:root{
  --navy:#0b1f33;
  --navy-2:#173955;
  --ink:#102333;
  --muted:#6b7c89;
  --line:#d8e0e5;
  --soft:#f3f6f8;
  --white:#fff;
  --yellow:#f2c94c;
  --green:#2f855a;
  --red:#b54747;
  --radius:18px;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{background:#e9eef1}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:linear-gradient(#e9eef1,#f8fafb);min-height:100vh}
button,input,select{font:inherit}
button{cursor:pointer}
.app-shell{width:min(100%,720px);margin:0 auto;min-height:100vh;background:var(--white);padding-bottom:92px;box-shadow:0 0 30px rgba(14,33,48,.08)}
.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:18px 18px 14px;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.eyebrow,.kicker{font-size:.72rem;font-weight:800;letter-spacing:.11em;color:var(--navy-2);margin:0 0 4px}
h1,h2,h3,p{margin-top:0}h1{font-size:1.55rem;margin:0}h2{font-size:1.45rem;margin-bottom:7px}.muted{color:var(--muted);line-height:1.45}.view{display:none;padding:18px}.view.active{display:block}.hero-card{display:flex;gap:16px;justify-content:space-between;align-items:flex-start;background:var(--navy);color:#fff;padding:20px;border-radius:24px;margin-bottom:16px}.hero-card .muted{color:#d5e1e9;margin-bottom:0}.hero-card .kicker{color:var(--yellow)}.icon-btn{min-width:44px;height:44px;border-radius:50%;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.08);color:#fff;font-size:1.35rem}.section-head{margin-bottom:14px}.finder-card,.info-card,.empty-card{border:1px solid var(--line);border-radius:var(--radius);padding:16px;background:#fff}.finder-card label{display:block;font-size:.82rem;font-weight:700;margin:0 0 7px}.finder-card select,.finder-card input{width:100%;min-height:48px;border:1px solid var(--line);border-radius:12px;padding:0 13px;background:white;margin-bottom:14px;font-size:16px}.search-row{display:grid;grid-template-columns:1fr auto;gap:8px}.search-row input{margin:0}.primary,.ghost,.back-btn{min-height:44px;border-radius:12px;padding:0 14px;font-weight:750}.primary{border:0;background:var(--navy);color:#fff}.primary.full{width:100%;margin-top:14px}.ghost,.back-btn{border:1px solid var(--line);background:#fff;color:var(--ink)}.ghost.small{min-height:38px}.status{font-size:.83rem;color:var(--muted);margin-top:10px;line-height:1.35}.results-meta{font-size:.82rem;color:var(--muted);margin:16px 2px 10px}.stack{display:grid;gap:12px}.river-card{border:1px solid var(--line);border-radius:var(--radius);background:#fff;overflow:hidden}.card-top{display:flex;gap:10px;align-items:flex-start;padding:15px 15px 10px}.text-btn,.body-btn{border:0;background:transparent;text-align:left;color:inherit}.text-btn{padding:0;min-width:0;flex:1}.river-name{display:block;font-size:1rem;line-height:1.25}.river-sub{display:block;margin-top:4px;font-size:.8rem;color:var(--muted);line-height:1.3}.favorite-btn{border:1px solid var(--line);background:#fff;border-radius:12px;min-width:44px;height:44px;font-size:1.15rem;color:var(--navy)}.favorite-btn.saved{background:#fff8d8;border-color:#e8d177}.body-btn{width:100%;padding:0 15px 15px}.metrics{border-top:1px solid var(--line);padding-top:12px;display:grid;grid-template-columns:1.2fr 1fr .7fr;gap:10px}.metrics small{display:block;color:var(--muted);font-size:.72rem;margin-bottom:3px}.metrics b{font-size:.9rem}.empty-card{text-align:center;display:grid;gap:8px;color:var(--muted)}.empty-card strong{color:var(--ink)}.empty-card .primary{justify-self:center;margin-top:6px}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);z-index:20;width:min(100%,720px);display:grid;grid-template-columns:repeat(3,1fr);background:rgba(255,255,255,.97);backdrop-filter:blur(14px);border-top:1px solid var(--line);padding:8px 8px max(8px,env(safe-area-inset-bottom))}.nav-btn{border:0;background:transparent;min-height:58px;border-radius:14px;color:var(--muted);display:grid;place-items:center;font-weight:700}.nav-btn span{font-size:1.2rem}.nav-btn small{font-size:.72rem}.nav-btn.active{background:var(--soft);color:var(--navy)}.back-btn{margin-bottom:14px}.detail-hero{background:var(--navy);color:white;border-radius:24px;padding:20px}.detail-hero .sub{color:#d4e1e9;font-size:.85rem}.detail-flow{font-size:2.5rem;font-weight:850;letter-spacing:-.04em;margin:18px 0 4px}.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.detail-tile{border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:12px}.detail-tile small{display:block;color:#c7d5df;margin-bottom:4px}.chart-card{border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-top:14px}.chart-head{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:10px}.chart-wrap{min-height:190px;display:grid;align-items:center}.chart{width:100%;height:180px;overflow:visible}.chart-line{fill:none;stroke:var(--navy-2);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.chart-area{fill:#eaf1f5}.axis-line{stroke:#ccd7de;stroke-width:1}.chart-label{font-size:11px;fill:#60717d}.error{color:var(--red)}.good{color:var(--green)}
@media (min-width:620px){.view{padding:24px}.topbar{padding:20px 24px}.river-card{transition:transform .15s ease,border-color .15s ease}.river-card:hover{transform:translateY(-1px);border-color:#b8c7d0}}

.install-help{margin:12px 18px 0;border:1px solid var(--line);background:#fff8d8;border-radius:14px;padding:12px 14px;display:grid;gap:8px;font-size:.88rem}.install-help span{color:var(--muted);line-height:1.4}.install-help .ghost{justify-self:start}
.fishing-intel{margin:0 15px 10px;padding:8px 10px;border-radius:10px;font-size:.76rem;font-weight:800;line-height:1.25;background:#eef3f6;color:var(--navy-2)}
.fishing-intel.ideal{background:#e8f6ee;color:#216b46}.fishing-intel.below{background:#fff5dd;color:#8a6113}.fishing-intel.above{background:#fdeeee;color:#963c3c}.fishing-intel.curated{background:#eef3f6;color:var(--navy-2)}
.detail-range{display:grid;gap:3px;margin-top:14px;padding:11px 12px;border-radius:12px;font-size:.84rem}.detail-range span{font-size:.78rem;opacity:.88}.detail-range.ideal{background:#dff3e8;color:#154f34}.detail-range.below{background:#fff2cd;color:#6f4b08}.detail-range.above{background:#f8dede;color:#7d2f2f}