:root{
  --paper:#EEF1E8; --paper-2:#E2E8D9; --ink:#1F3A2E; --ink-soft:#4A5D50;
  --olive:#6B7F4E; --sage:#C9D3BC; --ochre:#B8892C; --band:#1F3A2E; --band-ink:#E8EEDF;
  --rule:rgba(31,58,46,.18); --sage-line:#8FA477; --orbit:#4B7BB8; --leaf-1:#55703F; --leaf-2:#7A9353; --leaf-3:#A9BE7E; --curve:#6B7F4E; --panel:#FFFFFF;
  --serif:"Spectral", Georgia, "Times New Roman", serif;
  --sans:"Karla", "Segoe UI", Helvetica, Arial, sans-serif;
  color-scheme:light;
  box-sizing:border-box;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --paper:#16231B; --paper-2:#1C2C22; --ink:#E4EADB; --ink-soft:#AEBBA8;
    --olive:#A3B67F; --sage:#3A4A3C; --ochre:#D8AE52; --band:#0F1A13; --band-ink:#E4EADB;
    --rule:rgba(228,234,219,.16); --sage-line:#7F946B; --orbit:#7FA7DB; --leaf-1:#6E8A52; --leaf-2:#94AD6B; --leaf-3:#C2D49A; --curve:#A3B67F; --panel:#F4F6F0;
    color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --paper:#16231B; --paper-2:#1C2C22; --ink:#E4EADB; --ink-soft:#AEBBA8;
  --olive:#A3B67F; --sage:#3A4A3C; --ochre:#D8AE52; --band:#0F1A13; --band-ink:#E4EADB;
  --rule:rgba(228,234,219,.16); --sage-line:#7F946B; --orbit:#7FA7DB; --leaf-1:#6E8A52; --leaf-2:#94AD6B; --leaf-3:#C2D49A; --curve:#A3B67F; --panel:#F4F6F0;
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:calc(env(safe-area-inset-top,0px) + 72px);-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:1.0625rem;line-height:1.6}
body::before{content:"";position:fixed;inset:0 0 auto;height:env(safe-area-inset-top,0px);z-index:10;background:var(--paper)}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-underline-offset:.2em;text-decoration-thickness:1px}
a:hover{color:var(--olive)}
:focus-visible{outline:2px solid var(--ochre);outline-offset:3px;border-radius:2px}
.wrap{max-width:72rem;margin:0 auto;padding:0 1.5rem}

/* header */
.site-head{position:sticky;top:env(safe-area-inset-top,0px);z-index:5;background:var(--paper);border-bottom:1px solid var(--rule)}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:64px}
.brand{font-family:var(--serif);font-weight:600;font-size:1.5rem;text-decoration:none;letter-spacing:-.01em;display:flex;align-items:center;gap:.5rem}
.brand svg{width:56px;height:32px;flex:none}
nav ul{list-style:none;margin:0;padding:0;display:flex;gap:1.4rem;flex-wrap:wrap}
nav a{text-decoration:none;font-size:.95rem;color:var(--ink-soft);padding:.25rem 0;border-bottom:2px solid transparent}
nav a:hover{color:var(--ink)}
nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--ochre)}
.menu-btn{display:none;background:none;border:1px solid var(--rule);color:var(--ink);font:inherit;padding:.35rem .75rem;border-radius:4px;cursor:pointer}

/* hero */
.hero{padding:5rem 0 0}
.hero h1{font-family:var(--serif);font-weight:400;font-size:clamp(2.6rem,7vw,5.6rem);line-height:1.02;letter-spacing:-.025em;margin:0;max-width:20ch}
.hero .lede{font-size:1.25rem;color:var(--ink-soft);max-width:36rem;margin:1.6rem 0 .4rem}
.hero .affil{font-size:.95rem;color:var(--ink-soft);max-width:36rem;margin:0}
.hero .affil a{text-decoration:none;border-bottom:1px solid var(--rule)}
.hero .affil a:hover{color:var(--ink);border-bottom-color:var(--ochre)}
.season{margin:3.5rem 0 0;position:relative}
.season svg{width:100%;height:auto;display:block;overflow:visible}
.season .line{fill:none;stroke:var(--ochre);stroke-width:2.5;stroke-linecap:round}
.season .fill{fill:var(--sage);opacity:.55}
.season .axis{stroke:var(--rule);stroke-width:1}
.season text{font-family:var(--sans);font-size:13px;fill:var(--ink-soft)}
.season .note{font-family:var(--serif);font-style:italic;font-size:15px;fill:var(--ink)}
.season figcaption{font-size:.9rem;color:var(--ink-soft);margin-top:.75rem;max-width:40rem}
@media (prefers-reduced-motion:no-preference){
  .season .line{stroke-dasharray:1400;stroke-dashoffset:1400;animation:draw 2.4s ease-out .3s forwards}
  .season .fill,.season .note{opacity:0;animation:appear 1s ease-out 2.2s forwards}
  @keyframes draw{to{stroke-dashoffset:0}}
  @keyframes appear{to{opacity:.55}}
  .season .note{animation-name:appearfull}
  @keyframes appearfull{to{opacity:1}}
}

