.technology-entry{grid-column:1/-1;background:#edf3e7;border-radius:12px;padding:25px!important;margin-bottom:8px;border:0!important}.technology-entry .index-number{font-size:10px;letter-spacing:.1em;color:#668a3f}.component-technology-link{display:inline-block;margin-top:20px;font-size:12px;font-weight:650;color:var(--green);text-decoration:underline;text-underline-offset:4px}
.technology-page{max-width:1490px}.technology-heading{display:grid;grid-template-columns:1fr 260px;gap:8%;align-items:center;padding:62px 0 42px}.technology-heading h1{font-size:clamp(40px,4.6vw,66px);line-height:1.08;margin:22px 0}.technology-intro{font-size:17px;max-width:660px;color:var(--muted);line-height:1.7}.technology-meta{border-left:1px solid var(--line);padding-left:34px}.atlas-mark{font-family:var(--display);font-size:65px;line-height:1;color:#83a25e}.technology-meta>p{font-size:20px;line-height:1.5;margin:13px 0 18px}.technology-meta>span:last-child{font-size:11px;display:block;color:var(--muted);margin-top:14px;line-height:1.6}#technology-counts{display:flex;gap:20px}#technology-counts b{display:block;font-size:22px;font-family:var(--display)}#technology-counts span{font-size:11px;color:var(--muted)}.technology-navigation{display:flex;border-bottom:1px solid #cddbd1;gap:30px;overflow:auto;margin-bottom:34px;scrollbar-width:thin}.technology-navigation>a{font-size:14px;font-weight:600;white-space:nowrap;padding:15px 0 19px;color:var(--muted);border-bottom:3px solid transparent}.technology-navigation>a[aria-current=page]{color:var(--green);border-color:var(--green)}.technology-navigation>a>span{margin-left:24px;color:#7f9c66}.technology-workspace{min-height:650px;scroll-margin-top:24px}.technology-footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:25px;margin:48px 0 0;padding:24px 0 30px;font-size:11px;color:var(--muted)}.technology-footer a{font-weight:600;white-space:nowrap}
.atlas-layout{display:grid;grid-template-columns:254px minmax(0,1fr);gap:36px;align-items:start}.atlas-sidebar{position:sticky;top:20px;min-width:0}.atlas-search{display:block;position:relative}.atlas-search span{display:block;font-size:11px;font-weight:600;margin-bottom:7px}.atlas-search input,.source-controls input{width:100%;font:inherit;border:1px solid #d4dfd6;background:#fff;border-radius:8px;padding:12px 14px;font-size:13px;color:var(--ink);outline-offset:3px}.atlas-search input::placeholder,.source-controls input::placeholder{color:#81928d}.atlas-filter-label{display:flex;align-items:center;justify-content:space-between;margin:16px 0 8px;font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}.atlas-filter{width:100%;font:inherit;font-size:12px;color:var(--ink);border:1px solid var(--line);border-radius:8px;background:#eef3ed;padding:10px 8px;cursor:pointer}.atlas-topic-list{margin-top:18px;max-height:calc(100vh - 245px);overflow:auto;padding-right:5px;scrollbar-width:thin;scrollbar-color:#bdcec3 transparent}.atlas-group-title{font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:#7b8e83;font-weight:650;padding:16px 10px 7px}.atlas-topic{display:flex;align-items:start;gap:9px;border-radius:8px;margin:3px 0;padding:12px 10px;position:relative}.atlas-topic:hover{background:#edf3eb}.atlas-topic[aria-current=page]{background:var(--green);color:white}.atlas-topic .topic-number{font-size:10px;opacity:.6;line-height:1.8;flex-shrink:0;min-width:17px}.atlas-topic b{display:block;font-size:12px;line-height:1.5;font-weight:550}.atlas-topic small{display:block;font-size:10px;opacity:.7;margin-top:4px}.atlas-topic[aria-current=page] .topic-number{color:var(--lime);opacity:1}.search-empty{padding:20px 8px;font-size:13px;color:var(--muted);line-height:1.7}.search-empty button{display:block;background:none;padding:0;margin-top:10px;text-decoration:underline}.mobile-topics-toggle{display:none}
