body {
  margin: 0;
  font-family: sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  text-align: center;
}

header {
  padding: 10px;
  background: #020617;
}

nav button {
  margin: 5px;
  padding: 10px;
  background: #1e293b;
  color: white;
  border: none;
  border-radius: 6px;
}

.tool {
  display: none;
  padding: 20px;
}

.tool.active {
  display: block;
}

#timer-display,
#stopwatch-display {
  font-size: 3rem;
  margin: 20px 0;
}

.controls button {
  margin: 5px;
  padding: 10px 15px;
}

textarea {
  width: 90%;
  height: 150px;
}

footer {
  margin-top: 40px;
  padding: 10px;
}

.ads {
  margin-top: 10px;
  background: #1e293b;
  padding: 10px;
}