.sidebar-search {
    margin-bottom: 20px;
}

.sidebar-search input[type="text"] {
    width: 100%;
    padding: 8px;
    margin-bottom: 5px;
    box-sizing: border-box;
}

.sidebar-search button {
    width: 100%;
    padding: 8px;
    cursor: pointer;
}

.sidebar-search button {
    width: 100%;
    padding: 10px;
    background-color: #000; /* 黒 */
    color: #fff;            /* 白文字 */
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.sidebar-search button:hover {
    opacity: 0.8; /* ホバーで少し薄く */
}