/* ========================================
   東京都立大学 応化同窓会
   レスポンシブスタイルシート
   ======================================== */

/* --- リセット・ベース --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-primary: #4366b0;
  --color-primary-light: #5a80cc;
  --color-primary-dark: #2e4a82;
  --color-accent: #2ea87e;
  --color-accent-light: #5cc9a0;
  --color-text: #333;
  --color-text-light: #666;
  --color-bg: #fff;
  --color-bg-alt: #f4f5f6;
  --color-border: #dde1e6;
  --font-main: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Meiryo", sans-serif;
  --max-width: 1100px;
  --header-height: 72px;
}

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

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover {
  color: var(--color-accent);
}

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- ヘッダー --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background: #fff;
  color: var(--color-text);
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
  border-bottom: 3px solid var(--color-primary);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.logo a {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--color-primary-dark);
  text-decoration: none;
}
.logo a:hover {
  opacity: 0.85;
  color: var(--color-primary-dark);
}

.logo-img {
  height: 48px;
  width: auto;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}
.logo-main {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 2px;
}

/* ハンバーガーメニュー */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 110;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ナビゲーション */
.main-nav ul {
  display: flex;
  list-style: none;
  gap: 4px;
}
.main-nav a {
  display: block;
  padding: 8px 14px;
  color: var(--color-text);
  font-size: 16px;
  font-weight: 500;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
}
.main-nav a:hover,
.main-nav a.active {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* --- ヒーロー --- */
.hero {
  position: relative;
  background: url('../images/hero.png') center / cover no-repeat;
  color: #fff;
  padding: 80px 0 100px;
  text-align: center;
  overflow: hidden;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(46, 74, 130, 0.65);
}
.hero-content {
  position: relative;
}
.hero h1 {
  font-size: 2.4rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.hero p {
  font-size: 1.1rem;
  opacity: 0.85;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- ボタン --- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 6px;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s;
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-accent-light);
  color: #fff;
  box-shadow: 0 4px 12px rgba(200,168,78,0.3);
}
.btn-outline {
  border-color: rgba(255,255,255,0.5);
  color: #fff;
  background: transparent;
}
.btn-outline:hover {
  border-color: #fff;
  background: rgba(255,255,255,0.1);
  color: #fff;
}
.btn-secondary {
  background: transparent;
  color: var(--color-primary-light);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-primary-light);
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* --- セクション共通 --- */
.section {
  padding: 64px 0;
}
.section-alt {
  background: var(--color-bg-alt);
}
.section-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--color-accent);
  display: inline-block;
}
.section-more {
  margin-top: 32px;
  text-align: center;
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* --- お知らせ --- */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--color-border);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
}
.news-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  background: #fff;
  transition: background 0.2s;
}
.news-item:hover {
  background: var(--color-bg-alt);
}
.news-item time {
  font-size: 13px;
  color: var(--color-text-light);
  white-space: nowrap;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.news-tag {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 3px;
  white-space: nowrap;
  flex-shrink: 0;
}
.tag-important {
  background: #d32f2f;
  color: #fff;
}
.tag-event {
  background: var(--color-primary-light);
  color: #fff;
}
.tag-info {
  background: var(--color-accent);
  color: #fff;
}
.news-item a {
  color: var(--color-text);
  font-weight: 500;
}
.news-item a:hover {
  color: var(--color-primary-light);
}

/* --- カードグリッド（同窓会案内） --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 32px 20px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  transition: box-shadow 0.2s, transform 0.2s;
  color: var(--color-text);
}
.card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  transform: translateY(-2px);
  color: var(--color-text);
}
.card-icon {
  font-size: 2.4rem;
  margin-bottom: 12px;
}
.card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}
.card p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* --- 活動報告 --- */
.activity-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.activity-card {
  display: block;
  background: #fff;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: box-shadow 0.2s, transform 0.2s;
  color: var(--color-text);
  text-decoration: none;
}
.activity-card:hover {
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  transform: translateY(-2px);
  color: var(--color-text);
}
.activity-img {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.activity-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.activity-img-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.6;
}
.activity-body {
  padding: 20px;
}
.activity-body time {
  font-size: 12px;
  color: var(--color-text-light);
}
.activity-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 6px 0 8px;
}
.activity-body p {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* --- 会員便り --- */
.member-posts {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.member-post {
  background: #fff;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  padding: 24px;
}
.member-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.member-year {
  font-size: 12px;
  font-weight: 700;
  background: var(--color-primary);
  color: #fff;
  padding: 2px 10px;
  border-radius: 3px;
}
.member-meta time {
  font-size: 12px;
  color: var(--color-text-light);
}
.member-post h3 {
  font-size: 1rem;
  margin-bottom: 8px;
}
.member-post h3 a {
  color: var(--color-text);
  font-weight: 700;
}
.member-post h3 a:hover {
  color: var(--color-primary-light);
}
.member-post p {
  font-size: 14px;
  color: var(--color-text-light);
}

