:root { color-scheme: light; --ink:#15252b; --muted:#718087; --line:#dce3e0; --paper:#f6f7f3; --card:#fff; --navy:#102b32; --teal:#28665e; --signal:#e3ad4a; --soft:#e9efeb; --shadow:0 15px 40px rgba(20,42,44,.07); }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; background:var(--paper); color:var(--ink); font-family:Arial,Helvetica,sans-serif; font-size:14px; -webkit-font-smoothing:antialiased; }
button,input { font:inherit; }
button { color:inherit; }
.site-shell { min-height:100vh; --ink:#15252b; --muted:#718087; --line:#dce3e0; --paper:#f6f7f3; --card:#fff; --navy:#102b32; --teal:#28665e; --signal:#e3ad4a; --soft:#e9efeb; }
.site-shell.dark { --ink:#e8eeea; --muted:#a2b1b0; --line:#35484b; --paper:#101a1e; --card:#19272b; --navy:#e5ece8; --teal:#8bc7b7; --signal:#efbf60; --soft:#26383a; --shadow:0 15px 40px rgba(0,0,0,.22); color-scheme:dark; }
.topbar { height:72px; padding:0 32px; display:grid; grid-template-columns:1fr auto 1fr; align-items:center; border-bottom:1px solid var(--line); background:var(--card); position:sticky; z-index:20; top:0; }
.brand { display:flex; align-items:center; gap:11px; border:0; background:none; padding:0; text-align:left; cursor:pointer; width:max-content; }
.brand-mark { display:grid; place-items:center; width:39px; height:39px; border-radius:11px 3px 11px 3px; background:var(--navy); color:#f4f4ed; position:relative; line-height:1; font-size:16px; font-weight:800; letter-spacing:-1px; }
.brand-mark i { font-style:normal; color:var(--signal); font-size:8px; letter-spacing:.05em; margin-top:-5px; }
.brand-name { font-size:16px; font-weight:800; letter-spacing:.025em; }.brand-name>span { color:var(--teal); }.brand-name small { display:block; font-size:8px; color:var(--muted); letter-spacing:.15em; margin-top:4px; }
.top-center { color:var(--muted); font-size:9px; letter-spacing:.11em; font-weight:700; }.top-center b { color:var(--signal); padding:0 6px; }.live-dot,.rail-dot { display:inline-block; width:7px; height:7px; border-radius:50%; background:#54a481; margin-right:8px; box-shadow:0 0 0 3px rgba(84,164,129,.12); }
.top-actions { display:flex; justify-content:flex-end; align-items:center; gap:14px; }.site-revision { font-size:9px; letter-spacing:.1em; font-weight:700; color:var(--muted); }.icon-button { border:1px solid var(--line); border-radius:50%; width:34px; height:34px; background:transparent; cursor:pointer; color:var(--ink); font-size:17px; }.icon-button:hover { border-color:var(--teal); color:var(--teal); }.menu-button { display:none; }
.workspace { display:grid; grid-template-columns:292px minmax(0,1fr); max-width:1660px; margin:0 auto; min-height:calc(100vh - 72px); }
.sidebar { padding:24px 15px 18px 23px; background:var(--paper); position:sticky; top:72px; height:calc(100vh - 72px); overflow-y:auto; scrollbar-width:thin; scrollbar-color:var(--line) transparent; }
.sidebar-head,.nav-group-label { display:flex; justify-content:space-between; padding:0 8px; font-size:9px; letter-spacing:.14em; font-weight:800; color:var(--muted); }.sidebar-head { margin-bottom:15px; }.sidebar-head span:last-child { opacity:.6; }
.home-link,.chapter-link { display:flex; align-items:center; width:100%; border:0; background:transparent; cursor:pointer; text-align:left; border-radius:6px; }.home-link { gap:12px; padding:9px 10px; margin-bottom:21px; font-size:12px; font-weight:700; }.home-link small { display:block; font-size:10px; color:var(--muted); font-weight:400; margin-top:2px; }.home-icon { width:22px; height:22px; display:grid; place-items:center; color:var(--teal); font-size:18px; }.home-link.selected { background:var(--soft); color:var(--teal); }
