/* =============================================================
   HELICOIDALES ING · hoja de estilo
   Arquetipo: 3D cinemático (adaptado a luz / plano de ingeniería)
   Paleta de marca: azul marino #14213D + acero claro #5C6B7A sobre blanco
   ============================================================= */

/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  --navy:        #14213D;   /* color principal: titulares, logo, clave */
  --navy-deep:   #0C1428;   /* fondo de la sección oscura y del pie */
  --steel:       #5C6B7A;   /* apoyo: subtítulos, líneas, secundario */
  --steel-soft:  #8794A1;
  --bg:          #ffffff;   /* fondo predominante */
  --bg-2:        #eef1f5;   /* gris plano suave (bordes del hero) */
  --bg-3:        #f5f7f9;   /* secciones alternas */
  --paper:       #ffffff;
  --ink:         #14213D;
  --ink-soft:    #3a4557;
  --line:        rgba(20, 33, 61, 0.14);
  --line-strong: rgba(20, 33, 61, 0.30);
  --cream:       #f2ebda;

  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --serif: "IBM Plex Serif", Georgia, "Times New Roman", Cambria, serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --wrap: 1180px;
  --gutter: clamp(1.15rem, 4vw, 3.25rem);
  --sec-y: clamp(4.5rem, 10vw, 9rem);
}

/* =============================================================
   2. Reset & base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  overflow-x: clip;
  scroll-behavior: smooth;
}
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.62;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
}
img, svg, canvas, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.06; letter-spacing: -0.015em; font-weight: 500; }
table { border-collapse: collapse; width: 100%; }
::selection { background: var(--navy); color: #fff; }

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

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

/* =============================================================
   3. Utilities
   ============================================================= */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.sr-only, .skip-link {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: -100px; left: 1rem;
  width: auto; height: auto; clip: auto;
  padding: 0.7rem 1.1rem;
  background: var(--navy); color: #fff;
  z-index: 9999; font-weight: 500;
  transition: top 0.2s var(--ease-out);
}
.skip-link:focus { top: 1rem; }

.section { padding-block: var(--sec-y); }
.reveal { opacity: 1; }
.js .reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
  will-change: opacity, transform;
}
.js .reveal.is-visible { opacity: 1; transform: none; }
/* Defensa: un elemento .reveal con texto partido nunca queda invisible */
.reveal[data-split] { opacity: 1; transform: none; }

.kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--steel);
  margin-bottom: 1.3rem;
}
.kicker--light { color: rgba(242, 235, 218, 0.62); }

.sub { font-size: 0.72em; vertical-align: 0.15em; letter-spacing: 0; }

/* =============================================================
   4. Typography scale
   ============================================================= */
.hero-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(2.6rem, 7.4vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--navy);
  max-width: 15ch;
}
.hero-title em { font-style: italic; font-weight: 400; }

.section-title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(1.8rem, 3.6vw, 2.9rem);
  color: var(--navy);
  max-width: 24ch;
}
.lead-serif {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.4rem, 2.9vw, 2.15rem);
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--navy);
}
.lead-serif em { font-style: italic; }

/* =============================================================
   5. Components
   ============================================================= */
.btn {
  --bpad-y: 0.95rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: var(--bpad-y) 1.6rem;
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid var(--navy);
  transition: background 0.3s var(--ease-out), color 0.3s var(--ease-out),
              transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out),
              border-color 0.3s var(--ease-out);
}
.btn-solid { background: var(--navy); color: #fff; }
.btn-solid:hover,
.btn-solid:focus-visible {
  background: #24365c;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -10px rgba(20, 33, 61, 0.5);
}
.btn-ghost { background: transparent; color: var(--navy); }
.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--navy);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px -10px rgba(20, 33, 61, 0.4);
}
.btn:active { transform: translateY(0); }
.btn-block { width: 100%; }

