:root{color-scheme:light;--ink:#183448;--muted:#4f6879;--blue:#076e98;--sky:#eaf7fd;--line:#d8e7ef;--pink:#a54876;--paper:#f6fbfe;--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:20px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans JP","Yu Gothic UI","Meiryo",system-ui,sans-serif;font-size:16px;line-height:1.8}button,a,summary{-webkit-tap-highlight-color:transparent}button,textarea{font:inherit}a{color:var(--blue);text-underline-offset:4px}button,summary{cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible,textarea:focus-visible{outline:3px solid #c66c18;outline-offset:4px}.skip-link{position:absolute;top:-80px;left:16px;background:white;padding:12px;z-index:10}.skip-link:focus{top:12px}.site-header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{max-width:1240px;margin:auto;padding:20px 30px;display:flex;justify-content:space-between;align-items:center;gap:15px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink);font-size:.93rem;font-weight:800;letter-spacing:.03em}.brand-mark{display:grid;place-items:center;background:var(--blue);color:white;border-radius:11px;width:39px;height:39px;letter-spacing:-.04em;font-size:.85rem}.edition{color:var(--muted);font-size:.8rem}main{max-width:1240px;padding:0 30px;margin:auto}.intro{padding:42px 0 28px;display:flex;justify-content:space-between;align-items:center;gap:35px}.eyebrow{font-size:.8rem;letter-spacing:.08em;color:var(--blue);font-weight:700;margin:0 0 9px}h1{font-size:clamp(1.7rem,3.1vw,2.65rem);letter-spacing:-.025em;line-height:1.4;margin:0 0 14px}h2{font-size:clamp(1.4rem,2.1vw,1.85rem);line-height:1.45;margin:0}h3{line-height:1.5}.lead{color:var(--muted);margin:0}.intro-note{background:#fff;border:1px solid var(--line);border-left:4px solid var(--blue);padding:18px 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20px;font-size:.95rem}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.shot-card{background:white;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;min-width:0}.shot-card figure{margin:0;background:#eaf3f8;border-bottom:1px solid var(--line)}.shot-card img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:contain}.card-body{padding:23px}.card-meta{display:flex;gap:9px;flex-wrap:wrap;font-size:.75rem;color:var(--muted);align-items:center}.tag{padding:3px 8px;border-radius:5px;background:var(--sky);color:var(--blue)}.tag.girl{background:#fff0f6;color:var(--pink)}.shot-card h3{font-size:1.5rem;margin:9px 0 0;letter-spacing:-.02em}.english{font-size:.875rem;color:var(--muted);margin:1px 0 13px}.definition{margin:0 0 15px;min-height:3.6em}.use-case{background:#fff8e5;border-radius:9px;padding:10px 13px;font-size:.875rem;color:#655121;margin:0 0 17px}.copy-actions{display:flex;flex-wrap:wrap;gap:9px}.button{font-weight:700;font-size:.875rem;min-height:44px;padding:10px 15px;border:1px solid #bed4e0;border-radius:9px;background:white;color:var(--ink)}.button:hover{background:var(--sky)}.button.primary{background:var(--blue);border-color:var(--blue);color:#fff}.button.primary:hover{background:#055577}.shot-card details{margin-top:17px;padding-top:13px;border-top:1px solid var(--line)}summary{font-size:.9rem;color:var(--blue);min-height:36px;padding:3px 0}.prompt{font-size:.9rem;color:var(--ink);background:#f3f7fa;padding:15px;border-radius:9px;white-space:pre-wrap;overflow-wrap:anywhere;margin:12px 0}.hint{font-size:.8rem;color:var(--muted);margin:12px 0 0}.pair-insight{margin:15px 0 0;padding:14px 17px;border-radius:10px;background:#eaf5fb;font-size:.9rem}.pair-insight strong{color:#075b7e}.learning-note{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:22px 0;margin-bottom:40px;display:flex;gap:25px;align-items:baseline}.learning-note strong{white-space:nowrap;color:var(--blue)}.learning-note p{margin:0;color:var(--muted);font-size:.9rem}.contents-section{margin-bottom:40px}#catalogue{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}#catalogue details{background:white;border:1px solid var(--line);border-radius:12px;padding:12px 17px}#catalogue summary{color:var(--ink);font-weight:700}#catalogue ul{list-style:none;margin:10px 0 3px;padding:0;display:flex;flex-wrap:wrap;gap:5px 12px}#catalogue li{font-size:.875rem;color:var(--muted)}#catalogue li.basic{color:var(--blue)}.method-section{background:white;border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin:35px 0}.method-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin-top:23px}.step{color:var(--blue);font-size:.8rem;font-weight:800}.method-grid h3{font-size:1.05rem;margin:4px 0}.method-grid p{color:var(--muted);font-size:.9rem;margin:0}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;padding:25px 0 35px;font-size:.8rem;color:var(--muted)}footer p{margin:0}footer a{overflow-wrap:anywhere}.copy-notice{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);max-width:calc(100% - 32px);background:#183448;color:white;padding:10px 20px;border-radius:10px;font-size:.9rem;z-index:20;pointer-events:none}.copy-notice:empty{display:none}dialog{width:min(560px,calc(100% - 32px));border:1px solid var(--line);border-radius:16px;padding:26px;background:white;color:var(--ink)}dialog::backdrop{background:#18344880}dialog textarea{display:block;width:100%;min-height:130px;margin:15px 0;padding:12px;border:1px solid var(--line);border-radius:8px;font-size:1rem}
@media(max-width:720px){main{padding:0 18px}.header-inner{padding:15px 18px}.intro{padding:28px 0 22px;display:block}.intro-note{display:none}.scene-nav{gap:8px;margin-bottom:28px}.scene-nav a{padding:9px 12px;font-size:.85rem}.cards{grid-template-columns:1fr;gap:15px}.card-body{padding:19px}.definition{min-height:0}.section-count{display:none}.scene-section{margin-bottom:36px}.learning-note{display:block}.learning-note p{margin-top:9px}#catalogue{grid-template-columns:1fr}.method-section{padding:20px}.method-grid{grid-template-columns:1fr;gap:20px}footer{flex-direction:column;gap:13px}.brand{font-size:.82rem}.edition{font-size:.75rem}.shot-card h3{font-size:1.35rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}