:root{--dp-ink:#123f78;--dp-blue:#007dea;--dp-mint:#dff5ec;--dp-yellow:#ffdc79;--dp-snack:32px}
*{box-sizing:border-box}body{margin:0;color:var(--dp-ink);background:#fffaf0;font-family:system-ui,"Yu Gothic",sans-serif;line-height:1.65}main{max-width:1080px;margin:auto;padding:24px 20px 20px}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(28px,4.5vw,46px);line-height:1.45;letter-spacing:.03em}h2{font-size:23px;line-height:1.6}button,a.button{font:inherit;font-weight:700;min-height:46px;padding:9px 18px;border:1px solid #aacfed;border-radius:26px;background:#fff;color:var(--dp-ink);cursor:pointer;text-align:center;touch-action:manipulation;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;gap:6px}button.primary,a.primary{background:linear-gradient(#009dff,#0074e3);color:white;border-color:#0084e7;box-shadow:inset 0 2px 2px #77d6ff,0 3px 0 #0961b12b}button:disabled{cursor:default;opacity:.43;box-shadow:none}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #b57600;outline-offset:3px}button:hover:enabled{filter:brightness(.97)}[hidden]{display:none!important}.panel{background:#fff;border:1px solid #cde2ed;border-radius:28px;padding:28px;box-shadow:0 8px 24px #3d79a40a}.subject{display:inline-block;background:#e2f3ff;color:#055c98;border-radius:25px;padding:5px 14px;font-size:14px;font-weight:700}.small{font-size:14px;color:#446a87}.hero{display:grid;grid-template-columns:1fr 260px;align-items:center;padding:30px 36px;background:linear-gradient(120deg,#fffdf7,#e6f7f4);border-radius:30px;border:1px solid #c7e3e8}.hero p{margin-bottom:8px}.hero h1{margin:12px 0}.hero-art{display:flex;align-items:flex-end;justify-content:center;gap:0}.hero-art .animal{width:130px;height:140px}.hero-art .bag-art{width:110px}.mode-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:22px 0}.mode-card{padding:23px 25px;position:relative}.mode-card h2{margin:0 0 7px}.mode-card .mode-symbol{float:right;width:70px;height:68px;margin:0 0 5px 10px}.mode-card p{min-height:52px}.mode-actions{display:flex;flex-wrap:wrap;gap:10px}.mode-actions button{flex:1 1 150px}.home-tools{display:flex;gap:10px;flex-wrap:wrap}.play-top{display:flex;align-items:center;gap:15px;margin-bottom:10px}.play-top strong{margin-left:auto;white-space:nowrap}.play-top span{font-size:15px}.progress-track{height:5px;background:#dbe8ea;border-radius:8px;margin-bottom:20px;overflow:hidden}.progress-track span{display:block;background:#009fc0;height:100%}.question{font-size:clamp(19px,2.5vw,25px);margin-bottom:14px}.question:focus{outline:none}.order{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:15px}.order span{border-radius:12px;padding:5px 13px;background:#ecf7fd;font-size:15px}.order span:last-child{background:#fff0c4}.practice-note{margin:10px 0;background:#eef8fe;border-left:4px solid #0091d5;padding:10px 15px;border-radius:12px}.workbench{padding:20px;display:grid;grid-template-columns:225px 1fr;gap:20px;align-items:start;border:1px solid #ecdab8;border-radius:24px;background:repeating-linear-gradient(0deg,#fff4dd 0,#fff4dd 51px,#f5e9cf 52px,#fff4dd 54px)}.tray{background:#fffdf7;border:2px solid #ead7b6;border-radius:22px;box-shadow:0 4px 0 #ddcda866;padding:15px 12px}.tray h3{font-size:17px;text-align:center;margin:0}.tray .tray-count{text-align:center;margin:4px 0 8px;font-weight:700}.tray-count strong{font-size:29px}.snack-grid{display:grid;grid-template-columns:repeat(5,var(--dp-snack));gap:3px;justify-content:center;align-content:center;min-height:145px}.snack{display:block;width:var(--dp-snack);height:var(--dp-snack);flex-shrink:0}.empty-tray{height:145px;display:grid;place-items:center;color:#547081;font-size:14px}.target-area{min-width:0}.target-tools{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:12px;flex-wrap:wrap}.target-tools