/* =========================================================
   Herencia Hispana — styles.css
   Vanilla CSS3: variables, Grid, Flexbox, animaciones nativas
   Estética: editorial académico de alta gama
   ========================================================= */

/* ---------- Variables globales ---------- */
:root {
  /* Paleta — tomada del logo (crest heráldico) */
  --primary:      #6E1423;   /* Borgoña del escudo */
  --primary-deep: #4A0F1A;   /* Borgoña profundo (sombras) */
  --accent:       #C5A059;   /* Oro viejo */
  --accent-deep:  #96682E;   /* Oro bruñido */
  --gold-hi:      #E8D4A2;   /* Oro claro (brillos, filetes) */
  --bg:           #F8F6F0;   /* Blanco hueso (globo del logo) */
  --text:         #1E2022;   /* Gris pizarra */

  /* Derivados de la paleta */
  --surface: #ffffff;
  --surface-alt: #F1ECE0;
  --border: rgba(30, 32, 34, 0.12);
  --muted: rgba(30, 32, 34, 0.66);
  --shadow: 0 10px 30px rgba(30, 32, 34, 0.10);
  --shadow-lg: 0 20px 50px rgba(30, 32, 34, 0.16);
  --rule: linear-gradient(90deg, transparent, var(--accent-deep), var(--accent), var(--accent-deep), transparent);

  /* Tipografía — clásica: capital romana grabada + garamonda */
  --font-title: 'Cinzel', 'Trajan Pro', Georgia, 'Times New Roman', serif;
  --font-body: 'EB Garamond', Georgia, 'Times New Roman', serif;

  /* Layout */
  --maxw: 1120px;
  --radius: 14px;
  --transition: all 0.3s ease;
}

/* ---------- Tema oscuro ---------- */
[data-theme="dark"] {
  --primary:      #D98BA0;
  --primary-deep: #B06578;
  --accent:       #D9B978;
  --accent-deep:  #B78E4A;
  --gold-hi:      #F0DFB4;
  --bg:           #16130F;
  --text:         #EDE9E0;

  --surface: #211C17;
  --surface-alt: #1C1813;
  --border: rgba(237, 233, 224, 0.14);
  --muted: rgba(237, 233, 224, 0.66);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.55);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 104px; /* compensa el header fijo al saltar con anclas */
}

body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--bg);
  font-size: 1.075rem;   /* EB Garamond corre pequeña: se compensa */
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

h1, h2, h3 {
  font-family: var(--font-title);
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.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;
}

/* ---------- Contenedores ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}
.container--narrow { max-width: 680px; }

/* ---------- Botones ---------- */
.btn {
  display: inline-block;
  padding: 14px 30px;
  border-radius: 2px;               /* esquina recta: sello editorial */
  font-family: var(--font-title);
  font-weight: 500;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
}
.btn--primary {
  background: var(--primary);
  color: #fff;
}
[data-theme="dark"] .btn--primary { color: var(--bg); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.btn--ghost {
  background: transparent;
  color: var(--text);
  border-color: var(--border);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--primary); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 84px;
}

.logo { display: flex; align-items: center; gap: 12px; }
.logo__img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  flex-shrink: 0;
}
.logo__text {
  font-family: var(--font-title);
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
}

.nav { display: flex; align-items: center; }
.nav__menu { display: flex; gap: 30px; }
.nav__menu a {
  font-family: var(--font-title);
  font-size: 0.76rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--muted);
  padding: 6px 0;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.nav__menu a:hover { color: var(--primary); border-color: var(--accent); }

