/* home.css — the 2026-10 dark showcase design, shared by / and /river-level-app */
:root{--bg:#070b14;--ink:#eef3ff;--dim:#94a3bf;--card:#0f1729;--line:rgba(255,255,255,.08);--gold:#ffc83d;--teal:#2dd4bf}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font:16px/1.6 "Plus Jakarta Sans",system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
:focus-visible{outline:2px solid var(--gold);outline-offset:3px;border-radius:6px}

/* nav */
.nav{position:sticky;top:0;z-index:40;background:rgba(7,11,20,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;height:64px;gap:26px}
.logo{display:flex;gap:10px;align-items:center;font-weight:800;font-size:18px}
.logo img{width:30px;height:30px;border-radius:8px}
.links{margin-left:auto;display:flex;gap:24px;color:var(--dim);font-weight:600;font-size:14px}
.links a:hover{color:var(--ink)}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 20px;border-radius:999px;font-weight:700;font-size:15px;transition:transform .15s}
.btn:hover{transform:translateY(-2px)}
.btn.gold{background:var(--gold);color:#111}
.btn.line{border:1.5px solid rgba(255,255,255,.25)}
.nav .btn{padding:9px 18px;font-size:14px}
.play img{height:50px;width:auto}
.msstore img{height:36px;width:auto;display:block}

/* phone frame: the screen keeps the screenshot's exact shape, nothing is cropped */
.ph{width:280px;padding:9px;border-radius:42px;background:#111827;flex:none;
  box-shadow:0 0 0 2px #2a3550,0 30px 80px rgba(0,0,0,.6),0 0 90px var(--glow,rgba(96,165,250,.18))}
.scr{position:relative;aspect-ratio:540/1138;border-radius:34px;overflow:hidden;background:#0b1020}
.scr img{position:absolute;inset:0;width:100%;height:100%;opacity:0;transition:opacity .7s ease}
.scr img.on{opacity:1}
.scr video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block;background:#0b1020}

/* hero */
.hero{position:relative;text-align:center;padding:80px 0 90px;overflow:hidden;
  background:radial-gradient(900px 520px at 50% 0%,rgba(76,110,255,.35),transparent 70%),radial-gradient(700px 400px at 85% 60%,rgba(219,39,119,.16),transparent 70%),linear-gradient(#0b1222,var(--bg))}
.pill{display:inline-flex;gap:8px;align-items:center;background:rgba(255,255,255,.05);border:1px solid var(--line);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600;color:var(--dim)}
.pill i{width:8px;height:8px;border-radius:50%;background:#ef4444;animation:ping 1.6s infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(239,68,68,.6)}70%{box-shadow:0 0 0 10px rgba(239,68,68,0)}}
h1{font-size:clamp(42px,7vw,84px);line-height:1.02;font-weight:800;letter-spacing:-.03em;margin:22px auto 18px;max-width:900px}
h1 span,.grad{background:linear-gradient(90deg,#60a5fa,#a78bfa 55%,#f472b6);-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--dim);font-size:19px;max-width:620px;margin:0 auto 30px}
.ctas{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;align-items:center}
.fan{position:relative;display:flex;justify-content:center;align-items:flex-end;margin-top:64px;height:660px}
.fan .ph{position:absolute;bottom:0;transition:transform .6s cubic-bezier(.2,.8,.2,1)}
.fan .l{transform:translateX(-290px) rotate(-10deg) translateY(-10px) scale(.9)}
.fan .r{transform:translateX(290px) rotate(10deg) translateY(-10px) scale(.9)}
.fan .m{z-index:2;width:300px}
.fan:hover .l{transform:translateX(-330px) rotate(-13deg) translateY(-24px) scale(.9)}
.fan:hover .r{transform:translateX(330px) rotate(13deg) translateY(-24px) scale(.9)}
.float{position:absolute;z-index:3;background:rgba(17,24,39,.94);border:1px solid var(--line);border-radius:16px;padding:12px 16px;font-size:13px;font-weight:700;box-shadow:0 18px 40px rgba(0,0,0,.45);text-align:left;animation:bob 5s ease-in-out infinite}
.float small{display:block;color:var(--dim);font-weight:500}
.f1{left:calc(50% - 480px);top:70px;border-color:rgba(239,68,68,.45)}.f2{right:calc(50% - 490px);top:170px;animation-delay:-2s}
@keyframes bob{50%{transform:translateY(-10px)}}

