h1.entry-title {
  padding: 0.5em 0;/*上下の余白*/
  border-top: solid 3px #364e96;/*上線*/
  border-bottom: solid 3px #364e96;/*下線*/
}

h2 {
  padding: 0.5em 0;/*上下の余白*/
  border-bottom: solid 3px #364e96;/*下線*/
}


h3 {
  padding: 0.5em;
  background: aliceblue;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.23);
}