/* sections */
section{padding:5rem 0}
h2{font-family:var(--serif);font-weight:500;font-size:clamp(1.8rem,3.4vw,2.6rem);line-height:1.15;letter-spacing:-.015em;margin:0 0 1.5rem;max-width:22ch}
h3{font-family:var(--serif);font-weight:500;font-size:1.45rem;line-height:1.25;margin:0 0 .6rem}
p{margin:0 0 1rem;max-width:40rem}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:3rem;margin-top:2rem}
.pair p{color:var(--ink-soft)}
.areas{list-style:none;margin:2rem 0 0;padding:0;border-top:1px solid var(--rule)}
.areas li{display:grid;grid-template-columns:minmax(12rem,1fr) 2fr;gap:2rem;padding:1.6rem 0;border-bottom:1px solid var(--rule)}
.areas h3{margin:0}
.areas p{margin:0;color:var(--ink-soft)}

.band{background:var(--band);color:var(--band-ink)}
.band .grid{display:grid;grid-template-columns:1.1fr 1fr;gap:3rem;align-items:center}
.band p{color:var(--band-ink);opacity:.85}
.band h2{color:var(--band-ink)}
.btn{display:inline-block;font-family:var(--sans);font-weight:700;font-size:1rem;text-decoration:none;background:var(--ochre);color:#1B1A12;padding:.8rem 1.4rem;border-radius:3px;margin-top:.5rem}
.btn:hover{color:#1B1A12;filter:brightness(1.08)}
.btn.ghost{background:transparent;color:inherit;border:1px solid currentColor;margin-left:.75rem}
.btn.ghost:hover{color:inherit;background:rgba(255,255,255,.06)}
.mini-map{width:100%;max-width:26rem;justify-self:end}

.stories{list-style:none;margin:2rem 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(15rem,1fr));gap:0 2.5rem}
.stories a{display:flex;justify-content:space-between;gap:1rem;font-family:var(--serif);font-size:1.3rem;text-decoration:none;padding:1rem 0;border-bottom:1px solid var(--rule)}
.stories span{font-family:var(--sans);font-size:.85rem;color:var(--ink-soft);align-self:center}

footer{border-top:1px solid var(--rule);padding:3rem 0 3.5rem;font-size:.95rem;color:var(--ink-soft)}
footer .wrap{display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap}
footer p{margin:0 0 .3rem}

