:root {
  color-scheme:dark;
  --cyan:#62ffe2;
  --gold:#f6df8a;
  --muted:#83969d;
  --line:#ffffff1c;
  font-family:Inter,"Noto Sans SC","Microsoft YaHei",system-ui,sans-serif
}
* {
  box-sizing:border-box
}
body {
  margin:0;
  background:#060d15;
  color:#effbf9;
  overflow:hidden
}
button,a {
  -webkit-tap-highlight-color:transparent
}
button {
  font:inherit;
  cursor:pointer;
  border:0
}
button:disabled {
  opacity:.4;
  cursor:wait
}
a {
  color:inherit;
  text-decoration:none
}
#stage,.vignette {
  position:fixed;
  inset:0
}
#stage canvas {
  display:block;
  width:100%;
  height:100%
}
.vignette {
  pointer-events:none;
  background:linear-gradient(90deg,#050d17b8,transparent 75%),linear-gradient(0deg,#060d15a0,transparent 40%)
}
header {
  height:96px;
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 5%;
  border-bottom:1px solid var(--line);
  z-index:2
}
.brand {
  font-size:25px;
  font-weight:850;
  letter-spacing:4px
}
.brand span {
  font-size:12px;
  letter-spacing:2px;
  font-weight:400;
  color:#adbfca
}
.top-right {
  font:10px monospace;
  letter-spacing:2px;
  color:var(--muted);
  display:flex;
  gap:12px;
  align-items:center
}
.top-right #mode {
  border:1px solid var(--line);
  padding:8px
}
.live-dot {
  width:6px;
  height:6px;
  background:var(--cyan);
  border-radius:50%;
  box-shadow:0 0 12px var(--cyan)
}
main {
  position:relative;
  z-index:1
}
.panel {
  position:absolute
}
.title-panel {
  left:8%;
  top:10vh;
  width:620px
}
.eyebrow {
  font-size:10px;
  font-weight:700;
  letter-spacing:3px;
  color:var(--cyan);
  margin:0 0 20px
}
h1 {
  font-size:clamp(42px,5.3vw,76px);
  letter-spacing:-3px;
  line-height:1.2;
  margin:0 0 25px;
  font-weight:850
}
h1 span {
  color:var(--cyan)
}
.intro {
  color:#a4b7c4;
  line-height:1.9;
  font-size:15px
}
.tags {
  display:flex;
  gap:9px;
  margin:25px 0
}
.tags span {
  font-size:10px;
  letter-spacing:1px;
  padding:7px 12px;
  border:1px solid #ffffff25;
  border-radius:3px
}
.actions {
  display:flex;
  gap:12px;
  flex-wrap:wrap
}
.primary,.secondary {
  padding:16px 24px;
  border-radius:4px;
  font-size:13px;
  letter-spacing:1px
}
.primary {
  background:var(--cyan);
  color:#082023;
  font-weight:800;
  box-shadow:0 0 30px #62ffe212;
  min-width:160px
}
.primary b {
  padding-left:45px
}
.primary:hover {
  background:#acffeb
}
.secondary {
  background:#0a1b26c9;
  color:#c5dcdf;
  border:1px solid #51747d70
}
.small {
  font-size:10px;
  color:var(--muted);
  margin-top:18px
}
.title-footer {
  display:flex;
  gap:32px;
  border-top:1px solid var(--line);
  padding-top:22px;
  margin-top:38px;
  font-size:10px;
  letter-spacing:1px;
  color:var(--muted);
  width:490px
}
.compact {
  top:7vh;
  left:50%;
  transform:translateX(-50%);
  width:min(520px,90vw);
  padding:38px;
  background:#081720ed;
  border:1px solid #36616c6e;
  border-radius:12px;
  text-align:center;
  box-shadow:0 30px 100px #0007
}
.compact h2 {
  font-size:29px;
  margin:10px 0 20px
}
.compact p {
  font-size:13px;
  line-height:1.9;
  color:#a4b7c4
}
.compact .eyebrow {
  color:var(--cyan);
  font-size:10px
}
.compact .actions {
  justify-content:center
}
.compact button {
  margin-top:12px
}
.status {
  color:var(--gold)!important
}
.loader {
  width:40px;
  height:40px;
  border:2px solid #21403c;
  border-top-color:var(--cyan);
  border-radius:50%;
  margin:30px auto;
  animation:spin 1s linear infinite
}
@keyframes spin {
  to {
    transform:rotate(360deg)
