:root{
  --paper:#f6f3ec; --paper-2:#efeadf; --card:#fbf9f4; --line:#e2dccd;
  --ink:#1f2a24; --ink-2:#4b574f; --ink-3:#7a847c;
  --river:#2f6f73; --river-2:#4f8f92; --kingfisher:#e07b2e; --moss:#5b7a4a; --reed:#b8913a; --water:rgba(64,128,150,.62);
  --ease:cubic-bezier(.16,1,.3,1);
  --serif:"Newsreader",Georgia,serif; --sans:"Inter",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:72px}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:var(--river)}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
h1,h2,h3{font-family:var(--serif);font-weight:400;letter-spacing:-.015em;line-height:1.08}
h2{font-size:clamp(34px,5vw,58px);max-width:18ch;margin:10px 0 22px}
h3{font-size:22px;line-height:1.2}
.kicker{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--river);font-weight:600}
.lede{font-size:clamp(17px,1.5vw,20px);color:var(--ink-2);max-width:60ch}
.src{font-size:13px;color:var(--ink-3);max-width:80ch;margin-top:22px;line-height:1.55}
section{padding:clamp(72px,11vh,128px) 0}

/* nav */
.nav{position:fixed;inset:0 0 auto;z-index:20;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 24px;transition:background .5s var(--ease),box-shadow .5s var(--ease)}
.nav.solid{background:rgba(246,243,236,.86);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);box-shadow:0 1px 0 var(--line)}
.brand{display:flex;align-items:center;gap:8px;font-family:var(--serif);font-size:19px;color:var(--ink);text-decoration:none}
.brand img{width:40px;height:40px}
.nav nav{display:flex;gap:22px}
.nav nav a{font-size:14px;color:var(--ink-2);text-decoration:none}
.nav nav a:hover{color:var(--river)}
.nav nav a[aria-current=page]{color:var(--river);font-weight:600}

/* hero */
.hero{position:relative;min-height:100svh;display:grid;align-items:end;padding:0 0 clamp(48px,9vh,96px);overflow:hidden}
.hero-art{position:absolute;inset:0}
.hero-art img{width:100%;height:100%;object-fit:cover;object-position:50% 40%;transform:scale(1.06);opacity:0;transition:transform 2.6s var(--ease),opacity 1.6s ease}
.loaded .hero-art img{transform:scale(1);opacity:1}
.hero-art::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(246,243,236,0) 30%,rgba(246,243,236,.72) 62%,var(--paper) 92%),linear-gradient(90deg,rgba(246,243,236,.78),rgba(246,243,236,.35) 45%,rgba(246,243,236,0) 72%)}
.hero-art.missing{background:radial-gradient(120% 80% at 70% 30%,#dfe8df,var(--paper))}
.hero-copy{position:relative;max-width:1120px;width:100%;margin:0 auto;padding:0 24px}
.hero h1{font-size:clamp(44px,7.4vw,96px);max-width:14ch;margin:14px 0 22px}
.split .w{display:inline-block;opacity:0;transform:translateY(.4em);transition:opacity 1s var(--ease),transform 1.2s var(--ease)}
.loaded .split .w{opacity:1;transform:none}
.cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.btn{display:inline-block;padding:13px 22px;border-radius:999px;background:var(--ink);color:var(--paper);text-decoration:none;font-weight:550;font-size:15px;transition:transform .4s var(--ease),background .3s}
.btn:hover{transform:translateY(-2px);background:var(--river)}
.btn.ghost{background:transparent;color:var(--ink);box-shadow:inset 0 0 0 1.5px var(--ink)}
.btn.ghost:hover{background:var(--ink);color:var(--paper)}

/* reveal */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity 1s var(--ease),transform 1.2s var(--ease)}
.js .reveal.in{opacity:1;transform:none}

