/* ヘッダー・フッター・セクション骨格・読み物ページの共通枠 */

.site-footer,
.section {
  background-color: var(--color-bg);
  color: var(--color-text);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 200;
  padding: var(--header-pad-y) var(--space-outer);
  background-color: transparent;
  color: var(--color-dark);
  pointer-events: none;
  transition: color 0.25s ease, opacity 0.32s ease, visibility 0.32s ease;
}

.site-header.is-on-hero {
  background-color: transparent;
  color: var(--color-dark);
}

.site-header.is-on-light {
  background-color: var(--color-light);
  color: var(--color-dark);
}

.site-header.is-on-dark {
  background-color: var(--color-dark);
  color: var(--color-light);
}

.site-header.is-fv-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.site-header-inner,
.site-header a,
.site-header button {
  pointer-events: auto;
}

.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-logo {
  min-width: 0;
}

.site-logo-link {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  max-width: 100%;
  color: inherit;
  text-decoration: none;
}

.site-logo-mark {
  flex: 0 0 auto;
  font-family: var(--font-en);
  font-weight: 500;
  font-size: clamp(18px, 1.4vw, 20px);
  line-height: 1.2;
  letter-spacing: 0.14em;
}

.site-logo-divider {
  flex: 0 0 auto;
  width: 1px;
  height: 0.95em;
  background-color: color-mix(in srgb, currentColor 32%, transparent);
}

.site-logo-tagline {
  flex: 0 1 auto;
  min-width: 0;
  font-family: var(--font-ja);
  font-weight: 400;
  font-size: clamp(10px, 0.82vw, 12px);
  line-height: 1.35;
  letter-spacing: 0.08em;
  color: color-mix(in srgb, currentColor 58%, transparent);
  white-space: nowrap;
}

.site-logo-tagline-short {
  display: none;
}

@media (max-width: 374px) {
  .site-logo-tagline-full {
    display: none;
  }

  .site-logo-tagline-short {
    display: inline;
  }
}

.site-menu-button {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 2.5rem;
  height: 2.5rem;
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.site-menu-line {
  display: block;
  width: 1.25rem;
  height: 1px;
  margin-inline: auto;
  background-color: currentColor;
}

.site-nav-list,
.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.75rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav-list {
  font-family: var(--font-en);
  font-weight: 500;
  font-size: clamp(13px, 0.97vw, 14px);
  line-height: 1.35;
  letter-spacing: 0.12em;
}

.site-nav-list a,
.footer-nav-list a {
  text-decoration: none;
}

.site-nav-list a:hover,
.footer-nav-list a:hover {
  text-decoration: underline;
  text-underline-offset: 0.3em;
}

body:not(.home) .site-main {
  padding-top: clamp(4.5rem, 10vw, 6rem);
}

.section {
  padding: var(--space-section) var(--space-outer);
}

.section-heading {
  font-size: clamp(1.5rem, 4.2vw, 3rem);
  font-weight: 500;
  line-height: 1.25;
  letter-spacing: 0.04em;
}

.site-footer {
  flex-shrink: 0;
  padding: clamp(1.75rem, 4vw, 2.75rem) var(--space-outer) clamp(1.6rem, 3.5vw, 2.4rem);
  border-top: 1px solid color-mix(in srgb, var(--color-text) 18%, transparent);
  background-color: var(--page-bg, var(--color-bg));
  color: var(--page-fg, var(--color-text));
}

.site-footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto auto;
  column-gap: 3rem;
  row-gap: 0.7rem;
  align-items: baseline;
}

.footer-name {
  grid-column: 1;
  grid-row: 1;
  margin: 0;
  font-weight: 500;
  font-size: 14px;
  line-height: 1.4;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-nav {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
}

.footer-nav-list {
  justify-content: flex-end;
  font-family: var(--font-en);
  font-weight: 500;
  font-size: clamp(13px, 0.97vw, 14px);
  line-height: 1.4;
  letter-spacing: 0.12em;
}

.footer-legal {
  grid-column: 2;
  grid-row: 2;
  justify-self: end;
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
  letter-spacing: 0.06em;
}

.footer-legal a {
  color: color-mix(in srgb, currentColor 62%, transparent);
  text-decoration: none;
}

.footer-legal a:hover {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.28em;
}

.site-copyright {
  grid-column: 1;
  grid-row: 2;
  margin: 0;
  font-family: var(--font-en);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
  color: color-mix(in srgb, currentColor 52%, transparent);
}

.site-copyright small {
  font-size: inherit;
}

.site-main {
  flex: 1 0 auto;
}

.page-article,
.post-article,
.post-list,
.column-archive {
  padding: var(--space-section) var(--space-outer);
}

.page-header {
  margin-bottom: var(--space-stack);
}

.page-title {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 500;
  line-height: 1.3;
}

.post-list-item + .post-list-item {
  margin-top: var(--space-stack);
  padding-top: var(--space-stack);
  border-top: var(--line-width) solid var(--color-line);
}

.post-list-title {
  font-size: clamp(1.125rem, 2vw, 1.5rem);
  font-weight: 500;
}

.post-list-title a {
  text-decoration: none;
}

.post-list-title a:hover {
  text-decoration: underline;
}

.post-categories {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
}

.post-date {
  margin-top: 0.5rem;
  font-family: var(--font-en);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
}

.post-thumbnail {
  margin: var(--space-stack) 0;
}

.post-thumbnail img {
  width: 100%;
}

.custom-logo-link img {
  height: auto;
  width: auto;
  max-height: 2.5rem;
}

@media (max-width: 899px) {
  .site-menu-button {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    padding: 0.25rem var(--space-outer) 1.25rem;
  }

  .site-header.is-nav-open .site-nav {
    display: block;
    background-color: var(--color-light);
  }

  .site-nav-list {
    flex-direction: column;
    align-items: flex-end;
    gap: 0.95rem;
    font-size: 14px;
  }
}

@media (max-width: 767px) {
  .site-logo-link {
    gap: 0.5rem;
  }

  .site-logo-tagline {
    font-size: 10px;
    letter-spacing: 0.06em;
  }

  .site-footer-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    justify-items: start;
    row-gap: 1.75rem;
  }

  .footer-name,
  .footer-nav {
    grid-column: 1 / -1;
    grid-row: auto;
    justify-self: start;
  }

  .site-copyright {
    grid-column: 1;
    grid-row: auto;
    justify-self: start;
  }

  .footer-legal {
    grid-column: 2;
    grid-row: auto;
    justify-self: end;
  }

  .footer-legal a {
    white-space: nowrap;
  }

  .footer-nav-list {
    justify-content: flex-start;
    gap: 0.7rem 1.25rem;
  }
}