/* ============================================================
   AeroVRC website — reproduces the app's own painted look:
   deep-navy aurora + drifting sparkles, solid cards with lit
   edges, glossy azure->violet buttons with a glowing rim, and
   the animated orb "A" logo.
   ============================================================ */
:root{
  --bg:#0d1022;        --bg-top:#151a34;    --surface:#141832;
  --card:#191e3a;      --card-top:#22284c;
  --accent:#4a9cff;    --accent-hi:#82c6ff; --accent2:#8476ff;  --deep:#1c5cc8;
  --text:#e7ebf5;      --muted:#96a2c6;
  --border:#323a68;    --border-hi:#5c70b6;
  --success:#4aca8e;   --danger:#f06672;    --warning:#f2b24a;
  --nav:#0b0d1c;       --input:#161a32;
  --font:"Segoe UI","Segoe UI Variable",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
  --font-semi:"Segoe UI Semibold","Segoe UI",system-ui,sans-serif;
  /* the lit-edge recipe every card/panel shares (top highlight + side rails + bottom shade) */
  --lit:inset 0 1px 0 rgba(255,255,255,.05),
        inset 1px 0 0 rgba(92,112,182,.10),
        inset -1px 0 0 rgba(92,112,182,.10),
        inset 0 -1px 0 rgba(0,0,0,.22);
  --float:0 20px 55px -24px rgba(0,0,0,.75);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;position:relative;
  font-family:var(--font);color:var(--text);
  background-color:var(--bg);
  /* aurora wash: soft azure top-right + violet top-left over deep navy */
  background-image:
    radial-gradient(1200px 620px at 82% -12%, rgba(74,156,255,.16), transparent 60%),
    radial-gradient(980px 560px at 2% 4%, rgba(132,118,255,.13), transparent 55%),
    linear-gradient(180deg,var(--bg-top),var(--bg) 42%);
  background-attachment:fixed;
  line-height:1.6;-webkit-font-smoothing:antialiased;
}

/* sparkle canvas sits behind everything, pinned to the viewport */
#sparkles{position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
body > *:not(#sparkles):not(svg){position:relative;z-index:1}

a{color:inherit;text-decoration:none}
h1,h2,h3,h4{line-height:1.15;margin:0;font-family:var(--font-semi)}
code{
  font-family:Consolas,"SFMono-Regular",Menlo,monospace;
  background:rgba(74,156,255,.12);border:1px solid var(--border);
  padding:.08em .4em;border-radius:6px;font-size:.9em;color:var(--accent-hi);
}
.grad{background:linear-gradient(100deg,var(--accent-hi),var(--accent2));
  -webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- orb logo ---------- */
.orb{display:inline-block;line-height:0;filter:drop-shadow(0 2px 6px rgba(28,92,200,.55))}
.orb-xs{width:18px;height:18px}
.orb-sm{width:30px;height:30px}
.orb-lg{width:96px;height:96px}
.orb-halo{
  position:absolute;width:260px;height:260px;border-radius:50%;pointer-events:none;
  background:radial-gradient(circle,rgba(74,156,255,.5),rgba(74,156,255,0) 68%);
  filter:blur(6px);animation:breathe 5s ease-in-out infinite;z-index:0;
}
.orb-halo.dl{width:220px;height:220px;top:-14px;left:50%;transform:translateX(-50%)}
@keyframes breathe{0%,100%{opacity:.55;transform:scale(1)}50%{opacity:.9;transform:scale(1.08)}}
.orb-halo.dl{animation-name:breathe-dl}
@keyframes breathe-dl{0%,100%{opacity:.5;transform:translateX(-50%) scale(1)}50%{opacity:.85;transform:translateX(-50%) scale(1.08)}}

