:root{--paper:#fff;--ink:#18181b;--muted:#66666f;--line:#e5e5e9;--accent:#19191d;--soft:#f0f1f3;--rail-width:224px;color-scheme:light;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}button,input,textarea,select{font:inherit}button{cursor:pointer;color:inherit}a{color:var(--ink);text-underline-offset:4px}button,a,input,textarea,select{outline-offset:4px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--accent)}button:disabled{cursor:wait;opacity:.5}.shell{display:flex;min-height:100dvh}.rail{width:var(--rail-width);position:fixed;inset:0 auto 0 0;border-right:1px solid var(--line);padding:32px 20px;display:flex;flex-direction:column;background:#fff}.wordmark,.mobile-logo{font:700 26px/1.2 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;letter-spacing:-1px;text-decoration:none;color:var(--ink)}.wordmark{padding:0 12px}.rail-note{color:var(--muted);font-size:13px;line-height:1.6;margin:20px 12px 36px}.rail nav{display:grid;gap:4px}.nav{border:0;text-align:left;background:transparent;min-height:48px;padding:12px;border-radius:10px;color:var(--muted);font-size:14px;display:flex;align-items:center;gap:12px}.nav.active{background:var(--soft);color:var(--ink);font-weight:600}.nav-icon{font-size:19px;line-height:1;min-width:20px;text-align:center}.rail-foot{margin-top:auto;font-size:12px;padding:12px;color:var(--muted)}.rail-foot small{display:block;font-size:11px;margin-top:4px}.dot{display:inline-block;width:5px;height:5px;background:var(--ink);border-radius:50%;margin-right:7px}main{margin-left:var(--rail-width);width:calc(100% - var(--rail-width));min-width:0}.top{height:76px;display:flex;align-items:center;justify-content:space-between;padding:0 40px;border-bottom:1px solid var(--line);gap:16px}.eyebrow{font-size:11px;line-height:1.5;letter-spacing:1.2px;font-weight:600;color:var(--muted)}.quiet{border:0;border-radius:8px;min-height:44px;padding:8px 0;background:transparent;font-size:13px;color:var(--muted)}.mobile-logo{display:none}#chat-view{max-width:748px;margin:auto;padding:36px 24px 24px;min-height:calc(100dvh - 76px);display:flex;flex-direction:column}.welcome{text-align:left;display:flex;flex-direction:column;justify-content:center;flex:1;min-height:350px;padding:10px 0 28px}.topic-entry{align-self:flex-start;background:var(--soft);border:1px solid var(--line);border-radius:20px;padding:8px 16px;min-height:44px;font-size:13px;margin-bottom:34px}.welcome h1,.library-head h1{font:650 44px/1.15 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;letter-spacing:-1.5px;margin:0 0 20px}.lede{color:var(--muted);font-size:16px;line-height:1.6;margin:0}.welcome .eyebrow{display:none}.suggestions{display:flex;flex-direction:column;gap:0;margin:30px 0 0;border-top:1px solid var(--line)}.suggestions button{min-width:0;min-height:50px;background:transparent;border:0;border-bottom:1px solid var(--line);padding:13px 0;font-size:14px;text-align:left;line-height:1.6;display:flex;align-items:center;justify-content:space-between;gap:16px}.suggestions span{color:var(--ink);font-size:16px}.composer-wrap{margin-top:auto;position:sticky;bottom:0;background:#fff;padding:18px 0 0;z-index:2}.modes{padding:0;border:0;display:flex;flex-wrap:wrap;justify-content:flex-start;gap:4px;margin:0 0 12px;min-width:0}.modes label{position:relative;display:flex;min-height:44px;align-items:center}.modes input{position:absolute;opacity:0;width:100%;height:100%;margin:0;cursor:pointer}.modes span{display:block;padding:8px 12px;border-radius:18px;font-size:12px;cursor:pointer;color:var(--muted);white-space:nowrap}.modes input:checked+span{background:var(--soft);color:var(--ink);font-weight:650}.modes input:focus-visible+span{outline:2px solid var(--accent);outline-offset:2px}#ask{background:var(--soft);border:1px solid var(--line);border-radius:20px;padding:14px 14px 10px;box-shadow:none}textarea{display:block;width:100%;border:0;background:transparent;resize:vertical;min-height:46px;max-height:180px;color:var(--ink);font-size:16px;line-height:1.5;padding:0 