.nav__toggle {
  display: none;
  width: 42px; height: 42px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  position: relative;
}
.nav__toggle-bar,
.nav__toggle-bar::before,
.nav__toggle-bar::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 18px; height: 2px;
  background: var(--text);
  transform: translate(-50%, -50%);
  transition: var(--transition);
}
.nav__toggle-bar::before { transform: translate(-50%, -8px); }
.nav__toggle-bar::after  { transform: translate(-50%, 6px); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 9px 16px;
  font-family: var(--font-title);
  font-size: 0.72rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
}
.theme-toggle:hover { border-color: var(--accent); transform: translateY(-1px); }
.theme-toggle__icon { font-size: 1rem; color: var(--accent); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(64px, 12vw, 140px) 0 clamp(56px, 10vw, 120px);
  background:
    radial-gradient(1200px 500px at 80% -10%, color-mix(in srgb, var(--accent) 22%, transparent), transparent),
    var(--bg);
  border-bottom: 1px solid var(--border);
}
/* Marca de agua: el propio escudo del logo */
.hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: 50%;
  transform: translateY(-50%);
  width: min(620px, 60vw);
  height: min(620px, 60vw);
  background: url("logo-herencia-hispana-co.png") right center / contain no-repeat;
  opacity: 0.07;
  pointer-events: none;
}
[data-theme="dark"] .hero::after { opacity: 0.09; }
.hero__inner { position: relative; z-index: 1; max-width: 820px; }
.hero__eyebrow {
  font-family: var(--font-title);
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 0.74rem;
  font-weight: 400;
  color: var(--accent-deep);
  margin-bottom: 22px;
}
.hero__title {
  font-size: clamp(2rem, 5vw, 3.6rem);
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 24px;
}
.hero__subtitle {
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
  font-style: italic;
  color: var(--muted);
  max-width: 58ch;
  margin-bottom: 36px;
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 16px; }

/* ---------- Secciones ---------- */
.section { padding: clamp(56px, 9vw, 110px) 0; }
.section--alt { background: var(--surface-alt); }
.section__head { max-width: 640px; margin-bottom: 48px; }
.section__title {
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.section__title::after {
  content: "";
  display: block;
  width: 72px;
  height: 2px;
  margin-top: 16px;
  background: var(--rule);
}
.section__lead { color: var(--muted); font-size: 1.15rem; font-style: italic; }

/* ---------- Mitos vs. Fuentes (tarjetas con giro 3D) ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.card {
  perspective: 1400px;
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
  font: inherit;
  color: inherit;
  text-align: left;
  min-height: 300px;
}
.card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 300px;
  transition: transform 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
  transform-style: preserve-3d;
}
.card.is-flipped .card__inner { transform: rotateY(180deg); }

.card__face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius);
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: box-shadow 0.3s ease;
}
.card:hover .card__face { box-shadow: var(--shadow-lg); }

.card__face--back {
  transform: rotateY(180deg);
  background: var(--primary);
  color: #fff;
  border-color: transparent;
}
[data-theme="dark"] .card__face--back { color: var(--bg); }

.card__tag {
  align-self: flex-start;
  font-family: var(--font-title);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.64rem;
  font-weight: 400;
  padding: 5px 10px;
  border-radius: 2px;
  border: 1px solid currentColor;
  opacity: 0.85;
}
.card__face--front .card__tag { color: var(--accent-deep); }
.card__title { font-size: 1.35rem; font-weight: 600; letter-spacing: 0.03em; }
.card__text { font-size: 0.98rem; color: var(--muted); }
.card__face--back .card__text { color: rgba(255, 255, 255, 0.88); }
[data-theme="dark"] .card__face--back .card__text { color: rgba(0, 0, 0, 0.72); }
.card__source {
  margin-top: auto;
  font-size: 0.82rem;
  font-style: italic;
  opacity: 0.9;
}
.card__hint {
  margin-top: auto;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
}

/* ---------- Línea de tiempo ---------- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 42px;
}
.filter {
  padding: 9px 18px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  font-family: var(--font-title);
  font-size: 0.72rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.11em;
  cursor: pointer;
  transition: var(--transition);
}
.filter:hover { border-color: var(--accent); color: var(--text); }
.filter.is-active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
[data-theme="dark"] .filter.is-active { color: var(--bg); }

