/* ============================================================
   BLOQUE CIUDADANO MEXICALENSE — Landing "Reforma Electoral BC"
   Hoja de estilos propia. Mobile-first. Breakpoints: 640 / 900 / 1200.
   ============================================================ */

/* ---------- 1. Variables globales ---------- */
:root {
  /* Paleta (leída del flyer assets/Bloque_septiembre.jpeg) */
  --azul-profundo: #1B4FD8;
  --azul-medio: #2E9BE8;
  --azul-claro: #8FCEF2;
  --verde-lima: #8CC63E;
  --verde-claro: #A8D45E;
  --negro: #111111;
  --gris-texto: #4A4A4A;
  --gris-borde: #DCE1E6;
  --gris-fondo: #F7F9FB;
  --blanco: #FFFFFF;

  /* Tipografía */
  --font-base: "Inter", Arial, sans-serif;

  /* Layout */
  --max-width: 1120px;
  --radio-boton: 999px;
  --sombra-suave: 0 4px 16px rgba(17, 17, 17, 0.08);
  --sombra-header: 0 2px 12px rgba(17, 17, 17, 0.10);

  /* Transiciones */
  --transicion: 0.2s ease;
}

/* ---------- 2. Reset básico ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--gris-texto);
  background: var(--blanco);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

h1, h2, h3, h4 {
  color: var(--negro);
  margin: 0;
}

p {
  margin: 0 0 1em;
}

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font-family: inherit;
}

/* ---------- 3. Accesibilidad ---------- */
.skip-link {
  position: absolute;
  left: 0;
  top: -100%;
  background: var(--azul-profundo);
  color: var(--blanco);
  padding: 0.75em 1.25em;
  z-index: 1000;
  transition: top var(--transicion);
}

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

:focus-visible {
  outline: 3px solid var(--azul-profundo);
  outline-offset: 2px;
}

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

/* ---------- 4. Utilidades de layout ---------- */
.contenedor {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.seccion {
  padding: 64px 0;
}

.seccion__titulo {
  font-size: clamp(1.6rem, 1.2rem + 1.8vw, 2.4rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  margin-bottom: 0.6em;
}

.seccion__intro {
  max-width: 68ch;
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.125rem);
}

/* ---------- 5. Botones ---------- */
.boton {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.9em 1.8em;
  border-radius: var(--radio-boton);
  font-weight: 700;
  font-size: 0.95rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform var(--transicion), box-shadow var(--transicion);
}

.boton:hover {
  transform: translateY(-1px);
}

.boton--primario {
  background: var(--verde-claro);
  color: var(--blanco);
  box-shadow: var(--sombra-suave);
}

.boton--primario:hover {
  box-shadow: 0 6px 20px rgba(140, 198, 62, 0.35);
}

.boton--secundario {
  background: transparent;
  color: var(--azul-profundo);
  border: 2px solid var(--azul-profundo);
}

.boton--secundario:hover {
  background: var(--azul-profundo);
  color: var(--blanco);
}

/* ---------- 6. Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--blanco);
  transition: box-shadow var(--transicion);
}

.header--con-sombra {
  box-shadow: var(--sombra-header);
}

.header__contenido {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
}

.header__logo img {
  height: 34px;
  width: auto;
}

/* ---------- 7. Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  background: var(--blanco);
}

.hero__formas-superior {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: auto;
  z-index: 0;
  pointer-events: none;
}

.hero__ola-inferior {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: auto;
  z-index: 0;
  pointer-events: none;
}

.hero__contenido {
  position: relative;
  z-index: 1;
  padding: 56px 0 100px;
  text-align: center;
}

.hero__eyebrow {
  display: block;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--azul-profundo);
  font-size: 0.85rem;
  margin-bottom: 0.8em;
}

.hero__titulo {
  font-size: clamp(2rem, 1.3rem + 3.5vw, 3.6rem);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin-bottom: 0.3em;
}

.hero__subtitulo {
  font-size: clamp(1.05rem, 0.95rem + 0.6vw, 1.35rem);
  font-weight: 400;
  color: var(--gris-texto);
  max-width: 46ch;
  margin: 0 auto 1.6em;
}

.hero__datos {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  margin-top: 2em;
}

.hero__dato {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-weight: 600;
  color: var(--negro);
}

.hero__dato svg {
  flex-shrink: 0;
  color: var(--azul-profundo);
}

/* ---------- 8. Flyer oficial ---------- */
.flyer-oficial {
  text-align: center;
  padding: 32px 0 8px;
}

.flyer-oficial__titulo {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--gris-texto);
  margin-bottom: 1em;
}

