/* Northern Preserve / Institutional Design System v2 */
:root{
  color-scheme:dark;
  --bg:#0b1219;--surface:#101c25;--surface-2:#14222c;--text:#f0f2ef;--muted:#adbcc2;--quiet:#95a8b3;--line:#32414c;--accent:#b5cec5;--accent-strong:#d0e4d9;--note:#9dc0ba;--panel:#0e1821;--card-hover:#192a33;--hero-glow:rgba(147,190,173,.075);--graph-grid:rgba(174,201,197,.22);--shadow:rgba(0,0,0,.12);
  --width:1320px;
}
:root[data-theme="light"]{
  color-scheme:light;
  --bg:#f5f4ef;--surface:#eaece8;--surface-2:#e4eae6;--text:#20313a;--muted:#465c66;--quiet:#546973;--line:#b6c3c2;--accent:#365b60;--accent-strong:#284f51;--note:#2e6765;--panel:#eef0eb;--card-hover:#dbe6e1;--hero-glow:rgba(93,142,138,.09);--graph-grid:rgba(42,82,80,.24);--shadow:rgba(24,51,53,.07);
}
@media(prefers-color-scheme:light){
  :root:not([data-theme]){color-scheme:light;--bg:#f5f4ef;--surface:#eaece8;--surface-2:#e4eae6;--text:#20313a;--muted:#465c66;--quiet:#546973;--line:#b6c3c2;--accent:#365b60;--accent-strong:#284f51;--note:#2e6765;--panel:#eef0eb;--card-hover:#dbe6e1;--hero-glow:rgba(93,142,138,.09);--graph-grid:rgba(42,82,80,.24);--shadow:rgba(24,51,53,.07)}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:95px}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;font-size:16px;-webkit-font-smoothing:antialiased;transition:background-color .28s ease,color .28s ease}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
a:focus-visible,button:focus-visible{outline:2px solid var(--accent-strong);outline-offset:5px}
::selection{background:var(--accent);color:var(--bg)}
.container{width:min(calc(100% - 112px),var(--width));margin-inline:auto}
.sr-only{position:absolute!important;width:1px!important;height:1px!important;padding:0!important;margin:-1px!important;overflow:hidden!important;clip:rect(0,0,0,0)!important;white-space:nowrap!important;border:0!important}
.skip{position:absolute;left:12px;top:-80px;z-index:200;padding:11px 16px;background:var(--text);color:var(--bg)}
.skip:focus{top:12px}
.site-header{position:sticky;top:0;z-index:40;min-height:88px;border-bottom:1px solid var(--line);background:var(--bg)}
.header-inner{min-height:88px;display:flex;align-items:center;gap:32px}
.brand{display:inline-flex;align-items:center;gap:12px;min-width:212px}
.brand-symbol{width:42px;height:42px;overflow:visible;fill:none;stroke:var(--accent);stroke-width:1.3}
.symbol-n{stroke:var(--text);stroke-width:3.25;stroke-linejoin:round;stroke-linecap:square;stroke-dasharray:95;stroke-dashoffset:95;animation:mark-trace 1.25s cubic-bezier(.2,.8,.2,1) .12s forwards}
.symbol-cross{stroke-width:1.25;opacity:.7}
.symbol-ring{stroke-width:.85;opacity:.57;transform-origin:30px 30px;animation:mark-ring .8s ease-out both}
.brand-type{display:flex;flex-direction:column;gap:4px;line-height:1}
.brand-type strong{font-size:14px;letter-spacing:.25em;font-weight:680}
.brand-type small{font-size:9px;letter-spacing:.31em;color:var(--quiet);font-weight:600}
.nav{display:flex;align-items:center;gap:38px;margin-left:auto}
.nav a{color:var(--muted);font-size:13px;transition:color .2s}
.nav a:hover,.nav a:focus-visible{color:var(--text)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:17px}
.theme-switch,.menu-switch{background:none;border:1px solid var(--line);border-radius:50%;width:39px;height:39px;display:grid;place-items:center;cursor:pointer;transition:background .2s,border-color .2s}
.theme-switch:hover,.menu-switch:hover{background:var(--surface-2);border-color:var(--quiet)}
.theme-switch svg{height:18px;width:18px;stroke:var(--text)}
.theme-switch .moon{display:none}
:root[data-theme="light"] .theme-switch .sun{display:none}
:root[data-theme="light"] .theme-switch .moon{display:block}
