(-4px);
  border-color: rgba(64, 224, 208, 0.38);
  background: var(--surface-2);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.32);
}
.post-card:hover::after { opacity: 1; }
.post-ico {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
  flex: 0 0 auto;
}
.post-ico svg { width: 26px; height: 26px; }
.post-card h3 {
  font-size: 1.12rem;
  margin: 0;
  line-height: 1.3;
  letter-spacing: -0.01em;
}
.post-card p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--txt-soft);
  font-weight: 300;
  line-height: 1.58;
  flex: 1;
}
.post-card .pmeta {
  font-size: 0.8rem;
  color: var(--txt-dim);
  display: flex;
  gap: 10px;
  align-items: center;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}
.post-card .pmeta::after {
  content: "Leer →";
  margin-left: auto;
  color: var(--turq);
  font-weight: 600;
  flex: 0 0 auto;
}

/* ============================================================================
   ARTÍCULO
   ========================================================================== */
.article-wrap { padding-bottom: clamp(50px, 7vw, 90px); }

.breadcrumb {
  font-size: 0.8rem;
  color: var(--txt-dim);
  padding: 22px 0 4px;
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
  align-items: center;
}
.breadcrumb a { color: var(--txt-dim); text-decoration: none; transition: color 0.18s ease; }
.breadcrumb a:hover { color: var(--turq); }
.breadcrumb .sep { opacity: 0.45; }

/* Hero del artículo */
.article-hero {
  position: relative;
  padding: clamp(20px, 2.4vw, 30px) 0 clamp(22px, 2.6vw, 30px);
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
  overflow: hidden;
}
.article-hero::before {
  content: "";
  position: absolute;
  inset: -60% -20% auto -20%;
  height: 320px;
  background: radial-gradient(55% 100% at 28% 0%, rgba(64, 224, 208, 0.14), transparent 70%);
  pointer-events: none;
}
.article-hero > * { position: relative; }
.article-hero .cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--turq);
  background: rgba(64, 224, 208, 0.09);
  border: 1px solid rgba(64, 224, 208, 0.28);
  border-radius: 999px;
  padding: 6px 14px;
  margin-bottom: 16px;
}
.article-hero h1 {
  font-size: clamp(1.9rem, 4.4vw, 3rem);
  margin: 0 0 14px;
  line-height: 1.12;
  letter-spacing: -0.025em;
  max-width: 22ch;
}
.article-hero .lead {
  font-size: clamp(1rem, 1.5vw, 1.16rem);
  color: var(--txt-soft);
  font-weight: 300;
  max-width: 66ch;
  margin: 0 0 18px;
  line-height: 1.62;
}
.article-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
  font-size: 0.8rem;
  color: var(--txt-dim);
}
.article-meta span:not(.sep) {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
}
.article-meta .sep { opacity: 0.4; }

/* Layout de dos columnas */
.article-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}
.article-side {
  position: sticky;
  top: 92px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Índice lateral */
.toc {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 16px 14px;
  background: var(--surface);
}
.toc b {
  display: block;
  font-size: 0.71rem;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--txt-dim);
  margin-bottom: 11px;
}
.toc ol {
  margin: 0;
  padding-left: 1.1em;
  list-style: decimal;
  font-size: 0.87rem;
  counter-reset: none;
}
.toc li { margin-bottom: 8px; line-height: 1.4; }
.toc li:last-child { margin-bottom: 0; }
.toc li::marker { color: var(--turq); font-weight: 700; font-size: 0.8em; }
.toc a { color: var(--txt-soft); text-decoration: none; transition: color 0.18s ease; }
.toc a:hover { color: var(--turq); }

/* CTA lateral */
.side-cta {
  border: 1px solid rgba(64, 224, 208, 0.24);
  background: radial-gradient(300px 130px at 80% 0%, rgba(64, 224, 208, 0.13), transparent 70%), rgba(255, 255, 255, 0.03);
  border-radius: 14px;
  padding: 16px;
}
.side-cta b { display: block; font-size: 0.95rem; margin-bottom: 6px; }
.side-cta p { font-size: 0.84rem; color: var(--txt-dim); font-weight: 300; margin: 0 0 12px; line-height: 1.5; }
.side-cta .btn { width: 100%; font-size: 0.88rem; padding: 10px 14px; }

/* Cuerpo del artículo */
.article-body {
  max-width: 70ch;
  font-size: 1.045rem;
  line-height: 1.78;
  color: var(--txt-soft);
  font-weight: 300;
}
.article-body h2 {
  font-size: clamp(1.32rem, 2.6vw, 1.72rem);
  color: #fff;
  margin: 2.4em 0 0.75em;
  scroll-margin-top: 96px;
  letter-spacing: -0.015em;
  line-height: 1.22;
  position: relative;
  padding-left: 16px;
}
.article-body h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.24em;
  bottom: 0.2em;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, #40e0d0, #7a5cff);
}
.article-body h3 {
  font-size: 1.16rem;
  color: #fff;
  margin: 1.9em 0 0.55em;
  scroll-margin-top: 96px;
}
.article-body p { margin: 0 0 1.2em; }
.article-body strong { color: #fff; font-weight: 600; }
.article-body em { color: #d7e8f2; font-style: italic; }
.article-body a {
  color: var(--turq);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(64, 224, 208, 0.35);
  text-decoration-thickness: 1px;
  transition: text-decoration-color 0.18s ease, color 0.18s ease;
}
.article-body a:hover { text-decoration-color: var(--turq); color: #6ff0e2; }
.article-body ul,
.article-body ol {
  margin: 0 0 1.35em;
  padding-left: 1.35em;
  list-style: none;
  counter-reset: item;
}
.article-body ul li,
.article-body ol li {
  margin-bottom: 0.7em;
  position: relative;
  padding-left: 6px;
}
.article-body ul li::before {
  content: "";
  position: absolute;
  left: -1.1em;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--turq);
  box-shadow: 0 0 10px rgba(64, 224, 208, 0.55);
}
.article-body ol li::before {
  counter-increment: item;
  content: counter(item) ".";
  position: absolute;
  left: -1.5em;
  color: var(--turq);
  font-weight: 700;
  font-size: 0.86em;
  top: 0.12em;
}
.article-body blockquote {
  margin: 1.8em 0;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  border-radius: 0 14px 14px 0;
  background: linear-gradient(90deg, rgba(122, 92, 255, 0.09), rgba(255, 255, 255, 0.02));
  color: var(--txt);
  font-weight: 300;
}
.article-body blockquote p:last-child { margin-bottom: 0; }

