/* b4n1com — base stylesheet (HOTFIX v0.2)
   Self-contained, zero JS deps, no external CDN.
   Served by b4n1-suite from dev/static/css/style.css.
   Selectors aligned to private-apps/b4n1com/dev/templates/header.html.
*/

* { box-sizing: border-box; }

:root {
  --b4-bg: #0b0f17;
  --b4-bg-soft: #111827;
  --b4-bg-soft-2: #1f2937;
  --b4-fg: #e5e7eb;
  --b4-muted: #94a3b8;
  --b4-accent: #38bdf8;
  --b4-accent-2: #a78bfa;
  --b4-border: rgba(148, 163, 184, 0.18);
  --b4-radius: 10px;
  --b4-container: 1120px;
  --b4-font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
             "Helvetica Neue", Arial, sans-serif;
  --b4-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --text-secondary: var(--b4-muted);
  --card-bg: var(--b4-bg-soft);
  --accent-primary: var(--b4-accent);
  --dark-bg: var(--b4-bg);
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--b4-bg);
  color: var(--b4-fg);
  font-family: var(--b4-font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

a { color: var(--b4-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Accessibility: focus rings on every interactive element */
a:focus-visible, button:focus-visible, .btn:focus-visible, .nav-link:focus-visible {
  outline: 2px solid var(--b4-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

h1, h2, h3, h4 {
  margin: 0 0 0.6em;
  line-height: 1.25;
  color: #fff;
}
h1 { font-size: 2.2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.15rem; }

p { margin: 0 0 1em; color: var(--b4-fg); }

code, pre {
  font-family: var(--b4-mono);
  background: var(--b4-bg-soft);
  border: 1px solid var(--b4-border);
  border-radius: 6px;
}
code { padding: 0.15em 0.4em; font-size: 0.92em; }
pre {
  padding: 1rem;
  overflow: auto;
  line-height: 1.45;
}
pre code { background: transparent; border: 0; padding: 0; }

.container {
  max-width: var(--b4-container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header / nav (matches <header><nav> structure) ---------- */

header, header.site-header {
  border-bottom: 1px solid var(--b4-border);
  background: rgba(11, 15, 23, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 50;
}
header .container {
  height: 64px;
  display: flex;
  align-items: center;
}
header nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 1rem;
}

.logo {
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.04em;
  font-size: 1.15rem;
  text-decoration: none;
}
.logo img.logo-img {
  height: 1.6rem;
  width: auto;
  vertical-align: middle;
  border-radius: 4px;
  display: inline-block;
}
.logo:hover { text-decoration: none; color: var(--b4-accent); }
.logo .highlight { color: var(--b4-accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.nav-link {
  color: var(--b4-muted);
  font-weight: 500;
  transition: color 120ms ease;
}
.nav-link:hover { color: #fff; text-decoration: none; }

.nav-actions { display: flex; align-items: center; gap: 0.85rem; }

/* ---------- Buttons (.btn + chained .btn-primary / .btn-outline) ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--b4-radius);
  border: 1px solid var(--b4-border);
  color: var(--b4-fg);
  background: transparent;
  font: inherit;
  cursor: pointer;
  transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
  text-decoration: none;
}
.btn:hover { background: var(--b4-bg-soft-2); text-decoration: none; transform: translateY(-1px); }

.btn.btn-primary, .btn.primary {
  background: linear-gradient(135deg, var(--b4-accent), var(--b4-accent-2));
  border-color: transparent;
  color: #0b0f17;
  font-weight: 600;
}
.btn.btn-primary:hover, .btn.primary:hover { color: #0b0f17; opacity: 0.92; }

.btn.btn-outline, .btn-outline {
  background: transparent;
  border: 1px solid var(--b4-border);
  color: var(--b4-fg);
}
.btn.btn-outline:hover { background: var(--b4-bg-soft); }

/* ---------- Hero / sections ---------- */

.hero {
  padding: 4rem 0 2.5rem;
  text-align: center;
}
.hero .badge {
  display: inline-block;
  padding: 0.3em 0.8em;
  border: 1px solid var(--b4-border);
  border-radius: 999px;
  color: var(--b4-muted);
  font-size: 0.85rem;
  margin-bottom: 1rem;
}
.hero h1 {
  background: linear-gradient(120deg, #fff, var(--b4-accent) 60%, var(--b4-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-size: 2.6rem;
}
.hero p { max-width: 680px; margin: 0.75rem auto 1.5rem; color: var(--b4-muted); }

