/* ============================================
   神奈川県立相模原高等学校 同窓会
   同窓会概要ページ専用スタイル
   ============================================ */

/* ============================================
   PAGE LAYOUT
   ============================================ */
.overview-page {
  padding-top: 0;
}

/* ============================================
   HERO SECTION
   ============================================ */
.overview-hero {
  position: relative;
  padding: 120px 0 50px;
  background: linear-gradient(135deg, #FAF7F2 0%, #F2EBDB 100%);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0;
}

.overview-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('../image/hero.png') no-repeat center / cover;
  opacity: 0.15;
  z-index: 0;
}

.overview-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(255, 252, 247, 0.15), rgba(242, 235, 219, 0.40));
  z-index: 1;
}

.overview-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.overview-hero-title {
  font-family: var(--font-serif);
  font-size: clamp(48px, 5.2vw, 64px);
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.14em;
  line-height: 1.2;
  margin-bottom: 18px;
}

.overview-hero-underline {
  display: block;
  width: 60px;
  height: 2px;
  margin: 0 auto 16px;
  background: var(--color-gold);
}

.overview-hero-sub {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-navy);
  letter-spacing: 0.12em;
}

/* ============================================
   MAIN CONTENT AREA - 2 Column
   ============================================ */
.overview-inner {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 48px;
  padding: 30px 0 100px;
  align-items: start;
}

/* ============================================
   LEFT SIDEBAR NAVIGATION
   ============================================ */
.overview-side-nav {
  background: #F5EFE0;
  border: 1px solid var(--color-border-soft);
  border-radius: 6px;
  padding: 22px 18px;
  position: sticky;
  top: 96px;
}

.overview-side-nav-title {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.08em;
  text-align: center;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(15, 42, 68, 0.15);
}

.overview-side-nav-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  list-style: none;
}

.overview-side-nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 13px 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-navy);
  border-radius: 4px;
  transition: background-color 0.25s ease, color 0.25s ease;
  min-height: 44px;
  border: 1px solid transparent;
}

.overview-side-nav-item img {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  opacity: 0.8;
  transition: opacity 0.25s ease;
}

.overview-side-nav-item:hover,
.overview-side-nav-item:focus-visible {
  background: rgba(15, 42, 68, 0.05);
  border-color: rgba(15, 42, 68, 0.12);
}

.overview-side-nav-item.is-active {
  background: var(--color-navy);
  color: #FFFCF7;
  border-color: var(--color-navy);
  font-weight: 600;
}

.overview-side-nav-item.is-active img {
  filter: brightness(0) invert(1);
  opacity: 1;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
.overview-main {
  min-width: 0;
}

/* ============================================
   GREETING SECTION
   ============================================ */
.greeting-section {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 44px;
  margin-bottom: 72px;
  align-items: start;
}

.greeting-photo {
  text-align: center;
}

.greeting-photo img {
  width: 100%;
  max-width: 280px;
  height: auto;
  margin-bottom: 16px;
  border-radius: 4px;
  box-shadow: 0 8px 24px rgba(15, 42, 68, 0.08);
}

.greeting-photo-credit {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  font-weight: 500;
}

.greeting-text {
  padding-top: 8px;
}

.greeting-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}

.greeting-heading-main {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.4vw, 28px);
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.08em;
}

.greeting-heading-underline {
  height: 2px;
  width: 40px;
  background: var(--color-gold);
}

.greeting-body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.95;
  color: var(--color-text-base);
  margin-bottom: 32px;
}

.greeting-credit {
  text-align: right;
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

.greeting-president {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.greeting-president-term {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ============================================
   SECTION DIVIDER
   ============================================ */
.section-divider {
  height: 1px;
  background: var(--color-border-soft);
  margin: 64px 0 56px;
}

/* ============================================
   OFFICERS SECTION
   ============================================ */
.officers-heading {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.4vw, 26px);
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.08em;
  margin-bottom: 36px;
  position: relative;
  padding-bottom: 18px;
}

.officers-heading::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-border-soft);
}

.officers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px 32px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: 6px;
  padding: 32px 36px;
  margin-bottom: 0;
}

.officer-card {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border-soft);
}

.officer-card:nth-child(even) {
  border-right: 1px solid var(--color-border-soft);
  padding-right: 32px;
}

.officer-card:nth-child(4n+3),
.officer-card:nth-child(4n) {
  border-bottom: none;
}

.officer-position {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.officer-name {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.officer-year {
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

