:root{color:#173247;font-synthesis:none;--ink:#173247;--blue:#155b83;--line:#c8d9e4;--muted:#466174;background:#f7fafc;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:16px;line-height:1.6}*{box-sizing:border-box}body{margin:0}a{color:var(--blue);text-underline-offset:.2em}a:hover{color:#082e4b}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline-offset:4px;outline:3px solid #a9560d}[hidden]{display:none!important}header,main,footer{max-width:1080px;margin:auto;padding:24px 36px}header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;display:flex}.brand{font-size:1.1rem;font-weight:750;text-decoration:none}nav{flex-wrap:wrap;gap:24px;display:flex}nav a{font-size:.9rem}main{padding-top:48px;padding-bottom:70px}h1,h2,h3{color:#14334a;line-height:1.18}h1{letter-spacing:-.025em;margin:0 0 24px;font-family:Georgia,Times New Roman,serif;font-size:clamp(2.35rem,5vw,3.8rem);font-weight:400}h2{margin:0 0 22px;font-size:1.5rem;font-weight:650}h3{font-size:1.05rem;font-weight:650}p{max-width:75ch}.intro{color:var(--muted);max-width:650px;margin-bottom:42px;font-size:1.2rem}section{border-top:1px solid var(--line);margin-top:44px;padding-top:30px}.filters{gap:24px;max-width:720px;display:flex}.filters label{flex-direction:column;flex:2;gap:7px;font-weight:600;display:flex}.filters label+label{flex:1}input,select,button{font:inherit;color:var(--ink);background:#fff;border:1px solid #879fae;border-radius:5px;min-height:44px;padding:10px 13px}button,summary{cursor:pointer}button[aria-pressed=true]{background:var(--blue);color:#fff;border-color:var(--blue)}.lake-list{grid-template-columns:1fr 1fr;column-gap:40px;padding:0;list-style:none;display:grid}.lake-list li{border-bottom:1px solid var(--line)}.lake-list a{justify-content:space-between;align-items:baseline;gap:16px;padding:18px 0;text-decoration:none;display:flex}.lake-list a:hover strong{text-decoration:underline}.lake-list span{text-align:right;color:var(--muted);font-size:.9rem}small{color:var(--muted);font-size:.8rem;display:block}footer{border-top:1px solid var(--line);color:var(--muted);padding-bottom:32px;font-size:.85rem}.skip{z-index:5;background:#fff;padding:12px;position:absolute;top:-100px;left:12px}.skip:focus{top:8px}.breadcrumb{color:var(--muted);margin:0 0 24px;font-size:.9rem}.reading{grid-template-columns:1.15fr 1fr;gap:50px;padding:20px 0 18px;display:grid}.number{font-variant-numeric:tabular-nums;letter-spacing:-.025em;overflow-wrap:anywhere;margin:14px 0;font-size:clamp(2.8rem,6vw,4.2rem);font-weight:600;line-height:1.1}.number span{font-size:1.3rem;font-weight:400}.datum{font-size:1.2rem}.measurement-meta{margin:0;font-size:.9rem}.measurement-meta div{border-bottom:1px solid var(--line);grid-template-columns:1fr 1.5fr;gap:15px;padding:11px 0;display:grid}dt{color:var(--muted)}dd{overflow-wrap:anywhere;margin:0}.freshness{background:#e5eff4;border-radius:4px;width:fit-content;padding:4px 10px;font-weight:650}.stale,.unknown{color:#764800;background:#fff0d9}.notice{background:#fff3df;border-left:3px solid #a66a15;padding:16px 20px;font-size:.95rem}.muted{color:var(--muted);font-size:.9rem}.comparisons{grid-template-columns:1fr 1fr;gap:32px;display:grid}.change{font-variant-numeric:tabular-nums;overflow-wrap:anywhere;margin:10px 0;font-size:1.7rem}.chart{background:#fff;border-radius:6px;width:100%;height:auto;display:block}.chart text{fill:#466174;font-size:12px}.chart-controls{flex-wrap:wrap;align-items:center;gap:10px;margin:24px 0 16px;display:flex}.chart-controls span{margin-right:8px;font-size:.9rem}.chart-controls button{font-size:.85rem}summary{padding:14px 0;font-weight:600}details{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:22px}.table-wrap{max-height:500px;margin:18px 0;overflow:auto}table{border-collapse:collapse;font-variant-numeric:tabular-nums;text-align:left;background:#fff;width:100%;font-size:.85rem}caption{text-align:left;color:var(--muted);padding:0 0 14px}th,td{border-bottom:1px solid var(--line);vertical-align:top;padding:12px 15px}thead th{background:#e8f0f6;position:sticky;top:0}tbody th{white-space:nowrap;font-weight:500}.prose{max-width:760px}.prose h2{margin-top:38px}.prose dt{margin-top:14px}.prose h1{font-size:clamp(2.2rem,5vw,3.4rem)}@media (width<=640px){header,main,footer{padding-left:20px;padding-right:20px}header{flex-direction:column;align-items:flex-start;gap:14px}nav{gap:22px}main{padding-top:30px}.lake-list,.reading{grid-template-columns:1fr}.lake-list{gap:0}.reading{gap:20px}.filters{flex-direction:column;gap:14px}.comparisons{gap:20px}.change{font-size:1.4rem}.measurement-meta div{grid-template-columns:1fr 1.4fr}.chart-controls{gap:8px}.chart-controls span{width:100%}.chart-controls button{padding:8px 10px}.chart{min-height:170px}th,td{padding:10px}.prose dd{overflow-wrap:anywhere}}