:root{--ink:#243744;--muted:#566b77;--green:#196452;--line:#d9e3dd;--paper:#faf9f5}.access-shell{place-items:center;min-height:100svh;padding:24px;display:grid}.access-card{border:1px solid var(--line);background:#fff;border-radius:24px;width:min(100%,460px);padding:38px;box-shadow:0 16px 50px #2437440c}.access-symbol{font-size:2.8rem}.access-card h1{margin:10px 0;font-size:clamp(1.5rem,5vw,2rem)}.access-description{color:var(--muted)}.access-card form{margin-top:24px}.access-card label{margin-bottom:8px;font-weight:700;display:block}.access-card input{background:#fff;border:1px solid #8aa199;border-radius:8px;width:100%;padding:12px}.access-card input[aria-invalid=true]{border-color:#a03b27}.access-card button{color:#fff;background:var(--green);border:0;border-radius:8px;width:100%;margin-top:16px;padding:12px;font-weight:700}.access-card button:disabled{opacity:.65;cursor:wait}.access-status{color:#923b2b;min-height:3.7em;margin-top:12px;font-size:.9rem}.access-note{color:var(--muted);border-top:1px solid var(--line);padding-top:16px;font-size:.85rem}.lock-guide{border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 12px;font-size:.85rem}@media (width<=600px){.access-shell{padding:16px}.access-card{padding:28px 22px}.site-header{flex-wrap:wrap;gap:12px}}@media print{.lock-guide{display:none!important}}*{box-sizing:border-box}body{background:var(--paper);color:var(--ink);margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans JP,sans-serif;line-height:1.85}a{color:var(--green);text-underline-offset:4px}button,input{font:inherit}button,summary{cursor:pointer}button{color:var(--ink)}[hidden]{display:none!important}:focus-visible{outline-offset:4px;outline:3px solid #c57b20}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.5}h1{letter-spacing:.03em;font-size:clamp(2rem,4vw,3.5rem)}h2{font-size:clamp(1.45rem,2.7vw,2rem)}h3{font-size:1.12rem}ul,ol{padding-left:1.4rem}li+li{margin-top:.5rem}code,pre{font-family:SFMono-Regular,Consolas,monospace}code{overflow-wrap:anywhere;background:#eaf0eb;border-radius:4px;padding:.1em .3em}pre{color:#f1f5f2;white-space:pre-wrap;overflow-wrap:anywhere;background:#1e303c;border-radius:12px;padding:1.25rem;font-size:.9rem;line-height:1.7}.skip-link{z-index:10;background:#fff;padding:.5rem 1rem;position:absolute;top:-5rem;left:1rem}.skip-link:focus{top:.5rem}.site-header{border-bottom:1px solid var(--line);background:#fff;justify-content:space-between;align-items:center;gap:1rem;padding:1rem max(1.25rem,50vw - 620px);display:flex}.brand{color:var(--ink);align-items:center;gap:.75rem;font-weight:750;line-height:1.5;text-decoration:none;display:flex}.brand>span:first-child{font-size:2rem}.brand small{color:var(--muted);font-size:.75rem;font-weight:500;display:block}main{max-width:1240px;margin:auto;padding:0 1.5rem}.hero{grid-template-columns:1.4fr 1fr;align-items:center;gap:4rem;padding:4rem 0 3rem;display:grid}.eyebrow{color:var(--green);letter-spacing:.12em;margin-bottom:.75rem;font-size:.78rem;font-weight:750}.hero-description{max-width:640px;color:var(--muted);margin:1.25rem 0 1.75rem}.hero-description strong{color:var(--ink)}.primary-link{background:var(--green);color:#fff;border-radius:8px;padding:.7rem 1.2rem;font-weight:650;text-decoration:none;display:inline-block}.hero-note{background:#edf3ed;border:1px solid #cedfd4;border-radius:18px;padding:1.7rem}.reach-list{margin:0;padding:0;list-style:none}.reach-list li{align-items:baseline;gap:1rem;padding:.75rem 0;display:flex}.reach-list li+li{border-top:1px solid #d1dfd5;margin:0}.reach-list