/* GPP page */
.page-head{padding:4.5rem 0 1rem}
.page-head h1{font-family:var(--serif);font-weight:400;font-size:clamp(2.4rem,6vw,4.6rem);line-height:1.04;letter-spacing:-.025em;margin:0 0 1.5rem;max-width:16ch}
.page-head .lede{font-size:1.2rem;color:var(--ink-soft);max-width:40rem}
.article section{padding:3.5rem 0;border-top:1px solid var(--rule)}
.article .cols{display:grid;grid-template-columns:minmax(12rem,1fr) 2.4fr;gap:2.5rem}
.article .cols h2{font-size:1.75rem}
.equation{font-family:var(--serif);font-size:clamp(1.05rem,2.2vw,1.45rem);background:var(--paper-2);padding:1.25rem 1.5rem;border-left:3px solid var(--ochre);margin:1.5rem 0;overflow-x:auto;white-space:nowrap}
.equation sub{font-size:.65em}
dl.scalars{margin:1.5rem 0 0;max-width:42rem}
dl.scalars dt{font-family:var(--serif);font-weight:600;font-size:1.15rem;margin-top:1.25rem}
dl.scalars dt small{font-family:var(--sans);font-weight:400;font-size:.85rem;color:var(--ink-soft);margin-left:.4rem}
dl.scalars dd{margin:.25rem 0 0;color:var(--ink-soft)}
figure.flow{float:right;width:min(24rem,46%);margin:.3rem 0 1.25rem 2rem}
figure.flow .zoom{display:block;padding:0;border:0;background:none;cursor:zoom-in;width:100%}
figure.flow img{width:100%;height:auto}
figure.flow figcaption{color:var(--ink-soft);font-size:.82rem;line-height:1.45;margin-top:.6rem}
.article .cols > div::after{content:"";display:block;clear:both}
dialog.lightbox{border:0;padding:1rem;max-width:min(64rem,94vw);background:var(--paper);border-radius:4px}
dialog.lightbox::backdrop{background:rgba(15,26,19,.75)}
dialog.lightbox img{max-height:84vh;width:auto;margin:0 auto}
dialog.lightbox button{font:inherit;margin:.75rem auto 0;display:block;background:var(--band);color:#E8EEDF;border:0;padding:.5rem 1.2rem;border-radius:3px;cursor:pointer}
.refs{list-style:none;padding:0;margin:0;max-width:44rem}
.refs li{padding-left:1.5rem;text-indent:-1.5rem;margin-bottom:1rem;color:var(--ink-soft);font-size:.98rem}
.refs a{word-break:break-all}

[hidden]{display:none!important}

@media (max-width:860px){
  .menu-btn{display:block}
  nav{position:absolute;left:0;right:0;top:100%;background:var(--paper);border-bottom:1px solid var(--rule);display:none}
  nav.open{display:block}
  nav ul{flex-direction:column;gap:0;padding:.5rem 1.5rem 1rem}
  nav a{display:block;padding:.7rem 0;border-bottom:1px solid var(--rule)}
  nav a[aria-current="page"]{border-bottom-color:var(--rule);color:var(--ochre)}
  .pair,.band .grid,.areas li,.article .cols{grid-template-columns:1fr;gap:1rem}
  .pair{gap:2rem}
  .mini-map{justify-self:start;max-width:18rem}
  .hero{padding-top:3rem}
  section{padding:3.5rem 0}
  .btn.ghost{margin-left:0;margin-top:.75rem}
  figure.flow{float:none;width:100%;margin:1.5rem 0}
}

.story-cards a{padding:0;overflow:hidden}
.story-cards .thumb{display:block;width:100%;height:auto;aspect-ratio:16/10;object-fit:cover;background:var(--sage)}
.story-cards .txt{display:flex;flex-direction:column;gap:.35rem;padding:1rem 1.25rem 1.4rem}
.compare .layer.before img{width:100%;height:100%;object-fit:cover}
.compare .layer img{display:block;width:100%;height:auto}
.shot img{display:block;width:100%;height:auto}
.shot.narrow{max-width:30rem}
.lakes-intro{display:grid;grid-template-columns:1.25fr 1fr;gap:3rem;align-items:start}
.lakes-intro .shot{margin:0}
.lake-cards{list-style:none;margin:0;padding:0;border-top:1px solid var(--rule)}
.lake-cards a{display:grid;grid-template-columns:1fr auto;gap:.15rem 1rem;padding:1rem 0;border-bottom:1px solid var(--rule);text-decoration:none}
.lake-cards a:hover .t{color:var(--olive)}
.lake-cards .t{font-family:var(--serif);font-size:1.35rem}
.lake-cards .meta{font-size:.88rem;color:var(--olive);align-self:center;text-align:right}
.lake-cards .b{grid-column:1/-1;font-size:.95rem;color:var(--ink-soft)}
.others{margin:0;font-size:1.05rem;line-height:2}
.stepper{margin-top:1.25rem}
.stepper-btns{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1rem}
.stepper-btns button{font:inherit;font-size:.92rem;background:var(--paper-2);color:var(--ink);border:1px solid var(--rule);border-radius:3px;padding:.45rem .75rem;cursor:pointer;line-height:1.2;text-align:left}
.stepper-btns button span{display:block;font-size:.78rem;color:var(--ink-soft)}
.stepper-btns button[aria-pressed="true"]{background:var(--band);color:var(--band-ink);border-color:var(--band)}
.stepper-btns button[aria-pressed="true"] span{color:var(--band-ink);opacity:.75}
.stepper .step{display:grid;grid-template-columns:1.4fr 1fr;gap:1rem;align-items:start}
.stepper .step img{display:block;width:100%;height:auto;background:#fff}
@media (max-width:860px){
  .lakes-intro,.stepper .step{grid-template-columns:1fr;gap:1.5rem}
}

