:root {
  --fundo: #f6f8f7;
  --texto: #1d2b29;
  --suave: #5b6b68;
  --marca: #2f6f68;
  --marca-texto: #ffffff;
  --linha: #d9e2df;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fundo: #121816;
    --texto: #e6eeec;
    --suave: #9fb0ac;
    --marca: #5fb3a8;
    --marca-texto: #0f1513;
    --linha: #2a3532;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  display: flex;
  flex-direction: column;
  background: var(--fundo);
  color: var(--texto);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 16px;
  max-width: 640px;
  margin: 0 auto;
}
.marca { width: 72px; height: 72px; margin-bottom: 20px; }
.marca rect { fill: var(--marca); }
.marca path { fill: none; stroke: var(--marca-texto); stroke-width: 5; stroke-linecap: round; stroke-linejoin: round; }
h1 {
  margin: 0 0 16px;
  font-size: clamp(2rem, 6vw, 2.75rem);
  font-weight: 650;
  letter-spacing: -0.02em;
}
.frase {
  margin: 0 0 32px;
  font-size: clamp(1.05rem, 2.6vw, 1.2rem);
  color: var(--suave);
}
.contato {
  margin: 0;
  padding-top: 24px;
  border-top: 1px solid var(--linha);
  font-size: 1rem;
}
a { color: var(--marca); font-weight: 600; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--marca); outline-offset: 3px; border-radius: 2px; }
footer {
  padding: 24px 16px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--suave);
}