2px}textarea:focus{outline:none}#ask:focus-within{border-color:#9999a1}textarea::placeholder{color:var(--muted)}.composer-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:11px;color:var(--muted);margin-top:4px}.composer-bottom>div{display:flex;align-items:center;gap:8px;flex-shrink:0}.send{background:var(--accent);color:#fff;width:44px;height:44px;border-radius:50%;border:0;font-size:25px;line-height:1}.icon-btn{border:0;background:transparent;width:44px;height:44px;display:inline-grid;place-items:center;color:var(--muted)}.icon-btn svg{width:20px;height:24px;pointer-events:none}.fine{font-size:12px;color:var(--muted);line-height:1.6}.composer-wrap>.fine{text-align:center;margin:10px 0 0}#conversation:empty{display:none}.turn{padding-bottom:40px;scroll-margin-top:24px}.user{margin:0 0 30px auto;background:var(--soft);border-radius:18px;padding:16px 20px;max-width:88%;overflow-wrap:anywhere;font-size:15px}.answer h2{font:650 30px/1.2 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;letter-spacing:-.7px;margin:14px 0 20px}.answer>p{color:var(--muted)}.evidence-card{border:0;border-bottom:1px solid var(--line);border-radius:0;padding:24px 0;margin:0;background:#fff;overflow-wrap:anywhere}.evidence-card h3{font-size:22px;line-height:1.3;letter-spacing:-.4px;font-weight:650;margin:12px 0 16px}.badge{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);line-height:1.6}.evidence-card p{font-size:16px;margin:14px 0;line-height:1.65;white-space:pre-line;color:var(--ink)}.evidence-card p.fine{font-size:13px;color:var(--muted);margin:10px 0}.action-block{border-top:1px solid var(--line);margin:22px 0 16px;padding-top:18px}.action-block h4{font-size:15px;margin:0 0 8px;font-weight:650}.action-block p{margin:0;color:var(--muted)}.lesson-actions{display:flex;flex-wrap:wrap;gap:8px 20px;align-items:center}.source-button,.read{border:0;background:none;padding:10px 0;min-height:44px;color:var(--ink);font-size:13px;line-height:1.5;text-decoration:underline;text-underline-offset:4px;text-align:left}.read{margin-right:16px}.followup{font-size:17px;line-height:1.6;margin:26px 0;color:var(--ink)!important}.library-head{margin-bottom:28px}.library-head h1{font-size:38px;line-height:1.15;margin:14px 0 18px}#library-view,#saved-view{max-width:748px;margin:auto;padding:36px 24px 56px}.filters{display:grid;gap:18px;min-width:0}.filters input{width:100%;min-width:0;padding:14px 16px;background:var(--soft);border:1px solid var(--line);border-radius:14px;font-size:16px;min-height:50px;color:var(--ink)}.filters select{min-height:44px;border:1px solid var(--line);background:var(--soft);border-radius:22px;padding:9px 32px 9px 14px;max-width:100%;min-width:0;font-size:13px;color:var(--ink)}.topic-people{display:flex;flex-direction:column;align-items:flex-start;gap:7px;min-width:0}.topic-filter{max-width:100%;display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--muted)}.people-filter{align-self:stretch;display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--muted);margin-left:13px;min-width:0}.people-filter select{align-self:flex-start;background:#fff;max-width:calc(100% - 1px)}.filter-utilities{display:flex;flex-wrap:wrap;gap:8px}.filter-utilities select{background:#fff;border-radius:9px}#result-count{margin:22px 0 0}.parallels{background:var(--soft);border:0;border-radius:14px;margin:22px 0 0;padding:20px;overflow-wrap:anywhere}.parallels>h3{font:650 20px/1.35 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;letter-spacing:-.3px;margin:0 0 20px}.parallel-item{padding:18px 0 0;border:0;border-top:1px solid #dadae0;margin:18px 0 0}.parallel-item:first-child{margin-top:0}.parallel-item h4{font-size:16px;line-height:1.4;margin:0 0 12px}.parallel-item p{font-size:15px;line-height:1.65;margin:12px 0}.parallel-item .fine{font-size:12px;color:var(--muted)}.parallel-item