:root {
    --bg-color: #f0f2f5;
    --text-color: #000;
    --table-bg: #fff;
    --highlight: #e6f0ff;
    --editable-bg: #fffbe6;
    --button-bg: #007bff;
    --button-hover: #0056b3;
}

[data-theme="dark"] {
    --bg-color: #1e1e1e;
    --text-color: #eee;
    --table-bg: #2b2b2b;
    --highlight: #334a66;
    --editable-bg: #333025;
    --button-bg: #375a7f;
    --button-hover: #1f3f5d;
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    font-family: Arial, sans-serif;
    padding: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: var(--table-bg);
    box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

th, td {
    border: 1px solid #ccc;
    padding: 5px;
}

td[contenteditable] {
    background-color: var(--editable-bg);
    cursor: text;
}

td:focus {
    outline: 2px solid var(--button-bg);
    background-color: var(--highlight);
}

form {
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

input, select, button {
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

button {
    background-color: var(--button-bg);
    color: white;
    cursor: pointer;
}

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