/* ============================================================
   n8n · Automatización de procesos — sistema de diseño
   Marca n8n: coral (#ea4b71) sobre dark. Tipografía moderna.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Marca n8n */
  --coral: #ea4b71;
  --coral-bright: #ff6b8a;
  --coral-soft: rgba(234, 75, 113, .14);
  --coral-line: rgba(234, 75, 113, .32);

  /* Acentos temáticos */
  --violet: #8b5cf6;     /* IA / agentes */
  --violet-soft: rgba(139, 92, 246, .14);
  --teal: #2dd4bf;       /* datos / flujo */
  --teal-soft: rgba(45, 212, 191, .12);
  --amber: #fbbf24;      /* advertencias / notas */
  --amber-soft: rgba(251, 191, 36, .12);

  /* Superficies (dark) */
  --bg: #0b0b10;
  --bg-2: #111118;
  --surface: rgba(255, 255, 255, .03);
  --surface-2: rgba(255, 255, 255, .05);
  --border: rgba(255, 255, 255, .09);
  --border-strong: rgba(255, 255, 255, .16);

  /* Texto */
  --text: #ecedf3;
  --text-secondary: #b6b8c6;
  --text-muted: #7c7f92;

  /* Tipografía */
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1080px;
  --shadow: 0 20px 60px -20px rgba(0, 0, 0, .6);
}

[data-theme="light"] {
  --bg: #f7f7fb;
  --bg-2: #ffffff;
  --surface: rgba(10, 10, 20, .025);
  --surface-2: rgba(10, 10, 20, .045);
  --border: rgba(10, 10, 20, .1);
  --border-strong: rgba(10, 10, 20, .18);
  --text: #16161d;
  --text-secondary: #45485a;
  --text-muted: #74778a;
  --coral-soft: rgba(234, 75, 113, .1);
  --shadow: 0 20px 50px -24px rgba(20, 20, 40, .25);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* Fondo decorativo: grilla + glow coral */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(700px 500px at 78% -8%, var(--coral-soft), transparent 60%),
    radial-gradient(600px 500px at 12% 8%, var(--violet-soft), transparent 60%);
  pointer-events: none;
}
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 90% 60% at 50% 0%, #000 25%, transparent 75%);
  opacity: .5;
  pointer-events: none;
}

::selection { background: var(--coral); color: #fff; }

/* ---------- Topbar ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px clamp(16px, 4vw, 40px);
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -.02em;
}
.nav-logo .mark {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--coral), var(--coral-bright));
  color: #fff;
  font-weight: 700;
  font-size: .92rem;
  box-shadow: 0 6px 18px -6px var(--coral);
}
.nav-logo .mark::before { content: 'n8n'; font-family: var(--font-mono); font-size: .72rem; }
.nav-spacer { flex: 1; }
.nav a.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: .9rem;
  font-weight: 500;
  padding: 6px 2px;
  transition: color .2s;
}
.nav a.nav-link:hover { color: var(--text); }
.nav-pill {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--coral-bright);
  padding: 5px 11px;
  border: 1px solid var(--coral-line);
  border-radius: 999px;
  background: var(--coral-soft);
  white-space: nowrap;
}
.icon-btn {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  transition: border-color .2s, background .2s;
}
.icon-btn:hover { border-color: var(--border-strong); background: var(--surface-2); }
@media (max-width: 720px) { .nav-link { display: none; } }

/* ---------- Layout ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(16px, 4vw, 32px); }
.wide { max-width: 1200px; }

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: clamp(54px, 9vw, 96px) clamp(16px, 4vw, 32px) clamp(30px, 5vw, 54px);
  max-width: 860px;
  margin: 0 auto;
}
.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--coral-bright);
  padding: 6px 13px;
  border: 1px solid var(--coral-line);
  border-radius: 999px;
  background: var(--coral-soft);
  margin-bottom: 22px;
}
.kicker .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--coral); box-shadow: 0 0 10px var(--coral); }
.kicker.violet { color: var(--violet); border-color: rgba(139,92,246,.34); background: var(--violet-soft); }
.kicker.violet .dot { background: var(--violet); box-shadow: 0 0 10px var(--violet); }
.kicker.teal { color: var(--teal); border-color: rgba(45,212,191,.34); background: var(--teal-soft); }
.kicker.teal .dot { background: var(--teal); box-shadow: 0 0 10px var(--teal); }

h1 {
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 6.5vw, 4rem);
  line-height: 1.04;
  letter-spacing: -.03em;
  font-weight: 700;
  margin-bottom: 20px;
}
.grad {
  background: linear-gradient(110deg, var(--coral) 10%, var(--coral-bright) 50%, var(--violet) 110%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero p.lead, .lead {
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}
.hero .actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 30px; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: .96rem;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 12px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s, box-shadow .2s, background .2s, border-color .2s;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--coral), var(--coral-bright));
  color: #fff;
  box-shadow: 0 10px 28px -10px var(--coral);
}
.btn-primary:hover { box-shadow: 0 14px 34px -8px var(--coral); transform: translateY(-2px); }
.btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { background: var(--surface-2); border-color: var(--coral-line); }

