/* =============================================================
   VERA STRATA · Página web
   ============================================================= */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--vs-abismo);
  color: var(--fg-on-dark);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { background: none; border: 0; cursor: pointer; color: inherit; font: inherit; padding: 0; }

/* ---- container ---- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 48px;
}
@media (max-width: 720px) {
  .container { padding: 0 24px; }
}

/* =============================================================
   NAV
   ============================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(26, 27, 31, 0.72);
  backdrop-filter: blur(14px) saturate(120%);
  -webkit-backdrop-filter: blur(14px) saturate(120%);
  border-bottom: 1px solid var(--vs-papel-08);
  transition: border-color 320ms var(--ease-vs), background 320ms var(--ease-vs);
}
.nav.scrolled {
  background: rgba(26, 27, 31, 0.92);
  border-bottom-color: var(--vs-papel-16);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 14px;
  letter-spacing: 0.18em;
}
.brand-mark {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--fg-on-dark);
}
.brand-mark .dot { color: var(--vs-terra); margin-left: 2px; }
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--vs-papel-60);
  transition: color 220ms var(--ease-vs);
  position: relative;
  padding: 8px 0;
}
.nav-links a:hover { color: var(--fg-on-dark); }
.nav-coord {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--vs-papel-40);
  font-variant-numeric: tabular-nums;
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-coord { display: none; }
}

/* =============================================================
   HERO · Claridad operativa
   ============================================================= */
.hero {
  position: relative;
  padding: 120px 0 160px;
  overflow: hidden;
}
.hero::before {
  /* radial accent glow — replaces topographic stripes */
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 78% 35%, rgba(184, 113, 86, 0.06) 0, transparent 55%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
  gap: 64px;
  align-items: center;
}
.hero-copy {
  min-width: 0;
  position: relative;
  z-index: 2;
}
.hero-art {
  position: relative;
  align-self: stretch;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--vs-papel);
  min-height: 520px;
  max-height: 620px;
  z-index: 1;
}
.hero-art .mtn-img {
  /* Wide — keeps the image as background, but less aggressive stretch so it stays crisp */
  width: 200%;
  max-width: none;
  height: 100%;
  max-height: 620px;
  margin-left: -85%;
  margin-right: -25%;
  object-fit: fill;
  filter: drop-shadow(0 30px 60px rgba(0,0,0,0.45));
  animation:
    hero-art-in 1400ms var(--ease-vs) both,
    mtn-drift 32s var(--ease-vs) 1400ms infinite alternate,
    mtn-breathe 14s ease-in-out 1400ms infinite alternate;
  transform-origin: 60% 50%;
  mix-blend-mode: screen;
  opacity: 0.7;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: high-quality;
  -webkit-mask-image:
    linear-gradient(to right, transparent 0%, rgba(0,0,0,0.2) 18%, rgba(0,0,0,0.55) 38%, #000 62%, #000 80%, transparent 100%),
    linear-gradient(to bottom, transparent 0%, #000 10%, #000 90%, transparent 100%);
  -webkit-mask-composite: source-in;
          mask-image:
    linear-gradient(to right, transparent 0%, rgba(0,0,0,0.2) 18%, rgba(0,0,0,0.55) 38%, #000 62%, #000 80%, transparent 100%),
    linear-gradient(to bottom, transparent 0%, #000 10%, #000 90%, transparent 100%);
  mask-composite: intersect;
}
@keyframes mtn-drift {
  0%   { transform: translateX(0)     scale(1); }
  100% { transform: translateX(-1.6%) scale(1.015); }
}
@keyframes mtn-breathe {
  0%   { filter: drop-shadow(0 30px 60px rgba(0,0,0,0.45)) brightness(1); }
  100% { filter: drop-shadow(0 36px 70px rgba(0,0,0,0.50)) brightness(1.06); }
}
.hero-art::before {
  /* radial accent glow behind summit */
  content: "";
  position: absolute;
  top: 6%;
  left: 35%;
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, rgba(184, 113, 86, 0.16) 0, transparent 60%);
  filter: blur(12px);
  pointer-events: none;
  z-index: 0;
}
@keyframes hero-art-in {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}
.hero-art .mtn-ridge {
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
  animation: ridge-draw 2200ms var(--ease-vs) forwards;
}
.hero-art .mtn-ridge:nth-child(1) { animation-delay: 300ms; }
.hero-art .mtn-ridge:nth-child(2) { animation-delay: 360ms; }
.hero-art .mtn-ridge:nth-child(3) { animation-delay: 420ms; }
.hero-art .mtn-ridge:nth-child(4) { animation-delay: 480ms; }
.hero-art .mtn-ridge:nth-child(5) { animation-delay: 540ms; }
.hero-art .mtn-ridge:nth-child(6) { animation-delay: 600ms; }
.hero-art .mtn-ridge:nth-child(7) { animation-delay: 660ms; }
.hero-art .mtn-ridge:nth-child(8) { animation-delay: 720ms; }
.hero-art .mtn-ridge:nth-child(9) { animation-delay: 780ms; }
@keyframes ridge-draw {
  to { stroke-dashoffset: 0; }
}
.hero-art .mtn-summit {
  opacity: 0;
}
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 24px; }
  .hero-art { min-height: 320px; max-height: 420px; order: 2; }
  .hero-art .mtn-img {
    max-height: 420px;
    width: 140%;
    margin-left: -20%;
    margin-right: -20%;
    opacity: 0.85;
  }
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  color: var(--vs-papel-60);
  margin-bottom: 56px;
}
.section-label::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--vs-terra);
}

