/* Base */
:root {
  --bg: #f4f8fc;
  --bg-alt: #edf3f9;
  --surface: #ffffff;
  --surface-soft: #f7fbff;
  --border: #d7e2ee;
  --text: #17324d;
  --muted: #5c7287;
  --primary: #1f5fa8;
  --primary-dark: #15467b;
  --accent: #4d83c2;
  --shadow: 0 12px 30px rgba(23, 50, 77, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
  --container: 1120px;
  --transition: 180ms ease;
  --header-offset: 170px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-offset);
}

body {
  margin: 0;
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  font-size: 16px;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(31, 95, 168, 0.08), transparent 28%),
    linear-gradient(180deg, #f9fcff 0%, var(--bg) 48%, #f8fbfe 100%);
  line-height: 1.8;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  width: min(calc(100% - 32px), var(--container));
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 8px;
  padding: 10px 14px;
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  transform: translateY(-200%);
  transition: transform var(--transition);
  z-index: 1000;
}

.skip-link:focus {
  transform: translateY(0);
}

/* Header */
.site-topbar {
  background: var(--primary-dark);
  color: #fff;
  font-size: 0.93rem;
}

.site-topbar__text {
  margin: 0;
  padding: 10px 0;
  letter-spacing: 0.02em;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(249, 252, 255, 0.92);
  border-bottom: 1px solid rgba(215, 226, 238, 0.9);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px 0 18px;
}

.site-brand__eyebrow {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 0.86rem;
  letter-spacing: 0.08em;
}

.site-brand__name {
  margin: 0;
  font-size: clamp(1.55rem, 1.1rem + 1.4vw, 2.2rem);
  line-height: 1.2;
}

.site-brand__name a {
  color: inherit;
}

.site-brand__lead {
  margin: 8px 0 0;
  color: var(--muted);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.site-nav {
  border-top: 1px solid rgba(215, 226, 238, 0.7);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 0;
  justify-content: flex-end;
  position: relative;
}

.global-nav {
  position: fixed;
  top: 144px;
  right: max(16px, calc((100vw - var(--container)) / 2));
  z-index: 55;
  width: min(92vw, 560px);
  max-height: calc(100vh - 164px);
  overflow: auto;
  padding: 12px;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: 0 20px 42px rgba(23, 50, 77, 0.18);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.global-nav__list {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.global-nav__list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 14px;
  border-radius: 999px;
  color: var(--text);
  font-size: 0.95rem;
  transition: background var(--transition), color var(--transition);
}

.global-nav__list a:hover,
.global-nav__list a[aria-current="page"] {
  background: rgba(31, 95, 168, 0.1);
  color: var(--primary-dark);
  text-decoration: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  padding: 10px;
  box-shadow: 0 4px 14px rgba(23, 50, 77, 0.04);
}

.nav-toggle span:not(.sr-only) {
  display: block;
  height: 2px;
  border-radius: 999px;
  background: var(--primary-dark);
}

.nav-toggle span:not(.sr-only) + span:not(.sr-only) {
  margin-top: 5px;
}

.global-nav.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Layout */
.hero,
.page-hero {
  padding: 36px 0 26px;
}

.hero__inner,
.page-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.85fr);
  gap: 24px;
  align-items: stretch;
}

.hero__copy,
.page-hero__inner > div:first-child {
  padding: 8px 0;
}

.hero__kicker {
  margin: 0 0 8px;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero__title,
.page-hero__title {
  margin: 0;
  font-size: clamp(2rem, 1.4rem + 3vw, 3.6rem);
  line-height: 1.14;
}

.hero__text,
.page-hero__text {
  max-width: 64ch;
  margin: 14px 0 0;
  color: var(--muted);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card--soft {
  background: linear-gradient(180deg, #ffffff, var(--surface-soft));
}

.card--emphasis {
  background: linear-gradient(180deg, #f7fbff, #edf4fb);
}

.card__title {
  margin: 0 0 10px;
  color: var(--primary-dark);
  font-size: 1.08rem;
  font-weight: 700;
}

.hero__contact {
  padding: 24px;
}

.contact-number {
  margin: 0;
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.2;
}

.contact-number a {
  color: var(--primary-dark);
}

.contact-hours,
.contact-note {
  margin: 10px 0 0;
  color: var(--muted);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  text-decoration: none;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}

.button:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.button--primary {
  background: var(--primary);
  color: #fff;
}