/* story */
.story{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:clamp(24px,5vw,72px);max-width:1120px;margin:0 auto;padding-left:24px;padding-right:24px}
.story-river{position:sticky;top:12vh;height:76vh;align-self:start}
.story-river svg{width:100%;height:100%;overflow:hidden;-webkit-mask-image:radial-gradient(closest-side,#000 72%,transparent);mask-image:radial-gradient(closest-side,#000 72%,transparent)}
.story-river .park{fill:#e9e4d6;stroke:#d3ccb8;stroke-width:2}
.story-river .lake{fill:#cfe0de}
.story-river .pipe{fill:none;stroke:#b9b1a0;stroke-width:5;stroke-dasharray:2 9;stroke-linecap:round}
.story-river .flow{fill:none;stroke:var(--river);stroke-width:6;stroke-linecap:round;stroke-linejoin:round}
.timeline{list-style:none;margin-top:12px}
.timeline li{padding:22px 0 22px 28px;border-left:1.5px solid var(--line);position:relative}
.timeline li::before{content:"";position:absolute;left:-6px;top:30px;width:10px;height:10px;border-radius:50%;background:var(--paper);border:1.5px solid var(--river)}
.timeline b{display:block;font-family:var(--serif);font-size:22px;font-weight:500}
.timeline span{color:var(--ink-2)}

/* 3D model video */
.model-stage{margin-top:30px;border-radius:22px;overflow:hidden;background:var(--paper-2);box-shadow:0 30px 70px -40px rgba(31,42,36,.45)}
.model-stage video{display:block;width:100%;height:auto}

/* bowl */
.bowl{background:var(--paper-2)}
.bowl-stage{position:relative;margin:30px auto 0;max-width:min(100%,calc(100vh - 150px));border-radius:22px;overflow:hidden;background:#efeadf;box-shadow:0 30px 70px -40px rgba(31,42,36,.45)}
#bowl-canvas{display:block;width:100%;height:auto}
.bowl-ui{position:absolute;left:18px;right:18px;bottom:18px;display:grid;grid-template-columns:auto 1fr;gap:6px 14px;align-items:center;background:rgba(251,249,244,.9);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);padding:14px 18px;border-radius:14px;max-width:560px}
.bowl-ui label{font-weight:600;font-size:14px}
.bowl-ui output{grid-column:1/-1;font-size:14px;color:var(--ink-2);font-variant-numeric:tabular-nums}
input[type=range]{width:100%;accent-color:var(--river)}

/* map */
.map-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:28px;margin-top:30px;align-items:start}
.map-stage{background:var(--card);border-radius:22px;padding:10px;box-shadow:0 30px 70px -45px rgba(31,42,36,.45)}
#map-svg{display:block;width:100%;height:auto;overflow:hidden}
#map-svg .park{fill:#ece8da;stroke:#cdc5af;stroke-width:2}
#map-svg .paths path{fill:none;stroke:#fff;stroke-width:2.2;stroke-linecap:round;opacity:.9}
#map-svg .hab path{transition:opacity .8s var(--ease)}
#map-svg .water{fill:#bcd6d4}
#map-svg .marsh{fill:#c9d7b4}
#map-svg .wood{fill:#9fb78e}
#map-svg .scrub{fill:#b9c49a}
#map-svg .meadow{fill:#e3d89b}
#map-svg .river{fill:none;stroke:var(--river);stroke-width:4;stroke-linecap:round}
#map-svg .culvert{fill:none;stroke:#9a917f;stroke-width:3;stroke-dasharray:3 6;stroke-linecap:round}
#map-svg .streams{fill:none;stroke:var(--river-2);stroke-width:2}
.poi{cursor:pointer}
.poi circle.ring{fill:none;stroke:var(--ink);stroke-width:1.5;opacity:.5;transform-box:fill-box;transform-origin:center;animation:pulse 2.8s var(--ease) infinite}
.poi circle.dot{fill:var(--ink);stroke:var(--paper);stroke-width:3;transition:r .3s var(--ease)}
.poi:hover circle.dot,.poi.on circle.dot{fill:var(--river)}
.poi text{font-family:var(--sans);font-size:13px;font-weight:600;fill:var(--ink);paint-order:stroke;stroke:var(--paper);stroke-width:4px}
@keyframes pulse{0%{transform:scale(.6);opacity:.6}70%{transform:scale(1.9);opacity:0}100%{opacity:0}}
.map-card{background:var(--card);border-radius:22px;padding:24px;min-height:220px;box-shadow:0 30px 70px -45px rgba(31,42,36,.45)}
.map-card img{border-radius:12px;margin:-6px 0 16px;background:var(--paper)}
.map-card h3{margin-bottom:8px}
.map-card p{color:var(--ink-2)}
.map-card .hint{color:var(--ink-3)}
.map-card .fact{margin-top:12px;font-size:13px;color:var(--ink-3)}
.legend{list-style:none;display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:20px;font-size:14px;color:var(--ink-2)}
.legend i{display:inline-block;width:14px;height:14px;border-radius:4px;margin-right:8px;vertical-align:-2px}
.legend i.line{height:4px;border-radius:2px;vertical-align:3px}
.legend i.dash{height:0;border-top:3px dashed #9a917f;border-radius:0;vertical-align:4px}

