body {
  font-family: Arial, sans-serif;
  background: #3b82f6; /* blue background */
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  text-align: center;
  background: #ffffff;
  padding: 30px 25px;
  border-radius: 15px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
  width: 350px;
}

#display {
  font-size: 32px;
  margin-bottom: 20px;
  font-weight: bold;
  color: #222;
  border: 2px solid #ddd;
  padding: 15px 20px;
  border-radius: 10px;
  background: #f9f9f9;
  box-shadow: inset 0 2px 6px rgba(0,0,0,0.1);
}

.buttons {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 15px;
}

.buttons button {
  flex: 1;
  min-width: 70px;
  padding: 10px;
  border: none;
  border-radius: 8px;
  color: white;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.3s ease;
}

#startBtn { background: #e74c3c; } /* Red */
#pauseBtn { background: #2980b9; } /* Blue */
#resetBtn { background: #27ae60; } /* Green */
#lapBtn   { background: #f39c12; } /* Orange */

.buttons button:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

#laps {
  margin-top: 15px;
  list-style: none;
  padding: 0;
  max-height: 120px;
  overflow-y: auto;
}

#laps li {
  background: #f1f1f1;
  margin: 5px 0;
  padding: 8px;
  border-radius: 6px;
  font-size: 14px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}