.breadcrumb_breadcrumb{font-size:.75rem;font-weight:300;flex-shrink:0}.breadcrumb_breadcrumb ol{display:flex;align-items:center;gap:.5rem;list-style:none;margin:0;padding:0}.breadcrumb_item{display:flex;align-items:center;gap:.5rem;white-space:nowrap}.breadcrumb_separator{color:#9ca3af}.breadcrumb_current{font-weight:500}.breadcrumb_link{text-decoration:none;color:inherit}.breadcrumb_link:hover{text-decoration:underline;text-underline-offset:2px}.hex-mark_mark{display:block;height:1em;width:auto;aspect-ratio:110/111;color:inherit;overflow:visible}.brand-lockup_lockup{display:flex;color:#000;font-size:1rem}.brand-lockup_text{display:flex;flex-direction:column}.brand-lockup_wordmark{font-family:var(--font-wordmark),var(--font-mulish),sans-serif;font-weight:500;text-transform:lowercase;letter-spacing:.06em;line-height:1;font-size:2em;text-align:center}.brand-lockup_tagline{text-transform:uppercase;letter-spacing:.28em;font-size:.6em;font-weight:500;text-align:center;padding-left:.28em;margin-top:.5em;color:#4b5563}.brand-lockup_horizontal{flex-direction:row;align-items:center;gap:.6em}.brand-lockup_horizontal .brand-lockup_mark{height:3.2em}.brand-lockup_stacked{flex-direction:column;align-items:center;gap:.6em;text-align:center}.brand-lockup_stacked .brand-lockup_text{align-items:center}.brand-lockup_stacked .brand-lockup_mark{height:5.5em}.brand-lockup_stacked .brand-lockup_tagline{letter-spacing:.3em}.site-header_header{position:-webkit-sticky;position:sticky;top:0;width:100%;background:#fff;box-shadow:0 0 18px rgba(0,0,0,.1);z-index:100}.site-header_topRow{position:relative;box-sizing:border-box;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 1rem}@media(min-width:40rem){.site-header_topRow{padding:.9rem 1.5rem}}.site-header_brand{display:inline-flex;text-decoration:none;color:inherit}.site-header_lockup{font-size:.7rem}@media(min-width:40rem){.site-header_lockup{font-size:.85rem}}.site-header_breadcrumbRow{display:flex;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;padding:.4rem 1rem;font-size:.875rem;border-top:1px solid #f3f4f6}.site-header_breadcrumbRow::-webkit-scrollbar{display:none}@media(min-width:40rem){.site-header_breadcrumbRow{justify-content:center}}.site-footer_footer{box-shadow:0 0 18px rgba(0,0,0,.1);margin-top:4rem}.site-footer_inner{max-width:64rem;margin:0 auto;padding:2rem 1.5rem;display:flex;flex-direction:column;align-items:center;font-size:.875rem;font-weight:300}.site-footer_menu{margin-bottom:1.25rem;color:#6b7280}.site-footer_menu ul{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem 1.5rem;list-style:none;margin:0;padding:0}.site-footer_link{text-decoration:none;color:inherit;white-space:nowrap}.site-footer_link:hover{text-decoration:underline;text-underline-offset:2px}.site-footer_copyright{margin:0}.site-footer_version{font-size:.75rem;margin:0}.stub-page_stub{display:flex;flex-direction:column;align-items:center;gap:1.25rem;text-align:center;max-width:48rem;margin:0 auto;padding:4rem 1.5rem}.stub-page_title{font-size:1.75rem;font-weight:500;margin:0}.stub-page_message{font-size:1.125rem;color:#4b5563;margin:0}.stub-page_action{color:#06c;text-decoration:none;font-weight:400}.stub-page_action:hover{text-decoration:underline}.narrative-block_paragraph{margin:.75rem 0}.narrative-block_drop-cap:first-letter{float:left;font-size:8.4em;font-style:normal;font-weight:100;line-height:.78;margin:.05em .1em 0 0;text-transform:uppercase}.formula-block_formula{margin:1.5rem 0}.formula-block_lead-in{margin-bottom:.5rem}.formula-block_display{overflow-x:auto;padding:.5rem 0}.formula-block_lead-out{margin-top:.5rem}.figure-block_figure{margin:.75rem 0 2rem}.figure-block_lead-in{margin-bottom:.75rem}.figure-block_image-wrapper{margin-top:2rem;display:flex;justify-content:center}.figure-block_img{max-width:350px;width:90%;height:auto;border-style:none}.figure-block_img.figure-block_small{max-width:150px}.figure-block_img.figure-block_medium{max-width:250px}@media(min-width:40rem){.figure-block_img{width:80%;max-width:400px}.figure-block_img.figure-block_small{max-width:150px}.figure-block_img.figure-block_medium{max-width:300px}}.figure-block_caption{text-align:center;font-size:.875rem;font-weight:300;margin-top:.5rem;color:#6b7280}.figure-block_caption