body {
        font-family: Arial, sans-serif;
        margin: 20px;
        background: #f7f9fc;
        color: #222;
    }
    h1, h2 {
        color: #004080;
    }
    section {
        background: #fff;
        border-radius: 6px;
        padding: 15px 20px;
        margin-bottom: 20px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }
    button {
        background: #007acc;
        color: white;
        border: none;
        padding: 7px 12px;
        margin-left: 5px;
        border-radius: 3px;
        cursor: pointer;
    }
    button:hover {
        background: #005fa3;
    }
    input[type="text"], input[type="number"], input[type="date"], input[type="datetime-local"] {
        padding: 6px;
        border-radius: 3px;
        border: 1px solid #ccc;
        width: 200px;
        margin-right: 10px;
    }
    ul {
        list-style-type: none;
        padding-left: 0;
    }
    li {
        padding: 5px 0;
        border-bottom: 1px solid #eee;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    li span {
        flex-grow: 1;
        margin-left: 10px;
    }
    li.completed span {
        text-decoration: line-through;
        color: #888;
    }
    .remove-item-btn {
        background: #e63946;
        padding: 4px 8px;
        font-size: 0.8rem;
        border-radius: 3px;
    }
    .remove-item-btn:hover {
        background: #b3232f;
    }
    label {
        display: block;
        margin-top: 10px;
        margin-bottom: 4px;
        font-weight: bold;
    }
    #timeDisplay {
        font-weight: bold;
        margin-top: 10px;
    }
    .flex-row {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .weekly-planner table {
        width: 100%;
        border-collapse: collapse;
    }
    .weekly-planner th, .weekly-planner td {
        border: 1px solid #ddd;
        padding: 8px;
        vertical-align: top;
    }
    .weekly-planner th {
        background-color: #004080;
        color: white;
    }
    .weekly-planner textarea {
        width: 100%;
        height: 60px;
        resize: vertical;
        border-radius: 3px;
        border: 1px solid #ccc;
        padding: 5px;
    }