/* ═══════════════════════════════════════════
   BISEL — sistema de diseño
   ═══════════════════════════════════════════ */

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

:root {
  /* Oscuro */
  --black:      #050609;
  --ink:        #0A0C11;
  --ink-2:      #0E1117;
  --ink-3:      #141822;

  /* Claro */
  --paper:      #F4F4F6;
  --paper-2:    #FFFFFF;
  --paper-line: rgba(5, 6, 9, 0.10);
  --paper-ink:  #0A0C11;
  --paper-mid:  #4E535E;
  --paper-dim:  #6A6F7A;

  /* Texto sobre oscuro */
  --text:       #F2F3F5;
  --text-mid:   #A0A6B2;
  --text-dim:   #7A8090;

  /* Acento */
  --accent:      #4B7BFF;
  --accent-ink:  #2F5BE0;   /* variante legible sobre fondo claro */
  --accent-soft: #9DBBFF;
  --accent-glow: rgba(75, 123, 255, 0.30);

  --line:      rgba(255, 255, 255, 0.10);
  --line-soft: rgba(255, 255, 255, 0.055);
  --surface:   rgba(255, 255, 255, 0.035);

  --sans: 'Inter Tight', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --ease:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-io: cubic-bezier(0.65, 0, 0.35, 1);

  --pad:     clamp(1.5rem, 5vw, 6rem);
  --shell:   1240px;
  --section: clamp(6rem, 12vw, 11rem);
}

html {
  scroll-behavior: smooth;
  background: var(--black);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--black);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  overflow-x: hidden;
  font-feature-settings: 'ss01', 'cv05';
}

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

:focus-visible {
  outline: 2px solid var(--accent-soft);
  outline-offset: 3px;
  border-radius: 4px;
}


/* ── Tipografía base ── */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.display {
  font-weight: 600;
  letter-spacing: -0.038em;
  line-height: 1.02;
}

/* Revelado por palabra.
   Sin overflow:hidden a propósito: recortar la palabra obliga a
   márgenes negativos que colapsan las cajas de línea y hacen que
   los renglones se monten entre sí. */
.word { display: inline-block; }
.word__i { display: inline-block; will-change: transform, opacity; }

.reveal-up { will-change: transform, opacity; }

/* ── Botones ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 100px;
  padding: 0.85rem 1.6rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.3s var(--ease), color 0.3s var(--ease),
              border-color 0.3s var(--ease), transform 0.3s var(--ease),
              box-shadow 0.3s var(--ease);
}

.btn--primary {
  background: var(--text);
  color: var(--black);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.45);
}

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}
.btn--ghost:hover {
  border-color: rgba(255, 255, 255, 0.28);
  background: var(--surface);
  transform: translateY(-2px);
}

.btn--light { margin-top: 2rem; }
.btn--block { width: 100%; }

.btn__arrow {
  display: inline-block;
  transition: transform 0.35s var(--ease);
}
.btn:hover .btn__arrow { transform: translateX(4px); }

/* ═══ NAV ═══ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.1rem var(--pad);
  transition: background 0.45s var(--ease), border-color 0.45s var(--ease),
              padding 0.45s var(--ease);
  border-bottom: 1px solid transparent;
}

.nav--scrolled {
  background: rgba(5, 6, 9, 0.72);
  backdrop-filter: blur(28px) saturate(1.4);
  -webkit-backdrop-filter: blur(28px) saturate(1.4);
  border-bottom-color: var(--line-soft);
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
}

/* Nav invertida sobre secciones claras */
.nav--light { color: var(--paper-ink); }
.nav--light.nav--scrolled {
  background: rgba(244, 244, 246, 0.78);
  border-bottom-color: var(--paper-line);
}
.nav--light .nav__name,
.nav--light .nav__links a,
.nav--light .burger span { color: var(--paper-ink); }
.nav--light .burger span { background: var(--paper-ink); }
.nav--light .nav__suffix { color: var(--paper-dim); }
.nav--light .nav__links a { color: var(--paper-mid); }
.nav--light .nav__links a:hover { color: var(--paper-ink); }
.nav--light .nav__cta { background: var(--paper-ink); color: var(--paper); }

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: inherit;
}

.nav__mark {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(75, 123, 255, 0.14), 0 0 16px var(--accent-glow);
  flex: none;
}

