/* Layout flat moderno, acessível e responsivo */
:root {
  --bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #2563eb;
  --primary-contrast: #ffffff;
  --surface: #f9fafb;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1100px;
  padding: 0 20px;
  margin: 0 auto;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
}

.brand {
  font-weight: 700;
  color: var(--text);
}

.site-nav ul {
  display: flex;
  gap: 16px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav a {
  display: inline-block;
  padding: 10px 12px;
  border-radius: 8px;
  color: var(--text);
}

.site-nav a.active, .site-nav a:hover {
  background: var(--surface);
}

.nav-toggle { display: none; }

.hero {
  padding: 64px 0 40px;
  background: linear-gradient(180deg, var(--surface), var(--bg));
}

.hero h1 { font-size: 2rem; margin: 0 0 12px; }
.hero p { color: var(--muted); max-width: 720px; }
.hero-actions { margin-top: 20px; display: flex; gap: 12px; }

.btn {
  display: inline-block;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--bg);
}
.btn-primary { background: var(--primary); color: var(--primary-contrast); border-color: var(--primary); }
.btn-secondary { background: var(--surface); }
.btn:hover { filter: brightness(0.98); }

.features { padding: 32px 0; }
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  background: var(--bg);
}

.process { padding: 24px 0; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.step { border: 1px solid var(--border); border-radius: 12px; padding: 16px; background: var(--bg); }
.step-number { display: inline-block; width: 28px; height: 28px; border-radius: 50%; background: var(--surface); text-align: center; line-height: 28px; font-weight: 700; margin-bottom: 6px; }

.cta { padding: 40px 0; background: var(--surface); text-align: center; }

.site-footer { padding: 24px 0; border-top: 1px solid var(--border); background: var(--bg); }
.footer-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.list-plain { list-style: none; padding-left: 0; }

/* Tipografia de páginas internas */
.page-header { padding: 32px 0; background: var(--surface); border-bottom: 1px solid var(--border); }
.page-header h1 { margin: 0; font-size: 1.75rem; }
.content { padding: 24px 0; }
.content h2 { margin-top: 24px; }
.content p, .content li { color: var(--muted); }

/* Tabelas simples */
table { width: 100%; border-collapse: collapse; }
th, td { border: 1px solid var(--border); padding: 10px; text-align: left; }

/* Responsivo */
@media (max-width: 900px) {
  .grid-3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: inline-block; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--bg); }
  .site-nav { display: none; position: absolute; right: 20px; top: 64px; background: var(--bg); border: 1px solid var(--border); border-radius: 12px; }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; padding: 8px; }
}