.nav-group { margin-bottom:18px; }.nav-group-label { padding-bottom:7px; font-size:8px; text-transform:uppercase; letter-spacing:.115em; }.chapter-link { min-height:30px; padding:4px 7px; gap:8px; font-size:10px; color:var(--muted); line-height:1.3; }.chapter-link:hover,.chapter-link.selected { background:var(--soft); color:var(--ink); }.chapter-link.selected { box-shadow:inset 2px 0 var(--signal); }.chapter-number { width:20px; flex:0 0 20px; color:var(--teal); font-size:9px; font-weight:800; font-variant-numeric:tabular-nums; }.chapter-link-title { flex:1; }.done-dot { color:#55a582; font-size:10px; }.sidebar-foot { border-top:1px solid var(--line); margin:22px 7px 0; padding:13px 0; display:grid; gap:5px; font-size:7px; letter-spacing:.09em; color:var(--muted); }
.main-column { min-width:0; }.search-row { height:63px; padding:0 38px; display:flex; justify-content:space-between; align-items:center; border-bottom:1px solid var(--line); }.searchbox { height:36px; width:min(470px,68%); display:flex; align-items:center; gap:9px; border:1px solid var(--line); border-radius:5px; background:var(--card); padding:0 10px; }.searchbox:focus-within { border-color:var(--teal); box-shadow:0 0 0 2px rgba(40,102,94,.1); }.search-icon { color:var(--teal); font-size:23px; transform:rotate(-20deg); line-height:1; }.searchbox input { border:0; outline:none; min-width:0; flex:1; color:var(--ink); background:transparent; font-size:11px; }.searchbox input::placeholder { color:#98a3a2; }.searchbox kbd { font-family:inherit; color:var(--muted); border:1px solid var(--line); padding:3px 5px; border-radius:3px; font-size:8px; }.search-count { font-size:8px; letter-spacing:.11em; color:var(--muted); font-weight:700; }.search-count b { color:var(--signal); padding:0 3px; }
.reading-area { max-width:970px; margin:0 auto; padding:34px 40px 60px; }.hero { min-height:389px; display:grid; grid-template-columns:1.05fr .95fr; background:var(--navy); color:#f4f4ed; overflow:hidden; position:relative; border-radius:4px; box-shadow:var(--shadow); }.hero-copy { padding:36px 36px 27px; position:relative; z-index:2; }.eyebrow { color:var(--muted); font-size:9px; letter-spacing:.15em; font-weight:800; }.hero .eyebrow { color:#afc1bb; }.status-pill { display:inline-block; color:#192c2f; background:var(--signal); padding:5px 7px; border-radius:2px; margin-right:6px; font-size:8px; }.hero h1 { font:400 clamp(35px,4.4vw,58px)/1.04 Georgia,'Times New Roman',serif; letter-spacing:-.045em; margin:32px 0 18px; }.hero h1 em { color:#c5d8cc; font-weight:400; }.hero-copy>p { max-width:390px; color:#c1cbc5; font-size:12px; line-height:1.75; margin:0; }.hero-buttons { margin-top:22px; display:flex; align-items:center; gap:20px; }.primary-button { border:0; background:var(--signal); color:#1c2929; font-size:10px; font-weight:800; border-radius:3px; padding:12px 14px; cursor:pointer; }.primary-button span { margin-left:15px; }.text-button { background:transparent; border:0; color:#e5eee7; font-size:10px; cursor:pointer; }.text-button span { color:var(--signal); margin-left:5px; }.hero-meta { display:flex; gap:20px; margin-top:25px; color:#93a7a1; font-size:8px; letter-spacing:.08em; text-transform:uppercase; }.hero-meta b { color:#fff; font-size:15px; display:block; letter-spacing:0; margin-bottom:2px; }
