* {
  box-sizing: border-box;
}

body {
  background-color: rgb(241, 236, 236);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  margin: 0;
  font-family: Arial, sans-serif;
}

.to_do_container {
  background-color: white;
  padding: 30px;
  width: 100%;
  max-width: 400px;
  text-align: center;
  border-radius: 5px;
  box-shadow: 5px 5px 10px 0.5px rgb(111, 105, 105);
}

input[type="text"] {
  padding: 10px;
  border: 2px solid black;
  border-radius: 10px;
  width: 80%;
  margin-bottom: 10px;
}

button {
  border: none;
  background-color: #d9d9d9;
  color: #555;
  padding: 8px 14px;
  border-radius: 5px;
  cursor: pointer;
  margin: 5px 3px;
}

button:hover {
  background-color: #bbb;
}

ul {
  list-style-type: none;
  padding: 0%;
  margin-top: 15px;
}

li {
  background-color: #d9d9d9;
  margin: 5px 0;
  padding: 10px;
  border-radius: 5px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  word-break: break-word;
}

li.completed {
  text-decoration: line-through;
  color: #888;
}

.edit-input {
  width: 100%;
  font-size: 1em;
  padding: 6px;
  border-radius: 5px;
  border: 1px solid #ccc;
  box-sizing: border-box;
}

@media (max-width: 500px) {
  .to_do_container {
    padding: 20px;
    width: 90%;
  }

  input[type="text"] {
    width: 100%;
  }
}