.technology-reader{border:1px solid var(--line);border-radius:15px;background:white;min-width:0;box-shadow:0 8px 36px #1a514a05;overflow:hidden}.reader-header{padding:32px 36px 26px;background:linear-gradient(110deg,#f0f5ea,#fbfcf8)}.reader-kicker{display:flex;justify-content:space-between;gap:15px;font-size:10px;text-transform:uppercase;letter-spacing:.11em;color:#70816c;font-weight:600}.reader-kicker a{text-decoration:underline;text-underline-offset:3px}.reader-header h2{font-size:clamp(27px,2.7vw,37px);line-height:1.2;margin:17px 0 14px;max-width:760px}.reader-header>p{font-size:15px;color:#596f66;line-height:1.75;max-width:760px}.reader-tabs{display:flex;gap:20px;border-bottom:1px solid var(--line);padding:0 36px;overflow:auto;scrollbar-width:thin}.reader-tabs a{padding:17px 0 14px;font-size:12px;white-space:nowrap;color:var(--muted);border-bottom:2px solid transparent;font-weight:550}.reader-tabs a[aria-current=page]{color:var(--green);border-color:var(--green)}.reader-tabs small{display:inline-grid;place-items:center;background:#edf2ea;border-radius:4px;margin-left:5px;padding:0 4px;font-size:9px}.reader-body{padding:30px 36px 36px;min-height:400px}.reader-section+.reader-section{margin-top:28px}.reader-section>h3,.resource-section>h3{font-size:19px;margin-bottom:12px;letter-spacing:-.035em}.reader-section>p,.reader-section .body-copy{font-size:14px;color:#4f655e;line-height:1.85}.reader-label{display:block;font-size:10px;letter-spacing:.1em;text-transform:uppercase;font-weight:650;color:#7f926d;margin-bottom:11px}.control-lens{margin:25px 0;padding:22px 24px;border-left:3px solid #9ab96b;background:#f2f6ed;border-radius:0 8px 8px 0}.control-lens .reader-label{color:#698443}.control-lens p{font-size:14px;line-height:1.8;color:#456052}.inspection-connection{display:grid;grid-template-columns:33px 1fr;gap:15px;margin-top:25px;padding:23px 0 4px;border-top:1px solid var(--line)}.inspection-connection .connection-icon{height:31px;width:31px;border-radius:9px;background:var(--ink);color:var(--lime);display:grid;place-items:center;font-size:19px}.inspection-connection p{font-size:13px;line-height:1.8;color:var(--muted)}.inspection-connection h3{font-size:16px;letter-spacing:-.025em;margin:0 0 8px}.inspection-connection a{font-size:12px;font-weight:600;display:inline-block;margin-top:13px;text-decoration:underline;text-underline-offset:4px}.related-topics{border-top:1px solid var(--line);margin-top:25px;padding-top:20px}.related-topics>p{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:10px}.related-topics>div{display:flex;flex-wrap:wrap;gap:8px}.related-topics a{font-size:11px;background:#f1f5ef;border:1px solid #e0e8db;border-radius:7px;padding:8px 11px}.related-topics a:hover{background:#e5efdb}.mechanism-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}.mechanism-list li{display:grid;grid-template-columns:31px 1fr;gap:14px;padding:17px 0;border-bottom:1px solid #edf1ea}.mechanism-list li>span{background:#eaf2df;border-radius:50%;width:27px;height:27px;font-size:11px;display:grid;place-items:center;color:#486635}.mechanism-list h4{margin:1px 0 7px;font-size:14px;font-weight:600}.mechanism-list