:root {
  --verde-hoja: #2E7D32;
  --verde-oscuro: #1B5E20;
  --verde-claro: #66BB6A;
  --uva: #5E35B1;
  --uva-oscuro: #4527A0;
  --arena: #E8DCC8;
  --tierra: #8D6E63;
  --crema: #FAF7F0;
}

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

body {
  font-family: 'Inter', system-ui, 'Segoe UI', sans-serif;
}

img,
svg {
  max-width: 100%;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 0.75rem 0;
  background: var(--verde-oscuro);
  color: #fff;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  left: 0;
}

:focus-visible {
  outline: 3px solid var(--uva);
  outline-offset: 3px;
  border-radius: 0.4rem;
}

.site-header {
  background: rgba(250, 247, 240, 0);
}

.site-header.encogido {
  background: rgba(250, 247, 240, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 10px 30px -18px rgba(27, 94, 32, 0.45);
}

.nav-link {
  position: relative;
  padding: 0.35rem 0;
  color: #334155;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--verde-hoja), var(--uva));
  border-radius: 2px;
  transition: width 0.25s ease;
}

.nav-link:hover {
  color: var(--verde-oscuro);
}

.nav-link:hover::after {
  width: 100%;
}

.menu-movil-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 0.85rem;
  border-radius: 0.75rem;
  color: #334155;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.menu-movil-link:hover {
  background: rgba(46, 125, 50, 0.08);
  color: var(--verde-oscuro);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border-radius: 999px;
  padding: 0.7rem 1.4rem;
  font-weight: 600;
  color: #fff;
  text-decoration: none;
  background: linear-gradient(120deg, var(--verde-hoja), var(--verde-oscuro));
  box-shadow: 0 14px 28px -14px rgba(27, 94, 32, 0.75);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.05);
  box-shadow: 0 20px 34px -16px rgba(27, 94, 32, 0.85);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  border-radius: 999px;
  padding: 0.7rem 1.4rem;
  font-weight: 600;
  color: var(--uva);
  text-decoration: none;
  background: rgba(94, 53, 177, 0.08);
  border: 1px solid rgba(94, 53, 177, 0.25);
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn-ghost:hover {
  transform: translateY(-2px);
  background: rgba(94, 53, 177, 0.14);
}

.btn-claro {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 0.85rem;
  padding: 0.9rem 1.6rem;
  font-weight: 700;
  color: var(--verde-oscuro);
  background: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 14px 26px -16px rgba(0, 0, 0, 0.5);
  transition: transform 0.2s ease, filter 0.2s ease;
}

.btn-claro:hover {
  transform: translateY(-2px);
  filter: brightness(0.97);
}

.hero-bg {
  background:
    radial-gradient(1100px 520px at 82% -12%, rgba(94, 53, 177, 0.16), transparent 62%),
    radial-gradient(900px 480px at 8% 8%, rgba(102, 187, 106, 0.22), transparent 60%),
    linear-gradient(180deg, var(--crema) 0%, #F3EEE0 100%);
}

.hero-burbuja {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.5;
  pointer-events: none;
}

.hero-burbuja-1 {
  width: 320px;
  height: 320px;
  top: -80px;
  right: -60px;
  background: rgba(94, 53, 177, 0.35);
}

.hero-burbuja-2 {
  width: 280px;
  height: 280px;
  bottom: -100px;
  left: -70px;
  background: rgba(102, 187, 106, 0.4);
}

.texto-degradado {
  background: linear-gradient(100deg, var(--verde-hoja), var(--uva));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-foto {
  aspect-ratio: 14 / 9;
  min-height: 260px;
}

.tarjeta-flotante {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.85rem 1.1rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid rgba(46, 125, 50, 0.12);
  box-shadow: 0 18px 40px -20px rgba(27, 94, 32, 0.55);
  animation: flotar 5s ease-in-out infinite;
}

@keyframes flotar {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.etiqueta-seccion {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.35rem 1rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--verde-oscuro);
  background: rgba(102, 187, 106, 0.16);
  border: 1px solid rgba(46, 125, 50, 0.2);
}

.tarjeta {
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  border-radius: 1.5rem;
  background: #fff;
  border: 1px solid rgba(46, 125, 50, 0.1);
  box-shadow: 0 20px 45px -32px rgba(27, 94, 32, 0.5);
  transition: transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
}

.tarjeta:hover {
  transform: translateY(-8px);
  border-color: rgba(94, 53, 177, 0.25);
  box-shadow: 0 30px 55px -28px rgba(69, 39, 160, 0.45);
}

.tarjeta-ilustracion {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  border-radius: 1.15rem;
}

.ciencia-bg {
  background:
    radial-gradient(800px 400px at 0% 0%, rgba(102, 187, 106, 0.18), transparent 60%),
    radial-gradient(760px 420px at 100% 100%, rgba(94, 53, 177, 0.14), transparent 60%),
    linear-gradient(180deg, #F6F2E7 0%, #EFE9DA 100%);
}

.mini-tarjeta {
  padding: 1.1rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(46, 125, 50, 0.12);
  box-shadow: 0 14px 30px -26px rgba(27, 94, 32, 0.6);
  transition: transform 0.25s ease;
}

.mini-tarjeta:hover {
  transform: translateY(-4px);
}

.panel-ciencia {
  padding: 1rem;
  border-radius: 1.75rem;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(46, 125, 50, 0.14);
  box-shadow: 0 30px 60px -34px rgba(27, 94, 32, 0.55);
}

.descarga-panel {
  position: relative;
  overflow: hidden;
  padding: 2.5rem;
  border-radius: 2rem;
  background: linear-gradient(135deg, var(--verde-oscuro) 0%, var(--uva-oscuro) 100%);
  box-shadow: 0 34px 60px -30px rgba(27, 94, 32, 0.7);
}

.descarga-panel::before {
  content: '';
  position: absolute;
  inset: -40% -20% auto auto;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.descarga-panel::after {
  content: '';
  position: absolute;
  bottom: -140px;
  left: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(102, 187, 106, 0.18);
  pointer-events: none;
}

.tienda-boton {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 1.15rem;
  border-radius: 0.85rem;
  color: #fff;
  font-weight: 600;
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  cursor: default;
}

.codigo-panel {
  position: relative;
  z-index: 1;
  padding: 1.5rem;
  border-radius: 1.5rem;
  background: #fff;
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.6);
}

.codigo-cuadricula {
  width: 168px;
  height: 168px;
  margin: 0 auto;
  border-radius: 0.75rem;
  background-color: #1B5E20;
  background-image:
    repeating-linear-gradient(90deg, #fff 0 12px, transparent 12px 24px),
    repeating-linear-gradient(0deg, #fff 0 12px, transparent 12px 24px);
  background-size: 24px 24px;
  opacity: 0.92;
}

.footer-link {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: #fff;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}