/* まちの水質くらべ(suishitsu-ds 0.1.0): 澄んだ水面と水深。他の地域型サイトの CSS とは別に設計(外部フォント・画像なし) */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--base);color:var(--ink);font:16px/1.8 "Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic UI","Yu Gothic",Meiryo,system-ui,sans-serif;font-feature-settings:"palt" 1;letter-spacing:.01em}
a{color:var(--deep);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--accent);text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:8px 14px;z-index:50}
.skip:focus{left:8px;top:8px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
/* ヘッダー: 水面のような半透明の帯 */
.hd{position:sticky;top:0;z-index:20;background:rgba(243,249,251,.92);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.hdIn{display:flex;align-items:center;gap:20px;min-height:64px;flex-wrap:wrap;padding-top:6px;padding-bottom:6px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.mark{width:38px;height:38px;flex:none}
.brandTx{display:flex;flex-direction:column;line-height:1.25}
.brandName{font-weight:800;font-size:17px;letter-spacing:.04em}
.brandSub{font-size:12px;color:var(--muted)}
.nav{margin-left:auto}
.nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:2px 4px}
.nav a{display:block;padding:6px 10px;border-radius:999px;font-size:14px;text-decoration:none;color:var(--ink)}
.nav a:hover{background:var(--mist);color:var(--deep)}
.navNat{border:1px solid var(--accent)}
/* ヒーロー(全国版): 水深のグラデーション+波 */
.hero{position:relative;color:#fff;background:linear-gradient(170deg,#0b6f86 0%,#08506a 45%,#063b4a 100%);padding:56px 0 76px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(60% 80% at 85% 10%,rgba(191,233,242,.28),transparent 60%),radial-gradient(40% 60% at 10% 90%,rgba(91,79,179,.22),transparent 70%);pointer-events:none}
.hero .wrap{position:relative}
.hero h1{font-size:clamp(28px,4.4vw,46px);line-height:1.3;margin:.2em 0 .4em;letter-spacing:.02em;max-width:22em;text-wrap:balance}
h1,h2,h3{text-wrap:balance}
.hero .lead{font-size:17px;max-width:44em;color:#e4f4f8}
.hero .eyebrow{color:#bfe9f2}
.hero .kpi{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.25)}
.hero .kpi dt,.hero .ks{color:#cfeaf1}
.hero .kv{color:#fff}
.wave{position:absolute;left:0;right:0;bottom:-1px;width:100%;height:46px}
.wave path{fill:var(--base)}
.heroCta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero .btn{background:#fff;color:var(--ink);border-color:#fff}
.hero .btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
.pageHead{padding:28px 0 20px;background:linear-gradient(180deg,var(--mist),var(--base))}
.pageHead h1{font-size:clamp(24px,3.4vw,36px);line-height:1.35;margin:.25em 0 .4em}
.lead{font-size:16.5px;max-width:52em;margin:0}
.eyebrow{font-size:13px;letter-spacing:.06em;color:var(--muted);margin:0;display:flex;flex-wrap:wrap;gap:6px 10px;align-items:center}
.crumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px;padding:0;margin:0 0 6px;font-size:13px}
.crumb li:not(:last-child)::after{content:"›";margin-left:6px;color:var(--muted)}
.band{padding:8px 0 4px}
.sec{padding:26px 0}
.sec h2{font-size:clamp(20px,2.6vw,26px);line-height:1.4;margin:0 0 .5em;padding-left:14px;border-left:5px solid var(--accent)}
.sec h3{font-size:18px;margin:1.2em 0 .5em}
.secLead{color:var(--muted);max-width:56em;margin:0 0 14px}
.note{font-size:13.5px;color:var(--muted);margin:.6em 0}
.muted{color:var(--muted)}
.src{font-size:13px;color:var(--muted);border-top:1px dashed var(--line);padding-top:10px}
.btn{display:inline-block;padding:10px 18px;border-radius:999px;background:var(--deep);color:#fff;text-decoration:none;font-weight:700;border:2px solid var(--deep)}
.btn:hover{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.ghost{background:transparent;color:var(--deep)}
/* KPI */
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:12px;margin:16px 0 0}