.nav__name {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--text);
}

/* El acompañante del lockup: mismo tamaño y tracking, menos peso y
   menos contraste, para que "BISEL" siga leyéndose primero. */
.nav__suffix {
  font-weight: 400;
  color: var(--text-dim);
  transition: color 0.35s var(--ease);
}

.nav__links {
  display: flex;
  gap: 2.5rem;
  margin-left: auto;
}

.nav__links a {
  position: relative;
  font-size: 0.86rem;
  color: var(--text-mid);
  text-decoration: none;
  transition: color 0.25s;
}
.nav__links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -5px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.4s var(--ease);
}
.nav__links a:hover { color: var(--text); }
.nav__links a:hover::after { transform: scaleX(1); transform-origin: left; }

.nav__cta {
  font-size: 0.84rem;
  font-weight: 500;
  color: var(--black);
  background: var(--text);
  padding: 0.55rem 1.2rem;
  border-radius: 100px;
  text-decoration: none;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.nav__cta:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(0,0,0,.4); }

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px; height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
}
.burger span {
  display: block;
  width: 22px; height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.4s var(--ease), opacity 0.3s;
}
.burger[aria-expanded="true"] span:first-child { transform: translateY(3.75px) rotate(45deg); }
.burger[aria-expanded="true"] span:last-child  { transform: translateY(-3.75px) rotate(-45deg); }

.menu {
  position: fixed;
  inset: 0;
  z-index: 350;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 0.5rem;
  padding: 0 var(--pad);
  background: rgba(5, 6, 9, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}
.menu[hidden] { display: none; }
.menu a {
  font-size: clamp(2rem, 9vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  color: var(--text);
  text-decoration: none;
  padding: 0.35rem 0;
}
.menu__cta {
  margin-top: 1.5rem;
  font-size: 0.95rem !important;
  font-weight: 500 !important;
  letter-spacing: 0 !important;
  color: var(--accent-soft) !important;
}

/* ═══ HERO ═══ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem var(--pad) 6rem;
  overflow: hidden;
  background: var(--black);
}

.hero__field {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  display: grid;
  place-items: center;
}

.hero__glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 55% at 50% 42%, rgba(75, 123, 255, 0.16) 0%, transparent 62%),
    radial-gradient(ellipse 90% 60% at 50% 108%, rgba(75, 123, 255, 0.10) 0%, transparent 60%);
}

.orbit {
  width: min(150vh, 128vw);
  height: auto;
  opacity: 0.5;
  overflow: visible;
}
.orbit__ring {
  fill: none;
  stroke: rgba(255, 255, 255, 0.055);
  stroke-width: 1;
}
.orbit__ring--dashed {
  stroke: rgba(157, 187, 255, 0.13);
  stroke-dasharray: 1 14;
}
.orbit__spin {
  transform-origin: 400px 400px;
  fill: var(--accent-soft);
}
.orbit__spin--a { animation: spin 34s linear infinite; opacity: 0.85; }
.orbit__spin--b { animation: spin 22s linear infinite reverse; opacity: 0.6; }
.orbit__spin--c { animation: spin 46s linear infinite; opacity: 0.45; }

@keyframes spin { to { transform: rotate(360deg); } }

.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 1020px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.65rem;
}

.hero__title {
  font-size: clamp(2.1rem, 4.4vw, 3.9rem);
  font-weight: 600;
  letter-spacing: -0.042em;
  line-height: 1.05;
  max-width: 21ch;
  text-wrap: balance;
}

.hero__title em {
  font-style: normal;
  color: var(--accent-soft);
  position: relative;
}

.hero__sub {
  font-size: clamp(1rem, 1.35vw, 1.16rem);
  line-height: 1.62;
  color: var(--text-mid);
  max-width: 60ch;
  text-wrap: pretty;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 0.75rem;
}

.scroll-cue {
  position: absolute;
  bottom: 2.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
}
.scroll-cue__text {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.scroll-cue__line {
  position: relative;
  width: 1px; height: 48px;
  background: var(--line-soft);
  overflow: hidden;
}
.scroll-cue__line::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, var(--accent-soft));
  animation: cue 2.4s var(--ease-io) infinite;
}
@keyframes cue {
  0%   { transform: translateY(-100%); }
  55%  { transform: translateY(100%); }
  100% { transform: translateY(100%); }
}

/* ═══ EVIDENCIA ═══ */
.evidence {
  position: relative;
  z-index: 2;
  background: var(--ink);
  border-top: 1px solid var(--line-soft);
  padding: clamp(4rem, 8vw, 7rem) var(--pad);
}