.timeline {
  position: relative;
  padding-left: 34px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 9px; top: 6px; bottom: 6px;
  width: 2px;
  background: var(--border);
}
.timeline__item {
  position: relative;
  padding: 0 0 34px 8px;
  transition: opacity 0.35s ease, transform 0.35s ease;
}
.timeline__item::before {
  content: "";
  position: absolute;
  left: -34px; top: 7px;
  width: 12px; height: 12px;
  transform: rotate(45deg);            /* rombo: eco del motivo ·H· del logo */
  background: var(--bg);
  border: 2px solid var(--accent-deep);
}
.timeline__item.is-hidden {
  opacity: 0;
  transform: translateY(-6px);
  height: 0;
  padding: 0;
  overflow: hidden;
  pointer-events: none;
}
.timeline__year {
  font-family: var(--font-title);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--primary);
}
.timeline__cat {
  display: inline-block;
  margin-left: 12px;
  font-family: var(--font-title);
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 400;
  color: var(--accent-deep);
}
.timeline__title { font-size: 1.05rem; letter-spacing: 0.03em; margin: 6px 0 8px; }
.timeline__desc { color: var(--muted); font-size: 1.05rem; max-width: 62ch; }

/* ---------- Manifiesto ---------- */
.manifesto { max-width: 70ch; }
.manifesto .section__title { margin-bottom: 28px; }
.manifesto p { margin-bottom: 20px; font-size: 1.18rem; }
.manifesto p:first-of-type::first-letter {
  font-family: var(--font-title);
  float: left;
  font-size: 3.6em;
  line-height: 0.82;
  padding: 8px 12px 0 0;
  color: var(--primary);
}
.manifesto__sign {
  font-family: var(--font-title);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- Formulario ---------- */
.form { display: grid; gap: 22px; }
.field { display: grid; gap: 7px; }
.field label {
  font-family: var(--font-title);
  font-weight: 400;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.field input[type="text"],
.field input[type="email"] {
  padding: 13px 15px;
  border-radius: 2px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 1.05rem;
  transition: var(--transition);
}
.field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 30%, transparent);
}
.field--check {
  grid-auto-flow: column;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 10px;
}
.field--check label {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  text-transform: none;
  letter-spacing: 0;
  color: var(--muted);
}
.field--check input { margin-top: 5px; }
.field--check .field__error { grid-column: 1 / -1; }

.field.has-error input { border-color: #b4432f; }
.field__error {
  min-height: 1em;
  font-size: 0.82rem;
  color: #b4432f;
  font-weight: 500;
}
[data-theme="dark"] .field__error,
[data-theme="dark"] .field.has-error input { color: #e8927f; border-color: #e8927f; }

.form__status {
  font-weight: 600;
  color: var(--primary);
  min-height: 1.4em;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 48px 0;
}
.site-footer__inner { display: grid; gap: 10px; }
.logo--footer { color: var(--text); align-items: center; font-family: var(--font-title); text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.9rem; }
.logo--footer .logo__img { width: 44px; height: 44px; }
.site-footer__note { color: var(--muted); font-size: 0.92rem; max-width: 50ch; }
.site-footer__year { color: var(--muted); font-size: 0.85rem; }

/* ---------- Animación de entrada (revelar al hacer scroll) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- Responsivo ---------- */
@media (max-width: 760px) {
  .nav__toggle { display: block; }
  .nav__menu {
    position: absolute;
    top: 84px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 8px 24px 16px;
    display: none;
  }
  .nav__menu.is-open { display: flex; }
  .nav__menu a { padding: 12px 0; border-bottom: 1px solid var(--border); }
  .theme-toggle__label { display: none; }
}

@media (max-width: 420px) {
  .logo__text { display: none; }
  .hero__subtitle { font-size: 1.1rem; }
}