/* =========================================================
   Día de la IA 2026 — Micrositio
   Variables de marca (ver /styles/info elementos graficos micrositio.txt)
   ========================================================= */
:root {
  --color-titulo: #242c90;
  --color-cyan: #00ffff;
  --gradient-start: #7d00bf;
  --gradient-end: #370394;
  --bg-claro: #dcdcef;
  --btn-inscribete-bg: #4a24f7;
  --btn-descarga-bg: #782bdd;
  --font: 'Fira Sans', Arial, sans-serif;
  --max-width: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: #fff;
  color: #222;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Empuja el footer al fondo cuando el contenido de la página es más corto
   que la ventana (por ejemplo, materiales.html), sin afectar el scroll
   normal cuando el contenido sí es más largo. */
main { flex: 1 0 auto; }

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: #fff;
  color: #000;
  padding: 8px 16px;
  z-index: 999;
}
.skip-link:focus { left: 8px; top: 8px; }

/* ===================== HERO ===================== */
.hero {
  position: relative;
  background: linear-gradient(160deg, var(--gradient-start), var(--gradient-end));
  padding: 20px 24px 40px;
}

.hero__texture {
  position: absolute;
  inset: 0;
  background-image: url('../images/circuito_textura.png');
  background-repeat: repeat;
  opacity: 0.12;
  pointer-events: none;
}

.hero__topbar {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto 24px;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__logo { height: 60px; width: auto; }
.hero__logo--left, .hero__logo--right { height: 58px; }

.hero__partners {
  position: relative;
  max-width: 560px;
  margin: 32px auto 0;
  text-align: center;
}
.hero__partners img { margin: 0 auto; }

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

.hero__copy { max-width: 560px; flex: 1 1 320px; }

.hero__main-logo { width: min(340px, 80%); margin-bottom: 20px; }

.hero__text {
  font-family: var(--font);
  font-weight: 500; /* Medium */
  font-size: clamp(18px, 2.4vw, 26pt);
  color: #ffffff;
  margin: 0 0 24px;
  line-height: 1.3;
}

.hero__ctas {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}
.hero__ctas .btn { text-align: left; }

.hero__mascota { flex: 0 1 380px; max-width: 380px; }

/* ===================== BOTONES ===================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  text-decoration: none;
  border: none;
  border-radius: 999px;
  cursor: pointer;
  text-align: center;
  font-family: var(--font);
  line-height: 1.25;
  transition: transform .15s ease, opacity .15s ease, box-shadow .15s ease;
}
.btn:hover:not(:disabled) { transform: translateY(-2px); }
.btn:active:not(:disabled) { transform: translateY(0); }

.btn--home {
  font-weight: 700; /* Bold */
  font-size: clamp(16px, 1.8vw, 25pt);
  color: var(--color-cyan);
  background: var(--btn-inscribete-bg);
  padding: 14px 32px;
  box-shadow: 0 6px 18px rgba(0,0,0,.25);
}

.btn--inscribete {
  font-weight: 600; /* Semibold */
  font-size: clamp(15px, 1.6vw, 22pt);
  color: var(--color-cyan);
  background: var(--btn-inscribete-bg);
  padding: 16px 28px;
  white-space: normal;
}

.btn--descarga {
  font-weight: 600;
  font-size: clamp(14px, 1.4vw, 18pt);
  color: var(--color-cyan);
  background: var(--btn-descarga-bg);
  padding: 14px 26px;
}

.btn--participacion {
  font-weight: 600;
  font-size: clamp(13px, 1.3vw, 16pt);
  color: var(--color-cyan);
  background: var(--btn-descarga-bg);
  padding: 14px 26px;
  max-width: 640px;
}
.btn--participacion:disabled {
  background: #9a9a9a;
  color: #eee;
  cursor: not-allowed;
  opacity: .8;
  box-shadow: none;
}
.btn--participacion.is-enabled {
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(120,43,221,.55); }
  50% { box-shadow: 0 0 0 10px rgba(120,43,221,0); }
}

.btn--curso {
  font-weight: 700;
  font-size: clamp(15px, 1.6vw, 20pt);
  color: var(--color-cyan);
  background: var(--btn-inscribete-bg);
  padding: 12px 28px;
}