/* =============================================================
   6. Nav
   ============================================================= */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 200;
  transition: background 0.4s var(--ease-out), border-color 0.4s var(--ease-out),
              backdrop-filter 0.4s var(--ease-out);
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--line);
}
.nav-inner {
  max-width: var(--wrap);
  margin-inline: auto;
  padding: 0.9rem var(--gutter);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}
.nav-brand { display: flex; align-items: center; gap: 0.6rem; }
.nav-mark { width: 46px; height: auto; }
.nav-word {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.02rem;
  letter-spacing: 0.02em;
  color: var(--navy);
}
.nav-word-ing { color: var(--steel); }
.nav-links {
  display: none;
  margin-left: auto;
  gap: 0.4rem;
  font-size: 0.9rem;
}
.nav-links a {
  color: var(--ink-soft);
  position: relative;
  padding: 0.45rem 0.8rem;
  transition: color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0.8rem; right: 0.8rem; bottom: 0.2rem;
  height: 1px;
  background: var(--navy);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease-out);
}
.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--navy);
  background: rgba(20, 33, 61, 0.06);
}
.nav-links a:hover::after,
.nav-links a:focus-visible::after { transform: scaleX(1); }
.nav-cta { display: none; --bpad-y: 0.7rem; }

.nav-toggle {
  margin-left: auto;
  width: 44px; height: 44px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  width: 22px; height: 1.5px;
  background: var(--navy);
  transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
}
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.25px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.25px) rotate(-45deg); }

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.5rem var(--gutter) 1.6rem;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-menu[hidden] { display: none; }
.nav-menu a {
  padding: 0.85rem 0;
  font-size: 1.05rem;
  color: var(--navy);
  border-bottom: 1px solid var(--line);
}
.nav-menu a.btn { border: 1px solid var(--navy); margin-top: 0.8rem; }

/* =============================================================
   7. Hero
   ============================================================= */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--bg-2);
}
.hero-grid {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 4vw, 2.5rem);
}
.hero-inner {
  position: relative;
  z-index: 3;
  align-self: center;
  padding-top: 6.5rem;
}
.hero-visual {
  position: relative;
  order: 2;
  min-height: 44vh;
}
.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease 0.15s;
}
.hero.has-3d .hero-canvas { opacity: 1; }
.hero.has-3d .hero-watermark { display: none; }

.hero-watermark {
  position: absolute;
  inset: 8%;
  margin: auto;
  width: auto;
  max-height: 82%;
  opacity: 0.07;
  filter: grayscale(1);
  pointer-events: none;
}
.hero-inner .kicker { color: var(--steel); margin-bottom: 1.7rem; }
.hero-sub {
  margin-top: 1.9rem;
  max-width: 44ch;
  font-size: clamp(0.9rem, 1vw, 1rem);
  line-height: 1.7;
  color: var(--ink-soft);
}
.hero-sub em {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  color: var(--navy);
}
.hero-actions {
  margin-top: 2.4rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}
.hero-cue {
  position: absolute;
  left: 50%;
  bottom: 2rem;
  transform: translateX(-50%);
  z-index: 3;
  width: 24px; height: 46px;
  display: grid;
  place-items: start center;
}
.hero-cue-line {
  width: 1px; height: 34px;
  background: var(--steel);
  transform-origin: top;
  animation: cueSlide 2.1s var(--ease-soft) infinite;
}
@keyframes cueSlide {
  0% { transform: scaleY(0); opacity: 0; }
  35% { transform: scaleY(1); opacity: 1; }
  70%, 100% { transform: scaleY(1) translateY(34px); opacity: 0; }
}

/* =============================================================
   8. Esencia
   ============================================================= */
.esencia { border-bottom: 1px solid var(--line); }
.esencia-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem 3rem;
}
.col-num {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--steel-soft);
}
.lead-support {
  margin-top: 1.6rem;
  max-width: 54ch;
  font-size: 1.06rem;
  color: var(--ink-soft);
}
.traits {
  margin-top: 2.5rem;
  list-style: none;
  display: grid;
  gap: 0.9rem;
  max-width: 52ch;
}
.traits li {
  font-size: 0.98rem;
  color: var(--ink-soft);
  padding-left: 1.1rem;
  border-left: 2px solid var(--line-strong);
}
.trait-k {
  display: inline-block;
  min-width: 6.5rem;
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--navy);
}

