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

body {
  font-family: Arial, sans-serif;
  background: #1e1e1e;
  color: #f5f5f5;
  line-height: 1.6;
  padding: 20px;
}

/* Cabeçalho e menu */
header {
  background: #292929;
  padding: 15px 20px;
  margin-bottom: 30px;
  border-radius: 10px;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  justify-content: center;
}

nav a {
  text-decoration: none;
  color: #f5f5f5;
  font-weight: bold;
  transition: color 0.3s;
}

nav a:hover {
  color: #ff5555;
}

/* Conteúdo */
h1, h2, h3 {
  margin-bottom: 15px;
  text-align: center;
}

p, ol, ul {
  margin-bottom: 20px;
}

.imagem-principal {
  display: block;
  max-width: 300px;
  margin: 20px auto;
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(255, 0, 0, 0.5);
}

.destaque {
  color: #ff4444;
  font-weight: bold;
}

/* Listas */
ol, ul {
  padding-left: 40px;
}

/* Tabela */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px auto;
  background: #2a2a2a;
  border-radius: 10px;
  overflow: hidden;
}

th, td {
  border: 1px solid #444;
  padding: 10px;
  text-align: center;
}

th {
  background: #444;
}

/* Formulário */
form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 400px;
  margin: 20px auto;
  padding: 20px;
  background: #2a2a2a;
  border-radius: 10px;
}

input[type="text"],
input[type="email"] {
  padding: 10px;
  border: none;
  border-radius: 5px;
}

input[type="submit"] {
  background: #ff4444;
  color: white;
  font-weight: bold;
  padding: 10px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

input[type="submit"]:hover {
  background: #ff2222;
}

/* Rodapé */
footer {
  margin-top: 40px;
  text-align: center;
  font-size: 0.9rem;
  color: #aaa;
}