p{font-size:13px;line-height:1.75;color:var(--muted)}.tradeoffs{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:27px}.tradeoffs h3{font-size:15px;letter-spacing:-.02em;margin-bottom:13px}.tradeoffs ul{padding-left:17px;margin:0}.tradeoffs li{font-size:12px;line-height:1.8;margin-bottom:10px;color:var(--muted)}.tradeoffs>div{padding:20px;background:#f5f7f1;border-radius:8px}.tradeoffs>div+div{background:#fbf7ef}.source-citation{font-size:11px;color:#608342;border-bottom:1px dotted #90a779;margin-left:2px;white-space:nowrap}.source-citation:hover{color:var(--green);background:#edf5de}.reader-provenance{font-size:10px;color:#85958b;border-top:1px solid #e7ede3;padding-top:20px;margin-top:25px;line-height:1.75}.reader-provenance a{text-decoration:underline}
.resource-section+.resource-section{margin-top:32px}.resource-intro{font-size:13px;color:var(--muted);margin-bottom:18px;line-height:1.7}.video-cards{display:grid;gap:13px}.learning-video{border:1px solid var(--line);border-radius:9px;padding:20px;display:grid;grid-template-columns:44px 1fr;gap:16px;background:#fafcf7}.learning-video .video-play{width:40px;height:40px;border:1px solid #bdd0b6;color:var(--green);border-radius:50%;font-size:12px;background:#f0f6e6;display:grid;place-items:center}.learning-video .video-kind{font-size:9px;letter-spacing:.09em;text-transform:uppercase;color:#819170;display:block;margin-bottom:6px}.learning-video h4{font-size:14px;margin:0 0 8px;line-height:1.5}.learning-video p{font-size:12px;line-height:1.75;color:var(--muted)}.learning-video .video-actions{display:flex;gap:18px;flex-wrap:wrap;margin-top:13px;font-size:11px;font-weight:600}.learning-video .video-actions button{padding:0;background:none;text-decoration:underline;text-underline-offset:3px}.learning-video .video-actions a{color:#748568}.source-card-list{display:grid;gap:9px}.paper-card{display:grid;grid-template-columns:30px 1fr 15px;gap:10px;border:1px solid #e3e9de;border-radius:8px;padding:16px 15px;align-items:start}.paper-card:hover{background:#f5f8f1}.paper-card .paper-number{font-size:10px;color:#8b9e7b;padding-top:2px}.paper-card b{font-size:12px;display:block;line-height:1.6;font-weight:550}.paper-card small{display:block;color:#7a8b7e;font-size:10px;margin-top:6px;line-height:1.6}.paper-card .paper-arrow{color:#7d9962;font-size:14px}.video-watch-points{padding-left:18px;margin:12px 0 18px;color:var(--muted);font-size:12px;line-height:1.8}.technology-video-container{background:#102e29;aspect-ratio:16/9;border-radius:9px;overflow:hidden}.technology-video-container iframe{border:0;width:100%;height:100%}.technology-video-dialog{max-height:94vh;overflow:auto}.technology-video-dialog .dialog-top h2{font-size:23px;max-width:730px;line-height:1.35}.technology-video-dialog .video-description>p{margin-bottom:10px}.technology-video-dialog .video-description>a{display:inline-block;margin-right:24px;font-size:12px}.video-provider-note{font-size:10px!important;opacity:.8;margin-top:14px}
.report-chapter{margin-bottom:35px}.report-chapter+.report-chapter{border-top:2px solid #e6eedf;padding-top:30px}.report-chapter-header{display:flex;align-items:baseline;gap:12px;margin-bottom:19px}.report-chapter-header>span{font-size:9px;text-transform:uppercase;letter-spacing:.08em;white-space:nowrap;color:#87a167}.report-chapter-header h3{font-size:22px;line-height:1.3}.report-rich>p{font-size:13px;line-height:1.9;color:#4d655b;margin:0 0 17px}.report-rich>h4{font-family:var(--display);font-size:16px;letter-spacing:-.02em;margin:25px 0 