:root{
    --clr-primary: rgb(155, 54, 199);
    --clr-light: #f4f4f4;
    --clr-dark: #333;
    --clr-warning: rgb(99, 36, 36);
    
}   

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

body {
    margin: 0;
    font-family: "Work Sans", sans-serif;
    font-weight: 300;
    font-size: 1.5rem;
    background: linear-gradient(0.25turn, #9d87c6, #b89bd2, #d1b0df, #e8c7ed, #fedefc);
    color: var(--clr-light);

    display: grid;
    grid: 
    /* the first row of content */
    "header header header header" auto
    /* positioning the columns */
    "...... lists active ......" auto/
    1fr minmax(100px, 300px) minmax(250px, 500px) 1fr;
}

.title{
    grid-area: header;
    text-align: center;
    font-size: calc(7vw + 2rem);
    font-weight: 900;
    color: rgba(0, 0, 0, 0.1);
    letter-spacing: 2px;
    margin: -0.1em 0 0.5em;
}

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

.task-list{
    font-size: 2rem;
    line-height: 1.7;
    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;
    border: 0;
    padding: 0;
    /* color of the text */
    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;

    /* when the user clicks on the line */
    transition: border-bottom 150ms ease-in;
}

.new::placeholder {
    opacity: 0.4;
}

/* the line will get thicker when the user selects it */
.new:focus {
    border-bottom-width: 3px;
}

/* the palceholder will become nearly transparent upon clicking the line */
.new:focus::placeholder {
    opacity: 0.2;
}

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


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

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

/* active refers to teh active list */
.todo-list{
    --spacer:2rem;

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

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

list-title{
    margin: 0;
    /* this will prevent the elements of the todo header from overlapping */
    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);
}

/* make the default checkboxes disappear */
[type="checkbox"]{
    opacity: 0;
    position: absolute;
}

/* the line under each task to mimmick an actual lined paper */
.task label{
  display: inline-flex;
  align-items: center;  
  position: relative;
}

.task {
    position: relative;
    margin-bottom: 1.25em;
}

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

.custom-checkbox{
    --size: 0.75em;
    display: inline-block;
    width: var(--size);
    height :var(--size);
    margin-right: var(--size);
    cursor: pointer;
    border: 2.3px solid currentColor;
    border-radius: 50%;
    transform: scale(1);
    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;
}

/* crossing out the tasks animation 
* this will blurr/cross out the tasks that are completed
*/

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

.task label::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    left: 1.5em;
    top: calc(50% - 1.5px);
    height: 3px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 300ms 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: rgb(21, 2, 13);
}