  }
}
.hidden {
  display:none!important
}
#playing {
  height:calc(100dvh - 96px);
  padding:28px 5%
}
.session-head {
  display:flex;
  justify-content:space-between
}
.session-head h2 {
  font-size:19px;
  font-weight:450;
  margin:0
}
.session-head .eyebrow {
  margin-bottom:12px
}
.score-block {
  text-align:right
}
.score-block span {
  display:block;
  color:var(--muted);
  font-size:10px;
  letter-spacing:3px
}
.score-block strong {
  font-size:38px;
  font-variant-numeric:tabular-nums;
  font-weight:500
}
.combo {
  position:absolute;
  left:6%;
  top:28vh;
  display:flex;
  flex-direction:column;
  text-align:center
}
.combo strong {
  font-size:70px;
  font-weight:250;
  line-height:1
}
.combo span {
  font-size:10px;
  color:var(--cyan);
  letter-spacing:4px;
  margin-top:12px
}
#feedback {
  position:absolute;
  left:50%;
  top:30vh;
  transform:translateX(-50%);
  font-size:42px;
  font-weight:850;
  letter-spacing:5px;
  text-shadow:0 0 25px currentColor;
  pointer-events:none;
  transition:opacity .15s
}
.target-labels {
  position:absolute;
  left:32%;
  right:32%;
  top:66vh;
  display:flex;
  justify-content:space-between;
  color:#b2d7d9;
  font-size:11px;
  letter-spacing:3px
}
#next-note {
  position:absolute;
  left:50%;
  top:14vh;
  transform:translateX(-50%);
  font-size:16px;
  color:var(--gold);
  background:#0b2029ba;
  border:1px solid #59767250;
  border-radius:30px;
  padding:12px 24px;
  white-space:nowrap
}
.progress {
  position:absolute;
  bottom:65px;
  left:5%;
  right:5%;
  height:2px;
  background:#ffffff20
}
#progress-fill {
  height:100%;
  background:var(--cyan);
  width:0
}
.session-bottom {
  position:absolute;
  bottom:25px;
  left:5%;
  right:5%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  font-size:10px;
  letter-spacing:1px;
  color:var(--muted)
}
#pause {
  color:var(--cyan);
  background:none
}
.result-score {
  font-size:60px;
  line-height:1.2;
  margin:24px 0 6px;
  color:var(--cyan);
  font-weight:300
}
.result-grid {
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px 10px;
  margin:30px 0;
  padding:23px 0;
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line)
}
.result-grid strong {
  display:block;
  font-size:22px;
  font-weight:500
}
.result-grid span {
  display:block;
  font-size:10px;
  color:var(--muted);
  margin-top:6px
}
#preview {
  position:fixed;
  right:25px;
  bottom:103px;
  width:224px;
  height:196px;
  border:1px solid #3b616980;
  background:#07131bcb;
  border-radius:8px;
  overflow:hidden;
  z-index:3
}
#preview video,#preview canvas {
  position:absolute;
  top:25px;
  width:224px;
  height:168px;
  object-fit:contain;
  transform:scaleX(-1)
}
#preview video {
  opacity:.5
}
.preview-label {
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:25px;
  padding:7px 9px;
  background:#0d232c;
  display:flex;
  justify-content:space-between;
  font-size:8px;
  letter-spacing:1px;
  color:#b2cccc;
  z-index:2
}
#tracking {
  position:absolute;
  bottom:0;
  left:0;
  right:0;
  background:#08131ccf;
  padding:6px 2px;
  margin:0;
  text-align:center;
  font-size:9px;
  color:var(--gold)
}
#debug {
  position:fixed;
  left:22px;
  bottom:110px;
  z-index:4;
  padding:12px;
  background:#000b;
  color:var(--cyan);
  font-size:10px;
  pointer-events:none
}
#privacy {
  position:fixed;
  bottom:20px;
  width:100%;
  text-align:center;
  font-size:9px;
  letter-spacing:2px;
  color:#627c89
}
#privacy span {
  margin:0 12px
}
body.active #privacy {
