body {
  font-family: 'Noto Sans Gujarati', sans-serif;
  background: linear-gradient(to top right, #fff7e6, #ffcc80);
  margin: 0;
  padding: 0;
  min-height: 100vh;
}

.header {
  background-color: #ff7043;
  color: white;
  padding: 20px;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
}

.output-box {
  padding: 20px;
  font-size: 24px;
  background: #fff3e0;
  border: 2px solid #ffccbc;
  border-radius: 10px;
  text-align: center;
  color: #bf360c;
  margin-bottom: 30px;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.letters {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(70px, 1fr));
  gap: 15px;
}

.letter {
  background: linear-gradient(145deg, #ffa726, #fb8c00);
  color: white;
  font-size: 26px;
  border-radius: 12px;
  padding: 15px 0;
  text-align: center;
  cursor: pointer;
  transition: 0.3s ease;
  box-shadow: 0 4px 6px rgba(0,0,0,0.2);
  user-select: none;
}

.letter:hover {
  transform: scale(1.05);
  background: linear-gradient(145deg, #fb8c00, #ef6c00);
}

.letter:active {
  transform: scale(0.95);
}

.keyboard-instruction {
  text-align: center;
  margin-top: 20px;
  color: #5d4037;
  font-size: 16px;
}

@media (max-width: 600px) {
  .letters {
    grid-template-columns: repeat(auto-fit, minmax(50px, 1fr));
    gap: 10px;
  }
  .letter {
    font-size: 22px;
    padding: 12px 0;
  }
  .output-box {
    font-size: 20px;
    padding: 15px;
  }
}