:root {
  --azul: #2563eb;
  --azul-escuro: #1e3a8a;
  --tinta: #0f172a;
  --cinza: #475569;
  --borda: #e2e8f0;
  --fundo-alt: #f8fafc;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--tinta);
  line-height: 1.6;
  background: #fff;
}

.container {
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--borda);
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  z-index: 10;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}
.logo span { color: var(--azul); }
nav a {
  color: var(--cinza);
  text-decoration: none;
  margin-left: 24px;
  font-size: 0.95rem;
}
nav a:hover { color: var(--azul); }

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--fundo-alt), #fff);
  padding: 80px 0;
  border-bottom: 1px solid var(--borda);
}
.hero h1 {
  font-size: 2.4rem;
  line-height: 1.2;
  letter-spacing: -0.03em;
  max-width: 18ch;
}
.lead {
  margin-top: 20px;
  font-size: 1.15rem;
  color: var(--cinza);
  max-width: 60ch;
}

/* Sections */
.section { padding: 64px 0; }
.section-alt {
  background: var(--fundo-alt);
  border-top: 1px solid var(--borda);
  border-bottom: 1px solid var(--borda);
}
.section h2 {
  font-size: 1.7rem;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
}
.section-text {
  font-size: 1.05rem;
  color: var(--cinza);
  max-width: 70ch;
}
.section-text a { color: var(--azul); }

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.card {
  border: 1px solid var(--borda);
  border-radius: 12px;
  padding: 24px;
  background: #fff;
}
.card h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.card p {
  color: var(--cinza);
  font-size: 0.98rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--borda);
  padding: 32px 0;
  color: var(--cinza);
  font-size: 0.9rem;
}
.footer-links { margin-top: 8px; }
.footer-links a { color: var(--azul); text-decoration: none; }
.footer-links span { margin: 0 8px; color: var(--borda); }

/* Privacy page */
.doc { padding: 56px 0; }
.doc h1 {
  font-size: 2rem;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.doc .atualizado {
  color: var(--cinza);
  font-size: 0.9rem;
  margin-bottom: 32px;
}
.doc h2 {
  font-size: 1.25rem;
  margin: 32px 0 12px;
}
.doc p, .doc li {
  color: var(--cinza);
  margin-bottom: 10px;
}
.doc ul { padding-left: 22px; }
.doc a { color: var(--azul); }

/* Responsivo */
@media (max-width: 640px) {
  .hero { padding: 56px 0; }
  .hero h1 { font-size: 1.8rem; }
  .cards { grid-template-columns: 1fr; }
  .header-inner { height: 56px; }
  nav a { margin-left: 16px; font-size: 0.9rem; }
  .logo { font-size: 1rem; }
}