* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Roboto Slab", serif;
    color: #2a454b;

}

.container {
    width: 100%;
    min-height: 100vh;
    background: linear-gradient(90deg, hsla(205, 46%, 10%, 1) 0%, #2a454b 50%, rgb(41, 72, 97) 100%);
    padding: 10px;
}

.do-box {
    width: 100%;
    max-width: 540px;
    background: #fff;
    margin: 100px auto 20px;
    padding: 40px 30px 70px;
    border-radius: 10px;
}

.do-box h2 {
    color: black;
    display: flex;
    align-items: center;
    margin-top: 20px;
    cursor: pointer;
}

.do-box img {
    width: 30px;
    margin-left: 10px;
    cursor: pointer;

}

.row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #e2dfdf;
    border-radius: 30px;
    margin-top: 20px;
    padding-left: 20px;
}

#search-field {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    padding: 10px
}

.cssbuttons-io-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .2em;
    font-family: inherit;
    font-weight: 600;
    font-size: 16px;
    padding: .5em 1.5em;
    color: white;
    background: linear-gradient(0deg, rgb(0, 150, 60), rgb(100, 250, 150));
    border: none;
    outline: none;
    border-bottom: 3px solid rgb(0, 130, 40);
    box-shadow: 0 .5em .5em -.4em rgb(0, 0, 0, .5);
    letter-spacing: 0.08em;
    border-radius: 20em;
    cursor: pointer;
    transition: .5s;
}

.cssbuttons-io-button:hover {
    filter: brightness(1.2);
    color: rgb(0, 0, 0, .5);
}

.cssbuttons-io-button:active {
    transition: 0s;
}

ul li {
    list-style: none;
    font-size: 18px;
    padding: 18px 8px 12px 40px;
    cursor: pointer;
    position: relative;
}

ul li::before {
    content: '';
    position: absolute;
    height: 28px;
    width: 28px;
    border-radius: 50%;
    background-image: url(pictures/icons8-unchecked-checkbox-50.png);
    background-size: cover;
    background-position: center;
    top: 17px;
    left: 5px;
}

ul li.checked {
    color: #2a454b;
    text-decoration: line-through;
}

ul li.checked::before {
    background-image: url(pictures/icons8-checked-checkbox-50.png);
    background-size: cover;
}

ul li span {
    position: absolute;
    right: 0;
    width: 40px;
    height: 40px;
    top: 10px;
    font-size: 22px;
    line-height: 40px;
    text-align: center;
}

ul li span:hover {
    background-color: #e2dfdf;
    border-radius: 50%;
}