.hero-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(56px, 8.5vw, 132px);
  line-height: 0.94;
  letter-spacing: -0.025em;
  color: var(--fg-on-dark);
  margin: 0;
  text-wrap: balance;
}
.hero-title .period { color: var(--vs-terra); }
.hero-sub {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.4;
  color: var(--vs-papel-60);
  max-width: 640px;
  margin: 48px 0 0;
  text-wrap: balance;
}
.hero-cta-row {
  margin-top: 56px;
  display: flex;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

/* CTA */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  padding: 18px 28px;
  border: 1px solid var(--vs-papel-16);
  background: transparent;
  color: var(--fg-on-dark);
  transition: all 320ms var(--ease-vs);
}
.btn:hover {
  background: var(--vs-papel);
  color: var(--vs-abismo);
  border-color: var(--vs-papel);
}
.btn .arrow {
  width: 18px; height: 1px; background: currentColor; position: relative; transition: width 320ms var(--ease-vs);
}
.btn .arrow::after {
  content: ""; position: absolute; right: 0; top: -3px;
  width: 7px; height: 7px; border-top: 1px solid currentColor; border-right: 1px solid currentColor; transform: rotate(45deg);
}
.btn:hover .arrow { width: 28px; }

.btn-ghost {
  border: 0;
  padding: 18px 0;
}
.btn-ghost:hover { background: transparent; color: var(--vs-terra); border-color: transparent; }

/* =============================================================
   METRICS · numbers strip
   ============================================================= */
.metrics {
  border-top: 1px solid var(--vs-papel-16);
  border-bottom: 1px solid var(--vs-papel-16);
  padding: 56px 0;
  background: rgba(242, 240, 235, 0.02);
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 720px) {
  .metrics-grid { grid-template-columns: 1fr; gap: 32px; }
}
.metric {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 0 32px;
  border-left: 1px solid var(--vs-papel-08);
}
.metric:first-child { border-left: 0; padding-left: 0; }
.metric-label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.26em;
  color: var(--vs-papel-40);
}
.metric-value {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: clamp(48px, 5.5vw, 72px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--fg-on-dark);
  font-variant-numeric: tabular-nums;
}
.metric-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--vs-papel-40);
}

