body {
  font-family: Arial, sans-serif;
  background-color: #817b7b;
  display: flex;
  justify-content: center;
  padding-top: 50px;
}

.container {
  background-color: rgb(243, 229, 229);
  padding: 20px;
  border-radius: 10px;
  width: 400px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

h1 {
  text-align: center;
}

input {
  width: 70%;
  padding: 10px;
}

button {
  padding: 10px;
  cursor: pointer;
}

ul {
  list-style: none;
  padding: 0;
}

li {
  background-color: #eee;
  margin-top: 10px;
  padding: 10px;
  border-radius: 5px;
}
.concluida {
    text-decoration: line-through;
}
.barra-container{
    width:100%;
    height:10px;
    background:#ddd;
    border-radius:5px;
    margin-top:10px;
}

#barraProgresso{
    height:100%;
    width:0%;
    background:#0f1ab8;
    border-radius:5px;
    transition:0.3s;
}