@media(prefers-color-scheme:light){:root:not([data-theme]) .theme-switch .sun{display:none}:root:not([data-theme]) .theme-switch .moon{display:block}}
.menu-switch{display:none;border-radius:6px}
.menu-switch span{height:1.5px;width:17px;background:var(--text);display:block;transition:transform .2s}
.menu-switch{align-content:center;gap:5px}
.menu-switch[aria-expanded="true"] span:first-child{transform:translateY(3.25px) rotate(45deg)}
.menu-switch[aria-expanded="true"] span:last-child{transform:translateY(-3.25px) rotate(-45deg)}
.hero{padding-top:37px}
.hero-kicker,.hero-tail{display:flex;justify-content:space-between;align-items:center}
.hero-kicker{padding:4px 0 20px;color:var(--quiet);font-size:10px;letter-spacing:.18em}
.hero-index{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.hero-grid{min-height:662px;display:grid;grid-template-columns:1.12fr 1fr;gap:30px;align-items:center}
.hero-content{padding:20px 0 65px;position:relative;z-index:1}
.hero-prelude,.section-eyebrow{font-size:11px;letter-spacing:.23em;color:var(--note);font-weight:650;margin:0 0 32px}
.hero h1{font-family:Georgia,"Times New Roman",serif;font-size:clamp(69px,7vw,115px);font-weight:400;letter-spacing:-.067em;line-height:1.02;margin:0 0 33px;white-space:nowrap}
.hero h1 em,.section h2 em,.closing h2 em{font-weight:400;color:var(--accent);font-style:italic}
.hero-description{max-width:535px;color:var(--muted);line-height:1.85;font-size:17px;margin:0 0 35px}
.arrow-link{display:inline-flex;gap:23px;align-items:center;font-size:13px;font-weight:620;padding-bottom:11px;border-bottom:1px solid var(--quiet);transition:gap .25s,border-color .25s}
.arrow-link:hover{gap:31px;border-color:var(--text)}
.arrow-link svg{width:18px;height:18px}
.hero-figure{min-width:0;max-width:610px;justify-self:end;width:100%;position:relative;display:flex;flex-direction:column}
.hero-figure:before{content:"";position:absolute;left:15%;top:8%;width:70%;height:72%;border-radius:100%;background:var(--hero-glow);filter:blur(50px);pointer-events:none}
.bearing-diagram{display:block;width:100%;height:auto;overflow:visible;color:var(--quiet);position:relative}
.bearing-diagram .orbit{stroke:var(--graph-grid);fill:none;stroke-width:1}
.bearing-diagram .orbit-middle{stroke-dasharray:3 8;stroke-width:1.2}
.bearing-diagram .orbit-inner{stroke-width:.9}
.bearing-diagram .axis{stroke:var(--graph-grid);stroke-width:.7;opacity:.75}
.bearing-diagram .diagonal{stroke:var(--graph-grid);stroke-width:.7;opacity:.65}
.bearing-diagram .needle{fill:none;stroke:var(--accent);stroke-width:1.45;opacity:.92;transform-origin:275px 275px;animation:needle-reveal 1.25s cubic-bezier(.2,.75,.2,1) both}
.bearing-diagram .needle-core{fill:var(--bg);stroke:var(--accent);stroke-width:1.5}
.bearing-diagram .needle-center{fill:var(--accent)}
.bearing-diagram .research-curve{fill:none;stroke:url(#orbit-grad);stroke-width:2;stroke-dasharray:700;stroke-dashoffset:700;animation:path-reveal 1.6s ease .4s forwards}
.diagram-dots circle{fill:var(--accent);opacity:.8}
.diagram-dots circle:last-child{stroke:var(--bg);stroke-width:2}
.diagram-labels{fill:var(--quiet);font-size:9px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.6px}
.figure-caption{display:flex;justify-content:space-between;gap:10px;font-size:10px;letter-spacing:.05em;color:var(--quiet);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.hero-tail{border-top:1px solid var(--line);padding:23px 0 26px;color:var(--quiet);font-size:10px;letter-spacing:.15em}
.hero-tail a{display:flex;gap:12px;align-items:center;transition:color .2s}
.hero-tail a:hover{color:var(--text)}
.hero-tail a span{font-size:17px;line-height:1}
.section{border-top:1px solid var(--line);padding:124px 0 125px}
.section-columns{display:grid;grid-template-columns:31% minmax(0,1fr);gap:30px}
