* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
    user-select: none;
}

body {
    margin-top: 150px;
    background-image: linear-gradient(100deg, #1a1b1a, #537679);
    font-family: 'Work Sans', sans-serif;
    flex-direction: column;
    height: 820px;
    user-select: none;
}

.todo-header h1 {
    justify-content: space-around;
    font-size: 125px;
    font-weight: bold;
    color: #21a7a7be ;
    margin-bottom: 20px;
    text-align: center;
}

.todo-list {
    list-style-type: none;
    padding: 0;
}

.todo-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    border-bottom: 1px solid #ddd;
    background-color: #fff;
    transition: background-color 0.3s;
}

.todo-item:last-child {
    border-bottom: none;
}

.todo-item input[type="checkbox"] {
    margin-right: 10px;
}

.todo-item label {
    flex-grow: 1;
    font-size: 16px;
    color: #333;
}

.todo-item button {
    background-color: transparent;
    color: #e74c3c;
    border: none;
    cursor: pointer;
    transition: color 0.3s;
}

.todo-item button:hover {
    color: #c0392b;
}


.add-todo {
    width: 650px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    text-align: center;
    justify-content: center;
    align-items: center;
    background-color: #1a150e;
    margin-top: 50px;
    border-radius: 30px;
    padding: 10px;
    box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.1);
}

.add-todo input[type="text"] {
    flex-grow: 5;
    padding: 6px;
    font-size: 16px;
    background-color: #1a150e;
    color: #ffffff;
    border: none;
    border-radius: 5px;
    margin-right: 10px;
    outline: none;
}

.add-todo button {
    background-color: #1a150e;
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.addBtn {
    color: #818181;
    cursor: pointer;
    user-select: none;
    margin-right: 10px;
    padding: 0px 0px 0px 20px;
    
}

.add-todo:hover {
    box-shadow: 0 0 10px #818181;
    cursor: pointer;
}


#tasks {
    margin: auto;
    margin-top: 30px;
    width: 30vw;
    list-style: none;
    user-select: none;
}


#tasks li {
    cursor: pointer;
    border-radius: 30px;
    background-color: #1a150e;
    position:relative;
    padding: 15px 20px 15px 20px;
    font-size: 20px;
    color: #818181;
    transition: 0.2s;
    user-select: none;
    margin-bottom: 10px;
    transition: opacity 0.3s ease-out;
    
}  

#tasks li.fade-out {
    opacity: 0;
}

ul li.checked {
    color: #fff;
    transition: 0.2s;
    text-decoration: line-through;
    opacity: 0.5;
    background:#1a150e00;
}


.close {
    position: absolute;
    right: 0;
    top: 0;
    margin-top: 9px;
    margin-right: 10px;
    padding: 5px 20px;
}

.close:hover {
    background-color: #21a7a7be;
    box-shadow: 5px 3px #ddd;
    border-radius: 50px;
    color: #1a1b1a;
    font-weight: bold;
}

@media screen and (width: 600px) {
    ul li {
        padding: 10px 2vw; 
    }
}