/* ---------- buttons ---------- */
.btn{
  position:relative;overflow:hidden;isolation:isolate;
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;font-family:var(--font-semi);
  font-weight:600;border-radius:9px;cursor:pointer;border:0;white-space:nowrap;
  transition:transform .2s cubic-bezier(.2,.7,.2,1), box-shadow .25s ease, filter .2s ease, background-color .25s ease;
}
.btn:focus-visible{outline:2px solid var(--accent-hi);outline-offset:3px}
/* a diagonal highlight that sweeps across the button on hover */
.btn::before{content:"";position:absolute;top:0;bottom:0;left:-130%;width:55%;z-index:0;pointer-events:none;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.32),transparent);
  transform:skewX(-18deg);transition:left .6s cubic-bezier(.3,.5,.3,1)}
.btn:hover::before{left:155%}
.btn:active{transform:translateY(1px) scale(.985)}
.btn-primary{
  color:#fff;
  background:linear-gradient(118deg,#5ba6ff 0%,var(--accent) 42%,var(--accent2) 100%);
  background-size:175% 175%;animation:btnSheen 7s ease-in-out infinite;
  box-shadow:
    0 0 0 1.3px rgba(174,214,255,.6) inset,   /* glowing rim */
    0 1px 0 rgba(255,255,255,.35) inset,      /* top highlight */
    0 12px 28px -10px rgba(74,156,255,.8);    /* accent glow */
}
.btn-primary:hover{transform:translateY(-2px);filter:brightness(1.08);
  box-shadow:0 0 0 1.3px rgba(200,228,255,.8) inset,0 1px 0 rgba(255,255,255,.45) inset,0 20px 42px -12px rgba(74,156,255,1)}
.btn-primary:active{transform:translateY(0) scale(.99);filter:brightness(.95)}
@keyframes btnSheen{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
.btn-sm{padding:.55em 1.05em;font-size:.92rem}
.btn-lg{padding:.9em 1.6em;font-size:1.05rem}
/* secondary button — mirrors the app's flat BtnBg control (subtle 3D + border) */
.btn-secondary{
  color:var(--text);
  background:linear-gradient(180deg,#323c6e,#2a3260);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.09),0 1px 0 rgba(0,0,0,.25),0 8px 22px -14px rgba(0,0,0,.8);
  border:1px solid var(--border-hi);
}
.btn-secondary:hover{transform:translateY(-2px);background:linear-gradient(180deg,#3a4578,#313a6c);border-color:#6b7fc0}
.btn-secondary:active{transform:translateY(0);filter:brightness(.96)}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(11,13,28,.75);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border);
  transition:background .3s ease, box-shadow .3s ease, border-color .3s ease}
.nav.scrolled{background:rgba(11,13,28,.92);border-bottom-color:var(--border-hi);
  box-shadow:0 8px 30px -16px rgba(0,0,0,.8)}
.nav-inner{max-width:1120px;margin:0 auto;padding:.7rem 1.25rem;display:flex;align-items:center;gap:1.25rem;
  transition:padding .3s ease}
.nav.scrolled .nav-inner{padding-top:.5rem;padding-bottom:.5rem}
.brand{display:flex;align-items:center;gap:.6rem;transition:transform .2s ease}
.brand:hover{transform:translateY(-1px)}
.brand .orb{transition:transform .5s cubic-bezier(.2,.7,.2,1),filter .3s ease}
.brand:hover .orb{transform:rotate(8deg) scale(1.08);filter:drop-shadow(0 2px 10px rgba(74,156,255,.85))}
.brand-name{font-family:var(--font-semi);font-weight:700;font-size:1.1rem;letter-spacing:.2px}
.nav-links{display:flex;gap:1.4rem;margin-left:auto;font-size:.95rem;color:var(--muted)}
.nav-links a{position:relative;padding:.2rem 0;transition:color .2s ease}
.nav-links a::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--accent),var(--accent2));transform:scaleX(0);transform-origin:left;
  transition:transform .25s cubic-bezier(.2,.7,.2,1)}
.nav-links a:hover{color:var(--text)}
.nav-links a:hover::after{transform:scaleX(1)}