/* seasons */
.tabs{display:inline-flex;gap:4px;padding:5px;background:var(--paper-2);border-radius:999px;margin:8px 0 34px}
.tabs button{border:0;background:none;font:inherit;font-size:15px;padding:9px 18px;border-radius:999px;color:var(--ink-2);cursor:pointer;transition:background .4s var(--ease),color .3s}
.tabs button[aria-selected=true]{background:var(--ink);color:var(--paper)}
.tabs button.now::after{content:" · now";font-size:12px;opacity:.75}
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.card{background:var(--card);border-radius:20px;overflow:hidden;box-shadow:0 26px 60px -45px rgba(31,42,36,.5);opacity:0;transform:translateY(16px);transition:opacity .9s var(--ease),transform 1s var(--ease)}
.card.in{opacity:1;transform:none}
.card figure{aspect-ratio:3/2;background:var(--paper);overflow:hidden}
.card figure img{width:100%;height:100%;object-fit:cover;transition:transform 1.4s var(--ease)}
.card:hover figure img{transform:scale(1.04)}
.card div{padding:18px 20px 22px}
.card h3{font-size:22px}
.card .latin{font-family:var(--serif);font-style:italic;color:var(--ink-3);font-size:15px;margin:2px 0 8px}
.card p{color:var(--ink-2);font-size:15px}
.card .seen{display:inline-block;margin-top:12px;font-size:12px;font-weight:600;color:var(--moss);background:#e8eedf;border-radius:999px;padding:3px 10px}

/* hunt */
.hunt{background:linear-gradient(180deg,var(--paper),#eaf0ea)}
.count{color:var(--river);font-variant-numeric:tabular-nums}
.goal{display:flex;align-items:center;gap:16px;margin:28px 0 8px;max-width:620px}
.goal-bar{flex:1;height:12px;border-radius:99px;background:#dde4dc;overflow:hidden}
.goal-bar i{display:block;height:100%;width:0;border-radius:99px;background:linear-gradient(90deg,var(--river),var(--moss));transition:width 2.2s var(--ease)}
.goal span{font-size:14px;color:var(--ink-2);white-space:nowrap;font-variant-numeric:tabular-nums}
.hunt .wrap,.pics .wrap,.help .wrap{position:relative}
.corner-art{position:absolute;right:24px;top:0;width:190px;height:auto}
.corner-art.tilt{rotate:6deg}  /* rotate, not transform: the reveal animation owns transform */
.corner-art.mascot{width:190px;top:-40px}
.foot-emblem{width:120px;height:auto;margin-bottom:18px}
.news{background:var(--paper-2)}
.news-box{display:grid;grid-template-columns:1.1fr 1fr;gap:48px;align-items:start}
.signup{display:grid;gap:14px;background:var(--card);border-radius:20px;padding:26px}
.signup label{display:grid;gap:6px;font-weight:600;font-size:15px}
.signup label i{font-style:normal;font-weight:400;color:var(--ink-3)}
.signup input[type=email],.signup input:not([type]){font:inherit;font-weight:400;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;background:#fff}
.signup input:focus{outline:2px solid var(--river);outline-offset:1px}
.signup .check{grid-template-columns:auto 1fr;align-items:start;font-weight:400;font-size:14px;color:var(--ink-2);gap:10px}
.signup .check input{width:18px;height:18px;margin-top:2px;accent-color:var(--river)}
.signup .hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.signup button{justify-self:start;border:0;cursor:pointer}
.signup button[disabled]{opacity:.6;cursor:wait}
.news-box>*{min-width:0}  /* the file picker's built-in width must not widen the column on phones */
.signup input[type=file]{width:100%;min-width:0;font:inherit;font-size:14px;font-weight:400;padding:10px;border:1.5px dashed var(--line);border-radius:12px;background:#fff}
.photo-preview{width:100%;max-height:320px;object-fit:contain;border-radius:12px;background:var(--paper-2)}
.photo-preview[hidden]{display:none}
.rules{margin:18px 0 0;padding-left:20px;color:var(--ink-2);max-width:60ch}
.rules li{margin:6px 0}
.signup-msg{font-size:15px;min-height:1.4em;margin:0}
.signup-msg.ok{color:var(--moss);font-weight:600}
.signup-msg.err{color:#a3402a}
/* page heads (every page but home) */
.page-head{padding:118px 0 40px;background:var(--paper)}
.page-head .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:20px 48px;align-items:center}
.page-head-art{grid-column:2;grid-row:1/span 4;border-radius:22px;overflow:hidden;aspect-ratio:3/2;box-shadow:0 30px 70px -40px rgba(31,42,36,.45)}