.button--primary:hover {
  background: var(--primary-dark);
  color: #fff;
}

.button--secondary {
  background: #fff;
  border-color: var(--border);
  color: var(--primary-dark);
}

.button--ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--primary-dark);
}

.button--light {
  background: rgba(31, 95, 168, 0.08);
  color: var(--primary-dark);
}

.section {
  padding: 24px 0 36px;
}

.section--alt {
  background: linear-gradient(180deg, rgba(237, 243, 249, 0.6), rgba(244, 248, 252, 0.4));
  border-top: 1px solid rgba(215, 226, 238, 0.7);
  border-bottom: 1px solid rgba(215, 226, 238, 0.7);
}

.section-head {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}

.section-head--compact {
  margin-bottom: 18px;
}

.section-head__eyebrow {
  margin: 0;
  color: var(--primary);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section-head__title {
  margin: 0;
  font-size: clamp(1.4rem, 1.1rem + 0.8vw, 2rem);
  line-height: 1.28;
  scroll-margin-top: 190px;
}

.info-grid,
.content-grid,
.meeting-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  align-items: start;
}

.schedule-stack {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.info-card,
.content-card,
.news-card,
.schedule-card,
.meeting-card {
  padding: 24px;
  min-width: 0;
}

.schedule-head {
  padding-bottom: 18px;
}

.schedule-panel {
  padding-top: 20px;
}

.notice-group__label {
  margin: 0 0 16px;
  font-weight: 700;
  color: var(--primary-dark);
}

.notice-item__date,
.schedule-item__date,
.archive-entry__date,
.timeline-entry__date {
  margin: 0 0 8px;
  color: var(--primary);
  font-weight: 700;
}

.notice-item p,
.schedule-item p {
  margin: 0 0 12px;
}

.notice-item + .notice-item {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(215, 226, 238, 0.8);
}

.notice-group__link,
.schedule-item__link {
  margin: 10px 0 0;
}

.schedule-list,
.news-list,
.schedule-cards {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.schedule-list {
  margin-top: 6px;
  padding-top: 18px;
  border-top: 1px solid rgba(215, 226, 238, 0.8);
}

.schedule-panel .schedule-list {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}

.schedule-item {
  padding: 16px 0;
  border-top: 1px solid rgba(215, 226, 238, 0.8);
}

.schedule-item:first-child {
  padding-top: 16px;
}

.schedule-item__place,
.schedule-card__place {
  color: var(--muted);
  font-weight: 700;
}

.card--notice,
.card--soft {
  overflow: hidden;
}

.quick-links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.quick-links__item {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 64px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 8px 18px rgba(23, 50, 77, 0.05);
  color: var(--text);
  font-weight: 700;
  text-align: center;
}

.quick-links__item:hover {
  text-decoration: none;
  border-color: rgba(31, 95, 168, 0.35);
  background: rgba(31, 95, 168, 0.05);
}

.content-card h3,
.news-card h3,
.schedule-card h3,
.meeting-card h3,
.archive-entry h3,
.timeline-entry h3,
.notice-item h3,
.schedule-item h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  line-height: 1.45;
}

.plain-list {
  margin: 0;
  padding-left: 1.2em;
}

.plain-list--ordered {
  padding-left: 1.3em;
}

.content-card p,
.news-card p,
.schedule-card p,
.meeting-card p {
  margin: 0 0 12px;
}

.content-card p:last-child,
.news-card p:last-child,
.schedule-card p:last-child,
.meeting-card p:last-child {
  margin-bottom: 0;
}

.news-card__meta,
.schedule-card__head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  color: var(--muted);
}

.news-card__link {
  font-weight: 700;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.badge--alert {
  background: #fde7e5;
  color: #af352a;
}

.badge--info {
  background: #e7f1fb;
  color: #184f8c;
}

.badge--planned {
  background: #edf4ff;
  color: #1f5fa8;
}

.badge--progress {
  background: #fff5d9;
  color: #8b6400;
}

.badge--done {
  background: #e6f3ea;
  color: #246a3f;
}

.archive-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.archive-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.archive-groups,
.timeline {
  display: grid;
  gap: 14px;
}

.archive-group,
.timeline-group {
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.archive-group > summary,
.timeline-group > summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 22px;
  font-weight: 700;
  color: var(--primary-dark);
}