.hero-visual { position:relative; background:radial-gradient(ellipse at 55% 42%,#265058 0%,#14373e 43%,#0e292f 77%); display:flex; flex-direction:column; justify-content:center; padding:45px 24px 36px; overflow:hidden; }.hero-visual:before { content:""; position:absolute; width:370px; height:370px; border:1px solid rgba(194,221,210,.09); border-radius:50%; left:4%; top:7%; box-shadow:0 0 0 35px rgba(194,221,210,.025),0 0 0 75px rgba(194,221,210,.02); }.visual-caption,.visual-footer { position:absolute; left:23px; right:23px; top:20px; display:flex; justify-content:space-between; color:#b5cbc1; font-size:7px; letter-spacing:.16em; font-weight:700; }.visual-caption i { color:#718b85; font-style:normal; }.screen { position:relative; margin:auto; width:min(100%,340px); border:5px solid #18282c; border-radius:4px; background:#15262b; box-shadow:0 20px 45px rgba(0,0,0,.4); overflow:hidden; transform:perspective(700px) rotateY(-4deg); }.screen-top,.screen-bottom { display:flex; justify-content:space-around; align-items:center; height:27px; background:#1c3237; color:#9aafa8; font-size:7px; letter-spacing:.07em; }.screen-top b { color:#e7bd69; font-size:10px; }.attitude { height:200px; overflow:hidden; background:linear-gradient(#486e73 0 45%,#c9ac75 46% 48%,#5d6757 49% 100%); position:relative; }.attitude:before,.attitude:after { content:""; position:absolute; border:1px solid rgba(238,236,215,.22); border-radius:50%; width:260px; height:260px; left:calc(50% - 130px); top:calc(50% - 130px); }.attitude:after { width:360px; height:360px; left:calc(50% - 180px); top:calc(50% - 180px); }.horizon { position:absolute; left:-20%; right:-20%; height:1px; top:47%; background:#ddc588; box-shadow:0 0 12px #dfcb9e; }.pitch { position:absolute; left:36%; width:28%; border-top:1px solid rgba(240,239,214,.55); }.pitch-one { top:39%; }.pitch-two { top:56%; }.flight-director { position:absolute; top:44%; left:38%; width:24%; height:30px; border-top:2px solid #e8bd68; transform:rotate(-5deg); }.flight-director i { position:absolute; height:16px; border-left:2px solid #e8bd68; left:50%; }.flight-director i:last-child { left:auto; right:0; }.aircraft-symbol { position:absolute; color:#e8bd68; left:calc(50% - 8px); top:44%; font-size:17px; }.screen-label { position:absolute; top:10px; color:#d9dbb5; font-size:8px; letter-spacing:.14em; }.left-label { left:12px; }.right-label { right:12px; }.screen-bottom { color:#d3bc81; }.visual-footer { top:auto; bottom:16px; font-size:7px; color:#91aaa2; }.visual-footer b { color:#e2c17b; }.visual-footer i { color:#6d9288; font-style:normal; }.visual-coordinates { position:absolute; right:25px; bottom:57px; color:#648079; font-size:7px; line-height:1.6; text-align:right; letter-spacing:.08em; }
.source-note { display:flex; align-items:flex-start; gap:13px; padding:16px 18px; border:1px solid var(--line); border-top:0; background:var(--card); }.note-icon { display:grid; place-items:center; flex:0 0 20px; width:20px; height:20px; border:1px solid #9ab6aa; border-radius:50%; color:var(--teal); font:italic 14px Georgia; }.source-note p { flex:1; margin:0; color:var(--muted); font-size:10px; line-height:1.65; }.source-note p b { color:var(--ink); }.note-date { font-size:7px; letter-spacing:.1em; color:var(--muted); line-height:1.6; text-align:right; white-space:nowrap; }.note-date b { color:var(--teal); }
.path-section,.chapters-section { margin-top:52px; }.section-title { display:flex; justify-content:space-between; align-items:end; margin-bottom:18px; }.section-title h2 { margin:8px 0 0; font:400 27px/1.15 Georgia,'Times New Roman',serif; letter-spacing:-.025em; }.section-title>span { font-size:8px; color:var(--muted); letter-spacing:.13em; padding-bottom:4px; }.path-grid { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; }.path-card { position:relative; text-align:left; min-height:155px; padding:16px 15px 13px; background:var(--card); border:1px solid var(--line); border-radius:3px; cursor:pointer; transition:transform .18s,border-color .18s,box-shadow .18s; }.path-card:hover { transform:translateY(-2px); border-color:#8baca1; box-shadow:var(--shadow); }.path-index { color:var(--teal); font:italic 11px Georgia; }.path-arrow { position:absolute; top:14px; right:15px; color:#8aa29a; }.path-card h3 { font:400 16px Georgia,'Times New Roman',serif; margin:16px 0 7px; }.path-card p { margin:0; color:var(--muted); font-size:9px; line-height:1.55; min-height:30px; }.path-range { display:block; border-top:1px solid var(--line); margin-top:11px; padding-top:8px; font-size:7px; letter-spacing:.12em; color:var(--teal); font-weight:800; }