strong{font-weight:500}.list-block_list{margin:1rem 0}.list-block_lead-in{margin-bottom:.5rem}.list-block_ordered{list-style:decimal outside}.list-block_ordered,.list-block_unordered{padding-left:1.5rem;display:flex;flex-direction:column;gap:.25rem}.list-block_unordered{list-style:disc outside}.recall-block_recall{display:inline-flex;align-items:center;gap:.5rem;border:1px solid #d1d5db;padding:.25rem .75rem;font-size:.875rem;font-weight:300;color:#4b5563;margin:.5rem 0}.recall-block_type-label{font-weight:400}.quote-block_quote{margin:.75rem 0}.quote-block_lead-in{margin-top:.75rem}.quote-block_quote-body{width:-moz-fit-content;width:fit-content;margin:0 auto}.quote-block_blockquote{position:relative;padding-left:1.75rem;font-style:italic;margin:1.5rem 0 0}.quote-block_blockquote:before{content:"“";position:absolute;left:0;top:0;font-size:3rem;line-height:1;color:#d1d5db;font-style:normal}.quote-block_author{padding-left:1.75rem;font-size:.875rem;color:#6b7280;margin:0 0 1.5rem}.subsection-block_subsection{margin-top:2rem}.subsection-block_heading{font-size:1.15rem;font-weight:600;margin-bottom:1rem}.details-block_details{margin:1.5rem 0;border-left:3px solid #d1d5db;padding-left:1rem}.details-block_summary{cursor:pointer;color:#4b5563;font-weight:500;font-size:.9em;list-style:none;display:flex;align-items:center;gap:.4rem}.details-block_summary:before{content:"▶";font-size:.65em;transition:transform .12s ease}details[open]>.details-block_summary:before{transform:rotate(90deg)}.details-block_content{margin-top:.75rem;font-size:.85em}.embedded-entity_definition,.embedded-entity_proof,.embedded-entity_remark,.embedded-entity_theorem{margin:2rem 0 1.5rem}.embedded-entity_definition h4+div[data-block-type=formula],.embedded-entity_definition h4+div[data-block-type=formula]>p:first-child,.embedded-entity_definition h4+p,.embedded-entity_proof h4+div[data-block-type=formula],.embedded-entity_proof h4+div[data-block-type=formula]>p:first-child,.embedded-entity_proof h4+p,.embedded-entity_remark h4+div[data-block-type=formula],.embedded-entity_remark h4+div[data-block-type=formula]>p:first-child,.embedded-entity_remark h4+p,.embedded-entity_theorem h4+div[data-block-type=formula],.embedded-entity_theorem h4+div[data-block-type=formula]>p:first-child,.embedded-entity_theorem h4+p{margin-top:0}.embedded-entity_entity-label{font-size:1.15rem;font-weight:600;margin-bottom:0}.embedded-entity_qed{text-align:right;font-size:.875rem;margin-top:-1rem;font-size:1.6rem}.claim-block_claim{display:flex;gap:.5rem;align-items:flex-start}.claim-block_index{flex-shrink:0}.claim-block_content{flex:1 1;min-width:0}.claim-block_formula{overflow-x:auto;padding:.5rem 0}.content-blocks_unknown-block{margin:.5rem 0;font-size:.75rem;color:#f87171}.content-blocks_typewriter-lead-in{margin-top:.75rem;margin-bottom:.5rem;line-height:1.625}.content-blocks_typewriter-block{text-align:center;font-family:ui-monospace,monospace;font-size:.875rem;margin:.75rem 0;padding:.5rem 0 .75rem;overflow-x:auto}.book-reference_book-ref{display:flex;padding:3rem 0 2rem;gap:1.5rem;text-decoration:none;justify-content:center;color:inherit}@media(min-width:40rem){.book-reference_book-ref{padding:3rem 0 0}}.book-reference_book-ref__logo{position:relative;display:flex;align-items:center;justify-content:center;width:5rem;height:5rem;flex-shrink:0}@media(min-width:40rem){.book-reference_book-ref__logo{width:7rem;height:7rem}}.book-reference_book-ref__mark{height:100%;width:auto}.book-reference_book-ref__info{display:flex;flex-direction:column;justify-content:center}.book-reference_book-ref__episode{font-size:1rem;font-weight:400;letter-spacing:.4rem;text-transform:uppercase;color:#9ca3af;margin:0}@media(min-width:40rem){.book-reference_book-ref__episode{letter-spacing:.5rem;font-size:1.25rem}}.book-reference_book-ref__title{font-size:1.25rem;font-weight:400;text-transform:lowercase;letter-spacing:.4rem;margin:0}@media(min-width:40rem){.book-reference_book-ref__title{letter-spacing:.5rem;font-size:1.5rem}}.book-index_index{box-sizing:border-box;width:100%;max-width:48rem;margin:0 auto;padding:2.5rem 1.5rem 