/* ---------- Cards / grids ---------- */

.grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  margin: 2rem 0;
}
.card {
  background: var(--b4-bg-soft);
  border: 1px solid var(--b4-border);
  border-radius: 16px;
  padding: 1.5rem;
  overflow: hidden;
  transition: transform 0.25s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(56, 189, 248, 0.12);
  border-color: rgba(56, 189, 248, 0.25);
}
.card h3 { margin-top: 0; }
.card h3 a {
  color: #fff;
  transition: color 0.2s ease;
}
.card:hover h3 a {
  color: var(--b4-accent);
}
.card-body {
  padding: 1.25rem 1.5rem 1.5rem;
}

/* ---------- Placeholder image fallback (templates use .placeholder-img) ---------- */

.placeholder-img {
  background: linear-gradient(135deg, var(--b4-bg-soft), var(--b4-bg-soft-2));
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0;
  color: var(--b4-muted);
  font-size: 2.5rem;
}

/* ---------- Blog list / article ---------- */

.post-list { list-style: none; padding: 0; margin: 1.5rem 0; }
.post-list li {
  border-bottom: 1px solid var(--b4-border);
  padding: 1rem 0;
}
.post-list .post-meta {
  color: var(--b4-muted);
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}
.post-list a {
  font-weight: 600;
  font-size: 1.05rem;
}

article.blog-post {
  max-width: 760px;
  margin: 0 auto;
  padding: 2.5rem 0;
}
article.blog-post header { border-bottom: 1px solid var(--b4-border); padding-bottom: 1rem; margin-bottom: 1.5rem; }

/* ---------- Footer ---------- */

.sponsor-card {
  margin-bottom: 1.5rem;
}
.sponsor-card__content {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  max-width: 760px;
  margin: 0 auto;
  padding: 1.25rem 1.5rem;
  background: linear-gradient(135deg, var(--b4-bg-soft), var(--b4-bg-soft-2));
  border: 1px solid var(--b4-border);
  border-radius: var(--b4-radius);
  text-align: left;
}
.sponsor-card__content h2 { margin: 0 0 0.25rem; font-size: 1.15rem; }
.sponsor-card__content p { margin: 0; color: var(--b4-muted); font-size: 0.9rem; }
.sponsor-card__heart { color: #fb7185; font-size: 1.5rem; }
.sponsor-card__content .btn { flex-shrink: 0; }

footer, footer.site-footer {
  border-top: 1px solid var(--b4-border);
  color: var(--b4-muted);
  font-size: 0.9rem;
  margin-top: auto;
  padding: 1.5rem 0;
  text-align: center;
}

/* ---------- Forms (search bar in 404) ---------- */

form.search {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
  max-width: 520px;
}
form.search input[type="text"] {
  flex: 1;
  padding: 0.55rem 0.8rem;
  background: var(--b4-bg-soft);
  color: var(--b4-fg);
  border: 1px solid var(--b4-border);
  border-radius: 8px;
  font: inherit;
}
form.search input[type="text"]:focus-visible {
  outline: none;
  border-color: var(--b4-accent);
}

/* ---------- Card grid (templates use .card-grid, NOT .grid) ---------- */

.card-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  margin: 2rem 0;
}
.card-grid .card {
  display: flex;
  flex-direction: column;
}
.card-grid .card .card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.card-grid .card h3 { margin-top: 0; }