/* ---------- Tipografía de contenido ---------- */
.prose { max-width: 760px; margin: 0 auto; }
.prose h2, h2.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.3rem);
  letter-spacing: -.02em;
  line-height: 1.15;
  margin: 56px 0 14px;
  scroll-margin-top: 90px;
}
.prose h3 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.6vw, 1.5rem);
  letter-spacing: -.01em;
  margin: 36px 0 10px;
}
.prose p { color: var(--text-secondary); margin: 14px 0; }
.prose strong { color: var(--text); font-weight: 600; }
.prose em { color: var(--coral-bright); font-style: normal; font-weight: 500; }
.prose a { color: var(--coral-bright); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.prose ul, .prose ol { color: var(--text-secondary); margin: 14px 0 14px 4px; padding-left: 22px; }
.prose li { margin: 8px 0; }
.prose li::marker { color: var(--coral); }
.prose code:not(pre code) {
  font-family: var(--font-mono);
  font-size: .86em;
  background: var(--coral-soft);
  color: var(--coral-bright);
  padding: 2px 6px;
  border-radius: 6px;
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: .76rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-bottom: 6px;
}

/* ---------- Cards / grid ---------- */
.grid { display: grid; gap: 18px; margin: 26px 0; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 800px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  display: block;
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  text-decoration: none;
  color: inherit;
  transition: transform .2s, border-color .2s, background .2s;
  overflow: hidden;
}
a.card:hover { transform: translateY(-3px); border-color: var(--coral-line); background: var(--surface-2); }
a.card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: radial-gradient(400px 200px at var(--mx, 50%) 0%, var(--coral-soft), transparent 70%);
  opacity: 0;
  transition: opacity .3s;
  pointer-events: none;
}
a.card:hover::after { opacity: 1; }
.card .num {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--coral-bright);
  text-transform: uppercase;
}
.card h3 { font-family: var(--font-display); font-size: 1.18rem; margin: 8px 0 6px; letter-spacing: -.01em; }
.card p { color: var(--text-secondary); font-size: .94rem; margin: 0; }
.card .meta {
  display: flex; align-items: center; gap: 10px;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: .74rem;
  color: var(--text-muted);
}
/* Módulo separador */
.module-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-left: 3px solid var(--coral);
  padding: 7px 14px;
  border-radius: 8px;
  margin: 40px 0 8px;
}

/* ---------- Callouts ---------- */
.callout {
  border: 1px solid var(--border);
  border-left: 3px solid var(--coral);
  background: var(--coral-soft);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  margin: 22px 0;
}
.callout p { margin: 0; color: var(--text-secondary); }
.callout strong { color: var(--text); }
.callout.violet { border-left-color: var(--violet); background: var(--violet-soft); }
.callout.teal { border-left-color: var(--teal); background: var(--teal-soft); }
.callout.amber { border-left-color: var(--amber); background: var(--amber-soft); }
.callout .label {
  display: block;
  font-family: var(--font-mono);
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 5px;
  color: var(--text);
  font-weight: 600;
}

/* ---------- Código / expresiones ---------- */
pre {
  background: #0a0a0f;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 18px;
  overflow-x: auto;
  margin: 18px 0;
  font-family: var(--font-mono);
  font-size: .86rem;
  line-height: 1.6;
}
[data-theme="light"] pre { background: #15151c; }
pre code { color: #e3e4ee; }
.tok-key { color: var(--coral-bright); }
.tok-str { color: var(--teal); }
.tok-num { color: var(--amber); }
.tok-com { color: var(--text-muted); font-style: italic; }
.tok-fn { color: var(--violet); }

/* ---------- n8n: mock del canvas de nodos ---------- */
.flow {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  padding: 26px 18px;
  margin: 26px 0;
  background:
    radial-gradient(circle at 1px 1px, var(--border) 1px, transparent 0) 0 0 / 22px 22px,
    var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
}
.node {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 132px;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  padding: 12px 14px;
  position: relative;
  flex-shrink: 0;
}
.node .node-ico {
  width: 30px; height: 30px;
  border-radius: 8px;
  display: grid; place-items: center;
  font-size: .95rem;
  margin-bottom: 4px;
  background: var(--coral-soft);
  border: 1px solid var(--coral-line);
}
.node .node-name { font-weight: 600; font-size: .88rem; line-height: 1.2; }
.node .node-sub { font-family: var(--font-mono); font-size: .68rem; color: var(--text-muted); }
.node.trigger { border-left: 3px solid var(--coral); }
.node.trigger .node-ico { background: var(--coral-soft); border-color: var(--coral-line); }
.node.logic .node-ico { background: var(--amber-soft); border-color: rgba(251,191,36,.3); }
.node.ai { border-left: 3px solid var(--violet); }
.node.ai .node-ico { background: var(--violet-soft); border-color: rgba(139,92,246,.3); }
.node.data .node-ico { background: var(--teal-soft); border-color: rgba(45,212,191,.3); }
/* conector */
.connector {
  flex-shrink: 0;
  width: 38px;
  height: 2px;
  position: relative;
  background: var(--border-strong);
  align-self: center;
}
.connector::after {
  content: '';
  position: absolute;
  right: -1px; top: 50%;
  transform: translateY(-50%);
  border: 5px solid transparent;
  border-left-color: var(--coral);
}
.flow.vertical { flex-direction: column; align-items: flex-start; }
.flow.vertical .connector { width: 2px; height: 26px; margin-left: 56px; }
.flow.vertical .connector::after { right: auto; left: 50%; top: auto; bottom: -1px; transform: translateX(-50%); border: 5px solid transparent; border-top-color: var(--coral); }