/* =============================================================
   CAPA POR CAPA · methodology
   ============================================================= */
.capa {
  padding: 160px 0 80px;
  position: relative;
}
.capa-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  align-items: start;
}
@media (max-width: 960px) {
  .capa-grid { grid-template-columns: 1fr; gap: 56px; }
}
.capa-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(48px, 6vw, 88px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  margin: 0 0 32px;
  text-wrap: balance;
}
.capa-title .period { color: var(--vs-burdeos); }
.capa-lede {
  font-family: var(--font-long);
  font-size: 17px;
  line-height: 1.6;
  color: var(--vs-papel-60);
  max-width: 52ch;
  margin: 0 0 48px;
}

.capa-stages {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.stage-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  padding: 24px 0;
  border-top: 1px solid var(--vs-papel-08);
  align-items: baseline;
}
.stage-row:last-child { border-bottom: 1px solid var(--vs-papel-08); }
.stage-name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--vs-arena);
  min-width: 160px;
}
.stage-copy {
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--vs-papel-60);
  margin: 0;
}

/* Right column: rombo + quote */
.capa-aside {
  position: sticky;
  top: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 48px;
}
@media (max-width: 960px) {
  .capa-aside { position: static; }
}
.rombo-frame {
  position: relative;
  width: 100%;
  max-width: 360px;
  aspect-ratio: 1 / 0.92;
  display: grid;
  place-items: center;
}
.rombo-frame img {
  width: 76%;
  filter: drop-shadow(0 24px 60px rgba(0,0,0,0.45));
  animation: rombo-float 12s ease-in-out infinite;
}
@keyframes rombo-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}
.rombo-label {
  font-family: var(--font-display);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  color: var(--vs-papel-40);
  margin-top: 12px;
}

.aside-quote {
  border-top: 1px solid var(--vs-papel-16);
  padding-top: 32px;
  max-width: 320px;
  font-family: var(--font-long);
  font-style: italic;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--vs-papel-60);
  text-align: left;
}
.aside-quote::before {
  content: "—";
  display: inline-block;
  margin-right: 6px;
  color: var(--vs-terra);
}

/* =============================================================
   RESULTADOS · chart section
   ============================================================= */
.resultados {
  padding: 140px 0 160px;
  position: relative;
  border-top: 1px solid var(--vs-papel-08);
}
.resultados-head {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: end;
  margin-bottom: 72px;
}
@media (max-width: 900px) {
  .resultados-head { grid-template-columns: 1fr; gap: 32px; }
}
.resultados-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(44px, 5.4vw, 80px);
  line-height: 1;
  letter-spacing: -0.025em;
  margin: 0;
  text-wrap: balance;
}
.resultados-title .pop { color: var(--vs-terra); }
.resultados-kpis {
  display: flex;
  gap: 48px;
}
.kpi {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.kpi-value {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: 40px;
  line-height: 1;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.kpi-value.up   { color: var(--vs-terra); }
.kpi-value.down { color: var(--vs-arena); }
.kpi-value .glyph { font-size: 18px; opacity: 0.8; }
.kpi-label {
  font-family: var(--font-display);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--vs-papel-60);
  max-width: 200px;
  line-height: 1.4;
}

.chart-wrap {
  border-top: 1px solid var(--vs-papel-16);
  padding-top: 40px;
}
.chart-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--vs-papel-40);
  letter-spacing: 0.06em;
}
.chart-legend {
  display: flex;
  gap: 28px;
}
.legend-item { display: inline-flex; align-items: center; gap: 8px; }
.legend-swatch {
  width: 18px; height: 1.5px;
  background: var(--vs-terra);
}
.legend-swatch.b { background: var(--vs-papel-40); }

.chart {
  width: 100%;
  aspect-ratio: 16 / 6;
  position: relative;
}
.chart svg { width: 100%; height: 100%; }

.chart-foot {
  margin-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.chart-cta {
  font-family: var(--font-display);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--vs-terra);
  border-bottom: 1px solid var(--vs-terra-60);
  padding-bottom: 6px;
  transition: all 320ms var(--ease-vs);
}
.chart-cta:hover { color: var(--vs-papel); border-color: var(--vs-papel); }

