/* ==========================================================
   岡山県北生コンクリート協同組合 — 共通スタイル
   青基調の公共系コーポレート（onhk.or.jp の雰囲気に準拠）
   ========================================================== */
:root{
  --blue:#0b5fad;
  --blue-deep:#0a4a86;
  --blue-ink:#083a6a;
  --blue-pale:#e9f1f8;
  --blue-line:#c6d8ea;
  --surface:#f6f8fa;
  --line:#dde4ea;
  --text:#242c34;
  --muted:#5c6b78;
  --white:#ffffff;
  --holiday:#d97706;
  --holiday-bg:#fbeedd;
  --sun:#c0392b;
  --sat:#2563a8;
  --radius:10px;
  --shadow:0 2px 10px rgba(10,74,134,.08);
  --font:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Hiragino Sans",Meiryo,sans-serif;
  --font-en:"Archivo","Noto Sans JP",-apple-system,BlinkMacSystemFont,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--white);
  line-height:1.85;
  letter-spacing:.02em;
  font-feature-settings:"palt";
  -webkit-text-size-adjust:100%;
}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  background:var(--white);
  border-top:4px solid var(--blue);
  border-bottom:1px solid var(--line);
  position:sticky;top:0;z-index:100;
}
.header-inner{
  max-width:1080px;margin:0 auto;padding:12px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:12px;color:var(--text)}
.brand:hover{text-decoration:none}
.brand-mark{
  width:42px;height:42px;flex:none;border-radius:8px;
  background:linear-gradient(135deg,var(--blue) 0%,var(--blue-deep) 100%);
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:15px;letter-spacing:.02em;
}
.brand-text{line-height:1.35}
.brand-text .en{display:block;font-size:10px;color:var(--muted);letter-spacing:.14em;font-family:var(--font-en);font-weight:600}
.brand-text .ja{display:block;font-size:16px;font-weight:700}
.header-tel{text-align:right;line-height:1.4;flex:none}
.header-tel .tel-num{font-size:19px;font-weight:700;color:var(--blue-ink);white-space:nowrap}
.header-tel .tel-note{font-size:11px;color:var(--muted)}

/* nav */
.nav-toggle{
  display:none;width:48px;height:48px;flex:none;
  border:1px solid var(--line);border-radius:8px;background:var(--white);
  cursor:pointer;align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--blue-ink)}
.site-nav ul{display:flex;gap:4px;list-style:none}
.site-nav a{
  display:block;padding:8px 14px;border-radius:8px;
  color:var(--text);font-weight:500;font-size:14.5px;white-space:nowrap;
}
.site-nav a:hover{background:var(--blue-pale);text-decoration:none}
.site-nav a.current{color:var(--blue);font-weight:700;background:var(--blue-pale)}

/* ---------- page hero (下層) ---------- */
.page-hero{
  background:
    linear-gradient(120deg,rgba(8,58,106,.94) 0%,rgba(11,95,173,.9) 78%,rgba(31,116,196,.88) 100%),
    url(img/plant.jpg) center 30%/cover no-repeat;
  color:#fff;padding:44px 0 40px;position:relative;overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:repeating-linear-gradient(115deg,rgba(255,255,255,.045) 0 2px,transparent 2px 26px);
}
.page-hero .wrap{position:relative;z-index:1}
.page-hero .crumb{font-size:12.5px;color:rgba(255,255,255,.75);margin-bottom:8px}
.page-hero .crumb a{color:rgba(255,255,255,.9)}
.page-hero h1{font-size:30px;font-weight:700;letter-spacing:.04em;line-height:1.4}
.page-hero .hero-sub{margin-top:6px;font-size:14px;color:rgba(255,255,255,.85)}

/* ---------- sections ---------- */
section{padding:56px 0}
section.alt{background:var(--surface)}
.sec-head{margin-bottom:28px}
.sec-head .en{font-size:12px;font-weight:600;letter-spacing:.18em;color:var(--blue);text-transform:uppercase;font-family:var(--font-en)}
.sec-head h2{font-size:26px;font-weight:700;letter-spacing:.05em;line-height:1.4;
  padding-left:14px;border-left:5px solid var(--blue);margin-top:4px}
.sec-head .lead{margin-top:10px;color:var(--muted);font-size:14.5px}

/* ---------- tables ---------- */
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table.data{border-collapse:collapse;width:100%;font-size:14px;min-width:560px}
table.data th,table.data td{border:1px solid var(--line);padding:9px 12px;vertical-align:middle}
table.data thead th{background:var(--blue-deep);color:#fff;font-weight:700;text-align:center;white-space:nowrap}
table.data tbody th{background:var(--blue-pale);font-weight:700;text-align:center;white-space:nowrap}
table.data td.num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
table.data td.ctr{text-align:center}
table.data .note-cell{font-size:12.5px;color:var(--muted)}
.tnote{font-size:12.5px;color:var(--muted);margin-top:10px;line-height:1.8}
.tnote li{list-style:none;padding-left:1.2em;text-indent:-1.2em}

