/* ===== FORZAR MODO CLARO ===== */
:root {
  color-scheme: light only;
}


/* ============================================================
   EDIFICA 2026 — Estilos principales
   Enfoque: mobile-first, fluid typography, CSS custom properties
   ============================================================ */

/* ---------- Skip Link (accesibilidad) ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 10000;
  padding: 1rem 1.5rem;
  background-color: var(--color-accent);
  color: var(--color-dark);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: var(--shadow-lg);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Paleta de color */
  --color-primary: #2D6A5A;
  --color-primary-dark: #1E3A32;
  --color-primary-light: #3D8A73;
  --color-primary-muted: #4A9A85;

  --color-accent: #B9A060;
  --color-accent-dark: #9A8548;
  --color-accent-light: #D1B876;

  --color-dark: #0F1B17;
  --color-dark-soft: #1A2E27;
  --color-text: #1C1C1C;
  --color-text-secondary: #4A5A55;
  --color-text-on-dark: #E8EBE9;
  --color-text-muted: #5C6E67;
  --color-text-muted-on-dark: #9AABA4;

  --color-bg: #FAFAF8;
  --color-surface: #FFFFFF;
  --color-surface-alt: #F0F2F0;
  --color-border: #D8DDD9;

  /* Tipografia fluid */
  --font-display: 'Playfair Display', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --fs-hero: clamp(3rem, 8vw + 1rem, 7.5rem);
  --fs-h1: clamp(2rem, 4vw + 0.5rem, 3.5rem);
  --fs-h2: clamp(1.75rem, 3vw + 0.5rem, 2.75rem);
  --fs-h3: clamp(1.25rem, 2vw + 0.25rem, 1.75rem);
  --fs-lg: clamp(1.175rem, 1.5vw + 0.1rem, 1.4rem);
  --fs-body: clamp(1rem, 0.9vw + 0.25rem, 1.125rem);
  --fs-sm: clamp(0.875rem, 0.5vw + 0.7rem, 1rem);
  --fs-xs: clamp(0.75rem, 0.4vw + 0.6rem, 0.875rem);

  /* Espaciado fluid */
  --space-xs: clamp(0.5rem, 1vw, 0.75rem);
  --space-sm: clamp(0.75rem, 1.5vw, 1.25rem);
  --space-md: clamp(1.5rem, 3vw, 2.5rem);
  --space-lg: clamp(2.5rem, 5vw, 4rem);
  --space-xl: clamp(4rem, 8vw, 7rem);
  --space-2xl: clamp(5rem, 10vw, 10rem);

  /* Radios */
  --radius-sm: 0.375rem;
  --radius-md: 0.75rem;
  --radius-lg: 1.25rem;
  --radius-full: 9999px;

  /* Sombras */
  --shadow-sm: 0 1px 3px rgba(15, 27, 23, 0.1);
  --shadow-md: 0 4px 12px rgba(15, 27, 23, 0.12);
  --shadow-lg: 0 12px 32px rgba(15, 27, 23, 0.14);
  --shadow-xl: 0 20px 48px rgba(15, 27, 23, 0.18);

  /* Transiciones — curvas refinadas para movimiento natural */
  --transition-fast: 150ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-base: 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-slow: 500ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-bounce: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Navegacion */
  --nav-height: 4rem;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

address {
  font-style: normal;
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

::selection {
  background-color: var(--color-primary);
  color: var(--color-text-on-dark);
}

/* ---------- Utilidades de layout ---------- */
.container {
  width: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.container--narrow {
  max-width: 52rem;
}

.section {
  padding-block: var(--space-xl);
}

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

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

.section__eyebrow {
  font-family: var(--font-body);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.section__eyebrow--light {
  color: var(--color-primary-muted);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.section__title--light {
  color: var(--color-text-on-dark);
}

.section__subtitle {
  font-size: var(--fs-lg);
  color: var(--color-text-secondary);
  max-width: 40rem;
  margin-bottom: var(--space-lg);
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1;
  padding: 0.875rem 1.75rem;
  border: 2px solid transparent;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition:
    background-color var(--transition-base),
    border-color var(--transition-base),
    color var(--transition-base),
    transform var(--transition-bounce),
    box-shadow var(--transition-base);
  white-space: nowrap;
  position: relative;
}