/* =============================================================
   GRIETA · 4 process cards
   ============================================================= */
.grieta {
  padding: 140px 0 160px;
  background: #131418;
  border-top: 1px solid var(--vs-papel-08);
}
.grieta-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  margin-bottom: 80px;
  gap: 32px;
  flex-wrap: wrap;
}
.grieta-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1;
  letter-spacing: -0.025em;
  margin: 0;
  max-width: 14ch;
  text-wrap: balance;
}
.grieta-title .pop { color: var(--vs-arena); }
.grieta-sub {
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.55;
  color: var(--vs-papel-60);
  max-width: 38ch;
  margin: 0;
}

.grieta-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--vs-papel-16);
}
@media (max-width: 960px) { .grieta-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .grieta-grid { grid-template-columns: 1fr; } }

.step {
  padding: 40px 32px 48px;
  border-right: 1px solid var(--vs-papel-08);
  display: flex;
  flex-direction: column;
  gap: 22px;
  transition: background 320ms var(--ease-vs);
  position: relative;
}
.step:hover { background: rgba(184, 113, 86, 0.04); }
.step:last-child { border-right: 0; }
@media (max-width: 960px) {
  .step:nth-child(2n) { border-right: 0; }
  .step:nth-child(-n+2) { border-bottom: 1px solid var(--vs-papel-08); }
}
@media (max-width: 560px) {
  .step { border-right: 0; border-bottom: 1px solid var(--vs-papel-08); }
  .step:last-child { border-bottom: 0; }
}

.step-num {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--vs-terra);
  font-variant-numeric: tabular-nums;
}
.step-name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--fg-on-dark);
}
.step-copy {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.55;
  color: var(--vs-papel-60);
  margin: 0;
}

/* =============================================================
   PUNTO DE EBULLICIÓN · closer
   ============================================================= */
.ebullicion {
  padding: 180px 0 160px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.ebullicion::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 40%, rgba(184, 113, 86, 0.1) 0, transparent 50%);
  pointer-events: none;
}
.ebullicion-inner { position: relative; z-index: 1; }
.ebullicion-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--vs-papel-40);
  margin-bottom: 48px;
}
.ebullicion-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(48px, 7.5vw, 120px);
  line-height: 0.96;
  letter-spacing: -0.025em;
  margin: 0 auto;
  max-width: 16ch;
  text-wrap: balance;
}
.ebullicion-title .pop { color: var(--vs-burdeos); }
.ebullicion-sub {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: clamp(16px, 1.4vw, 19px);
  color: var(--vs-papel-60);
  margin: 48px auto 0;
  max-width: 52ch;
  line-height: 1.55;
  text-wrap: balance;
}
.ebullicion-cta {
  margin-top: 64px;
  display: inline-flex;
}

/* =============================================================
   FOOTER
   ============================================================= */
.footer {
  border-top: 1px solid var(--vs-papel-16);
  padding: 96px 0 56px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 96px;
}
@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 56px 32px; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand .brand-mark { font-size: 14px; }
.footer-brand p {
  margin-top: 24px;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--vs-papel-40);
  max-width: 30ch;
}
.footer-col h4 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  color: var(--vs-papel-60);
  margin: 0 0 28px;
}
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.footer-col a {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--vs-papel-60);
  transition: color 220ms var(--ease-vs);
}
.footer-col a:hover { color: var(--vs-terra); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--vs-papel-08);
  padding-top: 32px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--vs-papel-40);
  letter-spacing: 0.04em;
  font-variant-numeric: tabular-nums;
  gap: 16px;
  flex-wrap: wrap;
}