/* ---------- Tabla comparativa ---------- */
.table-wrap { overflow-x: auto; margin: 22px 0; }
table.cmp {
  width: 100%;
  border-collapse: collapse;
  font-size: .9rem;
  min-width: 540px;
}
table.cmp th, table.cmp td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
table.cmp thead th {
  font-family: var(--font-display);
  color: var(--text);
  border-bottom: 1px solid var(--border-strong);
}
table.cmp tbody tr:hover { background: var(--surface); }
table.cmp td:first-child { color: var(--text); font-weight: 500; }
table.cmp .yes { color: var(--teal); }
table.cmp .no { color: var(--coral); }
table.cmp .hl { color: var(--coral-bright); font-weight: 600; }

/* ---------- Pasos numerados ---------- */
.steps { counter-reset: step; margin: 24px 0; }
.step {
  position: relative;
  padding: 0 0 24px 52px;
  border-left: 2px solid var(--border);
  margin-left: 16px;
}
.step:last-child { border-left-color: transparent; padding-bottom: 0; }
.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: -17px; top: -4px;
  width: 32px; height: 32px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: .85rem;
  color: #fff;
  background: linear-gradient(135deg, var(--coral), var(--coral-bright));
  box-shadow: 0 4px 12px -4px var(--coral);
}
.step h4 { font-family: var(--font-display); font-size: 1.08rem; margin-bottom: 4px; }
.step p { color: var(--text-secondary); margin: 4px 0; font-size: .95rem; }

/* ---------- Pills / chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.chip {
  font-family: var(--font-mono);
  font-size: .76rem;
  padding: 5px 11px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text-secondary);
}
.chip.coral { color: var(--coral-bright); border-color: var(--coral-line); background: var(--coral-soft); }
.chip.violet { color: var(--violet); border-color: rgba(139,92,246,.34); background: var(--violet-soft); }
.chip.teal { color: var(--teal); border-color: rgba(45,212,191,.34); background: var(--teal-soft); }

/* ---------- Stat / feature row ---------- */
.stats { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin: 28px 0; }
@media (max-width: 700px){ .stats { grid-template-columns: 1fr; } }
.stat {
  text-align: center;
  padding: 22px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}
.stat .big {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 700;
  background: linear-gradient(120deg, var(--coral), var(--coral-bright));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat .lbl { color: var(--text-muted); font-size: .85rem; margin-top: 4px; }

/* ---------- Navegación entre secciones ---------- */
.pager {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  margin: 56px 0 0;
  flex-wrap: wrap;
}
.pager a {
  flex: 1;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 16px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
  transition: border-color .2s, background .2s;
}
.pager a:hover { border-color: var(--coral-line); background: var(--surface-2); }
.pager a.next { text-align: right; align-items: flex-end; }
.pager .dir { font-family: var(--font-mono); font-size: .72rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; }
.pager .ttl { font-family: var(--font-display); font-weight: 600; }

/* ---------- Agenda / progreso ---------- */
.agenda-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
  margin-top: 26px;
  font-family: var(--font-mono);
  font-size: .82rem;
  color: var(--text-muted);
}
.agenda-bar strong { color: var(--coral-bright); }

/* ---------- Footer ---------- */
.footer {
  margin-top: 80px;
  border-top: 1px solid var(--border);
  padding: 40px clamp(16px,4vw,32px);
  text-align: center;
  color: var(--text-muted);
  font-size: .88rem;
}
.footer .author {
  display: inline-flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--text);
  margin-bottom: 14px;
}
.footer .author img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.footer .author b { display: block; font-size: .95rem; }
.footer .author small { color: var(--text-muted); font-size: .78rem; }

/* ---------- TOC lateral (en páginas de sección) ---------- */
.layout { display: grid; grid-template-columns: 1fr; gap: 0; }
.toc {
  position: sticky;
  top: 90px;
  align-self: start;
  font-size: .85rem;
  display: none;
}
.toc a { display: block; color: var(--text-muted); text-decoration: none; padding: 4px 0 4px 12px; border-left: 2px solid var(--border); transition: color .2s, border-color .2s; }
.toc a:hover, .toc a.active { color: var(--coral-bright); border-left-color: var(--coral); }
@media (min-width: 1180px) {
  .layout.with-toc { grid-template-columns: 1fr 220px; gap: 48px; max-width: 1180px; }
  .toc { display: block; }
}

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s, transform .6s; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}