.kpis.small{grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.kpi{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:12px 16px;margin:0}
.kpi dt{font-size:12.5px;color:var(--muted)}
.kpi dd{margin:0;display:flex;flex-direction:column}
.kv{font-size:26px;font-weight:800;line-height:1.25;font-variant-numeric:tabular-nums;color:var(--deep)}
.ks{font-size:12.5px;color:var(--muted)}
/* 区分・項目・判定のバッジ(色+記号+文字) */
.wk{display:inline-flex;align-items:center;gap:4px;padding:1px 9px 1px 7px;border-radius:999px;font-size:12.5px;font-weight:700;border:1.5px solid;white-space:nowrap;background:#fff}
.wk-river{color:var(--river);border-color:var(--river)}
.wk-lake{color:var(--lake);border-color:var(--lake)}
.wk-sea{color:var(--sea);border-color:var(--sea)}
.ic{display:inline-block;padding:0 8px;border-radius:6px;font-size:12.5px;font-weight:700;color:#fff;background:var(--c);white-space:nowrap}
.sb{display:inline-block;padding:1px 8px;border-radius:6px;font-size:12.5px;white-space:nowrap;border:1px solid}
.sb-ok{color:#155e45;border-color:#7cc0a5;background:#eef8f3}
.sb-ng{color:#8a3a0c;border-color:#e3a47a;background:#fff4ec}
.sb-na{color:var(--muted);border-color:var(--line);background:#f7fafb}
.tr{display:inline-flex;gap:4px;align-items:center;font-size:13px;white-space:nowrap;padding:0 8px;border-radius:999px;background:#f0f6f8}
.tr-down{color:#0f5f73}.tr-up{color:#8a3a0c}.tr-flat{color:#33515c}.tr-na{color:var(--muted)}
/* 表 */
.scroll{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:var(--paper)}
.t{border-collapse:collapse;width:100%;font-size:14.5px}
.t th,.t td{padding:8px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.t thead th{background:var(--mist);font-size:13px;position:sticky;top:0;white-space:nowrap}
.t tbody tr:hover{background:#f6fbfc}
.t .num{text-align:right;font-variant-numeric:tabular-nums;white-space:nowrap}
.t .u,.u{font-size:11.5px;color:var(--muted);margin-left:3px;font-weight:400}
.t .sub,.sub{display:block;font-size:11.5px;color:var(--muted);font-weight:400}
.t td.few{background:repeating-linear-gradient(135deg,#fff,#fff 6px,#f1f7f9 6px,#f1f7f9 12px)}
.fewM{color:#8a3a0c;font-weight:700;margin-left:2px}
.sortBtn{font:inherit;font-weight:700;background:none;border:0;padding:0;color:inherit;cursor:pointer;text-align:inherit}
.sortBtn::after{content:" ⇅";color:var(--muted);font-weight:400}
.sortBtn[aria-sort="ascending"]::after{content:" ↑"}.sortBtn[aria-sort="descending"]::after{content:" ↓"}
details.yr{margin-top:14px;border:1px solid var(--line);border-radius:14px;background:var(--paper)}
details.yr>summary{cursor:pointer;padding:10px 14px;font-weight:700}
details.yr .scroll{border:0;border-top:1px solid var(--line);border-radius:0}
details.yr .note{padding:0 14px 8px}
/* 絞り込み */
.filters{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:flex-end;margin:0 0 12px;padding:14px;background:var(--paper);border:1px solid var(--line);border-radius:14px}
.filters label{display:flex;flex-direction:column;font-size:12.5px;color:var(--muted);gap:3px}
.filters label.chk,.mapTools label.chk{flex-direction:row;align-items:center;gap:6px;color:var(--ink);font-size:14px}
input[type=search],select{font:inherit;font-size:15px;padding:8px 10px;border:1.5px solid #9fc3cf;border-radius:10px;background:#fff;color:var(--ink);min-height:42px}
input[type=search]{min-width:min(280px,100%)}
input[type=checkbox]{width:18px;height:18px;accent-color:var(--deep)}
.count{margin:0 0 0 auto;font-weight:700;color:var(--deep)}
.mapTools{display:flex;flex-wrap:wrap;gap:8px 16px;align-items:center;margin-bottom:10px}
/* 位置図(背景地図なし・緯度経度の目盛り) */
.map{margin:0;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:10px}
.map>svg{width:100%;height:auto;display:block;max-height:720px}
.lgI svg{width:14px;height:14px;flex:none}
#sqMini>svg,#sqWater>svg{max-height:340px}
.mapBg{fill:#eef7fa}
.mg{stroke:#cfe3ea;stroke-width:1;stroke-dasharray:3 5}
