/* ==========================================================================
   Layout: contenedor, cabecera, secciones, footer
   ========================================================================== */
.container {
  width: min(100% - 2.5rem, var(--maxw));
  margin-inline: auto;
}

/* ---- Cabecera sticky ---- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}
.site-header__inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}

.brand {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--font-mono); font-weight: 700; color: var(--text);
}
.brand:hover { text-decoration: none; }
.brand__prompt {
  display: grid; place-items: center; width: 30px; height: 30px;
  border-radius: 8px; border: 1px solid var(--border-strong);
  color: var(--accent); background: var(--surface); font-size: .8rem;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.brand:hover .brand__prompt { border-color: var(--accent); box-shadow: var(--glow); }
.brand__dim { color: var(--text-dim); font-weight: 500; }

.nav {
  display: flex; gap: .25rem; margin-left: auto;
  font-family: var(--font-mono); font-size: .85rem;
  overflow-x: auto; scrollbar-width: none;
}
.nav::-webkit-scrollbar { display: none; }
.nav a {
  position: relative; padding: .45rem .7rem; border-radius: var(--radius-sm);
  color: var(--text-muted); white-space: nowrap;
  transition: color var(--t-fast), background var(--t-fast);
}
.nav a::before { content: "./"; color: var(--text-dim); transition: color var(--t-fast); }
.nav a:hover { color: var(--text); background: var(--surface); text-decoration: none; }
.nav a:hover::before,
.nav a[aria-current="true"]::before { color: var(--accent); }
.nav a[aria-current="true"] { color: var(--accent); background: color-mix(in srgb, var(--accent) 10%, transparent); }

@media (max-width: 720px) {
  .brand__name { display: none; }
  .nav a::before { content: none; }
}

/* ---- Secciones ---- */
.section { padding-block: clamp(3.5rem, 8vw, 6rem); }

.section__head { margin-bottom: 2.25rem; max-width: 62ch; }
.eyebrow {
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .04em;
  color: var(--accent); margin-bottom: .6rem;
}
.section__head h2 { font-size: clamp(1.7rem, 3.4vw, 2.3rem); }
.section__lead { margin-top: .7rem; color: var(--text-muted); }

/* Reveal on scroll */
.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.js .reveal.is-visible { opacity: 1; transform: none; }

/* ---- Footer ---- */
.site-footer {
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, color-mix(in srgb, var(--bg-elev) 85%, transparent));
  padding-block: clamp(3rem, 7vw, 5rem) 2rem;
}