button{display:block;text-align:left;white-space:normal;overflow-wrap:anywhere}.saved-card{border-bottom:1px solid var(--line);padding:22px 0;overflow-wrap:anywhere}.saved-card h2{font-size:19px;line-height:1.4;font-weight:600;margin:10px 0}.saved-card p{margin:0}.saved-resume{background:var(--ink);border:0;color:white;border-radius:22px;min-height:44px;padding:10px 18px;margin:20px 0}dialog{border:1px solid var(--line);border-radius:20px;background:#fff;padding:32px;max-width:640px;width:calc(100% - 32px);max-height:85dvh;overflow:auto;color:var(--ink);box-shadow:0 20px 80px #18181b24}dialog::backdrop{background:#18181b40;backdrop-filter:blur(2px)}dialog h2{font:650 26px/1.25 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;letter-spacing:-.6px;margin:16px 0 22px;overflow-wrap:anywhere}dialog p{font-size:16px;line-height:1.65;overflow-wrap:anywhere}.close{float:right;border:0;background:transparent;font-size:27px;width:44px;height:44px;margin:-12px -12px 0 12px;border-radius:50%}.provenance{font-size:13px;color:var(--muted);overflow-wrap:anywhere}dialog a{display:inline-block;margin:0 18px 0 0;padding:10px 0;min-height:44px;font-size:14px;overflow-wrap:anywhere}.mobile-nav{display:none}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}@media(min-width:1200px){#chat-view{padding-top:48px}.welcome h1{font-size:48px}.welcome{min-height:400px}}@media(max-width:760px){.rail{display:none}main{margin:0;width:100%}.top{height:68px;padding:0 24px;border-bottom:0}.top>.eyebrow{display:none}.mobile-logo{display:block;font-size:24px;letter-spacing:-.7px}.quiet{font-size:12px}.welcome h1{font-size:34px;line-height:1.18;letter-spacing:-1px;margin:0 0 22px}.welcome{min-height:280px;padding:8px 0 24px;justify-content:center}.topic-entry{margin-bottom:30px}.lede{font-size:15px;line-height:1.6}.suggestions{margin:28px 0 0}.suggestions button{font-size:14px;min-height:48px}.modes{gap:0;margin-bottom:8px}.modes span{padding:8px 10px;font-size:12px}.composer-bottom{font-size:11px;align-items:center;gap:6px}.composer-bottom>span{max-width:calc(100% - 100px)}.mobile-nav{display:flex;justify-content:space-around;position:fixed;bottom:0;left:0;right:0;border-top:1px solid var(--line);background:#fff;padding:6px 12px max(8px,env(safe-area-inset-bottom));z-index:5;min-height:68px}.mobile-nav .nav{display:flex;flex-direction:column;justify-content:center;gap:3px;min-height:50px;min-width:72px;padding:6px 12px;background:transparent;border-radius:8px;font-size:11px;line-height:1.3;text-align:center}.mobile-nav .nav.active{background:transparent;font-weight:650;color:var(--ink)}.mobile-nav .nav-icon{font-size:20px}.mobile-nav .nav.active:after{content:'';display:block;height:2px;width:18px;background:var(--ink);border-radius:2px;margin-top:2px}#chat-view{padding:18px 24px calc(88px + env(safe-area-inset-bottom));min-height:calc(100dvh - 68px)}.composer-wrap{position:sticky;bottom:calc(68px + env(safe-area-inset-bottom));padding-top:12px}.composer-wrap>.fine{font-size:11px}#library-view,#saved-view{padding:20px 24px calc(96px + env(safe-area-inset-bottom))}.library-head h1{font-size:32px;letter-spacing:-1px}.library-head .lede{font-size:15px}.turn{padding-bottom:32px}.user{font-size:15px;margin-bottom:28px;padding:16px;max-width:91%}.answer h2{font-size:26px;letter-spacing:-.6px}.evidence-card{padding:24px 0}.evidence-card h3{font-size:23px}.evidence-card p{font-size:16px}.parallels{padding:18px 16px;margin-top:20px}.parallels>h3{font-size:20px}.parallel-item p{font-size:15px}dialog{padding:24px;max-height:calc(100dvh - 24px);width:calc(100% - 24px);border-radius:20px}dialog h2{font-size:26px}.keyboard-open .mobile-nav{display:none}.keyboard-open .composer-wrap{bottom:0}.keyboard-open #chat-view{padding-bottom:20px}}@media(max-width:350px){.top{padding:0 20px}#chat-view,#library-view,#saved-view{padding-left:20px;padding-right:20px}.welcome h1{font-size:34px}.modes