.principle-band { margin-top:46px; padding:21px 23px; border-radius:3px; background:#e8eee9; color:#203a3b; display:grid; grid-template-columns:1.2fr 1fr; align-items:center; gap:22px; }.dark .principle-band { background:#203538; color:#e4eeea; }.principle-band>div { display:flex; align-items:center; flex-wrap:wrap; gap:9px; }.principle-band>div>span { width:100%; color:var(--teal); font-size:8px; font-weight:800; letter-spacing:.14em; margin-bottom:3px; }.principle-band strong { font:400 19px Georgia; }.principle-band i { font-style:normal; color:#c79e4e; }.principle-band p { margin:0; color:var(--muted); font-size:10px; line-height:1.65; }
.chapter-shelf { margin:22px 0 25px; }.shelf-title { border-bottom:1px solid var(--line); padding:0 0 8px; font-size:12px; font-weight:700; display:flex; justify-content:space-between; }.shelf-title span { color:var(--muted); font-size:8px; letter-spacing:.1em; text-transform:uppercase; font-weight:500; }.shelf-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:0 20px; }.shelf-grid button { display:grid; grid-template-columns:27px 1fr; grid-template-rows:auto auto; align-items:center; text-align:left; background:none; border:0; border-bottom:1px solid var(--line); min-height:51px; padding:7px 3px; cursor:pointer; }.shelf-grid button:hover b { color:var(--teal); }.shelf-grid button>span { grid-row:1/3; color:var(--teal); font-size:9px; font-weight:800; }.shelf-grid b { font-size:10px; font-weight:600; line-height:1.35; }.shelf-grid i { color:var(--muted); font-size:8px; font-style:normal; margin-top:3px; }
.site-footer { display:flex; justify-content:space-between; gap:10px; padding:18px 0; margin-top:32px; border-top:1px solid var(--line); font-size:7px; letter-spacing:.1em; color:var(--muted); }.site-footer b { color:var(--signal); padding:0 3px; }
.guide-reading { max-width:830px; padding-top:28px; }.crumb { display:flex; gap:9px; color:var(--muted); font-size:9px; align-items:center; margin-bottom:32px; }.crumb button { border:0; background:none; color:var(--teal); padding:0; cursor:pointer; font-size:9px; }.crumb b { color:var(--ink); font-size:8px; letter-spacing:.06em; }.article-heading { border-bottom:1px solid var(--line); padding-bottom:17px; }.article-heading .eyebrow { display:flex; gap:9px; align-items:center; }.article-heading .eyebrow span { color:var(--teal); }.article-heading .eyebrow i { color:var(--signal); font-style:normal; }.article-heading h1,.search-heading { font:400 clamp(31px,4vw,45px)/1.1 Georgia,'Times New Roman',serif; letter-spacing:-.035em; margin:15px 0 10px; }.lede { margin:0; max-width:660px; color:var(--muted); font-size:11px; line-height:1.7; }.article-actions { display:flex; align-items:center; justify-content:space-between; margin-top:19px; color:var(--muted); font-size:8px; letter-spacing:.1em; }.read-toggle { display:flex; align-items:center; gap:7px; cursor:pointer; color:var(--teal); font-size:9px; letter-spacing:0; }.read-toggle input { accent-color:var(--teal); }.page-card { background:var(--card); border:1px solid var(--line); border-radius:3px; padding:22px 25px 0; margin-top:20px; box-shadow:0 8px 24px rgba(20,42,44,.035); }.page-card-top,.page-card-bottom { display:flex; justify-content:space-between; align-items:center; color:var(--muted); font-size:7px; letter-spacing:.12em; }.page-card-top