.archive-group > summary::-webkit-details-marker,
.timeline-group > summary::-webkit-details-marker {
  display: none;
}

.archive-group__body,
.timeline-group__body {
  padding: 0 22px 22px;
  border-top: 1px solid rgba(215, 226, 238, 0.8);
}

.archive-entry,
.timeline-entry {
  padding: 18px 0;
  border-top: 1px solid rgba(215, 226, 238, 0.8);
}

.archive-entry:first-child,
.timeline-entry:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-hero__aside {
  padding: 22px;
}

.contact-panel {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding: 24px;
}

.contact-panel__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.site-footer {
  margin-top: 14px;
  background: #153a62;
  color: rgba(255, 255, 255, 0.92);
}

.site-footer a {
  color: #fff;
}

.site-footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
}

.site-footer__name {
  margin: 0 0 6px;
  font-size: 1.08rem;
  font-weight: 700;
}

.site-footer__links {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}

.site-footer__copy {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.92rem;
}

.site-footer__copy p {
  margin: 0;
  padding: 14px 0 16px;
  color: rgba(255, 255, 255, 0.8);
}

.page-content,
.post-content {
  padding: 24px;
}

.featured-image {
  margin-bottom: 18px;
  border-radius: 14px;
}

.archive-pagination {
  margin-top: 24px;
}

.post-navigation {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 18px;
}

.post-navigation a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
}

.page-links {
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 960px) {
  .hero__inner,
  .page-hero__inner,
  .info-grid,
  .content-grid,
  .meeting-grid,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .contact-panel {
    align-items: flex-start;
  }

  .quick-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .site-header__inner,
  .site-footer__inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  body {
    font-size: 15px;
    line-height: 1.74;
  }

  .container {
    width: min(calc(100% - 20px), var(--container));
  }

  .site-topbar {
    display: none;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    box-shadow: 0 10px 20px rgba(23, 50, 77, 0.05);
  }

  .site-header__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
    padding: 10px 0 8px;
    align-items: center;
  }

  .site-brand__eyebrow,
  .site-brand__lead {
    display: none;
  }

  .site-brand__name {
    font-size: 1.18rem;
    line-height: 1.25;
  }

  .site-header__actions {
    display: none;
  }

  .site-nav {
    border-top: 0;
  }

  .site-nav__inner {
    padding: 0;
    justify-content: flex-end;
  }

  .nav-toggle {
    position: fixed;
    top: 12px;
    right: 12px;
    z-index: 60;
    width: 44px;
    height: 44px;
    padding: 10px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(10px);
  }

  .global-nav {
    top: 68px;
    left: 10px;
    right: 10px;
    width: auto;
    max-height: calc(100vh - 84px);
    transform: translateY(-8px);
  }

  .global-nav__list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .global-nav__list a {
    justify-content: flex-start;
    width: 100%;
    min-height: 40px;
    padding: 0 12px;
    font-size: 0.95rem;
  }

  .hero,
  .page-hero,
  .section {
    padding-top: 18px;
  }

  .quick-links {
    grid-template-columns: 1fr;
  }

  .info-card,
  .content-card,
  .news-card,
  .schedule-card,
  .meeting-card,
  .page-hero__aside,
  .contact-panel,
  .hero__contact,
  .page-content,
  .post-content {
    padding: 18px;
  }

  .archive-group > summary,
  .timeline-group > summary,
  .archive-group__body,
  .timeline-group__body {
    padding-left: 16px;
    padding-right: 16px;
  }

  .contact-number {
    font-size: 1.4rem;
  }

  .hero__title,
  .page-hero__title {
    font-size: clamp(1.72rem, 1.35rem + 2vw, 2.35rem);
  }

  .section-head__title {
    font-size: clamp(1.15rem, 1rem + 1vw, 1.55rem);
    scroll-margin-top: 100px;
  }

  html {
    scroll-padding-top: 100px;
  }

  .content-card h3,
  .news-card h3,
  .schedule-card h3,
  .meeting-card h3,
  .archive-entry h3,
  .timeline-entry h3,
  .notice-item h3,
  .schedule-item h3 {
    font-size: 1rem;
  }

  .button {
    min-height: 42px;
    padding: 0 14px;
    font-size: 0.95rem;
  }

  .quick-links__item {
    min-height: 54px;
    font-size: 0.95rem;
  }

  .post-navigation {
    flex-direction: column;
  }
}