body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f9f9f9;
}

header {
  background-color: #4a90e2;
  color: white;
  padding: 20px;
  text-align: center;
}

button {
  padding: 10px 15px;
  background-color: #5cb85c;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background-color: #4cae4c;
}

#taskList {
  padding: 20px;
}

.task {
  background-color: white;
  border: 1px solid #ccc;
  border-radius: 5px;
  padding: 15px;
  margin: 10px 0;
}

.modal {
  display: none; 
  position: fixed; 
  z-index: 1; 
  left: 0;
  top: 0;
  width: 100%; 
  height: 100%; 
  overflow: auto; 
  background-color: rgb(0,0,0); 
  background-color: rgba(0,0,0,0.4); 
  padding-top: 60px;
}

.modal-content {
  background-color: #fefefe;
  margin: 5% auto; 
  padding: 20px;
  border: 1px solid #888;
  width: 80%; 
}

.close {
  color: #aaa;
  float: right;
  font-size: 28px;
  font-weight: bold;
}