body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: #0A1A2F;
  color: #ffffff;
}

header {
  background-color: #081525;
  padding: 20px;
  text-align: center;
}

header h1 {
  margin: 0;
}

.btn {
  background: #0D3B66;
  color: white;
  padding: 10px 20px;
  border: none;
  text-decoration: none;
  font-weight: bold;
  border-radius: 5px;
  margin-top: 10px;
  display: inline-block;
}

main {
  padding: 20px;
}

.login-container {
  max-width: 400px;
  margin: 100px auto;
  background: #112233;
  padding: 30px;
  border-radius: 8px;
}

.login-container input {
  width: 100%;
  padding: 10px;
  margin: 10px 0;
  background: #1A2B3C;
  border: none;
  color: white;
}

.login-container button {
  width: 100%;
  padding: 10px;
  background: #0D3B66;
  border: none;
  color: white;
  font-weight: bold;
  cursor: pointer;
}