.evidence__label {
  max-width: var(--shell);
  margin: 0 auto 3.25rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-dim);
}

.evidence__grid {
  max-width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.stat {
  background: var(--ink);
  padding: 2.5rem 2rem 2.75rem;
}

.stat__num {
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  font-size: clamp(3rem, 6vw, 4.75rem);
  font-weight: 600;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}
.stat__arrow {
  font-size: 0.4em;
  color: var(--accent-soft);
  font-weight: 400;
  transform: translateY(-0.35em);
}
.stat__unit {
  margin-top: 0.65rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-soft);
}
.stat__text {
  margin-top: 1.1rem;
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--text-mid);
  max-width: 32ch;
}

/* ═══ MANIFIESTO ═══ */
.manifesto {
  background: var(--ink);
  padding: clamp(6rem, 14vw, 12rem) var(--pad);
  border-top: 1px solid var(--line-soft);
}

.manifesto__text {
  max-width: 20ch;
  margin: 0 auto;
  text-align: center;
  font-size: clamp(2rem, 5.4vw, 4.2rem);
  font-weight: 600;
  letter-spacing: -0.042em;
  line-height: 1.06;
  text-wrap: balance;
}

/* ═══ RECORRIDO ═══ */
/* Antes era un pin de 520vh con scrub. Cinco pantallas de scroll
   secuestrado para llegar al final. Ahora ocupa una sola pantalla y
   el control es del usuario: los pasos avanzan solos pero se pueden
   clicar, y el scroll de la página nunca se toca. */
.story {
  position: relative;
  overflow: hidden;
  padding: clamp(3.5rem, 6vw, 5.5rem) var(--pad);
  min-height: 100svh;
  display: flex;
  align-items: center;
}

.story__bg { position: absolute; inset: 0; z-index: 0; background: var(--black); }
.story__gradient {
  position: absolute;
  inset: 0;
  transition: opacity 0.9s var(--ease);
  will-change: opacity;
}

.story__gradient--a {
  opacity: 1;
  background:
    radial-gradient(ellipse 80% 60% at 70% 40%, rgba(75, 123, 255, 0.13) 0%, transparent 64%),
    linear-gradient(165deg, #06070B 0%, #0F131C 52%, #090B11 100%);
}
.story__gradient--b {
  opacity: 0;
  background:
    radial-gradient(ellipse 70% 55% at 66% 36%, rgba(60, 110, 190, 0.17) 0%, transparent 64%),
    linear-gradient(160deg, #070A11 0%, #121A2C 55%, #0A0D15 100%);
}
.story__gradient--c {
  opacity: 0;
  background:
    radial-gradient(ellipse 62% 52% at 72% 38%, rgba(110, 140, 220, 0.14) 0%, transparent 60%),
    linear-gradient(155deg, #08090F 0%, #151928 50%, #0D101A 100%);
}

.story__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(1.1rem, 2vw, 1.75rem);
  text-align: center;
}

.story__head { width: 100%; max-width: 48rem; }

/* ── Rail de pasos ── */
.steps {
  display: flex;
  justify-content: center;
  gap: 0.4rem;
  margin-top: 1.3rem;
  border-top: 1px solid var(--line-soft);
  padding-top: 0.9rem;
}

.step-btn {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.3rem;
  padding: 0.15rem 0 0.95rem;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--sans);
  color: var(--text-dim);
  transition: color 0.35s var(--ease);
}
.step-btn:hover { color: var(--text-mid); }
.step-btn.is-active { color: var(--text); }

.step-btn__num {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.12em;
  color: inherit;
  opacity: 0.7;
}

.step-btn__label {
  transition: color 0.35s var(--ease);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: -0.012em;
  line-height: 1.2;
  color: inherit;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}
.step-btn.is-active .step-btn__label { color: var(--text); }

.step-btn__bar {
  position: absolute;
  left: 0; right: 0.4rem; bottom: 0;
  height: 3px;
  background: var(--line-soft);
  border-radius: 3px;
  overflow: hidden;
}
.step-btn__bar i {
  display: block;
  height: 100%;
  width: 100%;
  background: var(--accent-soft);
  transform: scaleX(0);
  transform-origin: left;
}
.step-btn.is-done .step-btn__bar i { transform: scaleX(1); opacity: 0.35; }