span{font-size:11px;padding:8px 9px}.composer-bottom>span{font-size:10px}.parallels{padding:16px 12px}}@media(max-height:650px) and (max-width:760px){.welcome{min-height:180px;padding-top:0;justify-content:flex-start}.topic-entry{margin-bottom:18px}.suggestions{margin-top:20px}.composer-wrap{position:relative;bottom:auto}.welcome h1{margin-bottom:16px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.suggestion-more{border-bottom:1px solid var(--line)}.suggestion-more summary{cursor:pointer;min-height:44px;padding:12px 0;color:var(--muted);font-size:13px}.suggestion-more summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.suggestion-more button:last-child{border-bottom:0}
@media(max-width:760px){#chat-view{height:calc(var(--visual-height,100dvh) - 68px);min-height:0;overflow:hidden;padding-bottom:calc(76px + env(safe-area-inset-bottom))}.welcome{min-height:0;overflow-y:auto;justify-content:flex-start;flex:1;padding-bottom:18px}#conversation{min-height:0;overflow-y:auto;overscroll-behavior:contain;flex:1;padding-bottom:8px}.composer-wrap{position:relative;bottom:auto;flex-shrink:0;padding-top:12px}textarea{resize:none;max-height:min(140px,25dvh)}.keyboard-open .top{display:none}.keyboard-open #chat-view{height:var(--visual-height,100dvh);padding-top:8px;padding-bottom:8px}.keyboard-open .composer-wrap{bottom:auto}} 
.wordmark{min-height:44px;display:flex;align-items:center}@media(max-width:760px){.mobile-logo{min-height:44px;display:flex;align-items:center}}#people-note{max-width:440px;margin:4px 0 0}
/* Governing correction: one neutral surface and immediately visible top navigation. */
:root{--paper:#fff;--ink:#18181b;--accent:#19191d;--muted:#666;--line:#e5e5e5;--soft:#f5f5f5;--header-height:73px}.shell{display:block}main{margin-left:0;width:100%}.rail,.mobile-nav{display:none!important}.top{height:var(--header-height);position:sticky;top:0;z-index:8;padding:0 24px;background:#fff;border-bottom:1px solid var(--line)}.top-inner{width:100%;height:100%;max-width:1100px;margin:auto;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:24px}.wordmark{padding:0;font-size:24px;letter-spacing:-.7px}.top .quiet{justify-self:end}.primary-nav{display:flex;align-items:center;gap:2px;padding:2px;border-radius:10px;background:var(--soft);height:48px}.primary-nav .nav{display:block;min-width:84px;min-height:44px;padding:10px 16px;text-align:center;border-radius:8px;font-size:13px;color:var(--muted);background:transparent;line-height:24px}.primary-nav .nav.active{background:#fff;color:var(--ink);font-weight:600;box-shadow:0 1px 3px #0000000a}#chat-view{min-height:calc(100dvh - var(--header-height));padding-top:40px}.welcome{justify-content:center;min-height:280px}.welcome h1{font-size:34px;line-height:1.18;letter-spacing:-1px}.suggestions{max-width:620px}.primary-lesson{padding:0;border:0}.primary-lesson h2{font:650 26px/1.25 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;letter-spacing:-.6px;margin:0 0 26px}.primary-lesson>.badge{display:block;margin:0 0 10px}.primary-lesson>p.fine{margin:0 0 20px;font-size:13px}.primary-lesson>p:not(.fine){margin:0;font-size:16px;line-height:1.65}.primary-lesson .action-block{margin-top:28px;padding-top:22px}.more-lessons{border-top:1px solid var(--line);margin-top:22px}.more-lessons>summary{cursor:pointer;min-height:48px;padding:14px 0;font-size:14px;color:var(--muted)}.more-lessons>summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.more-lessons .evidence-card{padding:20px 0}.more-lessons .evidence-card h3{font-size:20px}.answer .followup{font-size:15px;color:var(--muted)!important;margin:20px 0 12px}.parallels{background:transparent;border-radius:0;border-top:1px solid var(--line);padding:22px 0 0;margin-top:20px}.parallel-item{border-color:var(--line)}.library-head h1{font-size:28px;line-height:1.2;letter-spacing:-.7px;margin:12px 0 16px}.library-head{margin-bottom:24px}.user{margin-bottom:36px}.composer-wrap{box-shadow:none}#library-view,#saved-view{padding-top:32px}.keyboard-open .top{display:block}