4rem}@media(min-width:86.25rem){.book-index_index{max-width:52rem}}.book-index_teaser{border:1px solid #000;box-shadow:0 0 15px 0 #888;max-width:42rem;margin:4.5rem auto;padding:1.75rem 2rem}.book-index_teaser ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:1.1rem}.book-index_teaser li{display:flex;align-items:baseline;gap:.9rem;font-size:1.1rem;line-height:1.4;font-weight:500;text-transform:uppercase}.book-index_teaserIcon{flex:0 0 auto;font-size:1.4em;color:#9ca3af}.book-index_section{margin-top:3rem}.book-index_sectionTitle{font-size:1.3rem;font-weight:600;margin:0 0 1rem}@media(min-width:40rem){.book-index_sectionTitle{font-size:1.5rem}}.book-index_prose{font-weight:300;line-height:1.8}.book-index_part{margin-bottom:3.5rem}.book-index_part:last-child{margin-bottom:0}.book-index_partTitle{font-size:1.3rem;font-weight:500;letter-spacing:.01em;margin:0 0 1rem;color:#1f2937}.book-index_partNumber{color:#9ca3af}.book-index_rows{display:flex;flex-direction:column;gap:2rem}.book-index_bibliography{padding-left:1.4rem;display:flex;flex-direction:column;gap:.5rem;font-size:.9rem;font-weight:300;color:#1f2937}.section-view_section{margin-top:2.5rem}.section-view_heading{font-size:1.3rem;font-weight:600;margin-bottom:1rem}@media(min-width:40rem){.section-view_heading{font-size:1.5rem}}.section-view_section-label{font-weight:600;color:#6b7280;margin-right:.5rem}.chapter-page_chapter{width:92%;margin:0 auto}@media(min-width:40rem){.chapter-page_chapter{width:75%}}@media(min-width:64rem){.chapter-page_chapter{width:60%}}.chapter-page_chapter-header{margin:1.5rem 0;font-weight:600}@media(min-width:40rem){.chapter-page_chapter-header{padding:1rem 0 2.5rem;text-align:center}}.chapter-page_chapter-label{letter-spacing:.1em;text-transform:uppercase;color:#9ca3af;margin:0;font-size:1rem}@media(min-width:40rem){.chapter-page_chapter-label{font-size:1.5rem}}.chapter-page_chapter-title{font-size:1.5rem;margin:0}@media(min-width:40rem){.chapter-page_chapter-title{font-size:2.5rem}}.chapter-page_abstract,.chapter-page_prereq{margin-bottom:2rem;font-weight:500;font-style:italic}.chapter-page_prereq{color:red}.chapter-page_prologue{margin-bottom:2rem}.chapter-page_epilogue{margin-top:2rem;font-weight:500;font-style:italic}.chapter-page_chapter-nav{display:flex;justify-content:space-between;gap:1rem;margin:3rem 0}.chapter-page_chapter-nav-btn{display:inline-flex;align-items:center;gap:.5rem;background-color:#06c;color:#fff;text-decoration:none;padding:.75rem 1.25rem;font-size:1rem;font-weight:500;line-height:1.4;max-width:45%}.chapter-page_chapter-nav-btn:hover{background-color:#1f2937}.chapter-page_chapter-nav-btn--next{margin-left:auto;text-align:right}.standalone-route_thumbnail{position:relative;width:100%;height:200px}@media(min-width:40rem){.standalone-route_thumbnail{height:350px}}@media(min-width:64rem){.standalone-route_thumbnail{height:500px}}.standalone-index_main{box-sizing:border-box;width:100%;max-width:48rem;margin:0 auto;padding:2.5rem 1.5rem 4rem}@media(min-width:86.25rem){.standalone-index_main{max-width:52rem}}.standalone-index_rows{display:flex;flex-direction:column;gap:2rem}.standalone-index_empty{color:#6b7280;font-weight:300}.page_thumbnail{position:relative;width:100%;height:200px}@media(min-width:40rem){.page_thumbnail{height:350px}}@media(min-width:64rem){.page_thumbnail{height:500px}}.site-nav_nav{gap:1.25rem}.site-nav_links,.site-nav_nav{display:flex;align-items:center}.site-nav_links{gap:1.5rem;list-style:none;margin:0;padding:0}.site-nav_link{text-decoration:none;color:#000;font-size:.95rem;letter-spacing:.01em}.site-nav_link:hover{text-decoration:underline;text-underline-offset:4px}.site-nav_iconBtn{display:flex;align-items:center;background:none;border:none;padding:0;cursor:pointer;color:#000}.site-nav_hamburger{display:none}@media(max-width:40rem){.site-nav_hamburger{display:flex}.site-nav_links{display:none;position:absolute;top:100%;right:0;left:0;flex-direction:column;align-items:flex-start;gap:0;background:#fff;border-top:1px solid #e5e7eb;box-shadow:0 12px 18px rgba(0,0,0,.08);padding:.5rem 1rem}.site-nav_links.site-nav_open{display:flex}.site-nav_links li{width:100%}.site-nav_links .site-nav_link{display:block;padding:.75rem 0;width:100%}}