body {
  margin: 0;
  height: 100vh;
  display: flex;
  justify-content: center;   /* horizontal center */
  align-items: center;       /* vertical center */
  background: #f0f0f0;
  font-family: Arial, sans-serif;
}

.login-container {
  background: #ddd;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  width: 90%;          /* take up most of mobile width */
  max-width: 400px;    /* but not too wide on desktop */
  text-align: center;
}

.login-container h2 {
  margin-bottom: 1.5rem;
}

.login-container form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.login-container input,
.login-container button {
  padding: 0.75rem;
  border: 1px solid #aaa;
  border-radius: 5px;
  font-size: 1rem;
}

.login-container button {
  background: #444;
  color: #fff;
  cursor: pointer;
  border: none;
}

.login-container button:hover {
  background: #333;
}