css table width

1table, th, td {
2  border: 1px solid black;
3}

1<table style="width: 100%;">...</table> 

1<table>
2  <tr> <!-- This is the first row -->
3    <th>This is the heading</th>
4    <th>Next heading to the right</th>
5  </tr>
6  <tr> <!-- This is the second row -->
7    <td>This is where the table data goes</td>
8    <td>This is the second columns data</td>
9  </tr>
10</table>

1table, th, td {
2    padding: 1.5%;
3    border: 1px solid white;
4    text-align: center;
5}
6
7button{
8    width: 100%;
9    height: 100%;
10    padding: 2px ;
11    margin: 2px;
12}
13
14body {
15    background-image: url(https://images.unsplash.com/photo-1574375927938-d5a98e8ffe85?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=1949&q=80);
16    height: 100%;
17    
18    background-position: center;
19    background-repeat: no-repeat;
20    background-size: cover;
21    color: honeydew;
22}
23
24.h1-header, h1{
25    text-align: center;
26    width: 100%;
27    height: 70px;
28    font-size: 14px;
29    padding-top:0px ;
30}
31h1 {
32    font-size: 36px;
33    font-style: italic;
34
35}
36.form1 {
37    float: left;
38
39width: 20%;
40height: 300px;
41margin: 150px 0 0 200px;
42    background-color: #3a303099;
43
44}
45.form1 #form {
46    color: honeydew;
47    
48}
49form{
50    padding: 50px;
51    }
52    
53
54.table {
55    width: 35%;
56    margin: 150px 200px 0 800px;
57
58}
59
60table{
61padding: 50px 120px;
62}
63