:root{color-scheme:light}.water-page{max-width:1224px;margin:22px auto 40px;padding:0 18px;color:#143e4f;font-family:'Zen Maru Gothic','Yu Gothic',Meiryo,sans-serif}.page-intro{margin:0 0 20px}.page-intro h1{font-size:clamp(24px,3vw,34px);margin:0 0 5px}.page-intro p{margin:0;font-size:15px}.water-app{--ink:#143e4f;--teal:#087a7a;--paper:#fff9eb;color:var(--ink);background:#f7f0df;border:1px solid #c4cfbc;border-radius:22px;box-shadow:0 12px 32px #173b4520;overflow:hidden}.water-app *{box-sizing:border-box}.water-app [hidden]{display:none!important}.water-app button,.water-app summary,.water-app input{font:inherit}.water-app button{min-height:44px;min-width:44px;border:1px solid #b9c8bf;border-radius:10px;padding:9px 16px;background:#fffdf4;color:var(--ink);font-size:15px;font-weight:800;cursor:pointer;transition:background .12s,transform .12s}.water-app button:hover:not(:disabled){background:#e2f2ea;transform:translateY(-1px)}.water-app button:focus-visible,.water-app summary:focus-visible,.water-app input:focus-visible,.water-app a:focus-visible{outline:3px solid #dc692f;outline-offset:3px}.water-app button:disabled{cursor:default}.water-app button.primary{background:#087a7a;border-color:#066666;color:white;box-shadow:0 3px 0 #00585b}.water-app button.primary:hover{background:#07696b}.toolbar{min-height:67px;display:flex;align-items:center;gap:18px;padding:10px 20px;border-bottom:1px solid #d6dcc9;background:#fffbee}.back-link{color:#245c66;min-height:44px;display:grid;place-items:center;font-weight:700}.edition{font-size:12px;letter-spacing:.16em;margin-right:auto}.game-tools{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.game-tools button{font-size:12px;padding:8px 10px}.game-tools [aria-pressed=true]{background:#d7ede4}.volume-control{position:relative}.volume-control summary{display:flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid #b9c8bf;border-radius:10px;font-size:12px;cursor:pointer;list-style:none}.volume-control[open] label{position:absolute;right:0;top:48px;width:225px;padding:20px;background:#fffbee;z-index:8;border:1px solid #b9c8bf;border-radius:10px;box-shadow:0 5px 15px #143e4f33;font-size:14px}.volume-control input{width:100%;min-height:44px;accent-color:#087a7a}.volume-control output{float:right}.scene{padding:30px}.cover{display:grid;grid-template-columns:.82fr 1.7fr;gap:20px;align-items:center}.eyebrow{display:block;font-size:12px;letter-spacing:.12em;font-weight:800;color:#397061}.cover-copy{padding:10px 0 0 10px}.cover h2{font-size:clamp(32px,4.2vw,58px);line-height:1.35;letter-spacing:.01em;margin:17px 0 20px}.cover-copy p{font-size:17px;line-height:1.9}.little-wave{font-size:30px;color:#53aeb4;letter-spacing:.12em}.cover-art{margin:0;overflow:hidden;border-radius:45% 7px 45% 8px;box-shadow:0 6px 0 #d8ddc6;height:385px}.cover-art img{width:100%;height:100%;object-fit:cover;display:block}.boarding{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:10px}.water-app .ticket{display:flex;align-items:center;gap:18px;min-height:102px;text-align:left;border-radius:3px 18px 18px 3px;box-shadow:0 5px 0 #ad593728;border:1px dashed #ad593788;padding:18px 23px;background:#faac8d}.ticket-symbol{display:grid;place-items:center;background:#fff9eb9e;border-radius:50%;width:50px;height:50px;flex:none;font-size:28px}.ticket strong{display:block;font-size:clamp(16px,2vw,23px);line-height:1.45}.ticket small{display:block;font-size:12px;font-weight:600;margin-top:6px}.ticket b{margin-left:auto;font-size:28px}.water-app .ticket.teal{background:#c4e9e7;border-color:#4f9292}.cover-foot{grid-column:1/-1;margin:0;text-align:center;font-size:13px;letter-spacing:.08em}.play{padding:24px}.play-heading{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px}.play-heading h2{margin:5px 0 0;font-size:27px}.stats{display:flex;gap:0;border-top:2px solid #cad5c0;border-bottom:2px solid #cad5c0}.stats>span{padding:8px 16px;border-right:1px dashed #b9c8bf;text-align:center;min-width:82px}.stats>span:last-child{border:0}.stats small{display:block;font-size:11px;margin-bottom:3px}.stats b{font-size:25px}.journey-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:22px;align-items:start}.landscape{position:relative;aspect-ratio:16/9;min-width:0;overflow:hidden;border-radius:10px;border:5px solid #fffdf3;box-shadow:0 4px 0 #c6d3bf}.landscape img{width:100%;height:100%;object-fit:cover;display:block}.routes{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}.route{fill:none;stroke:#f6f7e9;stroke-width:5;stroke-dasharray:2 11;stroke-linecap:round;opacity:.6}.route.on{stroke:#09636c;stroke-width:6;stroke-dasharray:0;opacity:1}.marker{position:absolute;transform:translate(-50%,-50%);width:32px;height:32px;display:grid;place-items:center;border:3px solid #fffcef;border-radius:50%;color:#436f70;background:#e4ede0;font-weight:900;font-size:16px;box-shadow:0 2px 4px #244c5144}.marker.on{background:#087a7a;color:white}.scene-caption{position:absolute;left:8px;bottom:8px;padding:5px 8px;border-radius:5px;background:#fffbeded;color:#215661;font-size:10px;font-weight:800}.notebook{background:#fffdf1;border:1px solid #ddcbb3;border-top:10px solid #bd8661;box-shadow:5px 5px 0 #decbb273;padding:16px 20px;transform:rotate(.6deg)}.notebook-top{display:block;border-bottom:2px solid #dfc3a1;font-weight:800;padding-bottom:10px;font-size:16px}.notebook ol{list-style:none;margin:10px 0;padding:0}.notebook li{display:flex;gap:10px;align-items:center;border-bottom:1px dashed #d3dccf;min-height:37px;font-size:13px;font-weight:700;color:#70836d}.notebook li b{display:grid;place-items:center;width:23px;height:23px;border:1px solid #aec3b6;border-radius:50%;flex-shrink:0;font-size:11px}.notebook li.on{color:#076a69}.notebook li.on b{color:white;background:#087a7a}.science-note{font-size:12px;line-height:1.7;margin:13px 0 0;padding:10px;background:#e9f2e8}.word-bank{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px;margin:24px 0 16px}.water-app .word-tag{position:relative;min-height:74px;border:2px solid #bdcdbd;background:#fffdf1;font-size:16px;box-shadow:0 4px 0 #d0d3bb;padding:14px 8px}.word-tag::before{content:'·';display:block;color:#c2906d;font-size:22px;line-height:15px;margin-bottom:2px}.water-app .word-tag:disabled{border-color:#6eaaa1;background:#cce4d7;color:#346059;box-shadow:none}.water-app .word-tag.wrong{background:#ffe4d5;border-color:#bf6b3b}.feedback-row{display:flex;gap:20px;align-items:center;min-height:68px;padding:12px 17px;border-left:5px solid #59a5a1;background:#e8f0e0}.feedback-row p{flex:1;margin:0;font-size:15px;font-weight:700;line-height:1.8}.feedback-row button{flex-shrink:0}.play-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px;flex-wrap:wrap}.quiz-layout{grid-template-columns:minmax(0,.86fr) minmax(0,1fr)}.quiz-layout .landscape{align-self:center}.quiz-sheet{padding:0 8px 10px 10px}.quiz-sheet h3{font-size:clamp(20px,2.6vw,30px);line-height:1.7;margin:0 0 20px}.answers{display:grid;gap:12px}.water-app .answer{text-align:left;min-height:59px;border:2px solid #bccbbe;font-size:17px;line-height:1.5;background:#fffdf2;padding:12px 16px}.answer .answer-letter{display:inline-block;margin-right:12px;color:#62897c;font-size:13px}.water-app .answer.correct{background:#cfeae0;border-color:#087a7a;color:#124f51}.water-app .answer.wrong{background:#ffe6d7;border-color:#c86736;color:#7a351e}.water-app .answer:disabled{opacity:1}.quiz-layout+.word-bank[hidden]+.feedback-row{margin-top:20px}.record-heading{text-align:center;margin-bottom:20px}.record-heading h2{font-size:clamp(25px,3vw,37px);margin:10px 0}.record-heading p{font-weight:700;font-size:17px}.record-art{height:215px;margin:0;overflow:hidden;border:5px solid #fffdf4;border-radius:8px}.record-art img{width:100%;height:100%;object-fit:cover;object-position:center 62%;display:block}.accordion{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);padding:0;margin:22px 