:root {
  color-scheme: light;
}

html {
  min-height: 100%;
}

body {
  min-height: 100%;
  margin: 0;
  padding: clamp(16px, 2.5vw, 34px);
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.65;
}

.modern-page-title,
.modern-section-title {
  display: block !important;
  color: #073f73;
  font-family: "Segoe UI", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  font-weight: 600;
  letter-spacing: 0.01em;
  text-shadow: none;
}

.modern-page-title {
  width: min(760px, 100%);
  margin: 0 auto 34px;
  padding: 12px 20px 13px;
  border-top: 3px solid #174d7d;
  border-bottom: 1px solid #91abc1;
  background: #e1ebf3;
  font-size: clamp(28px, 3.4vw, 36px);
  line-height: 1.25;
}

.modern-page-title + .legacy-title-image + br,
.modern-page-title + .legacy-title-image + br + br,
.modern-page-title + .legacy-title-image + br + br + br {
  display: none;
}

.modern-section-title {
  margin: 4px 0 12px;
  font-size: clamp(23px, 3vw, 30px);
  line-height: 1.35;
}

.modern-section-title small {
  display: inline-block;
  margin-left: 0.35em;
  color: #526b7f;
  font-size: 0.58em;
  font-weight: 500;
}

.legacy-title-image {
  display: none;
}

a {
  text-underline-offset: 0.18em;
}

a:link {
  color: #064fc1;
}

a:visited {
  color: #7b2c91;
}

a:hover {
  text-decoration: underline;
}

.legacy-home-return-area {
  margin: 32px 0 12px;
  text-align: center;
}

.legacy-home-return {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid #7798b3;
  background: #f5f9fc;
  color: #064b83;
  font-weight: 600;
  text-decoration: none;
}

.legacy-home-return:hover,
.legacy-home-return:focus-visible {
  background: #e3eef6;
  text-decoration: underline;
}

table {
  max-width: 100%;
  margin-inline: auto;
}

img {
  max-width: 100%;
  height: auto;
}

iframe[src*="youtube.com/embed/"] {
  display: block;
  width: min(480px, 92%);
  aspect-ratio: 16 / 9;
  height: auto;
  margin: 14px auto 24px;
  border: 0;
  background: #111;
}

img[src^="http://visit.geocities.jp/"] {
  display: none;
}

.lightbox-trigger {
  display: block;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: zoom-in;
}

.lightbox-trigger img {
  display: block;
  border: 0 !important;
}

.lightbox-trigger:focus-visible {
  outline: 3px solid #0a5795;
  outline-offset: 3px;
}

.image-lightbox {
  width: min(96vw, 1200px);
  max-width: none;
  max-height: 92vh;
  padding: 46px 18px 16px;
  border: 1px solid #8ca4b7;
  background: #f8fbfd;
  color: #17334c;
}

.image-lightbox::backdrop {
  background: rgba(7, 18, 28, 0.82);
}

.image-lightbox img {
  display: block;
  max-width: 100%;
  max-height: calc(92vh - 90px);
  margin: auto;
  object-fit: contain;
}

.image-lightbox p {
  margin: 8px 0 0;
  text-align: center;
}

.lightbox-close {
  position: absolute;
  top: 8px;
  right: 10px;
  width: 34px;
  height: 34px;
  border: 1px solid #7790a4;
  border-radius: 50%;
  background: #fff;
  color: #17334c;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 680px) {
  body {
    padding: 12px;
    font-size: 14px;
  }

  blockquote {
    margin-inline: 0;
  }

  table,
  tbody,
  tr,
  td {
    max-width: 100%;
  }
}

.mobile-legacy body {
  padding: 12px;
  font-size: 14px;
}

.mobile-legacy blockquote {
  margin-inline: 0;
}

.mobile-legacy table,
.mobile-legacy tbody,
.mobile-legacy tr,
.mobile-legacy td {
  max-width: 100%;
}

.mobile-photo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  width: 100%;
  margin: 14px auto 24px;
}

.mobile-photo-card {
  min-width: 0;
  padding: 8px;
  border: 1px solid #aeb8c0;
  background: #fff;
  box-sizing: border-box;
}

.mobile-photo-media {
  display: grid;
  min-height: 88px;
  margin-bottom: 8px;
  place-items: center;
}

.mobile-photo-media a {
  display: block;
  width: 100%;
}

.mobile-photo-media img {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 180px;
  margin: auto;
  border: 0 !important;
  object-fit: contain;
}

.mobile-photo-caption {
  min-width: 0;
  font-size: 13px;
  line-height: 1.55;
  overflow-wrap: anywhere;
  text-align: left;
}