* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Nunito", sans-serif;
}

body {
  background: linear-gradient(135deg, #ffffff, #ffffff);
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: black;
}

h1 {
  margin-bottom: 1rem;
  font-size: 2.5rem;
  text-shadow: 0 2px 5px #137fd9;
  color: black;
}

#game-container {
  background: white;
  color: black;
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 0 20px rgba(0,0,0,0.2);
  text-align: center;
  width: 90%;
  max-width: 400px;
}

#word {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  height: 3rem;
}

.btn-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

button {
  padding: 1rem;
  border: none;
  border-radius: 10px;
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  transition: transform 0.2s, opacity 0.2s;
  color: white;
  background-color: #137fd9;
}

button:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

#score {
  margin-top: 1rem;
  font-size: 1.2rem;
  color: #004279;
  font-weight: bold;
}

#timer {
  margin-top: 0.5rem;
  font-size: 1rem;
  color: #137fd9;
}

#restart {
  margin-top: 1rem;
  padding: 0.7rem 1.2rem;
  border: none;
  border-radius: 8px;
  background-color: #137fd9;
  color: white;
  font-size: 1rem;
  cursor: pointer;
  display: none;
}

#restart:hover {
  background-color: #0b5fa8;
}

@media (prefers-color-scheme: dark) {
  body {
    background: #111827;
    color: #e6edf3;
  }

  h1 {
    color: #93c5fd;
    text-shadow: 0 2px 5px #0b5fa8;
  }

  #game-container {
    background: #0f1724;
    color: #e6edf3;
    box-shadow: 0 0 20px rgba(0,0,0,0.7);
  }

  button {
    background-color: #1f2937;
    color: #e6edf3;
  }

  button:hover {
    background-color: #0d5fa7;
  }

  #score {
    color: #93c5fd;
  }

  #timer {
    color: #60a5fa;
  }

  #restart {
    background-color: #0d5fa7;
  }

  #restart:hover {
    background-color: #137fd9;
  }
}

@media (max-width: 1024px) {
  h1 {
    font-size: 2rem;
  }
  #word {
    font-size: 2rem;
    height: 2.5rem;
  }
  button {
    font-size: 1.1rem;
    padding: 0.9rem;
  }
  #restart {
    font-size: 0.9rem;
    padding: 0.6rem 1rem;
  }
}

@media (max-width: 768px) {
  h1 {
    font-size: 1.8rem;
  }
  #word {
    font-size: 1.8rem;
    height: 2rem;
  }
  button {
    font-size: 1rem;
    padding: 0.8rem;
  }
  #restart {
    font-size: 0.85rem;
    padding: 0.5rem 0.9rem;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }
  #word {
    font-size: 1.5rem;
    height: 1.8rem;
  }
  button {
    font-size: 0.9rem;
    padding: 0.7rem;
  }
  #restart {
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
  }
}