:root{color-scheme:dark;--bg:#101b29;--panel:#162436;--line:#2c3b4b;--muted:#9eafbf;--text:#edf4f7;--aqua:#55e0cc;--amber:#ffc789}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Noto Sans JP",sans-serif;font-size:16px;line-height:1.65}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid var(--amber);outline-offset:4px}button{touch-action:manipulation}button:disabled{cursor:default;opacity:.55}.shell{max-width:1160px;margin:auto;padding:0 48px}header{height:100px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;color:var(--text);font-size:25px;letter-spacing:4px;font-weight:750;text-decoration:none}.brand svg{width:29px;height:29px;stroke:var(--aqua);stroke-width:6;fill:none;stroke-linejoin:round}.brand span{border-left:1px solid #435062;padding-left:18px;margin-left:8px;letter-spacing:1px;font-size:13px;font-weight:400;color:var(--muted)}.icon-button{border:1px solid #425163;border-radius:50%;color:var(--muted);background:none;width:36px;height:36px;font-size:18px}.intro{padding:42px 0 32px}.eyebrow{font-size:12px;letter-spacing:2.5px;font-weight:650;color:var(--aqua)}h1{font-size:30px;letter-spacing:1.5px;margin:10px 0 9px;font-weight:650}.intro p{margin:0;color:var(--muted);font-size:14px;letter-spacing:.5px}.workspace{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,1fr);gap:34px;align-items:start}.game{background:var(--panel);border:1px solid #2d3c4e;border-radius:20px;padding:22px 26px 18px;box-shadow:0 20px 60px #040d151a}.board-heading{display:flex;align-items:center;justify-content:space-between}.board-heading>div:first-child{display:flex;gap:14px;align-items:center}.board-heading .eyebrow{color:var(--muted);font-size:11px;letter-spacing:2px}.board-heading strong{font-size:25px;font-weight:500;font-variant-numeric:tabular-nums}.moves{display:flex;align-items:baseline;gap:10px;color:var(--muted);font-size:12px}.moves strong{color:var(--text);font-size:23px}.board-wrap{padding:32px 0;position:relative}.board{display:grid;grid-template-columns:repeat(var(--n,5),1fr);gap:7px;background:#0e1b2a;padding:9px;border:1px solid #344557;border-radius:13px}.tile{padding:0;border:1px solid #314357;background:#203246;aspect-ratio:1;border-radius:8px;position:relative;display:grid;place-items:center;min-width:0;transition:background .15s,border-color .15s}.tile:hover{background:#2b4054;border-color:#658093}.tile svg{width:100%;height:100%;overflow:visible}.pipe-shadow{stroke:#0c1927;stroke-width:23}.pipe-body{stroke:#75899d;stroke-width:17}.pipe-core{stroke:#a1b0bd;stroke-width:7;opacity:.45}.tile path{fill:none;stroke-linejoin:round;stroke-linecap:butt}.tile.wet{background:#1c3b46;border-color:#386770}.wet .pipe-body{stroke:#39bda9}.wet .pipe-core{stroke:#83ffe6;opacity:1}.tile.hinted{outline:3px solid var(--amber);outline-offset:-3px}.tile.running .pipe-core{stroke-dasharray:9 8;animation:flow .65s linear infinite}.port{position:absolute;display:flex;align-items:center;gap:7px;font-size:11px;letter-spacing:1px;font-weight:700;line-height:1}.port span{font-size:11px;font-weight:400;letter-spacing:0}.input{top:13px;left:10px;color:var(--aqua)}.output{bottom:13px;right:10px;color:var(--amber)}.board-footer{display:flex;gap:18px;justify-content:center;color:var(--muted);font-size:11px}.board-footer>span{display:flex;align-items:center;gap:6px}.legend{width:8px;height:8px;background:#92a4b5;border-radius:2px}.legend.water{background:var(--aqua)}.control-panel{padding:24px;border:1px solid var(--line);border-radius:18px;background:#142233}.panel-title{display:flex;justify-content:space-between;align-items:center;font-size:16px;font-weight:600;margin-bottom:26px}.small-drop{color:var(--aqua);font-size:23px}.field-label{font-size:13px;color:var(--muted);margin-bottom:10px}.difficulty{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;background:#0d1927;padding:5px;border-radius:10px}.difficulty button{color:var(--muted);background:none;border:1px solid transparent;border-radius:7px;padding:9px 2px;font-size:13px;white-space:nowrap}.difficulty small{display:block;font-size:11px;margin-top:1px;opacity:.8}.difficulty .active{background:#254247;border-color:#476b69;color:#8aefda}.status{display:flex;gap:11px;align-items:center;margin:24px 0 