style.css

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@100;300&display=swap');

* {
  margin: 0;
  padding: 0;
  text-decoration: none;
  box-sizing: border-box;
  font-family: 'Be Vietnam Pro', sans-serif;
  color: #2A313C;
}

body {
  background-color: #efd3d7;
}

.tasks {
  background-color: transparent;
}

.tasks-gray {
  background-color: rgb(128 , 128 , 128);
}

.completed {
  text-decoration: line-through solid rgb(0 , 0 , 0);
}

header {
  margin: auto 10px;
}

h1 {
  margin: 10px 40px;
  font-size: 3rem;
  padding: 10px 0;
}

#funcionamento {
  margin: auto 40px;
  font-size: 1.2rem;
  padding: 10px 0;
}

#apaga-tudo , #remover-finalizados , #salvar-tarefas , #criar-tarefa , #remover-selecionado , #mover-cima , #mover-baixo {
  font-size: 1.2rem;
  padding: 10px 20px;
  flex-grow: 5;
  font-weight: 700;
  color: white;
  border-radius: 10px;
  border: none;
  opacity: 0.8;
}

#criar-tarefa {
  background-color: #00043A;
}

#remover-selecionado {
  background-color: #EB3F33;
  flex-basis: 10px;
}

#mover-cima, #mover-baixo {
  background-color: #886F9B;
  flex-basis: 10px;
}

#salvar-tarefas {
  background-color: #279057;
}

#apaga-tudo {
  background-color: #EB3F33;
}

#remover-finalizados {
  background-color: #886F9B;
}

#apaga-tudo:hover , #remover-finalizados:hover , #salvar-tarefas:hover , #criar-tarefa:hover , #remover-selecionado:hover , #mover-cima:hover , #mover-baixo:hover {
  opacity: 1;
}

.containers {
  display: flex;
  flex-direction: column;
  height: 120px;
  margin: auto;
}

.container-buttons {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 60%;
  height: 50px;
  margin: 10px 40px;
}

.container-input {
  display: flex;
  align-items: center;
  gap: 6px;
  width: 60%;
  height: 50px;
  margin: auto 40px;
}

#texto-tarefa {
  flex-basis: 400px;
  font-size: 1rem;
  flex-grow: 1;
  font-weight: 700;
  border-radius: 10px;
  padding: 10px 20px;
}

#lista-tarefas {
  display: flex;
  flex-wrap: wrap;
  flex-direction: column;
  margin: 10px 60px;
  padding: 0 10px;
  font-size: 1.4rem;
  width: 60%;
}