:root{font-family: -apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Noto Sans JP",Meiryo,sans-serif;color:#263542;background:#f7f8fa;font-synthesis:none;--green:#18856c;--muted:#7d8793;--border:#e6e9ec}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #59bbaa;outline-offset:4px}button:disabled{cursor:default;opacity:.35}[hidden]{display:none!important}
.site-header{height:82px;border-bottom:1px solid var(--border);display:flex;align-items:center;gap:32px;padding:0 max(32px,calc((100vw - 1200px)/2));background:#fff}.brand{display:flex;gap:11px;align-items:center;text-decoration:none;color:#263542;font-size:18px;font-weight:750;white-space:nowrap}.brand-mark{width:28px;height:28px;display:flex;gap:3px;align-items:end}.brand-mark i{width:7px;background:var(--green);border-radius:3px;height:17px}.brand-mark i:nth-child(2){height:27px}.brand-mark i:nth-child(3){height:22px}.header-note{font-size:11px;letter-spacing:.07em;color:var(--muted)}.help-link{margin-left:auto;background:none;border:none;color:#66727c;font-size:12px;padding:12px}.help-link span{margin-left:12px}
main{max-width:1200px;margin:auto;padding:44px 24px 0}.eyebrow{font-size:10px;letter-spacing:.17em;font-weight:700;color:#8a949e}.intro .eyebrow{color:var(--green);display:flex;gap:7px;align-items:center}.intro .eyebrow span{width:6px;height:6px;background:var(--green);border-radius:50%}h1{font-size:34px;letter-spacing:.035em;margin:13px 0 12px;font-weight:750;line-height:1.5}.intro p{color:#7b8591;font-size:13px;line-height:1.9;margin:0}.mobile-break{display:none}.mode-tabs{display:grid;grid-template-columns:repeat(4,1fr);margin:33px 0 20px;padding:6px;background:#edf0f2;border-radius:12px;gap:6px}.mode-tabs button{border:1px solid transparent;border-radius:8px;background:transparent;color:#6c7784;min-height:73px;text-align:left;padding:12px 18px;font-weight:700;font-size:14px;position:relative}.mode-tabs button[aria-pressed=true]{background:#fff;color:var(--green);border-color:#e4e9e7;box-shadow:0 2px 5px #243b3210}.mode-number{font-size:11px;opacity:.65;margin-right:10px;font-weight:500}.mode-sub{display:block;font-size:10px;margin:6px 0 0 26px;font-weight:400;color:#89929c;letter-spacing:.03em}.settings{display:flex;align-items:center;gap:24px;padding:16px 20px;background:#fff;border:1px solid var(--border);border-radius:10px;flex-wrap:wrap}.settings-title{font-size:12px;font-weight:650;padding-right:20px;border-right:1px solid var(--border)}.settings-title>span{color:#85929b;margin-right:6px}.settings label,.range-settings{display:flex;align-items:center;gap:10px;color:#6e7985;font-size:12px}.settings input,.settings select{width:65px;height:37px;border:1px solid #dfe4e8;border-radius:6px;text-align:center;background:#fafbfc;color:#344351;font-size:13px}.range-settings input{width:76px}.settings .primary{margin-left:auto}.button{border-radius:7px;min-height:40px;padding:10px 17px;display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:600;font-size:12px;border:1px solid #e0e5e8;background:#fff;color:#65727e}.primary{background:var(--green);color:#fff;border-color:var(--green);box-shadow:0 2px 3px #18856c14}.primary:hover{background:#126e59}.error{font-size:12px;color:#b64334;margin:0;flex-basis:100%}.error:empty{display:none}
.game-layout{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(320px,1fr);gap:22px;margin-top:22px;align-items:start}.card{border:1px solid var(--border);background:#fff;border-radius:12px;box-shadow:0 3px 6px #26354202}.plot-card{padding:25px 26px 18px;min-width:0}.card-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}h2{font-size:18px;margin:8px 0 0;letter-spacing:.025em}.count-badge{background:#f3f5f7;border:1px solid #e8ecef;color:#7d8791;font-size:10px;padding:6px 10px;border-radius:20px;white-space:nowrap}.plot-instruction{display:flex;gap:9px;align-items:center;margin:23px 0 5px;font-size:11px;color:#8b96a1}.drag-icon{color:var(--green);font-size:19px}.plot-scroll{max-height:430px;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:#c9d8d3 #f8faf9;padding-top:4px}.plot{position:relative;min-width:100%;transition:height .16s}.grid-line{position:absolute;top:14px;bottom:40px;border-left:1px dashed #e9eef0;pointer-events:none}.tick{position:absolute;bottom:32px;width:1px;height:8px;background:#cbd4d9}.tick>span{position:absolute;top:15px;left:50%;transform:translateX(-50%);font-size:11px;color:#87929e;white-space:nowrap;font-variant-numeric:tabular-nums}#axis:before{content:"";position:absolute;bottom:40px;left:34px;right:34px;height:1px;background:#cbd4d9}.dot{position:absolute;width:30px;height:30px;transform:translateX(-50%);padding:0;border:0;background:transparent;border-radius:50%;touch-action:none;z-index:2;cursor:grab;transition:left .12s,bottom .12s;outline-offset:0!important}.dot:before{content:"";position:absolute;inset:4px;border:2px solid #fff;border-radius:50%;background:#369987;box-shadow:0 1px 3px #18856c22;transition:background .15s,box-shadow .15s}.dot:hover:before{background:#14735e}.dot.moved:before{background:#217eaf}.dot.selected:before{box-shadow:0 0 0 3px #a9d9ca;background:#176e59}.dot.dragging{cursor:grabbing;z-index:5;transition:none}.dot.dragging:before{background:#12654f;box-shadow:0 0 0 5px #18856c22}.plot-footer{display:flex;gap:12px;align-items:center;justify-content:space-between;font-size:10px;color:#929ba4;margin-top:20px;border-top:1px solid #eef0f2;padding-top:16px}.plot-footer>span:first-child{display:flex;gap:7px;align-items:center}.plot-footer>span:last-child{white-space:nowrap}.legend-dot{width:7px;height:7px;border-radius:50%;background:#369987;flex-shrink:0}.point-controls{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:16px}.nudge-controls{display:flex;align-items:center;gap:12px;font-size:11px;color:#64727e}.icon-button{width:40px;height:40px;border:1px solid #e1e7e7;border-radius:7px;background:#f9fbfa;color:#18856c;font-size:18px}.reset{font-weight:400}.reset span{font-size:18px}.reference{margin-top:16px;background:#f3f7f6;border-radius:6px;padding:12px;font-size:11px;color:#5e7d73;line-height:1.8}.boxplot{margin-top:6px}.boxplot svg{display:block;overflow:visible}.boxplot line{stroke:#31947e;stroke-width:1.5}.boxplot rect{fill:#e5f3ee;stroke:#31947e;stroke-width:1.5}.boxplot .median-line{stroke-width:2.5}.box-caption{fill:#7b8b86;font-size:10px;font-family:inherit}
.target-card{padding:25px 24px 20px}.target-icon{font-size:29px;color:#89b3a6;font-weight:300}.target-intro{font-size:11px;color:#8a949e;margin:17px 0 22px}.stat-table-head,.stat-row{display:grid;grid-template-columns:minmax(90px,1.15fr) minmax(50px,1fr) minmax(50px,1fr) 17px;align-items:center;gap:8px}.stat-table-head{font-size:10px;color:#9aa2ab;padding:0 0 12px;border-bottom:1px solid var(--border)}.stat-table-head>span:nth-child(2),.stat-table-head>span:nth-child(3){text-align:center}.stat-row{min-height:66px;border-bottom:1px solid #edf0f2;padding:12px 0}.stat-label{font-size:12px;color:#687681;line-height:1.6}.stat-row strong{font-size:19px;text-align:center;font-weight:650;overflow-wrap:anywhere;line-height:1.5;font-variant-numeric:tabular-nums;max-height:150px;overflow:auto}.stat-row .target-value{color:#263542}.current-value{color:#8a939d}.stat-row.matched .current-value{color:var(--green)}.match{color:#c5cbd0;text-align:center;font-size:14px}.matched .match{color:var(--green);font-weight:700}.progress-heading{display:flex;justify-content:space-between;font-size:10px;color:#9099a2;margin-top:25px}.progress-heading strong{color:var(--green);font-size:11px}.progress-track{height:5px;background:#eef2f1;border-radius:8px;margin-top:10px;overflow:hidden}#progress-bar{height:100%;background:#329a7f;border-radius:8px;transition:width .2s}.status{font-size:10px;color:#8d979f;text-align:center;margin-top:13px;min-height:20px;line-height:1.7}.status.clear{background:#e5f6ed;color:#127153;border-radius:8px;padding:12px 6px;font-size:15px;font-weight:750;animation:celebrate .4s ease-out}.target-note{display:flex;align-items:center;gap:10px;background:#f8faf9;border:1px solid #edf1ef;border-radius:7px;padding:9px 13px;margin-top:19px}.target-note>span{font-size:22px;color:#8ba99e}.target-note p{color:#8b9892;font-size:10px;line-height:1.9;margin:0}
