/* ============================================================
   WalkScroll — styles.css
   Palette derived from the app's own dark, neon-themed UI
   (per Play listing: "premium neon-themed analytics", iOS: "Dark mode").
   Two semantic accents: green = movement, cyan = screen time.
   ============================================================ */

:root{
  --ink:#0a0e14;
  --panel:#111826;
  --panel-2:#0d1420;
  --line:rgba(148,178,208,.14);
  --step:#6bfb8e;         /* movement / walk */
  --step-dim:rgba(107,251,142,.14);
  --scroll:#58d5ff;       /* screen time */
  --scroll-dim:rgba(88,213,255,.13);
  --lock:#ffb963;         /* lock / warning */
  --text:#e9f0f6;
  --muted:#93a3b5;
  --radius:16px;
  --radius-s:10px;
  --maxw:1080px;
  --font-display:"Space Grotesk",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-body:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  font-size:1.0625rem;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--scroll)}
a:hover{color:var(--step)}
:focus-visible{outline:3px solid var(--step);outline-offset:3px;border-radius:4px}

h1,h2,h3{font-family:var(--font-display);line-height:1.15;letter-spacing:-.015em;margin:0 0 .5em}
h1{font-size:clamp(2.1rem,5.5vw,3.4rem);font-weight:700}
h2{font-size:clamp(1.55rem,3.5vw,2.2rem);font-weight:700}
h3{font-size:1.15rem;font-weight:600}
p{margin:0 0 1em}
.muted{color:var(--muted)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.25rem}
section{padding:4.5rem 0}
.eyebrow{
  font-family:var(--font-display);
  font-size:.8rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--step);margin-bottom:.75rem;display:block;
}
.eyebrow--cyan{color:var(--scroll)}
.eyebrow--amber{color:var(--lock)}

/* ---------- Skip link ---------- */
.skip-link{
  position:absolute;left:1rem;top:-4rem;z-index:100;
  background:var(--step);color:#04220d;font-weight:700;
  padding:.6rem 1rem;border-radius:8px;transition:top .15s;
}
.skip-link:focus{top:1rem}

/* ---------- Header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(10,14,20,.88);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:1rem;min-height:64px}
.brand{
  display:flex;align-items:center;gap:.6rem;
  font-family:var(--font-display);font-weight:700;font-size:1.1rem;
  color:var(--text);text-decoration:none;
}
.brand img{width:34px;height:34px;border-radius:8px}
.nav-links{display:flex;gap:1.4rem;list-style:none;margin:0 0 0 auto;padding:0}
.nav-links a{
  color:var(--muted);text-decoration:none;font-size:.95rem;font-weight:500;
}
.nav-links a:hover{color:var(--text)}
.nav-cta{margin-left:1rem}
.nav-toggle{
  display:none;margin-left:auto;
  background:none;border:1px solid var(--line);border-radius:8px;
  color:var(--text);padding:.5rem .7rem;font-size:1.1rem;cursor:pointer;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  font-family:var(--font-display);font-weight:600;font-size:1rem;
  padding:.85rem 1.5rem;border-radius:999px;text-decoration:none;
  border:1px solid transparent;transition:transform .12s,box-shadow .12s;
  min-height:48px;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{
  background:linear-gradient(100deg,var(--step),#4fe07c);
  color:#04220d;
  box-shadow:0 0 24px rgba(107,251,142,.25);
}
.btn-primary:hover{color:#04220d;box-shadow:0 0 34px rgba(107,251,142,.4)}
.btn-secondary{
  background:transparent;color:var(--text);border-color:var(--line);
}
.btn-secondary:hover{border-color:var(--scroll);color:var(--scroll)}
.btn-small{padding:.55rem 1.1rem;font-size:.9rem;min-height:40px}

.store-badges{display:flex;flex-wrap:wrap;gap:.75rem;margin:1.4rem 0 .75rem}
.store-badge{
  display:inline-flex;flex-direction:column;justify-content:center;
  padding:.55rem 1.3rem;border-radius:12px;text-decoration:none;
  border:1px solid var(--line);background:var(--panel);
  color:var(--text);line-height:1.25;min-height:52px;
  transition:border-color .12s,transform .12s;
}
.store-badge:hover{border-color:var(--step);color:var(--text);transform:translateY(-1px)}
.store-badge small{font-size:.68rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.store-badge strong{font-family:var(--font-display);font-size:1rem}

