body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: url('https://blogger.googleusercontent.com/img/a/AVvXsEjJE_XGG34MUGF5EKYtlWs0csHJjK9xAiHMrCb5vVYa_qOPBITtJmvA93M0cVMeT3M0ArgC8zVDVHL9yiUQpWRILX4_BIgDLu7mgeFphXEBd9oppd0PPUmFbhGpZ_dejTfv2smLTu1JlNsrCgpCIGF3wM5eItbVhQOhNAfrEeItl_T-gBERD43O5WvyygI=s1600-rw') no-repeat center center fixed;
    background-size: cover;
    animation: backgroundAnimation 10s infinite alternate;
}

@keyframes backgroundAnimation {
    0% {
        filter: brightness(1);
    }
    100% {
        filter: brightness(0.8);
    }
}

.container {
    width: 50%;
    margin: 50px auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
    animation: fadeIn 1s ease-in-out;
    background: linear-gradient(135deg, #fefdd0ab 0%, #4a4750a9 100%);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

.input-group {
    display: flex;
    justify-content: space-between;
}

input[type="text"] {
    width: 80%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

button {
    padding: 10px;
    border: none;
    background: #28a745;
    color: white;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #218838;
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg,#ada3a973 0%, #f9a8658a  100%);
    color: rgb(0, 0, 0);
    transition: background 0.3s, transform 0.3s;
}

li.done {
    text-decoration: line-through;
    color: #888;
    background: linear-gradient(135deg, #fefdd070 0%, #4a47503d 100%);
    animation: doneAnimation 1s ease-out forwards;
}

@keyframes doneAnimation {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}