/* ===================================
   1. VARIABLES Y RESET
=================================== */
:root {
  --color-neon: #00f0ff;
  --color-neon-dark: #00d4e6;
  --color-black: #000000;
  --color-dark: #0a0a0a;
  --color-darker: #1a1a1a;
  --color-light: #f8f9fa;
  --color-white: #ffffff;
  --color-gray: #9ca3af; /* D2: Gris más claro para mejor legibilidad */
  --transition: all 0.3s ease;
  --shadow-neon: 0 0 20px rgba(0, 240, 255, 0.5);
  --shadow-neon-strong: 0 0 30px rgba(0, 240, 255, 0.8);
}

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

html {
  scroll-behavior: smooth;
}

/* D3: Patrón de fondo tech sutil */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--color-black);
  color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 1px 1px, rgba(0, 240, 255, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: 0 0, 20px 20px;
}

/* ===================================
   2. UTILIDADES
=================================== */
.text-neon {
  color: var(--color-neon);
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.7);
}

.section-light {
  background-color: var(--color-darker);
  color: var(--color-white);
}

.section-dark {
  background-color: var(--color-dark);
  color: var(--color-white);
}

.section-darker {
  background-color: var(--color-black);
  color: var(--color-white);
}

/* Espaciado vertical optimizado */
section {
  padding: 4rem 0;
  scroll-margin-top: 80px;
  border-bottom: 1px solid rgba(0, 240, 255, 0.15); /* Línea separadora sutil */
}

/* Última sección sin borde inferior */
section:last-of-type {
  border-bottom: none;
}

@media (max-width: 991px) {
  section {
    padding: 3.5rem 0;
  }
}

@media (max-width: 767px) {
  section {
    padding: 3rem 0;
  }
}

/* ===================================
   3. NAVBAR STICKY
=================================== */
.navbar {
  background: rgba(0, 0, 0, 0.95);
  transition: var(--transition);
  padding: 1rem 0;
  z-index: 1000;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 240, 255, 0.2);
  border-bottom: 1px solid rgba(0, 240, 255, 0.3);
}

.navbar.scrolled {
  background: rgba(0, 0, 0, 0.95) !important;
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 240, 255, 0.2);
  border-bottom: 1px solid rgba(0, 240, 255, 0.3);
  padding: 1rem 0;
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white) !important;
  transition: var(--transition);
  text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.navbar-brand:hover {
  color: var(--color-neon) !important;
  text-shadow: var(--shadow-neon);
}

.navbar-brand i {
  color: var(--color-neon);
  margin-right: 0.5rem;
  text-shadow: var(--shadow-neon);
}

.navbar-brand .brand-text {
  color: var(--color-white);
  font-weight: 700;
}

.nav-link {
  color: var(--color-white) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--color-neon);
  transition: var(--transition);
  box-shadow: var(--shadow-neon);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-neon) !important;
}

/* Responsive Navbar */
@media (max-width: 991px) {
  .navbar-collapse {
    background: rgba(0, 0, 0, 0.98);
    padding: 1rem;
    border-radius: 10px;
    margin-top: 1rem;
    border: 1px solid rgba(0, 240, 255, 0.3);
  }
  
  .nav-link {
    padding: 1rem !important;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  
  .nav-link:last-child {
    border-bottom: none;
  }
  
  .navbar-brand {
    font-size: 1.1rem;
    color: var(--color-neon) !important;
    text-shadow: var(--shadow-neon-strong);
  }
  
  .navbar-brand .brand-text {
    color: var(--color-neon) !important;
    font-size: 1rem;
  }
  
  .navbar-toggler {
    border-color: var(--color-neon);
    padding: 0.5rem;
  }
  
  .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2300f0ff' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
  }
  
  .navbar > .container {
    padding-left: 0.5rem;
    padding-right: 0.5rem;
  }
}

.btn-outline-neon {
  border: 2px solid var(--color-neon);
  color: var(--color-neon);
  background: transparent;
  padding: 0.5rem 1rem;
  transition: var(--transition);
  font-weight: 600;
}

.btn-outline-neon:hover {
  background: var(--color-neon);
  color: var(--color-black);
  box-shadow: var(--shadow-neon-strong);
  transform: translateY(-2px);
}

.btn-whatsapp {
  background: var(--color-neon);
  color: var(--color-black);
  border: 2px solid var(--color-neon);
  padding: 0.5rem 1.5rem;
  font-weight: 600;
  transition: var(--transition);
}

.btn-whatsapp:hover {
  background: transparent;
  color: var(--color-neon);
  box-shadow: var(--shadow-neon-strong);
  transform: translateY(-2px);
}

/* ===================================
   4. HERO SECTION
=================================== */
.hero {
  position: relative;
  min-height: 100vh;
  background: linear-gradient(135deg, var(--color-black) 0%, var(--color-darker) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 240, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 240, 255, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(0, 0, 0, 0.8) 0%,
    rgba(10, 10, 10, 0.7) 50%,
    rgba(0, 0, 0, 0.9) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--color-white);
  text-shadow: 
    2px 2px 4px rgba(0, 0, 0, 0.8),
    0 0 20px rgba(0, 240, 255, 0.3);
}