/* =============================================================
   SCROLL FADE-IN
   ============================================================= */
.fade-up {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 800ms var(--ease-vs), transform 800ms var(--ease-vs);
}
.fade-up.in {
  opacity: 1;
  transform: translateY(0);
}
.fade-up.d1 { transition-delay: 80ms; }
.fade-up.d2 { transition-delay: 160ms; }
.fade-up.d3 { transition-delay: 240ms; }
.fade-up.d4 { transition-delay: 320ms; }

/* =============================================================
   INNER PAGES · sub-hero, breadcrumb
   ============================================================= */
.page-hero {
  padding: 132px 0 88px;
  position: relative;
  border-bottom: 1px solid var(--vs-papel-08);
}
.page-hero-inner { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--vs-papel-40);
  text-transform: uppercase;
  margin-bottom: 40px;
}
.breadcrumb a {
  color: var(--vs-papel-40);
  transition: color 220ms var(--ease-vs);
}
.breadcrumb a:hover { color: var(--fg-on-dark); }
.breadcrumb-sep { opacity: 0.5; }
.page-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(48px, 6vw, 88px);
  line-height: 1;
  letter-spacing: -0.025em;
  margin: 0;
  max-width: 18ch;
  text-wrap: balance;
}
.page-title .period { color: var(--vs-terra); }
.page-lede {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: clamp(17px, 1.5vw, 21px);
  line-height: 1.55;
  color: var(--vs-papel-60);
  max-width: 64ch;
  margin: 40px 0 0;
}

/* =============================================================
   ARTICLES INDEX
   ============================================================= */
.articles-section { padding: 100px 0 160px; }
.article-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--vs-papel-16);
}
.article-card {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 48px;
  padding: 44px 0;
  border-bottom: 1px solid var(--vs-papel-08);
  align-items: start;
  transition: background 320ms var(--ease-vs);
}
.article-card:hover { background: rgba(184, 113, 86, 0.025); }
.article-card:hover .article-card-arrow { transform: translateX(6px); color: var(--vs-terra); }
.article-num {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: 32px;
  letter-spacing: -0.02em;
  color: var(--vs-terra);
  font-variant-numeric: tabular-nums;
}
.article-meta-row {
  display: flex;
  gap: 24px;
  margin-bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--vs-papel-40);
  text-transform: uppercase;
}
.article-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(22px, 2.3vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0;
  text-wrap: balance;
  color: var(--fg-on-dark);
}
.article-authors {
  margin-top: 14px;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--vs-papel-60);
}
.article-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.article-tag {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  padding: 5px 10px;
  border: 1px solid var(--vs-papel-16);
  color: var(--vs-papel-60);
}
.article-card-arrow {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--vs-papel-40);
  transition: transform 320ms var(--ease-vs), color 320ms var(--ease-vs);
  align-self: center;
}
@media (max-width: 720px) {
  .article-card { grid-template-columns: 1fr; gap: 16px; padding: 36px 0; }
  .article-num { font-size: 20px; }
  .article-card-arrow { display: none; }
}

/* =============================================================
   ARTICLE BODY · scientific paper rendering
   ============================================================= */
.article-body {
  padding: 80px 0 140px;
}
.article-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 80px;
  align-items: start;
}
@media (max-width: 900px) {
  .article-layout { grid-template-columns: 1fr; gap: 32px; }
  .article-toc { position: static; }
}
.article-toc {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.article-toc h4 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.28em;
  color: var(--vs-papel-40);
  margin: 0 0 8px;
}
.article-toc a {
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--vs-papel-60);
  line-height: 1.4;
  padding: 6px 0;
  border-left: 1px solid var(--vs-papel-08);
  padding-left: 14px;
  transition: all 220ms var(--ease-vs);
}
.article-toc a:hover { color: var(--fg-on-dark); border-left-color: var(--vs-terra); }

