/*
Theme Name: 千代田町会
Theme URI: https://example.com/
Author: Chiyoda Chokai
Description: 東京都中野区・千代田町会の公式ウェブサイト用テーマ。町名の由来である「神田川のホタル」をモチーフに、高齢の会員の方にも読みやすいUDフォント・高コントラスト設計で制作。
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: chiyoda-chokai
*/

/* ============================================================
   デザイントークン
   ============================================================ */
:root{
  --night:#16203a;        /* 夜の神田川 */
  --night-2:#23304f;
  --firefly:#f2b134;      /* ホタルの光 */
  --firefly-soft:#ffd97a;
  --river:#3f7d77;        /* 川面の緑青 */
  --river-deep:#2c5a55;
  --paper:#faf6ec;        /* 和紙 */
  --paper-2:#f3ecdc;
  --ink:#2a2620;
  --ink-soft:#5a544a;
  --line:#ddd2bc;
  --white:#ffffff;
  --maxw:1080px;
  --radius:14px;
  --shadow:0 10px 30px rgba(22,32,58,.10);
  --shadow-sm:0 4px 14px rgba(22,32,58,.08);
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"BIZ UDPGothic","Hiragino Sans","Yu Gothic",sans-serif;
  color:var(--ink);
  background:var(--paper);
  font-size:17px;
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:var(--river-deep);text-underline-offset:.2em;}
a:hover{color:var(--firefly);}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px;}

/* 見出し用の明朝 */
.mincho{font-family:"Shippori Mincho B1","Yu Mincho","Hiragino Mincho ProN",serif;}

/* ============================================================
   ヘッダー
   ============================================================ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(250,246,236,.92);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:14px 22px;max-width:var(--maxw);margin:0 auto;
}
.brand{display:flex;align-items:center;gap:13px;text-decoration:none;}
.brand-mark{
  width:48px;height:48px;border-radius:50%;flex:none;
  background:radial-gradient(circle at 50% 42%, var(--firefly-soft), var(--firefly) 38%, var(--river-deep) 72%, var(--night));
  box-shadow:0 0 0 3px rgba(242,177,52,.18), var(--shadow-sm);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:0;border-radius:50%;
  background:radial-gradient(circle at 62% 30%, rgba(255,255,255,.9), transparent 22%);
}
.brand-text{line-height:1.25;}
.brand-text .jp{font-size:1.32rem;font-weight:700;color:var(--night);letter-spacing:.04em;}
.brand-text .sub{font-size:.72rem;color:var(--ink-soft);letter-spacing:.18em;}

.nav-toggle{
  display:none;border:1px solid var(--line);background:var(--white);
  border-radius:10px;padding:9px 12px;font-size:.95rem;cursor:pointer;color:var(--night);
}
.main-nav ul{list-style:none;display:flex;gap:6px;margin:0;padding:0;}
.main-nav a{
  display:block;text-decoration:none;color:var(--night);font-weight:700;
  padding:9px 14px;border-radius:10px;font-size:.98rem;transition:.2s;
}
.main-nav a:hover{background:var(--paper-2);color:var(--river-deep);}

/* ============================================================
   ヒーロー（夜の神田川とホタル）
   ============================================================ */
.hero{
  position:relative;overflow:hidden;color:#fdf8ea;
  background:
    radial-gradient(120% 80% at 80% -10%, rgba(242,177,52,.20), transparent 50%),
    linear-gradient(180deg, var(--night) 0%, var(--night-2) 60%, var(--river-deep) 140%);
}
.hero-inner{max-width:var(--maxw);margin:0 auto;padding:88px 22px 96px;position:relative;z-index:3;}
.hero .eyebrow{
  display:inline-block;letter-spacing:.32em;font-size:.74rem;color:var(--firefly-soft);
  border:1px solid rgba(242,177,52,.45);border-radius:999px;padding:6px 16px;margin-bottom:24px;
}
.hero h1{
  margin:0 0 18px;font-weight:800;letter-spacing:.06em;line-height:1.3;
  font-size:clamp(2.1rem,6vw,3.5rem);text-shadow:0 2px 18px rgba(0,0,0,.35);
}
.hero h1 .glow{color:var(--firefly-soft);text-shadow:0 0 22px rgba(242,177,52,.55);}
.hero p.lead{
  max-width:36em;margin:0 0 30px;font-size:1.06rem;line-height:2;color:#ece4d2;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;}
.btn{
  display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:700;
  padding:13px 24px;border-radius:999px;transition:.22s;font-size:1rem;
}
.btn-primary{background:var(--firefly);color:var(--night);box-shadow:0 8px 22px rgba(242,177,52,.32);}
.btn-primary:hover{background:var(--firefly-soft);color:var(--night);transform:translateY(-2px);}
.btn-ghost{border:1.5px solid rgba(253,248,234,.5);color:#fdf8ea;}
.btn-ghost:hover{border-color:var(--firefly-soft);color:var(--firefly-soft);}

