/* ============================================================
   layout.css — escena de fondo, nav, contenedores, secciones,
   grids, footer y responsive base
   ============================================================ */

/* --- Capa de escena 3D fija --- */
.scene-layer {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(120% 90% at 70% 10%, rgba(206, 164, 76, 0.18), transparent 60%),
    var(--bg);
}

.scene-layer canvas {
  width: 100%;
  height: 100%;
  display: block;
}

/* Vignette fija sobre toda la página */
.vignette {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: radial-gradient(120% 100% at 50% 40%,
      transparent 38%,
      rgba(7, 16, 37, 0.55) 78%,
      rgba(3, 9, 27, 0.92) 100%);
}

/* --- Barra de progreso de scroll --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  z-index: 100;
  background: linear-gradient(90deg, var(--green-deep), var(--green), var(--green-light));
  box-shadow: var(--glow-soft);
}

/* --- Contenedores --- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 28px;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* --- Nav --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 90;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(7, 16, 37, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--surface-line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-size: 1.18rem;
  letter-spacing: 0.01em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--green), var(--green-deep));
  color: var(--bg);
  font-size: 1.05rem;
  box-shadow: var(--glow-soft);
}

.brand-name em {
  color: var(--green);
}

.nav-links {
  display: flex;
  gap: 30px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.nav-links a {
  color: var(--cream-soft);
  transition: color var(--t-fast);
}

.nav-links a:hover {
  color: var(--green-light);
}

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

/* --- Secciones --- */
main {
  position: relative;
  z-index: 1;
}

.section {
  padding-block: clamp(72px, 11vw, 140px);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.4vw, 3.1rem);
  margin-bottom: 0.6em;
  max-width: 18ch;
}

.section-title em {
  color: var(--green);
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.26em;
  color: var(--green);
  margin-bottom: 1.1em;
}

/* --- Grids --- */
.grid {
  display: grid;
  gap: 22px;
}

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

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

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--nav-h) + 40px);
  padding-bottom: 80px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6.4vw, 5rem);
  max-width: 16ch;
  margin-bottom: 0.5em;
}

.hero-title em {
  color: var(--green);
}

.lead {
  font-size: clamp(1.02rem, 1.7vw, 1.22rem);
  color: var(--cream-soft);
  max-width: 54ch;
  margin-bottom: 2em;
}

/* --- Split sections --- */
.split-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(36px, 6vw, 80px);
  align-items: center;
}

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

.split-text p {
  color: var(--cream-soft);
  margin-bottom: 1.1em;
  max-width: 52ch;
}

/* --- Footer --- */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--surface-line);
  background: rgba(6, 12, 28, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-tagline {
  color: var(--cream-soft);
  font-size: 0.92rem;
  margin-top: 16px;
  max-width: 38ch;
}

.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--green);
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: var(--cream-soft);
  font-size: 0.92rem;
  transition: color var(--t-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 24px;
  border-top: 1px solid var(--surface-line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--cream-soft);
}

.footer-glyphs {
  letter-spacing: 0.4em;
  color: var(--green-deep);
}

/* ============================================================
   Responsive base
   ============================================================ */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .split-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .split-reverse .split-visual {
    order: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 500px) {
  .container {
    padding-inline: 20px;
  }

  .grid-2,
  .grid-3 {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 10px;
    text-align: center;
  }
}