/* ============================================================
   STAYFRAME — layout.css
   Nav, secciones, container, grid, footer, responsive base
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
  position: relative;
  z-index: 2;
}

/* ---------- Fondo fijo (3D o degradado) ---------- */

#scene-root {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: var(--white);
}

#scene-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.scene-fallback {
  position: absolute;
  inset: 0;
  display: none;
  background:
    radial-gradient(60% 50% at 20% 15%, rgba(255, 90, 95, 0.10), transparent 70%),
    radial-gradient(55% 45% at 85% 80%, rgba(201, 162, 75, 0.12), transparent 70%),
    linear-gradient(160deg, #ffffff 0%, #fff7f4 45%, #fdf3ee 100%);
  background-size: 200% 200%;
  animation: warmDrift 22s ease-in-out infinite;
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    ellipse at center,
    rgba(255, 255, 255, 0) 45%,
    rgba(255, 255, 255, 0.55) 82%,
    rgba(255, 255, 255, 0.96) 100%
  );
}

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

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: var(--rausch);
  z-index: 100;
  transition: width 0.08s linear;
}

/* ---------- Nav ---------- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 4vw, 2.5rem);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--surface-border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.nav-logo {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: var(--rausch);
  border-radius: var(--radius-md);
  font-size: 1.05rem;
}

.nav-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--pig-iron);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.1rem;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--pig-iron-light);
  transition: color var(--dur-fast) var(--ease-cine);
}

.nav-link:hover {
  color: var(--rausch);
}

.nav-cta {
  display: none;
}

@media (min-width: 901px) {
  .nav-cta {
    display: inline-flex;
  }
}

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

section {
  position: relative;
  z-index: 2;
  padding-block: var(--section-pad-y);
}

.section-head {
  max-width: 640px;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-head.centered {
  max-width: 620px;
  margin-inline: auto;
  text-align: center;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--rausch);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.9rem, 3.4vw, 2.75rem);
  color: var(--pig-iron);
}

.section-lead {
  margin-top: 1rem;
  color: var(--pig-iron-light);
  font-size: 1.05rem;
  max-width: 52ch;
}

.section-head.centered .section-lead {
  margin-inline: auto;
}

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

.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: 6rem;
}

.hero-inner {
  max-width: 760px;
}

.hero-title {
  font-size: clamp(2.6rem, 6.2vw, 5rem);
  color: var(--pig-iron);
  margin-top: 1.25rem;
}

.hero-lead {
  margin-top: 1.5rem;
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: var(--pig-iron-light);
  max-width: 46ch;
}

.hero-actions {
  margin-top: 2.25rem;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.hero-meta {
  margin-top: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--pig-iron-light);
}

.hero-stats {
  margin-top: clamp(3rem, 6vw, 5rem);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  max-width: 900px;
}

.scroll-hint {
  position: absolute;
  bottom: 2.25rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--pig-iron-light);
}

/* ---------- Grids compartidos ---------- */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem;
}

/* ---------- Split (texto + visual) ---------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: center;
}

.split-reverse .split-visual {
  order: 2;
}

.split-reverse .split-text {
  order: 1;
}

.split-visual {
  position: relative;
  aspect-ratio: 4 / 3;
}

/* ---------- Proceso ---------- */

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.75rem;
}

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

.footer {
  position: relative;
  z-index: 2;
  padding-top: clamp(3.5rem, 7vw, 5.5rem);
  border-top: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
}

.footer-brand-name {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--pig-iron);
}

.footer-brand-desc {
  margin-top: 0.85rem;
  color: var(--pig-iron-light);
  font-size: 0.92rem;
  max-width: 32ch;
}

.footer-col-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--pig-iron);
  margin-bottom: 1.1rem;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
}

.footer-col a {
  font-size: 0.92rem;
  color: var(--pig-iron-light);
  transition: color var(--dur-fast) var(--ease-cine);
}

.footer-col a:hover {
  color: var(--rausch);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.5rem;
  border-top: 1px solid var(--surface-border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--pig-iron-light);
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

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

  .grid-3 {
    grid-template-columns: 1fr;
  }

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

  .split,
  .split-reverse {
    grid-template-columns: 1fr;
  }

  .split-reverse .split-visual,
  .split-reverse .split-text {
    order: initial;
  }

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    row-gap: 2.25rem;
  }
}

@media (max-width: 500px) {
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .process-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }
}