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

/* TIPOGRAFIA BÁSICA */
body {
  font-family: 'Montserrat', sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #fff;
  background-color: #222f3e;
  -webkit-font-smoothing: antialiased;
}

/* CONTAINERS */
.container {
  width: 100%;
  max-width: 1100px;
  padding: 0 16px;
  margin: 0 auto;
}

/* LAYOUT FLEXÍVEL */
.flex {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.flex-center {
  justify-content: center;
  align-items: center;
}
.flex-column {
  flex-direction: column;
}

/* CABEÇALHO / NAVBAR */
header {
  background-color: #005f99;
  padding: 16px 0;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}
nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  padding: 0;
}
nav a {
  color: #fff;
  font-weight: bold;
  text-decoration: none;
  font-size: 1rem;
}

/* HERO */
.hero {
  padding: 60px 16px;
  text-align: center;
  background: linear-gradient(120deg, #005f99 60%, #ff6600 100%);
  color: #fff;
}
.hero h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}
.hero p {
  font-size: 1.1rem;
  margin-bottom: 24px;
}

/* BOTÕES */
.btn {
  background: #ff6600;
  color: #fff;
  padding: 14px 24px;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: bold;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  width: 100%;
  text-align: center;
}
.btn:hover {
  background-color: #fff;
  color: #005f99;
}

/* SEÇÕES PRINCIPAIS */
main {
  padding: 32px 16px;
}
main h2 {
  font-size: 1.6rem;
  color: #ff6600;
  text-align: center;
  margin-bottom: 24px;
}

/* GRID DE CARDS */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.card {
  background: rgba(255,255,255,0.08);
  padding: 24px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 4px 14px rgba(0,0,0,0.1);
}
.card h3 {
  color: #ff6600;
  font-size: 1.2rem;
  margin-bottom: 12px;
}
.card p {
  color: #f0f4f8;
  font-size: 1rem;
}

/* RODAPÉ */
footer {
  text-align: center;
  padding: 20px;
  background-color: #1a2233;
  color: #ff6600;
  font-size: 0.9rem;
}

/* MEDIA QUERY PARA TELAS MAIORES */
@media (min-width: 768px) {
  nav {
    flex-direction: row;
    justify-content: space-between;
    padding: 0 24px;
  }

  nav ul {
    flex-direction: row;
  }

  .hero h1 {
    font-size: 3rem;
  }

  .hero p {
    font-size: 1.25rem;
  }

  .btn {
    width: auto;
  }

  .card-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }
}