/* ==========================================================================
   Semillero LOCXUE — Hoja de estilos principal
   Tokens autoritativos: Branding Kit oficial (docs/branding-kit/Branding Locxue/
   Paleta de Colores Locxue.pdf). Reemplaza la paleta provisional previa.
   Navy #0C1940 (dominante) · Púrpura #642EA0 (acento de marca) · Naranja
   #E8762A (reservado exclusivamente a CTAs/alertas) · Noche #060C22 (máx. contraste).
   Tipografía: Playfair Display (titulares), Inter (cuerpo).
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens (custom properties)
   -------------------------------------------------------------------------- */
:root {
  /* Color — Branding Kit oficial Locxue */
  --color-primary: #0C1940;          /* Locxue Navy — dominante institucional */
  --color-primary-medium: #1A2D6B;   /* Navy Medio — hover de botones, tarjetas oscuras */
  --color-primary-light: #2E4799;    /* Navy Claro — estados activos, links */
  --color-secondary: #642EA0;        /* Púrpura Locxue — acento de marca */
  --color-secondary-medium: #6B39A8; /* Púrpura Medio — gradientes, hover de púrpura */
  --color-accent-cta: #E8762A;       /* Naranja CTA — exclusivo para botones de acción y alertas */
  --color-accent-cta-hover: #FF9B45; /* Naranja Medio — hover del CTA */
  --color-dark: #060C22;             /* Noche Locxue — footers y fondos de máximo contraste */
  --color-bg-white: #FFFFFF;
  --color-bg-soft: #E4E8F5;          /* Azul Niebla — fondos sutiles */
  --color-bg-soft-alt: #EDE5F8;      /* Lila Niebla — secciones de énfasis suave */
  --color-text: #0C1940;
  --color-text-inverse: #FFFFFF;
  --color-muted: #5A6478;
  --color-border: #E2E6EE;
  --color-overlay: rgba(12, 25, 64, 0.65);

  /* Tipografía */
  --font-heading: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', Roboto, Helvetica, Arial, sans-serif;
  --fs-h1: clamp(2.25rem, 4vw, 3.5rem);
  --fs-h2: clamp(1.75rem, 3vw, 2.5rem);
  --fs-h3: 1.375rem;
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --lh-body: 1.6;
  --lh-heading: 1.2;

  /* Espaciado */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-12: 6rem;

  /* Layout */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --shadow-sm: 0 1px 2px rgba(26, 43, 76, 0.08);
  --shadow-md: 0 4px 12px rgba(26, 43, 76, 0.12);

  /* Otros */
  --transition-base: 200ms ease;
  --header-height: 72px;
}

/* --------------------------------------------------------------------------
   2. Reset y base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background-color: var(--color-bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
  color: var(--color-primary);
}

h1,
h2,
h3 {
  font-family: var(--font-heading);
  line-height: var(--lh-heading);
  color: var(--color-primary);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); margin-bottom: var(--space-3); }
h3 { font-size: var(--fs-h3); }

p { margin-bottom: var(--space-2); }

ul {
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   3. Utilidades
   -------------------------------------------------------------------------- */
.container,
.section__container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-3);
}

.section {
  position: relative;
  overflow: hidden;
  padding-block: var(--space-6);
}

.section__container {
  padding-block: var(--space-6);
}

.section--alt {
  background-color: var(--color-bg-soft);
}

.section--dark {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: var(--color-text-inverse);
}

.section--dark p,
.section--dark li,
.section--dark a,
.section--dark button {
  color: var(--color-text-inverse);
}

.section__lede {
  max-width: 65ch;
  color: var(--color-muted);
  margin-bottom: var(--space-4);
}

.section--dark .section__lede {
  color: rgba(255, 255, 255, 0.85);
}

.skip-link {
  position: absolute;
  inset-inline-start: var(--space-2);
  inset-block-start: var(--space-2);
  padding: var(--space-1) var(--space-2);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-sm);
  transform: translateY(-200%);
  transition: transform var(--transition-base);
  z-index: 100;
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   4. Componentes reutilizables
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.btn--primary {
  /* Naranja CTA: reservado por el branding kit exclusivamente para acciones principales */
  background-color: var(--color-accent-cta);
  color: var(--color-text-inverse);
  border: 2px solid var(--color-accent-cta);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-accent-cta-hover);
  border-color: var(--color-accent-cta-hover);
  color: var(--color-text-inverse);
}

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

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
}

.cards-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: 1fr;
}

.card {
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card__title {
  font-family: var(--font-heading);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.card__meta {
  font-size: var(--fs-small);
  color: var(--color-muted);
}

.card--person {
  text-align: center;
}

.card__media {
  background-color: var(--color-bg-soft);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-2);
  color: var(--color-muted);
  font-style: italic;
}

.timeline {
  position: relative;
  margin-top: var(--space-6);
  padding-inline-start: var(--space-4);
  border-inline-start: 2px solid var(--color-secondary);
}