.page-head h1{font-size:clamp(40px,5.4vw,68px);margin:8px 0 14px}
.page-head .lede{margin:0}
.page-head-art img{width:100%;height:100%;object-fit:cover}
.jump{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.jump a{font-size:14px;font-weight:600;color:var(--river);text-decoration:none;padding:9px 14px;border-radius:999px;box-shadow:inset 0 0 0 1.5px var(--line)}
.jump a:hover{box-shadow:inset 0 0 0 1.5px var(--river)}
/* home: three ways in */
.explore-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:34px}
.explore-card{display:block;background:var(--card);border-radius:20px;overflow:hidden;color:var(--ink);text-decoration:none;box-shadow:0 24px 50px -40px rgba(31,42,36,.5);transition:transform .5s var(--ease)}
.explore-card:hover{transform:translateY(-4px)}
.explore-card img{width:100%;aspect-ratio:3/2;object-fit:cover}
.explore-card div{padding:20px 22px 24px}
.explore-card p{color:var(--ink-2);font-size:15px;margin:8px 0 14px}
.explore-card span{font-size:14px;font-weight:600;color:var(--river)}
.foot-nav{display:flex;flex-wrap:wrap;gap:8px 20px;margin-bottom:22px}
.foot-nav a{font-size:14px;font-weight:600;color:var(--river);text-decoration:none}
.pic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin:36px 0 28px}
.pic{display:block;background:var(--card);border-radius:14px;overflow:hidden;color:var(--ink);text-decoration:none;transition:transform .4s var(--ease)}
.pic:hover{transform:translateY(-3px)}
.pic img{width:100%;aspect-ratio:1;object-fit:cover;background:var(--paper-2)}
.pic .cap{padding:8px 10px 10px;font-size:13px;line-height:1.35}
.pic b{display:block;font-weight:600}
.pic span{display:block;color:var(--ink-3);font-size:11.5px;margin-top:2px}
figure.pic{margin:0}
.pic-fail{grid-column:1/-1;color:var(--ink-3);font-size:14px}
.steps{list-style:none;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin:40px 0}
.steps li{background:var(--card);border-radius:20px;padding:24px}
.steps b{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--ink);color:var(--paper);font-family:var(--serif);font-size:18px;margin-bottom:14px}
.steps p{color:var(--ink-2);font-size:15px;margin-top:6px}
.groups{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.groups div{background:var(--card);border-radius:16px;padding:16px 18px}
.groups b{display:block;font-family:var(--serif);font-size:38px;font-weight:400;line-height:1;color:var(--river);font-variant-numeric:tabular-nums}
.groups span{font-size:14px;color:var(--ink-2)}
.all{margin-top:22px}
.all summary{cursor:pointer;font-weight:600;color:var(--river)}
.all ul{list-style:none;columns:3 220px;column-gap:28px;margin-top:16px;font-size:14px}
.all li{break-inside:avoid;padding:3px 0;color:var(--ink-2)}
.all li i{color:var(--ink-3)}