p{margin:0;font-size:15px}.targets{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px 10px}.target{min-width:0;text-align:center;--dish:#e1f3ff;--rim:#83bfea}.target:nth-child(3n+2){--dish:#fff2ba;--rim:#dfbc4d}.target:nth-child(3n){--dish:#d6f3e5;--rim:#86c8b0}.target-title{display:flex;flex-direction:column;align-items:center;gap:1px;font-size:13px;font-weight:700;margin:0}.animal{display:block;width:70px;height:70px}.target .animal{margin-bottom:-5px;position:relative;z-index:1}.target-number{font-size:14px;background:white;padding:1px 7px;border-radius:12px;position:relative;z-index:2}.dish{min-height:90px;border:3px solid var(--rim);border-radius:42%;background:var(--dish);box-shadow:inset 0 0 0 5px #ffffff9c,0 3px 0 #ae967532;padding:12px 5px;display:grid;grid-template-columns:repeat(3,var(--dp-snack));gap:2px;justify-content:center;align-content:center}.dish.bag{border-radius:9px 9px 25px 25px;min-height:116px;position:relative;margin-top:14px;padding-top:20px;box-shadow:inset 0 0 0 4px #ffffff6b,0 3px 0 #ae967532}.bag:before{content:"";position:absolute;left:8px;right:8px;top:-10px;height:18px;background:var(--dish);border:2px solid var(--rim);border-radius:6px;transform:rotate(-2deg)}.ribbon{position:absolute;left:calc(50% - 16px);top:-18px;font-size:30px;z-index:2;color:#007bbb;line-height:1}.target-count{font-size:19px;font-weight:750;margin:5px 0}.target-buttons{display:grid;grid-template-columns:1fr 1fr;gap:5px}.target-buttons button{padding:6px 2px;min-width:0;min-height:44px;font-size:15px;border-color:#b4ccdf;border-radius:15px}.target-buttons button:first-child{background:#e4f5ff}.remove-bag{width:100%;font-size:13px;margin-top:6px;padding:4px!important;border-radius:15px}.no-bags{background:#fffdf4d9;border:2px dashed #d7c295;border-radius:20px;min-height:190px;padding:25px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;grid-column:1/-1}.no-bags p{margin:0}.actions{display:grid;grid-template-columns:1fr minmax(200px,290px);gap:15px;align-items:center;margin-top:17px}.helpers{display:flex;flex-wrap:wrap;gap:7px}.helpers button{font-size:14px;padding:8px 14px}.judge{min-height:53px;font-size:21px}.hint{background:#fff3cc;border-left:4px solid #e4b939;border-radius:12px;padding:12px 16px;margin:16px 0 0}.feedback{padding:18px 22px;border-radius:20px;background:#e3f5eb;border-left:5px solid #288b73;margin-top:17px}.feedback.wrong{background:#fff4d4;border-color:#daa735}.feedback h3{margin:0 0 8px;font-size:22px}.feedback p{margin-bottom:7px}.equation{display:flex;gap:12px;align-items:center;justify-content:center;flex-wrap:wrap;margin:15px 0 10px;font-size:28px;font-weight:700}.equation .number{display:flex;flex-direction:column;align-items:center;background:#fffaf2;border-radius:14px;min-width:100px;padding:8px 12px}.equation small{font-size:12px;font-weight:500;display:block}.next-row{display:flex;justify-content:flex-end;gap:10px;margin-top:16px;flex-wrap:wrap}.next-row .primary{min-width:250px}.result-score{font-size:46px;font-weight:800;margin:10px 0;color:#087ecc}.result-score small{font-size:19px}.result-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:22px 0}.result-item{padding:16px 18px;background:#f2f9ff;border:1px solid #cbe4f1;border-radius:22px}.result-item p{margin:5px 0;font-size:14px}.result-item strong{font-size:22px}.result-actions{display:flex;gap:10px;flex-wrap:wrap}.save-line{font-size:13px;color:#486f88;padding:22px 