.crumb{margin:0 0 1rem;font-size:.95rem}
.crumb a{color:var(--ink-soft);text-decoration:none}
.crumb a::before{content:"\2190\00a0"}
.crumb a:hover{color:var(--ink)}
.page-head .when{font-family:var(--serif);font-style:italic;font-size:1.25rem;color:var(--olive);margin:-0.75rem 0 1.25rem}
.intro{font-size:1.1rem;color:var(--ink-soft);max-width:44rem;margin-bottom:2rem}

.story-cards{list-style:none;margin:2rem 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(17rem,1fr));gap:1.25rem}
.story-cards a{display:flex;flex-direction:column;height:100%;text-decoration:none;overflow:hidden;border-top:3px solid var(--olive);background:var(--paper-2)}
.story-cards a:hover{border-top-color:var(--ochre);color:inherit}
.story-cards .t{font-family:var(--serif);font-size:1.45rem;line-height:1.2}
.story-cards .meta{font-size:.9rem;color:var(--olive);font-weight:500}
.story-cards .b{font-size:.98rem;color:var(--ink-soft);margin-top:.35rem}

.projects{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:1.25rem}
.projects a{display:block;text-decoration:none;padding:1.5rem;background:var(--band);color:var(--band-ink);height:100%}
.projects a:hover{color:var(--band-ink);outline:2px solid var(--ochre)}
.projects .t{display:block;font-family:var(--serif);font-size:1.6rem;margin-bottom:.4rem}
.projects .b{opacity:.85}

.pgroup{display:grid;grid-template-columns:minmax(14rem,1fr) 2fr;gap:2.5rem;padding:1.75rem 0;border-top:1px solid var(--rule)}
.pgroup h3{margin-bottom:.5rem}
.pgroup p{color:var(--ink-soft);font-size:.98rem}
.pgroup:not(.open) li.more{display:none}
.more-btn{font:inherit;font-weight:500;font-size:.95rem;background:none;border:0;padding:.25rem 0;color:var(--olive);cursor:pointer;margin-left:1.1rem}
.more-btn:hover{color:var(--ink);text-decoration:underline}
.plist{margin:0;padding:0 0 0 1.1rem;max-width:44rem}
.plist li{margin:0 0 .7rem;font-size:.97rem;line-height:1.5}
.plist a{text-decoration:none}
.plist .py{font-family:var(--serif);color:var(--olive);margin-right:.5rem}
.plist a:hover{text-decoration:underline}

.profiles{display:flex;flex-wrap:wrap;gap:.75rem;margin:1rem 0 1.5rem}
.profiles .btn{margin:0}
.btn.outline{background:transparent;color:var(--ink);border:1px solid var(--ink-soft)}
.btn.outline:hover{border-color:var(--ochre);color:var(--ink);filter:none}

.theses{list-style:none;margin:0;padding:0;max-width:46rem}
.theses li:first-child{padding-top:0}
.article .cols{align-items:baseline}
.article .cols:has(> div > figure:first-child){align-items:start}
.article .cols > div > figure:first-child{margin-top:.45rem}
.article .cols > h2{margin-bottom:0}
.theses li{display:grid;grid-template-columns:3.5rem 1fr;gap:.15rem 1rem;padding:.9rem 0;border-bottom:1px solid var(--rule)}
.theses .y{grid-row:span 2;font-family:var(--serif);font-size:1.1rem;color:var(--olive)}
.theses .w{font-weight:500}
.theses a{color:var(--ink-soft);text-decoration:none;font-size:.97rem}
.theses a:hover{color:var(--ink);text-decoration:underline}

