body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f3f3f3;
  margin: 0;
  padding: 20px;
  transition: background 0.3s;
}

body.dark {
  background-color: #121212;
  color: #f0f0f0;
}

.tool-container {
  max-width: 800px;
  margin: auto;
  background: white;
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
  transition: background 0.3s, color 0.3s;
}

body.dark .tool-container {
  background: #1e1e1e;
  color: #f0f0f0;
}

h1 {
  margin: 0;
}

.top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

textarea {
  width: 100%;
  height: 200px;
  padding: 15px;
  font-size: 16px;
  border-radius: 8px;
  border: 1px solid #ccc;
  resize: vertical;
  margin-top: 20px;
}

.counts p {
  font-size: 16px;
  margin: 8px 0;
}

.btns {
  margin-top: 15px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

button {
  padding: 10px 20px;
  background: #0066ff;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background: #004cc7;
}

#darkModeToggle {
  background: #333;
  padding: 8px 14px;
  border-radius: 8px;
}