body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(to right, #2980b9, #6dd5ed);
  margin: 0;
  padding: 2rem;
  transition: background 0.5s ease;
}

body.dark-mode {
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  color: white;
}

.app-container {
  max-width: 600px;
  margin: auto;
  background-color: #ffffffcc;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
  text-align: center;
  animation: fadeIn 1s ease-in-out;
}

body.dark-mode .app-container {
  background-color: #1f2a36cc;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

h1 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.search-container {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

input, button {
  padding: 0.7rem;
  font-size: 1rem;
  border-radius: 8px;
  border: 1px solid #ccc;
  transition: all 0.3s ease;
}

input {
  width: 70%;
}

button {
  background-color: #0077b6;
  color: white;
  cursor: pointer;
}

button:hover {
  background-color: #023e8a;
}

.weather-result, .forecast-result {
  margin-top: 1.5rem;
  padding: 1.5rem;
  border-radius: 12px;
  text-align: center;
}

body.dark-mode .weather-result,
body.dark-mode .forecast-result {
  background-color: #2e3b4e;
  color: white;
}

.weather-icon {
  font-size: 48px;
  margin: 0.5rem auto;
  color: #f39c12;
  filter: none;
}

.forecast-day {
  margin-top: 1rem;
  border-top: 1px solid #ddd;
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.toggle-mode {
  position: fixed;
  bottom: 1rem;
  right: 1rem;
  padding: 0.5rem 1rem;
  background: #444;
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  z-index: 100;
  transition: background 0.3s;
}

.toggle-mode:hover {
  background: #222;
}