* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}
body {
  background: #08111f;
  color: #fff;
}
a {
  text-decoration: none;
  color: inherit;
}
header {
  background: #132238;
  padding: 18px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.logo { color: #5fa8ff; font-size: 1.5rem; font-weight: bold; }
nav a { margin-left: 20px; color: #d6e4ff; }
.hero {
  padding: 100px 40px;
  text-align: center;
  background: linear-gradient(rgba(8,17,31,0.65), rgba(8,17,31,0.75)), url('capa-servidor.png') center/cover no-repeat;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px,1fr));
  gap: 20px;
  padding: 40px;
}
.card {
  background: #132238;
  padding: 25px;
  border-radius: 12px;
}
footer {
  text-align: center;
  padding: 20px;
  margin-top: 30px;
}