/* ===================== SECCIONES GENÉRICAS ===================== */
.section {
  padding: 56px 24px;
  text-align: center;
}

.section--intro {
  position: relative;
  background-color: var(--bg-claro);
  background-image:
    linear-gradient(to bottom, rgba(55,3,148,.16), transparent 70px),
    linear-gradient(rgba(220,220,239,.9), rgba(220,220,239,.9)),
    url('../images/svg/circuito_textura02.svg');
  background-repeat: no-repeat, repeat, repeat;
  background-size: 100% 70px, 220px, 220px;
  background-position: top, center, center;
}

.intro-card {
  background: #fff;
  border: 2px solid var(--color-titulo);
  border-radius: 18px;
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 40px;
  box-shadow: 0 10px 30px rgba(36,44,144,.15);
}
.intro-card p:last-child { margin-bottom: 0; }

.text-intro {
  font-weight: 600; /* Semibold */
  font-size: clamp(20px, 2.6vw, 30pt);
  color: var(--color-titulo);
  margin: 0 0 18px;
  line-height: 1.35;
}

.titulo {
  font-weight: 800; /* Extrabold */
  font-size: clamp(22px, 3vw, 36pt);
  color: var(--color-titulo);
  margin: 0 auto 8px;
  max-width: 900px;
}

.texto-intro {
  font-weight: 500; /* Medium */
  font-size: clamp(15px, 1.6vw, 22pt);
  color: var(--color-titulo);
  margin: 0 auto 28px;
  max-width: 900px;
}

/* ===================== VIDEO ===================== */
.section--video {
  position: relative;
  background-color: var(--gradient-end);
  background-image:
    linear-gradient(to bottom, rgba(220,220,239,.85), transparent 70px),
    url('../images/svg/fondo_video.svg');
  background-repeat: no-repeat, no-repeat;
  background-size: 100% 70px, cover;
  background-position: top, center;
  padding-top: 40px;
  padding-bottom: 40px;
}

.video-caption {
  max-width: 640px;
  margin: 0 auto 20px;
  background: none;
  border: none;
  padding: 0;
  color: var(--color-cyan);
  font-weight: 800;
  font-size: clamp(20px, 2.8vw, 30px);
  line-height: 1.3;
  text-align: center;
  text-shadow: 0 2px 10px rgba(0,0,0,.5);
}

.video-row {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 8px;
  max-width: 1000px;
  margin: 0 auto;
}

.video-mascota {
  flex: 0 0 auto;
  width: 160px;
  margin-bottom: -6px;
}

.video-column {
  flex: 1 1 auto;
  max-width: 780px;
}

.video-wrapper {
  position: relative;
  width: 100%;
  max-width: 780px;
  margin: 0 auto;
  padding-top: 56.25%; /* 16:9, relativo al ancho propio del elemento */
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 12px 32px rgba(0,0,0,.35);
}
.video-wrapper iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ===================== CTAs ===================== */
.section--ctas { background: var(--bg-claro); padding-top: 40px; }
.ctas { display: flex; flex-direction: column; align-items: center; gap: 20px; }
.cta-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; justify-content: center; }
.arrow { color: var(--btn-inscribete-bg); font-weight: 700; font-size: 20px; letter-spacing: 2px; }

/* ===================== INFOGRAFÍA / CURSO ===================== */
.section--infografia {
  position: relative;
  background-color: #fff;
  background-image:
    linear-gradient(to bottom, rgba(55,3,148,.14), transparent 70px),
    linear-gradient(rgba(255,255,255,.94), rgba(255,255,255,.94)),
    url('../images/svg/circuito_textura02.svg');
  background-repeat: no-repeat, repeat, repeat;
  background-size: 100% 70px, 220px, 220px;
  background-position: top, center, center;
  overflow: hidden;
}
.infografia-brazo {
  position: absolute;
  top: -20px;
  right: max(0px, calc(50% - 600px));
  width: 160px;
  opacity: .9;
  pointer-events: none;
}
.infografia-box {
  position: relative;
  background: var(--bg-claro);
  border-radius: 20px;
  padding: 16px;
  max-width: 900px;
  margin: 0 auto;
}
.infografia-box img { border-radius: 12px; }