/* 川面 */
.hero-river{
  position:absolute;left:0;right:0;bottom:0;height:120px;z-index:2;
  background:linear-gradient(180deg, transparent, rgba(63,125,119,.55));
}
/* ホタル */
.firefly{position:absolute;width:7px;height:7px;border-radius:50%;background:var(--firefly-soft);
  box-shadow:0 0 10px 3px rgba(242,177,52,.8);opacity:0;z-index:1;animation:float 7s ease-in-out infinite;}
@keyframes float{
  0%{transform:translateY(20px) translateX(0);opacity:0;}
  20%{opacity:1;}
  50%{transform:translateY(-30px) translateX(14px);opacity:.95;}
  80%{opacity:.6;}
  100%{transform:translateY(-70px) translateX(-8px);opacity:0;}
}

/* ============================================================
   セクション共通
   ============================================================ */
.section{padding:74px 0;}
.section.alt{background:var(--paper-2);}
.section-head{margin-bottom:38px;}
.section-head .kicker{
  display:inline-block;font-size:.78rem;letter-spacing:.28em;color:var(--river-deep);
  font-weight:700;margin-bottom:10px;
}
.section-head h2{
  margin:0;font-size:clamp(1.6rem,4vw,2.2rem);color:var(--night);letter-spacing:.05em;
  position:relative;padding-bottom:16px;font-weight:800;
}
.section-head h2::after{
  content:"";position:absolute;left:0;bottom:0;width:62px;height:4px;border-radius:4px;
  background:linear-gradient(90deg,var(--firefly),var(--river));
}

/* 由来 */
.origin{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;}
.origin p{margin:0 0 18px;font-size:1.06rem;}
.origin .firefly-card{
  background:linear-gradient(160deg,var(--night),var(--river-deep));
  color:#fdf8ea;border-radius:var(--radius);padding:36px 30px;box-shadow:var(--shadow);
  position:relative;overflow:hidden;
}
.origin .firefly-card::before{
  content:"";position:absolute;width:160px;height:160px;border-radius:50%;top:-50px;right:-40px;
  background:radial-gradient(circle, rgba(242,177,52,.35), transparent 70%);
}
.origin .firefly-card .label{letter-spacing:.28em;font-size:.72rem;color:var(--firefly-soft);}
.origin .firefly-card .big{font-size:2.1rem;font-weight:800;margin:8px 0 14px;letter-spacing:.08em;}
.origin .firefly-card p{font-size:.98rem;color:#e9e1cf;margin:0;line-height:2;}

/* 活動グリッド */
.act-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.act-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);transition:.25s;position:relative;overflow:hidden;
}
.act-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--firefly);}
.act-card .ico{
  width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:1.4rem;margin-bottom:16px;background:var(--paper-2);
}
.act-card h3{margin:0 0 10px;font-size:1.16rem;color:var(--night);letter-spacing:.03em;}
.act-card p{margin:0;font-size:.97rem;color:var(--ink-soft);line-height:1.85;}
.act-card .freq{
  display:inline-block;margin-top:14px;font-size:.78rem;font-weight:700;color:var(--river-deep);
  background:rgba(63,125,119,.1);border-radius:999px;padding:4px 12px;
}

/* 防災ハイライト */
.bosai{
  background:linear-gradient(135deg,var(--river-deep),var(--night));color:#fdf8ea;
  border-radius:18px;padding:44px 40px;box-shadow:var(--shadow);margin-top:44px;
  display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center;
}
.bosai h3{margin:0 0 14px;font-size:1.5rem;letter-spacing:.05em;}
.bosai p{margin:0;color:#e9e1cf;line-height:2;font-size:1rem;}
.bosai .stat{text-align:center;background:rgba(255,255,255,.06);border-radius:14px;padding:24px;}
.bosai .stat .n{font-size:2.4rem;font-weight:800;color:var(--firefly-soft);line-height:1;}
.bosai .stat .t{font-size:.9rem;color:#e9e1cf;margin-top:8px;}