/* gain */
.calc{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.3fr);gap:24px;margin-top:30px;background:var(--card);border-radius:24px;padding:clamp(20px,3vw,34px);box-shadow:0 30px 70px -45px rgba(31,42,36,.45)}
.calc fieldset{border:0}
.calc legend{font-weight:600;margin-bottom:10px}
.calc-pick label{display:block;padding:10px 14px;border-radius:12px;cursor:pointer;transition:background .3s}
.calc-pick label:has(input:checked){background:#e7efe9}
.calc-pick input{accent-color:var(--river);margin-right:8px}
.calc-area{margin-top:16px}
.calc-area label{display:flex;justify-content:space-between;font-weight:600}
.calc-area small{color:var(--ink-3)}
.calc-out{grid-row:1 / span 2;grid-column:2;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px 18px;align-content:center}
.calc-out div span{display:block;font-size:14px;color:var(--ink-2)}
.calc-out div b{font-family:var(--serif);font-weight:300;font-size:clamp(54px,6vw,80px);line-height:1;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.calc-out div:first-child b{color:var(--ink-3)}
.calc-out div:nth-child(3) b{color:var(--moss)}
.calc-out small{color:var(--ink-3)}
.calc-out .arrow{font-size:30px;color:var(--moss)}
.gainpill{grid-column:1/-1;justify-self:start;background:#e3eddc;color:#36572a;font-weight:600;border-radius:999px;padding:9px 16px}
.calc-note{grid-column:1/-1;font-size:14px;color:var(--ink-2)}

/* help */
.help-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin-top:30px}
.help-card{display:block;background:var(--card);border-radius:20px;padding:24px;text-decoration:none;color:var(--ink);transition:transform .5s var(--ease),box-shadow .5s var(--ease)}
a.help-card:hover{transform:translateY(-4px);box-shadow:0 26px 50px -36px rgba(31,42,36,.55)}
.help-card p{color:var(--ink-2);font-size:15px;margin:8px 0 14px}
.help-card span{font-size:13px;font-weight:600;color:var(--river)}
.help-card .tel{font-family:var(--serif);font-size:26px;font-weight:500;color:var(--ink)}

/* footer */
.foot{padding:56px 0 72px;border-top:1px solid var(--line)}
.foot .about{max-width:70ch;color:var(--ink-2)}
.foot .credits{font-size:12.5px;color:var(--ink-3);max-width:100ch;margin-top:16px}

@media (max-width:900px){
  .news-box{grid-template-columns:1fr;gap:24px}
  .corner-art,.corner-art.mascot{position:static;display:block;width:130px;margin:0 0 14px auto}
  .nav{padding:12px 16px;gap:12px}
  .nav nav{gap:16px}
  .page-head .wrap{grid-template-columns:1fr}
  .page-head-art{grid-column:auto;grid-row:auto}
  .explore-grid{grid-template-columns:1fr}
  .story{grid-template-columns:1fr}
  .story-river{position:relative;top:0;height:46vh}
  .map-grid,.calc{grid-template-columns:1fr}
  .calc-out{grid-row:auto;grid-column:auto}
  .cards,.steps,.help-grid{grid-template-columns:1fr}
}
@media (min-width:600px) and (max-width:900px){.cards,.help-grid{grid-template-columns:1fr 1fr}}
@media (max-width:520px){
  .brand span{display:none}
  .nav nav a{font-size:14px}
  body{font-size:16px}
  .tabs{display:flex;width:100%}
  .tabs button{flex:1;padding:9px 6px;font-size:14px}
  .tabs button.now::after{content:""}
  .bowl-ui{left:10px;right:10px;bottom:10px;padding:10px 12px}
  .calc-out{grid-template-columns:1fr auto 1fr}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .js .reveal,.card,.split .w,.hero-art img{opacity:1!important;transform:none!important}
}
.hero .kicker{display:inline-block;background:rgba(246,243,236,.82);padding:5px 12px;border-radius:999px;backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px)}