:root{--ink:#10232d;--muted:#597079;--river:#0a607a;--river-deep:#073849;--teal:#36a8a9;--sky:#d8eef1;--paper:#f7f6f1;--white:#fff;--gold:#c89d53;--line:#d8e0dd;--shadow:0 18px 50px rgba(5,45,61,.12);--sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;--serif:var(--sans)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.68}a{color:var(--river);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{color:#063342}.container{width:min(1180px,calc(100% - 40px));margin-inline:auto}.skip-link{position:fixed;left:1rem;top:-5rem;z-index:100;background:#fff;padding:.7rem 1rem}.skip-link:focus{top:1rem}.announcement{background:var(--river-deep);color:#dcebed;font-size:.82rem;letter-spacing:.02em}.announcement .container{display:flex;align-items:center;gap:1.1rem;min-height:38px}.announcement span{text-transform:uppercase;color:#77d1d0;font-weight:800;letter-spacing:.12em}.announcement a{margin-left:auto;color:#fff}.site-header{position:sticky;top:0;z-index:30;background:rgba(247,246,241,.94);border-bottom:1px solid rgba(14,65,80,.12);backdrop-filter:blur(14px)}.site-header__inner{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:2rem}.brand{display:inline-flex;gap:.75rem;align-items:center;color:var(--ink);text-decoration:none}.brand__mark{display:grid;place-items:center;width:42px;height:42px;border-radius:50%;background:var(--river);color:#fff;font-family:var(--serif);font-size:1.45rem;font-weight:700;box-shadow:inset 0 -3px 0 rgba(0,0,0,.12)}.brand strong{display:block;font-family:var(--serif);font-size:1.34rem;line-height:1}.brand small{display:block;margin-top:.3rem;color:var(--muted);font-size:.64rem;text-transform:uppercase;letter-spacing:.1em}.site-nav{display:flex;align-items:center;gap:.2rem}.site-nav a{padding:.55rem .68rem;border-radius:6px;color:#243b43;font-weight:650;font-size:.88rem;text-decoration:none;white-space:nowrap}.site-nav a:hover,.site-nav a[aria-current=page]{background:#dbe9e9;color:var(--river-deep)}.site-nav a[aria-current=page]{box-shadow:inset 0 -2px 0 var(--teal)}.nav-toggle{display:none;border:0;background:transparent}.hero{position:relative;isolation:isolate;min-height:640px;display:grid;align-items:center;color:#fff;overflow:hidden}.hero__image{position:absolute;inset:0;z-index:-3;background:var(--river-deep) center 56%/cover no-repeat;transform:scale(1.01)}.hero__overlay{position:absolute;inset:0;z-index:-2;background:linear-gradient(90deg,rgba(3,33,46,.95) 0%,rgba(4,50,65,.72) 48%,rgba(6,44,57,.2) 100%),linear-gradient(0deg,rgba(4,36,48,.85),transparent 48%)}.hero:after{content:"";position:absolute;left:-10%;right:-10%;bottom:-77px;height:150px;background:var(--paper);border-radius:50% 50% 0 0/28% 28% 0 0;z-index:-1}.hero__content{padding:95px 0 135px}.eyebrow{margin:0 0 1rem;color:#73d7d4;font-size:.77rem;text-transform:uppercase;font-weight:800;letter-spacing:.18em}.hero h1,.page-hero h1{max-width:840px;margin:.2rem 0 1rem;font-family:var(--serif);font-size:clamp(3.15rem,7vw,6.25rem);line-height:.94;letter-spacing:-.045em}.hero__lead{max-width:660px;font-family:var(--serif);font-size:1.32rem;line-height:1.5;color:#e6f1f1}.hero__facts{display:flex;gap:0;margin:2rem 0 2.2rem;flex-wrap:wrap}.hero__facts span{padding:.45rem 1.25rem;border-left:1px solid rgba(255,255,255,.35);font-size:.88rem;font-weight:700}.hero__facts span:first-child{padding-left:0;border-left:0}.hero__actions{display:flex;gap:.85rem;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;padding:.8rem 