/* --- リンク --- */
.link-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.link-card {
  display: flex;
  flex-direction: column;
  padding: 20px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  transition: border-color 0.2s, box-shadow 0.2s;
  color: var(--color-text);
}
.link-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  color: var(--color-primary);
}
.link-card strong {
  font-size: 14px;
  color: var(--color-primary);
  margin-bottom: 4px;
}
.link-card span {
  font-size: 12px;
  color: var(--color-text-light);
}

/* --- フッター --- */
.site-footer {
  background: #1a2d52;
  color: rgba(255,255,255,0.7);
  padding: 40px 0 24px;
  font-size: 13px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 24px;
}
.footer-name {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.footer-address {
  line-height: 1.7;
}
.footer-links {
  display: flex;
  gap: 20px;
}
.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
}
.footer-links a:hover {
  color: var(--color-accent-light);
}
.footer-copy {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 12px;
  color: rgba(255,255,255,0.4);
}

/* --- サブページ共通 --- */
.page-content {
  padding-top: 48px;
  padding-bottom: 64px;
}
.page-title {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 32px;
  padding-bottom: 12px;
  border-bottom: 3px solid var(--color-accent);
}

/* --- お知らせ記事 --- */
.news-article {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 40px;
  margin-bottom: 32px;
}
.news-article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-light);
}
.news-article-body p {
  margin-bottom: 16px;
  line-height: 2;
}
.news-article-body h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin: 24px 0 8px;
}
.news-article-detail {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 20px;
  margin: 16px 0;
  padding: 16px 20px;
  background: var(--color-bg-alt);
  border-radius: 6px;
}
.news-article-detail dt {
  font-weight: 700;
  color: var(--color-primary-dark);
  white-space: nowrap;
}
.news-article-detail dd {
  margin: 0;
}
.news-article-speakers {
  margin: 16px 0;
  padding: 16px 20px;
  background: var(--color-bg-alt);
  border-radius: 6px;
}
.news-article-speakers h3 {
  margin: 0 0 8px;
}
.news-article-speakers ol {
  padding-left: 24px;
  line-height: 2;
}
.news-article-speakers li {
  margin-bottom: 8px;
}
.news-article-photo {
  margin: 24px 0;
  text-align: center;
}
.news-article-photo img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--color-border);
}
.news-article-photo figcaption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--color-text-light);
}
.news-article-author {
  font-weight: 600;
  color: var(--color-text);
}
.news-article-body h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 12px 0 4px;
}
.news-article-subsection {
  margin-left: 20px;
  margin-bottom: 8px;
}
.news-article-subsection p {
  margin-left: 16px;
}
.news-article-subsection .news-article-speakers {
  margin-left: 16px;
}
.news-article-divider {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 24px 0;
}
.news-article-sign {
  text-align: right;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-top: 24px;
  font-size: 1.05rem;
}

@media (max-width: 640px) {
  .news-article {
    padding: 24px 16px;
  }
  .news-article-detail {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .news-article-detail dt {
    margin-top: 8px;
  }
}

/* --- 会員だより --- */
.dayori-article {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 40px;
  margin-bottom: 32px;
}
.dayori-title {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.dayori-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-light);
}
.dayori-author {
  font-weight: 600;
}
.dayori-body p {
  margin-bottom: 16px;
  line-height: 2;
}
.dayori-photo {
  margin: 24px 0;
  text-align: center;
}
.dayori-photo img {
  max-width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--color-border);
}
.dayori-info {
  margin-top: 24px;
  padding: 24px;
  background: var(--color-bg-alt);
  border-radius: 6px;
}
.dayori-info dl {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px 20px;
}
.dayori-info dt {
  font-weight: 700;
  color: var(--color-primary-dark);
  white-space: nowrap;
}
.dayori-info dd {
  margin: 0;
}
.dayori-info ul {
  list-style: none;
  padding: 0;
}
.dayori-info ul li {
  margin-bottom: 2px;
}
.dayori-contact {
  margin-top: 24px;
  font-size: 14px;
  color: var(--color-text-light);
}

@media (max-width: 640px) {
  .dayori-article {
    padding: 24px 16px;
  }
  .dayori-info dl {
    grid-template-columns: 1fr;
    gap: 4px;
  }
  .dayori-info dt {
    margin-top: 8px;
  }
}