/* ---------- hero ---------- */
.hero{padding:4.5rem 1.25rem 1rem;text-align:center;overflow:hidden}
.hero-inner{max-width:820px;margin:0 auto;display:flex;flex-direction:column;align-items:center}
.pill{display:inline-flex;align-items:center;gap:.5em;font-size:.82rem;font-weight:600;color:var(--accent-hi);
  background:rgba(74,156,255,.1);border:1px solid var(--border-hi);padding:.35em .85em;border-radius:999px;margin-bottom:1.4rem}
.pill-dot{width:8px;height:8px;border-radius:50%;background:var(--success);box-shadow:0 0 10px var(--success);
  animation:pulseDot 2.2s ease-in-out infinite}
@keyframes pulseDot{
  0%,100%{box-shadow:0 0 0 0 rgba(74,202,142,.55),0 0 10px var(--success)}
  55%{box-shadow:0 0 0 6px rgba(74,202,142,0),0 0 10px var(--success)}
}
.hero h1{font-size:clamp(2.3rem,5.4vw,3.7rem);font-weight:700;letter-spacing:-.5px}
.lead{color:var(--muted);font-size:1.14rem;max-width:60ch;margin:1.25rem auto 1.9rem}
.hero-cta{display:flex;align-items:center;justify-content:center;gap:.9rem;flex-wrap:wrap}
.cta-sub{color:var(--muted);font-size:.9rem;margin:1.1rem 0 0;display:inline-flex;gap:.55rem;align-items:center;flex-wrap:wrap;justify-content:center}
.cta-meta{color:var(--accent-hi);font-weight:600}
.cta-sub .dot{opacity:.45}

/* ---------- device frame (a real screenshot of the app) ---------- */
.hero-shot{position:relative;max-width:1010px;margin:3.4rem auto 0;padding:0 .25rem}
.hero-shot .orb-halo.hero-glow{top:-9%;left:50%;width:min(780px,92%);height:540px;opacity:.5;
  transform:translateX(-50%);animation-name:breathe-hero}
@keyframes breathe-hero{0%,100%{opacity:.4;transform:translateX(-50%) scale(1)}50%{opacity:.62;transform:translateX(-50%) scale(1.05)}}
.device{position:relative;z-index:1;margin:0;border-radius:14px;overflow:hidden;background:var(--nav);
  border:1px solid var(--border-hi);animation:floaty 7s ease-in-out infinite;
  box-shadow:var(--lit),0 44px 100px -34px rgba(0,0,0,.9),0 12px 30px -18px rgba(28,92,200,.5);
  transition:box-shadow .35s ease}
.device:hover{box-shadow:var(--lit),0 54px 120px -34px rgba(0,0,0,.95),0 18px 46px -18px rgba(74,156,255,.7)}
.device img{display:block;width:100%;height:auto}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
/* faint glass sheen along the very top of the frame */
.device::after{content:"";position:absolute;inset:0;pointer-events:none;border-radius:14px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.09),inset 0 0 0 1px rgba(92,112,182,.12)}

/* ---------- sections ---------- */
.section{max-width:1120px;margin:0 auto;padding:4.5rem 1.25rem}
.section.alt{max-width:none;background:linear-gradient(180deg,rgba(20,24,50,.5),rgba(13,16,34,0));
  border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section.alt > *{max-width:1120px;margin-left:auto;margin-right:auto}
.section-head{text-align:center;max-width:640px;margin:0 auto 2.6rem}
.section-head h2{font-size:clamp(1.7rem,3.5vw,2.4rem);font-weight:700}
.section-head p{color:var(--muted);margin:.7rem 0 0}

/* ---------- feature grid ---------- */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1.1rem}
.feature{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:1.5rem 1.35rem;
  box-shadow:var(--lit);transition:transform .22s cubic-bezier(.2,.7,.2,1), border-color .22s ease, box-shadow .22s ease}
.feature:hover{transform:translateY(-5px);border-color:var(--border-hi);
  box-shadow:var(--lit),var(--float),0 0 0 1px rgba(74,156,255,.28),0 16px 40px -20px rgba(74,156,255,.55)}
.ficon{width:48px;height:48px;display:grid;place-items:center;border-radius:12px;margin-bottom:1rem;
  background:linear-gradient(160deg,rgba(74,156,255,.22),rgba(132,118,255,.12));
  border:1px solid var(--border-hi);box-shadow:inset 0 1px 0 rgba(255,255,255,.12),0 6px 18px -8px rgba(74,156,255,.55);
  transition:transform .3s cubic-bezier(.2,.7,.2,1), box-shadow .3s ease, background .3s ease}
.feature:hover .ficon{transform:translateY(-2px) rotate(-5deg);
  background:linear-gradient(160deg,rgba(74,156,255,.34),rgba(132,118,255,.2));
  box-shadow:inset 0 1px 0 rgba(255,255,255,.18),0 10px 26px -8px rgba(74,156,255,.8)}
.ficon svg{width:24px;height:24px;fill:none;stroke:var(--accent-hi);stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;
  transition:stroke .3s ease}
.feature:hover .ficon svg{stroke:#fff}
.feature h3{font-size:1.12rem;margin-bottom:.45rem}
.feature p{color:var(--muted);font-size:.94rem;margin:0}
.feature strong{color:var(--text);font-weight:600}