.section--curso { display: none; background: var(--bg-claro); }
.btn__arrow { font-size: 14px; }

/* ===================== GALERÍA ===================== */
.section--galeria { background: #fff; padding: 56px 0 0; }
.galeria-header { padding: 0 24px 32px; }

.galeria-band {
  position: relative;
  background-color: var(--gradient-end);
  background-image:
    linear-gradient(to bottom, rgba(255,255,255,.45), transparent 50px),
    linear-gradient(160deg, var(--gradient-start), var(--gradient-end));
  background-repeat: no-repeat, no-repeat;
  background-size: 100% 50px, 100% 100%;
  background-position: top, center;
  padding: 32px 24px;
}

.galeria {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.galeria__track {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px 4px 16px;
  scroll-behavior: smooth;
  flex: 1;
}
.galeria__track::-webkit-scrollbar { height: 8px; }
.galeria__track::-webkit-scrollbar-thumb { background: var(--btn-descarga-bg); border-radius: 8px; }

.galeria__item {
  scroll-snap-align: start;
  flex: 0 0 auto;
  width: 280px;
  border-radius: 14px;
  overflow: hidden;
  background: #000;
  position: relative;
  cursor: pointer;
}
.galeria__item img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  transition: transform .3s ease;
}
.galeria__item:hover img { transform: scale(1.05); }
.galeria__caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  background: linear-gradient(transparent, rgba(0,0,0,.75));
  color: #fff;
  font-size: 13px;
  padding: 20px 10px 8px;
  text-align: left;
}

.galeria__nav {
  flex: 0 0 auto;
  border: none;
  background: transparent;
  color: var(--color-cyan);
  width: 32px;
  height: 32px;
  font-size: 26px;
  cursor: pointer;
  line-height: 1;
}
.galeria__nav:hover { color: #fff; }

.galeria__dots { display: none; }

/* ===================== LIGHTBOX ===================== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 24px;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 100%; max-height: 90vh; border-radius: 8px; }
.lightbox__close {
  position: absolute;
  top: 16px; right: 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 40px;
  cursor: pointer;
  line-height: 1;
}

/* ===================== MODAL DESCARGA GUÍA ===================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal[hidden] { display: none; }
.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(20, 10, 40, .6);
}
.modal__panel {
  position: relative;
  background: #fff;
  border-radius: 18px;
  max-width: 480px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 32px 28px 28px;
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
  text-align: left;
  font-family: var(--font);
}
.modal__close {
  position: absolute;
  top: 12px; right: 14px;
  background: none;
  border: none;
  font-size: 28px;
  line-height: 1;
  color: #888;
  cursor: pointer;
}
.modal__close:hover { color: var(--color-titulo); }
.modal__title {
  font-weight: 800;
  font-size: 20px;
  color: var(--color-titulo);
  margin: 0 0 4px;
}
.modal__subtitle {
  font-size: 14px;
  color: #555;
  margin: 0 0 20px;
}
.modal__field {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-titulo);
  margin-bottom: 14px;
}
.modal__field input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 10px 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 14px;
  font-family: var(--font);
  font-weight: 400;
}
.modal__field input:focus { outline: 2px solid var(--btn-inscribete-bg); outline-offset: 1px; }
.modal__field.has-error input { border-color: #c0392b; }
.modal__error {
  display: block;
  color: #c0392b;
  font-size: 12px;
  margin-top: 4px;
  min-height: 14px;
}
.modal__legal {
  font-size: 11.5px;
  line-height: 1.5;
  color: #666;
  background: #f7f6fb;
  border-radius: 10px;
  padding: 12px 14px;
  margin: 4px 0 14px;
  font-weight: 400;
}
.modal__legal a { color: var(--btn-inscribete-bg); }
.modal__checkbox {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: #333;
  cursor: pointer;
  margin-bottom: 4px;
}
.modal__checkbox input { margin-top: 3px; }
.modal__form-error {
  background: #fdeaea;
  color: #a12626;
  border: 1px solid #f3b8b8;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 13px;
  margin: 12px 0 0;
}
.modal__success {
  font-size: 14px;
  color: #1e7c1e;
  background: #e3f7e3;
  border: 1px solid #b6e2b6;
  border-radius: 8px;
  padding: 14px 16px;
  margin-top: 12px;
}
.modal__submit {
  width: 100%;
  margin-top: 18px;
  justify-content: center;
}
.modal__submit:disabled { opacity: .6; cursor: not-allowed; }