.article-content { max-width: 720px; }
.article-content h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 28px;
  letter-spacing: -0.015em;
  line-height: 1.2;
  margin: 64px 0 24px;
  color: var(--fg-on-dark);
}
.article-content h2:first-child { margin-top: 0; }
.article-content h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: 0;
  margin: 40px 0 16px;
  color: var(--fg-on-dark);
}
.article-content h2 .num,
.article-content h3 .num {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: 0.7em;
  color: var(--vs-terra);
  margin-right: 14px;
  letter-spacing: 0.04em;
}
.article-content p {
  font-family: var(--font-long);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  color: var(--vs-papel-60);
  margin: 0 0 20px;
  text-wrap: pretty;
}
.article-content p strong { color: var(--fg-on-dark); font-weight: 500; }
.article-content ul, .article-content ol {
  font-family: var(--font-long);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--vs-papel-60);
  padding-left: 24px;
  margin: 0 0 24px;
}
.article-content ul li, .article-content ol li {
  margin-bottom: 8px;
}
.article-content ul li::marker {
  color: var(--vs-terra);
}
.article-content code, .article-content .mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--vs-arena);
  background: rgba(242, 240, 235, 0.04);
  padding: 1px 6px;
  border-radius: 2px;
}
.article-content a:not(.btn) {
  color: var(--vs-terra);
  border-bottom: 1px solid var(--vs-terra-60);
  padding-bottom: 1px;
}

/* Equations */
.eq {
  margin: 28px 0;
  padding: 24px 28px;
  background: rgba(242, 240, 235, 0.025);
  border-left: 2px solid var(--vs-terra);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  color: var(--vs-papel);
  position: relative;
  overflow-x: auto;
}
.eq .eq-num {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--vs-papel-40);
  font-size: 12px;
}
.eq-inline {
  font-family: var(--font-mono);
  color: var(--vs-arena);
  font-size: 0.95em;
}

/* Article hero meta panel */
.article-hero-meta {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--vs-papel-16);
  border-bottom: 1px solid var(--vs-papel-16);
  padding: 28px 0;
}
@media (max-width: 720px) {
  .article-hero-meta { grid-template-columns: 1fr 1fr; gap: 24px 0; }
}
.article-hero-meta dt {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.26em;
  color: var(--vs-papel-40);
  margin-bottom: 8px;
}
.article-hero-meta dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--fg-on-dark);
}
.article-hero-meta dd .mono {
  font-family: var(--font-mono);
  font-weight: 300;
  background: transparent;
  color: var(--vs-arena);
  padding: 0;
}

/* Abstract block */
.abstract {
  margin: 0 0 64px;
  padding: 32px 36px;
  background: rgba(242, 240, 235, 0.03);
  border: 1px solid var(--vs-papel-08);
}
.abstract-label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  color: var(--vs-terra);
  margin-bottom: 16px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.abstract-label::before { content: ""; width: 24px; height: 1px; background: var(--vs-terra); }
.abstract p {
  font-family: var(--font-long);
  font-size: 15px;
  line-height: 1.7;
  color: var(--vs-papel);
  margin: 0;
}
.abstract .keywords {
  margin-top: 16px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--vs-papel-60);
}
.abstract .keywords strong { color: var(--vs-papel); font-weight: 500; }

/* Figures */
.figure {
  margin: 40px 0;
  border: 1px solid var(--vs-papel-08);
  background: #FFFFFF;
}
.figure img {
  width: 100%;
  display: block;
}
.figure figcaption {
  padding: 14px 20px;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.5;
  color: var(--vs-papel-60);
  background: rgba(242, 240, 235, 0.025);
  border-top: 1px solid var(--vs-papel-08);
}
.figure figcaption b {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--vs-terra);
  margin-right: 8px;
}