.timeline__item {
  margin-block: var(--space-3);
}

.timeline__date {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  color: var(--color-secondary);
  margin-bottom: var(--space-1);
}

.timeline__title {
  font-family: var(--font-heading);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.stats-grid {
  display: grid;
  gap: var(--space-3);
  grid-template-columns: repeat(2, 1fr);
  margin-top: var(--space-4);
}

.stat {
  text-align: center;
  padding: var(--space-3);
  background-color: var(--color-bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.stat__value {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  color: var(--color-secondary);
  display: block;
  line-height: 1;
}

.stat__label {
  font-size: var(--fs-small);
  color: var(--color-muted);
  display: block;
  margin-top: var(--space-1);
}

.brand-watermark {
  position: absolute;
  inset-block: 0;
  inset-inline-end: var(--space-2);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-heading);
  font-size: clamp(2rem, 6vw, 5rem);
  color: rgba(100, 46, 160, 0.08);
  letter-spacing: 0.3em;
  pointer-events: none;
  user-select: none;
}

.section--dark .brand-watermark {
  color: rgba(255, 255, 255, 0.06);
}

.section--hidden {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

/* --------------------------------------------------------------------------
   5. Header / Navegación (Barra Superior Institucional)
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  inset-block-start: 0;
  background-color: rgba(12, 25, 64, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-text-inverse);
  z-index: 1000;
  border-bottom: 2px solid;
  border-image: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%) 1;
  box-shadow: 0 4px 20px rgba(12, 25, 64, 0.25);
}

/* Banner de marca: versión negativa oficial del logotipo (del kit de marca — símbolo
   y nombre "LOCXUE" en blanco) sobre el púrpura institucional, y foto grupal de
   semilleristas en disposición partida. No es sticky — vive debajo del header de
   navegación y encima del contenido de <main>. */
.brand-banner {
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-primary-medium) 100%);
}

.brand-banner__container {
  max-width: var(--container-max);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  gap: var(--space-6);
  padding-block: var(--space-6);
  padding-inline: var(--space-3);
}

.brand-banner__identity {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--space-3);
}

.brand-banner__logo {
  width: 100%;
  max-width: 300px;
  height: auto;
}

.brand-banner__tagline {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--fs-small);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
}

/* Marco tipo "copia impresa": mate blanco alrededor de la foto, en vez de un
   recorte a sangre — separa la fotografía del fondo púrpura con intención. */
.brand-banner__team {
  width: 100%;
  background-color: var(--color-bg-white);
  padding: 10px;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 45px rgba(6, 12, 34, 0.35);
}

.brand-banner__team-frame {
  width: 100%;
  height: 280px;
  overflow: hidden;
  border-radius: calc(var(--radius-md) - 6px);
}

.brand-banner__team-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

@media (min-width: 768px) {
  .brand-banner__team-frame {
    height: 380px;
  }
}

@media (min-width: 1024px) {
  .brand-banner__container {
    grid-template-columns: 1fr 1.35fr;
    gap: var(--space-8);
    padding-block: var(--space-8);
  }

  .brand-banner__identity {
    align-items: flex-start;
    text-align: left;
  }

  .brand-banner__logo {
    max-width: 340px;
  }

  .brand-banner__team-frame {
    height: 460px;
  }
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  max-width: var(--container-max);
  margin-inline: auto;
  padding: 0.75rem var(--space-3);
  min-height: var(--header-height);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: #FFFFFF;
}

.nav__logo-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav__logo-icon {
  width: 34px;
  height: 34px;
  object-fit: contain;
  flex-shrink: 0;
}

.nav__logo-text {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #FFFFFF;
}

.nav__toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.nav__toggle-bar {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-text-inverse);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav__menu {
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  width: 100%;
  padding-block: var(--space-2);
  list-style: none;
  margin: 0;
}

.nav__menu--open {
  display: flex;
}

.nav__menu a,
.nav__link {
  display: inline-block;
  position: relative;
  padding: 0.5rem 0.25rem;
  color: rgba(255, 255, 255, 0.82);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav__menu a:hover,
.nav__link:hover,
.nav__menu a:focus-visible,
.nav__link:focus-visible {
  color: #FFFFFF;
}

/* Indicador Activo (Subrayado inferior exacto como en la foto) */
.nav__link.is-active,
.nav__link--active,
.nav__menu a.is-active,
.nav__menu a.nav__link--active {
  color: #FFFFFF !important;
  font-weight: 600;
}

.nav__link.is-active::after,
.nav__link--active::after,
.nav__menu a.is-active::after,
.nav__menu a.nav__link--active::after {
  content: "";
  position: absolute;
  bottom: -0.75rem;
  left: 0;
  right: 0;
  height: 2.5px;
  background-color: #FFFFFF;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   6. Layout de secciones (específicos por bloque)
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding-block: var(--space-12);
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(var(--color-overlay), var(--color-overlay)),
    radial-gradient(circle at 30% 30%, rgba(100, 46, 160, 0.35), transparent 60%),
    radial-gradient(circle at 80% 70%, rgba(100, 46, 160, 0.2), transparent 55%);
  z-index: 0;
}

