:root {
  --nexa-primary: #2563EB;
  --nexa-accent: #F97316;
  --nexa-dark: #0F172A;
  --nexa-light: #F8FAFC;
  --nexa-muted: #64748B;
  --nexa-border: #E2E8F0;
}

*,
*::before,
*::after { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  color: var(--nexa-dark);
  background: var(--nexa-light);
}

.container { width: min(1100px, calc(100% - 2rem)); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 40; background: rgba(248, 250, 252, 0.94); border-bottom: 1px solid var(--nexa-border); }
.site-header__inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.site-logo { font-weight: 800; color: var(--nexa-dark); text-decoration: none; letter-spacing: 0.06em; }
.site-nav__list { list-style: none; display: flex; gap: 0.8rem; margin: 0; padding: 0; }
.site-nav__link { text-decoration: none; color: var(--nexa-muted); font-size: 0.92rem; }
.site-nav__link.is-active, .site-nav__link:hover { color: var(--nexa-primary); }
.btn { display: inline-flex; align-items: center; justify-content: center; border-radius: 999px; text-decoration: none; font-weight: 700; }
.btn--primary { padding: 0.62rem 1rem; color: #fff; background: var(--nexa-primary); border: 1px solid var(--nexa-primary); }
.btn--secondary { padding: 0.62rem 1rem; color: var(--nexa-dark); background: #fff; border: 1px solid var(--nexa-border); }

.section, .content-block { padding: 3.5rem 0; }
.page-hero { padding: 3rem 0 2rem; }
.page-hero__title { margin: 0 0 0.7rem; font-size: clamp(1.9rem, 4vw, 2.8rem); line-height: 1.15; }
.page-hero__lead { margin: 0; color: var(--nexa-muted); max-width: 62ch; }
.section__eyebrow { margin: 0 0 0.5rem; text-transform: uppercase; letter-spacing: 0.12em; font-size: 0.75rem; color: var(--nexa-primary); font-weight: 700; }
.section__title { margin: 0 0 0.7rem; font-size: clamp(1.6rem, 3vw, 2.1rem); }
.section__lead { margin: 0; color: var(--nexa-muted); }
.section__head { margin-bottom: 1.4rem; }
.section__head--center { text-align: center; }

.solutions-grid, .modules, .benefit-grid, .faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

.solution-card, .module-card, .benefit-card, .faq-card, .pricing-card, .use-case-card {
  background: #fff;
  border: 1px solid var(--nexa-border);
  border-radius: 14px;
  padding: 1rem;
}

.list-check { display: grid; gap: 0.5rem; padding-left: 1rem; }
.section-cta { margin-top: 1rem; }

.site-footer { border-top: 1px solid var(--nexa-border); padding: 1.25rem 0; background: #fff; }
.site-footer__inner { display: flex; justify-content: space-between; gap: 1rem; align-items: center; flex-wrap: wrap; }
.site-footer a { margin-right: 0.75rem; color: var(--nexa-muted); text-decoration: none; }
.site-footer a:hover { color: var(--nexa-primary); }

.floating-whatsapp {
  position: fixed; right: 1rem; bottom: 1rem; z-index: 80; background: #10B981; color: #fff;
  border-radius: 999px; padding: 0.62rem 0.9rem; text-decoration: none; font-weight: 700; font-size: 0.85rem;
}

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus { left: 1rem; top: 1rem; background: var(--nexa-dark); color: #fff; padding: 0.5rem; }

@media (max-width: 860px) {
  .site-header__inner { flex-wrap: wrap; padding: 0.6rem 0; }
  .site-nav__list { flex-wrap: wrap; }
}