/* 年間行事 */
.calendar{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.cal-item{
  display:flex;gap:16px;align-items:flex-start;background:var(--white);
  border:1px solid var(--line);border-left:5px solid var(--firefly);border-radius:10px;padding:16px 18px;
}
.cal-item .season{
  flex:none;font-weight:800;color:var(--river-deep);font-size:.86rem;letter-spacing:.05em;
  min-width:3.2em;
}
.cal-item .ev{font-size:1rem;color:var(--ink);}

/* 子供と共に進む会 */
.kids{
  margin-top:44px;background:var(--paper-2);border-radius:var(--radius);padding:34px 32px;
  border:1px dashed var(--river);
}
.kids h3{margin:0 0 12px;color:var(--river-deep);font-size:1.35rem;}
.kids p{margin:0 0 14px;color:var(--ink-soft);}
.kids .tags{display:flex;flex-wrap:wrap;gap:10px;}
.kids .tags span{
  background:var(--white);border:1px solid var(--line);border-radius:999px;padding:6px 16px;
  font-size:.9rem;color:var(--night);font-weight:700;
}

/* 関連リンク */
.links-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.link-card{
  display:flex;align-items:center;justify-content:space-between;gap:14px;text-decoration:none;
  background:var(--white);border:1px solid var(--line);border-radius:12px;padding:20px 24px;
  transition:.22s;box-shadow:var(--shadow-sm);
}
.link-card:hover{border-color:var(--firefly);transform:translateX(3px);}
.link-card .lc-main{}
.link-card .lc-title{font-weight:800;color:var(--night);font-size:1.05rem;}
.link-card .lc-desc{font-size:.86rem;color:var(--ink-soft);margin-top:4px;}
.link-card .arrow{color:var(--river-deep);font-size:1.3rem;flex:none;}

/* 一般ページ本文 */
.page-body{padding:60px 0;}
.page-body .entry{max-width:760px;margin:0 auto;}
.page-body h1{font-size:2rem;color:var(--night);margin:0 0 24px;}
.page-body h2{color:var(--night);margin-top:2em;}
.page-body img{border-radius:12px;margin:1.4em 0;}

/* ============================================================
   フッター
   ============================================================ */
.site-footer{background:var(--night);color:#d6cfbf;padding:56px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px;}
.site-footer h4{color:#fff;font-size:1.05rem;margin:0 0 14px;letter-spacing:.05em;}
.site-footer p{margin:0 0 8px;font-size:.94rem;line-height:1.9;}
.site-footer a{color:var(--firefly-soft);text-decoration:none;}
.site-footer a:hover{text-decoration:underline;}
.footer-nav ul{list-style:none;margin:0;padding:0;}
.footer-nav li{margin-bottom:8px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:20px;
  text-align:center;font-size:.84rem;color:#9c9482;
}

/* ============================================================
   お知らせ
   ============================================================ */
.news-list{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);}
.news-item{
  display:grid;grid-template-columns:118px 86px 1fr auto;gap:18px;align-items:center;
  text-decoration:none;padding:18px 8px;border-bottom:1px solid var(--line);transition:.2s;
}
.news-item:hover{background:var(--paper-2);}
.news-date{font-weight:700;color:var(--river-deep);font-size:.92rem;letter-spacing:.04em;}
.news-cat{
  justify-self:start;font-size:.74rem;font-weight:700;color:var(--night);
  background:var(--firefly-soft);border-radius:999px;padding:4px 12px;white-space:nowrap;
}
.news-title{color:var(--ink);font-size:1.04rem;font-weight:700;line-height:1.6;}
.news-item:hover .news-title{color:var(--river-deep);}
.news-arrow{color:var(--line);font-size:1.2rem;}
.news-item:hover .news-arrow{color:var(--firefly);}
.news-empty{
  background:var(--white);border:1px dashed var(--line);border-radius:var(--radius);
  padding:34px;text-align:center;color:var(--ink-soft);
}
.news-more{margin:26px 0 0;text-align:right;}
.news-more a{font-weight:700;text-decoration:none;}
.news-more a:hover{text-decoration:underline;}

