html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", sans-serif;
  color: #333;
}

header {
  background-color: white;
  position: sticky;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 11px 5%;
  border-bottom: 1px solid #6d90c9;
}

header .logo {
  color: #6d90c9;
  font-size: 30px;
  font-weight: bold;
}

header nav a {
  margin-left: 20px;
  text-decoration: none;
  color: #000;
  font-size: 14px;
}

h2 {
  text-align: center;
  color: #6d90c9;
  margin: 50px 0 0 0;
}

.empty {
  text-align: center;
  margin: 50px  auto;
}

.empty th{
  padding: 10px;
  border: solid 1px black;
}
.empty td{
  padding: 10px;
  border: solid 1px black;
}


.year{
  text-align: center;
  border-top: solid 1px #ccc;
  padding: 15px 0 20px 0;
}



footer {
  text-align: center;
  font-size: 10px;
  padding: 20px 5%;
  border-top: 1px solid #ccc;
}

/* スマホサイズ */
@media screen and (max-width: 640px) {
  .main {
    display: flex;
    flex-direction: column;
    text-align: center;
  }

.empty{
  max-width: 640px;
}

}