/* =========================================
   VARIABLES Y RESET GLOBAL
   ========================================= */

:root {
  --color-primario:      #1B6DB5;
  --color-primario-dark: #145596;
  --color-acento:        #00C2FF;
  --color-fondo:         #FFFFFF;
  --color-fondo-alt:     #F4F6FA;
  --color-texto:         #2D2D2D;
  --color-texto-suave:   #555555;
  --color-borde:         #E2E8F0;
  --color-error:         #E84040;
  --color-exito:         #22C55E;

  --fuente-base: 'Inter', system-ui, sans-serif;

  --peso-regular: 400;
  --peso-medio:   500;
  --peso-semi:    600;
  --peso-bold:    700;

  --tam-xs:  0.75rem;
  --tam-sm:  0.875rem;
  --tam-base:1rem;
  --tam-md:  1.125rem;
  --tam-lg:  1.25rem;
  --tam-xl:  1.5rem;
  --tam-2xl: 2rem;
  --tam-3xl: 2.5rem;
  --tam-4xl: 3.25rem;

  --radio:    8px;
  --radio-lg: 16px;
  --sombra-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --sombra:    0 4px 16px rgba(0,0,0,.10);
  --sombra-lg: 0 10px 32px rgba(0,0,0,.14);

  --transition: 0.2s ease;

  --ancho-max: 1200px;
  --padding-x: clamp(1rem, 4vw, 2rem);
  --alto-nav:  172px;
}

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

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

body {
  font-family: var(--fuente-base);
  font-size: var(--tam-base);
  font-weight: var(--peso-regular);
  color: var(--color-texto);
  background-color: var(--color-fondo);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* =========================================
   TIPOGRAFÍA BASE
   ========================================= */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--peso-bold);
  line-height: 1.2;
  color: var(--color-texto);
}

p {
  color: var(--color-texto-suave);
  line-height: 1.7;
}

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

a:hover { color: var(--color-primario-dark); }

ul { list-style: none; }

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

/* =========================================
   LAYOUT
   ========================================= */

.container {
  max-width: var(--ancho-max);
  margin-inline: auto;
  padding-inline: var(--padding-x);
}

.seccion {
  padding-block: clamp(3rem, 8vw, 6rem);
}

.seccion--alt {
  background-color: var(--color-fondo-alt);
}

.seccion__cabecera {
  text-align: center;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.seccion__titulo {
  font-size: var(--tam-3xl);
  margin-bottom: 0.75rem;
}

.seccion__subtitulo {
  font-size: var(--tam-md);
  max-width: 56ch;
  margin-inline: auto;
}

/* =========================================
   ANIMACIONES
   ========================================= */

/* =========================================
   KEYFRAMES
   ========================================= */

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

@keyframes entradaIzquierda {
  from { opacity: 0; transform: translateX(-50px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes entradaDerecha {
  from { opacity: 0; transform: translateX(50px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes flotar {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}

@keyframes flotarLento {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50%       { transform: translateY(-8px) rotate(3deg); }
}

@keyframes pulso {
  0%, 100% { box-shadow: 0 0 0 0 rgba(27, 109, 181, 0.4); }
  50%       { box-shadow: 0 0 0 10px rgba(27, 109, 181, 0); }
}

@keyframes degradadoMovil {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes brillo {
  0%   { left: -100%; }
  100% { left: 200%; }
}

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

@keyframes escala {
  from { opacity: 0; transform: scale(0.85) translateY(20px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* Líneas del grafo — flujo de datos */
@keyframes flujoLinea {
  from { stroke-dashoffset: 22; }
  to   { stroke-dashoffset: 0; }
}

@keyframes flujoLineaInv {
  from { stroke-dashoffset: 0; }
  to   { stroke-dashoffset: 22; }
}

/* Ciclo de color azul → celeste → violeta */
@keyframes colorLinea {
  0%   { stroke: #1B6DB5; opacity: 0.5; }
  35%  { stroke: #00C2FF; opacity: 0.9; }
  65%  { stroke: #8B5CF6; opacity: 0.7; }
  100% { stroke: #1B6DB5; opacity: 0.5; }
}

