/* ============================================================
   Blog de iAlfred — hoja de estilos autónoma.
   Deliberadamente independiente del bundle de Tailwind de la SPA:
   esos ficheros llevan hash en el nombre y cambian en cada build,
   así que enlazarlos desde páginas estáticas rompería el blog cada
   vez que se recompila. Replica la identidad visual de la landing
   (azul #2563eb sobre blanco, tipografía Inter).
   ============================================================ */

:root {
  --blue: #2563eb;
  --blue-dark: #1d4ed8;
  --blue-soft: #eff4ff;
  --ink: #1a1a1a;
  --muted: #5b6472;
  --line: #e4e8ef;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: #fff;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--blue);
}

.wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- cabecera ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 15, 30, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(59, 130, 246, 0.25);
}

.nav-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.nav-brand {
  font-weight: 800;
  font-size: 1.15rem;
  color: #fff;
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-brand span {
  color: #60a5fa;
}

.nav-links {
  display: flex;
  gap: 22px;
  align-items: center;
}

.nav-links a {
  color: rgba(203, 213, 225, 0.92);
  text-decoration: none;
  font-size: 0.94rem;
  font-weight: 500;
}

.nav-links a:hover {
  color: #60a5fa;
}

.nav-cta {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff !important;
  padding: 0.6rem 1.15rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.88rem;
  white-space: nowrap;
}

/* ---------- migas ---------- */
.crumbs {
  font-size: 0.84rem;
  color: #8b93a1;
  padding: 30px 0 0;
}

.crumbs a {
  color: var(--muted);
  text-decoration: none;
}

.crumbs a:hover {
  color: var(--blue);
}

.crumbs span {
  margin: 0 6px;
}

/* ---------- índice ---------- */
.hero {
  background: linear-gradient(180deg, var(--blue-soft) 0%, #fff 100%);
  padding: 48px 0 56px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin: 0 0 18px;
}

.hero p {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.7;
  margin: 0 auto;
  max-width: 60ch;
}

.posts {
  display: grid;
  gap: 20px;
  padding: 48px 0 80px;
}

.post {
  display: block;
  padding: 30px 28px;
  border: 1px solid var(--line);
  border-radius: 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s, box-shadow 0.25s, transform 0.25s;
}

.post:hover {
  border-color: #b9ccf7;
  box-shadow: 0 10px 30px rgba(37, 99, 235, 0.09);
  transform: translateY(-3px);
}

.post-date {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--blue);
  font-weight: 600;
}

.post h2 {
  font-size: 1.4rem;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 10px 0 10px;
}

.post p {
  color: var(--muted);
  line-height: 1.65;
  margin: 0 0 12px;
}

.post-more {
  color: var(--blue);
  font-weight: 600;
  font-size: 0.9rem;
}

/* ---------- artículo ---------- */
.article-head {
  padding: 26px 0 40px;
}

.article-head h1 {
  font-size: clamp(1.9rem, 4.4vw, 2.9rem);
  line-height: 1.16;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
}

.article-meta {
  color: #8b93a1;
  font-size: 0.88rem;
  margin: 0;
}

/* El cuerpo viene de un fragmento sin clases: se estila por elemento. */
.body {
  font-size: 1.06rem;
  line-height: 1.8;
  color: #333a45;
  padding-bottom: 20px;
}

.body h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 52px 0 18px;
}

.body h3 {
  font-size: 1.15rem;
  color: var(--ink);
  margin: 34px 0 10px;
}

.body p {
  margin: 0 0 21px;
}

.body strong {
  color: var(--ink);
  font-weight: 600;
}

.body ul {
  margin: 0 0 24px;
  padding-left: 22px;
}

.body li {
  margin-bottom: 11px;
}

.body li::marker {
  color: var(--blue);
}

.body table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 28px;
  font-size: 0.94rem;
}

.body th,
.body td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.body th {
  background: var(--blue-soft);
  font-weight: 600;
}

/* ---------- CTA ---------- */
.cta {
  margin: 56px 0 0;
  padding: 40px 34px;
  background: var(--blue-soft);
  border: 1px solid #d4e0fb;
  border-radius: 18px;
  text-align: center;
}

.cta h2 {
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

.cta p {
  color: var(--muted);
  line-height: 1.7;
  margin: 0 auto 24px;
  max-width: 52ch;
}

.btn {
  display: inline-block;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  padding: 0.95rem 1.9rem;
  border-radius: 999px;
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.32);
}

/* ---------- relacionados ---------- */
.related {
  margin: 64px 0 0;
}

.related h2 {
  font-size: 1.25rem;
  margin: 0 0 18px;
}

.rel {
  display: block;
  padding: 22px 22px;
  border: 1px solid var(--line);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  margin-bottom: 14px;
  transition: border-color 0.25s;
}

.rel:hover {
  border-color: #b9ccf7;
}

.rel h3 {
  font-size: 1.02rem;
  line-height: 1.35;
  margin: 6px 0 6px;
}

.rel p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 0;
}

.rel-kicker {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--blue);
  font-weight: 600;
}

/* ---------- pie ---------- */
.foot {
  margin-top: 80px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  color: #8b93a1;
  font-size: 0.9rem;
  text-align: center;
}

.foot a {
  color: var(--muted);
  text-decoration: none;
  margin: 0 10px;
}

.foot a:hover {
  color: var(--blue);
}

@media (max-width: 720px) {
  .nav-links a:not(.nav-cta) {
    display: none;
  }

  .body {
    font-size: 1rem;
  }

  .body table {
    display: block;
    overflow-x: auto;
  }

  .cta {
    padding: 30px 20px;
  }
}