12px}.report-table-wrap{overflow:auto;margin:20px 0 22px;border:1px solid var(--line);border-radius:8px}.report-table{width:100%;border-collapse:collapse;text-align:left;font-size:11px;line-height:1.7;min-width:480px}.report-table th{background:#edf3e8;color:var(--ink);padding:13px 15px;font-weight:650;vertical-align:top}.report-table td{padding:14px 15px;border-top:1px solid #e2e9de;vertical-align:top;color:#516a60}.report-table tbody tr:nth-child(even){background:#fbfcf9}.report-figure{margin:24px 0}.report-figure img{display:block;width:100%;height:auto;border:1px solid #edf1e7;border-radius:7px}.report-figure figcaption{font-size:10px;line-height:1.8;color:var(--muted);margin-top:10px}.report-note{background:#f5f7f0;border:1px solid #e4ebda;border-radius:8px;padding:14px 17px;margin-bottom:25px;font-size:12px;line-height:1.75;color:#6c7b5f}.chapter-navigation{display:flex;justify-content:space-between;gap:18px;margin-top:28px;border-top:1px solid var(--line);padding-top:20px}.chapter-navigation a{font-size:12px;font-weight:550;max-width:46%}.chapter-navigation a:last-child{text-align:right}.chapter-sidebar .atlas-topic b{font-size:11px}.chapter-sidebar .atlas-topic{padding:11px 10px}.chapter-sidebar .atlas-topic-list{max-height:calc(100vh - 180px)}
.timeline-intro{display:flex;justify-content:space-between;gap:30px;align-items:end;margin:0 0 25px}.timeline-intro h2,.source-heading h2{font-size:30px;line-height:1.2}.timeline-intro p{max-width:530px;font-size:13px;color:var(--muted);line-height:1.8}.timeline-years{display:flex;gap:9px;flex-wrap:wrap;margin:0 0 27px}.timeline-years button,.source-kind-filters button{border:1px solid var(--line);background:#fff;border-radius:30px;font-size:12px;padding:10px 18px;color:var(--muted)}.timeline-years button[aria-pressed=true],.source-kind-filters button[aria-pressed=true]{background:var(--green);border-color:var(--green);color:white}.timeline-layout{display:grid;grid-template-columns:1fr 1.05fr;gap:45px;align-items:start}.timeline-events{position:relative;max-height:625px;overflow:auto;padding-right:13px;scrollbar-width:thin}.timeline-event{display:grid;grid-template-columns:65px 1fr;gap:16px;position:relative;width:100%;text-align:left;padding:20px 16px;background:transparent;border:1px solid transparent;border-radius:10px;margin-bottom:6px;min-height:110px}.timeline-event:hover{background:#f0f4eb}.timeline-event[aria-pressed=true]{background:#eaf2df;border-color:#d2e0c3}.timeline-event>span:first-child{font-size:11px;color:#8a9b76;padding-top:3px}.timeline-event>span:first-child:after{content:'';display:block;height:27px;width:1px;background:#bdcca8;margin:11px 0 0 3px}.timeline-event b{font-size:14px;line-height:1.45;font-weight:600;display:block}.timeline-event small{display:block;margin-top:8px;font-size:11px;color:var(--muted);line-height:1.7}.timeline-detail{position:sticky;top:22px;border-radius:14px;background:var(--ink);color:white;padding:37px}.timeline-detail .reader-label{color:#b8d98a}.timeline-detail h3{font-size:31px;line-height:1.2;margin:14px 0 22px}.timeline-detail>p{font-size:14px;line-height:1.85;color:#d0dfd5}.timeline-meaning{padding:22px 0;margin-top:20px;border-top:1px solid #ffffff22}.timeline-meaning h4{font-size:11px;font-weight:550;text-transform:uppercase;letter-spacing:.1em;color:#c5e59d;margin:0 0 12px}.timeline-meaning p{color:#c2d6cb;font-size:13px;line-height:1.85}.timeline-detail .source-citation{color:#c6e897}.timeline-detail .timeline-source{display:block;font-size:11px;line-height:1.6;margin-top:11px;color:#b0c4b7;text-decoration:underline;text-underline-offset:4px}.timeline-topic-link{display:inline-block;margin-top:28px;padding:11px 15px;border:1px solid #7a9b82;border-radius:7px;font-size:12px;color:#d9edbd}.timeline-context{font-size:11px;line-height:1.8;color:var(--muted);border-top:1px solid var(--line);margin-top:26px;padding-top:20px}.timeline-year-label{padding:14px 16px 8px;font-size:10px;font-weight:600;text-transform:uppercase;letter-spacing:.1em;color:#71845b}
