.app {
  width: 750px;
  height: 350px;
  display: flex;
  flex-direction: column;
  align-items: center;
  border-radius: 5px;
  border: 1px solid #E6EEF0;
  padding: 20px;
  box-sizing: border-box;
  background-color: white;
  box-shadow: 0 4px 9px 0 #375c821c;
  font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}

.header-title {
  height: 50px;
  line-height: 50px;
  font-size: 36px;
  color: #444;
  text-align: center;
}

.sub-title {
  height: 35px;
  line-height: 35px;
  font-size: 26px;
  margin-top: 35px;
  color: #444;
  text-align: center;
}

.todo-list {
  display: flex;
  justify-content: center;
}

.todo-title {
  height: 25px;
  line-height: 25px;
  font-size: 18px;
  color: #614444;
}

.button {
  width: 150px;
  height: 45px;
  border-radius: 5px;
  background-color: #223a7c;
  color: white;
  box-shadow: 2px 2px 5px #16314d98;
  margin-top: 25px;
  outline: none;
  border: 0;
  cursor: pointer;
  transition: 0.3s;
}

.button:hover {
  box-shadow: 4px 4px 8px #16314d63;
  background-color: #40558f;
}