/* Estado active — feedback tactil inmediato */
.btn:active {
  transform: translateY(0) scale(0.97);
  transition-duration: 80ms;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-dark);
  border-color: var(--color-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(185, 160, 96, 0.3);
}

.btn--primary:active {
  background-color: var(--color-accent-dark);
  transform: translateY(0) scale(0.97);
  box-shadow: 0 2px 8px rgba(200, 169, 81, 0.2);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-surface);
  border-color: rgba(255, 255, 255, 0.4);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.8);
  transform: translateY(-2px);
}

.btn--outline:active {
  background-color: rgba(255, 255, 255, 0.15);
}

.btn--outline-light {
  background-color: transparent;
  color: var(--color-text-on-dark);
  border-color: rgba(255, 255, 255, 0.3);
}

.btn--outline-light:hover,
.btn--outline-light:focus-visible {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
  transform: translateY(-2px);
}

.btn--outline-light:active {
  background-color: rgba(255, 255, 255, 0.15);
}

.btn--lg {
  font-size: var(--fs-body);
  padding: 1rem 2.25rem;
}

.btn--nav {
  background-color: var(--color-accent);
  color: var(--color-dark);
  border-color: var(--color-accent);
  padding: 0.625rem 1.25rem;
  font-size: var(--fs-xs);
}

.btn--nav:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-1px);
}

/* ---------- Navegacion ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.nav--scrolled {
  background-color: rgba(15, 27, 23, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: 72rem;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  z-index: 1001;
  transition: opacity var(--transition-fast);
}

.nav__logo:hover {
  opacity: 0.85;
}

.nav__logo-img {
  height: 2.5rem;
  width: auto;
}

/* --- Hamburguesa con animacion refinada --- */
.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.25rem;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 1001;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.nav__toggle:hover {
  background-color: rgba(255, 255, 255, 0.08);
}

.nav__toggle:active {
  background-color: rgba(255, 255, 255, 0.12);
}

.nav__toggle-line {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-surface);
  border-radius: 2px;
  transition:
    transform 350ms cubic-bezier(0.68, -0.55, 0.27, 1.55),
    opacity 200ms cubic-bezier(0.25, 0.46, 0.45, 0.94),
    width var(--transition-base);
  transform-origin: center;
}

/* Linea central mas corta al hover — detalle sutil */
.nav__toggle:hover .nav__toggle-line:nth-child(2) {
  width: 70%;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav__toggle[aria-expanded="true"]:hover .nav__toggle-line:nth-child(2) {
  width: 100%;
}

.nav__menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 85vw; /* fallback para navegadores sin min() */
  max-width: 24rem;
  width: min(85vw, 24rem);
  height: 100vh;
  height: 100dvh;
  background-color: var(--color-dark);
  padding: calc(var(--nav-height) + 2rem) 2rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  transform: translateX(100%);
  transition: transform 400ms cubic-bezier(0.32, 0.72, 0, 1);
  overflow-y: auto;
  will-change: transform;
}

.nav__menu.is-open {
  transform: translateX(0);
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav__link {
  display: block;
  padding: 0.75rem 0.5rem;
  font-size: var(--fs-body);
  font-weight: 500;
  color: var(--color-text-on-dark);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), padding-left var(--transition-base);
}

.nav__link:hover {
  color: var(--color-accent);
  padding-left: 0.75rem;
}

.nav__link--active {
  color: var(--color-accent);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  min-height: 100dvh;
  background-color: var(--color-dark);
  background-image:
    radial-gradient(ellipse at 30% 50%, rgba(45, 106, 90, 0.3) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 80%, rgba(45, 106, 90, 0.15) 0%, transparent 50%);
  text-align: center;
  padding: var(--nav-height) 1.5rem 3rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 49px,
      rgba(255, 255, 255, 0.015) 50px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 49px,
      rgba(255, 255, 255, 0.015) 50px
    );
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 52rem;
}

.hero__heading {
  margin-bottom: 3.5rem;
  animation: hero-fade-up 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.2s both;
}

.hero__image {
  display: block;
  width: clamp(20rem, 75vw, 52rem);
  height: auto;
  margin-inline: auto;
}

