:root{--bg-dark: #1e1e1e;--text-primary: #ffffff;--text-secondary: #cccccc;--accent-blue: #58c4dd;--accent-yellow: #ffff00;--accent-green: #83c167;--accent-red: #ff6666}*{margin:0;padding:0;box-sizing:border-box}body{background-color:var(--bg-dark);color:var(--text-primary);font-family:Noto Sans JP,sans-serif;line-height:1.8;max-width:800px;margin:0 auto;padding:2rem}.chapter-page{margin-bottom:4rem}.chapter-page header{margin-bottom:3rem;border-bottom:2px solid var(--accent-blue);padding-bottom:1rem}.chapter-page h1{color:var(--accent-blue);font-size:2rem;margin-bottom:.5rem}.chapter-page h2{color:var(--accent-yellow);font-size:1.5rem;margin-top:3rem;margin-bottom:1rem}.chapter-page h3{color:var(--accent-green);font-size:1.2rem;margin-top:2rem;margin-bottom:.8rem}.chapter-page p{margin-bottom:1rem;color:var(--text-primary)}.chapter-page strong{color:var(--accent-yellow);font-weight:700}.chapter-page ul,.chapter-page ol{margin-left:2rem;margin-bottom:1rem}.chapter-page li{margin-bottom:.5rem}.content-section{margin-bottom:3rem}.gif-animation{margin:2rem 0;text-align:center}.gif-animation img{max-width:100%;border-radius:8px;box-shadow:0 4px 6px #0000004d}.gif-animation figcaption{margin-top:.5rem;font-size:.9rem;color:var(--text-secondary);font-style:italic}.math-block{margin:1.5rem 0;text-align:center;font-size:1.2rem;overflow-x:auto}.math-block.inline{display:inline;margin:0;font-size:inherit}.summary-box{background-color:#58c4dd1a;border-left:4px solid var(--accent-blue);padding:1.5rem;margin:2rem 0;border-radius:4px}.summary-box h3{margin-top:0;color:var(--accent-blue)}.summary-box ul{margin-top:1rem;margin-bottom:0}.highlight-box{background-color:#ffff001a;border-left:4px solid var(--accent-yellow);padding:1rem;margin:1.5rem 0;border-radius:4px}.comparison-box{display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;margin:2rem 0}.comparison-item{background-color:#ffffff0d;border-radius:8px;padding:1.5rem;border:1px solid rgba(255,255,255,.1)}.comparison-item h3{margin-top:0;font-size:1.1rem;color:var(--accent-blue)}.comparison-item ul{margin-left:1.5rem;margin-bottom:0}@media(max-width:768px){.comparison-box{grid-template-columns:1fr;gap:1rem}}.chapter-intro,.chapter-context{font-size:1.05rem;color:var(--text-secondary);margin-bottom:.8rem;line-height:1.6}.chapter-footer{margin-top:4rem;padding-top:2rem;border-top:1px solid var(--text-secondary);opacity:.8}blockquote{background-color:#58c4dd1a;border-left:4px solid var(--accent-blue);padding:1rem 1.5rem;margin:2rem 0;font-style:italic;color:var(--text-secondary)}blockquote p{margin:0}.three-views{display:grid;gap:1.5rem;margin:2rem 0}.view-card{background-color:#ffffff0d;border-radius:8px;padding:1.5rem;border:1px solid rgba(255,255,255,.1)}.view-card h3{margin-top:0;font-size:1.1rem;color:var(--accent-blue)}.view-card p{margin-bottom:0;font-size:.95rem}@media(max-width:768px){body{padding:1rem}.chapter-page h1{font-size:1.5rem}.chapter-page h2{font-size:1.3rem}.math-block{font-size:1rem}.three-views{gap:1rem}.view-card{padding:1rem}}