/* feature rows */
.feat{padding:110px 0;position:relative;scroll-margin-top:64px}
.feat .wrap{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.feat.flip .txt{order:2}
.feat .glow{position:absolute;inset:0;pointer-events:none;background:radial-gradient(600px 400px at var(--gx,75%) 50%,var(--tint),transparent 70%)}
.kick{letter-spacing:.25em;font-size:12px;font-weight:800;color:var(--accent);margin-bottom:12px}
.txt h2,.page-h2{font-size:clamp(34px,4.6vw,56px);line-height:1.04;letter-spacing:-.02em;font-weight:800;margin-bottom:16px}
.txt p{color:var(--dim);font-size:18px;max-width:470px}
.steps{display:flex;flex-direction:column;gap:6px;margin-top:26px;max-width:440px}
.steps button{all:unset;cursor:pointer;display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:14px;color:var(--dim);font-weight:600;font-size:15px;border:1px solid transparent;position:relative;overflow:hidden}
.steps button:focus-visible{outline:2px solid var(--gold)}
.steps button b{font-weight:600}
.steps button small{display:block;font-weight:500;font-size:13px;opacity:.8}
.steps button.on{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--ink)}
.steps button .bar{position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--accent)}
.steps button.on .bar{animation:fill var(--dur,3.6s) linear forwards}
@keyframes fill{to{width:100%}}
.steps .dot{width:10px;height:10px;border-radius:50%;border:2px solid currentColor;flex:none}
.steps button.on .dot{background:var(--accent);border-color:var(--accent)}
.stage{display:flex;justify-content:center}
.stage .ph{width:300px;--glow:var(--tint)}

/* river finder */
.finder{margin-top:28px;padding:22px;border-radius:22px;background:rgba(45,212,191,.06);border:1px solid rgba(45,212,191,.22);max-width:470px;position:relative}
.finder label{font-weight:700;font-size:14px;display:block;margin-bottom:10px}
.search{display:flex;background:#0d1424;border:1px solid rgba(255,255,255,.14);border-radius:999px;padding:5px;gap:6px}
.search:focus-within{border-color:var(--teal)}
.search input{flex:1;border:0;background:transparent;color:var(--ink);padding:10px 16px;font:inherit;outline:0;min-width:0}
.search button{border:0;background:var(--teal);color:#062a2a;font:700 14px/1 inherit;padding:0 18px;border-radius:999px;cursor:pointer}
.results{list-style:none;margin-top:10px;max-height:320px;overflow:auto;border-radius:14px}
.results:empty{display:none}
.results a{display:flex;justify-content:space-between;gap:12px;padding:10px 14px;border-bottom:1px solid var(--line);font-size:15px}
.results a:hover,.results a:focus{background:rgba(45,212,191,.08)}
.results small{color:var(--dim);white-space:nowrap}
.results .none{padding:10px 14px;color:var(--dim);font-size:14px}
.chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.chips a{background:rgba(255,255,255,.06);padding:5px 12px;border-radius:999px;font-size:13px;font-weight:600;color:var(--dim)}
.chips a:hover{color:var(--ink)}

/* states grid (river main page) */
.states{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:8px;margin-top:28px}
.states a{padding:12px 14px;border-radius:12px;background:var(--card);border:1px solid var(--line);font-weight:600;font-size:15px}
.states a:hover{border-color:rgba(45,212,191,.5);color:#fff}

