* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: serif, ;
}

.container {
    width: 100%;
    min-height: 100vh;
    background: linear-gradient(135deg, #153677, #4e085f);
    padding: 10px;
}

.todo-app {
    width: 100%;
    max-width: 570px;
    background-color: white;
    margin: 80px auto 0 auto;
    padding: 20px;
    border-radius: 10px;
}

.to-do-icon {
    width: 50px;
}

.heading {
    display: flex;
    /* flex-direction: row; */
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.heading h1 {
    color: #0d1c3ad0;
}

.input-row {
    display: flex;
    background-color: rgba(136, 135, 135, 0.753);
    width: 100%;
    justify-content: space-between;
    align-items: center;
    border-radius: 20px;
    padding: 5px 5px 5px 10px;
    margin-top: 20px;
    margin-bottom: 20px;
}

#input-box {
    border: none;
    outline: none;
    background: transparent;
}

.input-row button {
    background-color: #ff8856;
    border-radius: 20px;
    position: relative;
    padding: 8px 10px 8px 10px;
    border: none;
    cursor: pointer;
    color: black;
}

.list-container {
    list-style: none;

}

ul li {
    padding: 12px 8px 12px 30px;
    user-select: none;
    cursor: pointer;
    font-size: 20px;
    display: flex;
    align-items: center;
    position: relative;
}

ul li::before {
    content: "";
    display: inline-block;
    height: 28px;
    width: 28px;
    border-radius: 50%;
    background-image: url(images/unchecked-41.png);
    background-size: cover;
    background-position: center;
    vertical-align: middle;
    margin-right: 10px;
}

ul li.checked {
    color: #555;
    text-decoration: line-through;
}

ul li.checked::before {
    background-image: url(images/checked.png);
}

ul li span {
    position: absolute;
    right: 0;
    top: 5px;
    width: 40px;
    height: aepx;
    font-size: 22px;
    color: #555;
    line-height: 40px;
    text-align: center;
    border-radius: 50%;
}
ul li span:hover {
    background-color: #b1adad;
}