/* ============================================
   HIUTEC — Estilos principales
   Paleta: Negro, Gris Carbón, Verde eléctrico (acento mínimo)
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-black:      #000000;
  --color-bg:         #0a0a0a;
  --color-bg-2:       #111111;
  --color-bg-3:       #161616;
  --color-border:     #222222;
  --color-border-2:   #2a2a2a;
  --color-gray-dark:  #333333;
  --color-gray:       #555555;
  --color-gray-mid:   #888888;
  --color-gray-light: #aaaaaa;
  --color-white:      #f0f0f0;
  --color-white-pure: #ffffff;
  --color-accent:     #00ff00;
  --color-accent-dim: rgba(0, 255, 0, 0.08);
  --color-accent-mid: rgba(0, 255, 0, 0.15);

  --font-primary: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --transition: 0.2s ease;
  --transition-slow: 0.4s ease;

  --max-width: 1200px;
  --section-padding: 120px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-white);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

/* --- Tipografía --- */
.section__tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 20px;
  padding: 6px 12px;
  border: 1px solid rgba(0, 255, 0, 0.2);
  border-radius: var(--radius-sm);
}

.section__title {
  font-family: var(--font-primary);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-white-pure);
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--color-gray-light);
  max-width: 560px;
  margin-bottom: 60px;
  line-height: 1.7;
}

.section__text {
  font-size: 1rem;
  color: var(--color-gray-light);
  line-height: 1.8;
  margin-bottom: 16px;
  max-width: 560px;
}

/* --- Botones --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid transparent;
}

.btn--primary {
  background: var(--color-white-pure);
  color: var(--color-black);
  border-color: var(--color-white-pure);
}

.btn--primary:hover {
  background: var(--color-gray-light);
  border-color: var(--color-gray-light);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-gray-light);
  border-color: var(--color-border-2);
}

.btn--ghost:hover {
  border-color: var(--color-gray);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* ============================================
   NAV
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
}

.nav__container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo img {
  height: 56px;
  width: auto;
  display: block;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-mid);
  transition: color var(--transition);
  letter-spacing: 0.01em;
}

.nav__links a:hover {
  color: var(--color-white);
}

.nav__cta {
  padding: 8px 20px;
  border: 1px solid var(--color-border-2);
  border-radius: var(--radius-md);
  color: var(--color-white) !important;
  transition: all var(--transition) !important;
}

.nav__cta:hover {
  border-color: var(--color-gray) !important;
  background: var(--color-bg-3);
}

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 68px;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

.hero__glow {
  position: absolute;
  top: 20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 255, 0, 0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero__container {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 40px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gray-mid);
  margin-bottom: 32px;
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: 100px;
  background: var(--color-bg-2);
}

.hero__badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  font-family: var(--font-primary);
  font-size: clamp(3rem, 7vw, 6rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--color-white-pure);
  margin-bottom: 28px;
  max-width: 800px;
}

.hero__title--accent {
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.4);
}

.hero__subtitle {
  font-size: 1.1rem;
  color: var(--color-gray-light);
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 48px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.hero__scroll span {
  display: block;
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--color-gray));
  margin: 0 auto;
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================
   STATS
   ============================================ */
.stats {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-2);
}

.stats__container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.stats__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 40px;
  text-align: center;
}

.stats__number {
  font-family: var(--font-primary);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-white-pure);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 8px;
}

.stats__label {
  font-size: 0.8rem;
  color: var(--color-gray-mid);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-weight: 500;
}

.stats__divider {
  width: 1px;
  height: 60px;
  background: var(--color-border);
  flex-shrink: 0;
}

/* ============================================
   VISIÓN
   ============================================ */
.vision {
  padding: var(--section-padding) 0;
  background: var(--color-bg);
}

.vision__container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.vision__visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 400px;
}

.vision__orb {
  position: relative;
  z-index: 2;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: var(--color-bg-3);
  border: 1px solid var(--color-border-2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.vision__orb img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  will-change: transform;
  transform-origin: center;
}

.vision__rings {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.vision__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--color-border);
}