span:first-child { color:var(--teal); font-weight:800; }.page-card h2 { font:400 25px/1.2 Georgia,'Times New Roman',serif; margin:17px 0 20px; }.source-text { white-space:pre-wrap; overflow-wrap:anywhere; color:var(--ink); font-size:12px; line-height:1.75; max-width:710px; }.page-card-bottom { border-top:1px solid var(--line); padding:12px 0; margin-top:24px; font-size:7px; }.page-card-bottom a { color:var(--teal); text-decoration:none; letter-spacing:0; }.page-navigation { display:grid; grid-template-columns:1fr 1fr; gap:10px; margin:14px 0 0; }.page-navigation button { display:flex; flex-direction:column; gap:7px; background:var(--card); border:1px solid var(--line); padding:12px 13px; text-align:left; cursor:pointer; min-height:63px; }.page-navigation button:last-child { text-align:right; align-items:flex-end; }.page-navigation button:disabled { opacity:.5; cursor:default; }.page-navigation button span { color:var(--teal); font-size:7px; letter-spacing:.11em; font-weight:800; }.page-navigation button b { font-size:10px; font-weight:500; }.chapter-switch { display:flex; justify-content:space-between; margin-top:22px; }.chapter-switch button { border:0; background:none; color:var(--teal); cursor:pointer; font-size:9px; }.reading-footer { border-top:1px solid var(--line); margin-top:30px; padding-top:14px; color:var(--muted); font-size:9px; line-height:1.6; }
.search-heading { margin:13px 0 8px; }.search-heading em { color:var(--teal); font-weight:400; }.results-list { margin-top:24px; border-top:1px solid var(--line); }.result-card { display:block; width:100%; text-align:left; padding:17px 12px; border:0; border-bottom:1px solid var(--line); background:transparent; cursor:pointer; }.result-card:hover { background:var(--card); }.result-kicker { display:block; color:var(--teal); font-size:7px; font-weight:800; letter-spacing:.12em; }.result-kicker b { color:var(--signal); padding:0 4px; }.result-card strong { display:block; font:400 18px Georgia; margin:8px 0 4px; }.result-card>span:nth-of-type(2) { color:var(--muted); font-size:9px; }.result-card p { color:var(--muted); font-size:10px; line-height:1.6; margin:9px 0 0; }.empty-state { padding:32px; color:var(--muted); text-align:center; border-bottom:1px solid var(--line); }.empty-state span { color:var(--teal); font-size:9px; font-weight:800; letter-spacing:.13em; }.empty-state p { font-size:11px; }.overview .site-footer { margin-top:36px; }
@media(max-width:1190px) { .workspace { grid-template-columns:218px minmax(0,1fr); }.reading-area { max-width:980px; } }
@media(max-width:760px) { .topbar { height:61px; padding:0 15px; grid-template-columns:1fr auto; }.top-center { display:none; }.top-actions { gap:8px; }.site-revision { font-size:8px; }.menu-button { display:block; }.workspace { display:block; min-height:calc(100vh - 61px); }.sidebar { position:fixed; z-index:19; top:61px; bottom:0; left:0; height:auto; width:min(300px,88vw); transform:translateX(-102%); transition:transform .2s; box-shadow:var(--shadow); background:var(--paper); }.sidebar-open { transform:translateX(0); }.search-row { height:56px; padding:0 14px; }.searchbox { width:100%; }.search-count { display:none; }.reading-area { padding:18px 14px 40px; }.hero { grid-template-columns:1fr; }.hero-copy { padding:27px 23px 24px; }.hero h1 { font-size:43px; margin:25px 0 14px; }.hero-visual { min-height:265px; padding:34px 20px; }.attitude { height:145px; }.hero-meta { margin-top:21px; }.source-note { padding:13px; }.note-date { display:none; }.path-section,.chapters-section { margin-top:36px; }.section-title h2 { font-size:23px; }.path-grid { grid-template-columns:repeat(2,minmax(0,1fr)); gap:8px; }.path-card { min-height:158px; padding:13px 