/* ---------- showcase (real screenshots) ---------- */
.showcase{display:flex;flex-direction:column;gap:5.5rem}
/* small-caps section label, matching the app's in-page headers */
.kicker{display:inline-block;font-family:var(--font-semi);font-weight:700;font-size:.72rem;letter-spacing:.15em;
  text-transform:uppercase;color:var(--accent-hi);padding:.32em .75em;border-radius:6px;margin-bottom:.9rem;
  background:rgba(74,156,255,.1);border:1px solid var(--border-hi)}

/* the reusable framed screenshot */
.shot-frame{position:relative;margin:0;border-radius:12px;overflow:hidden;background:var(--nav);
  border:1px solid var(--border-hi);box-shadow:var(--lit),var(--float);
  transition:transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s ease, border-color .35s ease}
.shot-frame:hover{transform:translateY(-6px);border-color:#6b7fc0;
  box-shadow:var(--lit),0 40px 80px -30px rgba(0,0,0,.9),0 14px 40px -18px rgba(74,156,255,.5)}
.shot-frame img{display:block;width:100%;height:auto}
.shot-frame::after{content:"";position:absolute;inset:0;pointer-events:none;border-radius:12px;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.08)}

/* hero screen of the showcase — the full dashboard, centred */
.feature-shot{text-align:center;position:relative}
.feature-shot h3{font-size:clamp(1.6rem,3vw,2.1rem);margin-bottom:.6rem}
.feature-shot > p{color:var(--muted);max-width:56ch;margin:0 auto}
.feature-media{position:relative;max-width:660px;margin:2rem auto 0}
.feature-media .orb-halo.hero-glow{top:4%;height:60%;width:min(560px,88%);opacity:.4}
.ticks{list-style:none;padding:0;margin:1.6rem auto 0;display:flex;gap:1.6rem;justify-content:center;flex-wrap:wrap}
.ticks li{display:flex;align-items:center;gap:.55rem;color:var(--text);font-size:.95rem;font-weight:500}
.ticks li svg{width:18px;height:18px;flex:none;fill:none;stroke:var(--success);stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}

/* alternating image / copy rows */
.show-row{display:grid;grid-template-columns:1.08fr .92fr;gap:2.8rem;align-items:center}
.show-row.reverse .show-media{order:2}
.show-copy h3{font-size:clamp(1.4rem,2.6vw,1.85rem);margin-bottom:.7rem}
.show-copy > p{color:var(--muted);margin:0 0 1.1rem}
.show-copy .ticks{justify-content:flex-start;margin-top:0}
.show-copy .ticks{flex-direction:column;gap:.65rem;align-items:flex-start}

/* ---------- download ---------- */
.download-card{position:relative;max-width:640px;margin:0 auto;text-align:center;overflow:hidden;
  background:var(--card);border:1px solid var(--border-hi);border-radius:22px;padding:3rem 2rem 2.6rem;box-shadow:var(--lit),var(--float)}
.download-card > *:not(.orb-halo){position:relative;z-index:1}
.download-card .orb-lg{margin-bottom:1rem}
.download-card h2{font-size:2rem}
.dl-sub{color:var(--muted);margin:.5rem 0 1.6rem}
.dl-meta{display:flex;align-items:center;justify-content:center;gap:.6rem;color:var(--muted);font-size:.9rem;margin-top:1rem;flex-wrap:wrap}
.dl-meta .dot{opacity:.5}
.dl-note{color:var(--muted);font-size:.85rem;margin:1.4rem auto 0;max-width:46ch}
.how-updates{margin-top:1.8rem;padding-top:1.5rem;border-top:1px solid var(--border);text-align:left}
.how-updates h4{font-size:1rem;margin-bottom:.4rem}
.how-updates p{color:var(--muted);font-size:.9rem;margin:0}