.vision__ring--1 {
  width: 240px;
  height: 240px;
  animation: rotate 20s linear infinite;
  border-color: rgba(255,255,255,0.15);
}

.vision__ring--2 {
  width: 320px;
  height: 320px;
  animation: rotate 30s linear infinite reverse;
  border-color: rgba(255,255,255,0.10);
}

.vision__ring--3 {
  width: 400px;
  height: 400px;
  animation: rotate 40s linear infinite;
  border-color: rgba(0, 255, 0, 0.12);
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* ============================================
   PRODUCTOS
   ============================================ */
.products {
  padding: var(--section-padding) 0;
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
}

.products__container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

.products__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 60px;
}

.product-card {
  background: var(--color-bg-2);
  padding: 48px 40px;
  position: relative;
  transition: background var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  background: var(--color-bg-3);
}

.product-card--active {
  background: var(--color-bg-3);
}

.product-card--active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

.product-card__number {
  font-family: var(--font-primary);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--color-gray-dark);
  letter-spacing: 0.1em;
  margin-bottom: 24px;
}

.product-card__icon {
  color: var(--color-gray-mid);
  margin-bottom: 20px;
  transition: color var(--transition);
}

.product-card:hover .product-card__icon {
  color: var(--color-white);
}

.product-card__title {
  font-family: var(--font-primary);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-white-pure);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.product-card__text {
  font-size: 0.875rem;
  color: var(--color-gray-mid);
  line-height: 1.7;
  margin-bottom: 28px;
  flex: 1;
}

.product-card__status {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  background: var(--color-accent-dim);
  color: var(--color-accent);
  border: 1px solid rgba(0, 255, 0, 0.15);
}

.product-card__status--soon {
  background: rgba(255,255,255,0.04);
  color: var(--color-gray-mid);
  border-color: var(--color-border);
}

/* ============================================
   TECNOLOGÍA
   ============================================ */
.tech {
  padding: var(--section-padding) 0;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}

.tech__container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
}

.tech__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 60px;
}

.tech__item {
  background: var(--color-bg);
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: background var(--transition);
}

.tech__item:hover {
  background: var(--color-bg-3);
}

.tech__name {
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-white-pure);
  letter-spacing: -0.01em;
}

.tech__desc {
  font-size: 0.8rem;
  color: var(--color-gray-mid);
}

/* ============================================
   CONTACTO
   ============================================ */
.contact {
  padding: var(--section-padding) 0;
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
}

.contact__container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  max-width: 700px;
}

.contact__links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 40px;
}

.contact__icon-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  border: 1px solid var(--color-border-2);
  color: var(--color-gray-mid);
  background: var(--color-bg-3);
  transition: all var(--transition);
}

.contact__icon-link:hover {
  color: var(--color-white);
  border-color: var(--color-gray);
  background: var(--color-bg-2);
  transform: translateY(-2px);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-black);
}

.footer__container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer__logo img {
  height: 24px;
  width: auto;
  opacity: 0.7;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--color-gray);
  line-height: 1.6;
  text-align: center;
}

.footer__copy span {
  color: var(--color-gray-dark);
}

.footer__tagline {
  font-size: 0.75rem;
  color: var(--color-gray-dark);
  font-style: italic;
  letter-spacing: 0.05em;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  .vision__container {
    grid-template-columns: 1fr;
    gap: 60px;
  }

  .vision__visual {
    height: 300px;
  }

  .products__grid,
  .tech__grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px;
  }

  .nav__container {
    padding: 0 20px;
  }

  .nav__links {
    display: none;
  }

  .hero__container {
    padding: 60px 20px;
  }

  .hero__title {
    font-size: clamp(2.5rem, 10vw, 4rem);
  }

  .stats__container {
    flex-direction: column;
    padding: 0;
  }

  .stats__divider {
    width: 60px;
    height: 1px;
  }

  .stats__item {
    padding: 32px 20px;
  }

  .vision__container,
  .products__container,
  .tech__container,
  .contact__container {
    padding: 0 20px;
  }

  .footer__container {
    flex-direction: column;
    text-align: center;
    padding: 0 20px;
  }
}

/* ============================================
   ACCESIBILIDAD
   ============================================ */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}