11px 10px; }.path-card h3 { font-size:15px; }.principle-band { grid-template-columns:1fr; gap:12px; margin-top:32px; padding:17px; }.shelf-grid { grid-template-columns:1fr; }.site-footer { flex-direction:column; }.guide-reading { padding-top:20px; }.crumb { margin-bottom:24px; }.article-heading h1 { font-size:34px; }.page-card { padding:17px 15px 0; }.page-card h2 { font-size:21px; }.source-text { font-size:11px; line-height:1.72; }.article-actions { gap:8px; align-items:flex-start; }.article-actions>span { text-align:right; font-size:7px; }.page-navigation { gap:6px; }.page-navigation button { padding:10px; }.result-card { padding:14px 8px; } }
@media(max-width:390px) { .brand-name { font-size:14px; }.brand-mark { width:35px; height:35px; }.site-revision { display:none; }.hero h1 { font-size:37px; }.path-grid { grid-template-columns:1fr; }.path-card { min-height:130px; } }

.original-page-card { padding-bottom:24px; }
.page-card-top a { color:var(--teal); text-decoration:none; font-size:8px; letter-spacing:0; }
.figure-list { display:grid; gap:18px; margin-top:24px; }
.guide-figure { margin:0; padding:14px; border:1px solid var(--line); background:var(--paper); }
.guide-figure img { display:block; width:auto; max-width:100%; height:auto; max-height:760px; margin:0 auto; object-fit:contain; }
.guide-figure figcaption { max-width:740px; margin:11px auto 0; color:var(--muted); font-size:10px; line-height:1.55; text-align:left; }
.guide-figure figcaption b { color:var(--teal); letter-spacing:.08em; margin-right:6px; }

/* Larger reading type and a quiet, fully scrollable chapter index. */
body { font-size:16px; }
.workspace { grid-template-columns:292px minmax(0,1fr); }
.sidebar { padding:24px 16px 20px 19px; overflow-y:auto; scrollbar-width:none; -ms-overflow-style:none; }
.sidebar::-webkit-scrollbar { display:none; width:0; height:0; }
.sidebar-head { font-size:11px; padding:0 8px; margin-bottom:17px; }
.nav-group { margin-bottom:23px; }
.nav-group-label { font-size:11px; padding-bottom:9px; letter-spacing:.09em; }
.home-link { font-size:17px; padding:11px 10px; gap:12px; }
.home-link small { font-size:14px; }
.chapter-link { min-height:44px; padding:9px 8px; gap:11px; font-size:16px; line-height:1.35; align-items:flex-start; position:relative; }
.chapter-link-title { padding-right:17px; }
.chapter-number { width:26px; flex:0 0 26px; font-size:12px; margin-top:3px; }
.chapter-link:hover,.chapter-link.selected,.home-link.selected { background:transparent; color:var(--ink); box-shadow:none; }
.chapter-link.selected::after,.home-link.selected::after,.topic-link.selected::after { content:""; position:absolute; inset-inline-end:7px; top:50%; width:9px; height:9px; transform:translateY(-50%); border-radius:50%; background:var(--signal); }
.home-link { position:relative; padding-right:25px; }
.topic-list { display:grid; gap:2px; padding:2px 0 3px 31px; }
.topic-link { position:relative; display:grid; grid-template-columns:minmax(0,1fr) auto; align-items:start; gap:6px; width:100%; border:0; border-radius:5px; padding:8px 18px 8px 8px; background:transparent; color:var(--muted); cursor:pointer; text-align:left; font-size:14px; line-height:1.35; }
.topic-link:hover,.topic-link.selected { background:transparent; color:var(--ink); }
.topic-link.selected::after { width:8px; height:8px; inset-inline-end:4px; }
.topic-link small { color:var(--muted); font-size:11px; white-space:nowrap; padding-top:2px; }
.chapter-link:focus-visible,.topic-link:focus-visible,.home-link:focus-visible { outline:2px solid var(--teal); outline-offset:1px; }
.reading-area { font-size:16px; }
.article-heading h1,.search-heading { font-size:clamp(34px,4.2vw,50px); }