.source-heading{display:flex;justify-content:space-between;gap:30px;align-items:start;margin:0 0 25px}.source-heading p{font-size:13px;line-height:1.8;color:var(--muted);max-width:520px}.source-controls{display:grid;grid-template-columns:minmax(230px,1fr) auto;align-items:center;gap:20px;margin-bottom:25px}.source-kind-filters{display:flex;flex-wrap:wrap;gap:7px}.source-kind-filters button{padding:9px 13px;font-size:11px}.source-library-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.source-library-grid .paper-card{background:white}.source-result-count{font-size:11px;margin-bottom:16px;color:var(--muted)}.source-no-results{grid-column:1/-1;padding:45px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:10px}
.roles-explorer{margin:26px 0;border:1px solid #e0e8d7;border-radius:9px;overflow:hidden}.roles-buttons{display:flex;background:#f1f6eb;border-bottom:1px solid #e0e8d7}.roles-buttons button{flex:1;font-size:12px;background:transparent;padding:13px;color:#6c7d5e;border-bottom:2px solid transparent}.roles-buttons button[aria-pressed=true]{color:var(--green);background:white;border-color:#7f9e53}.role-explanation{padding:20px 23px}.role-explanation h4{margin:0 0 10px;font-size:14px}.role-explanation p{font-size:13px;line-height:1.85;color:#64765d}.role-flow{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:16px 0 12px}.role-flow span{font-size:10px;padding:8px 11px;background:#edf4e2;border-radius:6px}.role-flow i{font-style:normal;font-size:13px;color:#829f5c}.role-explanation .role-footnote{font-size:11px;color:#8a9880}
@media(min-width:1450px){.atlas-layout{grid-template-columns:275px minmax(0,1fr);gap:45px}.reader-header,.reader-body{padding-left:42px;padding-right:42px}}
@media(max-width:1150px){.site-header .edition{display:none}.technology-heading{grid-template-columns:1fr 220px}.technology-meta{padding-left:24px}.atlas-layout{grid-template-columns:225px minmax(0,1fr);gap:24px}.reader-header,.reader-body{padding:26px}.reader-tabs{padding:0 26px;gap:17px}.timeline-layout{gap:25px}.timeline-detail{padding:27px}.source-controls{grid-template-columns:1fr}.source-kind-filters{justify-content:start}}
@media(max-width:850px){.site-header{height:auto;min-height:88px;flex-wrap:wrap;padding-top:18px;padding-bottom:12px;gap:14px}.site-header nav{width:100%;overflow:auto;gap:5px}.site-header nav a{padding:8px 12px;font-size:12px}.technology-heading{grid-template-columns:1fr;padding:39px 0 28px;gap:25px}.technology-heading h1{font-size:48px}.technology-meta{border-left:0;border-top:1px solid var(--line);padding:20px 0 0;display:flex;align-items:center;gap:23px}.atlas-mark,.technology-meta>p{display:none}.technology-meta>span:last-child{margin:0;font-size:10px}.technology-navigation{gap:23px;margin-bottom:25px}.technology-navigation>a{font-size:12px;padding:12px 0}.technology-navigation>a>span{margin-left:10px}.atlas-layout{grid-template-columns:1fr;gap:20px}.atlas-sidebar{position:static}.mobile-topics-toggle{display:flex;justify-content:space-between;align-items:center;width:100%;padding:12px 