:root {
  --bg: #ffffff;
  --text: #111111;
  --primary: #4caf50;
  --secondary: #ddd;
  --highlight: #222;
}

body.dark {
  --bg: #111111;
  --text: #ffffff;
  --primary: #4caf50;
  --secondary: #333;
  --highlight: #ffffff;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Arial', sans-serif;
  margin: 0;
  padding: 0;
  transition: background 0.3s, color 0.3s;
}

#app {
  max-width: 500px;
  margin: auto;
  padding: 30px;
  text-align: center;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header h1 {
  margin: 0;
}

button {
  background: var(--primary);
  color: var(--text);
  border: none;
  padding: 10px 20px;
  cursor: pointer;
  margin: 5px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

button:hover {
  background: var(--highlight);
  color: var(--bg);
}

input[type="text"], input[type="number"] {
  padding: 10px;
  border: 1px solid var(--secondary);
  border-radius: 8px;
  margin-top: 10px;
  width: 60%;
  transition: all 0.3s ease;
  background: var(--secondary);
  color: var(--text);
}

input:focus {
  border-color: var(--primary);
  outline: none;
}

#settingsMenu, #gameContainer {
  margin-top: 30px;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

#settingsMenu.show, #gameContainer.show {
  opacity: 1;
  transform: translateY(0);
}

#wordBoard {
  display: flex;
  justify-content: center;
  margin: 20px 0;
  gap: 10px;
}

.letter-box {
  width: 50px;
  height: 50px;
  border: 2px solid var(--secondary);
  border-radius: 10px;
  font-size: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: all 0.2s ease;
}

.letter-box.correct {
  background: var(--primary);
  color: var(--bg);
}

.letter-box.wrong {
  background: #e53935;
  color: var(--bg);
}

.hidden {
  display: none;
}