.mgT{font-size:10px;fill:#5d7d88}
.pt circle,.pt rect,.pt path{stroke:#fff;stroke-width:1.4}
.pt-river circle{fill:var(--river)}.pt-lake rect{fill:var(--lake)}.pt-sea path{fill:var(--sea)}
.pt-off circle,.pt-off rect,.pt-off path{fill:#fff;stroke-width:1.8}
.pt-off.pt-river circle{stroke:var(--river)}.pt-off.pt-lake rect{stroke:var(--lake)}.pt-off.pt-sea path{stroke:var(--sea)}
.pt:hover circle,.pt:hover rect,.pt:hover path,.pt:focus circle,.pt:focus rect,.pt:focus path{stroke:var(--focus);stroke-width:3}
.pt .halo{fill:none!important;stroke:var(--focus)!important;stroke-width:2.5!important;stroke-dasharray:4 3}
.pt.hide{display:none}
.map figcaption{font-size:12.5px;color:var(--muted);margin-top:8px}
.lg{display:inline-flex;flex-wrap:wrap;gap:4px 12px;margin-left:6px}
.lgI{display:inline-flex;align-items:center;gap:4px}
.lgR{fill:var(--river)}.lgL{fill:var(--lake)}.lgS{fill:var(--sea)}.lgOff{fill:#fff;stroke:var(--river);stroke-width:1.6}
/* カード */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,460px),1fr));gap:16px}
.cards3{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,280px),1fr));gap:16px}
.card,.rankCard,.chg{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:16px 18px;box-shadow:0 1px 0 rgba(6,59,74,.04),0 10px 24px -18px rgba(6,59,74,.35)}
.card h3,.rankCard h3,.chg h3{margin:0 0 .4em;font-size:17px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.cond{font-size:13px;color:var(--muted);margin:0 0 8px}
.rk2{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}
.rk2 h4{font-size:13px;margin:.2em 0;color:var(--muted)}
.rk2 ol{margin:0;padding-left:1.3em}
.rk2 li{display:flex;justify-content:space-between;gap:8px;padding:4px 0;border-bottom:1px dotted var(--line)}
.rk2 li b{font-variant-numeric:tabular-nums;white-space:nowrap}
.rkN{display:flex;flex-direction:column;line-height:1.35}
.cityTag{font-size:11.5px;color:var(--muted)}
.rkNote{font-size:13px;margin:.6em 0 0}
/* 変化の目安(帯) */
.cbar{display:flex;height:16px;border-radius:999px;overflow:hidden;margin:8px 0;background:#eef4f6}
.cb{display:inline-block;min-width:3px}
.cb-down{background:#0b7a8f}.cb-flat{background:#9db5bd}.cb-up{background:#c26a2a}.cb-na{background:repeating-linear-gradient(135deg,#dfe9ec,#dfe9ec 4px,#fff 4px,#fff 8px)}
.cleg{list-style:none;padding:0;margin:0 0 8px;display:flex;flex-wrap:wrap;gap:4px 14px;font-size:13px}
.cleg .cb{width:12px;height:12px;border-radius:3px;margin-right:4px;vertical-align:-1px}
/* 一覧 */
.subList{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:8px}
.subList li{display:flex;justify-content:space-between;gap:8px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:8px 12px}
.prefGrid{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px}
.prefGrid li{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:8px 12px;display:flex;justify-content:space-between;gap:6px}
.results{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.results li{background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:8px 12px;display:flex;flex-wrap:wrap;gap:4px 10px;align-items:center}
/* グラフ */
.charts{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,460px),1fr));gap:16px}
.chartFig{margin:0;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:12px 14px}
.chartFig.wide{grid-column:1/-1}
.chartFig figcaption{font-weight:700;font-size:14.5px;margin-bottom:6px;display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.schart{width:100%;height:auto;display:block}
.sc-bg{fill:#f5fafc}
.sc-grid{stroke:#d8e8ee;stroke-width:1}
.sc-ax,.sc-unit{font-size:11px;fill:#4d6f7a}
.sc-band{stroke:#c2410c;stroke-width:1.6;stroke-dasharray:7 5}
.sc-bandT{font-size:11px;fill:#a3380b;font-weight:700}
.sc-lt{fill:#fff;stroke-width:1.8}
.sc-few{fill:none;stroke-width:1.4;stroke-dasharray:2 2.5}
