introduce css file

Author: shuoweil

bigframes/display/table_widget.css

@@ -0,0 +1,74 @@
+/**
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+.table-container {
+	max-height: 500px;
+	overflow: auto;
+}
+
+.footer {
+	align-items: center;
+	display: flex;
+	font-size: 0.8rem;
+}
+
+.footer > * {
+	flex: 1;
+}
+
+.pagination {
+	align-items: center;
+	display: flex;
+	flex-direction: row;
+	gap: 4px;
+	justify-content: center;
+	padding: 4px;
+}
+
+.page-size {
+	align-items: center;
+	display: flex;
+	flex-direction: row;
+	gap: 4px;
+	justify-content: end;
+}
+
+table {
+	border-collapse: collapse;
+	text-align: left;
+	width: 100%;
+}
+
+th {
+	background-color: #f8f9fa;
+	position: sticky;
+	top: 0;
+	z-index: 1;
+}
+
+button {
+	cursor: pointer;
+	display: inline-block;
+	text-align: center;
+	text-decoration: none;
+	user-select: none;
+	vertical-align: middle;
+}
+
+button:disabled {
+	opacity: 0.65;
+	pointer-events: none;
+}