/* ============================================================
   アクセス・連絡先
   ============================================================ */
.access{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:stretch;}
.info-table{width:100%;border-collapse:collapse;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);}
.info-table th,.info-table td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top;}
.info-table th{
  width:38%;background:var(--paper-2);color:var(--night);font-weight:700;font-size:.95rem;white-space:nowrap;
}
.info-table td{color:var(--ink-soft);font-size:.98rem;}
.info-table tr:last-child th,.info-table tr:last-child td{border-bottom:none;}
.info-table a{color:var(--river-deep);}
.map-embed{
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);min-height:320px;
  border:1px solid var(--line);
}
.map-embed iframe{width:100%;height:100%;min-height:320px;border:0;display:block;}
.map-note{font-size:.82rem;color:var(--ink-soft);margin:14px 0 0;}

/* ============================================================
   季節行事（イラスト入りカード）
   ============================================================ */
.events-feature{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:30px;}
.event-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);transition:.25s;display:flex;flex-direction:column;
}
.event-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);}
.event-illust{position:relative;aspect-ratio:16/9;display:block;}
.event-illust svg{width:100%;height:100%;display:block;}
.event-month{
  position:absolute;top:12px;left:12px;background:rgba(22,32,58,.86);color:var(--firefly-soft);
  font-weight:800;font-size:.82rem;letter-spacing:.06em;padding:5px 13px;border-radius:999px;
}
.event-body{padding:20px 22px 24px;}
.event-body h3{margin:0 0 8px;font-size:1.18rem;color:var(--night);}
.event-body p{margin:0;font-size:.95rem;color:var(--ink-soft);line-height:1.85;}

/* 補助行事リスト */
.event-mini{display:flex;flex-wrap:wrap;gap:10px;}
.event-mini span{
  background:var(--white);border:1px solid var(--line);border-radius:999px;padding:7px 16px;
  font-size:.9rem;color:var(--night);font-weight:700;
}

/* 年間スケジュール表 */
.schedule{width:100%;border-collapse:collapse;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);margin-top:8px;}
.schedule th,.schedule td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;font-size:.97rem;}
.schedule thead th{background:var(--night);color:#fdf8ea;font-weight:700;letter-spacing:.05em;}
.schedule td.mon{font-weight:800;color:var(--river-deep);white-space:nowrap;width:5.5em;}
.schedule tr:last-child td{border-bottom:none;}
.schedule tbody tr:hover{background:var(--paper-2);}

/* 拠点・関連施設 */
.facilities{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.facility{
  background:var(--white);border:1px solid var(--line);border-top:5px solid var(--river);
  border-radius:var(--radius);padding:24px 22px;box-shadow:var(--shadow-sm);
}
.facility .fl{font-size:.74rem;letter-spacing:.16em;color:var(--river-deep);font-weight:700;}
.facility h3{margin:6px 0 10px;font-size:1.12rem;color:var(--night);}
.facility p{margin:0;font-size:.93rem;color:var(--ink-soft);line-height:1.8;}
.facility .addr{margin-top:12px;font-size:.86rem;color:var(--night);font-weight:700;}

/* 加入方法 */
.join{
  background:linear-gradient(135deg,var(--firefly),#e89b1f);border-radius:18px;
  padding:42px 38px;box-shadow:var(--shadow);color:var(--night);
}
.join h3{margin:0 0 8px;font-size:1.6rem;letter-spacing:.04em;}
.join .jlead{margin:0 0 26px;font-size:1.02rem;max-width:42em;}
.join-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.jstep{background:rgba(255,255,255,.85);border-radius:12px;padding:22px 20px;}
.jstep .num{
  display:inline-flex;width:34px;height:34px;border-radius:50%;background:var(--night);color:var(--firefly-soft);
  align-items:center;justify-content:center;font-weight:800;margin-bottom:12px;
}
.jstep h4{margin:0 0 6px;font-size:1.05rem;color:var(--night);}
.jstep p{margin:0;font-size:.92rem;color:var(--ink-soft);line-height:1.8;}