20px;min-height:49px}.status-symbol{color:var(--aqua);font-size:26px;min-width:25px}.status strong{font-size:14px;font-weight:500}.status p{font-size:12px;color:var(--muted);margin:2px 0 0}.status.success strong{color:var(--aqua)}.status.warning strong{color:var(--amber)}.primary{display:flex;align-items:center;justify-content:center;gap:9px;width:100%;border:0;border-radius:10px;background:var(--aqua);color:#0e302f;min-height:54px;font-weight:700;font-size:16px;box-shadow:0 3px 0 #208d7e}.primary:hover{background:#81eddb}.primary svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.7}.secondary-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:13px}.secondary-actions button{border:1px solid #354658;border-radius:9px;background:transparent;color:var(--muted);padding:10px 3px;font-size:18px;min-height:46px}.secondary-actions span{font-size:13px}.secondary-actions button:hover{color:var(--text);background:#203246}.new-puzzle{border:0;background:none;color:var(--muted);display:block;margin:18px auto 0;font-size:13px;text-decoration:underline;text-underline-offset:5px;min-height:32px}.how-to{padding:27px 7px 0}.how-to .eyebrow{font-size:10px;color:#8fa1b4;letter-spacing:2px}.how-to h2{font-size:16px;margin:8px 0 14px;font-weight:500}.how-to ol{list-style:none;padding:0;margin:0}.how-to li{font-size:13px;color:#b8c6d2;margin:10px 0;display:flex;align-items:center;gap:9px}.how-to li>span{font-size:11px;color:var(--aqua);margin-right:4px;font-variant-numeric:tabular-nums}.how-to b{font-size:11px;color:var(--aqua);font-weight:600}.how-to p{font-size:12px;line-height:1.9;color:#8296aa;margin-top:20px}footer{display:flex;justify-content:space-between;gap:14px;margin:38px 0 26px;padding-top:22px;border-top:1px solid var(--line);font-size:10px;letter-spacing:1px;color:#8192a5}footer i{font-style:normal;padding:0 8px}dialog{max-width:440px;width:calc(100% - 32px);background:var(--panel);border:1px solid #466076;border-radius:20px;padding:32px;color:var(--text)}dialog::backdrop{background:#020a14b8;backdrop-filter:blur(5px)}dialog h2{font-size:22px}dialog p{font-size:15px;color:var(--muted)}.close{position:absolute;right:12px;top:8px;background:none;border:0;color:var(--muted);font-size:28px;width:40px;height:40px}.close-help{margin-top:24px}@keyframes flow{to{stroke-dashoffset:-34}}@media(min-width:1250px){.intro{padding-top:48px}}@media(max-width:800px){.shell{padding:0 22px;max-width:620px}header{height:78px}.intro{padding:26px 0 22px}.workspace{grid-template-columns:1fr;gap:20px}h1{font-size:25px}.game{padding:16px 22px}.control-panel{padding:20px}.panel-title{margin-bottom:16px}.status{margin:17px 0}.how-to{padding-top:23px}footer{margin-top:30px}.how-to p{margin-bottom:0}}@media(max-width:420px){.shell{padding:0 16px}.brand{font-size:23px;gap:9px}.brand span{font-size:11px;padding-left:11px;margin-left:0}h1{font-size:22px;letter-spacing:.5px}.intro p{font-size:12px}.game{padding:14px 14px}.board{gap:5px;padding:7px}.board-footer{gap:12px;font-size:10px}.tile{border-radius:6px}.control-panel{padding:18px}footer{flex-direction:column;font-size:9px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
/* Keep game controls comfortably readable across screen sizes. */
.field-label,.difficulty button,.status strong,.secondary-actions span,.new-puzzle,.how-to li{font-size:14px}.difficulty small,.status p,.how-to p,.board-footer,.moves,.brand span,.intro p{font-size:12px}.how-to .eyebrow,.board-heading .eyebrow,.how-to li>span,.how-to b,.port,.port span,footer{font-size:12px}.tile:disabled{opacity:1}.board:has(.running){box-shadow:0 0 22px #55e0cc14}@media(max-width:420px){.board-footer{font-size:12px;gap:8px;flex-wrap:wrap}.brand span{font-size:12px}.intro p{font-size:13px}}@media(max-width:800px){.workspace aside{display:flex;flex-direction:column}.game{width:100%}}

/* ===== ここから下は、医院のサイト用に足したもの（サイト運用/水道管パズルをサイト用に写す.py） ===== */
/* 医院のサイトへ戻る帯 */
.clinic-note{margin:0;padding:9px 16px;display:flex;flex-wrap:wrap;justify-content:center;gap:4px 18px;background:#0b1520;border-bottom:1px solid var(--line);color:var(--muted);font-size:12px;line-height:1.6;text-align:center}.clinic-note a{color:var(--aqua);text-decoration:underline;text-underline-offset:3px}