.section-number{display:flex;gap:23px;align-items:flex-start;color:var(--quiet);font-size:11px;letter-spacing:.14em;padding-top:9px}
.section-number span:first-child{font-family:ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--accent)}
.section-body{max-width:895px}
.section h2,.closing h2{font-family:Georgia,"Times New Roman",serif;font-weight:400;font-size:clamp(48px,5.8vw,80px);line-height:1.1;letter-spacing:-.052em;margin:0 0 42px}
.section .section-eyebrow{margin-bottom:29px}
.statement .statement-bottom{display:grid;grid-template-columns:1fr 1fr;gap:52px}
.statement-bottom p{line-height:1.85;color:var(--muted);font-size:16px;margin:0}
.quote-rule{border-top:1px solid var(--line);margin-top:100px;padding-top:24px;display:flex;justify-content:space-between;gap:20px;font-size:10px;letter-spacing:.15em;color:var(--quiet)}
.section-heading{margin-bottom:76px}
.section-heading h2{margin-bottom:23px}
.section-heading .intro{max-width:605px;color:var(--muted);line-height:1.85;font-size:16px;margin:0}
.discipline-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.discipline-card{padding:31px 35px 34px;display:flex;flex-direction:column;min-height:475px;transition:background-color .25s}
.discipline-card:first-child{padding-left:0}
.discipline-card:last-child{padding-right:0}
.discipline-card+.discipline-card{border-left:1px solid var(--line)}
.discipline-card:hover{background:var(--hero-glow)}
.discipline-top{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:47px}
.discipline-id,.discipline-overline,.discipline-foot{font-size:10px;letter-spacing:.15em;color:var(--quiet);font-weight:550}
.discipline-top svg{width:79px;height:79px;color:var(--accent);fill:var(--accent)}
.discipline-overline{margin:0 0 20px;color:var(--note)}
.discipline-card h3{font-family:Georgia,"Times New Roman",serif;font-size:clamp(32px,3.2vw,46px);line-height:1.06;font-weight:400;letter-spacing:-.035em;margin:0 0 21px}
.discipline-card p:not(.discipline-overline){color:var(--muted);font-size:15px;line-height:1.8;margin:0 0 34px;max-width:340px}
.discipline-foot{margin-top:auto;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.09em}
.discipline-disclaimer{font-size:12px;line-height:1.8;color:var(--quiet);margin:23px 0 0;max-width:730px}
.method-workspace{display:grid;grid-template-columns:32% 1fr;border:1px solid var(--line);min-height:540px}
.method-controls{display:grid;grid-template-rows:repeat(4,1fr);background:var(--surface)}
.method-step{border:0;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:transparent;text-align:left;padding:31px 27px;font-size:12px;letter-spacing:.13em;display:flex;justify-content:space-between;gap:12px;align-items:center;cursor:pointer;color:var(--muted);transition:background .2s,color .2s}
.method-step:last-child{border-bottom:0}
.method-step:hover{background:var(--surface-2);color:var(--text)}
.method-step.active{background:var(--card-hover);color:var(--text);box-shadow:inset 3px 0 var(--accent)}
.method-step-arrow{color:var(--accent);font-size:19px;font-family:ui-sans-serif,sans-serif}
.method-display{background:var(--panel);min-width:0;display:flex;flex-direction:column;padding:25px 35px}
.method-display-top,.method-display-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--quiet);font-size:10px;letter-spacing:.12em;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.method-graphic{width:100%;height:auto;display:block;color:var(--quiet);max-height:250px}
.method-curve{fill:none;stroke:var(--accent);stroke-width:1.8;opacity:.75}
.method-dashed{stroke:var(--graph-grid);stroke-width:1;stroke-dasharray:3 8}
.method-node .node-halo{fill:var(--accent);opacity:0;transition:opacity .25s}
.method-node .node-ring{stroke:var(--quiet);fill:var(--panel);stroke-width:1.5;transition:stroke .25s}
