* {
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
}
body {
  background-color: #f1f1f1;
  padding: 0;
  margin: 0;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}
.container {
  padding-left: 15px;
  padding-right: 15px;
  margin-left: auto;
  margin-right: auto;
}

@media (min-width: 768px) {
  .container {
    width: 750px;
  }
}

@media (min-width: 992px) {
  .container {
    width: 970px;
  }
}

@media (min-width: 1200px) {
  .container {
    width: 1170px;
  }
}
form {
  padding: 20px;
  max-width: 700px;
  margin: auto;
  margin-top: 50px;
  display: flex;
  gap: 10px;
  background-color: #ededed;
  border-radius: 10px;
}
@media (max-width: 787px) {
  form {
    flex-direction: column;
  }
}
form .task-value {
  font-family: inherit;
  padding: 12px 16px;
  font-size: 1.5em;
  background-color: #fff;
  color: #2196f3;
  caret-color: #2196f3;
  border-radius: 7px;
  border: 2px solid #2196f3;
  outline: none;
  flex-grow: 1;
}
form .add-task {
  border-radius: 7px;
  border: 2px solid #2196f3;
  background-color: #2196f3;
  color: white;
  font-size: 1.5em;
  padding: 12px 16px;
  opacity: 0.7;
  cursor: pointer;
  transition: 0.3s;
}
form .add-task:hover {
  opacity: 1;
}
.tasks-count {
  text-align: center;
  padding: 20px 0 0;
  font-size: 20px;
}
.tasks {
  background-color: #e9e9e9;
  border-radius: 10px;
  padding: 12px 16px;
  line-height: 1.6em;
  margin: 30px auto;
  max-width: 800px;
  max-height: 500px;
  overflow-y: scroll;
}
.tasks::-webkit-scrollbar {
  background-color: #ddd;
  width: 5px;
}
.tasks::-webkit-scrollbar-thumb {
  background-color: #f44336;
  border-radius: 10px;
}
.tasks .task {
  background-color: #dededd;
  padding: 12px 16px;
  margin: 15px auto;
  font-size: 1.2em;
  border-radius: 10px;
  display: flex;
  align-items: center;
}
.tasks .task:hover {
  opacity: 1;
}
.tasks .task.done {
  opacity: 0.5;
  cursor: pointer;
}
.tasks .task .text {
  flex-grow: 1;
}
.tasks .task .del {
  background-color: #f44336;
  color: white;
  border-radius: 5px;
  padding: 10px 16px;
  opacity: 0.8;
  cursor: pointer;
  transition: 0.3s;
}
.tasks .task .del:hover {
  opacity: 1;
}
.del-all {
  width: fit-content;
  background-color: #f44336;
  color: white;
  border: none;
  font-size: 1.5em;
  padding: 10px 16px;
  border-radius: 7px;
  margin: 10px auto;
  display: block;
  opacity: 0.8;
  cursor: pointer;
  transition: 0.3s;
}
.del-all:hover {
  opacity: 1;
}