/* ---------- Language modal ---------- */

.modal {
  display: none;
  position: fixed;
  z-index: 9999;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  align-items: center;
  justify-content: center;
}
.modal.open {
  display: flex;
}
.modal-content {
  background: var(--b4-bg-soft);
  border: 1px solid var(--b4-border);
  border-radius: 12px;
  padding: 1.5rem;
  max-width: 420px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.modal-header h3 {
  margin: 0;
  font-size: 1.1rem;
}
.close {
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--b4-muted);
  line-height: 1;
}
.close:hover {
  color: #fff;
}
#languageSearch {
  width: 100%;
  padding: 0.55rem 0.8rem;
  margin-bottom: 1rem;
  background: var(--b4-bg);
  color: var(--b4-fg);
  border: 1px solid var(--b4-border);
  border-radius: 8px;
  font: inherit;
  box-sizing: border-box;
}
#languageSearch:focus-visible {
  outline: none;
  border-color: var(--b4-accent);
}
#languageList {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.language-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--b4-border);
  border-radius: 8px;
  background: transparent;
  color: var(--b4-fg);
  cursor: pointer;
  font: inherit;
  text-align: left;
  transition: background 120ms ease, border-color 120ms ease;
}
.language-item:hover {
  background: var(--b4-bg-soft-2);
  border-color: var(--b4-accent);
}
.language-flag { font-size: 1.4rem; }
.language-label { font-weight: 600; flex: 1; }
.language-native { color: var(--b4-muted); font-size: 0.9rem; }

/* ---------- Utility classes ---------- */

.highlight { color: var(--b4-accent); }
.text-center { text-align: center; }
.mb-4 { margin-bottom: 1.5rem; }
.mt-4 { margin-top: 1.5rem; }
.btn-text {
  color: var(--b4-accent);
  font-weight: 600;
  text-decoration: none;
}
.btn-text:hover { text-decoration: underline; }

/* ---------- Latest posts section ---------- */

.latest-posts, .projects, .simple-contact {
  padding: 4rem 0;
}
.simple-contact {
  padding-bottom: 5rem;
}
.latest-posts h2, .projects h2, .simple-contact h2 {
  margin-bottom: 2rem;
}

/* ---------- Table styles (for markdown tables) ---------- */

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--b4-border);
}
.prose thead {
  background: linear-gradient(135deg, var(--b4-bg-soft-2), var(--b4-bg-soft));
}
.prose th {
  padding: 0.85rem 1rem;
  text-align: left;
  font-weight: 700;
  color: #fff;
  border-bottom: 2px solid var(--b4-accent);
  letter-spacing: 0.02em;
}
.prose td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--b4-border);
  color: var(--b4-fg);
}
.prose tr:last-child td {
  border-bottom: none;
}
.prose tbody tr {
  transition: background 0.15s ease;
}
.prose tbody tr:hover {
  background: rgba(56, 189, 248, 0.04);
}
.prose tbody tr:nth-child(even) {
  background: rgba(255, 255, 255, 0.02);
}
.prose tbody tr:nth-child(even):hover {
  background: rgba(56, 189, 248, 0.06);
}

/* ---------- Prose/Article content styling (markdown output) ---------- */

#post-content.prose {
  line-height: 1.8;
}
#post-content h1,
#post-content h2,
#post-content h3,
#post-content h4 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
  color: #fff;
  scroll-margin-top: 100px; /* account for sticky header + ToC */
}
#post-content h1 { font-size: 2rem; font-weight: 800; }
#post-content h2 { 
  font-size: 1.6rem; 
  font-weight: 700; 
  border-bottom: 1px solid var(--b4-border);
  padding-bottom: 0.5rem;
}
#post-content h3 { 
  font-size: 1.25rem; 
  font-weight: 600; 
  color: var(--b4-accent);
}
#post-content h4 { font-size: 1.1rem; font-weight: 600; }
#post-content p { margin: 0 0 1.2em; color: var(--b4-fg); }
#post-content ul, #post-content ol { 
  margin: 1em 0; 
  padding-left: 1.5rem; 
}
#post-content li { margin: 0.4em 0; }
#post-content li::marker { color: var(--b4-accent); }
#post-content code { 
  background: var(--b4-bg-soft); 
  padding: 0.15em 0.4em; 
  border-radius: 4px; 
  font-size: 0.9em; 
  border: 1px solid var(--b4-border);
}
#post-content pre { 
  background: var(--b4-bg-soft-2); 
  border: 1px solid var(--b4-border); 
  border-radius: 8px; 
  padding: 1rem; 
  overflow: auto; 
  margin: 1.5rem 0;
  line-height: 1.5;
}
#post-content pre code { 
  background: transparent; 
  border: 0; 
  padding: 0; 
  font-size: 0.88rem; 
}

/* Inline citations [N] — small and unobtrusive */
#post-content .post-cite {
  font-size: 0.65em;
  font-weight: 600;
  color: var(--b4-accent);
  opacity: 0.75;
  vertical-align: super;
  line-height: 0;
  margin: 0 0.05em;
}