2px;display:flex;align-items:center;flex-wrap:wrap;gap:10px}.save-line button{font-size:13px}footer{font-size:13px;color:#486f88;padding:7px 2px 30px}footer label{display:inline-flex;align-items:center;gap:7px;min-height:44px}footer input{width:20px;height:20px}footer p{margin-top:10px}footer a{display:inline-block;margin-right:15px;padding:10px 0}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.celebrate .animal{animation:happy .5s ease-out}.celebrate .ribbon{animation:pop .4s ease-out}@keyframes happy{50%{transform:translateY(-5px) rotate(4deg)}}@keyframes pop{0%{transform:scale(.5)}70%{transform:scale(1.15)}}
@media(max-width:850px){main{padding:18px 15px}.hero{grid-template-columns:1fr 200px;padding:26px}.hero-art .animal{width:110px}.hero-art .bag-art{width:90px}.workbench{grid-template-columns:190px 1fr;padding:15px;gap:14px}.snack-grid{grid-template-columns:repeat(4,var(--dp-snack))}.targets{grid-template-columns:repeat(2,minmax(0,1fr))}.mode-grid{gap:14px}.mode-card{padding:20px}.actions{grid-template-columns:1fr}.judge{width:100%}}
@media(max-width:580px){main{padding:14px 12px}.hero{padding:21px 22px;grid-template-columns:1fr}.hero-art{display:none}.hero p{font-size:15px}.hero h1{font-size:31px}.mode-grid{grid-template-columns:1fr;gap:13px;margin:17px 0}.mode-card{padding:20px}.mode-card p{min-height:0;font-size:15px}.mode-actions{gap:8px}.mode-actions button{flex-basis:115px;font-size:15px;padding:8px 10px}.mode-card h2{font-size:21px}.panel{padding:20px;border-radius:22px}.play-top{gap:8px;flex-wrap:wrap}.play-top button{padding:8px 12px}.play-top span{font-size:13px}.play-top strong{font-size:15px}.progress-track{margin-bottom:13px}.question{font-size:19px}.order{gap:6px}.order span{font-size:13px;padding:5px 9px}.workbench{display:block;padding:12px;border-radius:20px}.tray{margin-bottom:17px;padding:10px 8px}.tray h3{display:inline;font-size:16px}.tray .tray-count{display:inline;margin:0 0 0 12px;font-size:15px}.tray-count strong{font-size:23px}.tray{text-align:center}.snack-grid{grid-template-columns:repeat(6,var(--dp-snack));min-height:36px;margin-top:6px}.empty-tray{height:40px}.targets{gap:17px 10px}.dish{padding:10px 3px;min-height:84px}.animal{width:62px;height:62px}.target-buttons button{font-size:15px}.target-title{font-size:12px}.target-number{font-size:13px}.target-tools{margin-bottom:15px}.target-tools button{font-size:15px;padding:8px 13px}.no-bags{min-height:165px;padding:20px}.helpers{display:grid;grid-template-columns:1fr 1fr}.helpers button:first-child{grid-column:1/-1}.actions{gap:12px;margin-top:14px}.helpers button{font-size:14px}.feedback{padding:16px 13px}.feedback h3{font-size:21px}.feedback p{font-size:16px}.equation{gap:6px;font-size:24px;flex-wrap:nowrap}.equation .number{min-width:0;flex:1;padding:7px 3px}.equation small{font-size:11px}.next-row .primary{width:100%;min-width:0}.next-row button{width:100%}.result-cards{grid-template-columns:1fr}.result-actions{display:grid;grid-template-columns:1fr}.result-actions a{min-height:44px;display:flex;align-items:center;justify-content:center}.result-score{font-size:42px}.save-line{padding-top:20px}.practice-note{font-size:14px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}body[data-reduce-motion="true"] *,body[data-reduce-motion="true"] *:before{animation:none!important;transition:none!important}

/* After judging, keep the counted layout and leave room for the explanation. */
.finished .target-buttons,.finished .remove-bag,.finished .target-tools button,.finished .actions{display:none}.finished .target-count{margin-bottom:0}.finished .target-tools{margin-bottom:14px}