1.2rem;border-radius:5px;text-decoration:none;font-weight:750;font-size:.9rem}.button--light{background:#fff;color:var(--river-deep);box-shadow:var(--shadow)}.button--ghost{border:1px solid rgba(255,255,255,.55);color:#fff;background:rgba(3,34,45,.2)}.button:hover{transform:translateY(-1px)}.page-hero{padding:84px 0 76px;background:radial-gradient(circle at 78% 15%,rgba(89,188,188,.3),transparent 26%),linear-gradient(135deg,#082f40,#0b6175);color:#fff;position:relative;overflow:hidden}.page-hero:after{content:"Large Asian Rivers";position:absolute;right:2%;bottom:-.25em;font:800 11rem/1 var(--serif);color:rgba(255,255,255,.035);letter-spacing:-.05em}.page-hero h1{font-size:clamp(2.7rem,6vw,5.3rem);margin:.2rem 0 .8rem}.page-hero p:last-child{max-width:720px;color:#d7e7e8;font-family:var(--serif);font-size:1.2rem}.prose{max-width:920px;padding-top:76px;padding-bottom:105px}.hero+.prose{padding-top:30px}.prose>h1:first-child{display:none}.prose h2,.prose h3,.prose h4{font-family:var(--serif);color:#123844;line-height:1.2;scroll-margin-top:110px;position:relative}.prose h2{font-size:2.35rem;margin:3.6rem 0 1.2rem;padding-bottom:.7rem;border-bottom:1px solid var(--line)}.prose h3{font-size:1.5rem;margin:2.35rem 0 .75rem}.prose h4{font-size:1.1rem;margin:1.8rem 0 .5rem}.anchor{opacity:0;margin-left:.4rem;font:400 .8em var(--sans);text-decoration:none}.prose h2:hover .anchor,.prose h3:hover .anchor,.anchor:focus{opacity:.45}.prose p{margin:0 0 1.25rem}.prose strong{color:#183f4d}.prose ul,.prose ol{padding-left:1.35rem}.prose li{padding:.22rem 0}.prose blockquote{margin:2rem 0;padding:1.1rem 1.4rem;border-left:4px solid var(--teal);background:#e7f1f0;color:#2f5059;font-family:var(--serif);font-size:1.08rem}.prose hr{border:0;border-top:1px solid var(--line);margin:3rem 0}.prose img{display:block;max-width:100%;height:auto;border-radius:8px;box-shadow:var(--shadow);margin:2rem auto}.table-wrap{overflow-x:auto;margin:1.5rem 0 2.5rem;border:1px solid var(--line);border-radius:8px;background:#fff}.prose table{border-collapse:collapse;width:100%;min-width:620px;font-size:.93rem}.prose th,.prose td{text-align:left;padding:.9rem 1rem;border-bottom:1px solid var(--line);vertical-align:top}.prose th{background:#e4efee;color:#123c48;font-size:.75rem;text-transform:uppercase;letter-spacing:.08em}.prose tr:last-child td{border-bottom:0}.lead{font-family:var(--serif);font-size:1.25rem;line-height:1.62;color:#38545d}.section-intro{font-family:var(--serif);font-size:1.17rem;color:#50666e;max-width:760px}.notice{margin:2.2rem 0;padding:1.25rem 1.5rem;border-left:4px solid var(--gold);background:#f4ead7;border-radius:0 6px 6px 0}.notice h3{margin-top:0}.fact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin:2rem 0}.fact-card,.card{padding:1.45rem;border:1px solid var(--line);border-radius:8px;background:#fff;box-shadow:0 6px 24px rgba(6,48,62,.06)}.fact-card small{display:block;margin-bottom:.35rem;color:var(--river);font-weight:800;text-transform:uppercase;letter-spacing:.1em;font-size:.68rem}.fact-card strong{display:block;font:700 1.25rem/1.25 var(--serif)}.card-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1.1rem;margin:1.5rem 0}.card h3{margin:.15rem 0 .7rem;font-size:1.25rem}.card p:last-child{margin-bottom:0}.card--accent{background:var(--river-deep);color:#edf5f5;border-color:transparent}.card--accent