/* ==========================================================================
   Athena AI — layout.css
   Estructura de pagina: contenedor, header, secciones, footer, grillas.
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 24px;
}

/* --- Header / navegacion ------------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--color-border);
}

/* El blur vive en un pseudo-elemento: si se aplicara backdrop-filter
   directamente en .site-header, este se convertiria en el "containing
   block" de sus descendientes position:fixed (el menu movil), rompiendo
   su posicionamiento respecto al viewport. */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(10px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  box-shadow: var(--shadow-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.icon-btn.nav-toggle {
  display: none;
}

/* --- Hero ----------------------------------------------------------------*/
.hero {
  position: relative;
  overflow: hidden;
  padding-block: 96px 80px;
  background-image: var(--gradient-hero);
}

.hero-inner {
  display: grid;
  gap: 28px;
  max-width: 760px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  background: var(--color-bg-muted);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-accent) 25%, transparent);
}

.hero p.lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 620px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 6px;
}

.hero-secondary-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
  color: var(--color-text-subtle);
  font-size: 0.92rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, auto);
  gap: 36px;
  margin-top: 28px;
}

.hero-stat strong {
  display: block;
  font-size: 1.5rem;
  color: var(--color-text);
}

.hero-stat span {
  font-size: 0.85rem;
  color: var(--color-text-subtle);
}

.hero-panel {
  margin-top: 56px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero-panel-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: var(--color-bg-muted);
  border-bottom: 1px solid var(--color-border);
}

.hero-panel-bar span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--color-border);
}

.hero-panel-body {
  padding: 22px 24px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--color-text-muted);
  overflow-x: auto;
}

.hero-panel-body .line {
  white-space: pre;
}

.hero-panel-body .accent {
  color: var(--color-accent);
}

.hero-panel-body .primary {
  color: var(--color-primary);
}

/* --- Secciones genericas -------------------------------------------------*/
section {
  padding-block: 88px;
}

.section-head {
  max-width: 640px;
  margin-inline: auto;
  text-align: center;
  display: grid;
  gap: 14px;
  margin-bottom: 56px;
}

.section-head p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* --- Grillas de features ---------------------------------------------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.engines-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: step;
}

.api-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

/* --- Bandas de fondo alterno -------------------------------------------- */
.section-muted {
  background: var(--color-bg-muted);
  border-block: 1px solid var(--color-border);
}

/* --- CTA final ------------------------------------------------------------*/
.cta-section {
  padding-block: 96px;
}

.cta-card {
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  display: grid;
  gap: 22px;
  justify-items: center;
  box-shadow: var(--shadow-lg);
}

.cta-card p {
  color: rgba(255, 255, 255, 0.86);
  max-width: 520px;
  font-size: 1.05rem;
}

.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

/* --- Footer ---------------------------------------------------------------*/
.site-footer {
  border-top: 1px solid var(--color-border);
  padding-block: 56px 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
  padding-bottom: 40px;
}

.footer-col h4 {
  font-size: 0.88rem;
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.footer-col ul {
  display: grid;
  gap: 10px;
}

.footer-col a {
  color: var(--color-text-muted);
  font-size: 0.94rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-subtle);
  font-size: 0.85rem;
  flex-wrap: wrap;
}

/* --- Paginas de autenticacion (login / registro) -------------------------*/
.auth-shell {
  min-height: calc(100vh - 73px);
  display: grid;
  place-items: center;
  padding: 48px 24px;
  background-image: var(--gradient-hero);
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 40px 36px;
  display: grid;
  gap: 24px;
}

.auth-card-head {
  display: grid;
  gap: 8px;
  text-align: center;
}

.auth-card-head p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.auth-form {
  display: grid;
  gap: 18px;
}

.auth-footer-note {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* --- Responsive ------------------------------------------------------------*/
@media (max-width: 900px) {
  .features-grid,
  .engines-grid,
  .steps-grid,
  .api-grid {
    grid-template-columns: 1fr;
  }

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

  .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    inset: 73px 0 0 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 28px 24px;
    gap: 22px;
    border-top: 1px solid var(--color-border);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  }

  .nav-links[data-open="true"] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .icon-btn.nav-toggle {
    display: inline-flex;
  }

  .nav-actions .btn.btn-secondary {
    display: none;
  }

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

  .cta-card {
    padding: 48px 24px;
  }
}