body {
  font-family: Arial, sans-serif;
  text-align: center;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  color: white;
  min-height: 100vh;
  margin: 0;
  position: relative;
  overflow: hidden;
}

/* Dark overlay */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5); /* adjust darkness */
  z-index: 0;
}

.weather-app {
  position: relative;
  z-index: 1; /* above overlay */
  background: rgba(0, 0, 0, 0.6);
  padding: 20px;
  border-radius: 15px;
  display: inline-block;
  margin-top: 50px;
}

input, button {
  padding: 10px;
  margin: 5px;
  border-radius: 8px;
  border: none;
}

button {
  cursor: pointer;
  background: #ff9800;
  color: white;
}

.unit-toggle {
  margin-top: 10px;
}

.weather-info img {
  width: 100px;
}