/* =============================================================
   9. Section head
   ============================================================= */
.section-head { margin-bottom: clamp(2.5rem, 6vw, 4.5rem); max-width: 40rem; }
.section-note, .section-note {
  margin-top: 1.2rem;
  color: var(--ink-soft);
  max-width: 48ch;
}

/* =============================================================
   10. Servicios
   ============================================================= */
.servicios { background: var(--bg-3); }
.svc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
.svc-card {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: clamp(1.6rem, 4vw, 2.75rem);
  display: flex;
  flex-direction: column;
  transition: border-color 0.4s var(--ease-out), transform 0.4s var(--ease-out);
}
.svc-card:hover { border-color: var(--line-strong); transform: translateY(-4px); }
.svc-index {
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  color: var(--steel-soft);
  margin-bottom: 1.4rem;
}
.svc-title {
  font-family: var(--serif);
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  color: var(--navy);
  margin-bottom: 0.9rem;
}
.svc-text { color: var(--ink-soft); font-size: 1rem; }
.svc-list {
  margin: 1.5rem 0 2rem;
  list-style: none;
  display: grid;
  gap: 0.6rem;
}
.svc-list li {
  position: relative;
  padding-left: 1.4rem;
  font-size: 0.94rem;
  color: var(--ink-soft);
}
.svc-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 7px; height: 7px;
  border: 1px solid var(--navy);
}
.svc-link {
  margin-top: auto;
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--navy);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 0.35rem;
  align-self: flex-start;
  transition: border-color 0.3s var(--ease-out);
}
.svc-link:hover { border-color: var(--navy); }

/* =============================================================
   11. Proceso
   ============================================================= */
.steps { list-style: none; display: grid; gap: clamp(2.5rem, 7vw, 5.5rem); }
.step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: center;
}
.step-media {
  overflow: hidden;
}
.step-media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 500px;
  object-fit: contain;
  transition: transform 0.6s var(--ease-out);
}
.step:hover .step-media img { transform: scale(1.02); }

/* Paso 4: dos imágenes apiladas, compactas, en la columna de la derecha */
.step-media--stack {
  display: grid;
  gap: 0.9rem;
  align-content: center;
}
.step-media--stack > img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 190px;
  object-fit: contain;
}
.rot90-box {
  height: 150px;
  display: grid;
  place-items: center;
  overflow: hidden;
}
.rot90-box img {
  width: 150px;
  height: auto;
  transform: rotate(90deg);
}
.step:hover .rot90-box img { transform: rotate(90deg); }
.step-num {
  font-family: var(--mono);
  font-size: 0.85rem;
  letter-spacing: 0.16em;
  color: var(--steel-soft);
  margin-bottom: 0.9rem;
}
.step-title {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 2.3vw, 1.6rem);
  color: var(--navy);
  margin-bottom: 0.7rem;
}
.step-text p { color: var(--ink-soft); max-width: 40ch; }

/* =============================================================
   12. Capacidad
   ============================================================= */
.capacidad { background: var(--navy); color: var(--cream); }
.capacidad .section-title, .capacidad .kicker { color: #fff; }
.capacidad .kicker { color: rgba(255,255,255,0.55); }
.stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  padding-block: clamp(2rem, 5vw, 3rem);
  border-top: 1px solid rgba(255,255,255,0.16);
  border-bottom: 1px solid rgba(255,255,255,0.16);
}
.stat-num {
  font-family: var(--serif);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 500;
  color: #fff;
  line-height: 1;
}
.stat-label {
  margin-top: 0.7rem;
  font-size: 0.9rem;
  color: rgba(242, 235, 218, 0.68);
  max-width: 26ch;
}
.spec { margin-top: clamp(2.5rem, 6vw, 4rem); }
.spec-table { font-size: 0.95rem; }
.spec-table th, .spec-table td {
  text-align: left;
  vertical-align: top;
  padding: 1rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}
.spec-table th {
  width: 42%;
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.9);
}
.spec-table td { color: rgba(242, 235, 218, 0.78); padding-left: 1rem; }
.spec-foot {
  margin-top: 1.6rem;
  font-size: 0.9rem;
  color: rgba(242, 235, 218, 0.6);
}

