style.css

:root {

  --bg-background: rgb(190 , 183 , 164);

  --bg-title: rgb(255 , 127 , 17);

  --border-bottom-title: rgb(63 , 63 , 61);

  --bg-main: white;

  --line-throug: black;

  --color-title: rgb(37 , 37 , 37);

  --width-total: 1180px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  background-color: var(--bg-background);
}

#content {
  max-width: var(--width-total);
  height: auto;
  margin: 0 auto;
  padding: 20px;
}

main {
  width: 100%;
  height: auto;
  padding: 20px;
  background-color: var(--bg-main);
  border-radius: 25px;
}

#titulo {
  font-weight: 600;
  background-color: var(--bg-title);
  border-bottom: 1px solid var(--border-bottom-title);
}

#contentHeader {
  max-width: var(--width-total);
  height: auto;
  margin: 0 auto;
  padding: 20px;
  text-align: center;
  color: var(--color-title);
}

#info {
  color: var(--color-title);
  padding-bottom: 5px;
}

#funcionamento {
  color: var(--border-bottom-title);
}

#search {
  width: 100%;
  height: auto;
  margin-top: 30px;
}

#container-list {
  width: 95%;
  height: auto;
  padding: 10px;
  margin: 20px auto 10px;
}

.completed {
  text-decoration: line-through solid var(--line-throug);
  font-weight: 600;
}

#controlPanel {
  width: 100%;
  height: auto;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

#controlPanel button {
  margin: 0 10px;
  padding: 3px 5px;
}