.hero__container {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-3);
}

.hero__lede {
  max-width: 55ch;
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.9);
}

.section--alt .card,
.section--dark .card {
  background-color: var(--color-bg-white);
}

.contact__form-note {
  margin-top: var(--space-4);
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.7);
}

/* Formulario de contacto (HU-15) — recibe envíos vía Formspree */
.contact__form {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
  max-width: 560px;
}

.form__row {
  display: grid;
  gap: var(--space-1);
}

.form__row label {
  font-weight: 500;
  color: var(--color-text-inverse);
  font-size: var(--fs-small);
}

.form__row input,
.form__row textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background-color: rgba(255, 255, 255, 0.95);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form__row input:focus-visible,
.form__row textarea:focus-visible {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(58, 35, 110, 0.25);
}

.form__row textarea {
  resize: vertical;
  min-height: 7.5rem;
}

.form__row input::placeholder,
.form__row textarea::placeholder {
  color: var(--color-muted);
}

.form__status {
  margin: 0;
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.85);
}

.form__status[data-state="success"] {
  color: #B8E6C1;
}

.form__status[data-state="error"] {
  color: #F5B8B8;
}

/* Banner "En construcción" — para secciones cuya área no entregó contenido a tiempo. */
.section__notice {
  display: inline-block;
  margin-bottom: var(--space-3);
  padding: var(--space-1) var(--space-2);
  background-color: rgba(58, 35, 110, 0.08);
  border-left: 3px solid var(--color-secondary);
  color: var(--color-secondary);
  font-size: var(--fs-small);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.section--dark .section__notice {
  background-color: rgba(255, 255, 255, 0.08);
  border-left-color: var(--color-text-inverse);
  color: var(--color-text-inverse);
}

/* --------------------------------------------------------------------------
   7. Footer
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
  padding-block: var(--space-6);
}

.footer__container {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}

.footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer__brand img {
  height: 32px;
  width: auto;
}

.footer__brand p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
}

.footer__nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer__nav a {
  color: var(--color-text-inverse);
}

.footer__nav a:hover,
.footer__nav a:focus-visible {
  color: rgba(255, 255, 255, 0.7);
}

.footer__social a {
  color: var(--color-text-inverse);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer__social a:hover,
.footer__social a:focus-visible {
  color: rgba(255, 255, 255, 0.7);
}

.footer__credits {
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

/* --------------------------------------------------------------------------
   8. Responsive (mobile-first)
   -------------------------------------------------------------------------- */

/* Móvil (< 768px) ya queda cubierto por las reglas base.
   Marca de agua más sutil para no saturar pantallas pequeñas. */
@media (max-width: 767px) {
  .brand-watermark {
    opacity: 0.5;
  }
}

/* Tablet ≥ 768px */
@media (min-width: 768px) {
  .nav {
    flex-wrap: nowrap;
  }

  .nav__toggle {
    display: none;
  }

  .nav__menu {
    display: flex;
    flex-direction: row;
    width: auto;
    padding-block: 0;
    gap: var(--space-3);
  }

  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__container {
    align-items: center;
    text-align: center;
  }

  .hero__lede {
    margin-inline: auto;
  }
}

/* Desktop ≥ 1024px */
@media (min-width: 1024px) {
  .section {
    padding-block: var(--space-8);
  }

  .section__container {
    padding-block: var(--space-8);
  }

  .cards-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .footer__container {
    grid-template-columns: 2fr 1fr 1fr;
    align-items: start;
  }

  .footer__credits {
    grid-column: 1 / -1;
  }
}

/* --------------------------------------------------------------------------
   9. Accesibilidad — prefers-reduced-motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .section--hidden,
  .section--visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .brand-watermark {
    opacity: 1;
  }
}

/* --------------------------------------------------------------------------
   10. Módulo de Eventos y Logros
   -------------------------------------------------------------------------- */
.card--achievement {
  position: relative;
  border-inline-start: 4px solid var(--color-secondary);
}

.events-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
}

.filter-btn {
  padding: 0.5rem 1rem;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--color-primary);
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.filter-btn:hover,
.filter-btn:focus-visible {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

.filter-btn--active {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
  border-color: var(--color-secondary);
}

.filter-btn--active:hover,
.filter-btn--active:focus-visible {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.timeline__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-1);
}

.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

.badge--organizer {
  background-color: rgba(58, 35, 110, 0.12);
  color: var(--color-secondary);
}

.badge--speaker {
  background-color: rgba(26, 43, 76, 0.12);
  color: var(--color-primary);
}

.badge--facilitator {
  background-color: #EBF5FF;
  color: #0055B3;
}

.badge--participant {
  background-color: #F0F2F5;
  color: var(--color-muted);
}

.timeline__item[hidden] {
  display: none !important;
}

.upcoming-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: var(--space-4);
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

@media (min-width: 768px) {
  .upcoming-card {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }

  .upcoming-card__content {
    max-width: 75%;
  }
}

.upcoming-card__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}