/* ===================== PÁGINA DE MATERIALES ===================== */
.materiales-page { max-width: var(--max-width); margin: 0 auto; padding: 40px 24px 72px; }

.materiales-volver { max-width: 900px; margin: 0 auto 28px; }
.materiales-volver a {
  color: var(--color-titulo);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
}
.materiales-volver a:hover { text-decoration: underline; }

.materiales-guia { text-align: center; padding-top: 8px; padding-bottom: 32px; }

.materiales-descargas {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}
.materiales-descargas .btn { min-width: 280px; }

.materiales-niveles-header {
  text-align: center;
  padding-top: 32px;
  padding-bottom: 8px;
  border-top: 1px solid #eee;
}
.materiales-niveles-header .titulo { margin-bottom: 6px; }
.materiales-niveles-header .texto-intro { margin-bottom: 0; }

.materiales-niveles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  text-align: left;
  padding-top: 28px;
}

.nivel-card {
  background: linear-gradient(160deg, var(--gradient-start), var(--gradient-end));
  border-radius: 20px;
  padding: 24px;
  color: #fff;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.nivel-card__titulo {
  color: var(--color-cyan);
  font-weight: 800;
  font-size: 20px;
  margin: 0;
}
.nivel-card__subtitulo {
  margin: 0 0 4px;
  font-weight: 500;
  font-size: 14px;
  opacity: .9;
}
.nivel-card__toggle {
  align-self: flex-start;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.4);
  color: #fff;
  border-radius: 999px;
  padding: 8px 18px;
  font-family: var(--font);
  font-size: 14px;
  cursor: pointer;
}
.nivel-card__toggle span { display: inline-block; transition: transform .2s ease; }
.nivel-card__toggle.is-open span { transform: rotate(180deg); }

.nivel-card__lista {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.nivel-card__lista[hidden] { display: none; }
.nivel-card__item a {
  display: block;
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  background: rgba(255,255,255,.1);
  border-radius: 10px;
  padding: 8px 12px;
  transition: background .15s ease;
}
.nivel-card__item a:hover { background: rgba(255,255,255,.2); }
.nivel-card__item a::before { content: "⬇ "; }
.nivel-card__item--vacio { font-size: 13px; opacity: .8; padding: 4px 2px; }

.nivel-card__zip.btn--descarga {
  margin-top: 4px;
  justify-content: center;
  background: var(--color-cyan);
  color: var(--gradient-end);
}
.nivel-card__zip.btn--descarga:hover { opacity: .9; }
.nivel-card__zip[hidden] { display: none; }

/* ===================== FOOTER ===================== */
.footer {
  background: var(--gradient-end);
  padding: 32px 24px;
  text-align: center;
}
.footer__aliados {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.footer__aliados img {
  height: 40px;
  width: auto;
  background: #fff;
  border-radius: 10px;
  padding: 8px 14px;
}
.footer__copy { color: #cfc7ea; font-size: 13px; margin: 0; }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 720px) {
  .hero__content { flex-direction: column; text-align: center; }
  .hero__copy { text-align: center; }
  .hero__ctas { align-items: center; }
  .hero__ctas .btn { text-align: center; }
  .hero__mascota { max-width: 220px; }
  .section { padding: 40px 16px; }
  .intro-card { padding: 24px 20px; }
  .video-mascota { display: none; }
  .infografia-brazo { width: 100px; top: -10px; }
  .galeria__item { width: 220px; }
  .section--galeria { padding: 40px 0 0; }
  .galeria-header { padding: 0 16px 24px; }
  .galeria-band { padding: 20px 12px; }
  .btn--participacion { font-size: 13px; padding: 12px 18px; }
  .materiales-page { padding: 24px 16px 48px; }
  .materiales-niveles { grid-template-columns: 1fr; }
  .materiales-descargas { flex-direction: column; align-items: stretch; }
  .materiales-descargas .btn { min-width: 0; }
}