/* 防災・避難所情報 */
.bousai-info{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:stretch;}
.bousai-links{display:flex;flex-direction:column;gap:14px;}
.bousai-links .bl-card{
  display:flex;align-items:center;justify-content:space-between;gap:14px;text-decoration:none;
  background:var(--white);border:1px solid var(--line);border-left:5px solid var(--river-deep);
  border-radius:12px;padding:18px 22px;box-shadow:var(--shadow-sm);transition:.2s;
}
.bousai-links .bl-card:hover{border-color:var(--firefly);transform:translateX(3px);}
.bousai-links .bl-title{font-weight:800;color:var(--night);}
.bousai-links .bl-desc{font-size:.84rem;color:var(--ink-soft);margin-top:3px;}

/* ============================================================
   LINE風タイムライン（投稿フィード）
   ============================================================ */
.timeline{max-width:640px;margin:0 auto;display:flex;flex-direction:column;gap:20px;}
.tl-post{display:flex;gap:12px;align-items:flex-start;}
.tl-avatar{
  width:46px;height:46px;border-radius:50%;flex:none;margin-top:4px;
  background:radial-gradient(circle at 50% 42%, var(--firefly-soft), var(--firefly) 38%, var(--river-deep) 72%, var(--night));
  box-shadow:0 0 0 2px rgba(242,177,52,.2);
}
.tl-bubble{
  position:relative;background:var(--white);border:1px solid var(--line);
  border-radius:6px 18px 18px 18px;padding:14px 16px 16px;box-shadow:var(--shadow-sm);flex:1;min-width:0;
}
.tl-bubble::before{
  content:"";position:absolute;left:-8px;top:14px;width:0;height:0;
  border-top:8px solid transparent;border-bottom:8px solid transparent;border-right:9px solid var(--white);
}
.tl-meta{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap;margin-bottom:6px;}
.tl-name{font-weight:800;color:var(--night);font-size:.98rem;}
.tl-cat{font-size:.7rem;font-weight:700;color:var(--night);background:var(--firefly-soft);border-radius:999px;padding:2px 10px;}
.tl-time{font-size:.78rem;color:var(--ink-soft);margin-left:auto;}
.tl-title{display:block;font-weight:800;color:var(--night);font-size:1.05rem;margin:2px 0 6px;text-decoration:none;}
a.tl-title:hover{color:var(--river-deep);}
.tl-text{margin:0;color:var(--ink);font-size:.97rem;line-height:1.8;}
.tl-photo{margin-top:12px;border-radius:14px;overflow:hidden;border:1px solid var(--line);}
.tl-photo img{width:100%;display:block;}
.tl-readmore{display:inline-block;margin-top:10px;font-weight:700;font-size:.9rem;text-decoration:none;}
.tl-readmore:hover{text-decoration:underline;}
.tl-empty{background:var(--white);border:1px dashed var(--line);border-radius:var(--radius);padding:34px;text-align:center;color:var(--ink-soft);}
.tl-head{text-align:center;margin-bottom:30px;}
.tl-head h1{font-size:1.9rem;color:var(--night);margin:0 0 8px;}
.tl-head p{color:var(--ink-soft);margin:0;}

/* ============================================================
   フォーム（会員投稿・お問い合わせ）
   ============================================================ */
.form-wrap{max-width:680px;margin:0 auto;}
.chiyoda-form{display:flex;flex-direction:column;gap:18px;margin-top:8px;}
.chiyoda-form label{display:flex;flex-direction:column;gap:7px;font-weight:700;color:var(--night);font-size:.98rem;}
.chiyoda-form label span.req{font-size:.72rem;color:#fff;background:#c0392b;border-radius:999px;padding:2px 9px;margin-left:8px;font-weight:700;}
.chiyoda-form input[type=text],
.chiyoda-form input[type=email],
.chiyoda-form textarea,
.chiyoda-form select{
  font:inherit;color:var(--ink);background:var(--white);border:1.5px solid var(--line);
  border-radius:10px;padding:13px 14px;width:100%;transition:.18s;
}
.chiyoda-form textarea{resize:vertical;min-height:140px;line-height:1.8;}
.chiyoda-form input:focus,.chiyoda-form textarea:focus,.chiyoda-form select:focus{
  outline:none;border-color:var(--firefly);box-shadow:0 0 0 3px rgba(242,177,52,.18);
}
.chiyoda-form input[type=file]{font:inherit;padding:10px 0;}
.chiyoda-form .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden;}
.chiyoda-form .form-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:4px;}
.form-note{margin-top:18px;font-size:.88rem;color:var(--ink-soft);}
.form-note a{color:var(--river-deep);}
.form-msg{border-radius:12px;padding:16px 18px;margin:0 0 22px;font-weight:700;line-height:1.7;}
.form-msg.ok{background:#e8f5e9;border:1px solid #a5d6a7;color:#2e7d32;}
.form-msg.err{background:#fdecea;border:1px solid #f5b7b1;color:#c0392b;}
.login-box{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;}
.login-box p{margin:0 0 16px;}

