/* =========================================================
   Neuroexposición — neuroexposicion.cl
   Sistema de diseño v4 · BW — consola oscura por defecto
   ========================================================= */

:root {
  --paper:        #f4f4f4;
  --paper-strong: #ffffff;
  --paper-deep:   #e9e9e9;
  --paper-edge:   #d4d4d4;
  --console:      #0a0a0a;
  --console-deep: #000000;
  --console-rule: #262626;
  --console-soft: #161616;
  --ink:          #000000;
  --ink-soft:     #2a2a2a;
  --ink-mute:     #6e6e6e;
  --c-text:       #f0f0f0;
  --c-soft:       #c0c0c0;
  --c-mute:       #7a7a7a;
  --c-dim:        #3a3a3a;
  --signal:       #ffffff;
  --rule:         #cfcfcf;
  --danger:       #b91c1c;

  --font-display: "Source Serif 4", "Source Serif Pro", Georgia, serif;
  --font-sans:    "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Helvetica Neue", sans-serif;
  --font-mono:    "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;

  --fs-monumental: clamp(3rem, 8vw + 1rem, 6.5rem);
  --fs-h1:         clamp(2.5rem, 5vw + 1rem, 4.5rem);
  --fs-h2:         clamp(1.75rem, 2.5vw + 0.5rem, 3rem);
  --fs-h3:         1.25rem;
  --fs-lead:       clamp(1.05rem, 1.5vw, 1.25rem);
  --fs-body:       1rem;
  --fs-small:      0.875rem;
  --fs-label:      0.75rem;
  --lh-tight: 1.05;
  --lh-snug:  1.25;
  --lh-body:  1.65;
  --tr-tight: -0.022em;
  --tr-label: 0.09em;
}

html { color-scheme: dark; background: var(--console); scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--c-text);
  background-image: linear-gradient(var(--console), var(--console));
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-width: 320px;
}

*, *::before, *::after { box-sizing: border-box; }

button, input, select, textarea { font: inherit; }
button, a, input, select, textarea { outline: none; }

a { color: var(--signal); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--c-text); text-decoration: none; background: none; }

button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  line-height: var(--lh-tight);
  letter-spacing: var(--tr-tight);
  color: var(--signal);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-family: var(--font-sans); font-weight: 600; font-size: var(--fs-h3); color: var(--c-text); }

p { margin: 0 0 1rem; max-width: 66ch; color: var(--c-soft); line-height: var(--lh-body); }

.eyebrow, .kicker, .section-label, .record-tag, time {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: var(--tr-label);
  text-transform: uppercase;
  color: var(--c-mute);
}

/* ─ skip link ─ */
.skip-link {
  position: absolute;
  top: -80px;
  left: 16px;
  z-index: 20;
  padding: 10px 16px;
  background: var(--signal);
  color: var(--console);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { top: 16px; }

/* ─ header ─ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  min-height: 60px;
  border-bottom: 1px solid var(--console-rule);
  background-image: linear-gradient(rgba(10,10,10,0.96), rgba(10,10,10,0.96));
  backdrop-filter: blur(8px);
}

.brand, .site-nav a {
  display: inline-flex;
  align-items: center;
  padding: 0 20px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--tr-label);
  text-decoration: none;
  text-transform: uppercase;
  color: var(--c-soft);
  transition: color 120ms ease;
}

.brand { gap: 10px; border-right: 1px solid var(--console-rule); }
.brand:hover { color: var(--signal); background: none; }
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 30px;
  border: 1px solid var(--c-dim);
  color: var(--c-soft);
  font-size: 0.7rem;
}

.site-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; }
.site-nav a { border-left: 1px solid var(--console-rule); font-size: 0.7rem; }
.site-nav a:hover { color: var(--signal); background: none; }

/* ─ hero ─ */
.hero {
  padding: clamp(56px, 8vw, 100px) clamp(20px, 5vw, 64px) 0;
  border-bottom: 1px solid var(--console-rule);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.7fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
  max-width: 1240px;
  margin: 0 auto;
}

.hero h1 {
  font-size: var(--fs-monumental);
  max-width: 14ch;
  margin-bottom: 0.5rem;
}

.lead {
  max-width: 60ch;
  margin: 20px 0 32px;
  font-size: var(--fs-lead);
  line-height: 1.6;
  color: var(--c-soft);
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* ─ buttons ─ */
.btn, .button, .plain-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid var(--console-rule);
  border-radius: 3px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease, border-color 140ms ease;
}

