/* ==========================================================================
   Layout — escena, nav, contenedor, secciones, hero, footer y responsive
   ========================================================================== */

/* ---------- Escena 3D, velo y viñeta ---------- */

.scene {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
}

/* Oscurece la carretera a medida que el contenido toma protagonismo. */
.scene-veil {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: var(--night);
  opacity: calc(var(--scene-dim) * 0.7);
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: var(--vignette);
}

main,
.footer {
  position: relative;
  z-index: 3;
}

/* Sin WebGL: un degradado nocturno en lugar de la escena. */
.no-webgl .scene {
  background:
    radial-gradient(ellipse 80% 50% at 50% 100%, var(--night-3), transparent 70%),
    var(--night);
}

/* ---------- Barra de progreso ---------- */

.progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 60;
  height: 2px;
  background: var(--line);
}

.progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--blue), var(--blue-light) 70%, var(--wine-light));
  box-shadow: 0 0 12px var(--blue-glow);
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: var(--cream);
  color: var(--night);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--track-mono);
  text-transform: uppercase;
  border-radius: var(--radius);
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

/* ---------- Contenedor ---------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Navegación ---------- */

.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: var(--nav-h);
  border-bottom: 1px solid transparent;
}

.nav.is-scrolled {
  background: var(--surface);
  border-bottom-color: var(--line);
  -webkit-backdrop-filter: blur(16px) saturate(130%);
  backdrop-filter: blur(16px) saturate(130%);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  height: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex-shrink: 0;
}

.brand__mark {
  width: 64px;
  height: auto;
  filter: var(--mark-filter);
}

.brand__word {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand__name {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  font-style: italic;
  letter-spacing: 0.01em;
}

.brand__sub {
  margin-top: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--wine-light);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 2.25rem;
  margin-left: auto;
}

.nav__links {
  display: flex;
  gap: 1.9rem;
}

.nav__links a {
  position: relative;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--track-mono);
  text-transform: uppercase;
  color: var(--cream-dim);
  padding-block: 0.4rem;
}

.nav__toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.nav__toggle-line {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 1px;
  background: var(--cream);
}

.nav__toggle-line:first-of-type { top: 18px; }
.nav__toggle-line:last-of-type  { top: 25px; }

/* ---------- Secciones ---------- */

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

.section__head {
  max-width: 760px;
  margin-bottom: clamp(3rem, 2rem + 4vw, 5.5rem);
}

.section__head--split {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  align-items: end;
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  max-width: none;
}

.section__head--center {
  margin-inline: auto;
  text-align: center;
}

.section__head--center .kicker {
  justify-content: center;
}

.section__title {
  font-size: var(--fs-h2);
  margin-top: 1.4rem;
}

.section__lead {
  margin-top: 1.6rem;
  max-width: 54ch;
  font-size: var(--fs-lead);
  line-height: 1.6;
  color: var(--cream-dim);
}

.section__head--split .section__lead {
  margin-top: 0;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100vh;
  min-height: 100svh;
  padding-top: calc(var(--nav-h) + 3rem);
  padding-bottom: 7rem;
}

.hero__inner {
  position: relative;
}

.hero__title {
  max-width: 13ch;
  margin-top: 1.8rem;
  font-size: var(--fs-display);
  font-weight: 500;
  line-height: 0.98;
  letter-spacing: -0.025em;
  text-shadow: var(--text-shadow);
}

.hero__lead {
  max-width: 50ch;
  margin-top: 2rem;
  font-size: var(--fs-lead);
  color: var(--cream-dim);
  text-shadow: var(--text-shadow);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.6rem;
}

.hero__stats {
  margin-top: clamp(3rem, 2rem + 4vw, 5rem);
}

/* ---------- Bandas intermedias ---------- */

.clients {
  padding-block: clamp(3rem, 2rem + 3vw, 5rem);
  border-block: 1px solid var(--line);
  background: var(--surface);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.manifesto__inner {
  max-width: 1040px;
}

.quote__inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2.5rem, 1rem + 5vw, 6rem);
  align-items: start;
}

.quote__intro {
  position: sticky;
  top: calc(var(--nav-h) + 2rem);
}

.faq__inner {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: start;
}

.faq__inner .section__head {
  margin-bottom: 0;
}

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 3rem;
  padding-block: 5rem 4rem;
}

.footer__logo {
  width: 200px;
  height: auto;
}

/* Cada tema muestra la versión del logotipo que contrasta con su fondo */
.footer__logo--light,
:root[data-theme='light'] .footer__logo--dark {
  display: none;
}

:root[data-theme='light'] .footer__logo--light {
  display: block;
}

.footer__tagline {
  margin-top: 1.5rem;
  color: var(--cream-faint);
  font-size: 0.92rem;
}

.footer__label {
  margin-bottom: 1.2rem;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  color: var(--blue-light);
}

.footer__list {
  display: grid;
  gap: 0.65rem;
  font-size: 0.92rem;
  color: var(--cream-dim);
  overflow-wrap: anywhere;
}

.footer__legal {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1.75rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cream-faint);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1080px) {
  .footer__inner {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 960px) {
  .nav__toggle {
    display: block;
  }

  /* El menú sale del flujo: el botón de tema se va a la derecha */
  .theme-toggle {
    margin-left: auto;
  }

  .nav__menu {
    position: fixed;
    inset: var(--nav-h) 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
    padding: 2rem var(--gutter) 2.5rem;
    background: var(--surface-solid);
    border-bottom: 1px solid var(--line);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
  }

  .nav.is-open {
    background: var(--surface-solid);
  }

  .nav.is-open .nav__menu {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav__links {
    flex-direction: column;
    gap: 0;
  }

  .nav__links a {
    display: block;
    padding-block: 0.95rem;
    border-bottom: 1px solid var(--line);
    font-size: 0.8rem;
  }

  .nav__cta {
    align-self: flex-start;
  }

  .section__head--split,
  .quote__inner,
  .faq__inner {
    grid-template-columns: 1fr;
  }

  .quote__intro {
    position: static;
  }
}

@media (max-width: 640px) {
  :root {
    --nav-h: 64px;
  }

  .brand__mark {
    width: 52px;
  }

  /* El camión ocupa la franja superior; el texto entra debajo. */
  .hero {
    align-items: flex-end;
    padding-top: calc(var(--nav-h) + 34vh);
    padding-bottom: 6rem;
  }

  .hero__title br {
    display: none;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    padding-block: 4rem 3rem;
  }

  .footer__legal {
    flex-direction: column;
  }
}