/* Reset básico */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Fonte e cores principais */
body {
  font-family: "Segoe UI", Arial, sans-serif;
  background: #f4f6f9;
  color: #333;
  line-height: 1.6;
}

/* Cabeçalho */
header {
  background: #1e3a8a; /* azul escuro */
  color: #fff;
  padding: 1rem;
  text-align: center;
}

header h1 {
  font-size: 1.8rem;
}

/* Menu de navegação */
nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  background: #2563eb; /* azul médio */
  padding: 0.5rem;
}

nav ul li {
  margin: 0 1rem;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: #dbeafe; /* azul claro */
}

/* Conteúdo principal */
main {
  max-width: 900px;
  margin: 2rem auto;
  padding: 1rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

section {
  margin-bottom: 2rem;
}

section h2, section h3 {
  margin-bottom: 0.5rem;
  color: #1e3a8a;
}

/* Botões */
button {
  background: #2563eb;
  color: #fff;
  border: none;
  padding: 0.6rem 1.2rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s;
}

button:hover {
  background: #1e40af;
}

/* Rodapé */
footer {
  text-align: center;
  padding: 1rem;
  background: #1e3a8a;
  color: #fff;
  margin-top: 2rem;
  font-size: 0.9rem;
}

/* --- Estilo específico para Login --- */
.login-container {
  max-width: 400px;
  margin: 5rem auto;
  padding: 2rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  text-align: center;
}

.login-container h2 {
  margin-bottom: 1.5rem;
  color: #1e3a8a;
}

.login-container label {
  display: block;
  margin: 0.5rem 0;
  text-align: left;
  font-weight: 500;
}

.login-container input {
  width: 100%;
  padding: 0.6rem;
  margin-top: 0.3rem;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.login-container button {
  width: 100%;
  margin-top: 1rem;
}

/* Responsividade */
@media (max-width: 600px) {
  nav ul {
    flex-direction: column;
  }
  nav ul li {
    margin: 0.5rem 0;
  }
}