.method-node .node-center{fill:var(--quiet);transition:fill .25s}
.method-node.active .node-halo{opacity:.13}
.method-node.active .node-ring{stroke:var(--accent-strong);stroke-width:2}
.method-node.active .node-center{fill:var(--accent-strong)}
.method-node text{fill:var(--quiet);font-size:12px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.method-node.active text{fill:var(--text)}
.method-explanation{max-width:650px;margin-top:-5px;min-height:136px}
.method-category{color:var(--note);font-size:10px;font-weight:650;letter-spacing:.15em;margin:0 0 12px}
.method-explanation h3{font-family:Georgia,"Times New Roman",serif;font-weight:400;letter-spacing:-.03em;font-size:clamp(30px,3.2vw,42px);margin:0 0 13px}
.method-explanation p:last-child{font-size:14px;line-height:1.75;color:var(--muted);margin:0}
.method-display-foot{border-top:1px solid var(--line);padding-top:16px;margin-top:auto}
.commitments .section-body h2{margin-bottom:60px}
.principle-rows{border-top:1px solid var(--line)}
.principle-row{display:grid;grid-template-columns:40px minmax(170px,.9fr) minmax(0,1fr);gap:26px;padding:29px 0;border-bottom:1px solid var(--line);align-items:start}
.principle-row>span{font-size:11px;color:var(--note);font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.principle-row h3{font-weight:540;font-size:17px;line-height:1.4;margin:0}
.principle-row p{color:var(--muted);font-size:14px;line-height:1.78;margin:0}
.closing{background:var(--surface);position:relative;overflow:hidden;border-top:1px solid var(--line)}
.closing-inner{padding:128px 0 128px;position:relative}
.closing h2{font-size:clamp(58px,7vw,105px);position:relative;z-index:1;margin:0 0 29px}
.closing p:not(.section-eyebrow){font-size:16px;max-width:520px;line-height:1.8;color:var(--muted);margin:0 0 37px;position:relative;z-index:1}
.closing .section-eyebrow{position:relative;z-index:1;margin-bottom:36px}
.closing .arrow-link{position:relative;z-index:1}
.closing-emblem{position:absolute;width:450px;height:450px;right:-40px;top:53px;fill:none;stroke:var(--accent);stroke-width:.55;opacity:.10;pointer-events:none}
.site-footer{border-top:1px solid var(--line)}
.footer-top{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:35px 0;border-bottom:1px solid var(--line)}
.footer-brand{font-size:15px;letter-spacing:.22em;font-weight:650}
.footer-brand span{font-size:10px;color:var(--quiet);margin-left:5px}
.footer-top>span,.footer-top>a:last-child{font-size:10px;letter-spacing:.12em;color:var(--quiet)}
.footer-top>a:last-child:hover{color:var(--text)}
.footer-bottom{display:flex;justify-content:space-between;align-items:start;gap:30px;padding:27px 0 35px;color:var(--quiet);font-size:11px;line-height:1.7}
.footer-bottom>span{white-space:nowrap}
.footer-bottom p{max-width:640px;text-align:right;margin:0}
@keyframes mark-trace{to{stroke-dashoffset:0}}
@keyframes mark-ring{from{opacity:0;transform:scale(.91)}to{opacity:.57;transform:scale(1)}}
@keyframes path-reveal{to{stroke-dashoffset:0}}
@keyframes needle-reveal{from{opacity:0;transform:scale(.93) rotate(-12deg)}to{opacity:.92;transform:scale(1) rotate(0)}}
@media(min-width:1600px){.hero-grid{min-height:705px}}
@media(max-width:1120px){
  .container{width:min(calc(100% - 72px),var(--width))}
  .hero h1{font-size:clamp(66px,7.7vw,90px)}
  .hero-grid{min-height:585px;gap:12px}
  .section-columns{grid-template-columns:26% minmax(0,1fr)}
  .discipline-card{padding-left:24px;padding-right:24px}
  .discipline-card h3{font-size:37px}
  .principle-row{grid-template-columns:30px 1fr;gap:14px 22px}
  .principle-row p{grid-column:2}
}
@media(max-width:760px){
  html{scroll-padding-top:75px}
  .container{width:calc(100% - 40px)}
  .site-header,.header-inner{min-height:73px}
  .brand{min-width:0;gap:9px}