h3,.card--accent strong{color:#fff}.profile-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem}.profile{padding:1.25rem 1.35rem;border-top:3px solid var(--teal);background:#fff;box-shadow:0 5px 20px rgba(4,51,66,.06)}.profile h3{font-size:1.13rem;margin:0 0 .35rem}.profile p{font-size:.9rem;color:var(--muted);margin:.35rem 0}.timeline{list-style:none!important;padding:0!important;margin:2rem 0!important;counter-reset:item}.timeline li{position:relative;padding:0 0 1.6rem 3rem!important;border-left:1px solid #a6c5c7;margin-left:.8rem}.timeline li:before{counter-increment:item;content:counter(item);position:absolute;left:-.85rem;top:-.1rem;width:1.65rem;height:1.65rem;border-radius:50%;display:grid;place-items:center;background:var(--river);color:#fff;font-size:.72rem;font-weight:800}.timeline li:last-child{border-left-color:transparent}.timeline strong{display:block}.river-index{background:#dcebea;border-top:1px solid #c3dbda;border-bottom:1px solid #c3dbda}.river-index .container{display:flex;align-items:center;justify-content:center;gap:.55rem 1.4rem;flex-wrap:wrap;padding:1rem 0;color:#416068;font:italic .88rem var(--serif)}.river-index span:not(:last-child):after{content:"·";margin-left:1.4rem;color:#7ea7a6}.site-footer{background:#092f3f;color:#bdd0d3;padding:65px 0 20px}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1.5fr;gap:4rem}.brand--footer{color:#fff}.brand--footer small{color:#9ebcc0}.footer-grid p{max-width:440px;font-family:var(--serif)}.footer-grid h2{margin:.25rem 0 .9rem;color:#fff;font:700 1rem var(--serif)}.footer-grid>div>a:not(.brand){display:block;color:#bedadd;margin:.4rem 0;font-size:.88rem}.footer-bottom{display:flex;justify-content:space-between;gap:2rem;margin-top:55px;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);font-size:.72rem;color:#85a6ac}.muted{color:var(--muted)}.tag{display:inline-flex;padding:.22rem .55rem;margin:.15rem;border-radius:999px;background:#dcebea;color:#1d555f;font-size:.75rem;font-weight:750}.archive-link{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;padding:1rem 0;border-bottom:1px solid var(--line)}.archive-link strong{font:700 1.15rem var(--serif)}.archive-link span{color:var(--muted);font-size:.85rem}.contact-box{padding:1.5rem;background:#fff;border:1px solid var(--line);border-radius:8px}.contact-box a{word-break:break-word}
@media(max-width:980px){.site-nav{display:none;position:absolute;left:20px;right:20px;top:75px;flex-direction:column;align-items:stretch;padding:.8rem;background:#fff;box-shadow:var(--shadow);border-radius:8px}.site-nav.is-open{display:flex}.nav-toggle{display:grid;width:44px;height:44px;padding:9px;align-content:center;gap:5px}.nav-toggle span{display:block;height:2px;background:var(--river-deep)}.nav-toggle b{position:absolute;width:1px;height:1px;overflow:hidden}.brand small{display:none}.hero{min-height:590px}.hero__content{padding-top:75px}.footer-grid{grid-template-columns:1.5fr 1fr;gap:2.5rem}.footer-grid>div:last-child{grid-column:1/-1}}