.legend{list-style:none;padding:0;margin:6px 0 0;display:flex;flex-wrap:wrap;gap:4px 14px;font-size:12.5px;color:var(--muted)}
.legend li{display:flex;align-items:center;gap:5px}
.sw{display:inline-block;width:18px;height:3px;background:var(--c);border-radius:2px}
.sw.dash{background:repeating-linear-gradient(90deg,var(--c),var(--c) 5px,transparent 5px,transparent 8px)}
.sh{display:inline-block;width:11px;height:11px;background:var(--c)}
.sh-o{border-radius:50%}.sh-t{clip-path:polygon(50% 0,100% 100%,0 100%)}.sh-d{clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%)}
.swLt,.swFew{font-size:14px;color:var(--deep)}
.spark{vertical-align:middle}
/* 地点の詳細 */
.grid2{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:20px;align-items:start}
.dl{display:grid;grid-template-columns:max-content 1fr;gap:6px 16px;margin:0;background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:14px 18px}
.dl dt{color:var(--muted);font-size:13.5px}
.dl dd{margin:0}
.strip{position:relative;height:30px;margin:14px 0 4px;background:linear-gradient(90deg,#e8f4f7,#cfe6ee);border-radius:999px}
.sd{position:absolute;top:9px;width:4px;height:12px;margin-left:-2px;background:#7aa7b5;border-radius:2px}
.sd.cur{top:3px;height:24px;width:8px;margin-left:-4px;background:var(--focus);box-shadow:0 0 0 2px #fff}
.yearSel{display:flex;flex-wrap:wrap;gap:12px;align-items:flex-end}
.yearSel label{display:flex;flex-direction:column;font-size:12.5px;color:var(--muted)}
.kgBlock{margin-bottom:34px}
.cmp{background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:16px}
.cmpCtl{display:flex;flex-wrap:wrap;gap:10px 14px;align-items:flex-end;margin-bottom:12px}
.cmpCtl label{display:flex;flex-direction:column;font-size:12.5px;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.chipX{display:inline-flex;align-items:center;gap:6px;padding:4px 6px 4px 12px;border-radius:999px;border:1.5px solid var(--c);background:#fff;font-size:14px}
.chipX button{font:inherit;border:0;background:var(--mist);border-radius:999px;width:26px;height:26px;cursor:pointer}
.warn{background:#fff6ec;border:1px solid #e3a47a;border-radius:10px;padding:8px 12px;font-size:14px;color:#7a3409}
.sugg{list-style:none;margin:4px 0 0;padding:0;border:1px solid var(--line);border-radius:10px;max-height:260px;overflow:auto;background:#fff}
.sugg button{display:block;width:100%;text-align:left;font:inherit;background:none;border:0;border-bottom:1px solid var(--line);padding:8px 12px;cursor:pointer}
.sugg button:hover,.sugg button:focus{background:var(--mist)}
.prose{max-width:860px}
.prose h2{margin-top:1.6em}
.prose li{margin:.3em 0}
/* 注意・フッター */
.safety{background:#e8f3f6;border-top:1px solid var(--line);padding:22px 0;margin-top:30px}
.safetyH{font-size:16px;margin:0 0 6px}
.safety ul{margin:0;padding-left:1.2em;font-size:14px}
.ft{background:var(--ink);color:#dcebf0;padding:30px 0 22px;font-size:14px}
.ft a{color:#fff}
.ftTop{display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between}
.ftName{font-weight:800;font-size:17px;margin:0;color:#fff}
.ftLead{margin:.2em 0 0;color:#a9cbd6}
.ftLinks{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(100%,200px),1fr));gap:4px 18px;flex:1 1 280px;min-width:0;max-width:680px}
.disc{font-size:12.5px;color:#a9cbd6;margin:18px 0 6px}
.ftLast{font-size:12.5px;color:#a9cbd6;margin:0}
@media (max-width:760px){
  body{font-size:15.5px}
  .wrap{padding:0 16px}
  .nav{margin-left:0;width:100%}
  .nav ul{flex-wrap:nowrap;overflow-x:auto;padding-bottom:4px}
  .nav a{white-space:nowrap;font-size:13.5px;padding:6px 9px}
  .hd{position:static}
  .grid2{grid-template-columns:1fr}
  .hero{padding:36px 0 60px}
  .kv{font-size:22px}
  .dl{grid-template-columns:1fr}
  .dl dt{margin-top:6px}
  .count{margin-left:0}
  .t{font-size:13.5px}
  .t th,.t td{padding:7px 9px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.hd,.nav,.filters,.mapTools,.safety{display:none}}