/* =============================================================
   13. Comparativa
   ============================================================= */
.compara-grid {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
}
.compara-col { padding: clamp(1.6rem, 4vw, 2.5rem); }
.compara-col--manual { background: var(--bg-3); border-bottom: 1px solid var(--line); }
.compara-col--ing { background: var(--paper); }
.compara-k {
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 1.4rem;
}
.compara-col--manual .compara-k { color: var(--steel); }
.compara-col--ing .compara-k { color: var(--navy); }
.compara-col ul { list-style: none; display: grid; gap: 0.85rem; }
.compara-col li {
  padding-left: 1.4rem;
  position: relative;
  font-size: 0.96rem;
  color: var(--ink-soft);
}
.compara-col--manual li::before {
  content: "—";
  position: absolute; left: 0;
  color: var(--steel-soft);
}
.compara-col--ing li::before {
  content: "";
  position: absolute; left: 0; top: 0.55em;
  width: 8px; height: 8px;
  background: var(--navy);
}
.compara-close {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  line-height: 1.38;
  color: var(--navy);
  max-width: 44ch;
}

/* =============================================================
   14. Contacto
   ============================================================= */
.contacto { background: var(--navy-deep); color: var(--cream); }
.contacto-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2.5rem, 6vw, 4.5rem);
}
.contacto-title { color: #fff; }
.contacto-lead {
  margin-top: 1.3rem;
  color: rgba(242, 235, 218, 0.72);
  max-width: 42ch;
}
.contacto-direct {
  margin-top: 2.4rem;
  list-style: none;
  display: grid;
  gap: 1rem;
  font-size: 0.95rem;
}
.contacto-direct li { display: flex; gap: 1rem; align-items: baseline; }
.cd-k {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(242, 235, 218, 0.5);
  min-width: 5.5rem;
}
.contacto-direct a {
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  padding-bottom: 2px;
  transition: border-color 0.3s var(--ease-out);
}
.contacto-direct a:hover { border-color: #fff; }

.form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
}
.field { display: flex; flex-direction: column; gap: 0.45rem; }
.field--full { grid-column: 1 / -1; }
.field label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(242, 235, 218, 0.6);
}
.field input,
.field select,
.field textarea {
  font: inherit;
  font-size: 0.95rem;
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 0.8rem 0.9rem;
  border-radius: 0;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}
.field textarea { resize: vertical; min-height: 6.5rem; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.08);
}
.field select option { color: #14213D; }
.field input::placeholder,
.field textarea::placeholder { color: rgba(242, 235, 218, 0.35); }

.form .btn-solid {
  grid-column: 1 / -1;
  background: var(--cream);
  color: var(--navy);
  border-color: var(--cream);
  margin-top: 0.4rem;
}
.form .btn-solid:hover,
.form .btn-solid:focus-visible {
  background: #fff;
  border-color: #fff;
  box-shadow: 0 12px 34px -10px rgba(242, 235, 218, 0.4);
}
.btn-check {
  width: 0;
  overflow: hidden;
  opacity: 0;
  transition: width 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
}
.form.is-sent .btn-check { width: 20px; opacity: 1; }
.form.is-sent .btn-label::after { content: "iado"; }
.form-note {
  grid-column: 1 / -1;
  font-size: 0.82rem;
  color: rgba(242, 235, 218, 0.55);
}
.form.is-sent .form-note { color: rgba(242, 235, 218, 0.9); }