  display:none
}
@media(max-width:800px) {
  header {
    height:72px
  }
  .top-right {
    display:none
  }
  .title-panel {
    top:9vh;
    left:7%;
    width:86%
  }
  .title-footer {
    width:100%;
    gap:15px
  }
  h1 {
    font-size:50px
  }
  .compact {
    top:5vh;
    padding:24px
  }
  #preview {
    width:144px;
    height:140px;
    right:12px;
    bottom:98px
  }
  #preview video,#preview canvas {
    width:144px;
    height:108px
  }
  .preview-label {
    font-size:7px
  }
  .preview-label span:last-child {
    display:none
  }
  #tracking {
    font-size:8px
  }
  #playing {
    height:calc(100dvh - 72px)
  }
  .combo {
    top:30vh
  }
  .combo strong {
    font-size:48px
  }
  .session-bottom>span:nth-child(2) {
    display:none
  }
  .target-labels {
    left:24%;
    right:24%
  }
  .score-block strong {
    font-size:29px
  }
  #next-note {
    top:19vh
  }
  .result-grid {
    margin:16px 0;
    gap:14px
  }
  .result-score {
    font-size:45px
  }
  .small {
    line-height:1.8
  }
}
/* Four independent layers share the same mirrored cover transform. */
body > #camera {position:fixed;inset:0;width:100%;height:100%;object-fit:cover;transform:scaleX(-1);opacity:.18;filter:grayscale(.8) blur(2px);pointer-events:none;z-index:0}
#camera-shade {position:fixed;inset:0;background:linear-gradient(#060d1555,#060d1590);pointer-events:none;z-index:0}
#motion-layer {position:fixed;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
#stage {z-index:1;pointer-events:none}
header,main {z-index:3}
.vignette {z-index:2}
#preview {display:none!important}
#coach-speech {position:fixed;z-index:4;top:26%;left:50%;transform:translateX(-50%);border:1px solid #70aeac66;border-radius:18px;background:#102632dd;color:#e0fff9;padding:10px 20px;font-size:15px;pointer-events:none}
#coach-speech:empty {display:none}
#feedback {left:73%;top:35vh;font-size:32px}
#coach-speech {top:17%}
#next-note {left:25%;top:16vh}

body > #tracking {position:fixed;left:auto;right:4%;bottom:80px;width:250px;border-radius:8px;z-index:4;padding:8px;font-size:11px}

#motion-layer.sim-preview {inset:auto 18px 18px auto;width:280px;height:210px;border:1px solid #81b6c433;border-radius:12px;background:#0a1520;z-index:3;opacity:1}

/* Camera interactions remain reachable at standing distance. */
body.handsfree .panel.compact{width:min(960px,94vw);max-width:94vw}
body.handsfree [data-gesture]{min-width:calc(18vw + 1px);min-height:calc(12vh + 1px);white-space:normal}
body.handsfree .actions{gap:3vw;flex-wrap:wrap}
body.handsfree.paused #pause{position:fixed;left:40vw;top:42vh;z-index:40;background:#16463f;font-size:30px}
#calibrate{background:linear-gradient(90deg,#248b78 var(--hold,0%),#174a45 var(--hold,0%));color:white}
.gesture-pointer{position:fixed;z-index:100;pointer-events:none;width:46px;height:46px;transform:translate(-50%,-50%);border-radius:50%;background:conic-gradient(var(--hand) var(--progress,0deg),#ffffff30 0);border:2px solid var(--hand);box-shadow:0 0 18px var(--hand)}
.gesture-pointer:after{content:'';position:absolute;inset:8px;background:#07151e;border-radius:50%}
.gesture-pointer[hidden]{display:none}
#asset-progress{position:fixed;bottom:32px;left:4vw;right:4vw;font-size:12px;color:#b1cfc9;z-index:15;pointer-events:none}
#asset-progress progress{width:100%;height:4px;display:block;accent-color:#62ffe2}
#countdown-text{font-size:100px}

.gesture-help{display:none}body.handsfree .gesture-help{display:block;color:#a2c5bf;font-size:14px}