.lede { font-size:17px; line-height:1.7; }
.crumb { font-size:13px; }
.crumb button { font-size:13px; }
.crumb b { font-size:11px; }
.page-card { padding-top:26px; }
.page-card h2 { font-size:30px; margin:19px 0 23px; }
.source-content { max-width:790px; color:var(--ink); }
.source-content p { margin:0 0 1.05em; font-size:17px; line-height:1.82; overflow-wrap:anywhere; }
.source-content p:last-child { margin-bottom:0; }
.guide-figure figcaption { font-size:14px; line-height:1.6; }
.page-card-top,.page-card-bottom { font-size:10px; }
.page-navigation button span { font-size:10px; }
.page-navigation button b { font-size:14px; }
.read-toggle { font-size:14px; }
.article-actions { font-size:11px; }
.topic-index { margin-top:25px; border-top:1px solid var(--line); }
.topic-index-heading { padding:18px 0 10px; color:var(--teal); text-transform:uppercase; font-size:12px; font-weight:800; letter-spacing:.1em; }
.topic-index-item { display:grid; grid-template-columns:34px minmax(0,1fr) auto; gap:12px; align-items:baseline; width:100%; padding:13px 12px; border:0; border-bottom:1px solid var(--line); background:transparent; color:var(--ink); text-align:left; cursor:pointer; font-size:17px; line-height:1.5; }
.topic-index-item:hover { background:var(--soft); }
.topic-index-number { color:var(--teal); font-size:13px; font-weight:800; }
.topic-index-item small { color:var(--muted); font-size:12px; white-space:nowrap; }
.index-figures { max-width:790px; margin-top:25px; }
.chapter-switch button { font-size:14px; }
.search-heading { margin-top:18px; }
.result-kicker { font-size:11px; }
.result-card strong { font-size:21px; }
.result-card>span:nth-of-type(2) { font-size:14px; }
.result-card p { font-size:15px; line-height:1.7; }
.empty-state p { font-size:15px; }
@media(max-width:1190px) { .workspace { grid-template-columns:270px minmax(0,1fr); } }
@media(max-width:760px) {
  .sidebar { width:min(340px,90vw); }
  .chapter-link { font-size:16px; }
  .topic-link { font-size:14px; }
  .source-content p { font-size:16px; line-height:1.75; }
  .topic-index-item { grid-template-columns:28px minmax(0,1fr) auto; font-size:16px; padding:12px 6px; gap:8px; }
  .topic-index-item small { font-size:11px; }
  .article-actions { font-size:10px; }
  .page-navigation button b { font-size:13px; }
}

/* Clearer navigation and continuous, readable guide prose. */
.sidebar-head { font-size:12px; }
.nav-group-label { font-size:12px; }
.home-link { font-size:19px; }
.home-link small { font-size:15px; }
.chapter-link { font-size:18px; line-height:1.4; }
.topic-link { font-size:16px; line-height:1.45; }
.topic-link small { font-size:12px; }
.article-heading h1,.search-heading { font-size:clamp(36px,4.5vw,52px); }
.source-content p { font-size:18px; line-height:1.82; }
.source-content .procedure-step { display:grid; grid-template-columns:34px minmax(0,1fr); gap:9px; margin:0 0 1.05em; }
.procedure-step>b { color:var(--teal); font-size:15px; line-height:1.82; font-variant-numeric:tabular-nums; }
.procedure-step>span { min-width:0; }
.source-content .procedure-meta { display:flex; flex-wrap:wrap; align-items:baseline; gap:7px 12px; padding-bottom:12px; margin:0 0 1em; border-bottom:1px solid var(--line); }
.procedure-meta>span { color:var(--teal); font-size:12px; font-weight:800; letter-spacing:.08em; }
.procedure-meta>b { font-size:15px; font-weight:600; }
.topic-index-item { font-size:18px; }
.page-card { background:var(--paper); }
.topic-link { display:block; }
.topic-index-item { grid-template-columns:34px minmax(0,1fr); }
.shelf-grid button { grid-template-rows:auto; min-height:48px; }
.shelf-grid button>span { grid-row:auto; }
.source-content h2.article-subheading { margin:1.8em 0 .6em; color:var(--ink); font:400 25px/1.25 Georgia,'Times New Roman',serif; }