/* ============================================
   HISTORY SECTION
   ============================================ */
.history-heading {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.4vw, 26px);
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.08em;
  margin-top: 64px;
  margin-bottom: 36px;
  position: relative;
  padding-bottom: 18px;
}

.history-heading::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-border-soft);
}

/* Timeline container removed to use style.css */

/* ============================================
   BYLAWS SECTION
   ============================================ */
.bylaws-heading {
  font-family: var(--font-serif);
  font-size: clamp(22px, 2.4vw, 26px);
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.08em;
  margin-top: 64px;
  margin-bottom: 28px;
  position: relative;
  padding-bottom: 18px;
}

.bylaws-heading::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: var(--color-border-soft);
}

.accordion {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.accordion-item {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-soft);
  border-radius: 4px;
  overflow: hidden;
}

.accordion-trigger {
  width: 100%;
  padding: 18px 24px;
  background: #F5EFE0;
  border: none;
  border-bottom: 1px solid var(--color-border-soft);
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-navy);
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  letter-spacing: 0.06em;
  transition: background-color 0.25s ease;
}

.accordion-trigger:hover {
  background: #F0E8D8;
}

.accordion-trigger img {
  width: 16px;
  height: 16px;
  transition: transform 0.25s ease;
}

.accordion-trigger.is-open img {
  transform: rotate(180deg);
}

.accordion-panel {
  display: none;
  padding: 24px;
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text-base);
}

.accordion-panel.is-open {
  display: block;
}

.accordion-panel p {
  margin-bottom: 14px;
}

.accordion-panel p:last-child {
  margin-bottom: 0;
}

/* Bylaws link */
.bylaws-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 28px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-navy);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.25s ease;
}

.bylaws-link:hover {
  color: var(--color-gold);
}

.bylaws-link img {
  width: 16px;
  height: 16px;
}

/* ============================================
   FOOTER
   ============================================ */
.overview-footer {
  background: var(--color-bg-base);
  padding: 48px 0 32px;
  margin-top: 80px;
  border-top: 1px solid var(--color-border-soft);
}

.overview-footer-content {
  text-align: center;
}

.overview-footer-title {
  font-family: var(--font-serif);
  font-size: clamp(18px, 2vw, 24px);
  font-weight: 600;
  color: var(--color-navy);
  letter-spacing: 0.10em;
  margin-bottom: 20px;
}

.overview-footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 22px;
}

.overview-footer-nav a {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-navy);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color 0.25s ease;
  position: relative;
}

.overview-footer-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width 0.25s ease;
}

.overview-footer-nav a:hover {
  color: var(--color-gold);
}

.overview-footer-nav a:hover::after {
  width: 100%;
}

.overview-footer-info {
  font-family: var(--font-sans);
  font-size: 12.5px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  margin-bottom: 18px;
}

.overview-footer-copyright {
  font-family: var(--font-sans);
  font-size: 11px;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
}

/* ============================================
   RESPONSIVE - Tablet (≤1023px)
   ============================================ */
@media (max-width: 1023px) {
  .overview-hero {
    height: 240px;
  }

  .overview-hero-title {
    font-size: 44px;
  }

  .overview-inner {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 40px 0 60px;
  }

  .overview-side-nav {
    position: static;
  }

  .greeting-section {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 32px;
  }

  .officers-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .officer-card {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 16px 0;
    border-right: none !important;
  }

  .officer-card:nth-child(n) {
    border-bottom: 1px solid var(--color-border-soft) !important;
  }

  /* Responsive timeline removed to use style.css */
}

/* ============================================
   RESPONSIVE - Mobile (≤767px)
   ============================================ */
@media (max-width: 767px) {
  .overview-page {
    padding-top: 0;
  }

  .overview-hero {
    height: 180px;
    margin-bottom: 32px;
  }

  .overview-hero-title {
    font-size: 32px;
  }

  .overview-hero-underline {
    width: 40px;
  }

  .greeting-section {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-bottom: 48px;
  }

  .greeting-photo img {
    max-width: 100%;
  }

  .greeting-body {
    font-size: 13.5px;
    line-height: 1.85;
  }

  .section-divider {
    margin: 48px 0 40px;
  }

  .officers-grid {
    padding: 20px 18px;
  }

  .officer-card {
    padding: 14px 0;
  }

  .officer-name {
    font-size: 16px;
  }

  /* Mobile timeline removed to use style.css */

  .accordion-trigger {
    padding: 16px 18px;
    font-size: 14px;
  }

  .accordion-panel {
    padding: 18px;
    font-size: 13.5px;
  }

  .overview-footer-nav {
    gap: 12px 16px;
  }
}