/* ==========================================================================
   GMA Company — components.css
   Piezas reutilizables: encabezado, navegación, botones, etiquetas,
   títulos de sección, animaciones de aparición y botón "volver arriba".
   ========================================================================== */

/* ---------- Encabezado ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  /* Fondo sólido: backdrop-filter rompería el menú móvil (position: fixed) */
  background: var(--color-white);
  transition: box-shadow .3s var(--ease), background-color .3s var(--ease);
}

.site-header.is-scrolled {
  box-shadow: 0 6px 24px -12px rgba(17, 19, 20, .25);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-h);
  transition: min-height .3s var(--ease);
}

.site-header.is-scrolled .site-header__inner { min-height: 64px; }

.site-header__logo img {
  width: clamp(170px, 14vw + 90px, 250px);
  transition: width .3s var(--ease);
}

.site-header.is-scrolled .site-header__logo img { width: clamp(150px, 12vw + 80px, 210px); }

/* ---------- Navegación ---------- */
.site-nav__list {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 2.5vw, 2.75rem);
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: .5rem 0;
  font-size: .95rem;
  font-weight: 500;
  color: var(--color-ink);
  transition: color .2s var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: .2rem;
  width: 100%;
  height: 2px;
  background: var(--color-red);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .3s var(--ease);
}

.site-nav__link:hover,
.site-nav__link.is-active { color: var(--color-red); }

.site-nav__link:hover::after,
.site-nav__link.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

/* Botón hamburguesa (solo móvil) */
.nav-toggle {
  display: none;
  position: relative;
  z-index: 120;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle__bar {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-ink);
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }

  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 110;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-white);
    opacity: 0;
    visibility: hidden;
    transition: opacity .35s var(--ease), visibility .35s var(--ease);
  }

  .site-nav.is-open { opacity: 1; visibility: visible; }

  .site-nav__list {
    flex-direction: column;
    gap: 1.25rem;
    text-align: center;
  }

  .site-nav__link {
    font-size: 1.75rem;
    font-weight: 600;
    opacity: 0;
    transform: translateY(14px);
    transition: opacity .4s var(--ease), transform .4s var(--ease), color .2s var(--ease);
  }

  .site-nav.is-open .site-nav__link { opacity: 1; transform: none; }
  .site-nav.is-open li:nth-child(2) .site-nav__link { transition-delay: .05s; }
  .site-nav.is-open li:nth-child(3) .site-nav__link { transition-delay: .1s; }
  .site-nav.is-open li:nth-child(4) .site-nav__link { transition-delay: .15s; }
}

/* ---------- Botones ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  min-height: 48px;
  padding: .85rem 1.75rem;
  border-radius: var(--radius-pill);
  font-size: .95rem;
  font-weight: 600;
  line-height: 1;
  overflow: hidden;
  isolation: isolate;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background-color .25s var(--ease), color .25s var(--ease);
}

/* Brillo que recorre el botón al pasar el cursor */
.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, .35) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform .7s var(--ease);
}

.btn:hover::before { transform: translateX(120%); }
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--color-red);
  color: var(--color-white);
  box-shadow: 0 10px 24px -10px rgba(200, 18, 20, .65);
}
.btn--primary:hover { background: var(--color-red-dark); box-shadow: 0 16px 32px -12px rgba(200, 18, 20, .75); }

.btn--light {
  background: var(--color-white);
  color: var(--color-ink);
  min-height: 44px;
  padding: .75rem 1.5rem;
  font-size: .875rem;
}
.btn--light::before { background: linear-gradient(110deg, transparent 30%, rgba(200, 18, 20, .12) 50%, transparent 70%); }
.btn--light:hover { box-shadow: 0 14px 30px -14px rgba(0, 0, 0, .6); }

/* ---------- Etiquetas y títulos ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .14);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  color: var(--color-white);
  font-size: var(--fs-xs);
  font-weight: 600;
}

.eyebrow {
  margin-bottom: 1rem;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--color-red);
}

.eyebrow--light { color: var(--color-white); }

.section-title {
  font-size: var(--fs-h2);
  color: var(--color-ink);
}

.section-title--light { color: var(--color-white); }

.section-head { margin-bottom: clamp(2rem, 1.5rem + 2vw, 3.5rem); }

.section-head--split {
  display: grid;
  gap: 1.25rem;
  align-items: end;
}

.section-head__aside { max-width: 30rem; font-size: var(--fs-sm); }

@media (min-width: 900px) {
  .section-head--split { grid-template-columns: 1fr minmax(0, 30rem); gap: 4rem; }
  .section-head--split .section-title { max-width: 16ch; }
}

/* ---------- Animaciones de aparición (activadas por JS) ----------
   Solo se ocultan los elementos si el navegador tiene JavaScript activo,
   así el contenido nunca queda invisible para usuarios sin JS o buscadores. */
@media (scripting: enabled) and (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .8s var(--ease), transform .8s var(--ease), box-shadow .4s var(--ease);
    transition-delay: var(--reveal-delay, 0s);
  }

  [data-reveal="right"] { transform: translateX(40px); }

  [data-reveal].is-visible { opacity: 1; transform: none; }
}

/* Entrada del hero (CSS puro, sin esperar a JS para no afectar el LCP) */
@media (prefers-reduced-motion: no-preference) {
  .hero-anim {
    animation: fade-up .9s var(--ease) both;
    animation-delay: calc(var(--i, 0) * 120ms + 150ms);
  }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- Botón volver arriba ---------- */
.to-top {
  position: fixed;
  right: clamp(1rem, 2vw, 1.75rem);
  bottom: clamp(1rem, 2vw, 1.75rem);
  z-index: 90;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-red);
  color: var(--color-white);
  box-shadow: 0 10px 24px -8px rgba(200, 18, 20, .6);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s var(--ease), background-color .2s var(--ease);
}

.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { background: var(--color-red-dark); }

.to-top svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.hero-anim--1 { --i: 0; }
.hero-anim--2 { --i: 1; }
.hero-anim--3 { --i: 2; }
.hero-anim--4 { --i: 3; }
.hero-anim--5 { --i: 4; }