body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to right, #667eea, #764ba2);
  color: white;
  text-align: center;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 400px;
  margin: 100px auto;
  background: rgba(0, 0, 0, 0.3);
  padding: 20px;
  border-radius: 15px;
  box-shadow: 0 0 20px rgba(0,0,0,0.4);
}

h1 {
  margin-bottom: 20px;
}

.timer-display {
  font-size: 4em;
  margin: 20px 0;
  font-weight: bold;
}

.controls button {
  padding: 10px 25px;
  margin: 10px;
  font-size: 1.1em;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s;
}

.start { background-color: #4CAF50; }
.pause { background-color: #f39c12; }
.reset { background-color: #e74c3c; }

.controls button:hover {
  transform: scale(1.05);
}

.settings {
  margin-top: 20px;
}

.settings label {
  display: block;
  margin: 10px 0;
  font-size: 1em;
}

.settings input {
  width: 60px;
  padding: 5px;
  font-size: 1em;
  border-radius: 5px;
  border: none;
  text-align: center;
}