/*
 * Estilos principales para ZAM.IA
 *
 * Esta hoja define un diseño limpio, moderno y accesible. Se emplean
 * variables CSS para colores y tipografías, y se aseguran los contrastes
 * mínimos AA. Las secciones se organizan mediante Flexbox y Grid para
 * permitir un comportamiento responsivo fluido.
 */

/* Variables de colores y fuentes */
:root {
  --color-primary: #5634af; /* tono violeta intenso para resaltar la innovación */
  --color-primary-dark: #3f2782;
  --color-secondary: #f5f5f7; /* fondo neutro claro */
  --color-text: #1f1f1f; /* texto principal */
  --color-muted: #555;
  --color-accent: #eec643; /* acento amarillo para llamadas de atención */
  --color-positive: #00a86b; /* verde para resultados positivos */
  --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Reset y configuración global */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-secondary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover, a:focus {
  text-decoration: underline;
}

/* Utilidades */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.section {
  padding: 4rem 0;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--color-primary-dark);
  text-align: center;
}

.section-intro {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 2rem;
  color: var(--color-muted);
}

/* Navegación */
.site-header {
  position: sticky;
  top: 0;
  background-color: #fff;
  border-bottom: 1px solid #eee;
  z-index: 1000;
}

.nav-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.75rem 1rem;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: 1rem;
}

.nav-menu li a {
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: 4px;
  color: var(--color-text);
}

.nav-menu li a:hover,
.nav-menu li a:focus {
  background-color: var(--color-primary);
  color: #fff;
}

/* Botón de navegación móvil */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle .hamburger {
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: all 0.3s ease;
}

.nav-toggle .hamburger::before,
.nav-toggle .hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform 0.3s ease;
}

.nav-toggle .hamburger::before {
  top: -6px;
}

.nav-toggle .hamburger::after {
  top: 6px;
}

/* Mostrar/ocultar menú en móvil */
@media (max-width: 768px) {
  .nav-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    width: 100%;
  }
  .nav-menu.open {
    max-height: 500px;
  }
  .nav-toggle {
    display: block;
  }
}

/* Hero */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 70vh;
  padding: 4rem 1rem;
  overflow: hidden;
  /* Fondo violeta oscuro para el héroe con contraste alto */
  background-color: var(--color-primary-dark);
  color: #fff;
}

/* Layout interno del hero: dos columnas que se adaptan */
.hero-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  width: 100%;
  max-width: 1200px;
  z-index: 1;
}

@media (min-width: 768px) {
  .hero-inner {
    flex-direction: row;
    align-items: center;
  }
  .hero-content,
  .hero-video {
    flex: 1;
  }
  .hero-content {
    padding-right: 2rem;
  }
}

/* Ajustes para la columna de video en el hero */
.hero-video {
  width: 100%;
}
.hero-video .video-item {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 ratio */
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}
.hero-video .video-item iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 8px;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0.5;
  z-index: -1;
}

.hero-content {
  text-align: center;
  max-width: 700px;
}

.hero h1 {
  font-size: 2.5rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero-subtitle {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: #eee;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Botones */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: 4px;
  font-weight: 600;
  transition: background-color 0.3s ease, color 0.3s ease;
  text-align: center;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--color-primary-dark);
  color: #fff;
}

.btn-secondary {
  background-color: #fff;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background-color: var(--color-primary);
  color: #fff;
}

.btn-whatsapp {
  background-color: #25d366;
  color: #fff;
}

.btn-whatsapp:hover,
.btn-whatsapp:focus {
  background-color: #1ebe5b;
  color: #fff;
}

/* Sección equipo */
.team-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  margin-top: 2rem;
}

.team-member {
  text-align: center;
}

.team-member img {
  width: 150px;
  height: 150px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 1rem;
}

.team-member h3 {
  font-size: 1.25rem;
  color: var(--color-primary-dark);
  margin-bottom: 0.5rem;
}

.team-member p {
  font-size: 0.95rem;
  color: var(--color-muted);
}

/* Sección servicios (qué hacemos) */
.services-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  margin-top: 2rem;
}

.service-item {
  background-color: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  transition: transform 0.3s ease;
}

.service-item:hover {
  transform: translateY(-5px);
}

.service-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary-dark);
}

.service-item p {
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* Diferenciales */
.section-differentials .diff-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  margin-top: 2rem;
}

.diff-item {
  background-color: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  transition: transform 0.3s ease;
}

.diff-item:hover {
  transform: translateY(-5px);
}

.diff-item h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary-dark);
}

.diff-item p {
  font-size: 0.95rem;
  color: var(--color-muted);
}

/* Sección casos / resultados */
.cases-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  margin-top: 2rem;
}

.case-item {
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
}

.case-item img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.case-item h3 {
  font-size: 1.1rem;
  margin: 0.75rem 1rem;
  color: var(--color-primary-dark);
}

.case-item p {
  font-size: 0.9rem;
  color: var(--color-text);
  margin: 0.25rem 1rem;
}

.case-item strong {
  color: var(--color-primary);
}

/* Sección flujo de servicios */
.section-flow .flow-diagram {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-top: 3rem;
}

.flow-step {
  position: relative;
  background-color: #fff;
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
  flex: 1;
}

.flow-step .circle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.flow-step h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: var(--color-primary-dark);
}

.flow-step p {
  font-size: 0.95rem;
  color: var(--color-muted);
}

.flow-step .brain {
  display: inline-block;
  margin-top: 0.5rem;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
}

.flow-step .brain.reptil { background-color: #ff936b; }
.flow-step .brain.limbico { background-color: #ffbf00; }
.flow-step .brain.cortex { background-color: #00a8e8; }

/* Flujo responsive horizontal en pantallas grandes */
@media (min-width: 768px) {
  .section-flow .flow-diagram {
    flex-direction: row;
  }
}

/* Animación de aparición para los pasos del flujo */
.flow-step {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.flow-step.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Sección contacto */
.contact-form {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.form-group input,
.form-group textarea {
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  outline: none;
  box-shadow: 0 0 0 2px rgba(86, 52, 175, 0.2);
}

.privacy-note {
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--color-muted);
  text-align: center;
}

.whatsapp-cta {
  margin-top: 1rem;
  text-align: center;
}

/* Footer */
.site-footer {
  background-color: var(--color-primary-dark);
  color: #fff;
  padding: 2rem 0;
  margin-top: auto;
}

/* Secciones legales */
.section-legal {
  background-color: #fdfbff;
  color: var(--color-text);
}

.site-footer p {
  margin-bottom: 0.5rem;
}

.footer-nav {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.footer-nav a {
  color: #fff;
  font-size: 0.9rem;
}

.footer-nav a:hover,
.footer-nav a:focus {
  text-decoration: underline;
}

/* Galería de videos */
.video-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  margin-top: 2rem;
}

.video-item {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* relación de aspecto 16:9 */
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.video-item iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* Accesibilidad: ocultar texto descriptivo pero accesible para lectores de pantalla */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}