:root {
  color-scheme: light;
  --paper: #ffffff;
  --surface: #f6f8fb;
  --ink: #0f1b2d;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #e2e8f0;
  --accent: #1f4f8f;
  --accent-dark: #164272;
  --accent-ink: #ffffff;
  --accent-dim: rgba(31, 79, 143, 0.08);
  --ok: #0f766e;
  --warn: #92400e;
  --shadow-sm: 0 1px 2px rgba(15, 27, 45, 0.06);
  --shadow: 0 4px 16px rgba(15, 27, 45, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 27, 45, 0.12);
  --radius: 12px;
  --ui: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --mono: ui-monospace, 'Cascadia Mono', Consolas, Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--ui);
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 { line-height: 1.2; margin: 0 0 0.5em; color: var(--ink); font-weight: 700; }
h1 { font-size: 48px; letter-spacing: -0.02em; }
h2 { font-size: 32px; letter-spacing: -0.015em; margin-bottom: 0.3em; }
h3 { font-size: 18px; }

p { margin: 0 0 1em; color: var(--ink-2); }
.fine { font-size: 13px; color: var(--muted); }
.hl { color: var(--accent); }

.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }
.row { display: flex; align-items: center; gap: 18px; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.9); backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar .container { height: 64px; }
.brand {
  display: flex; align-items: center; gap: 8px;
  font-weight: 700; font-size: 16px; color: var(--ink);
}
.brand:hover { text-decoration: none; }
.topbar nav {
  flex: 1; display: flex; gap: 24px; margin-left: 32px;
  font-size: 14px; font-weight: 500;
}
.topbar nav a { color: var(--ink-2); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  background: var(--paper); border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 18px; font: inherit; font-weight: 600; font-size: 14px;
  color: var(--ink); cursor: pointer; transition: all 150ms;
}
.btn:hover { background: var(--surface); text-decoration: none; }
.btn.primary {
  background: var(--accent); border-color: var(--accent); color: var(--accent-ink);
}
.btn.primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn.big { padding: 14px 24px; font-size: 15px; }
.btn.full { display: flex; width: 100%; margin: 20px 0 10px; }

/* ---------- hero ---------- */
.hero {
  padding: 90px 0 70px;
  background: linear-gradient(180deg, var(--surface) 0%, var(--paper) 100%);
  text-align: center;
}
.hero h1 { max-width: 860px; margin-left: auto; margin-right: auto; }
.hero .lead {
  font-size: 20px; color: var(--ink-2);
  max-width: 680px; margin: 20px auto 32px;
}
.cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 16px; }

/* ---------- trust ---------- */
.trust { padding: 40px 0 30px; }
.trust-headline {
  text-align: center; font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); font-weight: 600; margin-bottom: 20px;
}
.chips { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.chip {
  padding: 6px 14px; background: var(--surface); border: 1px solid var(--line);
  border-radius: 999px; font-size: 13px; font-weight: 500; color: var(--ink-2);
}

/* ---------- sections ---------- */
.section { padding: 80px 0; }
.section.alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.section h2 { margin-bottom: 16px; text-align: center; }
.section-sub {
  text-align: center; color: var(--muted); max-width: 680px;
  margin: 0 auto 40px; font-size: 16px;
}

/* ---------- features grid ---------- */
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px; margin-top: 40px;
}
.feat {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px; box-shadow: var(--shadow-sm);
  transition: transform 180ms, box-shadow 180ms;
}
.feat:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.feat-icon { font-size: 28px; margin-bottom: 12px; }
.feat h3 { font-size: 17px; margin-bottom: 8px; }
.feat p { font-size: 14.5px; margin: 0; color: var(--ink-2); }

/* ---------- comparativo ---------- */
.compare { max-width: 820px; margin: 32px auto 0; }
.compare table {
  width: 100%; border-collapse: collapse;
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); font-size: 14.5px;
}
.compare th, .compare td {
  padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line);
}
.compare th { background: var(--surface); font-weight: 600; font-size: 13px; }
.compare td:nth-child(2) { font-weight: 600; }
.compare .good { color: var(--ok); }
.compare tr:last-child td { border-bottom: none; }

/* ---------- preco ---------- */
.price-card {
  max-width: 480px; margin: 30px auto 0;
  background: var(--paper); border: 1px solid var(--line); border-radius: 16px;
  padding: 36px 32px; box-shadow: var(--shadow-lg);
  text-align: center;
}
.price-tag { display: flex; align-items: flex-start; justify-content: center; gap: 4px; margin-bottom: 6px; }
.price-tag .currency { font-size: 20px; color: var(--muted); font-weight: 600; margin-top: 10px; }
.price-tag .amount { font-size: 64px; font-weight: 800; letter-spacing: -0.03em; line-height: 1; color: var(--accent); }
.price-desc { color: var(--muted); margin-bottom: 20px; }
.price-list { text-align: left; list-style: none; padding: 0; margin: 20px 0 24px; }
.price-list li { padding: 7px 0; color: var(--ink-2); font-size: 14.5px; }

/* ---------- steps ---------- */
.steps {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 24px; margin-top: 40px;
}
.step { text-align: center; padding: 10px; }
.step-n {
  display: flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink);
  font-weight: 700; font-size: 18px;
  margin: 0 auto 14px;
}
.step h3 { font-size: 15px; margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--muted); margin: 0; }

/* ---------- FAQ ---------- */
details {
  background: var(--paper); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 20px; margin-bottom: 10px;
}
details summary {
  font-weight: 600; cursor: pointer; font-size: 15px;
  color: var(--ink); list-style: none; position: relative; padding-right: 28px;
}
details summary::-webkit-details-marker { display: none; }
details summary::after {
  content: '+'; position: absolute; right: 0; top: -2px;
  font-size: 22px; color: var(--muted); font-weight: 400;
}
details[open] summary::after { content: '−'; }
details[open] { background: var(--surface); }
details p { margin-top: 10px; font-size: 14.5px; }

/* ---------- footer ---------- */
footer {
  background: #0f1b2d; color: #8aa4c9; padding: 40px 0; margin-top: 60px;
}
footer .brand { color: #e2e8f0; }
footer nav { flex: 1; display: flex; gap: 24px; margin-left: 32px; font-size: 14px; }
footer nav a { color: #8aa4c9; }
footer nav a:hover { color: #e2e8f0; }
footer .fine { color: #64748b; }

/* ---------- responsive ---------- */
@media (max-width: 720px) {
  h1 { font-size: 32px; }
  h2 { font-size: 24px; }
  .hero { padding: 60px 0 50px; }
  .hero .lead { font-size: 17px; }
  .topbar nav { display: none; }
  .section { padding: 56px 0; }
  footer .row { flex-direction: column; align-items: flex-start; gap: 16px; }
  footer nav { flex-direction: column; margin-left: 0; gap: 12px; }
}

code { background: var(--surface); border: 1px solid var(--line); padding: 1px 6px; border-radius: 5px; font-family: var(--mono); font-size: 0.9em; }