* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  background: #555;
  color: #eee;
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", YuGothic,
    Meiryo, "Noto Sans JP", "Noto Sans CJK JP", Verdana, Arial, sans-serif;
  font-size: 11px;
  line-height: 1.5;
}

.page {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding: 34px 0;
}

h1 {
  margin: 0;
  text-align: center;
  font-size: 20px;
  font-weight: 400;
  letter-spacing: .20em;
  line-height: 1.2;
}

h1 a {
  color: inherit;
  text-decoration: none;
}

.home {
  margin-top: 46px;
}

.photo,
.hibernating {
  width: 70%;
  margin: 0 auto;
}

.photo img {
  display: block;
  width: 100%;
}

.date {
  margin-top: 8px;
  color: #c0c0bc;
  font-size: 10px;
  letter-spacing: .07em;
}

.hibernating {
  position: relative;
  aspect-ratio: 1;
}

.hibernating span {
  position: absolute;
  top: 30%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  text-align: center;
  color: #c0c0bc;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 13px;
  font-style: italic;
  letter-spacing: .03em;
}

.archive {
  width: 100%;
  margin-top: 46px;
  padding: 0 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: 10px;
  row-gap: 20px;
}

.archive-item {
  min-width: 0;
  color: inherit;
  text-decoration: none;
}

.archive-item img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.archive-item span {
  display: block;
  margin-top: 6px;
  color: #c0c0bc;
  font-size: 9px;
  letter-spacing: .07em;
  white-space: nowrap;
}

.footer {
  margin-top: auto;
  padding-top: 52px;
  text-align: center;
}

.archive-link {
  color: #c0c0bc;
  font-size: 9px;
  letter-spacing: .10em;
  text-decoration: none;
}

.footer-meta {
  margin-top: 12px;
  color: #c0c0bc;
  font-size: 9px;
  letter-spacing: .08em;
  opacity: .74;
}

.archive-footer .footer-meta {
  margin-top: 0;
}

.years {
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  cursor: pointer;
}

.mail-space {
  position: relative;
  height: 14px;
  margin-top: 5px;
}

.mail {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  color: #c0c0bc;
  font-size: 9px;
  letter-spacing: .04em;
  white-space: nowrap;
  visibility: hidden;
  opacity: 0;
}

.mail.visible {
  visibility: visible;
  opacity: .78;
}

[hidden] {
  display: none !important;
}

@media (min-width: 700px) {
  .page {
    padding-top: 48px;
  }

  .home,
  .archive {
    margin-top: 58px;
  }

  .photo,
  .hibernating {
    width: 400px;
  }

  .archive {
    width: min(900px, calc(100% - 68px));
    padding: 0;
    margin-left: auto;
    margin-right: auto;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 20px;
    row-gap: 26px;
  }

  .footer {
    padding-top: 72px;
  }
}