/* ── Diagrama anotado ──
   El texto del paso se escribe al lado de la caja que ese paso
   transforma. Antes vivía en una columna aparte y la gente miraba el
   dibujo sin registrar que el contenido cambiaba fuera de su foco. */
.diagram { width: 100%; display: flex; justify-content: center; }

.diagram__stage {
  position: relative;
  width: 100%;
  max-width: 66rem;
  display: flex;
  justify-content: center;
}

.system { width: 100%; max-width: 26rem; height: auto; overflow: visible; }
.layer { will-change: transform, opacity; }

.story__chapters { position: absolute; inset: 0; pointer-events: none; }

.chapter {
  position: absolute;
  width: 19rem;
  text-align: left;
  will-change: opacity, transform;
}
.chapter > * { pointer-events: auto; }

/* Los porcentajes calzan con el centro de cada caja del viewBox 560×560:
   fila de arriba en 30.2%, fila de abajo en 69.8%. El recorrido del ojo
   da la vuelta al diagrama en vez de quedarse en un costado. */
.at-erp, .at-legacy { top: 30.2%; transform: translateY(-50%); }
.at-manual, .at-int { top: 69.8%; transform: translateY(-50%); }

.at-erp, .at-manual {
  right: calc(50% + 14rem);
  text-align: right;
  padding-right: 1rem;
  border-right: 1px solid rgba(157, 187, 255, 0.32);
}
.at-legacy, .at-int {
  left: calc(50% + 14rem);
  padding-left: 1rem;
  border-left: 1px solid rgba(157, 187, 255, 0.32);
}

/* El punto que ancla el bloque a su caja */
.chapter::after {
  content: '';
  position: absolute;
  top: 50%;
  width: 6px; height: 6px;
  margin-top: -3px;
  border-radius: 50%;
  background: var(--accent-soft);
}
.at-erp::after, .at-manual::after   { right: -3.5px; }
.at-legacy::after, .at-int::after   { left: -3.5px; }

.chapter__tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 0.7rem;
}

.chapter__title {
  font-size: clamp(1.2rem, 1.6vw, 1.55rem);
  font-weight: 600;
  letter-spacing: -0.028em;
  line-height: 1.18;
  margin-bottom: 0.7rem;
  text-wrap: balance;
}

.chapter__body {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--text-mid);
  text-wrap: pretty;
}

.chapter__cta { margin-top: 1.2rem; }

.svg-label {
  font-family: var(--mono);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.1em;
  fill: rgba(255, 255, 255, 0.5);
}
.svg-label--intel {
  font-size: 7.5px;
  letter-spacing: 0.2em;
  fill: rgba(157, 187, 255, 0.65);
}
.svg-label--status {
  font-size: 9px;
  letter-spacing: 0.04em;
  fill: rgba(255, 255, 255, 0.62);
}

/* ═══ SERVICIOS — sección clara ═══ */
.services {
  background: var(--paper);
  color: var(--paper-ink);
  padding: var(--section) var(--pad);
}

.services__header {
  max-width: var(--shell);
  margin: 0 auto clamp(4rem, 8vw, 7rem);
}
.services .eyebrow { color: var(--paper-dim); }

.services__title {
  margin-top: 1.25rem;
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  font-weight: 600;
  letter-spacing: -0.042em;
  line-height: 1.04;
  max-width: 18ch;
  text-wrap: balance;
}

.service {
  max-width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 20rem 1fr;
  gap: clamp(2rem, 5vw, 5rem);
  padding: clamp(3rem, 6vw, 5.5rem) 0;
  border-top: 1px solid var(--paper-line);
}

.service__aside {
  position: sticky;
  top: 7.5rem;
  align-self: start;
}

.service__num {
  display: block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--accent-ink);
  margin-bottom: 0.85rem;
}

.service__name {
  font-size: clamp(1.2rem, 1.7vw, 1.5rem);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.15;
  text-wrap: balance;
}

.service__hook {
  font-size: clamp(1.4rem, 2.7vw, 2.15rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.12;
  margin-bottom: 2.75rem;
  max-width: 22ch;
  text-wrap: balance;
}

.service__cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem 3rem;
  margin-bottom: 2.5rem;
}

.service__col h4,
.service__do h4 {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--paper-dim);
  margin-bottom: 0.85rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--paper-line);
}

.service__col p,
.service__do p {
  font-size: 0.95rem;
  line-height: 1.68;
  color: var(--paper-mid);
}

