styles.css

@import url("https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;600&display=swap");

* {
  font-family: "Open Sans", sans-serif;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  height: 100vh;
  background-color: #DCDCDC;
}

button {
  border: 1px solid #000;
  border-radius: 5px;
  background-color: #A9A9A9;
  color: #fff;
  text-align: center;
  padding: 5px;
}


button:hover {
  background-color: #fff;
  color:#A9A9A9
}

input[type="text"] {
  padding: 5px;
  border-radius: 5px;
  border: 1px solid black;
}

.group {
  display: flex;
  align-items: center;
  flex-direction: column;
  background-color:	#FFFAFA;
  width: 20%;
  padding: 1.3rem 1.3rem;
  border: 1px solid lightgray;
  text-align: center;
}

.submit_2 {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto;
  margin-top: 10px;
}

#tasks {
  display: flex;
  flex-direction: column;
  margin-top: 20px;
}

.task-item {
  display: flex;
  align-items: center;
  margin-bottom: 10px;
}

:checked + label {
  text-decoration: line-through;
  color: #FF0000;
  font-style: italic;
}

footer {
  text-align: center;
  width: 100%;
  position: fixed;
  bottom: 0;
  font-size: 12px;    
}

footer a{
  text-decoration: none;
  color: #000;
}

footer a:hover {
  color: rgb(160, 160, 160);
  transition: all 0.4s ease;
}

@media (max-width: 1024px) {
  .contador {
      width: 100%;
  }

  .button {
    margin-top: 10px;
  }
}

@media (max-width: 650px) {

  .group {
      width: 80%;
  }
}