li>span{color:var(--green);font-size:.85rem;font-weight:700}.reach-list p{color:var(--muted);font-size:.85rem}.section-nav{border-top:1px solid var(--line);border-bottom:1px solid var(--line);flex-wrap:wrap;gap:.5rem 1.5rem;padding:1rem 0;font-size:.92rem;display:flex}.section-nav a{font-weight:650;text-decoration:none}.guide-section{border-bottom:1px solid var(--line);padding:3rem 0;scroll-margin-top:1rem}.section-lead{color:var(--muted);max-width:850px;margin:1rem 0 1.6rem}.three-cards,.two-cards{gap:1.25rem;margin-top:1.5rem;display:grid}.three-cards{grid-template-columns:repeat(3,minmax(0,1fr))}.two-cards{grid-template-columns:repeat(2,minmax(0,1fr))}.info-card{border:1px solid var(--line);background:#fff;border-radius:14px;padding:1.5rem}.info-card h3{margin-bottom:.75rem}.info-card p+p{margin-top:.75rem}.badge{color:#195842;background:#e8f2eb;border-radius:6px;margin-bottom:.75rem;padding:.25rem .65rem;font-size:.75rem;font-weight:700;display:inline-block}.badge.achievement{color:#805020;background:#fcf1dd}.badge.optional{color:#5a4b87;background:#eeeaf7}.teaching-note{background:#edf3ed;border-left:4px solid #628976;border-radius:0 10px 10px 0;margin-top:1.5rem;padding:1.25rem 1.5rem}.teaching-note p{margin-top:.25rem}.small-note{color:var(--muted);font-size:.85rem}details{border:1px solid var(--line);background:#fff;border-radius:10px}summary{padding:1rem 1.25rem;font-weight:650}details>div{padding:0 1.25rem 1.25rem}details p+p{margin-top:.75rem}.lesson-workspace{grid-template-columns:260px minmax(0,1fr);align-items:start;gap:1.5rem;display:grid}.lesson-sidebar{background:#edf1ed;border-radius:14px;padding:1.1rem;position:sticky;top:1rem}.lesson-sidebar label{font-size:.85rem;font-weight:650}.lesson-sidebar input{background:#fff;border:1px solid #a7b9ad;border-radius:7px;width:100%;min-width:0;margin:.5rem 0 .75rem;padding:.65rem;font-size:.85rem}.chapter-filters{grid-template-columns:1fr 1fr;gap:.4rem;display:grid}.chapter-filters button{background:#fff;border:1px solid #c9d6ce;border-radius:5px;padding:.4rem;font-size:.82rem}.chapter-filters button[aria-pressed=true]{background:var(--green);color:#fff;border-color:var(--green)}#lessonCount{margin:.75rem 0}#lessonLinks{gap:.35rem;max-height:570px;padding:4px;display:grid;overflow-y:auto}.lesson-select{text-align:left;background:0 0;border:1px solid #0000;border-radius:7px;padding:.6rem;font-size:.86rem;line-height:1.6;display:block}.lesson-select:hover{background:#fff}.lesson-select[aria-current=true]{color:var(--green);background:#fff;border-color:#8eae9c;font-weight:750}#lessonDetail{border:1px solid var(--line);background:#fff;border-radius:14px;padding:2rem;scroll-margin-top:1rem}.lesson-tools{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.75rem;margin-bottom:.6rem;display:flex}.lesson-tools .badge{margin:0}.print-button{background:#fff;border:1px solid #b5c8bc;border-radius:6px;padding:.35rem .75rem;font-size:.8rem}.lesson-meta{color:var(--muted);margin:.5rem 0 1.3rem;font-size:.85rem}.lesson-goal{background:#edf5ef;border-radius:8px;padding:1rem;font-weight:650}.memo-section{margin-top:1.5rem}.memo-section h4{margin:0 0 .5rem;font-size:1rem}.memo-section p,.memo-section li{color:#405663}.teacher-question{background:#fcf6e9;border-left:3px solid #d3a559;margin:1.5rem 0;padding:1rem}.teacher-question strong{margin-bottom:.3rem;font-size:.85rem;display:block}.answer-details{margin:1rem 0}.answer-details table{border-collapse:collapse;width:100%;font-size:.9rem}.answer-details th,.answer-details td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:.55rem}.answer-details