.learning{margin-top:24px;padding:0 24px}.learning summary{list-style:none;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-size:13px;font-weight:600;min-height:64px}.learning summary::-webkit-details-marker{display:none}.book-icon{font-size:18px;color:#90a198;margin-right:10px}.chevron{color:#8a98a0}.learning-content{display:grid;grid-template-columns:1fr 1.3fr;gap:36px;padding:0 0 23px}.learning-content>div+div{border-left:1px solid #edf0f2;padding-left:30px}h3{font-size:12px;margin:6px 0 10px;color:#52675d}.learning-content p{font-size:11px;color:#87908d;line-height:2;margin:8px 0}.learning-content b{font-weight:600;color:#657b70}.definition{padding-top:8px;border-top:1px solid var(--border)}footer{display:flex;justify-content:space-between;gap:20px;padding:26px 0 28px;color:#a9afb5;font-size:10px}.footer-brand{font-weight:600;letter-spacing:.06em}@keyframes celebrate{from{transform:scale(.95);opacity:.4}to{transform:scale(1);opacity:1}}
@media(min-width:1400px){main{padding-top:50px}.intro{margin-bottom:38px}.plot{min-height:260px}}
@media(max-width:1000px){.settings{gap:16px}.settings-title{display:none}.game-layout{grid-template-columns:minmax(0,1.4fr) minmax(300px,1fr)}.plot-card{padding:22px 18px 18px}.mode-tabs button{padding:12px}.header-note{display:none}.stat-row strong{font-size:17px}}
@media(max-width:760px){.site-header{height:66px;padding:0 20px}.brand{font-size:16px}.help-link{font-size:11px;padding-right:0}main{padding:28px 16px 0}h1{font-size:27px;line-height:1.55}.intro p{font-size:11px}.mode-tabs{margin-top:24px;gap:4px;padding:4px}.mode-tabs button{font-size:12px;min-height:65px;padding:10px 4px;text-align:center}.mode-number{display:block;font-size:9px;margin:0 0 5px}.mode-sub{display:none}.settings{padding:14px;gap:12px}.settings label,.range-settings{font-size:11px;gap:6px}.settings input,.settings select{width:52px;min-height:40px}.range-settings input{width:60px}.settings .primary{width:100%;min-height:44px}.game-layout{grid-template-columns:1fr;gap:16px;margin-top:16px}.plot-card{padding:20px 16px 16px}.plot-instruction{font-size:10px;margin-top:18px}.plot-footer{font-size:9px}.plot-scroll{max-height:370px}.target-card{padding:22px 20px}.target-intro{margin:12px 0 20px}.stat-row{min-height:57px}.stat-row strong{font-size:20px}.target-note{margin-top:12px}.learning{padding:0 18px;margin-top:16px}.learning-content{grid-template-columns:1fr;gap:10px}.learning-content>div+div{border-left:0;border-top:1px solid #edf0f2;padding:14px 0 0}.learning-content p{font-size:12px}.learning summary{font-size:12px}.point-controls .button,.icon-button{min-height:44px;min-width:44px}footer{font-size:9px;line-height:1.8}.stat-table-head,.stat-row{grid-template-columns:minmax(95px,1.2fr) minmax(60px,1fr) minmax(60px,1fr) 20px}}
@media(max-width:370px){.mobile-break{display:block}.brand{font-size:14px}.settings{padding:12px 8px;gap:10px}.settings label,.range-settings{gap:4px}.settings input{width:48px}.range-settings input{width:52px}.nudge-controls{gap:6px}.plot-footer{align-items:flex-start}.plot-footer>span:first-child{line-height:1.7}}
@media(prefers-reduced-motion:reduce){*,*:before{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

.count-options{display:flex;gap:6px;align-items:center;font-size:12px;color:#6e7985}.count-options>span{margin-right:4px}.count-options button{min-height:40px;min-width:48px;border:1px solid #dfe4e8;border-radius:6px;background:#fafbfc;color:#6e7985;font-size:12px}.count-options button[aria-pressed=true]{background:#e8f5ef;color:#16765d;border-color:#9bc9b8}

@media(max-width:760px){.mobile-break{display:block}.count-options button{min-height:44px}}

/* The full integer range always shares the available width. */
.range-settings button{min-width:58px;min-height:44px;padding:8px 10px;border:1px solid #dfe4e8;border-radius:6px;background:#fafbfc;color:#6e7985;font-size:12px;white-space:nowrap}
.range-settings button[aria-pressed=true]{background:#e8f5ef;color:#16765d;border-color:#9bc9b8}
