:root{
  --bg:#0a0a0f; --fg:#f2f4ff; --muted:#9aa0c0; --accent:#3fd0ff; --accent2:#ff4fa3;
  --panel:rgba(16,16,28,.72);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;height:100%;background:var(--bg);color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  overflow:hidden;overscroll-behavior:none}

/* ---------- Landing ---------- */
#landing{position:fixed;inset:0;display:flex;flex-direction:column;align-items:center;
  justify-content:center;text-align:center;padding:24px;
  background:radial-gradient(1200px 600px at 50% -10%,#1a1030 0%,var(--bg) 60%)}
.hero h1{font-size:clamp(42px,12vw,86px);margin:0;font-weight:800;letter-spacing:-.02em}
.hero h1 .glow{background:linear-gradient(90deg,var(--accent),var(--accent2),var(--accent));
  background-size:220% auto;-webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 0 18px rgba(63,208,255,.45));animation:shimmerText 4.5s linear infinite}
@keyframes shimmerText{to{background-position:220% center}}
.steps{list-style:none;display:flex;gap:10px 16px;justify-content:center;flex-wrap:wrap;
  margin:26px auto 0;padding:0;max-width:360px}
.steps li{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted)}
.steps li span{display:grid;place-items:center;width:22px;height:22px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#04121a;font-weight:800;font-size:12px}
@media(prefers-reduced-motion:reduce){.hero h1 .glow{animation:none}}
.tag{color:var(--muted);font-size:clamp(15px,4.5vw,20px);margin:14px 0 14px}
#heroPreview{width:190px;height:135px;display:block;margin:2px auto 22px}
.tag em{color:var(--fg);font-style:normal;font-weight:600}
.cta{font-size:19px;font-weight:700;color:#04121a;border:0;border-radius:999px;
  padding:16px 34px;cursor:pointer;
  background:linear-gradient(90deg,var(--accent),#9ae9ff);
  box-shadow:0 8px 40px rgba(63,208,255,.35);transition:transform .12s}
.cta:active{transform:scale(.96)}
.ghost{display:block;margin:14px auto 0;background:none;border:1px solid #2a2a44;
  color:var(--muted);border-radius:999px;padding:11px 22px;font-size:14px;cursor:pointer}
.hint{color:#6b7099;font-size:12.5px;margin-top:26px;max-width:320px}
.brandfoot{position:absolute;bottom:18px;color:#4a4f74;font-size:12px;letter-spacing:.18em;text-transform:uppercase}

/* ---------- Stage ---------- */
#stage{position:fixed;inset:0;background:#000}
#gl{position:absolute;inset:0;width:100%;height:100%;display:block}
#hud{position:absolute;top:0;left:0;right:0;display:flex;justify-content:space-between;
  padding:max(14px,env(safe-area-inset-top)) 16px 0;gap:10px}
.iconbtn{width:46px;height:46px;border-radius:50%;border:0;cursor:pointer;
  background:rgba(0,0,0,.45);color:#fff;font-size:20px;backdrop-filter:blur(8px)}
#snapBtn{margin-left:auto;font-size:26px;color:var(--accent)}
#recBtn{font-size:22px;color:#ff5a7a}
.iconbtn.recording{color:#ff2d2d;animation:recpulse 1s infinite}
@keyframes recpulse{0%,100%{opacity:1}50%{opacity:.35}}
button:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
@media(prefers-reduced-motion:reduce){.iconbtn.recording{animation:none}}
#panel{position:absolute;left:0;right:0;bottom:0;padding:16px 16px max(18px,env(safe-area-inset-bottom));
  background:linear-gradient(180deg,transparent,rgba(6,6,12,.85)30%);
  display:grid;gap:10px;max-height:64vh;overflow-y:auto;overscroll-behavior:contain}
#panel::-webkit-scrollbar{width:8px}
#panel::-webkit-scrollbar-thumb{background:#2a2a44;border-radius:8px}
.livebtn{width:100%;border:0;border-radius:12px;padding:13px;font-size:15px;font-weight:800;cursor:pointer;
  color:#04121a;background:linear-gradient(90deg,var(--accent),var(--accent2));
  box-shadow:0 6px 26px rgba(63,208,255,.35);letter-spacing:.02em}
.livebtn:active{transform:scale(.98)}
.livebtn.on{background:linear-gradient(90deg,#ff4fa3,#ffb13f);animation:livepulse 1.6s infinite}
@keyframes livepulse{0%,100%{box-shadow:0 6px 26px rgba(255,79,163,.4)}50%{box-shadow:0 6px 42px rgba(255,177,63,.7)}}
@media(prefers-reduced-motion:reduce){.livebtn.on{animation:none}}
.row{display:grid;grid-template-columns:84px 1fr;align-items:center;gap:12px;
  background:var(--panel);padding:9px 12px;border-radius:12px;backdrop-filter:blur(10px)}
.row label{font-size:13px;color:var(--muted)}
.row input[type=range]{width:100%;accent-color:var(--accent)}
.row select,.row input[type=color]{width:100%;background:#14142a;color:var(--fg);
  border:1px solid #2a2a44;border-radius:8px;padding:7px;font-size:14px}
.row input[type=color]{height:34px;padding:2px}
.row input[type=checkbox]{width:22px;height:22px;accent-color:var(--accent);justify-self:start}
.presets{display:flex;gap:8px;flex-wrap:wrap}
.looks{display:flex;gap:6px;align-items:center}
.looks select{flex:1;min-width:0}
.minibtn{background:#14142a;color:var(--fg);border:1px solid #2a2a44;border-radius:8px;
  padding:7px 9px;font-size:13px;cursor:pointer;white-space:nowrap}
.minibtn:active{transform:scale(.95)}
.minibtn.on{background:linear-gradient(135deg,var(--accent),#9ae9ff);color:#04121a;border-color:transparent}
.brushrow{display:flex;gap:6px;align-items:center;min-width:0}
.brushrow input[type=range]{flex:1;min-width:0}
#spotCount{color:var(--muted);font-size:13px;align-self:center;min-width:14px;text-align:center}
.swatch{width:30px;height:30px;border-radius:8px;border:1px solid #2a2a44;cursor:pointer;padding:0}
.swatch:active{transform:scale(.92)}
#status{position:absolute;top:64px;left:0;right:0;text-align:center;color:var(--accent);
  font-size:13px;pointer-events:none;text-shadow:0 1px 6px #000}
#fps{position:absolute;top:64px;right:10px;font:600 12px ui-monospace,monospace;color:#9affc0;
  background:rgba(0,0,0,.45);padding:3px 8px;border-radius:7px;pointer-events:none;z-index:5}
#tip{position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);max-width:300px;z-index:5;
  background:var(--panel);backdrop-filter:blur(12px);border:1px solid #2a2a44;border-radius:16px;
  padding:18px 18px 16px;text-align:center;box-shadow:0 10px 40px rgba(0,0,0,.5)}
#tip p{margin:0 0 12px;font-size:14.5px;line-height:1.45;color:var(--fg)}
#tip b{color:var(--accent)}
#tip button{background:linear-gradient(90deg,var(--accent),#9ae9ff);color:#04121a;border:0;
  border-radius:999px;padding:9px 24px;font-weight:700;font-size:14px;cursor:pointer}
@media(min-width:760px){#panel{max-width:380px;left:16px;right:auto;top:auto;bottom:16px;border-radius:18px;
  padding:16px;max-height:calc(100vh - 32px);
  background:rgba(10,10,18,0.74);backdrop-filter:blur(16px);border:1px solid #1e1e34;
  box-shadow:0 12px 50px rgba(0,0,0,.5)}}