.btn-primary, .button.primary {
  background: var(--signal);
  color: var(--console);
  border-color: var(--signal);
}
.btn-primary:hover, .button.primary:hover { background: var(--c-text); color: var(--console); }

.btn-secondary, .button.secondary, .plain-link {
  background: transparent;
  color: var(--c-text);
  border-color: var(--console-rule);
}
.btn-secondary:hover, .button.secondary:hover, .plain-link:hover {
  background: var(--console-soft);
  color: var(--signal);
}

.faux-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 0;
  color: var(--c-mute);
  font-size: 0.875rem;
  text-decoration: none;
  cursor: default;
}

/* ─ signal board ─ */
.signal-board {
  margin: 0;
  border: 1px solid var(--console-rule);
  background-image: linear-gradient(var(--console-soft), var(--console-soft));
  color: var(--c-soft);
}

.signal-board figcaption {
  padding: 8px 14px;
  border-bottom: 1px solid var(--console-rule);
  color: var(--c-mute);
}

.signal-board pre {
  min-height: 300px;
  margin: 0;
  padding: 20px;
  overflow: auto;
  font-family: var(--font-mono);
  font-size: clamp(0.78rem, 1.3vw, 0.9rem);
  line-height: 1.55;
  color: var(--c-soft);
  white-space: pre;
}

/* ─ status strip ─ */
.status-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 1240px;
  margin: clamp(32px, 4vw, 48px) auto 0;
  border: 1px solid var(--console-rule);
  border-bottom: 0;
}

.status-strip a {
  display: grid;
  gap: 4px;
  min-height: 72px;
  padding: 14px 18px;
  border-right: 1px solid var(--console-rule);
  text-decoration: none;
  transition: background 120ms ease;
}
.status-strip a:last-child { border-right: 0; }
.status-strip a:hover { background: var(--console-soft); }

.status-strip strong {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--c-text);
  text-transform: none;
}
.status-strip span { font-size: var(--fs-small); color: var(--c-mute); }

/* ─ sections ─ */
.section {
  display: grid;
  grid-template-columns: minmax(140px, 0.24fr) minmax(0, 1fr);
  gap: clamp(20px, 4vw, 56px);
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(56px, 8vw, 100px) clamp(20px, 5vw, 64px);
  border-bottom: 1px solid var(--console-rule);
}

.section-label {
  position: sticky;
  top: 80px;
  align-self: start;
  color: var(--c-dim);
}

.section-body > p {
  max-width: 72ch;
  margin: 20px 0 0;
  font-size: var(--fs-lead);
  color: var(--c-soft);
}

/* ─ record cards ─ */
.record-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.record {
  display: flex;
  flex-direction: column;
  min-height: 300px;
  padding: 20px;
  border: 1px solid var(--console-rule);
  background-image: linear-gradient(var(--console-soft), var(--console-soft));
  transition: border-color 140ms ease;
}
.record:hover { border-color: var(--c-dim); }

.record-tag { margin: 0 0 16px; }
.record h3 { font-size: 1.1rem; color: var(--c-text); margin-bottom: 10px; }
.record p:not(.record-tag) { margin: 0 0 20px; font-size: var(--fs-small); color: var(--c-soft); }
.record a { margin-top: auto; color: var(--signal); font-size: var(--fs-small); }
.record a:hover { color: var(--c-text); }

/* ─ numbered list ─ */
.numbered-list {
  display: grid;
  gap: 12px;
  max-width: 800px;
  margin: 28px 0 0;
  padding: 0;
  counter-reset: method;
  list-style: none;
}

.numbered-list li {
  position: relative;
  padding: 16px 20px 16px 72px;
  border: 1px solid var(--console-rule);
  font-size: var(--fs-lead);
  color: var(--c-soft);
  line-height: 1.6;
}

.numbered-list li::before {
  counter-increment: method;
  content: "0" counter(method);
  position: absolute;
  top: 16px;
  left: 20px;
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 600;
  letter-spacing: var(--tr-label);
  color: var(--c-mute);
}

/* ─ resource table ─ */
.resource-table {
  display: grid;
  margin-top: 28px;
  border: 1px solid var(--console-rule);
}

.table-row {
  display: grid;
  grid-template-columns: 0.65fr 2fr 0.65fr;
  border-bottom: 1px solid var(--console-rule);
}
.table-row:last-child { border-bottom: 0; }

