
:root{--ink:#163b4b;--blue:#075373;--paper:#f7f5ef;--sand:#eee9da;--line:#d3d8d5;--muted:#52636a;--green:#486454}*{box-sizing:border-box}body{margin:0;color:#283b43;background:#fff;font:16px/1.65 Arial,Helvetica,sans-serif}a{color:var(--blue);text-underline-offset:4px}a:hover{color:#843d20}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #aa6a19;outline-offset:4px}.wrap{max-width:1160px;margin:auto;padding:0 30px}.notice{background:var(--sand);font-size:12px;padding:7px 0;color:#42525a}.notice .wrap{display:flex;justify-content:space-between;gap:15px}.masthead{padding:27px 0 24px;display:flex;justify-content:space-between;align-items:center;gap:25px}.brand img{width:440px;max-width:100%;height:auto;display:block}.mastnote{font:italic 16px/1.5 Georgia,serif;color:var(--muted);border-left:1px solid var(--line);padding-left:24px;max-width:245px}.nav{background:var(--ink)}.nav .wrap{display:flex;align-items:stretch;gap:0}.nav a{color:white;text-decoration:none;font-size:14px;padding:15px 22px;border-bottom:3px solid transparent}.nav a:first-child{padding-left:0;padding-right:26px}.nav a[aria-current]{border-color:#b8dbe8}.nav a:hover{background:#245469}.intro{background:var(--paper);border-bottom:1px solid var(--line)}.introgrid{display:grid;grid-template-columns:1fr 280px;gap:80px;padding-top:45px;padding-bottom:44px}.eyebrow{font-size:11px;letter-spacing:1.6px;font-weight:bold;text-transform:uppercase;color:var(--green);margin:0 0 12px}h1,h2,h3{font-family:Georgia,'Times New Roman',serif;font-weight:normal;color:var(--ink)}h1{font-size:44px;line-height:1.15;letter-spacing:-.7px;margin:0 0 18px;max-width:650px}.lead{font-size:17px;line-height:1.7;max-width:650px;margin:0;color:#42575f}.intro aside{align-self:center;border-left:3px solid #a5c4cc;padding-left:22px}.intro aside h2{font-size:21px;margin:0 0 9px}.intro aside p{font-size:14px;margin:0 0 12px}.intro aside a{font-size:14px;font-weight:bold}.bodygrid{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:70px;padding-top:40px;padding-bottom:52px}h2{font-size:29px;line-height:1.25;margin:0 0 13px}.sectionhead{display:flex;align-items:baseline;justify-content:space-between;gap:16px}.sectionhead span{font-size:12px;color:var(--muted);white-space:nowrap}.sectionintro{font-size:15px;margin:0 0 22px;max-width:660px}.searchline{display:flex;align-items:center;border:1px solid #9eafb4;margin-bottom:6px;max-width:100%;height:46px}.searchline svg{margin:0 12px;flex-shrink:0}.searchline input{width:100%;border:0;background:none;color:var(--ink);font:15px Arial;padding:12px 12px 12px 0;outline-offset:0}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.plans{list-style:none;padding:0;margin:0}.plans li{border-bottom:1px solid var(--line)}.plans a{display:flex;justify-content:space-between;gap:20px;padding:12px 0;text-decoration:none;font-size:15px}.plans a:hover .name{text-decoration:underline}.plans .year{font-size:12px;color:var(--muted);white-space:nowrap}.libraryfoot{font-size:14px;margin:19px 0 0}.libraryfoot a{font-weight:bold}.sideblock{border-top:3px solid var(--ink);padding-top:17px;margin-bottom:30px}.sideblock h2{font-size:22px}.sideblock p{font-size:14px;margin:10px 0 16px}.sidelinks{list-style:none;padding:0;margin:0}.sidelinks li{border-bottom:1px solid var(--line);padding:11px 0;font-size:14px}.sidelinks a{text-decoration:none}.sidelinks a:hover{text-decoration:underline}.sideblock.official{background:var(--paper);border-top-color:var(--green);padding:18px 20px}.official a{font-size:14px;font-weight:bold}.feature{border-top:1px solid var(--line);background:var(--paper);padding:35px 0 40px}.featuregrid{display:grid;grid-template-columns:1fr 280px;gap:70px}.feature h2{font-size:28px}.feature p{font-size:15px;max-width:690px}.feature a{font-weight:bold;font-size:14px}.featureaside{border-left:1px solid #bfc9c7;padding-left:23px}.featureaside h3{font-size:21px;margin:0 0 10px}.footer{background:var(--ink);color:#e1e9e9;padding:30px 0;font-size:12px}.footergrid{display:grid;grid-template-columns:1fr 280px;gap:70px}.footer strong{font-family:Georgia,serif;font-weight:normal;color:white;font-size:21px}.footer p{max-width:690px;margin:9px 0}.footer a{color:#e1e9e9}.footerlinks{display:flex;flex-wrap:wrap;gap:9px 22px;margin-top:12px}.skip{position:absolute;left:15px;top:-60px;background:white;padding:10px;z-index:9}.skip:focus{top:5px}.article{max-width:830px;padding-top:42px;padding-bottom:60px;overflow-wrap:anywhere}.article h1{font-size:37px}.article h2{font-size:26px;margin-top:32px}.article h3{font-size:21px}.article table{border-collapse:collapse;width:100%;font-size:14px;display:block;overflow:auto}.article th,.article td{border:1px solid var(--line);padding:8px;text-align:left}.article ul{padding-left:23px}.crumb{font-size:13px;margin-bottom:20px}.empty{padding:20px 0;color:var(--muted)}
@media(max-width:850px){.introgrid,.bodygrid,.featuregrid,.footergrid{gap:35px;grid-template-columns:minmax(0,1fr) 240px}.mastnote{display:none}h1{font-size:37px}.nav a{padding:13px 14px}.brand img{width:405px}}
@media(max-width:650px){.wrap{padding-left:20px;padding-right:20px}.notice .wrap{display:block}.notice a{display:none}.masthead{padding-top:20px;padding-bottom:18px}.brand img{width:340px}.nav .wrap{flex-wrap:wrap;padding:0 13px}.nav a,.nav a:first-child{padding:10px 9px;font-size:12px}.introgrid,.bodygrid,.featuregrid,.footergrid{grid-template-columns:1fr;gap:28px}.introgrid{padding-top:30px;padding-bottom:28px}h1{font-size:35px}.lead{font-size:16px}.intro aside{margin-top:0}.bodygrid{padding-top:28px;padding-bottom:20px}.sectionhead{display:block}.sectionhead h2{margin-bottom:4px}.sectionhead span{display:block;margin-bottom:12px}.plans a{font-size:14px;gap:12px}.plans .year{font-size:11px}.featureaside{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}.article h1{font-size:30px}}

.river-photo{margin:0;align-self:center}.river-photo img{display:block;width:100%;height:270px;object-fit:cover;object-position:50% 78%}.introgrid{grid-template-columns:minmax(0,1fr) 420px;gap:50px}.photo-credit{border-top:1px solid #56717c;padding-top:18px;margin-top:22px!important;font-size:11px}.nav a:hover{text-decoration:underline}.plans .name,.sidelinks a{text-decoration:underline}.masthead{padding-left:30px;padding-right:30px}@media(max-width:850px){.introgrid{grid-template-columns:minmax(0,1fr) 300px;gap:30px}}@media(max-width:650px){.introgrid{grid-template-columns:1fr}.river-photo img{height:220px}.masthead{padding-left:20px;padding-right:20px}}
