:root {
  --bg: #141e30;
  --text: #ffffff;
  --box: #1c1c1c;
  --accent: #00b894;
  --secondary: #0984e3;
}

body.light-mode {
  --bg: #f0f0f0;
  --text: #111;
  --box: #ffffff;
}

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  text-align: center;
  padding: 40px;
  margin: 0;
  transition: background 0.3s, color 0.3s;
}

.container {
  background-color: var(--box);
  padding: 30px;
  border-radius: 15px;
  max-width: 450px;
  margin: auto;
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.15);
  transition: background 0.3s;
}

input[type="number"] {
  padding: 10px;
  font-size: 16px;
  width: 80%;
  margin-bottom: 15px;
  border: none;
  border-radius: 5px;
  outline: none;
}

button {
  padding: 10px 20px;
  font-size: 16px;
  margin: 10px 5px;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

#guessButton {
  background-color: var(--accent);
  color: white;
}

#playAgainButton {
  background-color: var(--secondary);
  color: white;
}

.top-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  margin-bottom: 10px;
}