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.online-header .wordmark{font-size:1.8rem}
.online-header-actions{display:flex;align-items:center;flex-wrap:wrap;gap:.7rem 1.2rem;font-size:.875rem}
.online-header-actions>a{min-height:44px;display:inline-flex;align-items:center}
.online-home-link{text-decoration:underline;text-underline-offset:5px}
.online-book{width:min(860px,calc(100% - 48px));margin:3.5rem auto 0}
.online-title-block{display:grid;grid-template-columns:minmax(0,1fr) 150px;gap:2.5rem;align-items:center}
.online-title-block h1{font-family:var(--serif);font-size:clamp(2.6rem,6vw,4.8rem);font-weight:500;letter-spacing:-.025em;line-height:1.05;margin-top:.7rem}
.online-subtitle{font-family:Georgia,"Times New Roman",serif;font-size:1.3rem;font-style:italic;line-height:1.5;margin-top:1rem}
.online-edition{font-size:.875rem;color:var(--muted);margin-top:1rem}
.online-cover{width:150px;box-shadow:7px 9px 15px rgba(13,39,29,.15)}
.online-contents{margin:3rem 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:1rem 0 1.5rem}
.online-contents summary{font-family:Georgia,"Times New Roman",serif;font-size:1.25rem;min-height:44px;cursor:pointer;padding:.3rem 0}
.online-contents a{display:inline-block;min-height:36px;padding:.2rem 0;text-decoration:underline;text-decoration-color:var(--line);text-underline-offset:4px}
.online-contents a:hover{text-decoration-color:var(--red);color:var(--red)}
.online-preface-link{margin-top:.7rem}
.online-contents ol{columns:2;column-gap:2.4rem;padding-left:1.4rem;margin:.6rem 0 0}
.online-contents li{break-inside:avoid;padding-left:.3rem;font-size:.9375rem;line-height:1.6}
.book-text{font-family:Georgia,"Times New Roman",serif;font-size:1.25rem;line-height:1.85;max-width:64ch;margin:auto;overflow-wrap:break-word}
.online-chapter{padding:1rem 0 2rem;scroll-margin-top:2rem}
.online-chapter+.online-chapter{border-top:1px solid var(--line);padding-top:3rem}
.online-chapter h2{font-family:var(--serif);font-size:clamp(1.9rem,4vw,2.6rem);font-weight:500;line-height:1.2;letter-spacing:-.015em;margin-bottom:1.5rem}
.online-chapter p{margin-bottom:1.1rem}
.online-chapter .online-chapter-links{font-family:var(--sans);font-size:.8125rem;display:flex;justify-content:flex-end;gap:1rem;flex-wrap:wrap;margin-top:1.5rem}
.online-chapter-links a{display:inline-flex;align-items:center;min-height:44px;text-decoration:underline;text-underline-offset:4px;color:var(--muted)}
.online-end{text-align:center;font-style:italic;margin:1rem 0 3rem}
.online-footer{width:min(1060px,calc(100% - 48px));margin:auto;border-top:1px solid var(--line);padding:2rem 0;display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.875rem;color:var(--muted)}
.online-footer a{text-decoration:underline;text-underline-offset:4px;min-height:44px;display:inline-flex;align-items:center}
@media(max-width:640px){.online-header,.online-book,.online-footer{width:calc(100% - 36px)}.online-header{align-items:flex-start;flex-wrap:wrap;gap:.6rem;padding:1.2rem 0}.online-header-actions{gap:.5rem 1rem}.online-header-actions .button{padding:.5rem .9rem;min-height:44px}.online-book{margin-top:2rem}.online-title-block{grid-template-columns:minmax(0,1fr);gap:1.5rem}.online-cover{width:110px}.online-title-block h1{font-size:clamp(2.4rem,10vw,3.5rem)}.online-subtitle{font-size:1.1rem}.online-contents{margin:2rem 0}.online-contents ol{columns:1}.book-text{font-size:1.125rem;line-height:1.8}.online-chapter+.online-chapter{padding-top:2rem}.online-footer{padding:1.5rem 0}}
@media print{.online-header,.online-contents,.online-chapter-links,.online-footer,.online-cover{display:none!important}.online-book{width:100%;margin:0}.online-title-block{display:block;margin-bottom:2rem}.book-text{font-size:11pt;line-height:1.5;max-width:none}.online-chapter{padding:0}.online-chapter+.online-chapter{break-before:page;border:0;padding:0}.online-chapter h2{font-size:20pt}.online-chapter p{orphans:3;widows:3}body{background:#fff;color:#000}}