/* ===== REGRAS COMUNS ===== */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background-color: #d6e6f2;
  color: #333;
  font-family: Arial, sans-serif;
}

.wrapper {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
}

.centro { text-align: center; }
.max400 { width: 100%; max-width: 400px; height: auto; display: inline-block; border: 0; }
.bloco-grande { padding: 8px 0 16px; border-top: 1px solid #c5d6e3; }

/* Header */
.header {
  background-color: #2d5c88;
  color: #fff;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.titulos { flex: 1; }
.titulo { font-size: 36px; font-weight: bold; line-height: 1.1; }
.subtitulo { font-size: 16px; margin-top: 6px; opacity: .95; }
.logo { max-width: 120px; height: auto; margin-left: 20px; }

/* Nav */
.nav {
  background-color: #1a3e5f;
  text-align: center;
  padding: 10px 0;
}
.nav a {
  color: #fff;
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
}
.nav a:hover { text-decoration: underline; }

/* Iframe */
.conteudo iframe {
  width: 100%;
  height: 80vh;
  border: none;
}

/* ===== AJUSTES PARA TELEMÓVEL ===== */
@media (max-width: 768px) {
  body { padding: 12px; }

  .wrapper {
    width: 100%;
    max-width: none;
    padding: 0;
  }

  .header {
    flex-wrap: wrap;
    gap: 12px;
    padding: 14px 12px;
  }
  .titulo { font-size: 26px; }
  .subtitulo { font-size: 14px; }
  .logo { max-width: 80px; margin-left: 0; }

  .nav {
    padding: 8px 6px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
  }
  .nav a {
    margin: 0;
    padding: 8px 10px;
    border: 1px solid rgba(255,255,255,.2);
    border-radius: 6px;
    line-height: 1;
  }

  .conteudo { padding-top: 8px; }
  .conteudo iframe { height: 72vh; }
}