/* =========================================================
   CU Group — Landing corporativa
   Identidad: unificada con la paleta real de CheckUp (2026-08-04) —
   navy #0B1230 + teal #00A8C8/#00E5F0, la misma que usan la app y el
   Mantenedor, reemplazando la paleta Cobalto/Coral/Lima v1 de Kai que
   nunca se alineó con el resto de los productos de CU Group.
   ========================================================= */

:root {
  --color-bg: #0B1230;        /* Navy — fondo base, igual que CheckUp */
  --color-bg-dim: #0F1A3A;    /* Navy card/superficie */
  --color-primary: #00A8C8;   /* Teal — acento principal */
  --color-accent: #00E5F0;    /* Teal brillante — highlight/hover */
  --color-text: #E2E8F0;      /* Texto principal sobre fondo oscuro */
  --color-text-dim: rgba(226, 232, 240, 0.7);
  --color-border: rgba(226, 232, 240, 0.12);

  --font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;

  --container-max: 1200px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4.5rem;
  --space-7: 6rem;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;

  --transition-base: 200ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1, h2, h3, p {
  margin: 0;
}

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

/* ---------- Utilidades ---------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: var(--color-bg);
  padding: var(--space-2) var(--space-3);
  z-index: 1000;
  border-radius: var(--radius-sm);
}

.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

.eyebrow {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-2);
}

.eyebrow--center {
  text-align: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: transform var(--transition-base), background var(--transition-base),
    box-shadow var(--transition-base);
  border: 2px solid transparent;
  cursor: pointer;
}

.btn--primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  color: var(--color-bg);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 229, 240, 0.3);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(226, 232, 240, 0.06);
  border-color: var(--color-primary);
  color: var(--color-accent);
}

.btn--small {
  padding: 0.6rem 1.3rem;
  font-size: 0.85rem;
}

.btn--large {
  padding: 1.05rem 2.2rem;
  font-size: 1.05rem;
}

/* Foco visible accesible en toda la página */
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Animación de entrada progresiva (mejora, no requisito funcional) */
.reveal {
  opacity: 1;
  transform: none;
}

.js-reveal-ready .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 600ms ease, transform 600ms ease;
}

.js-reveal-ready .reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* =========================================================
   FRANJA "EN CONSTRUCCIÓN"
   ========================================================= */
.construction-banner {
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 9px 16px;
  background: linear-gradient(90deg, #0B1230 0%, #0F1A3A 50%, #0B1230 100%);
  border-bottom: 1px solid rgba(0, 229, 240, 0.35);
  box-shadow: 0 1px 12px rgba(0, 229, 240, 0.15);
  font-size: 13px;
  line-height: 1.3;
  color: var(--color-text);
  text-align: center;
}

.construction-banner__dot {
  flex-shrink: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  box-shadow: 0 0 6px rgba(0, 229, 240, 0.8);
  animation: construction-pulse 2s ease-in-out infinite;
}

.construction-banner strong {
  color: var(--color-accent);
  font-weight: 700;
}

@keyframes construction-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.55; transform: scale(0.8); }
}

@media (prefers-reduced-motion: reduce) {
  .construction-banner__dot {
    animation: none;
  }
}

@media (max-width: 480px) {
  .construction-banner {
    padding: 8px 12px;
    font-size: 11.5px;
  }
}

/* =========================================================
   HEADER / NAV
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 18, 48, 0.85);
  backdrop-filter: blur(8px);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-2);
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-text);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  z-index: 110;
}

.brand__mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  z-index: 110;
}

.nav-toggle__bar {
  width: 24px;
  height: 2.5px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

.primary-nav {
  position: fixed;
  inset: 0 0 0 30%;
  background: var(--color-bg-dim);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  transform: translateX(100%);
  transition: transform var(--transition-base);
  padding: var(--space-4);
}

.primary-nav.is-open {
  transform: translateX(0);
}

.primary-nav__list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  font-size: 1.25rem;
  font-weight: 600;
}

.primary-nav__list a {
  transition: color var(--transition-base);
}

.primary-nav__list a:hover,
.primary-nav__list a:focus-visible {
  color: var(--color-accent);
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }

  .primary-nav {
    position: static;
    inset: auto;
    background: transparent;
    flex-direction: row;
    transform: none;
    padding: 0;
    gap: var(--space-4);
  }

  .primary-nav__list {
    flex-direction: row;
    font-size: 0.95rem;
  }
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  background:
    radial-gradient(60% 55% at 88% 8%, rgba(0, 229, 240, 0.14) 0%, rgba(0, 229, 240, 0) 60%),
    radial-gradient(50% 60% at 8% 92%, rgba(0, 168, 200, 0.12) 0%, rgba(0, 168, 200, 0) 60%),
    var(--color-bg);
  color: var(--color-text);
  overflow: hidden;
}

.hero__inner {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: var(--space-5);
  padding-block: var(--space-6) var(--space-6);
}

.hero__copy {
  text-align: center;
  max-width: 640px;
}

.hero__title {
  font-size: clamp(2rem, 5vw + 1rem, 3.4rem);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-3);
}