@media(max-width:700px){body{font-size:16px}.container{width:min(100% - 28px,1180px)}.announcement .container{min-height:44px}.announcement span{display:none}.announcement strong{font-size:.76rem}.site-header__inner{min-height:70px}.site-nav{top:65px}.hero{min-height:650px}.hero:after{display:none}.hero__content{padding:64px 0 75px}.hero h1{font-size:3rem}.hero__facts{display:grid;gap:.45rem}.hero__facts span{padding:.12rem 0;border:0}.hero__actions{display:grid}.page-hero{padding:60px 0}.prose{padding:50px 0 75px}.prose h2{font-size:1.85rem}.fact-grid,.card-grid,.profile-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr;gap:2rem}.footer-grid>div:last-child{grid-column:auto}.footer-bottom{flex-direction:column;gap:.35rem}.river-index span:not(:last-child):after{display:none}.page-hero:after{font-size:7rem}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button:hover{transform:none}}


/* Refined navigation for the Large Asian Rivers */
.brand__mark{display:block;width:48px;height:48px;border-radius:50%;object-fit:cover;background:#fff;box-shadow:0 5px 14px rgba(5,54,69,.16)}
.site-header{background:rgba(247,246,241,.95);backdrop-filter:blur(16px)}
.site-header__inner{min-height:86px;gap:1.5rem}
.brand__mark{background:linear-gradient(145deg,var(--river),var(--river-deep));box-shadow:inset 0 -3px 0 rgba(0,0,0,.12),0 5px 14px rgba(5,54,69,.15)}
.site-nav{display:flex;align-items:center;gap:.22rem;padding:.32rem;border:1px solid rgba(12,83,101,.13);border-radius:999px;background:rgba(255,255,255,.82);box-shadow:0 8px 24px rgba(7,56,73,.08)}
.site-nav a{position:relative;padding:.62rem .72rem;border:1px solid transparent;border-radius:999px;color:#29444d;font-weight:720;font-size:.82rem;line-height:1;text-decoration:none;white-space:nowrap;transition:background-color .18s ease,color .18s ease,box-shadow .18s ease,transform .18s ease,border-color .18s ease}
.site-nav a:hover{background:#e6f1f0;border-color:#c9dfdd;color:var(--river-deep);transform:translateY(-1px)}
.site-nav a[aria-current=page]{background:linear-gradient(135deg,var(--river-deep),var(--river));border-color:transparent;color:#fff;box-shadow:0 6px 16px rgba(6,70,87,.2)}
.site-nav a.nav-link--accent:not([aria-current=page]){background:#dff1ef;border-color:#b8dcd8;color:#075468}
.site-nav a.nav-link--accent:not([aria-current=page]):hover{background:#cfe9e6;color:#063f50}
.nav-toggle{border:1px solid rgba(10,96,122,.2);border-radius:12px;background:#fff;box-shadow:0 6px 18px rgba(7,56,73,.08)}

@media(max-width:1120px){
  .site-nav{display:none;position:absolute;left:20px;right:20px;top:78px;flex-direction:column;align-items:stretch;gap:.35rem;padding:.72rem;border-radius:18px;background:rgba(255,255,255,.98);box-shadow:0 22px 55px rgba(5,45,61,.2)}
  .site-nav.is-open{display:flex}
  .site-nav a{padding:.85rem 1rem;border-radius:12px;font-size:.92rem}
  .site-nav a[aria-current=page]{box-shadow:none}
  .nav-toggle{display:grid;width:46px;height:46px;padding:10px;align-content:center;gap:5px;cursor:pointer}
  .nav-toggle span{display:block;height:2px;border-radius:2px;background:var(--river-deep);transition:transform .18s ease,opacity .18s ease}
  .nav-toggle[aria-expanded=true] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .nav-toggle[aria-expanded=true] span:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded=true] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .nav-toggle b{position:absolute;width:1px;height:1px;overflow:hidden}
  .brand small{display:none}
}

@media(max-width:700px){
  .announcement .container{gap:.6rem}
  .announcement strong{font-size:.72rem;line-height:1.25}
  .announcement a{font-size:.72rem;white-space:nowrap}
  .site-header__inner{min-height:72px}
  .site-nav{top:66px;left:14px;right:14px}
}