body {
  font-family: -apple-system, sans-serif;
  max-width: 600px;
  margin: 60px auto;
  padding: 0 20px;
}

textarea {
  width: 100%;
  height: 100px;
  font-size: 16px;
  padding: 10px;
  box-sizing: border-box;
}

button {
  margin-top: 10px;
  padding: 10px 20px;
  font-size: 16px;
  cursor: pointer;
}

#result {
  margin-top: 30px;
  padding: 20px;
  background: #f5f5f5;
  border-radius: 8px;
  display: none;
}

#score {
  font-size: 48px;
  font-weight: bold;
}

#error {
  color: #b00;
  margin-top: 10px;
}

#tokens {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.token {
  padding: 4px 8px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 14px;
  white-space: pre;
}

.token-0 { background: #ffd6d6; }
.token-1 { background: #ffe8b3; }
.token-2 { background: #d6f5d6; }
.token-3 { background: #d6e8ff; }
.token-4 { background: #e8d6ff; }
.token-5 { background: #ffd6f0; }