.hero__description {
  font-size: var(--fs-lg);
  color: rgba(200, 210, 206, 0.85);
  max-width: 36rem;
  margin-inline: auto;
  margin-bottom: var(--space-md);
  animation: hero-fade-up 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.55s both;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  animation: hero-fade-up 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.7s both;
}

.hero__venue {
  font-size: var(--fs-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgba(255, 255, 255, 0.6);
  animation: hero-fade-up 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 0.85s both;
}

@keyframes hero-fade-up {
  from {
    opacity: 0;
    transform: translateY(1.25rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Indicador de scroll del hero --- */
.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  animation: hero-fade-up 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) 1.2s both;
  transition: opacity var(--transition-slow);
}

.hero__scroll--hidden {
  opacity: 0;
  pointer-events: none;
}

.hero__scroll span {
  display: block;
  width: 1.5rem;
  height: 2.5rem;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-full);
  position: relative;
  transition: border-color var(--transition-base);
}

.hero__scroll:hover span {
  border-color: rgba(255, 255, 255, 0.45);
}

.hero__scroll span::after {
  content: '';
  display: block;
  width: 3px;
  height: 6px;
  background-color: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-full);
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scroll-indicator 2.4s cubic-bezier(0.45, 0, 0.55, 1) infinite;
}

@keyframes scroll-indicator {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  40% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }
}

/* ---------- Acerca de ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.about__text {
  font-size: var(--fs-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  line-height: 1.8;
}

.about__text:last-child {
  margin-bottom: 0;
}

.about__image {
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--color-primary-dark);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}

.about__image img {
  width: min(14rem, 70%);
  height: auto;
}

/* ---------- Expositor ---------- */
.speaker__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
  align-items: center;
}

.speaker__photo-wrapper {
  display: flex;
  justify-content: center;
}

.speaker__photo {
  width: 100%; /* fallback para navegadores sin min() */
  max-width: 22rem;
  width: min(22rem, 100%);
  height: 26.4rem; /* fallback para navegadores sin aspect-ratio */
  aspect-ratio: 5 / 6;
  object-fit: cover;
  object-position: top center;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}

@supports (aspect-ratio: 5 / 6) {
  .speaker__photo {
    height: auto;
  }
}

.speaker__photo:hover {
  transform: scale(1.02);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.22);
}

.speaker__name {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--space-xs);
}

.speaker__role {
  font-size: var(--fs-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary-muted);
  margin-bottom: var(--space-md);
}

.speaker__bio {
  font-size: var(--fs-body);
  line-height: 1.8;
  color: rgba(232, 235, 233, 0.8);
  margin-bottom: var(--space-sm);
}

.speaker__bio:last-child {
  margin-bottom: 0;
}

/* ---------- Temas ---------- */
.topics__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
  container-type: inline-size;
  container-name: topics;
}

.topic-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  transition:
    transform var(--transition-bounce),
    box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.topic-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary-light);
}

.topic-card:active {
  transform: translateY(-2px);
  transition-duration: 100ms;
}

.topic-card__number {
  display: inline-block;
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.2;
  line-height: 1;
  margin-bottom: var(--space-xs);
  transition: opacity var(--transition-base);
}

.topic-card:hover .topic-card__number {
  opacity: 0.4;
}

.topic-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.topic-card:hover .topic-card__title {
  color: var(--color-primary-dark);
}

.topic-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.topics__cta {
  text-align: center;
  margin-top: var(--space-lg);
}

/* Container queries */
@container topics (min-width: 32rem) {
  .topics__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@container topics (min-width: 52rem) {
  .topics__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@container details (min-width: 28rem) {
  .details__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@container details (min-width: 48rem) {
  .details__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- Regalo ---------- */
.gift__container {
  text-align: center;
  max-width: 36rem;
  margin-inline: auto;
}

.gift__icon {
  margin-bottom: var(--space-sm);
  color: rgba(255, 255, 255, 0.7);
}

.gift__icon svg,
.gift__icon img {
  transition: transform var(--transition-slow);
}

.gift__logo {
  width: clamp(4rem, 8vw, 6rem);
  height: auto;
  margin-inline: auto;
  display: block;
  border-radius: var(--radius-sm);
}

.gift__container:hover .gift__icon svg,
.gift__container:hover .gift__icon img {
  transform: scale(1.08);
}

.gift__title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.gift__text {
  font-size: var(--fs-lg);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
}