/* Callout destacado */
.callout {
  margin: 1.9em 0;
  padding: 18px 22px;
  border-radius: 14px;
  border: 1px solid rgba(64, 224, 208, 0.24);
  background: radial-gradient(420px 150px at 8% 0%, rgba(64, 224, 208, 0.11), transparent 70%), rgba(255, 255, 255, 0.035);
  position: relative;
}
.callout b {
  display: block;
  color: var(--turq);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 7px;
}
.callout p { margin: 0; font-size: 0.97rem; color: var(--txt-soft); line-height: 1.62; }

/* Enlace a herramienta */
.tool-link {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 1.8em 0;
  padding: 16px 20px;
  border-radius: 14px;
  border: 1px solid rgba(64, 224, 208, 0.3);
  background: linear-gradient(100deg, rgba(64, 224, 208, 0.1), rgba(122, 92, 255, 0.07));
  text-decoration: none;
  color: var(--txt);
  transition: border-color 0.22s ease, transform 0.22s ease, box-shadow 0.22s ease;
}
.tool-link:hover {
  border-color: rgba(64, 224, 208, 0.55);
  transform: translateX(4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}
.tool-link b { display: block; color: #fff; font-size: 0.98rem; margin-bottom: 2px; }
.tool-link span span { font-size: 0.85rem; color: var(--txt-dim); }
.tool-link::after {
  content: "\2192";
  color: var(--turq);
  margin-left: auto;
  font-size: 1.3rem;
  flex: 0 0 auto;
}

/* Tablas */
.article-body .table-wrap {
  overflow-x: auto;
  margin: 1.8em 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 520px;
}
.article-body th,
.article-body td {
  border-bottom: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}
.article-body tr:last-child td { border-bottom: 0; }
.article-body th {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: sticky;
  top: 0;
}

/* FAQ acordeón */
.faq { margin: 1.6em 0 2em; display: grid; gap: 10px; }
.faq details {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0 18px;
  background: var(--surface);
  overflow: hidden;
  transition: border-color 0.22s ease, background 0.22s ease;
}
.faq details[open] {
  border-color: rgba(64, 224, 208, 0.32);
  background: var(--surface-2);
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  color: #fff;
  list-style: none;
  padding: 15px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  line-height: 1.4;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before {
  content: "+";
  color: var(--turq);
  font-weight: 700;
  font-size: 1.15rem;
  flex: 0 0 auto;
  width: 18px;
  text-align: center;
  transition: transform 0.22s ease;
}
.faq details[open] summary::before { content: "\2212"; }
.faq summary:hover { color: var(--turq); }
.faq details p {
  margin: 0 0 16px;
  padding-left: 30px;
  color: var(--txt-soft);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Relacionados */
.post-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 44px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}
.post-next {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 18px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--surface);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.22s ease, transform 0.22s ease, background 0.22s ease;
}
.post-next:hover {
  border-color: rgba(64, 224, 208, 0.42);
  background: var(--surface-2);
  transform: translateY(-3px);
}
.post-next span {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  color: var(--turq);
  font-weight: 700;
}
.post-next b { font-size: 0.97rem; color: #fff; line-height: 1.34; }
.post-next em { font-style: normal; font-size: 0.8rem; color: var(--txt-dim); }

/* CTA final */
.article-cta {
  margin-top: 34px;
  padding: clamp(24px, 3.4vw, 36px);
  border-radius: 20px;
  border: 1px solid rgba(64, 224, 208, 0.24);
  background: radial-gradient(620px 240px at 88% 0%, rgba(64, 224, 208, 0.14), transparent 62%),
    radial-gradient(500px 200px at 10% 100%, rgba(122, 92, 255, 0.12), transparent 62%),
    rgba(255, 255, 255, 0.03);
  text-align: center;
}
.article-cta h3 { font-size: 1.32rem; margin-bottom: 9px; }
.article-cta p {
  color: var(--txt-soft);
  font-weight: 300;
  max-width: 56ch;
  margin: 0 auto 20px;
  font-size: 0.97rem;
  line-height: 1.6;
}
.article-cta .actions { justify-content: center; margin: 0; }

/* ---------- Responsive ---------- */
@media (max-width: 1020px) {
  .post-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .article-side { position: static; }
  .toc { order: -1; }
  .side-cta { display: none; }
  .post-nav { grid-template-columns: 1fr; }
}
@media (max-width: 780px) {
  .post-grid { grid-template-columns: 1fr; }
  .article-body { font-size: 1.01rem; line-height: 1.72; }
  .blog-teaser { grid-template-columns: 1fr; }
  .article-hero h1 { max-width: none; }
  .toc ol { font-size: 0.84rem; }
}