* { box-sizing: border-box; font-family: Arial, Helvetica, sans-serif; }

body { margin: 0; background: #f5f7fa; color: #333; }

header { background: #0b1c2d; color: #fff; }

nav a { color: #fff; margin-left: 15px; text-decoration: none; }

.container { max-width: 1100px; margin: auto; padding: 20px; }

.hero { background: #fff; padding: 40px; border-radius: 6px; }

.btn { background: #1e90ff; color: #fff; padding: 10px 15px; text-decoration: none; }

form input, form textarea {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
}

form button {
  background: #1e90ff;
  color: white;
  border: none;
  padding: 10px 15px;
  cursor: pointer;
}

footer {
  text-align: center;
  background: #0b1c2d;
  color: white;
  padding: 20px;
  margin-top: 40px;
}