/* ---------- Hero ---------- */
.hero{
  padding:4.5rem 0 3.5rem;
  background:
    radial-gradient(60rem 30rem at 15% -10%,var(--step-dim),transparent 60%),
    radial-gradient(50rem 28rem at 95% 10%,var(--scroll-dim),transparent 60%);
  border-bottom:1px solid var(--line);
}
.hero .wrap{display:grid;grid-template-columns:1.15fr .85fr;gap:3rem;align-items:center}
.hero h1 .hl-step{color:var(--step)}
.hero h1 .hl-scroll{color:var(--scroll)}
.hero-sub{font-size:1.15rem;color:var(--muted);max-width:34rem}
.hero-note{font-size:.9rem;color:var(--muted)}

/* Signature element: the earn loop */
.loop{
  display:flex;align-items:center;gap:0;flex-wrap:wrap;
  margin:2rem 0 0;padding:0;list-style:none;
  font-family:var(--font-display);font-size:.85rem;font-weight:600;
}
.loop li{display:flex;align-items:center}
.loop .node{
  padding:.45rem .95rem;border-radius:999px;border:1px solid var(--line);
  background:var(--panel);white-space:nowrap;
}
.loop .node--walk{border-color:rgba(107,251,142,.5);color:var(--step)}
.loop .node--earn{border-color:rgba(107,251,142,.3)}
.loop .node--scroll{border-color:rgba(88,213,255,.5);color:var(--scroll)}
.loop .node--lock{border-color:rgba(255,185,99,.45);color:var(--lock)}
.loop .link{
  width:1.6rem;height:1px;flex:none;
  background-image:linear-gradient(90deg,var(--muted) 55%,transparent 55%);
  background-size:6px 1px;
  position:relative;
}
.loop .link::after{
  content:"";position:absolute;right:-1px;top:-2.5px;
  border-left:5px solid var(--muted);
  border-top:3px solid transparent;border-bottom:3px solid transparent;
}
.loop .link--back{background:none}
.loop .link--back::after{display:none}
.loop .back-label{font-size:.72rem;color:var(--muted);font-weight:500;padding-left:.5rem}

/* Phone mockup */
.phone{
  width:min(300px,80vw);margin:0 auto;
  border:1px solid var(--line);border-radius:38px;
  padding:12px;background:var(--panel-2);
  box-shadow:0 30px 80px rgba(0,0,0,.55),0 0 60px rgba(88,213,255,.08);
}
.phone img{border-radius:26px;width:100%}

/* ---------- Problem / solution ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:2.5rem;align-items:start}
.panel{
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:1.8rem;
}
.panel--problem{border-left:3px solid var(--lock)}
.panel--solution{border-left:3px solid var(--step)}
.panel ul{margin:.5rem 0 0;padding-left:1.2rem}
.panel li{margin-bottom:.55rem}

/* ---------- Feature grid ---------- */
.grid{display:grid;gap:1.25rem}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:1.5rem;
}
.card h3{margin-top:.2rem}
.card .tag{
  display:inline-block;font-family:var(--font-display);font-size:.7rem;
  font-weight:600;letter-spacing:.08em;text-transform:uppercase;
  padding:.2rem .6rem;border-radius:999px;margin-bottom:.7rem;
}
.tag--ios{background:var(--scroll-dim);color:var(--scroll)}
.tag--android{background:var(--step-dim);color:var(--step)}
.tag--both{background:rgba(255,185,99,.12);color:var(--lock)}
.card p:last-child{margin-bottom:0}
.card--icon .icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:var(--panel-2);border:1px solid var(--line);
  font-size:1.3rem;margin-bottom:.9rem;
}

/* ---------- Steps (how it works) ---------- */
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem;padding:0;margin:2rem 0 0;list-style:none}
.steps li{
  counter-increment:step;position:relative;
  background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:1.4rem;
}
.steps li::before{
  content:counter(step);
  font-family:var(--font-display);font-weight:700;font-size:.95rem;
  display:grid;place-items:center;width:32px;height:32px;border-radius:999px;
  background:var(--step-dim);color:var(--step);margin-bottom:.8rem;
}
.steps h3{font-size:1.02rem}
.steps p{font-size:.95rem;color:var(--muted);margin:0}

