:root{--ink:#172f32;--muted:#596e70;--green:#007d67;--mint:#e4f5ed;--paper:#f7f9f5;--line:#d8e3dc;--yellow:#f6ce59;--red:#a22e39;--shadow:0 12px 36px #233d3010;color-scheme:light;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Hiragino Sans","Noto Sans JP",sans-serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0}button,input{font:inherit}button{cursor:pointer;touch-action:manipulation}button:disabled{cursor:default}button,a,input{ -webkit-tap-highlight-color:transparent}button:focus-visible,summary:focus-visible,input:focus-visible+span{outline:3px solid var(--green);outline-offset:5px}[hidden]{display:none!important}.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px}.brand-mark{display:grid;place-items:center;background:var(--green);color:white;width:32px;height:32px;border-radius:11px;font-weight:900;font-size:30px;line-height:1;padding-bottom:5px}.edition{font-size:16px;color:var(--muted)}main{max-width:1000px;margin:auto;padding:30px 28px}.intro{display:grid;grid-template-columns:1.3fr 1fr;align-items:center;gap:30px 24px}.eyebrow{font-size:14px;font-weight:800;letter-spacing:.16em;color:var(--green);margin:0 0 18px}h1{font-size:clamp(28px,4.5vw,46px);line-height:1.5;letter-spacing:.01em;margin:0 0 20px}h1 span{color:var(--green)}.lead{font-size:18px;line-height:2;color:var(--muted);margin:0}.facts{display:flex;gap:14px;margin-top:24px;font-size:16px;font-weight:700}.facts span::before{content:"✓";color:var(--green);margin-right:5px}.hero-art{height:310px;position:relative;display:grid;place-items:center;isolation:isolate}.orbit{position:absolute;width:270px;height:270px;border:1px solid #c4dbcd;border-radius:50%;z-index:-1}.orbit-one{background:var(--mint)}.orbit-two{width:310px;height:310px;border-style:dashed;transform:rotate(-15deg)}.hero-art img{object-fit:contain;position:absolute;top:16px;right:6%;transform:rotate(8deg);width:125px;height:125px}.sixty{display:flex;align-items:center;flex-direction:column;transform:rotate(-7deg);margin-top:-10px}.sixty b{font-size:116px;line-height:1.1;letter-spacing:-.08em;color:var(--green);font-weight:850}.sixty span{font-size:14px;font-weight:800;letter-spacing:.3em}.art-note{position:absolute;bottom:17px;font-size:16px;background:var(--yellow);padding:9px 17px;border-radius:24px;transform:rotate(-5deg)}.spark{position:absolute;color:var(--green);font-size:36px}.spark-one{left:10%;top:50px}.spark-two{right:7%;bottom:65px;color:#b58118}.setup{grid-column:1/-1;padding:28px;background:white;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-weight:800;font-size:20px;padding:0;margin-bottom:20px}.step{font-size:16px;color:var(--green);margin-right:7px}.courses{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.courses label{position:relative;cursor:pointer}.courses input{position:absolute;opacity:0;width:1px;height:1px}.courses label>span{display:block;padding:16px 8px;border:1.5px solid var(--line);border-radius:14px;text-align:center;font-size:18px;font-weight:750}.courses small{display:block;font-size:13px;font-weight:400;color:var(--muted);margin-top:7px}.courses input:checked+span{border-color:var(--green);background:var(--mint);color:var(--green);box-shadow:inset 0 0 0 1px var(--green)}.start-row{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:26px}.start-row p{margin:0 0 6px;font-weight:700;font-size:18px}.start-row small{font-size:14px;color:var(--muted)}.primary{border:0;background:var(--green);color:white;font-size:18px;font-weight:750;padding:18px 24px;border-radius:14px;box-shadow:0 4px 0 #005342;display:inline-flex;align-items:center;justify-content:center;gap:24px;min-height:52px}.primary:hover{background:#006653}.primary:active{transform:translateY(2px);box-shadow:0 2px 0 #005342}.primary:disabled{opacity:.6}.footnote{font-size:14px;color:var(--muted);line-height:1.9;grid-column:1/-1;text-align:center;margin:0}.setup [role=status]{font-size:16px;color:var(--red);margin:12px 0 0}.setup [role=status]:empty{display:none}.play{max-width:560px;margin:0 auto}.play-head{display:flex;align-items:center;justify-content:space-between}.play-head .eyebrow{margin-bottom:6px;font-size:12px}.play-head h2{font-size:20px;margin:0}.quiet{border:0;background:transparent;color:var(--muted);font-size:16px;padding:12px;min-height:44px;border-radius:8px}.quiet:hover{background:var(--mint)}.dashboard{display:grid;grid-template-columns:1fr 1.4fr 1fr;align-items:center;margin:22px 0 16px;height:72px}.metric-label{display:block;color:var(--muted);font-size:14px;margin-bottom:4px}.dashboard b{font-variant-numeric:tabular-nums;font-size:36px;line-height:1}.unit{font-size:16px;margin-left:5px}.combo{text-align:center;color:var(--green);position:relative}.combo strong{font-size:25px;display:block;line-height:1.5}.combo small{font-size:13px;display:block}.combo.burst::before,.combo.burst::after{content:"✦";position:absolute;top:0;font-size:28px;color:#b58118;animation:spark .55s ease-out both;pointer-events:none}.combo.burst::before{left:0}.combo.burst::after{right:0}.timer{justify-self:end;border:4px solid #cee4d8;border-radius:50%;width:68px;height:68px;display:flex;align-items:center;justify-content:center;gap:3px}.timer b{font-size:28px}.timer span{font-size:13px}.timer.urgent{border-color:#d8a34d;color:#835308}.time-track{height:5px;background:var(--line);border-radius:10px;overflow:hidden}.time-track div{height:100%;width:100%;background:var(--green);transform-origin:left}.question-panel{min-height:176px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:18px 8px}.question-panel>p:first-child{font-size:14px;color:var(--muted);margin:0 0 13px}#word{font-size:clamp(36px,7vw,52px);line-height:1.2;text-align:center;overflow-wrap:anywhere;letter-spacing:.015em;margin:0;font-weight:750;outline:none}.instruction{color:var(--muted);font-size:16px;margin:16px 0 0}.choices{display:grid;gap:12px}.choice{background:white;border:1.5px solid var(--line);border-bottom-width:4px;border-radius:15px;min-height:64px;display:flex;align-items:center;text-align:left;padding:12px 16px;gap:15px;color:var(--ink);font-size:22px;font-weight:700;transition:background .12s,border-color .12s}.choice span{font-size:14px;border:1px solid var(--line);border-radius:6px;min-width:25px;height:25px;display:grid;place-items:center;font-weight:500;color:var(--muted)}.choice:hover:not(:disabled){border-color:var(--green);background:#f4fcf8}.choice.correct{background:var(--mint);border-color:var(--green)}.choice.wrong{background:#fff0ef;border-color:#bf6168}.feedback{height:42px;display:grid;place-items:center;font-size:16px;font-weight:700;color:var(--green);text-align:center}.feedback.wrong{color:var(--red)}.play-actions{display:flex;align-items:center;justify-content:space-between}.keyboard-hint{text-align:center;font-size:13px;color:var(--muted);margin:12px 0 0}.result{max-width:650px;margin:auto;text-align:center}.result h1{font-size:36px;outline:none}.result-level{padding:30px 20px;background:var(--mint);border:1px solid #c2dfcd;border-radius:24px;margin:24px 0}.result-level>span{font-size:16px;color:var(--muted)}.result-level strong{display:block;font-size:clamp(30px,5vw,44px);margin:14px 0;color:var(--green)}.result-level p{font-size:16px;line-height:1.8;margin:0}.result-stats{display:grid;grid-template-columns:repeat(4,1fr);margin:24px 0;gap:8px}.result-stats b{display:block;font-size:28px;font-variant-numeric:tabular-nums;margin-bottom:9px}.result-stats span{font-size:13px;color:var(--muted)}details{margin:28px 0;text-align:left;border:1px solid