14px;background:#eaf1e2;border:1px solid #dbe5d1;border-radius:8px;font-size:13px;font-weight:600;margin-bottom:13px}.atlas-sidebar.collapsed .atlas-sidebar-content{display:none}.atlas-topic-list{max-height:300px}.atlas-sidebar-content{padding:0 1px 14px}.atlas-topic{padding:10px}.atlas-group-title{padding-top:12px}.reader-header h2{font-size:29px}.timeline-intro{display:block}.timeline-intro p{margin-top:17px}.timeline-layout{grid-template-columns:1fr;gap:25px}.timeline-events{max-height:360px}.timeline-detail{position:static}.timeline-years{gap:7px}.timeline-years button{padding:8px 13px}.source-heading{display:block}.source-heading p{margin-top:16px}.source-library-grid{grid-template-columns:1fr}.technology-footer{display:block}.technology-footer a{display:inline-block;margin-top:12px}.chapter-sidebar .atlas-topic-list{max-height:300px}.chapter-navigation{flex-direction:column;align-items:start}.chapter-navigation a{max-width:100%}.chapter-navigation a:last-child{text-align:left}}
@media(max-width:520px){.technology-heading h1{font-size:39px}.technology-intro{font-size:14px}.technology-meta{gap:15px}#technology-counts{gap:15px}#technology-counts b{font-size:20px}.technology-meta>span:last-child{max-width:110px}.reader-header,.reader-body{padding:22px 18px}.reader-tabs{padding:0 18px;gap:19px}.reader-kicker{flex-wrap:wrap;gap:6px;font-size:9px}.reader-header h2{font-size:26px}.reader-header>p{font-size:13px}.reader-section>p,.control-lens p{font-size:13px}.control-lens{padding:18px}.tradeoffs{grid-template-columns:1fr;gap:12px}.learning-video{grid-template-columns:30px 1fr;gap:10px;padding:15px}.learning-video .video-play{height:28px;width:28px;font-size:10px}.paper-card{grid-template-columns:23px 1fr 12px;padding:13px 10px;gap:8px}.timeline-detail{padding:26px 22px}.timeline-detail h3{font-size:28px}.timeline-event{grid-template-columns:47px 1fr;gap:12px;padding:16px 12px}.timeline-intro h2,.source-heading h2{font-size:26px}.report-chapter-header{display:block}.report-chapter-header h3{margin-top:9px;font-size:21px}.roles-buttons button{font-size:11px;padding:12px 7px}.technology-video-dialog .dialog-top h2{font-size:18px}.technology-video-dialog .dialog-top{gap:10px}}
@media(prefers-reduced-motion:reduce){.technology-page *{scroll-behavior:auto!important;transition:none!important}}

/* Reading guides stay with their references throughout the explorer. */
.paper-card{grid-template-columns:28px minmax(0,1fr);background:var(--surface,var(--white));padding:20px 19px;border-color:var(--line)}
.paper-content{min-width:0}.paper-title-link{display:flex;align-items:flex-start;justify-content:space-between;gap:14px;color:var(--ink)}
.paper-title-link b{font-size:13px;font-weight:600}.paper-title-link:hover b{text-decoration:underline;text-underline-offset:4px}
.paper-title-link .paper-arrow{flex-shrink:0;color:var(--green)}
.source-reading-guide{border-top:1px solid var(--line);margin-top:13px;padding-top:12px}
.source-why-label{display:block;font-size:9px;font-weight:700;text-transform:uppercase;letter-spacing:.1em;color:var(--green);margin-bottom:6px}
.source-why{font-size:12px;line-height:1.8;color:var(--muted);margin:0}
button.source-citation{font:inherit;font-size:11px;background:transparent;color:var(--green);padding:0 2px;border:0;border-bottom:1px dotted currentColor;vertical-align:baseline;cursor:pointer;border-radius:2px}
button.source-citation:hover,button.source-citation:focus-visible{background:var(--accent-soft,var(--lime));color:var(--green)}