.hero__subtitle {
  font-size: 1.05rem;
  color: var(--color-text-dim);
  margin-bottom: var(--space-4);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: center;
}

.hero__actions .btn--ghost {
  color: var(--color-text);
  border-color: var(--color-border);
}

.hero__actions .btn--ghost:hover,
.hero__actions .btn--ghost:focus-visible {
  background: rgba(226, 232, 240, 0.06);
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.hero__visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.hero__visual::before {
  content: "";
  position: absolute;
  width: min(70vw, 320px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(0, 229, 240, 0.22) 0%,
    rgba(0, 229, 240, 0) 70%
  );
  z-index: 0;
}

.hero__logo-big {
  position: relative;
  z-index: 1;
  width: min(58vw, 240px);
  height: auto;
  border-radius: var(--radius-lg);
  filter: drop-shadow(0 18px 40px rgba(0, 0, 0, 0.45));
  animation: pulse-glow 3.2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% {
    transform: scale(1);
    filter: drop-shadow(0 0 0 rgba(0, 229, 240, 0));
  }
  50% {
    transform: scale(1.035);
    filter: drop-shadow(0 0 18px rgba(0, 229, 240, 0.4));
  }
}

@media (min-width: 900px) {
  .hero__inner {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
    padding-block: var(--space-7);
  }

  .hero__copy {
    text-align: left;
  }

  .hero__actions {
    justify-content: flex-start;
  }

  .hero__logo-big {
    width: 280px;
  }
}

/* =========================================================
   SECCIONES GENERALES
   ========================================================= */
.section {
  padding-block: var(--space-6);
}

.section--alt {
  background: var(--color-bg-dim);
}

.section__title {
  font-size: clamp(1.6rem, 3vw + 1rem, 2.4rem);
  font-weight: 800;
  color: var(--color-text);
  text-align: center;
  max-width: 760px;
  margin-inline: auto;
  margin-bottom: var(--space-3);
}

.section__intro {
  text-align: center;
  max-width: 620px;
  margin-inline: auto;
  margin-bottom: var(--space-5);
  color: var(--color-text-dim);
  font-size: 1.05rem;
}

/* ---------- Cards de servicios ---------- */
.cards {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .cards {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* La sección "Qué hacemos" tiene 3 cards desde el reposicionamiento de
   negocio (2026-08-01) — usa 3 columnas en vez de las 4 genéricas para
   evitar un hueco vacío en desktop. .cards--portfolio sigue en 4 columnas
   porque el portafolio mantiene sus 4 proyectos reales. */
@media (min-width: 1100px) {
  .cards:not(.cards--portfolio) {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--color-bg-dim);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.3);
  border-color: rgba(0, 229, 240, 0.3);
}

.card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-3);
}

.card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  letter-spacing: -0.01em;
}

.card p {
  color: var(--color-text-dim);
  font-size: 0.92rem;
}

/* ---------- Portafolio ---------- */
.cards--portfolio {
  align-items: stretch;
}

.portfolio-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-dim);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.portfolio-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.3);
  border-color: rgba(0, 229, 240, 0.3);
}

.portfolio-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
  letter-spacing: -0.01em;
}

.portfolio-card p {
  color: var(--color-text-dim);
  font-size: 0.92rem;
  margin-bottom: var(--space-3);
  flex-grow: 1;
}

.portfolio-card .btn,
.portfolio-card .badge {
  align-self: flex-start;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
}

.badge--soon {
  background: rgba(0, 168, 200, 0.12);
  color: var(--color-text-dim);
}

/* ---------- Clientes ---------- */
.client-wall {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
}

.client-wall__item {
  background: var(--color-bg-dim);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 96px;
  width: 220px;
}

.client-wall__item img {
  max-height: 48px;
  max-width: 160px;
  width: auto;
  height: auto;
}

/* ---------- CTA / Contacto ---------- */
.section--cta {
  background: linear-gradient(135deg, #0B1230 0%, #071022 100%);
  color: var(--color-text);
}

.section--cta__inner {
  text-align: center;
  max-width: 640px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.section--cta__inner .btn {
  margin-top: var(--space-2);
}

.section__title--light {
  color: var(--color-text);
}

.section__intro--light {
  color: var(--color-text-dim);
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  background: var(--color-bg-dim);
  color: var(--color-text-dim);
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-5);
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  text-align: center;
}

.brand--footer {
  margin-bottom: var(--space-1);
}

.site-footer__tagline {
  font-size: 0.9rem;
}

.site-footer__copy {
  font-size: 0.8rem;
  color: rgba(226, 232, 240, 0.5);
}

.site-footer__copy a {
  color: rgba(226, 232, 240, 0.75);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-base);
}

.site-footer__copy a:hover,
.site-footer__copy a:focus-visible {
  color: var(--color-accent);
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--color-bg-dim);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 4px var(--space-3);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--color-text);
  padding: var(--space-2) 0;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  float: right;
  font-weight: 400;
  color: var(--color-accent);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  margin: 0 0 var(--space-2);
  color: var(--color-text-dim);
  font-size: 0.92rem;
  line-height: 1.6;
}