var(--line);background:white;border-radius:16px;padding:18px}summary{cursor:pointer;font-size:18px;font-weight:700;min-height:24px}#review-count{font-size:14px;color:var(--muted)}#review-list{list-style:none;padding:0;margin:15px 0 0;max-height:330px;overflow:auto}#review-list li{display:grid;grid-template-columns:24px 1fr 1fr;gap:10px;padding:12px 0;border-top:1px solid var(--line);font-size:16px;align-items:center;overflow-wrap:anywhere}#review-list .ok{color:var(--green)}#review-list .miss{color:var(--red)}dialog{border:1px solid var(--line);border-radius:20px;max-width:calc(100% - 40px);padding:28px;box-shadow:var(--shadow)}dialog h2{font-size:24px}dialog p{font-size:16px;color:var(--muted)}dialog::backdrop{background:#132c3266}.dialog-actions{display:flex;gap:18px;margin-top:25px}.noscript{padding:24px;background:white;border:1px solid var(--red)}@keyframes spark{from{opacity:1;transform:scale(.6) translateY(5px)}to{opacity:0;transform:scale(1.4) translateY(-15px)}}@media(max-width:700px){main{padding:16px 20px}.intro{gap:20px;grid-template-columns:1fr}.intro-copy{z-index:1}.intro-copy h1{font-size:36px;line-height:1.5}.hero-art{display:none}.eyebrow{font-size:12px;margin-bottom:12px}.lead{font-size:16px}.facts{margin-top:16px}.setup{padding:20px 16px;border-radius:20px}.courses{grid-template-columns:repeat(2,1fr);gap:8px}.courses label:last-child{grid-column:1/-1}.courses label>span{padding:12px 6px;font-size:16px}.courses label:last-child small{display:inline;margin-left:12px}.start-row{flex-direction:column;align-items:stretch;margin-top:20px;gap:16px}.start-row>div{text-align:center}.primary{width:100%;gap:16px;padding:16px}.footnote{font-size:13px}.play .dashboard{margin-top:18px}.result-stats{grid-template-columns:repeat(2,1fr);gap:22px 12px}.result h1{font-size:30px}.dialog-actions .primary{width:auto}.keyboard-hint{display:none}}@media(max-height:730px){.play .dashboard{margin:12px 0 10px;height:60px}.timer{width:58px;height:58px}.question-panel{min-height:145px}.choice{min-height:56px}.choices{gap:9px}.play-head .eyebrow{display:none}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}

.brand img{height:26px;width:auto;filter:drop-shadow(0 0 1px #fff)}
@media(max-height:730px){.is-playing .header,.is-playing footer{display:none}.is-playing main{padding-top:12px;padding-bottom:12px}.is-playing .question-panel{min-height:110px}.is-playing .feedback{height:34px}.is-playing .choice{min-height:52px}}
.orbit-two{width:min(310px,100%);height:auto;aspect-ratio:1;transform:none}

/* 大きい文字でも長い選択肢・説明を切らずに表示する。 */
.facts{flex-wrap:wrap}.choice{overflow-wrap:anywhere}.choice span{flex-shrink:0}.feedback{height:auto;min-height:42px;padding:6px 0}.play-head{gap:12px}.play-head h2{overflow-wrap:anywhere}.play-head .quiet{flex-shrink:0}.dialog-actions{flex-wrap:wrap}.dashboard{min-height:76px}.timer{flex-shrink:0}.combo small{line-height:1.4}

/* 診断と辞典を往復する。診断中は外部へのリンクを隠す。 */
.brand{color:var(--ink);text-decoration:none}.diagnosis-nav{max-width:1000px;margin:auto;padding:0 28px;display:flex;flex-wrap:wrap;gap:8px 20px}.diagnosis-nav a,.next-study a{color:var(--green);font-size:16px;text-underline-offset:4px;display:inline-flex;align-items:center;min-height:44px}.is-playing .diagnosis-nav{display:none}.next-study{margin:24px 0;padding:20px;border:1px solid var(--line);border-radius:16px;background:white;display:flex;flex-direction:column;align-items:center;gap:8px}.next-study h2{font-size:20px;margin:0 0 6px}@media(max-width:700px){.diagnosis-nav{padding:0 20px;gap:4px 16px}}

.language-setting{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:24px;font-size:18px;font-weight:700}.language-setting select{font:inherit;padding:10px 16px;border:1px solid var(--line);border-radius:12px;background:white;color:var(--ink);min-height:48px}#multilingual-course{font-size:18px;line-height:1.8;margin:0}