/* ---------- cards ---------- */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.btn{
  display:inline-block;padding:12px 26px;border-radius:999px;
  background:var(--blue);color:#fff;font-weight:600;font-size:14.5px;
  border:2px solid var(--blue);white-space:nowrap;
}
.btn:hover{background:var(--blue-deep);border-color:var(--blue-deep);text-decoration:none}
.btn.ghost{background:transparent;color:var(--blue);border-color:var(--blue)}
.btn.ghost:hover{background:var(--blue-pale)}
.btn.on-dark{background:#fff;color:var(--blue-ink);border-color:#fff}
.btn.on-dark:hover{background:var(--blue-pale);border-color:var(--blue-pale)}
.btn.on-dark.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.btn.on-dark.ghost:hover{background:rgba(255,255,255,.12)}

/* ---------- notice list ---------- */
.news-list{list-style:none;border-top:1px solid var(--line)}
.news-list li{border-bottom:1px solid var(--line)}
.news-list a,.news-list .row{
  display:flex;gap:18px;align-items:baseline;padding:16px 6px;color:var(--text);flex-wrap:wrap;
}
.news-list a:hover{background:var(--surface);text-decoration:none}
.news-date{flex:none;font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.news-tag{
  flex:none;font-size:11.5px;font-weight:700;color:var(--blue-deep);
  background:var(--blue-pale);border-radius:4px;padding:2px 10px;
}
.news-title{font-weight:500}

/* ---------- calendar ---------- */
.cal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.cal{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px 16px 14px;box-shadow:var(--shadow)}
.cal h3{text-align:center;font-size:15.5px;font-weight:600;color:var(--blue-ink);margin-bottom:10px;letter-spacing:.06em}
.cal table{border-collapse:collapse;width:100%;table-layout:fixed;font-size:13px}
.cal th{font-size:11.5px;font-weight:700;color:var(--muted);padding:4px 0;text-align:center}
.cal th.sun{color:var(--sun)}
.cal th.sat{color:var(--sat)}
.cal td{text-align:center;padding:5px 0;font-variant-numeric:tabular-nums;border-radius:6px}
.cal td.hol{background:var(--holiday-bg);color:#9a5200;font-weight:700}
.cal-legend{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.cal-legend .chip{width:16px;height:16px;border-radius:4px;background:var(--holiday-bg);border:1px solid var(--holiday);flex:none}

/* ---------- plants ---------- */
.plant-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.plant-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column}
.plant-head{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line)}
.plant-code{
  flex:none;width:40px;height:40px;border-radius:8px;background:var(--blue-pale);
  color:var(--blue-deep);font-weight:900;font-size:15px;
  display:flex;align-items:center;justify-content:center;
}
.plant-head h3{font-size:16.5px;font-weight:700;line-height:1.4}
.plant-body{padding:14px 18px 16px;font-size:14px}
.plant-body dl{display:grid;grid-template-columns:auto 1fr;gap:4px 14px}
.plant-body dt{font-weight:700;color:var(--muted);font-size:12.5px;white-space:nowrap;padding-top:2px}
.plant-body dd{font-variant-numeric:tabular-nums}
.plant-map{aspect-ratio:16/8.5;background:var(--surface)}
.plant-map iframe{width:100%;height:100%;border:0;display:block}

/* ---------- 概要表 ---------- */
table.overview{border-collapse:collapse;width:100%;font-size:14.5px}
table.overview th,table.overview td{border-bottom:1px solid var(--line);padding:14px 10px;text-align:left;vertical-align:top}
table.overview th{width:170px;color:var(--blue-ink);font-weight:700;white-space:nowrap}

/* ---------- footer ---------- */
.site-footer{background:var(--blue-ink);color:#fff;margin-top:0}
.footer-inner{max-width:1080px;margin:0 auto;padding:44px 24px 28px;display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.footer-org .name{font-size:17px;font-weight:700;margin-bottom:8px}
.footer-org p{font-size:13.5px;color:rgba(255,255,255,.82);line-height:2}
.footer-nav ul{list-style:none;display:flex;flex-direction:column;gap:6px}
.footer-nav a{color:rgba(255,255,255,.88);font-size:13.5px}
.copyright{border-top:1px solid rgba(255,255,255,.18);text-align:center;font-size:11.5px;color:rgba(255,255,255,.6);padding:14px 20px}

/* ---------- reveal（JS必須ではない: .js配下のみ透明化） ---------- */
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.js .reveal.shown{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:980px){
  .header-tel{display:none}
  .nav-toggle{display:flex}
  .site-nav{display:none;position:absolute;left:0;right:0;top:100%;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(10,74,134,.12)}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column;gap:0;padding:8px 16px 14px}
  .site-nav a{padding:13px 10px;border-bottom:1px solid var(--surface);border-radius:0;font-size:15px}
  .cal-grid{grid-template-columns:repeat(2,1fr)}
  .plant-grid{grid-template-columns:1fr}
}
@media(max-width:640px){
  .wrap{padding:0 18px}
  section{padding:42px 0}
  .page-hero h1{font-size:23px}
  .sec-head h2{font-size:21px}
  .cal-grid{grid-template-columns:1fr}
  .brand-text .ja{font-size:14px}
  table.overview th{width:110px}
}
@media(prefers-reduced-motion:reduce){
  .js .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}