.hero-subtitle {
  font-size: 1.2rem;
  font-weight: 400;
  line-height: 1.8;
  color: var(--color-gray); /* D2: Mejor contraste */
  max-width: 900px;
  margin: 0 auto;
  text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.9);
}

.hero-cta {
  margin-top: 1.5rem;
}

.hero-cta .btn {
  margin: 0.5rem;
}

/* Métricas Hero */
.hero-metrics {
  margin-top: 3rem;
  padding-top: 3rem;
  border-top: 1px solid rgba(0, 240, 255, 0.3);
}

.metric-card {
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  border: 1px solid rgba(0, 240, 255, 0.3);
  transition: var(--transition);
}

.metric-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-neon);
  background: rgba(0, 240, 255, 0.1);
}

.metric-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-neon);
  margin: 0;
  text-shadow: var(--shadow-neon);
}

.metric-label {
  font-size: 0.9rem;
  color: var(--color-gray); /* D2: Mejor contraste */
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Scroll Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
}

.scroll-indicator a {
  color: var(--color-neon);
  font-size: 2rem;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

/* ===================================
   5. SECCIONES GENERALES
=================================== */
.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-gray); /* D2: Mejor legibilidad */
  margin-bottom: 1.5rem;
}

.section-light .section-title {
  color: var(--color-white);
}

.section-dark .section-title {
  color: var(--color-white);
}

.section-darker .section-title {
  color: var(--color-white);
}

/* ===================================
   6. SERVICIOS
=================================== */
.service-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 15px;
  padding: 2rem;
  height: 100%;
  transition: var(--transition);
  border: 2px solid rgba(0, 240, 255, 0.2);
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-neon);
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--color-neon);
}

.service-icon {
  width: 80px;
  height: 80px;
  background: var(--color-neon);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-neon);
}

.service-icon i {
  font-size: 2rem;
  color: var(--color-black);
}

.service-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.service-description {
  color: var(--color-gray); /* D2: Mejor legibilidad */
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.service-features {
  list-style: none;
  padding: 0;
}

.service-features li {
  padding: 0.5rem 0;
  color: var(--color-gray); /* D2: Mejor legibilidad */
  position: relative;
  padding-left: 1.5rem;
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-neon);
  font-weight: bold;
}

/* Servicio destacado (Automatización) */
.service-card-featured {
  background: rgba(0, 240, 255, 0.08);
  border: 3px solid var(--color-neon);
  box-shadow: var(--shadow-neon);
}

.service-card-featured .service-title {
  color: var(--color-neon);
  font-size: 1.8rem;
}

/* ===================================
   7. PORTAFOLIO / PROYECTOS
=================================== */
.project-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 15px;
  overflow: hidden;
  transition: var(--transition);
  border: 2px solid rgba(0, 240, 255, 0.2);
  height: 100%;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-neon);
  border-color: var(--color-neon);
}

.project-image {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2), rgba(0, 240, 255, 0.05));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-neon);
}

.project-content {
  padding: 1.5rem;
}

.project-role {
  display: inline-block;
  background: var(--color-neon);
  color: var(--color-black);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.project-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.project-description {
  color: var(--color-gray); /* D2: Mejor legibilidad */
  line-height: 1.6;
  font-size: 0.95rem;
}

/* ===================================
   8. STACK TECNOLÓGICO
=================================== */
.tech-category-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-neon);
  margin-bottom: 1rem;
  text-align: center;
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 1rem;
}

.tech-item {
  text-align: center;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  border: 1px solid rgba(0, 240, 255, 0.2);
  transition: var(--transition);
}

.tech-item:hover {
  transform: translateY(-5px);
  border-color: var(--color-neon);
  box-shadow: 0 5px 15px rgba(0, 240, 255, 0.3);
  background: rgba(0, 240, 255, 0.1);
}

.tech-item i {
  font-size: 2.5rem;
  color: var(--color-neon);
  margin-bottom: 0.5rem;
}

.tech-item span {
  display: block;
  color: var(--color-gray); /* D2: Mejor legibilidad */
  font-size: 0.9rem;
  font-weight: 600;
}

/* ===================================
   9. CTA FINAL / CONTACTO
=================================== */
.cta-final {
  padding: 4rem 0; /* Reducido de 7rem */
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}

.cta-description {
  font-size: 1.2rem;
  color: var(--color-gray); /* D2: Mejor legibilidad */
  line-height: 1.8;
}

.contact-info-card {
  text-align: center;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 12px;
  border: 2px solid rgba(0, 240, 255, 0.2);
  transition: var(--transition);
  height: 100%;
}

.contact-info-card:hover {
  transform: translateY(-5px);
  border-color: var(--color-neon);
  box-shadow: 0 5px 20px rgba(0, 240, 255, 0.3);
  background: rgba(0, 240, 255, 0.1);
}

