:root{
  --bg:#0b1020;
  --panel:rgba(0,0,0,.45);
  --text:#e8ecff;
  --muted:#aab3d6;
  --btn:#1b2a55;
  --btnHover:#22346a;
  --radius:16px;
}

*{box-sizing:border-box}
html,body{height:100%}

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial;
  background: radial-gradient(1200px 600px at 50% 0%, #182a6a, var(--bg));
  color:var(--text);
}

.app{
  height:100%;
  display:flex;
  flex-direction:column;
}

.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:12px 14px;
  background:rgba(0,0,0,.35);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}

.brand{font-weight:900; letter-spacing:.2px}
.status{font-size:12px; color:var(--muted)}

.stage{
  position:relative;
  flex:1;
  overflow:hidden;
  background:#000;
}

/* Webcam background */
#video{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  transform: scaleX(-1); /* mirror default (controlled by JS too) */
}

/* These canvases stack above video */
#mask, #three, #composite{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
}

/* Mask is just a working buffer; keep it invisible */
#mask{ opacity:0; pointer-events:none; }

/* Three can be hidden behind composite; composite is final view */
#three{ pointer-events:none; }
#composite{ pointer-events:none; }

/* Controls */
.hud{
  position:absolute;
  bottom:16px;
  left:50%;
  transform:translateX(-50%);
  width:min(760px, calc(100% - 24px));
  background:var(--panel);
  border-radius:var(--radius);
  padding:12px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.08);
  box-shadow: 0 12px 40px rgba(0,0,0,.35);
  display:flex;
  flex-direction:column;
  gap:10px;
}

.row{
  display:flex;
  gap:10px;
  align-items:center;
  justify-content:center;
  flex-wrap:wrap;
}

.btn{
  border:0;
  border-radius:12px;
  padding:10px 14px;
  color:var(--text);
  background:var(--btn);
  font-weight:800;
  cursor:pointer;
  outline:none;
  user-select:none;
}

.btn:hover{ background:var(--btnHover); }
.btn:active{ transform: translateY(1px); }

.field{
  display:flex;
  align-items:center;
  gap:8px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 12px;
  padding: 8px 10px;
}

.label{
  font-size:12px;
  color:var(--muted);
  min-width:62px;
  text-align:right;
}

.value{
  font-variant-numeric: tabular-nums;
  width:50px;
  text-align:left;
  color:var(--text);
  font-size:12px;
}

input[type="range"]{
  width:220px;
  accent-color: #7aa2ff;
}

.hint{
  font-size:12px;
  color:var(--muted);
  text-align:center;
}

.footer{
  padding:10px 14px;
  font-size:12px;
  color:var(--muted);
  background:rgba(0,0,0,.25);
  border-top: 1px solid rgba(255,255,255,.06);
}

/* Make it kiosk-friendly on big touch screens */
@media (min-width: 900px){
  .btn{ padding:12px 18px; font-size:15px; border-radius:14px; }
  input[type="range"]{ width:260px; }
  .label{ min-width:72px; }
}