.person .role{font-family:var(--serif);font-style:italic;color:var(--olive);font-size:1.15rem;margin-top:-.25rem}
.person p{color:var(--ink-soft)}
.person .links{display:flex;flex-wrap:wrap;gap:1.25rem;margin-top:1.25rem}
.members{display:grid;align-items:baseline;grid-template-columns:12rem 1fr;gap:1rem 2rem;margin:0}
.members dt{font-weight:500;color:var(--ink-soft)}
.members dd{margin:0;line-height:1.9}
.members dd a{text-decoration:none;border-bottom:1px solid var(--rule)}
.members dd a:hover{border-bottom-color:var(--ochre);color:inherit}
.members .y{color:var(--olive);font-size:.9rem;margin-left:.35rem}
.seealso{color:var(--ink-soft);font-size:.95rem;margin-top:1.5rem}

.contact{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}
.contact .big{font-family:var(--serif);font-size:1.5rem;margin:.25rem 0}
.contact .big a{text-decoration:none}
.contact address{font-style:normal;line-height:1.9;color:var(--ink-soft)}

.ph{display:flex;align-items:flex-end;justify-content:flex-start;aspect-ratio:4/3;width:100%;padding:1rem;font-size:.9rem;color:#fff}
.ph span{background:rgba(0,0,0,.35);padding:.2rem .5rem;border-radius:2px}
.ph-a{background:linear-gradient(135deg,#5f7a4a,#8aa06a 40%,#a69a6b)}
.ph-b{background:linear-gradient(135deg,#6f8a5a,#a7b58a 50%,#c6b98f)}
.ph-c{background:repeating-linear-gradient(45deg,#5d5d5d 0 6px,#6c6c6c 6px 12px)}
.ph-d{background:radial-gradient(circle at 40% 55%,#151515 0 32%,transparent 33%),repeating-linear-gradient(45deg,#5d5d5d 0 6px,#6c6c6c 6px 12px)}
.ph-e{background:radial-gradient(circle at 55% 50%,#4a3424 0 30%,transparent 31%),linear-gradient(135deg,#5f7a4a,#8aa06a 40%,#a69a6b)}
.ph-f{background:linear-gradient(135deg,#d8d8d8,#bdbdbd)}
.ph-g{background:radial-gradient(circle at 55% 50%,#111 0 30%,transparent 31%),linear-gradient(135deg,#d8d8d8,#bdbdbd)}
.shot{margin:1.25rem 0 0}
.shot figcaption,.compare-fig figcaption{font-size:.9rem;color:var(--ink-soft);margin-top:.6rem}
.todo{color:var(--ochre);font-style:italic}
a[data-todo]{opacity:.55}

.compare-fig{margin:1.25rem 0 0}
.compare{position:relative;overflow:hidden;user-select:none;touch-action:pan-y}
.compare .layer{position:relative}
.compare .layer.before{position:absolute;inset:0;clip-path:inset(0 calc(100% - var(--pos)) 0 0)}
.compare .layer img,.compare .layer .ph{display:block;width:100%}
.compare .handle{position:absolute;top:0;bottom:0;left:var(--pos);width:2px;margin-left:-1px;background:#fff;box-shadow:0 0 0 1px rgba(0,0,0,.25);pointer-events:none}
.compare .handle::after{content:"";position:absolute;top:50%;left:50%;width:34px;height:34px;margin:-17px 0 0 -17px;border-radius:50%;background:#fff;box-shadow:0 1px 4px rgba(0,0,0,.35);
  background-image:linear-gradient(90deg,transparent 9px,#1F3A2E 9px,#1F3A2E 11px,transparent 11px,transparent 23px,#1F3A2E 23px,#1F3A2E 25px,transparent 25px)}
.compare input[type=range]{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:ew-resize}
.compare input[type=range]:focus-visible + .tag{outline:2px solid var(--ochre)}
.compare .tag{position:absolute;bottom:.75rem;font-size:.82rem;font-weight:500;background:rgba(15,26,19,.72);color:#fff;padding:.25rem .55rem;border-radius:2px;pointer-events:none}
.compare .tag.l{left:.75rem}.compare .tag.r{right:.75rem}

@media (max-width:860px){
  .projects,.pgroup,.contact{grid-template-columns:1fr;gap:1rem}
  .members{grid-template-columns:1fr;gap:.25rem}
  .members dd{margin-bottom:1rem}
  .seealso{grid-column:auto!important}
}