0;background:#fffdf3;border:1px solid #d6cdb6;box-shadow:0 6px 0 #cabda429}.accordion li{padding:16px 12px;border-right:1px dashed #b6c5b1;display:grid;justify-items:center;gap:9px;text-align:center;font-size:14px}.accordion li:last-child{border:0}.accordion b{width:30px;height:30px;display:grid;place-items:center;border-radius:50%;background:#e5ecd9;color:#5c776b}.accordion li.on b{background:#087a7a;color:white}.accordion small{font-size:11px;line-height:1.8}.record-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:22px}.record-note{text-align:center;font-size:11px;margin:20px 0 0}.quiz-review{display:grid;gap:7px;margin-top:18px}.review-row{display:grid;grid-template-columns:50px 1fr;gap:12px;padding:13px;border-bottom:1px dashed #bfccba;font-size:13px}.review-row b{color:#087a7a}.review-row p{margin:5px 0 0;font-size:12px}.water-app dialog{width:min(92vw,560px);max-height:90dvh;padding:28px;border:2px solid #96b7a2;border-radius:17px;color:#143e4f;background:#fff9eb;box-shadow:0 15px 60px #123d4f44}.water-app dialog::backdrop{background:#0e354b99}.water-app dialog h2{font-size:25px;margin:0 0 16px}.water-app dialog p,.water-app dialog li{font-size:16px;line-height:1.9}.dialog-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:20px}.screen-note{margin:0;text-align:center;font-size:13px}.screen-note:not(:empty){padding:12px}.parent-note{margin:20px 10px;font-size:13px;line-height:1.9}.parent-note summary{cursor:pointer;min-height:44px;display:flex;align-items:center;font-weight:700}.parent-note a{color:#087a7a;text-decoration:underline}.water-app:fullscreen{width:100%;height:100dvh;max-width:none;margin:0;border:0;border-radius:0;overflow:auto}.water-app:fullscreen .scene{max-width:1320px;margin:auto}.water-app:fullscreen .cover{min-height:calc(100dvh - 70px)}.water-app [data-paused=true] *{animation-play-state:paused!important}
@media(max-width:1000px){.edition{display:none}.toolbar{justify-content:space-between}.cover{grid-template-columns:1fr 1.3fr}.cover-art{height:320px}.cover h2{font-size:36px}.journey-layout{grid-template-columns:minmax(0,1fr) 230px;gap:15px}.notebook{padding:10px 12px}.notebook li{min-height:32px;font-size:12px}.science-note{font-size:11px}.quiz-layout{grid-template-columns:1fr 1.12fr}.word-bank{gap:7px}.water-app .word-tag{font-size:14px}.ticket-symbol{display:none}.water-app .ticket{padding:15px}.quiz-sheet h3{font-size:23px}.water-app .answer{font-size:15px}}
@media(max-width:760px){.water-page{padding:0 10px;margin-top:15px}.toolbar{padding:8px 12px;gap:10px;flex-wrap:wrap}.game-tools{margin-left:auto}.scene{padding:20px}.cover{grid-template-columns:1fr 1.2fr;gap:15px}.cover h2{font-size:31px}.cover-copy{padding:0}.cover-copy p{font-size:14px}.eyebrow{font-size:10px}.cover-art{height:270px}.little-wave{font-size:20px}.boarding{gap:10px}.ticket strong{font-size:16px}.ticket small{font-size:10px}.play{padding:16px}.play-heading h2{font-size:22px}.stats>span{padding:7px 10px;min-width:58px}.stats b{font-size:21px}.journey-layout{grid-template-columns:minmax(0,1fr)}.notebook{transform:none;border-top-width:5px}.notebook ol{display:grid;grid-template-columns:repeat(5,1fr);gap:7px;margin:8px 0}.notebook li{display:grid;justify-items:center;align-content:start;text-align:center;gap:4px;border:0;line-height:1.6}.notebook-top{font-size:12px;padding-bottom:5px}.science-note{margin:0;padding:8px;font-size:12px}.science-note br{display:none}.quiz-layout{grid-template-columns:.8fr 1.2fr}.quiz-layout .landscape{min-height:190px}.quiz-sheet{padding:0}.quiz-sheet h3{font-size:20px;margin-bottom:12px}.answers{gap:8px}.answer .answer-letter{margin-right:6px}.water-app .answer{font-size:14px;padding:10px}.word-bank{grid-template-columns:repeat(3,1fr);margin-top:17px}.water-app .word-tag{min-height:62px}.word-tag::before{display:none}.feedback-row{gap:12px}.feedback-row p{font-size:13px}.feedback-row button{font-size:13px}.play-actions{gap:7px}.play-actions button{font-size:13px}.accordion li{padding:12px 6px;font-size:12px}.accordion small{font-size:10px}}