.citation-preview{position:fixed;z-index:90;width:min(380px,calc(100vw - 24px));padding:19px 20px;background:var(--surface,var(--white));border:1px solid var(--accent-line,var(--line));border-radius:12px;box-shadow:var(--shadow);color:var(--ink);pointer-events:none}
.citation-preview>b{display:block;font-size:13px;line-height:1.55;margin-bottom:9px}.citation-preview>p{font-size:12px;line-height:1.75;color:var(--muted);margin:0}.citation-preview>small{display:block;font-size:10px;color:var(--muted);margin-top:10px}
.source-guide-dialog{width:min(620px,92vw);padding:30px;background:var(--surface,var(--white))}
.source-guide-dialog .dialog-top{align-items:flex-start;margin-bottom:15px}.source-guide-dialog .dialog-top h2{font-size:25px;line-height:1.3;letter-spacing:-.035em}
.source-guide-meta{font-size:12px;color:var(--muted);line-height:1.8}
.source-guide-explanation{background:var(--surface-soft,var(--paper));border:1px solid var(--line);padding:21px 23px;border-radius:10px;margin:23px 0}
.source-guide-explanation p{font-size:14px;color:var(--ink);line-height:1.85;margin:0}
.source-guide-dialog .button{font-size:13px}.source-guide-url{overflow-wrap:anywhere;font-size:10px;color:var(--muted);margin-top:13px;line-height:1.7}
.timeline-reading-list{padding-top:5px}.timeline-source-note+.timeline-source-note{border-top:1px solid #ffffff26;padding-top:15px;margin-top:18px}
.timeline-detail .timeline-source-note .timeline-source{margin:0 0 9px;color:var(--on-strong,#fff);font-size:12px;font-weight:550;line-height:1.7}
.timeline-source-note p{font-size:12px;line-height:1.85;color:var(--strong-muted,#c2d6cb);margin:0}

/* Real embedded players are shared by topic pages and the video library. */
.learning-video{display:block;padding:0;border-radius:12px;overflow:hidden;background:var(--surface,var(--white))}
.inline-video{position:relative;width:100%;aspect-ratio:16/9;background:var(--strong-surface,#13283b)}
.inline-video iframe{display:block;width:100%;height:100%;border:0}
.learning-video-copy{padding:22px 24px}.learning-video h4{font-size:16px;line-height:1.5;margin:7px 0 17px;font-family:var(--display);letter-spacing:-.02em}
.learning-video .video-kind{color:var(--muted)}.learning-video p{font-size:13px;line-height:1.8}
.video-learning-guide{margin-top:18px;border-top:1px solid var(--line);padding-top:14px;color:var(--muted);font-size:12px}
.video-learning-guide summary{cursor:pointer;color:var(--ink);font-weight:600}.video-learning-guide .video-watch-points{margin:12px 0 2px;font-size:12px}
.learning-video .video-actions{margin-top:18px;gap:20px}.learning-video .video-actions a,.learning-video .video-actions button{color:var(--green);font-size:11px}
.learning-video .video-inline-note{font-size:10px;line-height:1.6;margin-top:12px;color:var(--muted)}
.mechanism-video-section{margin-top:33px;padding-top:28px;border-top:1px solid var(--line)}.mechanism-video-section>h3{font-size:19px;letter-spacing:-.025em;margin-bottom:18px}
.source-library-grid .learning-video{align-self:start}.source-library-grid .learning-video h4{font-size:15px}
@media(max-width:520px){.paper-card{grid-template-columns:22px minmax(0,1fr);padding:17px 13px;gap:9px}.learning-video-copy{padding:19px 17px}.learning-video h4{font-size:15px}.learning-video p{font-size:12px}.source-guide-dialog{padding:22px}.source-guide-dialog .dialog-top h2{font-size:21px}.source-guide-explanation{padding:17px}.source-guide-explanation p{font-size:13px}}