th:first-child{width:25%}.answer-details caption{text-align:left;margin:.5rem 0;font-weight:650}.prediction-note{background:#f2eff9;border-radius:8px;margin:1rem 0;padding:1rem}.trouble-list{gap:.7rem;margin-top:1.5rem;display:grid}.site-footer{color:var(--muted);flex-wrap:wrap;justify-content:center;gap:.75rem 1.5rem;padding:2rem 1rem;font-size:.85rem;display:flex}@media (width<=900px){.hero{gap:1.5rem}.three-cards{grid-template-columns:1fr}.lesson-workspace{grid-template-columns:220px minmax(0,1fr);gap:1rem}#lessonDetail{padding:1.25rem}}@media (width<=680px){main{padding:0 1rem}.site-header{padding:.85rem 1rem}.hero{grid-template-columns:1fr;padding:2rem 0}.hero-note{padding:1.25rem}.section-nav{gap:.6rem 1.2rem;font-size:.85rem}.guide-section{padding:2rem 0}.two-cards,.lesson-workspace{grid-template-columns:1fr}.info-card{padding:1.25rem}.lesson-sidebar{position:static}.chapter-filters{grid-template-columns:repeat(4,1fr)}#lessonLinks{max-height:230px}#lessonDetail{padding:1rem}.lesson-tools{align-items:flex-start}.answer-details th:first-child{width:30%}}@media print{body{background:#fff;font-size:10pt}.site-header,.hero,.section-nav,.lesson-sidebar,.site-footer,.print-button,.skip-link,#searchEmpty{display:none!important}.guide-section:not(#lessons),#lessons>.eyebrow,#lessons>h2,#lessons>.section-lead{display:none}main{max-width:none;padding:0}#lessons{border:none;padding:0}.lesson-workspace{display:block}#lessonDetail{border:none;padding:0}details,pre,.teacher-question{break-inside:avoid}pre{color:#000;background:#f1f1f1;font-size:9pt}.badge{border:1px solid #888}}figure{margin:0}.step-number{color:#fff;background:#196452;border-radius:50%;flex-shrink:0;place-items:center;width:1.8rem;height:1.8rem;font-size:.9rem;font-weight:750;display:inline-grid}.screen-illustration{margin:1.5rem 0}.screen-example{background:#fff;border:2px solid #b7c5d1;border-radius:14px;grid-template-columns:1fr 1.3fr;display:grid;overflow:hidden}.mock-header{color:#fff;background:#5362ae;flex-wrap:wrap;align-items:center;gap:.6rem;padding:.8rem;font-weight:650;display:flex}.mock-body{padding:1.5rem}.mock-body p{margin-top:.75rem}.mock-hp{background:#edf3fa;border:1px solid #d4deea;border-radius:8px;margin-top:1rem;padding:1rem}.mock-hint{color:#665321;background:#fff4d9;padding:.5rem}.screen-code{color:#fff;background:#22252e;min-width:0}.screen-code .mock-header{background:#313540}.mock-run{color:#fff;background:#397b39;border-radius:6px;margin-left:auto;padding:.4rem .7rem;font-size:.85rem}.screen-code pre{background:#22252e;border-radius:0;margin:0;font-size:1rem;line-height:2}mark{color:#39260a;background:#ffe49a;border-radius:3px;padding:.1rem .35rem}.mock-caption{color:#f5dda6;padding:0 1.25rem 1.25rem;font-size:.9rem}.screen-illustration>figcaption{color:var(--muted);margin-top:.5rem;font-size:.85rem}.numbered-cards .step-number{margin-bottom:.75rem}.spoken-line{color:#194f43;font-weight:650}.numbered-cards .spoken-line{margin-bottom:.65rem}.result-examples figcaption{color:#254756}.mini-battle{background:#ecf1f5;border-radius:10px;justify-content:space-around;align-items:center;margin-top:1rem;padding:1rem;font-size:2.8rem;display:flex}.mini-battle>span:nth-child(2){font-size:1.5rem}.result-pointer{color:#3d5865;margin:.8rem 0;font-size:.9rem}.example-hp{align-items:center;gap:.65rem;font-size:.85rem;display:flex}.empty-hp-bar{background:#d8e0e6;border:2px solid #536675;border-radius:8px;flex:1;height:1rem;display:block}.example-output{background:#edf3fa;border-radius:6px;flex-wrap:wrap;gap:.5rem 