.contact-info-card i {
  font-size: 2.5rem;
  color: var(--color-neon);
  margin-bottom: 1rem;
}

.contact-info-card h4 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.contact-info-card p {
  color: var(--color-gray); /* D2: Mejor legibilidad */
  margin: 0;
}

.contact-info-card a {
  color: var(--color-neon);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.contact-info-card a:hover {
  color: var(--color-neon-dark);
  text-decoration: underline;
}

/* Formulario de Contacto */
.contact-form {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 15px;
  padding: 2.5rem;
  border: 2px solid rgba(0, 240, 255, 0.2);
}

.form-label {
  color: var(--color-white);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.form-control,
.form-select {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.3);
  color: var(--color-white);
  padding: 0.75rem;
  transition: var(--transition);
}

.form-control:focus,
.form-select:focus {
  background: rgba(255, 255, 255, 0.15);
  border-color: var(--color-neon);
  box-shadow: 0 0 0 0.2rem rgba(0, 240, 255, 0.25);
  color: var(--color-white);
}

.form-control::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

/* ===================================
   10. FOOTER
=================================== */
.footer {
  background: var(--color-black);
  border-top: 2px solid rgba(0, 240, 255, 0.3);
  padding: 3rem 0 1rem;
}

.footer-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-neon);
  margin-bottom: 1rem;
  text-shadow: var(--shadow-neon);
}

.footer-description {
  color: var(--color-gray); /* D2: Mejor legibilidad */
  line-height: 1.8;
  margin-bottom: 1rem;
}

.social-links {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  background: rgba(0, 240, 255, 0.1);
  border: 2px solid var(--color-neon);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-neon);
  transition: var(--transition);
  text-decoration: none;
}

.social-link:hover {
  background: var(--color-neon);
  color: var(--color-black);
  box-shadow: var(--shadow-neon-strong);
  transform: translateY(-3px);
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: var(--color-gray); /* D2: Mejor legibilidad */
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--color-neon);
  padding-left: 5px;
}

.footer-contact {
  list-style: none;
  padding: 0;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  margin-bottom: 1rem;
  color: var(--color-gray); /* D2: Mejor legibilidad */
}

.footer-contact i {
  color: var(--color-neon);
  margin-right: 1rem;
  margin-top: 0.2rem;
  font-size: 1.2rem;
}

.footer-contact a {
  color: var(--color-neon);
  text-decoration: none;
  transition: var(--transition);
}

.footer-contact a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

.footer-legal-link {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.9rem;
}

.footer-legal-link:hover {
  color: var(--color-neon);
}

/* ===================================
   11. RESPONSIVE DESIGN
=================================== */

/* Tablets (768px - 991px) */
@media (max-width: 991px) {
  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .metric-number {
    font-size: 2rem;
  }

  .service-card,
  .project-card {
    margin-bottom: 1.5rem;
  }
}

/* Móviles (menos de 768px) */
@media (max-width: 767px) {
  .hero {
    min-height: 80vh;
    padding-top: 100px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .hero-cta .btn {
    display: block;
    width: 100%;
    margin: 0.5rem 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .section-subtitle {
    font-size: 1rem;
  }

  .metric-number {
    font-size: 1.8rem;
  }

  .metric-label {
    font-size: 0.8rem;
  }

  .service-icon {
    width: 60px;
    height: 60px;
  }

  .service-icon i {
    font-size: 1.5rem;
  }

  .service-title {
    font-size: 1.3rem;
  }

  .tech-category-title {
    font-size: 1.5rem;
  }

  .cta-title {
    font-size: 1.8rem;
  }

  .cta-description {
    font-size: 1rem;
  }

  .navbar-brand {
    font-size: 1.2rem;
  }

  .scroll-indicator {
    bottom: 20px;
  }

  .footer-title {
    font-size: 1.1rem;
  }
}

/* Móviles pequeños (menos de 576px) */
@media (max-width: 575px) {
  .navbar-brand {
    font-size: 1rem;
  }
  
  .navbar-brand .brand-text {
    font-size: 0.9rem;
  }
  
  .navbar-brand i {
    font-size: 1rem;
  }
  
  .hero-title {
    font-size: 1.6rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .metric-card {
    padding: 1rem;
  }

  .metric-number {
    font-size: 1.5rem;
  }

  .service-card,
  .project-card,
  .tech-item,
  .contact-info-card,
  .contact-form {
    padding: 1.5rem;
  }

  .btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
  }
}

/* ===================================
   12. ANIMACIONES Y EFECTOS
=================================== */
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Loading states */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Focus states para accesibilidad */
a:focus,
button:focus,
input:focus,
textarea:focus,
select:focus {
  outline: 2px solid var(--color-neon);
  outline-offset: 2px;
}

/* Print styles */
@media print {
  .navbar,
  .footer,
  .btn,
  .scroll-indicator {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
}