body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
}

header {
    background-color: #343a40;
    color: #fff;
    padding: 10px 20px;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.top-bar-left, .top-bar-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.top-bar select, .top-bar input {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    margin-right: 10px;
}

.top-bar button {
    background-color: #007bff;
    color: #fff;
    border: none;
    padding: 10px;
    cursor: pointer;
    border-radius: 5px;
}

.top-bar button:hover {
    background-color: #0056b3;
}

.content {
    padding: 20px;
}

.bookmarks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

.bookmark-category {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 15px;
}

.bookmark-category h3 {
    margin-top: 0;
    font-size: 1.2em;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bookmark-category h3 .category-actions {
    font-size: 0.8em;
}

.bookmark-category ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.bookmark-category li {
    background-color: #f8f9fa;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bookmark-category li a {
    text-decoration: none;
    color: #007bff;
}

.bookmark-category li a:hover {
    text-decoration: underline;
}

.bookmark-category .actions {
    display: flex;
    gap: 5px;
}

.bookmark-category .actions button {
    background-color: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.2em;
}

.bookmark-category .actions button:hover {
    color: #0056b3;
}