:root {
  --clr-primary: rgb(54, 112, 199);
  --clr-light: #f4f4f4;
  --clr-dark: #333;
  --clr-warning: rgb(99, 36, 36);
}

*,
*::before,
*::after {
  font-family: inherit;
  box-sizing: border-box;
}

body {
  margin: 1rem 0 0 0;
  font-family: "Work Sans", sans-serif;
  font-weight: 300;
  font-size: 1.5rem;
  background-color: var(--clr-primary);
  color: var(--clr-light);
  display: grid;

  display: grid;
  grid-template-rows: auto auto;
  grid-template-columns: 1fr minmax(100px, 300px) minmax(250px, 500px) 1fr;
  grid-template-areas:
    "header header header header"
    ". lists active .";
  grid-auto-flow: initial;
  grid-auto-rows: initial;
  grid-auto-columns: initial;
}

.title {
  grid-area: header;
  text-align: center;
  font-size: calc(2vw + 2rem);
  font-weight: 900;
  color: rgba(0, 0, 0, 0.1);
  letter-spacing: 1px;
  margin: -0.3em 0 0.5em;
}

.all-tasks {
  grid-area: lists;
}

.task-list {
  line-height: 1.7;
  font-size: 1.2rem;
  list-style: circle;
  padding-left: 1.1rem;
}

.list-name {
  cursor: pointer;
}

.list-name:hover {
  opacity: 0.7;
}

form {
  display: flex;
}

.btn {
  cursor: pointer;
  background: 0;
  padding: 0;
  border: 0;
  color: inherit;
}

.btn.create {
  font-size: 1.5rem;
  font-weight: 900;
  margin-right: 0.25em;
  transition: opacity 250ms ease-in;
}

.btn.create:hover {
  opacity: 0.7;
}

.btn.delete {
  opacity: 0.7;
  font-size: 1rem;
  transition: color 200ms;
}

.btn.delete:hover {
  color: var(--clr-warning);
}

.new {
  background: transparent;
  border: 0;
  color: inherit;
  border-bottom: 1px solid currentColor;
  font-size: inherit;
  outline: none;
  padding: 0.25em;

  transition: border-bottom 150ms ease-in;
  order: 2;
}

.new::placeholder {
  /* Chrome, Firefox, Opera, Safari 10.1+ */
  color: inherit;
  opacity: 0.4;
}

.new:-ms-input-placeholder {
  /* Internet Explorer 10-11 */
  color: inherit;
}

.new::-ms-input-placeholder {
  /* Microsoft Edge */
  color: inherit;
}

.new:focus {
  border-bottom-width: 3px;
}

.new:focus::placeholder {
  opacity: 0.15;
}

.new.list {
  font-size: 1.1rem;
}

.active-list {
  font-weight: 700;
}

.todo-list {
  --spacer: 2rem;

  grid-area: active;
  background: var(--clr-light);
  color: var(--clr-dark);
}

.new.task {
  margin-bottom: 0;
}

.todo-header {
  padding: var(--spacer);
  background: #e4e4e4;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.list-title {
  margin: 0 1em 0 0;
}

.task-count {
  margin: 0;
  font-size: 1rem;
}

.todo-body {
  padding: var(--spacer);
  position: relative;
}

.new-task-creator .create {
  color: var(--clr-primary);
}

[type="checkbox"] {
  opacity: 0;
  position: absolute;
}

.task label {
  display: inline-flex;
  align-items: center;
  position: relative;
  margin-bottom: 1.5em;
}

.task {
  position: relative;
}

.task::after {
  content: "";
  position: absolute;
  right: 0;
  left: 0;
  bottom: 0.5em;
  height: 1px;
  background: currentColor;
  opacity: 0.1;
}

.custom-checkbox {
  --size: 0.75em;
  display: inline-block;
  width: var(--size);
  height: var(--size);
  cursor: pointer;
  border: 2px solid currentColor;
  border-radius: 50%;
  margin-right: var(--size);
  transition: transform 300ms ease-in-out;
}

.task:hover .custom-checkbox,
[type="checkbox"]:focus + label .custom-checkbox {
  transform: scale(1.2);
  color: var(--clr-primary);
}

[type="checkbox"]:checked + label .custom-checkbox {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  box-shadow: inset 0 0 0px 2px white;
}

[type="checkbox"]:checked + label {
  opacity: 0.5;
}

.task label::after {
  content: "";
  position: absolute;
  left: 1.5em;
  top: 50%;
  right: 0;
  height: 3px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 150ms ease-in-out;
}

[type="checkbox"]:checked + label::after {
  transform: scaleX(1);
  transform-origin: left;
}

.delete-stuff {
  display: flex;
  justify-content: space-evenly;
  position: absolute;
  width: 100%;
  left: 0;
  bottom: -35px;
  color: var(--clr-light);
}

@media screen and (max-width: 820px) {
  body {
    font-size: 1rem;
    display: grid;
    grid:
      "header header header header" auto
      "...... lists active  ......" auto /
      1fr minmax(100px, 200px) minmax(250px, 500px) 1fr;
  }
}

@media screen and (max-width: 710px) {
  body {
    font-size: 1rem;
    display: grid;
    margin: auto;
    padding: 1rem;
    font-size: 1rem;
    display: grid;
    grid-template-rows: auto auto auto;
    grid-template-columns: 1fr minmax(80px, 200px) minmax(200px, 200px) 1fr;
    grid-template-areas:
      "header header header header"
      ". lists lists ."
      ". active active .";
    grid-auto-flow: initial;
    grid-auto-rows: initial;
    grid-auto-columns: initial;
  }

  .todo-list {
    margin-top: 1rem;
  }

  .title {
    grid-area: header;
    text-align: center;
    font-size: calc(1vw + 1rem);
    font-weight: 900;
    color: rgba(0, 0, 0, 0.1);
    letter-spacing: 1px;
    margin: -0.3em 0 0.5em;
  }
}