.service__do { margin-bottom: 2.25rem; max-width: 62ch; }
.service__do h4 { color: var(--accent-ink); border-bottom-color: rgba(47, 91, 224, 0.3); }
.service__do p { color: var(--paper-ink); }

.result {
  display: flex;
  align-items: baseline;
  gap: 1.5rem;
  padding: 1.75rem 2rem;
  background: var(--paper-ink);
  color: var(--paper-2);
  border-radius: 16px;
}
.result__tag {
  flex: none;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-soft);
}
.result__text {
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  font-weight: 500;
  letter-spacing: -0.018em;
  line-height: 1.45;
}

/* ═══ PROCESO — sección clara ═══ */
.process {
  background: var(--paper-2);
  color: var(--paper-ink);
  padding: var(--section) var(--pad);
  border-top: 1px solid var(--paper-line);
}
.process .eyebrow { color: var(--paper-dim); }

.process__header {
  max-width: var(--shell);
  margin: 0 auto clamp(3rem, 6vw, 5rem);
}
.process__title {
  margin-top: 1.25rem;
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  font-weight: 600;
  letter-spacing: -0.042em;
  line-height: 1.04;
}

.process__list {
  max-width: var(--shell);
  margin: 0 auto;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--paper-line);
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}

.step {
  background: var(--paper-2);
  padding: 2.25rem 1.75rem 2.5rem;
  transition: background 0.4s var(--ease);
}
.step:hover { background: var(--paper); }

.step__num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--accent-ink);
}
.step h3 {
  margin: 1.35rem 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.028em;
}
.step p {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--paper-mid);
}

/* ═══ TECNOLOGÍAS ═══ */
.tech {
  background: var(--ink);
  padding: var(--section) var(--pad);
  border-top: 1px solid var(--line-soft);
}

.tech__inner { max-width: var(--shell); margin: 0 auto; }

.tech__title {
  margin: 1.25rem 0 clamp(2.5rem, 5vw, 4rem);
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.12;
  max-width: 26ch;
  text-wrap: balance;
}

.tech__grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.tech__item {
  display: grid;
  place-items: center;
  background: var(--ink);
  padding: 2.25rem 1.5rem;
  min-height: 7rem;
}

/* Un solo color para todos. Los logotipos llegan en colores, formatos y
   proporciones distintas; amontonarlos tal cual sobre fondo oscuro se ve
   amateur. brightness(0) los aplana a negro e invert(1) los sube a blanco
   puro, venga como venga el archivo. */
.tech__item img {
  max-width: 100%;
  max-height: 2.5rem;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.5;
  transition: opacity 0.35s var(--ease);
}
.tech__item:hover img { opacity: 1; }

/* Equilibrio óptico. Normalizar todos a la misma altura de caja no basta:
   en unos logotipos la palabra llena la caja y en otros comparte sitio con
   un icono (AWS y su sonrisa, Power BI y sus barras) o va en dos líneas
   (Power Automate). Sin este ajuste esos tres se leen más chicos. */
.tech__item--medio img { max-height: 3rem; }
.tech__item--alto img  { max-height: 3.4rem; }

/* ═══ CONTACTO ═══ */
.contact {
  background:
    radial-gradient(ellipse 65% 55% at 50% 0%, rgba(75, 123, 255, 0.12) 0%, transparent 62%),
    var(--black);
  padding: var(--section) var(--pad);
}

.contact__inner {
  max-width: var(--shell);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 7vw, 7rem);
  align-items: start;
}

.contact__title {
  margin: 1.25rem 0 1.35rem;
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.042em;
  line-height: 1.05;
  max-width: 15ch;
  text-wrap: balance;
}

.contact__sub {
  font-size: 1.02rem;
  line-height: 1.62;
  color: var(--text-mid);
  max-width: 40ch;
}

.contact__form { display: flex; flex-direction: column; gap: 1.15rem; }

.field label {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.55rem;
}

.field input,
.field textarea {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  font-family: var(--sans);
  font-size: 0.96rem;
  padding: 0.9rem 1.1rem;
  outline: none;
  resize: vertical;
  transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
}
.field input::placeholder,
.field textarea::placeholder { color: var(--text-dim); }

.field input:focus,
.field textarea:focus {
  border-color: rgba(75, 123, 255, 0.55);
  background: rgba(75, 123, 255, 0.05);
  box-shadow: 0 0 0 4px rgba(75, 123, 255, 0.10);
}

