:root{--ink:#102a32;--muted:#5e747b;--blue:#0b6f83;--blue2:#084d61;--aqua:#19a5a1;--sky:#e8f6f7;--foam:#f7fbfb;--line:#d8e7e9;--amber:#da8b18;--red:#c44b3f;--green:#23886a;--white:#fff;--shadow:0 16px 45px rgba(10,62,73,.11)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font:16px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--foam)}a{color:inherit;text-decoration:none}button,input{font:inherit}.wrap{width:min(1180px,calc(100% - 36px));margin:auto}.site-header{position:sticky;top:0;z-index:30;background:rgba(247,251,251,.94);backdrop-filter:blur(15px);border-bottom:1px solid var(--line)}.nav{height:76px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:12px;font-weight:850;font-size:1.2rem;letter-spacing:-.02em}.brand-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:13px;background:linear-gradient(145deg,var(--blue),var(--aqua));color:#fff;box-shadow:0 8px 20px rgba(11,111,131,.24)}.brand-mark svg{width:25px}.nav-links{display:flex;gap:24px;margin-left:auto;color:#38545b;font-weight:650;font-size:.94rem}.nav-links a:hover{color:var(--blue)}.update-pill{display:flex;align-items:center;gap:8px;padding:8px 12px;background:#e8f7f1;border:1px solid #ccebdd;border-radius:999px;font-size:.8rem;font-weight:750;color:#1b745a}.pulse{width:8px;height:8px;background:#27a77f;border-radius:50%;box-shadow:0 0 0 5px rgba(39,167,127,.12)}
.hero{position:relative;overflow:hidden;background:linear-gradient(122deg,#073e50 0%,#0b6f83 54%,#14a4a0 100%);color:#fff;padding:72px 0 76px}.hero:after{content:"";position:absolute;right:-12%;bottom:-170px;width:680px;height:360px;border:2px solid rgba(255,255,255,.18);border-radius:50%;transform:rotate(-11deg);box-shadow:0 0 0 45px rgba(255,255,255,.04),0 0 0 90px rgba(255,255,255,.035)}.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.18fr .82fr;gap:54px;align-items:center}.eyebrow{text-transform:uppercase;letter-spacing:.15em;font-size:.76rem;font-weight:850;color:#9ee9e4}.hero h1{font-size:clamp(2.6rem,5vw,4.8rem);line-height:1.02;letter-spacing:-.055em;margin:13px 0 18px;max-width:760px}.hero p{font-size:1.12rem;color:#d6f2f2;max-width:650px;margin:0 0 30px}.search{display:flex;background:#fff;border-radius:15px;padding:7px;box-shadow:0 20px 40px rgba(0,30,40,.25);max-width:650px}.search input{min-width:0;flex:1;border:0;outline:0;padding:12px 15px;color:var(--ink);background:transparent}.search button{border:0;border-radius:11px;background:var(--amber);color:#1d2b2e;font-weight:850;padding:12px 20px;cursor:pointer}.search button:hover{filter:brightness(1.05)}.search-note{font-size:.78rem!important;color:#a8d7d8!important;margin:10px 5px 0!important}.hero-panel{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:22px;padding:24px;box-shadow:0 28px 55px rgba(1,34,44,.2)}.hero-panel-top{display:flex;justify-content:space-between;gap:15px;align-items:start}.hero-panel h2{font-size:1.15rem;margin:0}.hero-panel small{color:#bde5e4}.big-reading{font-size:3.65rem;line-height:1;font-weight:900;letter-spacing:-.06em;margin:22px 0 5px}.big-reading span{font-size:1rem;letter-spacing:0;color:#cae9e9;font-weight:650}.trend{display:inline-flex;align-items:center;gap:6px;color:#b5f0d8;font-weight:800;font-size:.85rem}.spark{height:80px;width:100%;margin-top:20px}.spark path{fill:none;stroke:#8ee5df;stroke-width:3}.spark .fill{fill:url(#grad);stroke:none}.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:16px}.hero-stat{padding:12px;background:rgba(0,0,0,.12);border-radius:12px}.hero-stat b{display:block;font-size:.95rem}.hero-stat span{font-size:.72rem;color:#bfe0e1}
.section{padding:64px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:25px}.section h2{font-size:clamp(1.8rem,3vw,2.65rem);line-height:1.1;letter-spacing:-.04em;margin:0}.section-sub{color:var(--muted);margin:8px 0 0}.source-badge{white-space:nowrap;padding:8px 11px;border:1px solid var(--line);border-radius:9px;color:var(--muted);font-size:.78rem;background:#fff}.filters{display:flex;gap:9px;flex-wrap:wrap;margin-bottom:22px}.filter{border:1px solid var(--line);background:#fff;padding:9px 14px;border-radius:999px;color:#486067;font-weight:720;cursor:pointer}.filter.active,.filter:hover{background:var(--blue);border-color:var(--blue);color:#fff}.river-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.river-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:21px;box-shadow:0 8px 24px