body {
  margin: 0;
  padding: 0;
  font-family: 'Arial', sans-serif;
  background-color: #f7f7f7;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
  background: #ffffff;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  max-width: 600px;
  width: 100%;
}

.palette {
  display: flex;
  justify-content: space-between;
  margin: 20px 0;
  gap: 10px;
}

.color {
  flex: 1;
  height: 100px;
  border-radius: 6px;
  position: relative;
  cursor: pointer;
}

.hex {
  position: absolute;
  bottom: 5px;
  width: 100%;
  text-align: center;
  font-weight: bold;
  color: #fff;
  text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
}
button {
  background-color: #4CAF50;
  color: white;
  padding: 12px 25px;
  font-size: 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

button:hover {
  background-color: #388e3c;
}