@media(max-width:520px){.water-app{border-radius:13px}.toolbar{gap:6px;padding:7px 10px}.back-link{font-size:12px}.game-tools{gap:4px}.game-tools button{font-size:10px;padding:6px}.volume-control summary{font-size:10px}.water-app .toolbar button{min-width:44px}.scene{padding:16px}.cover{grid-template-columns:1fr;gap:15px}.cover-copy{padding:0 4px}.cover h2{font-size:34px;line-height:1.3;margin:10px 0}.cover h2 br{display:none}.cover-copy p{font-size:14px;margin:8px 0}.cover-copy p br{display:none}.little-wave{display:none}.cover-art{height:auto;aspect-ratio:16/9;border-radius:30% 5px 30% 5px;grid-row:2}.boarding{grid-template-columns:1fr;margin-top:3px;gap:12px}.water-app .ticket{min-height:80px;padding:12px 15px;gap:12px}.ticket-symbol{display:grid;width:39px;height:39px;font-size:24px}.ticket strong{font-size:17px}.ticket small{font-size:11px}.cover-foot{font-size:11px}.play{padding:12px}.play-heading{display:block;margin-bottom:14px}.play-heading h2{font-size:23px;margin:4px 0 12px}.stats{justify-content:space-between}.stats>span{flex:1;padding:6px}.stats small{font-size:10px}.stats b{font-size:21px}.landscape{border-width:3px}.marker{width:25px;height:25px;border-width:2px;font-size:12px}.scene-caption{font-size:8px;padding:3px 5px;left:4px;bottom:4px}.notebook{padding:8px}.notebook ol{gap:4px}.notebook li{font-size:10px}.notebook li b{width:20px;height:20px}.science-note{font-size:11px}.word-bank{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.water-app .word-tag{min-height:52px;font-size:14px;padding:9px 5px}.word-bank .word-tag:last-child{grid-column:1/-1}.feedback-row{display:block;padding:10px 12px;min-height:70px}.feedback-row button{width:100%;margin-top:10px}.feedback-row p{font-size:14px}.play-actions{display:grid;grid-template-columns:1fr 1fr;margin-top:14px}.play-actions button{font-size:12px;padding:8px 5px}.quiz-layout{display:flex;flex-direction:column;gap:16px}.quiz-layout .landscape{min-height:0;width:100%;height:135px;aspect-ratio:auto}.quiz-layout .landscape img{object-position:center 56%}.quiz-layout .routes,.quiz-layout #markers{display:none}.quiz-sheet{width:100%}.quiz-sheet h3{font-size:21px}.water-app .answer{min-height:55px;font-size:15px;padding:11px}.record-heading h2{font-size:25px;line-height:1.5}.record-heading p{font-size:15px}.record-art{height:145px}.accordion{grid-template-columns:1fr;margin:16px 0}.accordion li{grid-template-columns:30px 1fr;justify-items:start;text-align:left;padding:9px 12px;border-right:0;border-bottom:1px dashed #b6c5b1;gap:6px;font-size:14px}.accordion b{grid-row:span 2}.accordion small{font-size:11px;grid-column:2}.record-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}.record-actions button{font-size:13px;padding:10px 7px}.record-actions button.primary{grid-column:1/-1}.water-app dialog{padding:22px}.water-app dialog h2{font-size:22px}.water-app dialog p,.water-app dialog li{font-size:14px}.review-row{grid-template-columns:38px 1fr;gap:7px;font-size:12px;padding:11px 6px}.review-row p{font-size:11px}.water-app:fullscreen .cover{min-height:0}}
@media(max-height:500px) and (min-width:521px){.water-app:fullscreen .toolbar{position:static}.water-app:fullscreen .cover{min-height:0}.cover-art{height:225px}.cover h2{font-size:31px}.scene{padding:16px}.play-heading{margin-bottom:12px}.quiz-layout .landscape{max-height:240px}.record-art{height:150px}}
@media(prefers-reduced-motion:reduce){.water-app *{transition:none!important;animation:none!important}}

#sound-settings input{width:100%;min-height:44px;accent-color:#087a7a}#sound-settings output{float:right}.water-app[data-paused=true] *{animation-play-state:paused!important}

@media(max-width:520px){.notebook ol{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.notebook li{font-size:12px}.notebook li b{width:23px;height:23px}}