.flyer-oficial img {
  width: 100%;
  max-width: clamp(240px, 45vw, 380px);
  aspect-ratio: 618 / 800;
  height: auto;
  object-fit: cover;
  margin: 0 auto;
  border-radius: 12px;
  border: 1px solid var(--gris-borde);
  box-shadow: var(--sombra-suave);
}

/* ---------- 9. De qué trata ---------- */
.trata {
  background: var(--gris-fondo);
}

.trata__texto p {
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.1rem);
}

/* ---------- 10. Ponente ---------- */
.ponente__grid {
  display: grid;
  gap: 32px;
  align-items: start;
}

.ponente__retrato-wrap {
  display: flex;
  justify-content: center;
}

.ponente__retrato {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  overflow: hidden;
  border: 9px solid var(--verde-lima);
}

.ponente__retrato img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 65% 42%;
}

.ponente__nombre {
  font-size: clamp(1.4rem, 1.2rem + 0.9vw, 1.8rem);
  font-weight: 800;
  text-align: center;
  margin-top: 1em;
}

.ponente__cargo {
  text-align: center;
  font-weight: 600;
  color: var(--azul-profundo);
  margin-bottom: 1.2em;
}

.ponente__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 1.4em 0;
}

.chip {
  display: inline-block;
  padding: 0.5em 1em;
  border-radius: var(--radio-boton);
  background: var(--gris-fondo);
  border: 1px solid var(--gris-borde);
  color: var(--negro);
  font-size: 0.85rem;
  font-weight: 600;
}

/* ---------- 11. Ubicación ---------- */
.ubicacion {
  background: var(--gris-fondo);
}

.ubicacion__grid {
  display: grid;
  gap: 24px;
}

.ubicacion__info {
  display: flex;
  flex-direction: column;
  gap: 0.6em;
}

.ubicacion__mapa {
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--gris-borde);
  background: var(--blanco);
}

.ubicacion__mapa iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---------- 12. Registro + Encuesta ---------- */
.registro {
  background: linear-gradient(180deg, var(--blanco) 0%, var(--gris-fondo) 100%);
}

.formulario-card {
  max-width: 760px;
  margin: 0 auto;
  background: var(--blanco);
  border: 1px solid var(--gris-borde);
  border-radius: 16px;
  padding: clamp(24px, 4vw, 44px);
  box-shadow: var(--sombra-suave);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.form-grid--2col {
  grid-template-columns: 1fr;
}

.campo {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.campo label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--negro);
}

.campo .obligatorio {
  color: #C0392B;
}

.campo input[type="text"],
.campo input[type="email"],
.campo input[type="tel"] {
  width: 100%;
  padding: 0.75em 0.9em;
  border: 1px solid var(--gris-borde);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  color: var(--negro);
  background: var(--blanco);
  transition: border-color var(--transicion);
}

.campo input:focus {
  border-color: var(--azul-profundo);
}

.form-enviar {
  margin-top: 22px;
  width: 100%;
}

.form-enviar:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.form-mensaje-estado {
  margin: 14px 0 0;
  font-weight: 600;
  text-align: center;
  min-height: 1.2em;
}

/* ---------- 13. Footer ---------- */
.footer {
  background: var(--negro);
  color: #D9D9D9;
  padding: 48px 0 24px;
}

.footer__grid {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: flex-start;
}

.footer__logo img {
  height: 30px;
  filter: brightness(0) invert(1);
}

.footer__redes {
  display: flex;
  gap: 14px;
}

.footer__redes a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--blanco);
  transition: background var(--transicion), color var(--transicion);
}

.footer__redes a:hover {
  background: var(--verde-lima);
  color: var(--negro);
}

.footer__enlaces {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.85rem;
}

.footer__enlaces a {
  text-decoration: none;
  opacity: 0.85;
}

.footer__enlaces a:hover {
  opacity: 1;
  text-decoration: underline;
}

.footer__legal {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  margin-top: 32px;
  padding-top: 20px;
  font-size: 0.8rem;
  opacity: 0.75;
}

/* ============================================================
   BREAKPOINTS
   ============================================================ */

/* ---------- 640px: hero de fila en datos, form 2 col ---------- */
@media (min-width: 640px) {
  .hero__datos {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 28px;
  }

  .form-grid--2col {
    grid-template-columns: 1fr 1fr;
  }

  .footer__grid {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

/* ---------- 900px: ponente en 2 columnas, ubicación en 2 columnas ---------- */
@media (min-width: 900px) {
  .ponente__grid {
    grid-template-columns: 280px 1fr;
  }

  .ponente__nombre,
  .ponente__cargo {
    text-align: left;
  }

  .ubicacion__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .hero__contenido {
    padding: 80px 0 140px;
  }
}

/* ---------- 1200px: ajustes de tipografía y espaciados mayores ---------- */
@media (min-width: 1200px) {
  .seccion {
    padding: 88px 0;
  }
}