.plot-scroll{max-height:none;overflow:hidden;padding-top:4px}
.plot{min-height:0;min-width:0;width:100%;transition:none;touch-action:pan-y}
#axis:before{left:24px;right:24px}
.tick.minor{height:4px;bottom:36px;background:#e0e5e8}
.dot{width:var(--hit-size,32px);height:var(--hit-size,32px);transform:translate(-50%,-50%);transition:none}
.dot:before{inset:auto;left:50%;top:50%;transform:translate(-50%,-50%);width:var(--dot-size,24px);height:var(--dot-size,24px);border:0;box-shadow:none}
.dot.selected{z-index:3}
.dot.selected:before{width:max(10px,var(--dot-size));height:max(10px,var(--dot-size));box-shadow:0 0 0 2px #fff,0 0 0 4px #a9d9ca}
.dot.dragging:before{box-shadow:0 0 0 2px #fff,0 0 0 5px #18856c40}
.boxplot svg{max-width:100%;overflow:hidden}
@media(max-width:760px){.range-settings{width:100%;flex-wrap:wrap}.range-settings button{flex:1}.settings .range-settings{gap:6px}}

.point-controls{flex-wrap:wrap}.button,#selected-value{white-space:nowrap}.reset{margin-left:auto}.nudge-controls{flex-shrink:0}

/* Adaptive axis insets are shared by ticks, dots, and box-plot geometry. */
#axis:before{left:var(--axis-inset,24px);right:var(--axis-inset,24px)}
.target-card.all-matched{border-color:#91c6af;box-shadow:0 0 0 3px #e8f5ef}
.all-matched .stat-row{background:#f1faf5;border-bottom-color:#dceee3}
.clear-dialog{width:min(440px,calc(100vw - 32px));max-height:calc(100dvh - 32px);padding:32px 28px 22px;border:1px solid #c9dfd3;border-radius:20px;background:#fcfefb;color:#263542;text-align:center;box-shadow:0 24px 90px #193d3340;overflow:auto;overscroll-behavior:contain}
.clear-dialog[open]{animation:clear-arrive .24s ease-out}
.clear-dialog::backdrop{background:#1c342f66;backdrop-filter:blur(3px)}
.clear-close{position:absolute;right:8px;top:8px;width:44px;height:44px;border:none;border-radius:50%;background:transparent;font-size:25px;color:#729284}
.clear-close:hover{background:#edf5ef}
.clear-emblem{display:grid;place-items:center;width:56px;height:56px;margin:0 auto 16px;border-radius:50%;background:#e6f3e9;color:#238065;font-size:30px;box-shadow:0 0 0 7px #f2f8f1}
.clear-dialog .eyebrow{color:#609581;font-size:10px}
.clear-dialog h2{font-size:clamp(38px,10vw,54px);line-height:1.1;letter-spacing:.07em;color:#187558;margin:9px 0 13px}
#clear-description{font-size:13px;line-height:1.9;color:#627c6e;margin:0 0 18px}
.clear-stats{list-style:none;margin:0;padding:0;border:1px solid #dcebe0;border-radius:10px;background:#f0f8f1;overflow:hidden}
.clear-stats li{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr) auto;align-items:center;gap:8px;padding:10px 12px;border-bottom:1px solid #dcebe0;text-align:left;font-size:11px;line-height:1.5}
.clear-stats li:last-child{border-bottom:0}
.clear-stats strong{font-size:16px;color:#286d53;overflow-wrap:anywhere;text-align:right;font-variant-numeric:tabular-nums}
.clear-check{color:#238065;font-size:11px;white-space:nowrap}
.clear-moves{font-size:11px;color:#84978c;margin:17px 0}
.clear-actions{display:flex;gap:10px;position:relative}
.clear-actions .button{flex:1;min-height:48px;padding:12px 8px;font-size:13px}
.clear-footnote{font-size:10px;color:#91a096;line-height:1.7;margin:14px 0 0}
.confetti{position:absolute;inset:0;overflow:hidden;pointer-events:none;border-radius:inherit}
.confetti i{position:absolute;top:-14px;left:var(--x);width:6px;height:11px;border-radius:2px;background:var(--paper);opacity:0;animation:paper-fall 1.7s var(--delay) ease-out forwards}
@keyframes paper-fall{0%{opacity:0;transform:translate(0,-10px) rotate(0)}15%{opacity:.85}75%{opacity:.6}100%{opacity:0;transform:translate(var(--drift),340px) rotate(var(--turn))}}
@keyframes clear-arrive{from{opacity:0;transform:translateY(10px) scale(.97)}to{opacity:1;transform:none}}
@media(max-width:370px){.clear-dialog{padding:27px 16px 18px}.clear-stats li{padding:9px 8px;gap:5px}.clear-stats strong{font-size:14px}.clear-actions .button{font-size:12px}}
@media(prefers-reduced-motion:reduce){.confetti{display:none}.clear-dialog[open]{animation:none}}