/* Sources section — compact and collapsed by default */
#post-content details.post-sources {
  margin-top: 2.5rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--b4-border);
  border-radius: 10px;
  background: var(--b4-bg-soft);
}
#post-content details.post-sources summary {
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--b4-fg-soft, #9aa4b2);
  user-select: none;
  list-style: none;
}
#post-content details.post-sources summary::-webkit-details-marker {
  display: none;
}
#post-content details.post-sources summary::before {
  content: "▸ ";
  color: var(--b4-accent);
}
#post-content details.post-sources[open] summary::before {
  content: "▾ ";
}
#post-content details.post-sources .post-sources-list {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
}
#post-content details.post-sources .post-sources-list li {
  font-size: 0.78rem;
  line-height: 1.5;
  margin: 0.35em 0;
  color: var(--b4-fg-soft, #9aa4b2);
  overflow-wrap: anywhere;
}
#post-content details.post-sources .post-sources-list li a {
  color: var(--b4-fg-soft, #9aa4b2);
  text-decoration: none;
}
#post-content details.post-sources .post-sources-list li a:hover {
  color: var(--b4-accent);
  text-decoration: underline;
}
#post-content blockquote { 
  border-left: 4px solid var(--b4-accent); 
  padding-left: 1rem; 
  margin: 1.5rem 0; 
  color: var(--b4-muted);
  font-style: italic;
  background: rgba(56, 189, 248, 0.03);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.5rem;
}
#post-content hr { 
  border: 0; 
  border-top: 1px solid var(--b4-border); 
  margin: 2.5rem 0; 
}
#post-content a { 
  color: var(--b4-accent); 
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}
#post-content a:hover { 
  color: var(--b4-accent-2);
  border-bottom-color: var(--b4-accent-2);
}
#post-content img { 
  border-radius: 8px; 
  margin: 1.5rem 0; 
}

/* ---------- ToC sidebar ---------- */

.toc-sidebar {
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  padding: 1.5rem;
  background: rgba(17,17,27,0.8);
  border: 1px solid #2d2d3d;
  border-radius: 12px;
  backdrop-filter: blur(8px);
}
.toc-sidebar ul { list-style: none; padding: 0; margin: 0; }
.toc-sidebar li { margin: 0.25rem 0; }
.toc-sidebar a {
  display: block;
  padding: 0.25rem 0;
  color: #888;
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
  border-bottom: 1px solid transparent;
}
.toc-sidebar a:hover { color: #60a5fa; border-bottom-color: #60a5fa; }

/* ---------- Animations ---------- */

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Responsive ---------- */

/* ---------- Responsive Mobile Navigation (replaces the legacy flex-wrap rule above) ---------- */

header nav.main-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-menu {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex: 1;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
  z-index: 60;
  width: 40px;
  height: 40px;
  position: relative;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--b4-accent);
  border-radius: 4px;
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--b4-fg);
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: background 0.2s ease;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background: var(--b4-fg);
  left: 0;
  transition: transform 0.2s ease, top 0.2s ease, bottom 0.2s ease;
}
.hamburger::before { top: -6px; }
.hamburger::after  { bottom: -6px; }

/* Hamburger Active (X) State */
.nav-toggle[aria-expanded="true"] .hamburger { background: transparent; }
.nav-toggle[aria-expanded="true"] .hamburger::before {
  top: 0;
  transform: rotate(45deg);
}
.hero-title {
  font-size: clamp(1.85rem, 5.5vw, 3.75rem);
  line-height: 1.15;
  word-wrap: break-word;
  overflow-wrap: anywhere;
  hyphens: auto;
}

@media (max-width: 767px) {
  .hero-title {
    font-size: clamp(1.4rem, 6.2vw, 2.2rem);
    padding: 0 0.25rem;
  }

  .nav-toggle { display: block; }

  .nav-menu {
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    height: 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    background: rgba(11, 15, 23, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--b4-border);
    overflow: hidden;
    opacity: 0;
    pointer-events: none;
    gap: 0;
    transition: height 0.2s cubic-bezier(0.4, 0, 0.2, 1),
                opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .nav-menu.open {
    height: calc(100vh - 64px);
    opacity: 1;
    pointer-events: all;
    overflow-y: auto;
  }

