/* ============================================
   Global Layout: navbar, containers, footer
   ============================================ */

/* --- Container --- */
.container {
  width: min(1200px, 92%);
  margin: 0 auto;
}

/* --- Navigation --- */
.site-nav {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 3rem);
  max-width: 1200px;
  z-index: 100;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  backdrop-filter: blur(24px);
  background: rgba(3, 7, 18, 0.75);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.nav-logo {
  font-family: 'Manrope', sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.04em;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text-primary);
}

.nav-logo-icon {
  width: 30px;
  height: 30px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  color: white;
  box-shadow: var(--shadow-glow);
}

.nav-links {
  display: flex;
  gap: 1.8rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  transition: color 0.3s;
}

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

.nav-cta {
  background: var(--accent-gradient);
  color: white !important;
  padding: 0.5rem 1.3rem;
  border-radius: 10px;
  font-weight: 700;
  transition: all 0.3s;
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.2);
}

.nav-cta:hover {
  box-shadow: 0 0 30px rgba(99, 102, 241, 0.4);
  transform: translateY(-1px);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
}

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 2.5rem 0;
  color: var(--text-muted);
  background: var(--bg-deep);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-inner p {
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color 0.3s;
}

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

/* --- Section wrappers --- */
.section-dark {
  background: var(--bg-deep);
  padding: 6rem 2rem;
  position: relative;
}

.section-light {
  background: var(--bg-light);
  padding: 6rem 2rem;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header .section-desc {
  margin: 0 auto;
}

/* --- Grids --- */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 0.5rem);
    left: 0;
    right: 0;
    background: rgba(3, 7, 18, 0.95);
    backdrop-filter: blur(24px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    flex-direction: column;
    gap: 1rem;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-cta {
    text-align: center;
    display: block;
    padding: 0.7rem 1.3rem;
  }

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

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

  .section-dark,
  .section-light {
    padding: 4rem 1.5rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }
}