.field input:user-invalid,
.field textarea:user-invalid { border-color: rgba(255, 120, 120, 0.5); }

.contact__form .btn { margin-top: 0.4rem; }

/* Fuera de pantalla pero enfocable por un bot que rellena todo */
.field--trap {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.form__note {
  min-height: 1.2rem;
  font-size: 0.85rem;
  color: var(--text-mid);
  transition: color 0.25s var(--ease);
}
.form__note[data-estado="ok"]    { color: var(--accent-soft); }
.form__note[data-estado="error"] { color: #FF9B9B; }

.contact__form .btn:disabled { opacity: 0.55; cursor: progress; }

.contact__mail {
  display: inline-block;
  margin-top: 1.6rem;
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.008em;
  color: var(--text);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid rgba(157, 187, 255, 0.35);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.contact__mail:hover { color: var(--accent-soft); border-bottom-color: var(--accent-soft); }

/* ═══ FOOTER ═══ */
/* Sin logotipo: la marca ya está en la barra superior y repetirla al
   pie solo la abarata. El copyright basta para firmar la página. */
.footer {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 1.5rem 2rem;
  padding: 2.25rem var(--pad);
  border-top: 1px solid var(--line-soft);
  background: var(--black);
}
.footer__note,
.footer__copy {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--text-dim);
}
.footer__note { text-align: left; }

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1200px) {
  /* Sin ancho a los lados, el bloque del paso baja bajo el diagrama y
     los cinco vuelven a apilarse en la misma celda. */
  .diagram__stage { flex-direction: column; align-items: center; gap: 2rem; max-width: 30rem; }
  .story__chapters {
    position: static;
    display: grid;
    width: 100%;
  }
  .chapter {
    position: static;
    grid-area: 1 / 1;
    width: 100%;
    transform: none;
    text-align: left;
    padding: 0 0 0 1rem;
    border-left: 1px solid rgba(157, 187, 255, 0.32);
    border-right: none;
  }
  .at-erp, .at-manual {
    text-align: left;
    padding: 0 0 0 1rem;
    border-right: none;
    border-left: 1px solid rgba(157, 187, 255, 0.32);
  }
  .chapter::after { top: 0; margin-top: 6px; }
  .at-erp::after, .at-manual::after,
  .at-legacy::after, .at-int::after { left: -3.5px; right: auto; }
  .chapter__title { font-size: clamp(1.35rem, 4vw, 1.7rem); }
}

@media (max-width: 1100px) {
  .service { grid-template-columns: 14rem 1fr; }
  .process__list { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 960px) {
  .story { min-height: 0; padding-top: clamp(4rem, 10vw, 6rem); }

  /* El rail pasa a scroll horizontal para no aplastar las etiquetas */
  .steps {
    gap: 0.75rem;
    min-width: 0;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .steps::-webkit-scrollbar { display: none; }
  .steps { justify-content: flex-start; }
  .step-btn { flex: 0 0 auto; min-width: 8.5rem; }
  .step-btn__label { white-space: normal; }

  .tech__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .evidence__grid { grid-template-columns: 1fr; }
  .service { grid-template-columns: 1fr; gap: 1.75rem; }
  .service__aside { position: static; display: flex; align-items: baseline; gap: 1rem; }
  .service__num { margin-bottom: 0; }
  .service__cols { grid-template-columns: 1fr; gap: 1.75rem; }
  .contact__inner { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav__links, .nav__cta { display: none; }
  .burger { display: flex; }
  .hero { padding-top: 7rem; }
  .result { flex-direction: column; gap: 0.85rem; }
  .process__list { grid-template-columns: 1fr; }
  .tech__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tech__item { padding: 1.5rem 0.85rem; min-height: 5.5rem; }
  /* Con la celda estrecha manda el tope de ancho, así que los ajustes
     ópticos del escritorio desbalancean al revés: los logotipos anchos
     quedan diminutos y los cuadrados enormes. Aquí se recortan. */
  .tech__item--medio img,
  .tech__item--alto img { max-height: 2.6rem; }
  .footer {
    grid-template-columns: 1fr;
    justify-items: center;
    text-align: center;
  }
  .footer__note { text-align: center; }
}

@media (max-width: 420px) {
  .hero__actions { flex-direction: column; align-self: stretch; }
  .hero__actions .btn { width: 100%; }
}

/* ═══ ACCESIBILIDAD ═══ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .scroll-cue__line::after { display: none; }
}