/* ---------- Detalles ---------- */
.details__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
  container-type: inline-size;
  container-name: details;
}

.detail-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition:
    box-shadow var(--transition-base),
    transform var(--transition-bounce),
    border-color var(--transition-base);
}

.detail-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(45, 106, 90, 0.25);
}

.detail-card__icon {
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
  transition: transform var(--transition-base);
}

.detail-card:hover .detail-card__icon {
  transform: scale(1.1);
}

.detail-card__label {
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.detail-card__value {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
}

.detail-card__extra {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  margin-top: 0.25rem;
}

/* ---------- Ubicacion ---------- */
.location__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-lg);
}

.location__map {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  padding-bottom: 75%; /* fallback 4:3 para navegadores sin aspect-ratio */
  height: 0;
  aspect-ratio: 4 / 3;
  box-shadow: var(--shadow-lg);
}

@supports (aspect-ratio: 4 / 3) {
  .location__map {
    padding-bottom: 0;
    height: auto;
    position: static;
  }
}

.location__map iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

@supports (aspect-ratio: 4 / 3) {
  .location__map iframe {
    position: static;
  }
}

.location__address {
  font-size: var(--fs-lg);
  line-height: 1.8;
  margin-bottom: var(--space-md);
}

.location__transport {
  margin-bottom: var(--space-md);
}

.location__transport-title {
  font-size: var(--fs-body);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.location__transport p {
  font-size: var(--fs-sm);
  color: rgba(232, 235, 233, 0.75);
  line-height: 1.7;
}

/* ---------- FAQ — Accordion con transicion suave ---------- */
.faq__list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq__item {
  border-bottom: 1px solid var(--color-border);
}

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: var(--space-sm) 0;
  font-size: var(--fs-body);
  font-weight: 600;
  color: var(--color-text);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast);
  -webkit-tap-highlight-color: transparent;
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__question::marker {
  display: none;
  content: '';
}

.faq__question::after {
  content: '';
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='20' viewBox='0 0 24 24' fill='none' stroke='%232D6A5A' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cline x1='12' y1='5' x2='12' y2='19'%3E%3C/line%3E%3Cline x1='5' y1='12' x2='19' y2='12'%3E%3C/line%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  transition: transform 350ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.faq__item[open] .faq__question::after {
  transform: rotate(45deg);
}

.faq__question:hover {
  color: var(--color-primary);
}

/* Transicion suave de apertura/cierre */
.faq__answer {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition:
    max-height 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94),
    opacity 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94),
    padding 300ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  padding-bottom: 0;
}

.faq__item[open] .faq__answer {
  max-height: 12rem;
  opacity: 1;
  padding-bottom: var(--space-sm);
}

.faq__answer p {
  font-size: var(--fs-sm);
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ---------- CTA final ---------- */
.cta {
  background-color: var(--color-dark);
  color: var(--color-text-on-dark);
  padding-block: var(--space-xl);
}

.cta__container {
  text-align: center;
  max-width: 40rem;
  margin-inline: auto;
}

.cta__title {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.cta__text {
  font-size: var(--fs-body);
  color: var(--color-text-muted-on-dark);
  margin-bottom: var(--space-md);
}

/* ---------- Footer ---------- */
.footer {
  background-color: var(--color-dark-soft);
  color: var(--color-text-on-dark);
  padding-block: var(--space-lg);
}

.footer__container {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer__brand img {
  height: 3rem;
  width: auto;
}

.footer__name {
  font-family: var(--font-display);
  font-size: var(--fs-h3);
  font-weight: 600;
}

.footer__org {
  font-size: var(--fs-xs);
  color: var(--color-text-muted-on-dark);
}

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

.footer__heading {
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted-on-dark);
  margin-bottom: var(--space-xs);
}

.footer__col ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__col a {
  font-size: var(--fs-sm);
  color: rgba(232, 235, 233, 0.7);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer__col a:hover {
  color: var(--color-accent);
  padding-left: 0.25rem;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-sm);
}

.footer__bottom p {
  font-size: var(--fs-xs);
  color: var(--color-text-muted-on-dark);
}

/* ---------- Animaciones de scroll ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(1.25rem);
  transition:
    opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94),
    transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Variantes direccionales */
.fade-in--left {
  transform: translateX(-1.5rem) translateY(0);
}

