/* General Styles */
body {
    background-color: var(--background-color);
    font-family: Arial, sans-serif;
    color: var(--text-color);
    margin: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    transition: background-color 0.3s ease;
}

:root {
    --background-color: #2a2a2e; /* Dark background */
    --text-color: #e0e0e0; /* Light text color for contrast */
    --container-color: #33333d; /* Darker container background */
    --clock-date-color: #a5d6a7; /* Light pastel green */
    --task-color: #444450; /* Darker background for tasks */
    --completed-task-color: #616161; /* Slightly lighter background for completed tasks */
    --completed-task-text-color: #bdbdbd; /* Greyed out text for completed tasks */
    --button-color: #80cbc4; /* Pastel teal */
    --button-hover-color: #4db6ac; /* Slightly darker teal on hover */
    --clear-btn-color: #f4c78f; /* Pastel pink for clear button */
    --clear-btn-hover-color: #f06292; /* Slightly darker pastel pink on hover */
    --feedback-color: #f06292; /* Feedback message color */
}

body.light-mode {
    --background-color: #f0f0f0; /* Light background */
    --text-color: #333; /* Dark text color */
    --container-color: #fff; /* Light container background */
    --clock-date-color: #333; /* Dark text color */
    --task-color: #f9f9f9; /* Lighter background for tasks */
    --completed-task-color: #e0e0e0; /* Slightly darker background for completed tasks */
    --completed-task-text-color: #666; /* Darker greyed out text for completed tasks */
    --button-color: #4db6ac; /* Darker teal */
    --button-hover-color: #80cbc4; /* Lighter teal on hover */
    --clear-btn-color: #f06292; /* Darker pastel pink */
    --clear-btn-hover-color: #f4c78f; /* Lighter pastel pink on hover */
    --feedback-color: #f06292; /* Feedback message color */
}

.container {
    background-color: var(--container-color);
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
    width: 95%;
    max-width: 550px;
    margin: 20px;
}

h1 {
    text-align: center;
    color: var(--button-color);
    font-size: 2rem;
}

.clock-date {
    display: flex;
    justify-content: space-between;
    margin-bottom: 25px;
    font-size: 1.8rem;
}

#clock, #date {
    font-weight: bold;
    color: var(--clock-date-color);
}

.task-input {
    display: flex;
    flex-direction: column;
    margin-bottom: 25px;
}

.task-input input[type="text"], 
.task-input input[type="time"],
.task-input select {
    text-align: center;
    width: 90%;
    padding: 15px;
    margin-bottom: 15px;
    border: 1px solid #555;
    border-radius: 8px;
    background-color: var(--task-color);
    color: var(--text-color);
    font-size: 1.2rem;
}

button {
    background-color: var(--button-color);
    color: var(--container-color);
    border: none;
    padding: 15px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: background-color 0.3s ease;
    width: 100%;
}

button:hover {
    background-color: var(--button-hover-color);
}

h2 {
    color: var(--button-color);
    text-align: center;
    font-size: 1.6rem;
    margin: 25px 0 15px;
}

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

li {
    background-color: var(--task-color);
    padding: 15px;
    margin-bottom: 15px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
    font-size: 1.2rem;
    color: var(--text-color);
}

li.completed {
    background-color: var(--completed-task-color);
    text-decoration: line-through;
    color: var(--completed-task-text-color);
}

li button {
    background-color: transparent;
    width: 30%;
    border: none;
    color: #f4c78f; /* Pastel pink for delete button */
    cursor: pointer;
    font-size: 1.4rem;
}

li button:hover {
    color: #c47b21; /* Slightly darker pastel pink on hover */
}

.clear-btn {
    background-color: var(--clear-btn-color);
    color: var(--container-color);
    border: none;
    padding: 15px;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 15px;
    width: 100%;
    transition: background-color 0.3s ease;
    font-size: 1.2rem;
}

.clear-btn:hover {
    background-color: var(--clear-btn-hover-color);
}

.feedback {
    color: var(--feedback-color);
    text-align: center;
    margin-bottom: 15px;
    display: none;
}

/* Priority-based styles */
li.low {
    border-left: 5px solid #4caf50; /* Green for low priority */
}

li.medium {
    border-left: 5px solid #ff9800; /* Orange for medium priority */
}

li.high {
    border-left: 5px solid #f44336; /* Red for high priority */
}

/* Responsive Design */
@media (min-width: 480px) {
    .container {
        max-width: 450px;
    }

    .clock-date {
        font-size: 1.2rem;
    }

    h1 {
        font-size: 2.4rem;
    }

    h2 {
        font-size: 1.8rem;
    }

    li {
        font-size: 1.4rem;
    }

    button, .clear-btn {
        font-size: 1.4rem;
    }
}

#toggleThemeBtn {
    font-size: 1.0rem;
    padding-top: 2%;
    padding-bottom: 6%;
    height: 1.5rem;
}

/* Priority-based styles */
li.low {
    border-left: 5px solid #4caf50; /* Green for low priority */
}

li.medium {
    border-left: 5px solid #ff9800; /* Orange for medium priority */
}

li.high {
    border-left: 5px solid #f44336; /* Red for high priority */
}