/* ---------- Screenshots ---------- */
.shots{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1.25rem;margin-top:2rem;
}
.shots figure{margin:0}
.shots img{
  border-radius:var(--radius-s);border:1px solid var(--line);
  background:var(--panel-2);width:100%;aspect-ratio:9/16;object-fit:cover;
}
.shots figcaption{font-size:.86rem;color:var(--muted);margin-top:.6rem;line-height:1.45}

/* ---------- Use cases ---------- */
.usecase h3{color:var(--step)}
.usecase .who{font-size:.85rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-family:var(--font-display)}
.usecase a{font-weight:600}

/* ---------- Guides ---------- */
.guide-card{display:flex;flex-direction:column}
.guide-card .intent{
  font-size:.75rem;font-family:var(--font-display);letter-spacing:.08em;
  text-transform:uppercase;color:var(--scroll);margin-bottom:.5rem;
}
.guide-card p{flex:1}
.guide-card a{font-weight:600;text-decoration:none}
.guide-card a:hover{text-decoration:underline}

/* ---------- FAQ ---------- */
.faq{max-width:52rem}
.faq details{
  border:1px solid var(--line);border-radius:var(--radius-s);
  background:var(--panel);margin-bottom:.75rem;padding:0 1.25rem;
}
.faq summary{
  cursor:pointer;font-family:var(--font-display);font-weight:600;
  padding:1rem 0;list-style:none;position:relative;padding-right:2rem;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:.2rem;top:50%;transform:translateY(-50%);
  color:var(--step);font-size:1.3rem;font-weight:400;
}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);padding-bottom:1.1rem;margin:0}
.faq details p + p{padding-top:0;margin-top:-.4rem}

/* ---------- Final CTA ---------- */
.final-cta{
  text-align:center;
  background:
    radial-gradient(45rem 22rem at 50% 120%,var(--step-dim),transparent 70%);
  border-top:1px solid var(--line);
}
.final-cta .store-badges{justify-content:center}

/* ---------- Footer ---------- */
.site-footer{
  border-top:1px solid var(--line);padding:2.5rem 0 3rem;
  font-size:.92rem;color:var(--muted);
}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem}
.site-footer h3{font-size:.85rem;text-transform:uppercase;letter-spacing:.1em;color:var(--text)}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li{margin-bottom:.5rem}
.site-footer a{color:var(--muted);text-decoration:none}
.site-footer a:hover{color:var(--step)}
.footer-bottom{margin-top:2rem;padding-top:1.25rem;border-top:1px solid var(--line);font-size:.85rem}

/* ---------- Guide article pages ---------- */
.breadcrumbs{font-size:.85rem;color:var(--muted);padding:1.25rem 0 0}
.breadcrumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;margin:0;padding:0}
.breadcrumbs li+li::before{content:"/";margin-right:.4rem;color:var(--line)}
.breadcrumbs a{color:var(--muted);text-decoration:none}
.breadcrumbs a:hover{color:var(--step)}
.article{max-width:46rem;padding-top:2.5rem}
.article header{margin-bottom:2rem}
.article h2{margin-top:2.4rem}
.article h3{margin-top:1.8rem}
.article ul,.article ol{padding-left:1.3rem}
.article li{margin-bottom:.5rem}
.article .lede{font-size:1.18rem;color:var(--muted)}
.callout{
  border:1px solid rgba(107,251,142,.35);border-radius:var(--radius);
  background:var(--step-dim);padding:1.3rem 1.5rem;margin:2rem 0;
}
.callout--tip{border-color:rgba(88,213,255,.35);background:var(--scroll-dim)}
.callout h3{margin-top:0}
.callout p:last-child{margin-bottom:0}
.article .cta-block{
  text-align:center;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--panel);padding:2rem;margin:2.5rem 0;
}
.article .cta-block .store-badges{justify-content:center}
.related{margin-top:3rem}

/* ---------- 404 ---------- */
.page-404{min-height:55vh;display:grid;place-items:center;text-align:center}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .hero .wrap{grid-template-columns:1fr;gap:2.5rem}
  .grid-3,.steps,.shots{grid-template-columns:repeat(2,1fr)}
  .split,.grid-2{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  section{padding:3.25rem 0}
  .nav-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:64px;left:0;right:0;
    flex-direction:column;gap:0;background:var(--ink);
    border-bottom:1px solid var(--line);padding:.5rem 1.25rem 1rem;
  }
  .nav-links.open{display:flex}
  .nav-links li{padding:.55rem 0}
  .nav-cta{display:none}
  .steps,.shots,.grid-3{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .loop .link{width:1rem}
}