/* Sitio: estructura, tipografía y barra lateral de proyectos */
:root {
  color-scheme: dark;
  --bg: #111418;
  --surface: #181c21;
  --ink: #e5e9ee;
  --muted: #98a3b1;
  --line: #2a3038;
  --accent: #6ea8ff;
  --accent-ink: #0c1015;
  --code-bg: #0c0f13;
  --code-ink: #dbe2ea;
  --code-key: #7fb2ff;
  --code-com: #7f8a98;
  --sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 400 16px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
img { image-rendering: pixelated; }
a { color: var(--accent); text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.wrap { width: min(1780px, 100% - 48px); margin-inline: auto; }

/* ---- encabezado */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; justify-content: space-between; min-height: 56px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 600; font-size: 1.1rem; letter-spacing: -0.01em; }
.site-header nav { display: flex; gap: 22px; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 0.95rem; padding: 4px 0; border-bottom: 2px solid transparent; }
.site-header nav a:hover { color: var(--ink); border-bottom-color: var(--accent); }

/* ---- cuerpo: contenido y barra lateral */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) clamp(280px, 19vw, 330px); gap: 32px; padding-block: 36px 56px; align-items: start; }
main { min-width: 0; }

.intro { max-width: 70ch; margin-bottom: 24px; }
h1 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 12px; font-weight: 600; }
.lede { margin: 0; color: var(--muted); font-size: 1.05rem; max-width: 66ch; }
h2 { font-size: 1.45rem; letter-spacing: -0.01em; margin: 0 0 16px; font-weight: 600; }
h3 { display: flex; align-items: center; gap: 10px; font-size: 1.02rem; margin: 22px 0 6px; font-weight: 600; }
h3:first-child { margin-top: 0; }
.como p { margin: 0; max-width: 62ch; color: var(--muted); }

.demo-note { margin: 14px 0 0; max-width: 78ch; color: var(--muted); font-size: 0.93rem; }

.como { margin-top: 64px; }
.como-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr); gap: 36px; align-items: start; }
.code { margin: 0; background: var(--code-bg); border-radius: 4px; overflow: hidden; border: 1px solid #000; }
.code figcaption { font: 400 0.78rem var(--mono); color: var(--code-com); padding: 9px 14px; border-bottom: 1px solid #262c34; }
.code pre { margin: 0; padding: 14px 16px 16px; overflow-x: auto; font: 400 0.84rem/1.65 var(--mono); color: var(--code-ink); }
.code .k { color: var(--code-key); }
.code .c { color: var(--code-com); }

.autores { margin-top: 64px; }
.people { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.people li { display: flex; gap: 16px; align-items: center; background: var(--surface); border: 1px solid var(--line); padding: 14px; border-radius: 4px; }
.people img { image-rendering: auto; border-radius: 2px; border: 1px solid var(--line); }
.people strong { display: block; font-weight: 600; }
.people span { display: block; color: var(--muted); font-size: 0.9rem; }
.people a { font-size: 0.92rem; }

/* ---- barra lateral de proyectos y auspicios */
.rail { position: sticky; top: 76px; }
.rail-inner { background: var(--surface); border: 1px solid var(--line); border-radius: 4px; padding: 18px; }
.rail h2 { display: flex; align-items: center; gap: 8px; font-size: 1.1rem; margin: 0 0 8px; }
.rail p { margin: 0 0 14px; font-size: 0.9rem; color: var(--muted); }

/* ---- pie de página */
.site-footer { background: var(--surface); border-top: 1px solid var(--line); padding-block: 28px 36px; }
.footer-row { display: grid; grid-template-columns: 1.4fr 1fr; gap: 12px 40px; }
.footer-row p { margin: 4px 0 0; color: var(--muted); font-size: 0.92rem; }
.footer-row ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 0.93rem; }
.footer-row .legal { grid-column: 1 / -1; font-size: 0.8rem; margin-top: 10px; padding-top: 14px; border-top: 1px solid var(--line); }

@media (max-width: 1100px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .rail { position: static; }
}
@media (max-width: 760px) {
  .como-grid, .footer-row { grid-template-columns: 1fr; }
  .site-header nav { gap: 14px; font-size: 0.9rem; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media (max-width: 560px) {
  .header-row { flex-wrap: wrap; padding-block: 8px; }
  .site-header nav { width: 100%; white-space: nowrap; overflow-x: auto; }
}

/* ---- banner de PexRead (primer espacio de la barra lateral) */
.ad-card { margin-bottom: 0; border: 1px solid rgba(16, 185, 129, 0.35); border-radius: 8px; padding: 10px; display: grid; gap: 8px;
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.06), transparent 60%); box-shadow: 0 0 24px rgba(16, 185, 129, 0.08); }
.ad-card__tag { font-size: 0.85rem; color: #34d399; font-weight: 500; }
.ad-card__banner { display: block; border-radius: 8px; overflow: hidden; line-height: 0; }
.ad-card__banner video { width: 100%; aspect-ratio: 16 / 9; display: block; image-rendering: auto; }
.ad-card__banner:focus-visible, .ad-card__cta:focus-visible { outline: 2px solid #34d399; outline-offset: 2px; }
.ad-card__foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; font-size: 0.85rem; color: var(--ink); }
.ad-card__cta { background: #10b981; color: #07080c; font-weight: 600; font-size: 0.85rem; padding: 5px 12px; border-radius: 6px; text-decoration: none; }
.ad-card__cta:hover { background: #34d399; }
@media (prefers-reduced-motion: reduce) {
  .ad-card__banner video { display: none; }
  .ad-card__banner { aspect-ratio: 16 / 9; background: url("../assets/ads/pexread/pexread-banner-poster.png") center / cover; }
}
@media (max-width: 1100px) {
  .ad-card { grid-column: 1 / -1; }
}

/* ---- autores con ícono pixelado */
.people img.pixel { image-rendering: pixelated; background: var(--bg); padding: 10px; }

/* cabecera del banner con botón para ocultarlo */
.ad-card__head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.ad-card__toggle { width: 24px; height: 24px; display: grid; place-items: center; background: transparent; color: var(--muted); border: 1px solid var(--line); border-radius: 4px; cursor: pointer; font: 500 1rem/1 var(--sans); padding: 0; }
.ad-card__toggle:hover { color: var(--ink); border-color: var(--muted); }
.ad-card__toggle:focus-visible { outline: 2px solid #34d399; outline-offset: 2px; }
.ad-card.is-collapsed .ad-card__banner, .ad-card.is-collapsed .ad-card__foot { display: none; }
.ad-card.is-collapsed { padding: 8px 10px; }