/* =============================================================
   CASOS (case studies) index
   ============================================================= */
.casos-section { padding: 100px 0 140px; }
.casos-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 1px solid var(--vs-papel-16);
  border-left: 1px solid var(--vs-papel-16);
}
@media (max-width: 760px) { .casos-grid { grid-template-columns: 1fr; } }
.caso {
  padding: 48px 40px 56px;
  border-right: 1px solid var(--vs-papel-16);
  border-bottom: 1px solid var(--vs-papel-16);
  display: flex;
  flex-direction: column;
  gap: 24px;
  transition: background 320ms var(--ease-vs);
  position: relative;
}
.caso:hover { background: rgba(184, 113, 86, 0.03); }
.caso-meta {
  display: flex;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--vs-papel-40);
  text-transform: uppercase;
}
.caso-meta .sep { opacity: 0.5; }
.caso-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 26px;
  line-height: 1.18;
  letter-spacing: -0.015em;
  color: var(--fg-on-dark);
  margin: 0;
  text-wrap: balance;
}
.caso-desc {
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--vs-papel-60);
  margin: 0;
}
.caso-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-left: 16px;
  border-left: 1px solid var(--vs-papel-08);
}
.caso-block-label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.26em;
  color: var(--vs-terra);
}
.caso-metrics {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--vs-papel-08);
}
.caso-metric { display: flex; flex-direction: column; gap: 4px; }
.caso-metric-val {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: 26px;
  letter-spacing: -0.02em;
  color: var(--vs-terra);
  font-variant-numeric: tabular-nums;
}
.caso-metric-lbl {
  font-family: var(--font-display);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--vs-papel-40);
}
.caso-status {
  position: absolute;
  top: 28px;
  right: 32px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--vs-arena);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.caso-status::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--vs-arena);
  border-radius: 50%;
}

/* =============================================================
   CONTACTO · schedule diagnostic
   ============================================================= */
.contacto-section { padding: 80px 0 140px; }
.contacto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
@media (max-width: 960px) {
  .contacto-grid { grid-template-columns: 1fr; gap: 56px; }
}
.contacto-side h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 24px;
  letter-spacing: -0.01em;
  margin: 0 0 16px;
  color: var(--fg-on-dark);
}
.contacto-side p {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  color: var(--vs-papel-60);
  margin: 0 0 32px;
}
.contacto-list {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.contacto-list li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--vs-papel-08);
}
.contacto-list li:last-child { border-bottom: 0; }
.contacto-list dt {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.26em;
  color: var(--vs-papel-40);
}
.contacto-list dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--fg-on-dark);
}
.contacto-list a { color: var(--vs-terra); }

/* Calendar */
.calendar-card {
  border: 1px solid var(--vs-papel-16);
  background: rgba(242, 240, 235, 0.02);
  padding: 32px;
}
.calendar-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}
.calendar-month {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 18px;
  letter-spacing: 0.01em;
  color: var(--fg-on-dark);
}
.calendar-nav {
  display: flex;
  gap: 8px;
}
.calendar-nav button {
  width: 32px; height: 32px;
  border: 1px solid var(--vs-papel-16);
  color: var(--fg-on-dark);
  transition: all 220ms var(--ease-vs);
  font-size: 13px;
  font-family: var(--font-mono);
}
.calendar-nav button:hover {
  background: var(--vs-papel);
  color: var(--vs-abismo);
  border-color: var(--vs-papel);
}
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
}
.calendar-dow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-align: center;
  color: var(--vs-papel-40);
  padding: 6px 0 12px;
  text-transform: uppercase;
}
.calendar-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--vs-papel-60);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 180ms var(--ease-vs);
  font-variant-numeric: tabular-nums;
}
.calendar-day:not(.disabled):hover {
  border-color: var(--vs-terra);
  color: var(--fg-on-dark);
}
.calendar-day.disabled {
  color: var(--vs-papel-40);
  opacity: 0.4;
  cursor: not-allowed;
}
.calendar-day.muted {
  color: var(--vs-papel-40);
  opacity: 0.35;
}
.calendar-day.selected {
  background: var(--vs-terra);
  color: var(--vs-papel);
  border-color: var(--vs-terra);
}
.calendar-day.today {
  border-color: var(--vs-papel-16);
}