.table-row span {
  padding: 12px 16px;
  border-right: 1px solid var(--console-rule);
  font-size: var(--fs-small);
  color: var(--c-soft);
}
.table-row span:last-child { border-right: 0; }

.table-head { background-image: linear-gradient(var(--console-deep), var(--console-deep)); }
.table-head span {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: var(--tr-label);
  text-transform: uppercase;
  color: var(--c-mute);
}

/* ─ bibliography ─ */
.bibliography {
  margin-top: 24px;
  padding: 20px 24px;
  border: 1px solid var(--console-rule);
  background-image: linear-gradient(var(--console-soft), var(--console-soft));
}

.bibliography h3 { color: var(--c-soft); margin-bottom: 12px; }
.bibliography ul { margin: 0; padding-left: 20px; }
.bibliography li { color: var(--c-soft); font-size: var(--fs-small); line-height: 1.6; }
.bibliography li + li { margin-top: 6px; }

/* ─ bitácora ─ */
.log-list { display: grid; gap: 12px; margin-top: 28px; }

.log-list article {
  display: grid;
  grid-template-columns: 160px minmax(0, 0.9fr) minmax(0, 1.3fr);
  gap: 20px;
  align-items: start;
  padding: 16px 20px;
  border: 1px solid var(--console-rule);
}

.log-list time { display: block; padding-top: 2px; }
.log-list h3 { font-size: 1rem; color: var(--c-text); font-weight: 500; }
.log-list p { margin: 4px 0 0; font-size: var(--fs-small); color: var(--c-mute); }

/* ─ inspect ─ */
.inspect-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.65fr);
  gap: 16px;
  margin-top: 28px;
}

.inspect-grid dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border: 1px solid var(--console-rule);
}

.inspect-grid dl div {
  padding: 16px 20px;
  border-right: 1px solid var(--console-rule);
  border-bottom: 1px solid var(--console-rule);
}
.inspect-grid dl div:nth-child(2n) { border-right: 0; }
.inspect-grid dl div:nth-last-child(-n + 2) { border-bottom: 0; }

.inspect-grid dt {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  font-weight: 500;
  letter-spacing: var(--tr-label);
  text-transform: uppercase;
  color: var(--c-mute);
}

.inspect-grid dd {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 400;
  color: var(--signal);
  letter-spacing: var(--tr-tight);
}

.inspect-copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--console-rule);
  background-image: linear-gradient(var(--console-soft), var(--console-soft));
}
.inspect-copy p { margin: 0; font-size: var(--fs-small); color: var(--c-soft); max-width: none; }

/* ─ footer ─ */
.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  padding: 28px clamp(20px, 5vw, 64px);
  border-top: 1px solid var(--console-rule);
  color: var(--c-mute);
}

.site-footer div { display: grid; gap: 4px; }
.site-footer strong { color: var(--c-soft); font-weight: 500; }
.site-footer span { font-size: var(--fs-small); }
.site-footer a { color: var(--c-mute); text-decoration: none; font-size: var(--fs-small); }
.site-footer a:hover { color: var(--signal); }

/* ─ responsivo ─ */
@media (max-width: 980px) {
  .site-header { position: static; display: grid; }
  .brand { border-right: 0; border-bottom: 1px solid var(--console-rule); }
  .site-nav { justify-content: stretch; }
  .site-nav a { flex: 1 1 33.333%; justify-content: center; min-height: 44px; padding: 0 8px; border-top: 0; }

  .hero-grid,
  .section,
  .inspect-grid,
  .site-footer { grid-template-columns: 1fr; }

  .section-label { position: static; }
  .record-grid { grid-template-columns: 1fr; }
  .status-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .status-strip a:nth-child(2n) { border-right: 0; }
  .status-strip a:nth-child(-n + 2) { border-bottom: 1px solid var(--console-rule); }
  .log-list article { grid-template-columns: 1fr; gap: 8px; }
}

@media (max-width: 680px) {
  .site-nav a { flex-basis: 50%; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn, .button, .plain-link { width: 100%; justify-content: center; }
  .status-strip, .inspect-grid dl, .table-row { grid-template-columns: 1fr; }
  .status-strip a, .table-row span, .inspect-grid dl div {
    border-right: 0;
    border-bottom: 1px solid var(--console-rule);
  }
  .status-strip a:last-child, .table-row span:last-child, .inspect-grid dl div:last-child { border-bottom: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}