/* "more in the app" + guides */
.more,.guides{padding:100px 0;text-align:center}
.guides{padding-top:20px}
.more-h{font-size:clamp(30px,4vw,48px);font-weight:800;letter-spacing:-.02em;line-height:1.08;margin:6px 0 40px}
.more-row{display:flex;flex-wrap:wrap;justify-content:center;gap:40px 28px;max-width:860px;margin:0 auto}
.more-row figure{margin:0;flex:0 0 calc((100% - 56px)/3)}
.more-row .ph{width:auto;max-width:210px;margin:0 auto;padding:7px;border-radius:30px}
.more-row .ph .scr{border-radius:24px}
.more-row figcaption{margin-top:16px;color:var(--dim);font-size:14px}
.more-row figcaption b{display:block;color:var(--ink);font-size:16px;margin-bottom:2px}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;text-align:left}
.guide-grid a{display:block;padding:20px 22px;border-radius:20px;background:var(--card);border:1px solid var(--line);transition:border-color .15s,transform .15s}
.guide-grid a:hover{border-color:rgba(125,211,252,.45);transform:translateY(-2px)}
.guide-grid b{display:block;font-size:17px;margin-bottom:6px}
.guide-grid span{color:var(--dim);font-size:14px}
.guide-all{margin-top:26px}
.guide-all a{color:#7dd3fc;font-weight:700}
/* FAQ */
.faq{padding:40px 0 60px;text-align:center}
.faq-list{max-width:820px;margin:0 auto;text-align:left;display:flex;flex-direction:column;gap:10px}
.faq details{border-radius:18px;background:var(--card);border:1px solid var(--line);padding:0 22px;transition:border-color .15s}
.faq details[open]{border-color:rgba(255,200,61,.35)}
.faq summary{cursor:pointer;list-style:none;padding:18px 30px 18px 0;font-weight:700;font-size:17px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:'+';position:absolute;right:0;top:50%;transform:translateY(-50%);font-size:24px;font-weight:500;color:var(--gold)}
.faq details[open] summary::after{content:'–'}
.faq details p{color:var(--dim);padding:0 0 18px;font-size:16px}
.final{text-align:center;padding:110px 0 120px;background:radial-gradient(700px 360px at 50% 100%,rgba(255,200,61,.12),transparent 70%)}
.final h2{font-size:clamp(36px,5vw,60px);font-weight:800;letter-spacing:-.02em;line-height:1.05;margin-bottom:12px}
footer{border-top:1px solid var(--line);padding:26px 0;font-size:14px;color:var(--dim)}
footer .wrap{display:flex;gap:22px;flex-wrap:wrap}
footer a:hover{color:var(--ink)}
footer span{margin-left:auto}

@media (max-width:1060px){.links{display:none}.nav .btn{margin-left:auto}}
@media (max-width:900px){
  .fan{height:470px}.fan .ph{width:190px;padding:7px;border-radius:30px}.fan .ph .scr{border-radius:24px}.fan .m{width:210px}
  .fan .l{transform:translateX(-120px) rotate(-9deg) scale(.88)}.fan .r{transform:translateX(120px) rotate(9deg) scale(.88)}
  .fan:hover .l{transform:translateX(-120px) rotate(-9deg) scale(.88)}.fan:hover .r{transform:translateX(120px) rotate(9deg) scale(.88)}
  .float{display:none}
  .feat{padding:70px 0}
  .feat .wrap{grid-template-columns:1fr;gap:34px}
  .feat.flip .txt{order:0}
  .stage .ph{width:min(300px,80vw)}
  .more-row{gap:28px 16px}
  .more-row figure{flex-basis:calc((100% - 16px)/2)}
  .guide-grid{grid-template-columns:1fr}
  /* phones: one swipeable row of steps right above the phone; the active one scrolls into view */
  .steps{flex-direction:row;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;max-width:none;margin:22px -24px 0;padding:0 24px;-webkit-mask-image:linear-gradient(90deg,transparent,#000 22px,#000 calc(100% - 22px),transparent);mask-image:linear-gradient(90deg,transparent,#000 22px,#000 calc(100% - 22px),transparent)}
  .steps::-webkit-scrollbar{display:none}
  .steps button{padding:8px 12px;white-space:nowrap;flex:none}.steps button small{display:none}
  footer span{margin-left:0}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}html{scroll-behavior:auto}}

/* keep the top-bar button on one line next to the phone menu button */
.nav .btn{white-space:nowrap}
@media (max-width:420px){.nav .btn{padding:8px 13px;font-size:13px}.logo{font-size:16px}}
.feat .wrap>*{min-width:0}
@media (max-width:350px){.wrap{padding:0 14px}.nav .wrap{gap:12px}.nav .btn{padding:7px 11px}}

/* home page storm sky (storm-bg.js): fixed canvas behind everything; the page
   background moves to <html> so the canvas shows through */
html:has(body.stormy){background:var(--bg)}
body.stormy{background:transparent}
.storm{position:fixed;inset:0;z-index:-1;pointer-events:none}
.storm canvas{width:100%;height:100%;display:block}
.stormy .hero{background:radial-gradient(900px 520px at 50% 0%,rgba(76,110,255,.22),transparent 70%),radial-gradient(700px 400px at 85% 60%,rgba(219,39,119,.1),transparent 70%)}