  /* Centrar el contenido del menú abierto en vez de pegarlo arriba.
     Los márgenes automáticos centran el bloque completo y, si el
     contenido excede la pantalla, el scroll sigue funcionando. */
  .nav-menu.open .nav-links { margin-top: auto; }
  .nav-menu.open .nav-actions { margin-bottom: auto; }

  .nav-menu .nav-links,
  .nav-menu .nav-actions {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 1.5rem;
    gap: 1.5rem;
  }

  .nav-menu .nav-actions {
    border-top: 1px solid var(--b4-border);
    padding-top: 1.5rem;
  }

  .nav-link {
    font-size: 1.25rem;
    display: block;
    width: 100%;
  }

  .nav-actions .btn { width: 100%; justify-content: center; }
}

@media (max-width: 600px) {
  .sponsor-card__content { flex-direction: column; text-align: center; }
  .sponsor-card__content .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .nav-menu,
  .hamburger,
  .hamburger::before,
  .hamburger::after { transition: none !important; }
}

/* === B4N1 paso 2: local utility layer (replaces Tailwind/FA/Google Fonts CDN) === */
:root { --b4-font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
.icon { width: 1em; height: 1em; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; display: inline-block; vertical-align: middle; }
.icon-2x { font-size: 2em; }
.icon-4x { font-size: 4em; }
.py-12 { padding-top: 3rem; padding-bottom: 3rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-12 { padding-left: 3rem; padding-right: 3rem; }
.py-4 { padding-top: 1rem; padding-bottom: 1rem; }
.p-12 { padding: 3rem; }
.max-w-6xl { max-width: 72rem; }
.max-w-none { max-width: none; }
.mx-auto { margin-left: auto; margin-right: auto; }
.w-full { width: 100%; }
.h-auto { height: auto; }
.w-1 { width: 0.25rem; }
.h-1 { height: 0.25rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-10 { margin-bottom: 2.5rem; }
.mb-12 { margin-bottom: 3rem; }
.mb-16 { margin-bottom: 4rem; }
.my-16 { margin-top: 4rem; margin-bottom: 4rem; }
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.gap-6 { gap: 1.5rem; }
.gap-12 { gap: 3rem; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-2xl { font-size: 1.5rem; }
.text-4xl { font-size: 2.25rem; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }
.leading-tight { line-height: 1.25; }
.text-gray-400 { color: var(--b4-muted); }
.bg-gray-600 { background-color: #4b5563; }
.bg-gray-900\/50 { background-color: rgba(17, 24, 39, 0.5); }
.rounded-full { border-radius: 9999px; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-2xl { border-radius: 1rem; }
.border { border-width: 1px; border-style: solid; }
.border-gray-800 { border-color: var(--b4-border); }
.shadow-2xl { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25); }
.shadow-black\/40 { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4); }
@media (min-width: 768px) {
  .md\:text-base { font-size: 1rem; }
  .md\:text-5xl { font-size: 3rem; }
}
@media (min-width: 1024px) {
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:col-span-3 { grid-column: span 3 / span 3; }
  .lg\:col-span-4 { grid-column: span 4 / span 4; }
}

/* ---------- Callout blockquotes (💡 Key Takeaway / ⚠️ Architectural Risk) ---------- */
#post-content blockquote {
  border-left: 4px solid var(--b4-accent);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  color: var(--b4-fg);
  font-style: normal;
  background: rgba(56, 189, 248, 0.05);
  border-radius: 0 10px 10px 0;
}
#post-content blockquote p {
  margin: 0;
  color: inherit;
  line-height: 1.6;
}
#post-content blockquote strong {
  color: #fff;
  font-weight: 700;
}
/* Key Takeaway (💡) */
#post-content blockquote:has(strong:contains("Key Takeaway")),
#post-content blockquote:has(strong:contains("Key takeaway")) {
  border-left-color: #22c55e;
  background: rgba(34, 197, 94, 0.08);
}
/* Architectural Risk (⚠️) */
#post-content blockquote:has(strong:contains("Architectural Risk")),
#post-content blockquote:has(strong:contains("Warning")),
#post-content blockquote:has(strong:contains("⚠️")) {
  border-left-color: #f97316;
  background: rgba(249, 115, 22, 0.08);
}
/* Generic callout styling */
#post-content blockquote > p:first-child::before {
  content: none;
}