.btn-outline{border:1.6px solid var(--night);color:var(--night);background:transparent;}
.btn-outline:hover{background:var(--night);color:#fdf8ea;}

/* ============================================================
   フォトギャラリー
   ============================================================ */
.gallery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;}
.gal-item{position:relative;display:block;border-radius:12px;overflow:hidden;aspect-ratio:1/1;box-shadow:var(--shadow-sm);cursor:zoom-in;background:var(--paper-2);}
.gal-item img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease;display:block;}
.gal-item:hover img{transform:scale(1.06);}
.gal-cap{
  position:absolute;left:0;right:0;bottom:0;padding:18px 12px 9px;color:#fff;font-size:.84rem;font-weight:700;
  background:linear-gradient(180deg,transparent,rgba(22,32,58,.78));opacity:0;transition:.25s;
}
.gal-item:hover .gal-cap{opacity:1;}

/* WordPress標準ギャラリー／画像ブロックの体裁 */
.entry .wp-block-gallery,.entry .gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:1.4em 0;}
.entry .wp-block-image img,.entry .gallery img,.entry .wp-block-gallery img{border-radius:10px;width:100%;display:block;}

/* ライトボックス */
#chiyoda-lightbox{position:fixed;inset:0;z-index:1000;display:none;align-items:center;justify-content:center;
  background:rgba(11,16,30,.92);padding:24px;}
#chiyoda-lightbox.open{display:flex;}
#chiyoda-lightbox figure{margin:0;max-width:960px;width:100%;text-align:center;}
#chiyoda-lightbox img{max-width:100%;max-height:78vh;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.5);}
#chiyoda-lightbox .lb-cap{color:#fdf8ea;margin-top:14px;font-weight:700;}
#chiyoda-lightbox .lb-link{display:inline-block;margin-top:8px;color:var(--firefly-soft);font-size:.9rem;}
#chiyoda-lightbox .lb-close{position:absolute;top:18px;right:22px;background:none;border:none;color:#fff;font-size:2.2rem;line-height:1;cursor:pointer;}

/* ============================================================
   レスポンシブ
   ============================================================ */
@media(max-width:880px){
  body{font-size:16.5px;}
  .nav-toggle{display:block;}
  .main-nav{display:none;width:100%;}
  .main-nav.open{display:block;}
  .header-inner{flex-wrap:wrap;}
  .main-nav ul{flex-direction:column;width:100%;gap:2px;margin-top:8px;}
  .main-nav a{padding:13px 14px;border-radius:8px;}
  .origin{grid-template-columns:1fr;gap:28px;}
  .act-grid{grid-template-columns:1fr;}
  .bosai{grid-template-columns:1fr;padding:32px 26px;}
  .calendar{grid-template-columns:1fr;}
  .links-grid{grid-template-columns:1fr;}
  .news-item{grid-template-columns:1fr auto;gap:6px 12px;padding:16px 6px;}
  .news-date{grid-column:1;font-size:.86rem;}
  .news-cat{grid-column:2;grid-row:1;justify-self:end;}
  .news-title{grid-column:1 / span 2;}
  .news-arrow{display:none;}
  .access{grid-template-columns:1fr;}
  .events-feature{grid-template-columns:1fr;}
  .facilities{grid-template-columns:1fr;}
  .join{padding:32px 24px;}
  .join-steps{grid-template-columns:1fr;}
  .bousai-info{grid-template-columns:1fr;}
  .gallery-grid{grid-template-columns:repeat(2,1fr);}
  .entry .wp-block-gallery,.entry .gallery{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .hero-inner{padding:64px 22px 76px;}
}

@media(prefers-reduced-motion:reduce){
  .firefly{animation:none;opacity:.5;}
  html{scroll-behavior:auto;}
}