/* The same five knowledge layers connect the hero, course index and reading view. */
.module-tab,.timeline-open,#timelineYears button,.timeline-points button{background:transparent}
#timelineCount{font-size:13px;color:var(--muted);line-height:1.9;margin:0 0 18px}
#uncertainTimeline>p{font-size:13px;line-height:1.8;color:var(--muted);margin-top:12px}
.chronology-sort{display:flex;align-items:center;gap:12px}
.module-nav{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin:30px 0 0}
.module-tab{display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:7px;min-height:86px;padding:16px 18px;color:var(--muted);border:1px solid var(--line);border-radius:12px;text-align:left;transition:background .2s,color .2s,transform .2s}
.module-tab>span{font-size:16px;font-weight:600;color:var(--ink)}
.module-tab small{font-size:12px;font-variant-numeric:tabular-nums}
.module-tab:hover{background:var(--soft);transform:translateY(-2px)}
.module-tab[aria-pressed=true]{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.module-tab[aria-pressed=true]>span{color:inherit}
.module-context{min-height:128px;display:flex;justify-content:space-between;align-items:center;gap:28px;padding:24px 4px;color:var(--muted);border-bottom:1px solid var(--line)}
.module-context h3{font-size:23px;line-height:1.3;color:var(--ink);margin:0 0 9px;font-weight:600}
.module-context p{font-size:14px;line-height:1.9;max-width:680px;margin:0}
.module-context p>span{display:block;font-size:12px;opacity:.85;margin-top:6px}
.module-subtopics{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px;max-width:350px}
.module-subtopics span,.reading-modules button{border:1px solid var(--line);border-radius:100px;padding:8px 13px;font-size:12px;line-height:1.5;white-space:nowrap}
.reading-modules{display:flex;gap:8px;flex-wrap:wrap;margin:24px 0 0}
.reading-modules button{color:var(--accent);min-height:40px;cursor:pointer;background:var(--soft)}
.reading-modules button:hover{border-color:var(--accent)}
.module-evidence{margin:20px 0 38px;padding:16px 20px;border:1px solid var(--line);border-radius:10px;color:var(--muted);font-size:13px;line-height:1.9}
.module-evidence>summary{color:var(--ink);cursor:pointer;min-height:24px}
.module-evidence h3{font-size:14px;color:var(--ink);margin:20px 0 4px}.module-evidence ul{padding-left:20px;margin:0}
.module-evidence p{margin:14px 0 0}.module-evidence li+li{margin-top:6px}
.chronology-section{max-width:1600px;margin:0 auto;padding:90px clamp(24px,4.5vw,82px) 100px;scroll-margin-top:30px;border-top:1px solid var(--line)}
.chronology-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;margin-bottom:34px}
.chronology-heading h2{font-size:clamp(32px,3.8vw,56px);font-weight:600;line-height:1.3;letter-spacing:-.04em;margin:0 0 18px}
.chronology-heading p{color:var(--muted);font-size:14px;line-height:1.9;max-width:650px;margin:0}
.chronology-controls{flex-shrink:0;display:flex;align-items:center;gap:10px}.chronology-controls label{color:var(--muted);font-size:13px}
#timelineOrder{color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:8px;min-height:44px;padding:10px 32px 10px 14px;font:inherit;font-size:13px}
#timelineYears{display:flex;gap:24px;align-items:center;flex-wrap:wrap;padding:18px 0;border-block:1px solid var(--line);margin-bottom:50px}
#timelineYears button{font-size:15px;min-height:44px;color:var(--ink);border-radius:5px}
#timelineYears button:hover{color:var(--accent)}
#timelineYears small{font-size:12px;color:var(--muted);margin-left:8px}
.timeline-expand{margin-left:auto;display:flex;gap:18px}
.timeline-expand button{font-size:12px!important;color:var(--muted)!important}
.timeline-year{display:grid;grid-template-columns:160px minmax(0,1fr);column-gap:46px;scroll-margin-top:30px;margin-top:60px}
.timeline-year-title{grid-column:1;grid-row:1 / span 24;font-family:var(--display-font);font-size:52px;font-weight:500;letter-spacing:-.045em;line-height:1.2;margin:14px 0;color:var(--ink)}
.timeline-year-title span{display:block;font-family:var(--body-font);font-size:13px;color:var(--muted);margin-top:9px;letter-spacing:0}
.timeline-month{grid-column:2;border-top:1px solid var(--line);min-width:0}
.timeline-month>summary{list-style:none;display:flex;align-items:center;gap:22px;cursor:pointer;min-height:82px;padding:18px 0}
.timeline-month>summary::-webkit-details-marker{display:none}
.timeline-month-name{font-size:23px;min-width:65px;font-weight:500;color:var(--ink)}
.timeline-month-themes{font-size:13px;color:var(--muted);line-height:1.8}
.timeline-month-count{margin-left:auto;white-space:nowrap;font-size:12px;color:var(--muted);font-variant-numeric:tabular-nums}
.timeline-chevron{color:var(--accent);display:flex;transition:transform .22s;transform:rotate(90deg)}
.timeline-month[open] .timeline-chevron{transform:rotate(-90deg)}
.timeline-entries{padding:4px 0 30px}
.timeline-entry{display:grid;grid-template-columns:100px minmax(0,1fr);column-gap:22px;padding:30px 0;position:relative}
.timeline-entry+.timeline-entry{border-top:1px solid var(--line)}
.timeline-date{font-size:18px;line-height:1.7;font-family:var(--display-font);font-variant-numeric:tabular-nums;color:var(--ink)}