  .brand-symbol{width:36px;height:36px}
  .brand-type strong{font-size:12px}
  .brand-type small{font-size:8px}
  .header-actions{margin-left:auto}
  .menu-switch{display:grid}
  .nav{display:none;position:absolute;left:0;right:0;top:73px;background:var(--bg);border-bottom:1px solid var(--line);padding:22px 20px 27px;margin:0;flex-direction:column;align-items:stretch;gap:0;box-shadow:0 14px 18px var(--shadow)}
  .nav.open{display:flex}
  .nav a{padding:15px 8px;font-size:16px;border-bottom:1px solid var(--line)}
  .nav a:last-child{border-bottom:0}
  .hero{padding-top:31px}
  .hero-kicker{font-size:9px}
  .hero-grid{display:flex;flex-direction:column;gap:0;min-height:0}
  .hero-content{width:100%;padding:49px 0 20px}
  .hero-prelude{font-size:10px;margin-bottom:26px}
  .hero h1{font-size:clamp(54px,10.5vw,80px);white-space:normal;line-height:1.07;margin-bottom:27px}
  .hero-description{font-size:15px;line-height:1.75;margin-bottom:27px}
  .hero-figure{max-width:490px;margin:5px auto 25px}
  .figure-caption{font-size:9px}
  .hero-tail{font-size:9px;padding:18px 0 22px}
  .section{padding:83px 0}
  .section-columns{display:block}
  .section-number{margin-bottom:47px;padding:0}
  .section h2{font-size:clamp(46px,9vw,66px);margin-bottom:31px}
  .section .section-eyebrow{font-size:10px;margin-bottom:25px}
  .statement .statement-bottom{display:block}
  .statement-bottom p{font-size:15px;margin-bottom:21px}
  .quote-rule{margin-top:57px;gap:15px;flex-wrap:wrap;justify-content:flex-start;font-size:9px;line-height:1.5}
  .quote-rule span:not(:last-child):after{content:"/";margin-left:12px;color:var(--accent)}
  .section-heading{margin-bottom:44px}
  .section-heading .intro{font-size:15px}
  .discipline-list{grid-template-columns:1fr}
  .discipline-card,.discipline-card:first-child,.discipline-card:last-child{padding:26px 0 27px;min-height:unset}
  .discipline-card+.discipline-card{border-left:0;border-top:1px solid var(--line)}
  .discipline-top{margin-bottom:10px}
  .discipline-top svg{width:62px;height:62px}
  .discipline-card h3{font-size:39px;margin-bottom:18px}
  .discipline-card p:not(.discipline-overline){font-size:14px;margin-bottom:27px;max-width:500px}
  .discipline-disclaimer{font-size:11px}
  .method-workspace{display:block}
  .method-controls{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:auto}
  .method-step{padding:22px 18px;font-size:10px;min-height:67px}
  .method-step:nth-child(even){border-right:0}
  .method-step:nth-child(1),.method-step:nth-child(2){border-bottom:1px solid var(--line)}
  .method-step.active{box-shadow:inset 0 3px var(--accent)}
  .method-display{padding:22px 18px}
  .method-display-top,.method-display-foot{font-size:9px;letter-spacing:.05em}
  .method-explanation{min-height:0;margin:4px 0 32px}
  .method-explanation h3{font-size:31px}
  .method-graphic{margin:5px auto;max-width:560px}
  .commitments .section-body h2{margin-bottom:40px}
  .principle-row{grid-template-columns:30px 1fr;gap:9px 16px;padding:22px 0}
  .principle-row h3{font-size:16px}
  .principle-row p{font-size:14px}
  .closing-inner{padding:92px 0}
  .closing h2{font-size:clamp(50px,9vw,69px)}
  .closing-emblem{width:300px;height:300px;right:-90px;top:45px}
  .footer-top{flex-wrap:wrap;gap:15px}
  .footer-top>span{display:none}
  .footer-bottom{display:block;font-size:11px}
  .footer-bottom p{text-align:left;max-width:570px;margin-top:14px}
}
@media(max-width:370px){
  .hero h1{font-size:49px}
  .hero-index{display:none}
  .method-step{font-size:9px;letter-spacing:.08em}
  .figure-caption{font-size:8px}
}
@media(prefers-reduced-motion:reduce){
  *,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  html{scroll-behavior:auto}
  .symbol-n{stroke-dashoffset:0}
  .research-curve{stroke-dashoffset:0!important}
}