@media(max-width:760px){:root{--header-height:117px}.top{height:117px;padding:8px 24px}.top-inner{grid-template-columns:1fr auto;grid-template-rows:44px 48px;gap:8px 12px}.primary-nav{grid-column:1/-1;grid-row:2;justify-self:stretch}.primary-nav .nav{flex:1;min-width:0}.top .quiet{font-size:12px;padding:0;grid-column:2;grid-row:1}.wordmark{grid-column:1;grid-row:1}#chat-view{height:calc(var(--visual-height,100dvh) - var(--header-height));min-height:0;padding:24px 24px 18px}.welcome{min-height:0;justify-content:center;padding:0 0 16px}.welcome h1{font-size:34px;margin-bottom:22px}.welcome .suggestions{margin-top:26px}.user{margin-bottom:32px}.primary-lesson h2{font-size:26px;margin-bottom:24px}.composer-wrap{bottom:auto;padding-top:14px}.composer-wrap>.fine{margin-top:8px}#library-view,#saved-view{padding:28px 24px 40px}.keyboard-open .top{height:52px;padding:4px 24px}.keyboard-open .top-inner{display:flex;justify-content:space-between}.keyboard-open .wordmark{display:none}.keyboard-open .primary-nav{flex:1}.keyboard-open .top .quiet{display:none}.keyboard-open #chat-view{height:calc(var(--visual-height,100dvh) - 52px);padding-top:8px;padding-bottom:8px}}
@media(max-width:350px){.top{padding-left:20px;padding-right:20px}#chat-view,#library-view,#saved-view{padding-left:20px;padding-right:20px}.primary-nav .nav{min-width:0;padding-left:10px;padding-right:10px}.top .quiet{font-size:11px}.keyboard-open .top{padding-left:20px;padding-right:20px}}
.turn{scroll-margin-top:calc(var(--header-height) + 24px)}@media(max-width:760px){.turn{scroll-margin-top:8px}}
#ask{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:0 8px;padding:8px 10px 8px 16px;min-height:62px}#question{grid-column:1;grid-row:1;min-height:44px;height:44px;padding:10px 0;line-height:24px;resize:none}.composer-bottom{display:contents}.composer-bottom>div{grid-column:2;grid-row:1;display:flex;gap:4px;align-self:end}#voice-state{grid-column:1/-1;grid-row:2;max-width:none;padding:6px 0 2px;font-size:11px;line-height:1.5}#voice-state:empty{display:none}.composer-wrap{padding-bottom:4px}@media(max-width:760px){.composer-bottom>span{max-width:none}#question{max-height:min(140px,25dvh)}}
#ask:focus-within{border-color:#767676}

/* Requested progressive disclosure; surrounding visual system stays unchanged. */
.lesson-bullets{margin:0;padding-left:22px}.lesson-bullets li{padding-left:4px}.lesson-bullets h2,.lesson-bullets h3{margin:0;font-size:18px;line-height:1.55;letter-spacing:-.15px;font-weight:550}.primary-lesson .lesson-bullets h2{font-size:20px;margin:0}.lesson-detail>summary{cursor:pointer;min-height:44px;display:list-item;padding:12px 0;font-size:14px;color:var(--ink)}.lesson-detail>summary:focus-visible{outline:2px solid var(--accent);outline-offset:4px}.lesson-body{padding:0 0 14px}.lesson-body p{white-space:pre-line;overflow-wrap:anywhere}.evidence-card .fine{margin:10px 0 0}.answer>.evidence-card{margin:0 0 18px;padding:20px 0;border-bottom:1px solid var(--line)}.answer>.primary-lesson{padding-top:0}.lesson-detail[open]{margin-bottom:8px}@media(max-width:760px){.lesson-bullets h2,.primary-lesson .lesson-bullets h2{font-size:18px}.lesson-detail>summary{min-height:48px}}

.top-actions{display:flex;align-items:center;gap:16px}.top-actions .quiet{min-height:44px}#install-dialog{max-width:460px}#install-dialog p{line-height:1.65}@media(max-width:600px){.top-inner{flex-wrap:wrap}.top-actions{width:100%;justify-content:center;gap:24px}.top-actions .quiet{font-size:12px}.primary-nav{margin-left:auto}}

.top-actions{justify-self:end}@media(max-width:760px){.top-actions{grid-column:2;grid-row:1;gap:12px;width:auto;justify-content:flex-end}.top-actions .quiet{font-size:11px}.keyboard-open .top-actions{display:none}.primary-nav{margin-left:0}}

.lesson-body>.source-button{margin-right:16px;min-height:44px}