body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    background-color: #ffffff;
    color: #333333;
    transition: background-color 0.3s ease;  
}

h1 {
    text-align: center;
    margin-top: 20px;
    color: inherit;
}

.add_new_task {
    width: 75%;
    padding: 10px;
    margin: 10px auto;
    display: block;
    font-size: 15px;
}

.add_task {
    display: block;
    margin: 0 auto;
    padding: 10px 20px;
    font-size: 15px;
    background-color: #258328;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.add_task:hover {
    background-color: #6fd274;
}

ul {
    list-style-type: none;
    padding: 0;
    margin: 0 auto;
    width: 75%;
    background-color: #ffffff;
}

li {
    background-color: #ffffff;
    padding: 10px;
    margin: 5px 0;
    border-radius: 8px;
    border: 1px solid #dddddd;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.task {
    flex-grow: 1;
    cursor: pointer;
}

.delete {
    background-color: crimson;
    color: #ffffff;
    border: none;
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
}

.delete:hover {
    background-color: red;
}

.completed {
    text-decoration: line-through;
    opacity: 0.8;
}


body.dark-mode {
    background-color: #333333;
    color: #ffffff;
}

body.dark-mode .addtask {
    background-color: #258328;
}

body.dark-mode .addtask:hover {
    background-color: #6fd274;
}

body.dark-mode ul {
    background-color: #555555;
}

body.dark-mode li {
    background-color: #777777;
    border: 1px solid #666666;
}

.light_dark_mode {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
}