body {
    font-family: Arial, sans-serif;
    background-color: #121212;
    color: #ffffff;
    margin: 0;
    padding: 0;
}

.container {
    width: 80%;
    margin: 0 auto;
    padding: 20px;
}

h1 {
    text-align: center;
    color: #ffffff;
}

#checklist {
    margin: 20px 0;
}

.checklist-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px;
    border: 1px solid #333;
    border-radius: 5px;
    margin: 5px 0;
    background-color: #1e1e1e;
    color: #ffffff;
    transition: background-color 0.3s ease;
}

.checklist-item:hover {
    background-color: #2a2a2a;
}

.checklist-item input[type="checkbox"] {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid #007bff;
    border-radius: 3px;
    margin-right: 10px;
    cursor: pointer;
    position: relative;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.checklist-item input[type="checkbox"]:checked {
    background-color: #007bff;
    border-color: #007bff;
}

.checklist-item input[type="checkbox"]:checked::after {
    content: '\f00c';
    font-family: 'FontAwesome';
    color: #ffffff;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 14px;
}

.checklist-item input[type="checkbox"]::after {
    content: '';
    display: block;
    width: 14px;
    height: 14px;
    background: transparent;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease;
}

.checklist-item label {
    flex: 1;
}

.checklist-item .delete-icon {
    color: #ff4d4d;
    cursor: pointer;
    margin-left: 10px;
}

#addItemButton {
    display: block;
    width: 100%;
    padding: 10px;
    background-color: #007bff;
    color: #ffffff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

#addItemButton:hover {
    background-color: #0056b3;
}

.notes-section {
    margin-top: 20px;
    border-top: 1px solid #333;
    padding-top: 20px;
}

.notes-section h2 {
    text-align: center;
    color: #ffffff;
}

#notes {
    margin: 20px 0;
}

.note-item {
    padding: 10px;
    border: 1px solid #333;
    border-radius: 5px;
    margin: 5px 0;
    background-color: #1e1e1e;
    color: #ffffff;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.note-item .edit-icon {
    color: #007bff;
    cursor: pointer;
    margin-left: 10px;
}