.fade-in--left.is-visible {
  transform: translateX(0) translateY(0);
}

.fade-in--right {
  transform: translateX(1.5rem) translateY(0);
}

.fade-in--right.is-visible {
  transform: translateX(0) translateY(0);
}

/* Delays escalonados */
.fade-in--delay-1 { transition-delay: 0.1s; }
.fade-in--delay-2 { transition-delay: 0.2s; }
.fade-in--delay-3 { transition-delay: 0.3s; }

/* ---------- Overlay para menu movil ---------- */
.nav__overlay {
  position: fixed;
  top: 0; right: 0; bottom: 0; left: 0;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 400ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.nav__overlay.is-visible {
  opacity: 1;
  pointer-events: auto;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (min-width: 40rem) {
  .details__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .topics__grid .topic-card:last-child {
    grid-column: 1 / -1;
    max-width: 50%;
    justify-self: center;
  }
}

@media (min-width: 48rem) {
  .about__grid {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .speaker__grid {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .location__grid {
    grid-template-columns: 1.2fr 0.8fr;
  }

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

@media (min-width: 64rem) {
  :root {
    --nav-height: 5rem;
  }

  .nav__toggle {
    display: none;
  }

  .nav__menu {
    position: static;
    width: auto;
    height: auto;
    background-color: transparent;
    padding: 0;
    flex-direction: row;
    align-items: center;
    gap: 0.5rem;
    transform: none;
    overflow: visible;
  }

  .nav__list {
    flex-direction: row;
    gap: 0;
    border: none;
  }

  .nav__link {
    padding: 0.5rem 0.65rem;
    font-size: var(--fs-xs);
    border-bottom: none;
    border-radius: var(--radius-sm);
    position: relative;
    transition: color var(--transition-fast), background-color var(--transition-fast);
  }

  .nav__link:hover {
    background-color: rgba(255, 255, 255, 0.08);
    color: var(--color-text-on-dark);
    padding-left: 0.875rem;
  }

  .nav__link--active {
    color: var(--color-accent);
  }

  .nav__link--active::after {
    content: '';
    position: absolute;
    bottom: 0.125rem;
    left: 0.875rem;
    right: 0.875rem;
    height: 2px;
    background-color: var(--color-accent);
    border-radius: 1px;
    opacity: 0.7;
  }

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

  .topics__grid .topic-card:last-child {
    grid-column: auto;
    max-width: none;
    justify-self: auto;
  }

  .footer__container {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .footer__brand {
    flex-basis: 100%;
    margin-bottom: var(--space-sm);
  }

  .footer__links {
    gap: var(--space-lg);
  }

  .footer__bottom {
    flex-basis: 100%;
  }
}

@media (min-width: 80rem) {
  .about__grid {
    gap: var(--space-xl);
  }

  .speaker__grid {
    gap: var(--space-xl);
  }
}

/* ---------- Preferencias de usuario ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }

  .hero__eyebrow,
  .hero__title,
  .hero__subtitle,
  .hero__description,
  .hero__actions,
  .hero__venue,
  .hero__scroll {
    animation: none;
    opacity: 1;
    transform: translateX(-50%);
  }

  .hero__eyebrow,
  .hero__title,
  .hero__subtitle,
  .hero__description,
  .hero__actions,
  .hero__venue {
    transform: none;
  }
}


/* ---------- Print ---------- */
@media print {
  .nav,
  .hero__scroll,
  .btn,
  .topics__cta,
  .cta,
  .location__map,
  .nav__overlay {
    display: none !important;
  }

  body {
    color: #000;
    background: #fff;
    font-size: 12pt;
  }

  .section--dark,
  .section--accent {
    background: #fff;
    color: #000;
  }

  .hero {
    min-height: auto;
    background: #fff;
    color: #000;
    padding: 1cm 0;
  }

  .hero__title,
  .hero__subtitle,
  .hero__description {
    color: #000;
  }

  .speaker__bio,
  .location__transport p {
    color: #333;
  }

  .about__grid,
  .speaker__grid,
  .topics__grid,
  .details__grid,
  .location__grid {
    grid-template-columns: 1fr;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }

  .topic-card,
  .detail-card,
  .faq__item {
    break-inside: avoid;
  }

  .section {
    padding-block: 1cm;
  }
}