rgba(18,63,72,.06);transition:.2s}.river-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#b8d6da}.card-head{display:flex;justify-content:space-between;gap:12px}.card-head h3{margin:0;font-size:1.08rem;line-height:1.3}.location{font-size:.79rem;color:var(--muted);margin-top:3px}.status{height:max-content;padding:5px 8px;border-radius:999px;background:#e8f7f1;color:var(--green);font-size:.68rem;font-weight:850;text-transform:uppercase;letter-spacing:.04em}.status.loading{background:#edf2f3;color:#718389}.status.unavailable{background:#fff0ed;color:var(--red)}.measure{display:flex;align-items:end;gap:8px;margin:22px 0 17px}.measure strong{font-size:2.15rem;line-height:.9;letter-spacing:-.045em}.measure span{color:var(--muted);font-size:.8rem}.metrics{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);padding-top:15px;gap:15px}.metric span{display:block;font-size:.7rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}.metric b{font-size:.88rem}.card-link{display:flex;justify-content:space-between;align-items:center;margin-top:17px;color:var(--blue);font-size:.84rem;font-weight:820}.empty{display:none;text-align:center;padding:44px;background:#fff;border-radius:18px;border:1px solid var(--line)}
.band{background:#e8f5f6;border-block:1px solid #d2e8ea}.popular-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-top:25px}.popular{background:#fff;padding:19px;border-radius:15px;border:1px solid var(--line)}.popular .num{font-size:.72rem;color:var(--aqua);font-weight:900}.popular h3{font-size:1rem;margin:7px 0 4px}.popular p{font-size:.8rem;color:var(--muted);margin:0}.explain-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:48px;align-items:start}.scale{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px}.scale-row{display:grid;grid-template-columns:90px 1fr;gap:16px;align-items:center;margin:14px 0}.scale-row b{font-size:.82rem}.bar{height:12px;border-radius:999px}.normal{background:#29a983}.action{background:#e8ad38}.minor{background:#e87b33}.major{background:#c84a43}.content h3{margin:22px 0 5px}.content p{color:var(--muted);margin:0}.disclaimer{padding:18px;border-left:4px solid var(--amber);background:#fff8e9;color:#665637;font-size:.83rem;border-radius:0 12px 12px 0;margin-top:25px}.page-hero{padding:52px 0;background:linear-gradient(120deg,#073e50,#0b778b);color:#fff}.breadcrumbs{font-size:.78rem;color:#b7dedf;margin-bottom:16px}.page-hero h1{font-size:clamp(2.2rem,5vw,4rem);letter-spacing:-.05em;line-height:1.04;margin:0 0 12px}.page-hero p{max-width:720px;color:#d3edef}.detail-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:24px}.article,.sidebar-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px}.article h2{font-size:1.7rem}.article p,.article li{color:#506970}.article li{margin:7px 0}.sidebar-card{margin-bottom:16px}.sidebar-card h3{margin-top:0}.footer{background:#082f3b;color:#c6e0e1;padding:42px 0 24px}.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:40px}.footer h3{color:#fff}.footer a{display:block;font-size:.86rem;margin:7px 0;color:#c6e0e1}.footer-bottom{border-top:1px solid rgba(255,255,255,.13);margin-top:32px;padding-top:20px;font-size:.75rem;color:#92b5b8}.mobile-menu{display:none;margin-left:auto;background:none;border:0;color:var(--ink);font-size:1.5rem}
@media(max-width:900px){.hero-grid,.explain-grid,.detail-grid{grid-template-columns:1fr}.hero-panel{max-width:590px}.river-grid{grid-template-columns:repeat(2,1fr)}.popular-grid{grid-template-columns:repeat(2,1fr)}.nav-links,.update-pill{display:none}.mobile-menu{display:block}.hero{padding:55px 0}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}
@media(max-width:620px){.wrap{width:min(100% - 24px,1180px)}.nav{height:66px}.brand-mark{width:38px;height:38px}.hero h1{font-size:2.65rem}.search{display:block}.search button{width:100%}.river-grid,.popular-grid{grid-template-columns:1fr}.section{padding:48px 0}.section-head{align-items:start;flex-direction:column}.hero-stats{grid-template-columns:1fr}.hero-panel{padding:19px}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.big-reading{font-size:3rem}}
.river-photo{margin:0 0 34px;border-radius:22px;overflow:hidden;position:relative;box-shadow:var(--shadow);height:300px}.river-photo img{width:100%;height:100%;object-fit:cover;display:block}.river-photo figcaption{position:absolute;left:18px;bottom:16px;background:rgba(5,43,53,.82);color:#fff;padding:9px 12px;border-radius:9px;font-size:.78rem;backdrop-filter:blur(8px)}