@media(max-width:760px) {
  .chapter-link { font-size:17px; }
  .topic-link { font-size:16px; }
  .source-content p { font-size:17px; line-height:1.78; }
  .topic-index-item { grid-template-columns:28px minmax(0,1fr); font-size:17px; }
}

/* Readable type for the landing overview. */
.overview .eyebrow { font-size:12px; }
.overview .status-pill { font-size:10px; }
.overview .hero-copy>p { max-width:430px; font-size:16px; line-height:1.72; }
.overview .primary-button,.overview .text-button { font-size:14px; }
.overview .hero-meta { font-size:11px; line-height:1.5; }
.overview .hero-meta b { font-size:17px; }
.overview .source-note p { font-size:15px; line-height:1.7; }
.overview .note-date { font-size:10px; }
.overview .section-title h2 { font-size:30px; }
.overview .section-title>span { font-size:11px; }
.overview .path-card h3 { font-size:18px; }
.overview .path-card p { font-size:14px; line-height:1.6; min-height:0; }
.overview .path-range { font-size:10px; }
.overview .principle-band>div>span { font-size:11px; }
.overview .principle-band p { font-size:15px; line-height:1.7; }
.overview .shelf-title { font-size:15px; }
.overview .shelf-title span { font-size:11px; }
.overview .shelf-grid button>span { font-size:12px; }
.overview .shelf-grid b { font-size:14px; line-height:1.45; }
.overview .shelf-grid i { font-size:11px; }
.overview .site-footer { font-size:10px; line-height:1.5; }
@media(max-width:760px) {
  .overview .hero-copy>p { font-size:16px; }
  .overview .hero-meta { gap:12px; font-size:10px; }
  .overview .hero-meta b { font-size:15px; }
  .overview .source-note p { font-size:15px; }
  .overview .section-title h2 { font-size:26px; }
  .overview .path-card p { font-size:14px; }
  .overview .principle-band p { font-size:15px; }
  .overview .shelf-grid b { font-size:14px; }
  .overview .site-footer { font-size:10px; }
}

.sidebar { border-right:0; background:var(--paper); }
.main-column { background:var(--paper); }
.page-card { border:0; box-shadow:none; background:transparent; }
.original-page-card { padding-bottom:24px; }
.guide-figure { border:0; background:transparent; padding:0; }
.page-navigation button { border:0; background:transparent; }
.topic-index-item:hover { background:transparent; color:var(--teal); }
body,.site-shell,.workspace,.topbar,.search-row,.reading-area { background-color:var(--paper); }
.topbar { border-bottom:0; }
.searchbox { background:transparent; }
.chapter-row { display:grid; grid-template-columns:minmax(0,1fr) 40px; align-items:start; }
.chapter-toggle { display:grid; place-items:center; width:40px; height:44px; padding:0; border:0; border-radius:5px; background:transparent; color:var(--muted); font-size:23px; line-height:1; cursor:pointer; }
.chapter-toggle:hover,.chapter-toggle.is-expanded { background:var(--soft); color:var(--teal); }
.chapter-toggle:focus-visible { outline:2px solid var(--teal); outline-offset:1px; }
.topic-list[hidden] { display:none !important; }
.history-cover { max-width:790px; margin:24px 0 30px; }
.history-cover .guide-figure img { max-height:470px; }
.history-table-wrap { max-width:100%; margin:22px 0 27px; overflow-x:auto; }
.history-table { width:100%; min-width:620px; border-collapse:collapse; color:var(--ink); font-size:15px; line-height:1.5; }
.history-table th,.history-table td { padding:11px 10px; border:0; border-bottom:1px solid var(--line); background:transparent; text-align:left; vertical-align:top; }
.history-table thead th { border-bottom:2px solid var(--teal); font-weight:700; }
.history-table td:first-child { font-weight:700; }
.article-heading .eyebrow { margin-bottom:8px; }
@media(max-width:760px) { .history-table { font-size:13px; } }