/* --- 挨拶 --- */
.greeting {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 40px;
  margin-bottom: 32px;
}
.greeting-heading {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
}
.greeting-body p {
  margin-bottom: 16px;
  line-height: 2;
}
.greeting-list {
  margin: 8px 0 16px 24px;
  line-height: 2;
}
.greeting-list li {
  margin-bottom: 4px;
}
.greeting-name {
  text-align: right;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-top: 24px;
  font-size: 1.05rem;
}

@media (max-width: 640px) {
  .greeting {
    padding: 24px 16px;
  }
}

/* --- リンク先一覧 --- */
.link-section {
  margin-bottom: 32px;
}
.link-category {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  padding: 8px 16px;
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 4px 4px 0;
}
.link-list {
  list-style: none;
  padding: 0;
}
.link-list li {
  border-bottom: 1px solid var(--color-border);
}
.link-list li:last-child {
  border-bottom: none;
}
.link-list a {
  display: block;
  padding: 14px 20px;
  color: var(--color-text);
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
}
.link-list a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* --- 規約 --- */
.kaisoku {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 40px;
}
.kaisoku-preamble {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  line-height: 2;
}
.kaisoku-chapter {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: 32px 0 16px;
  padding: 8px 16px;
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 4px 4px 0;
}
.kaisoku-article {
  margin-bottom: 24px;
  padding-left: 8px;
}
.kaisoku-article h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}
.kaisoku-article p {
  margin-bottom: 8px;
  line-height: 1.9;
}
.kaisoku-article ol {
  padding-left: 24px;
  margin-bottom: 8px;
  line-height: 2;
}
.kaisoku-article ol li {
  margin-bottom: 4px;
}
.kaisoku-sub {
  margin-top: 4px;
  list-style-type: none;
  padding-left: 16px;
}
.kaisoku-sub li::before {
  content: "— ";
  color: var(--color-text-light);
}
.kaisoku-appendix {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}
.kaisoku-appendix h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 4px;
}
.kaisoku-appendix p {
  line-height: 1.9;
}

@media (max-width: 640px) {
  .kaisoku {
    padding: 24px 16px;
  }
  .kaisoku-chapter {
    font-size: 1.05rem;
  }
}

/* --- 役員名簿テーブル --- */
.yakuin-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  overflow: hidden;
  font-size: 15px;
}
.yakuin-table thead {
  background: var(--color-primary);
  color: #fff;
}
.yakuin-table th {
  padding: 14px 20px;
  font-weight: 700;
  text-align: left;
  font-size: 14px;
  letter-spacing: 1px;
}
.yakuin-table td {
  padding: 12px 20px;
  border-bottom: 1px solid var(--color-border);
  vertical-align: top;
}
.yakuin-table tbody tr:last-child td {
  border-bottom: none;
}
.yakuin-table .col-role {
  font-weight: 600;
  color: var(--color-primary);
  white-space: nowrap;
}
.yakuin-table .col-year {
  white-space: nowrap;
  color: var(--color-text-light);
  font-size: 14px;
}

@media (max-width: 640px) {
  .yakuin-table {
    font-size: 13px;
  }
  .yakuin-table th,
  .yakuin-table td {
    padding: 10px 12px;
  }
}

/* --- サイトマップ --- */
.sitemap-tree ul {
  list-style: none;
  padding-left: 0;
}
.sitemap-tree > ul > li {
  border-bottom: 1px solid var(--color-border);
}
.sitemap-tree > ul > li:last-child {
  border-bottom: none;
}
.sitemap-tree > ul > li > a {
  display: block;
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  transition: background 0.2s, color 0.2s;
}
.sitemap-tree > ul > li > a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}
.sitemap-tree ul ul {
  padding-left: 24px;
  border-top: 1px solid var(--color-border);
}
.sitemap-tree ul ul li a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--color-text-light);
  transition: background 0.2s, color 0.2s;
}
.sitemap-tree ul ul li a::before {
  content: "└ ";
  color: var(--color-border);
  margin-right: 4px;
}
.sitemap-tree ul ul li a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}

/* ========================================
   レスポンシブ
   ======================================== */

/* タブレット */
@media (max-width: 900px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .activity-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .link-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero h1 {
    font-size: 2rem;
  }

  /* タブレットでもハンバーガーメニュー表示 */
  .menu-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    background: #1a2d52;
    padding: 80px 24px 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 105;
    box-shadow: -4px 0 16px rgba(0,0,0,0.3);
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }
  .main-nav a {
    color: #fff;
    padding: 18px 20px;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 1px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    border-radius: 0;
  }
  .main-nav a:hover,
  .main-nav a.active {
    background: rgba(255,255,255,0.15);
    color: #fff;
  }
}