/* =============================================================
   15. Footer
   ============================================================= */
.footer { background: var(--navy-deep); color: var(--cream); padding-block: clamp(3rem, 7vw, 5rem); border-top: 1px solid rgba(255, 255, 255, 0.1); }
.footer-inner { display: grid; gap: 2.5rem; }
.footer-logo { width: 170px; height: auto; }
.footer-tag {
  margin-top: 1.1rem;
  font-family: var(--serif);
  font-style: italic;
  font-size: 1.05rem;
  color: rgba(242, 235, 218, 0.75);
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 1.5rem; font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase; }
.footer-nav a { color: rgba(242, 235, 218, 0.7); }
.footer-nav a:hover { color: #fff; }
.footer-legal { font-size: 0.82rem; color: rgba(242, 235, 218, 0.45); }

/* =============================================================
   15b. Botones sociales flotantes (persistentes)
   ============================================================= */
.social-float {
  position: fixed;
  right: clamp(0.9rem, 3.5vw, 1.75rem);
  bottom: clamp(0.9rem, 3.5vw, 1.75rem);
  z-index: 150;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
}
.social-btn {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  box-shadow: 0 8px 22px -8px rgba(20, 33, 61, 0.45);
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s var(--ease-out),
              background 0.3s var(--ease-out);
}
.social-btn svg { width: 20px; height: 20px; display: block; }
.social-btn:hover,
.social-btn:focus-visible {
  transform: translateY(-3px) scale(1.06);
  box-shadow: 0 16px 30px -8px rgba(20, 33, 61, 0.55);
}
.social-btn--wa {
  width: 54px;
  height: 54px;
  background: #25d366;
}
.social-btn--wa svg { width: 26px; height: 26px; }
.social-btn--ig:hover,
.social-btn--ig:focus-visible { background: #1d2f52; }
.social-btn--li:hover,
.social-btn--li:focus-visible { background: #1d2f52; }

/* =============================================================
   16. Splash
   ============================================================= */
.splash {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: grid;
  place-items: center;
  background: var(--bg);
  transition: opacity 0.6s var(--ease-out), visibility 0.6s;
  animation: splashSafety 0.01s 4.5s forwards;
}
.splash-mark {
  width: 60px; height: 60px;
  animation: splashPulse 1.5s var(--ease-soft) infinite;
}
.splash.is-out { opacity: 0; visibility: hidden; pointer-events: none; }
@keyframes splashPulse {
  0%, 100% { opacity: 0.35; transform: scale(0.94); }
  50% { opacity: 1; transform: scale(1); }
}
@keyframes splashSafety {
  to { opacity: 0; visibility: hidden; pointer-events: none; }
}
html:not(.js) .splash { display: none; }

/* =============================================================
   17. Responsive
   ============================================================= */
@media (min-width: 720px) {
  .stats { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
  .form { gap: 1.25rem; }
  .esencia-grid { grid-template-columns: 4rem 1fr; }
  .compara-grid { grid-template-columns: 1fr 1fr; }
  .compara-col--manual { border-bottom: 0; border-right: 1px solid var(--line); }
  .step {
    grid-template-columns: 1.15fr 0.85fr;
    gap: clamp(2rem, 5vw, 4rem);
  }
  .step:nth-child(even) .step-media { order: 2; }
}

@media (min-width: 900px) {
  .svc-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
  .contacto-grid { grid-template-columns: 0.9fr 1.1fr; align-items: start; }
}

@media (min-width: 1000px) {
  .nav-links { display: flex; }
  .nav-cta { display: inline-flex; margin-left: 0; }
  .nav-toggle { display: none; }
  .nav-menu { display: none !important; }
  .nav-inner { gap: 2.5rem; }

  .hero { min-height: 100svh; }
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    min-height: 100svh;
    gap: clamp(2rem, 5vw, 4rem);
  }
  .hero-inner { padding-top: 0; }
  .hero-visual { order: 0; min-height: 70vh; }
}

/* =============================================================
   18. Reduced motion — sólo efectos intrusivos
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  .hero-cue-line { animation: none; opacity: 0.5; transform: scaleY(1); }
  .splash-mark { animation: none; opacity: 1; }
}