/* ===== Tema base (tomado del panel de referencia del usuario) ===== */
:root {
  --background: 0 0% 100%;
  --foreground: 220 20% 5%;
  --card: 0 0% 100%;
  --card-foreground: 220 20% 5%;
  --primary: 48 96% 53%;
  --primary-foreground: 0 0% 0%;
  --secondary: 220 14% 90%;
  --secondary-foreground: 220 20% 10%;
  --muted: 220 14% 94%;
  --muted-foreground: 220 10% 40%;
  --accent: 48 96% 53%;
  --accent-foreground: 0 0% 0%;
  --border: 220 13% 85%;
  --radius: 0px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: 240 10% 4%;
    --foreground: 0 0% 100%;
    --card: 240 10% 6%;
    --card-foreground: 0 0% 100%;
    --primary: 48 96% 53%;
    --primary-foreground: 0 0% 0%;
    --secondary: 240 10% 10%;
    --secondary-foreground: 0 0% 100%;
    --muted: 240 10% 12%;
    --muted-foreground: 240 5% 65%;
    --accent: 48 96% 53%;
    --accent-foreground: 0 0% 0%;
    --border: 240 6% 20%;
  }
}

* {
  box-sizing: border-box;
}

html {
  scrollbar-width: thin;
  scrollbar-color: hsl(var(--primary) / .4) transparent;
}

body {
  margin: 0;
  background-color: hsl(var(--background));
  color: hsl(var(--foreground));
  font-family: "Inter", system-ui, sans-serif;
  line-height: 1.6;
}

a {
  color: hsl(var(--foreground));
  text-decoration-color: hsl(var(--primary));
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

a:hover {
  color: hsl(var(--accent-foreground));
  background: hsl(var(--accent));
}

/* ===== Barra superior fija con estado del documento ===== */
.doc-bar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.5rem;
  background: hsl(var(--background) / 0.9);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid hsl(var(--border));
}

.doc-bar .brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.doc-bar .brand .mark {
  width: 10px;
  height: 10px;
  background: hsl(var(--primary));
  transform: rotate(45deg);
  flex: none;
}

.doc-bar .meta {
  font-size: 0.8rem;
  color: hsl(var(--muted-foreground));
  text-align: right;
}

/* ===== Layout ===== */
.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.hero {
  padding: 3.5rem 0 2.5rem;
  border-bottom: 1px solid hsl(var(--border));
}

.hero .eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: hsl(var(--accent-foreground));
  background: hsl(var(--accent));
  padding: 0.25rem 0.6rem;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 0.75rem;
}

.hero p.lead {
  color: hsl(var(--muted-foreground));
  font-size: 1.05rem;
  max-width: 60ch;
  margin: 0;
}

.hero .facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-top: 1.75rem;
  font-size: 0.85rem;
}

.hero .facts div span {
  display: block;
  color: hsl(var(--muted-foreground));
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.15rem;
}

/* ===== Índice ===== */
.toc {
  margin: 2.5rem 0;
  padding: 1.25rem 1.5rem;
  border: 1px solid hsl(var(--border));
  background: hsl(var(--muted) / 0.5);
}

.toc h2 {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: hsl(var(--muted-foreground));
  margin: 0 0 0.85rem;
}

.toc ol {
  columns: 2;
  column-gap: 2rem;
  margin: 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
}

.toc li {
  break-inside: avoid;
  margin-bottom: 0.4rem;
}

.toc a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.toc a:hover {
  background: transparent;
  border-bottom-color: hsl(var(--primary));
}

/* ===== Secciones del documento ===== */
section.article {
  padding: 2.25rem 0;
  border-bottom: 1px solid hsl(var(--border));
  scroll-margin-top: 5rem;
}

section.article:last-of-type {
  border-bottom: none;
}

section.article h2 {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}

section.article h2 .num {
  color: hsl(var(--primary));
  font-variant-numeric: tabular-nums;
  font-size: 0.95rem;
}

section.article h3 {
  font-size: 1rem;
  margin: 1.5rem 0 0.6rem;
}

section.article p {
  margin: 0 0 0.9rem;
}

section.article ul,
section.article ol {
  padding-left: 1.3rem;
  margin: 0 0 0.9rem;
}

section.article li {
  margin-bottom: 0.45rem;
}

.quote-en {
  border-left: 3px solid hsl(var(--primary));
  padding: 0.9rem 1.1rem;
  margin: 1rem 0;
  font-style: italic;
  background: hsl(var(--muted) / 0.5);
}

/* ===== Tablas ===== */
.table-wrap {
  overflow-x: auto;
  margin: 1rem 0 1.25rem;
  border: 1px solid hsl(var(--border));
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

thead th {
  text-align: left;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: hsl(var(--muted-foreground));
  background: hsl(var(--muted));
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid hsl(var(--border));
}

tbody td {
  padding: 0.7rem 0.9rem;
  border-bottom: 1px solid hsl(var(--border));
  vertical-align: top;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: hsl(var(--muted) / 0.4);
}

/* ===== Aviso destacado (uso limitado) ===== */
.callout {
  border: 1px solid hsl(var(--primary));
  background: hsl(var(--primary) / 0.08);
  padding: 1.1rem 1.25rem;
  margin: 1rem 0 1.25rem;
}

.callout strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: hsl(var(--foreground));
}

/* ===== Contacto / pie ===== */
.contact-card {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1.25rem;
  padding: 1.5rem;
  border: 1px solid hsl(var(--border));
  background: hsl(var(--muted) / 0.4);
  margin-top: 1rem;
}

.contact-card div span {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: hsl(var(--muted-foreground));
  margin-bottom: 0.25rem;
}

footer {
  padding: 2.5rem 0 4rem;
  color: hsl(var(--muted-foreground));
  font-size: 0.82rem;
}

/* ===== Botón volver arriba ===== */
.top-link {
  display: inline-block;
  margin-top: 1rem;
  font-size: 0.8rem;
  color: hsl(var(--muted-foreground));
  text-decoration: none;
}

.top-link:hover {
  background: transparent;
  color: hsl(var(--foreground));
}

@media (max-width: 640px) {
  .toc ol {
    columns: 1;
  }
  .doc-bar .meta {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
  }
}