1rem;margin-bottom:.5rem;padding:.8rem;display:flex}.example-output span{color:var(--muted);font-size:.85rem}.coaching-flow{grid-template-columns:repeat(4,minmax(0,1fr));gap:1rem;margin:1.5rem 0;padding:0;list-style:none;display:grid}.coaching-flow li{border:1px solid var(--line);background:#fff;border-radius:12px;margin:0;padding:1.25rem}.coaching-flow strong{margin:.5rem 0;display:block}.coaching-flow p{color:var(--muted);font-size:.85rem}.teaching-cues{gap:.75rem;margin:1.5rem 0;display:grid}.teaching-cues section{background:#f7faf7;border:1px solid #d8e5dd;border-radius:10px;padding:.9rem 1.1rem}.cue-label{color:var(--green);margin-bottom:.3rem;font-size:.82rem;font-weight:750;display:block}.concept-diagram{background:#f0f4f8;border:1px solid #d1dde7;border-radius:12px;padding:1.25rem}.concept-diagram figcaption{margin-bottom:1rem;font-weight:750}.concept-nodes{flex-wrap:wrap;gap:1rem;display:flex}.concept-node{text-align:center;background:#fff;border:1px solid #bccfdb;border-radius:9px;flex:125px;min-width:0;padding:.85rem;position:relative}.concept-node>span{color:#4b6472;font-size:.78rem;display:block}.concept-node>strong{color:#204b65;overflow-wrap:anywhere;margin:.5rem 0;font-size:1.05rem;display:block}.concept-node p{color:var(--muted);overflow-wrap:anywhere;font-size:.82rem}.diagram-caption{margin-top:1rem;font-size:.9rem}.diagram-flow .concept-node+.concept-node:before{content:"→";color:#59778a;position:absolute;top:40%;left:-.9rem}.diagram-flow .concept-node{flex:1 1 0}.diagram-compare .concept-nodes,.diagram-choice .concept-nodes{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.diagram-list .concept-nodes{grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.diagram-list .concept-node:first-child{background:#fff8e9;border:2px solid #d09b38}.visual-question{text-align:center;background:#fff4dc;border:1px solid #d5b56f;border-radius:9px;max-width:260px;margin:0 auto 1rem;padding:.6rem;font-weight:750}.diagram-choice .concept-node:nth-child(2){border:2px solid #49788f}.term-guide{margin:1.25rem 0}.term-guide h4{margin:0 0 .5rem;font-size:.95rem}.term-guide dl{gap:.5rem;margin:0;display:grid}.term-guide dl>div{border-bottom:1px solid var(--line);grid-template-columns:120px minmax(0,1fr);gap:.75rem;padding:.5rem 0;font-size:.9rem;display:grid}.term-guide dt{color:#345b4c;overflow-wrap:anywhere;font-weight:750}.term-guide dd{color:var(--muted);margin:0}.edit-example{margin-top:.75rem}.edit-example>p{font-size:.85rem}.edit-pair{grid-template-columns:repeat(2,minmax(0,1fr));gap:.75rem;display:grid}.edit-pair>div{min-width:0}.edit-pair>div>span{color:var(--muted);font-size:.82rem}.edit-pair pre{margin:.25rem 0 .75rem;padding:.9rem;font-size:.85rem}@media (width<=900px){.coaching-flow{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=680px){.screen-example,.edit-pair{grid-template-columns:1fr}.screen-code pre{font-size:.9rem}.concept-diagram{padding:1rem}.diagram-flow .concept-nodes{flex-direction:column}.diagram-flow .concept-node{flex-basis:auto}.diagram-flow .concept-node+.concept-node:before{content:"↓";top:-1.25rem;left:48%}.diagram-compare .concept-nodes{grid-template-columns:1fr}.diagram-list .concept-node{padding:.5rem}.diagram-list .concept-node>strong{font-size:.88rem}.term-guide dl>div{grid-template-columns:90px minmax(0,1fr)}}@media print{.concept-diagram,.concept-node,.teaching-cues section{color:#000;background:#fff}.concept-diagram,.edit-example,.term-guide{break-inside:avoid}.diagram-flow .concept-nodes{flex-direction:row}.diagram-flow .concept-node+.concept-node:before{content:"→";top:40%;left:-.9rem}}