.timeline-date>span:last-child{display:block;color:var(--muted);font-family:var(--body-font);font-size:11px;margin-top:5px}
.timeline-content{min-width:0;padding-left:22px;border-left:1px solid var(--line);position:relative}
.timeline-content::before{content:'';position:absolute;left:-4px;top:7px;width:7px;height:7px;border-radius:50%;background:var(--accent)}
.timeline-module-tags{display:flex;flex-wrap:wrap;gap:8px 15px;color:var(--accent);font-size:11px;line-height:1.8;margin-bottom:10px}
.timeline-open{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;width:100%;text-align:left;color:var(--ink);min-height:44px}
.timeline-open h4{font-size:21px;line-height:1.55;font-weight:550;margin:0;max-width:800px}
.timeline-open>.icon{width:20px;min-width:20px;margin-top:6px;transition:transform .2s;color:var(--muted)}
.timeline-open:hover h4{color:var(--accent)}.timeline-open:hover>.icon{transform:translateX(4px);color:var(--accent)}
.timeline-summary{font-size:14px;line-height:1.9;color:var(--muted);max-width:820px;margin:10px 0 16px;text-wrap:pretty;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.timeline-highlights{padding:0;margin:0;list-style:none;display:grid;gap:8px;font-size:13px;line-height:1.8;color:var(--ink)}
.timeline-highlights li{padding-left:15px;position:relative}.timeline-highlights li::before{content:'·';position:absolute;left:0;color:var(--muted)}
.timeline-points{margin-top:16px;font-size:13px;color:var(--muted);line-height:1.9}
.timeline-points summary{cursor:pointer;min-height:36px;padding:6px 0;color:var(--accent);width:fit-content}
.timeline-points ol{padding-left:20px;max-width:780px}.timeline-points li+li{margin-top:8px}
.timeline-points button{min-height:44px;display:flex;align-items:center;gap:10px;color:var(--ink);padding:6px 0}.timeline-points button:hover{color:var(--accent)}
.timeline-full-point{padding:18px 0;border-top:1px solid var(--line)}.timeline-full-point h5{font-size:15px;line-height:1.8;color:var(--ink);margin:0 0 10px}.timeline-full-point .rich-text{font-size:13px;line-height:1.9}.timeline-full-point .caveat{font-size:12px;line-height:1.9}.timeline-point-body{margin-top:16px}
.uncertain-timeline,#uncertainTimeline{border:1px solid var(--line);border-radius:12px;padding:20px 28px;margin-top:60px}
#uncertainSummary{color:var(--muted);font-size:14px;cursor:pointer;min-height:36px;line-height:1.8}
.uncertain-note,.timeline-empty{font-size:14px;line-height:1.9;color:var(--muted);max-width:750px;margin:20px 0}
#uncertainCourses .timeline-entry{grid-template-columns:110px minmax(0,1fr)}
#uncertainCourses .timeline-date>span:first-child{font-size:18px;color:var(--ink)}
.module-tab:focus-visible,.timeline-open:focus-visible,.timeline-month>summary:focus-visible,.timeline-points>summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
@media(max-width:1050px){.module-nav{grid-template-columns:repeat(3,minmax(0,1fr))}.timeline-year{grid-template-columns:100px minmax(0,1fr);gap:24px}.timeline-year-title{font-size:38px}.module-context{align-items:flex-start}.module-subtopics{max-width:240px}.timeline-month-themes{font-size:12px}.timeline-entry{grid-template-columns:78px minmax(0,1fr);gap:14px}}
@media(max-width:700px){.module-nav{gap:6px;margin-top:24px}.module-tab{padding:12px;min-height:75px;border-radius:8px}.module-tab>span{font-size:14px}.module-tab small{font-size:11px}.module-context{display:block;min-height:0;padding:22px 2px}.module-context h3{font-size:21px}.module-subtopics{justify-content:flex-start;max-width:none;margin-top:14px}.module-subtopics span{font-size:11px;padding:6px 10px}.chronology-section{padding:58px 24px 60px}.chronology-heading{display:block;margin-bottom:24px}.chronology-heading h2{font-size:34px;line-height:1.4}.chronology-controls{margin-top:22px}.chronology-heading p{font-size:13px}#timelineYears{gap:12px 22px;margin-bottom:24px}.timeline-expand{margin-left:0;flex-basis:100%;gap:24px}.timeline-year{display:block;margin-top:40px}.timeline-year-title{font-size:36px;margin:0 0 22px}.timeline-year-title span{display:inline;margin-left:10px}.timeline-month>summary{gap:12px;flex-wrap:wrap;min-height:76px}.timeline-month-name{font-size:21px;min-width:55px}.timeline-month-themes{order:4;flex-basis:100%;font-size:11px;margin-top:-8px}.timeline-entry{display:block;padding:24px 0}.timeline-date{display:flex;align-items:center;gap:12px;font-size:14px;margin-bottom:14px}.timeline-date>span:last-child{margin:0}.timeline-content{padding-left:16px}.timeline-open h4{font-size:18px}.timeline-open{gap:12px}.timeline-summary{font-size:13px;line-height:1.85}.timeline-highlights{font-size:12px}.timeline-module-tags{font-size:10px;gap:5px 10px}.timeline-points{font-size:12px}#uncertainTimeline{padding:16px;margin-top:38px}#uncertainSummary{font-size:13px}.module-evidence{padding:14px 16px}}
@media(prefers-reduced-motion:reduce){.module-tab,.timeline-chevron,.timeline-open>.icon{transition:none!important}.module-tab:hover,.timeline-open:hover>.icon{transform:none}}
.motion-off .module-tab,.motion-off .timeline-chevron,.motion-off .timeline-open>.icon{transition:none!important}