body {
    font-family: Arial;
    background: linear-gradient(45deg, #3f87a6, #ebf8e1, #f69d3c);
    background-size: 600% 600%;
    animation: gradient 16s ease infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
    padding: 0;
}

@keyframes gradient {
    0% {background-position: 0% 50%;}
    50% {background-position: 100% 50%;}
    100% {background-position: 0% 50%;}
}

#app-container {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0px 0px 10px rgba(0,0,0,0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    max-width: 90vw;
}

#main-heading {
    text-align: center;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    column-gap: 10px;
    row-gap: 10px;
    margin-top: 10px;
    align-items: center;
}

#todo-input, #todo-date {
    font-size: 15px;
    padding: 10px 5px;
    border: none;
    border-radius: 5px;
    background-color: #555;
    color: white;
}

.btn-delete {
    background-color: rgb(87, 4, 4);
    color: white;
    border: none;
    border-radius: 10px;
    padding: 15px 0px;
    cursor: pointer;
}

.btn-todo {
    background-color: rgb(5, 119, 19);
    color: white;
    border: none;
    border-radius: 10px;
    padding: 15px 0px;
    cursor: pointer;
}

.btn-todo:hover, .btn-delete:hover {
    transform: scale(1.1);
    transition: transform 0.3s ease;
}