body {
    background-image: linear-gradient(45deg, rgb(111,000,207), rgb(23,168,240));
    background-size: 100% 50vh;
    background-repeat: no-repeat;
    background-color: rgb(240,241,244);
}
.w {
    width: 950px;
    margin: 20px auto;
    padding: 0 10px;
    box-sizing: border-box;
}
.bar {
    height: 150px;
    line-height: 200px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.bar .bar__title {
    font-weight: bold;
    font-size:30px;
    color: white;
}
.bar .bar__moon {
    width: 30px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    border-radius:8px;
    background-color: rgb(199,203,211);
    cursor: pointer;
}

.add_ops {
    height: 80px;
    line-height: 80px;
    /* padding: 0 20px; */
    background-color: rgb(255,255,255);
    border-radius: 10px;
    color: rgb(100,104,123);
    display: flex;
    justify-content:space-evenly;
    align-items: center;
}

.add_ops input[type=input] {
    width: 80%;
    height: 60%;
}
.add_ops button {
    cursor: pointer;
    height: 50px;
    width: 50px;
}
.add_opps__icon {
    border: 1px solid black;
    width: 1em;
    height: 1em;
    border-radius: 50%;
    line-height: 1em;
    text-align: center;
}
.tasks {
    background-color: rgb(255,255,255);
    border-radius: 10px;
    height: 30em;
    overflow: auto;
}
.tasks__header, .tasks__list__item {
    display: flex;
    justify-content:space-between;
    border-bottom: 1px solid black;
    font-size: 16px;
}
.tasks__header {
    height: 50px;
    color:#657C9B; 
    line-height: 50px;
    font-size: 25px;
}
.tasks__header button {
    height: 70%;
    color:#657C9B;  
    font-size: 20px;
}
.tasks__list__item {
    height: 40px;
    line-height: 40px;
    position: relative;
}
.tasks__list__item__left {
    display: flex;
}
.tasks__list__item__left input:checked + div {
    text-decoration: line-through;
}
.tasks__list__item__content {
    margin-left:5px;
}
.tasks__list__item__right a {
    margin-left: 5px
}
.tasks__list__item__right a:first-child:hover + div, .tasks__list__item__right__edit:hover {
    width: 300px;
    height: 50px;
    line-height: 50px;
    box-sizing: border-box;
}
.tasks__list__item__right__edit {
    position: absolute;
    padding: auto 5px;
    text-align: center;
    width: 0px;
    height: 0px;
    right: 0px;
    background-color: #c8c2c2;
    z-index: 100;
    top: 20px;
    border-radius: 5px;
    box-shadow: 5px 5px 3px #847f7f;
    overflow: hidden;
    transition: all 0.5s ease;
}