/* Time slots */
.slots-head {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--vs-papel-08);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--vs-papel-60);
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}
.slots-head .day-label {
  color: var(--vs-terra);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: none;
  font-size: 12px;
}
.slots-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}
.slot {
  padding: 12px 8px;
  border: 1px solid var(--vs-papel-16);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg-on-dark);
  text-align: center;
  transition: all 220ms var(--ease-vs);
  font-variant-numeric: tabular-nums;
}
.slot:hover {
  background: rgba(184, 113, 86, 0.08);
  border-color: var(--vs-terra);
}
.slot.selected {
  background: var(--vs-terra);
  color: var(--vs-papel);
  border-color: var(--vs-terra);
}
.slot.unavailable {
  color: var(--vs-papel-40);
  opacity: 0.35;
  cursor: not-allowed;
  text-decoration: line-through;
}
.slot.unavailable:hover {
  background: transparent;
  border-color: var(--vs-papel-16);
}

/* Contact form */
.form-row { margin-bottom: 24px; }
.form-row label {
  display: block;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.26em;
  color: var(--vs-papel-60);
  margin-bottom: 10px;
}
.form-row input,
.form-row textarea,
.form-row select {
  width: 100%;
  padding: 12px 14px;
  background: rgba(242, 240, 235, 0.02);
  border: 1px solid var(--vs-papel-16);
  color: var(--fg-on-dark);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border 220ms var(--ease-vs), background 220ms var(--ease-vs);
}
.form-row input:focus,
.form-row textarea:focus,
.form-row select:focus {
  outline: none;
  border-color: var(--vs-terra);
  background: rgba(242, 240, 235, 0.04);
}
.form-row textarea { min-height: 110px; resize: vertical; line-height: 1.5; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 540px) { .form-grid-2 { grid-template-columns: 1fr; } }

.form-summary {
  margin: 32px 0;
  padding: 20px 24px;
  border: 1px solid var(--vs-papel-16);
  background: rgba(184, 113, 86, 0.04);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}
.form-summary-label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.26em;
  color: var(--vs-papel-60);
  margin-bottom: 6px;
}
.form-summary-value {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--fg-on-dark);
}

.btn-full {
  width: 100%;
  justify-content: center;
  background: var(--vs-terra);
  color: var(--vs-papel);
  border-color: var(--vs-terra);
}
.btn-full:hover {
  background: var(--vs-papel);
  color: var(--vs-abismo);
  border-color: var(--vs-papel);
}

/* Success state */
.contacto-success {
  text-align: center;
  padding: 80px 24px;
  border: 1px solid var(--vs-papel-16);
  background: rgba(242, 240, 235, 0.02);
}
.contacto-success-mark {
  width: 60px; height: 60px;
  border: 1px solid var(--vs-terra);
  margin: 0 auto 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 28px;
  color: var(--vs-terra);
}
.contacto-success h3 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 32px;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
  color: var(--fg-on-dark);
}
.contacto-success p {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--vs-papel-60);
  margin: 0 auto 24px;
  max-width: 40ch;
  line-height: 1.6;
}
.contacto-success .summary-row {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--vs-papel-08);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--vs-papel-60);
}

/* =============================================================
   CLOSING SEAL · logo, una sola aparición — antes del footer
   ============================================================= */
.seal {
  padding: 96px 0 64px;
  text-align: center;
  position: relative;
  border-top: 1px solid var(--vs-papel-08);
  background: var(--vs-abismo);
}
.seal-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 28px;
}
.seal-coord {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--vs-papel-40);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 16px;
}
.seal-coord::before,
.seal-coord::after {
  content: "";
  width: 36px;
  height: 1px;
  background: var(--vs-papel-16);
}
.seal-mark {
  /* Black-on-transparent PNG → invert to render in papel on abismo */
  width: clamp(180px, 18vw, 280px);
  height: auto;
  filter: invert(1) brightness(1.02);
  opacity: 0.92;
  user-select: none;
  pointer-events: none;
}
.seal-tag {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  color: var(--vs-papel-40);
}

/* =============================================================
   ACCESSIBILITY
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .fade-up { opacity: 1; transform: none; }
}