*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: Arial;
}
main {
    display: grid;
    grid-template-columns: auto;
    grid-template-rows: 1fr 1fr 1fr;
    grid-template-areas:
    "h1 h2 h3"
    "b1 b2 b3"
    "f1 f2 f3";
        min-block-size: 100vb;
}

h2 {
    padding: 0 0 1em 0;
    margin-left: 40vb;
}

#content {
    grid-area: b2;
}

ul {
    list-style-type: none;
    margin-left: 40vb;
}

li {
    padding-top: 2px;
    padding-bottom: 3px;
    border-bottom: dotted 1px gray; 
    width: 300px;
    display: flex;
    justify-content: space-between;
}

button {
    border: 0;
    background: none;
    font-size: 1.2em;
}

.filled {
padding: 0;
}