chore: tune style

Author: SSShooter

src/index.less

@@ -99,7 +99,7 @@
         pointer-events: all;
         max-width: 800px;
         white-space: pre-wrap;
-        line-height: 1; // assure the line-height consistency between different languages
+        line-height: 1.2; // assure the line-height consistency between different languages
         #input-box {
           padding: 5px;
         }
@@ -152,11 +152,6 @@
         position: absolute;
         height: 18px;
         width: 18px;
-        // line-height: 12px;
-        text-align: center;
-        // border-radius: 50%;
-        // border: 1px solid #4f4f4f;
-        // background-color: #fff;
         background-image: url('./icons/add-circle.svg');
         background-repeat: no-repeat;
         background-size: contain;
@@ -246,6 +241,7 @@
   top: 0;
   left: 0;
   background-color: #fff;
+  color: #666666;
   width: max-content; // let words expand the div and keep max length at the same time
   max-width: 800px;
   z-index: 11;