/* モバイル */
@media (max-width: 640px) {
  :root {
    --header-height: 60px;
  }

  /* モバイルナビ */
  .menu-toggle {
    display: flex;
  }

  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 280px;
    height: 100vh;
    background: #1a2d52;
    padding: 80px 24px 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 105;
    box-shadow: -4px 0 16px rgba(0,0,0,0.3);
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .main-nav ul {
    flex-direction: column;
    gap: 0;
  }
  .main-nav a {
    color: #fff;
    padding: 18px 20px;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 1px;
    border-bottom: 1px solid rgba(255,255,255,0.2);
    border-radius: 0;
  }
  .main-nav a:hover,
  .main-nav a.active {
    background: rgba(255,255,255,0.15);
    color: #fff;
  }

  .logo-main {
    font-size: 13px;
    letter-spacing: 1px;
  }
  .logo-img {
    height: 36px;
  }

  /* ヒーロー */
  .hero {
    padding: 56px 0 72px;
  }
  .hero h1 {
    font-size: 1.5rem;
    letter-spacing: 1px;
  }
  .hero p {
    font-size: 0.95rem;
  }

  /* セクション */
  .section {
    padding: 48px 0;
  }
  .section-title {
    font-size: 1.3rem;
  }

  /* お知らせ */
  .news-item {
    flex-wrap: wrap;
    padding: 14px 16px;
    gap: 6px;
  }
  .news-item a {
    flex-basis: 100%;
    font-size: 14px;
  }

  /* カード */
  .card-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .card {
    padding: 20px 12px;
  }

  /* 活動報告 */
  .activity-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* リンク */
  .link-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  /* フッター */
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
  }
}

/* モバイルオーバーレイ */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}
.nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* --- Cookie同意バナー --- */
.cookie-consent {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 110;
  background: var(--color-bg);
  border-top: 2px solid var(--color-border);
  box-shadow: 0 -2px 12px rgba(0,0,0,0.08);
  padding: 20px 24px;
  display: none;
}
.cookie-consent.is-visible {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.cookie-consent__text {
  flex: 1 1 400px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text);
}
.cookie-consent__text a {
  color: var(--color-primary-light);
  text-decoration: underline;
}
.cookie-consent__actions {
  display: flex;
  gap: 12px;
  flex-shrink: 0;
}
.cookie-consent__actions .btn {
  font-size: 13px;
  padding: 10px 20px;
  white-space: nowrap;
}
@media (max-width: 600px) {
  .cookie-consent {
    flex-direction: column;
    text-align: center;
    gap: 12px;
    padding: 16px;
  }
  .cookie-consent__text {
    flex-basis: auto;
    font-size: 13px;
  }
  .cookie-consent__actions {
    width: 100%;
    justify-content: center;
  }
}

/* --- お問い合わせフォーム --- */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
}
.form-group {
  margin-bottom: 24px;
}
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}
.form-label .required {
  color: #d32f2f;
  font-size: 12px;
  margin-left: 4px;
}
.form-control {
  display: block;
  width: 100%;
  padding: 10px 14px;
  font-size: 15px;
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}
.form-control:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(67,102,176,0.15);
}
.form-control.is-invalid {
  border-color: #d32f2f;
}
textarea.form-control {
  min-height: 160px;
  resize: vertical;
}
.form-error {
  font-size: 13px;
  color: #d32f2f;
  margin-top: 4px;
  display: none;
}
.form-error.is-visible {
  display: block;
}
.form-submit {
  text-align: center;
  margin-top: 32px;
}
.form-submit .btn {
  min-width: 200px;
}
.form-success {
  text-align: center;
  padding: 48px 24px;
}
.form-success__icon {
  font-size: 48px;
  color: var(--color-accent);
  margin-bottom: 16px;
}
.form-success__heading {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}
.form-success__text {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
}
.form-alert {
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 14px;
  margin-bottom: 20px;
  display: none;
}
.form-alert.is-visible {
  display: block;
}
.form-alert--error {
  background: #fdecea;
  color: #611a15;
  border: 1px solid #f5c6cb;
}

/* --- ファイル入力 --- */
.form-file {
  position: relative;
}
.form-file input[type="file"] {
  display: block;
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px dashed var(--color-border);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.2s;
  box-sizing: border-box;
}
.form-file input[type="file"]:hover,
.form-file input[type="file"]:focus {
  border-color: var(--color-primary-light);
  outline: none;
}
.form-file__hint {
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 4px;
}
.form-file__preview {
  margin-top: 12px;
  display: none;
}
.form-file__preview.is-visible {
  display: block;
}
.form-file__preview img {
  max-width: 320px;
  max-height: 240px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
}
@media (max-width: 600px) {
  .form-file__preview img {
    max-width: 100%;
  }
}