/* ---------- changelog ---------- */
.changelog{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:1rem}
.cl-item{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:1.2rem 1.4rem;box-shadow:var(--lit);
  transition:border-color .22s ease, box-shadow .22s ease, transform .22s ease;animation:fadeUp .5s ease both}
.cl-item:hover{transform:translateY(-3px);border-color:var(--border-hi);box-shadow:var(--lit),var(--float)}
.cl-top{display:flex;align-items:baseline;gap:.8rem;flex-wrap:wrap;margin-bottom:.5rem}
.cl-tag{font-family:var(--font-semi);font-weight:700;color:var(--accent-hi);font-size:1.1rem}
.cl-date{color:var(--muted);font-size:.85rem}
.cl-body{color:var(--muted);font-size:.94rem;white-space:pre-wrap;margin:0}
.cl-empty{text-align:center;color:var(--muted);padding:2rem}
.cl-empty a{color:var(--accent-hi);text-decoration:underline}

/* ---------- faq ---------- */
.faq{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:.7rem}
.faq details{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:0 1.3rem;overflow:hidden;
  box-shadow:var(--lit);transition:border-color .25s ease, box-shadow .25s ease, background .25s ease}
.faq details:hover{border-color:var(--border-hi)}
.faq details[open]{border-color:var(--border-hi);box-shadow:var(--lit),0 12px 30px -18px rgba(0,0,0,.7)}
.faq summary{cursor:pointer;list-style:none;padding:1.1rem 0;font-family:var(--font-semi);font-weight:600;
  display:flex;justify-content:space-between;align-items:center;gap:1rem;transition:color .2s ease}
.faq summary:hover{color:var(--accent-hi)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--accent);font-size:1.35rem;line-height:1;flex:none;
  transition:transform .28s cubic-bezier(.2,.7,.2,1),color .2s ease}
.faq summary:hover::after{color:var(--accent-hi)}
.faq details[open] summary::after{transform:rotate(135deg)}
.faq details p{color:var(--muted);margin:0 0 1.1rem}
.faq details[open] p{animation:fadeUp .32s ease both}

/* ---------- footer ---------- */
.footer{border-top:1px solid var(--border);margin-top:2rem;background:rgba(11,13,28,.55)}
.footer-inner{max-width:1120px;margin:0 auto;padding:2.5rem 1.25rem;text-align:center}
.foot-brand{display:inline-flex;align-items:center;gap:.55rem;margin-bottom:.7rem}
.foot-note{color:var(--muted);font-size:.9rem;margin:.2rem 0}
.foot-copy{color:var(--muted);opacity:.7;font-size:.85rem;margin:.4rem 0 0}

/* ---------- motion: shared keyframes + scroll reveal ---------- */
@keyframes fadeUp{from{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:none}}

/* Elements start hidden only when JS is present (so no-JS keeps everything visible),
   then slide/fade in when they scroll into view. Staggered children get a delay. */
.js .reveal{opacity:0;transform:translateY(22px);
  transition:opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1);transition-delay:var(--rd,0ms)}
.js .reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:920px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .showcase{gap:3.6rem}
  .show-row{grid-template-columns:1fr;gap:1.6rem}
  .show-row.reverse .show-media{order:0}
}
@media (max-width:640px){
  .nav-links{display:none}
  .grid{grid-template-columns:1fr}
  .lead{max-width:none}
  .hero{padding-top:3rem}
  .hero-shot{margin-top:2.4rem}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto;animation:none!important;transition:none!important}
  .js .reveal{opacity:1!important;transform:none!important}
  .btn::before{display:none}
}