@keyframes colorNodo {
  0%   { stroke: #1B6DB5; r: 4; }
  35%  { stroke: #00C2FF; r: 5; }
  65%  { stroke: #8B5CF6; r: 4.5; }
  100% { stroke: #1B6DB5; r: 4; }
}

/* Tags flotando individualmente (sin entrada — ya aparecen con el hero) */
@keyframes entradaFlota {
  0%   { transform: translateY(0px)   translateX(0px); }
  20%  { transform: translateY(-27px) translateX(12px); }
  45%  { transform: translateY(-42px) translateX(-9px); }
  70%  { transform: translateY(-21px) translateX(15px); }
  100% { transform: translateY(0px)   translateX(0px); }
}

@keyframes flotarPCB {
  0%   { transform: perspective(900px) rotateX(6deg)  rotateY(-14deg) rotateZ(1deg)  translateY(0px); }
  25%  { transform: perspective(900px) rotateX(10deg) rotateY(6deg)   rotateZ(-1deg) translateY(-14px); }
  50%  { transform: perspective(900px) rotateX(3deg)  rotateY(12deg)  rotateZ(2deg)  translateY(-20px); }
  75%  { transform: perspective(900px) rotateX(9deg)  rotateY(-4deg)  rotateZ(-1deg) translateY(-10px); }
  100% { transform: perspective(900px) rotateX(6deg)  rotateY(-14deg) rotateZ(1deg)  translateY(0px); }
}

/* =========================================
   ANIMACIONES DE SCROLL
   ========================================= */

.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.fade-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.fade-right {
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.escala-entrada {
  opacity: 0;
  transform: scale(0.88) translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.fade-up.visible,
.fade-left.visible,
.fade-right.visible,
.escala-entrada.visible {
  opacity: 1;
  transform: none;
}

/* Stagger para listas de cards */
.fade-up:nth-child(1) { transition-delay: 0s; }
.fade-up:nth-child(2) { transition-delay: 0.12s; }
.fade-up:nth-child(3) { transition-delay: 0.24s; }
.fade-up:nth-child(4) { transition-delay: 0.36s; }
.fade-up:nth-child(5) { transition-delay: 0.48s; }

/* =========================================
   ANIMACIONES DEL HERO (carga inicial)
   ========================================= */

.hero__badge     { animation: heroEntrada 0.5s ease 0.15s both; }
.hero__titulo    { animation: heroEntrada 0.65s ease 0.3s both; }
.hero__subtitulo { animation: heroEntrada 0.65s ease 0.45s both; }
.hero__ctas      { animation: heroEntrada 0.65s ease 0.6s both; }

/* Animación de tags gestionada en components.css (.hero__nodos .hero__tag) */

/* =========================================
   REDUCCIÓN DE MOVIMIENTO (accesibilidad)
   ========================================= */

@media (prefers-reduced-motion: reduce) {
  .fade-up, .fade-left, .fade-right, .escala-entrada,
  .hero__badge, .hero__titulo, .hero__subtitulo, .hero__ctas, .hero__tag {
    animation: none;
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* =========================================
   BOTONES
   ========================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radio);
  font-family: var(--fuente-base);
  font-size: var(--tam-base);
  font-weight: var(--peso-semi);
  cursor: pointer;
  border: 2px solid transparent;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition),
              box-shadow var(--transition);
  white-space: nowrap;
  text-decoration: none;
  min-height: 44px;
}

.btn:active { transform: translateY(1px); }

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

.btn--primario:hover {
  background-color: var(--color-primario-dark);
  border-color: var(--color-primario-dark);
  color: #fff;
  box-shadow: var(--sombra);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primario);
  border-color: var(--color-primario);
}

.btn--outline:hover {
  background-color: var(--color-primario);
  color: #fff;
}

.btn--outline-blanco {
  background-color: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.7);
}

.btn--outline-blanco:hover {
  background-color: rgba(255,255,255,0.15);
  border-color: #fff;
  color: #fff;
}

.btn--nav {
  padding: 0.5rem 1.25rem;
  font-size: var(--tam-sm);
}

.btn--grande {
  padding: 1rem 2.5rem;
  font-size: var(--tam-md);
}