:root{
  --bg:#030b0a;
  --text:#f5f8f7;
  --muted:#8d9794;
  --line:rgba(255,255,255,.105);
  --green:#10f0bd;
  --orange:#ffad14;
  --panel:rgba(5,16,14,.86);
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;min-height:100%;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
body{
  color:var(--text);
  background:
    radial-gradient(circle at 50% 32%,rgba(16,240,189,.145),transparent 21%),
    radial-gradient(circle at 50% 55%,rgba(16,240,189,.095),transparent 26%),
    linear-gradient(180deg,#020706 0%,var(--bg) 100%);
}
body.light{
  --bg:#eef6f3;
  --text:#111715;
  --muted:#606b67;
  --line:rgba(0,0,0,.10);
  --panel:rgba(255,255,255,.88);
  background:
    radial-gradient(circle at 50% 32%,rgba(16,240,189,.12),transparent 21%),
    radial-gradient(circle at 50% 55%,rgba(16,240,189,.08),transparent 26%),
    linear-gradient(180deg,#fbfffd 0%,var(--bg) 100%);
}
.app{width:min(100%,430px);margin:0 auto;min-height:100vh;padding:24px 18px 28px}
.topbar{height:54px;display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.iconButton{width:45px;height:45px;border-radius:15px;border:1px solid var(--line);background:rgba(255,255,255,.022);display:grid;place-items:center;color:var(--text);padding:0}
.menuButton span{width:19px;height:2px;background:currentColor;border-radius:99px;margin:3px 0;display:block}
.gear{width:22px;height:22px}
.brandText{font-size:18px;font-weight:760;letter-spacing:-.035em;white-space:nowrap;text-align:center;line-height:1}
.brandText b{color:var(--green);text-shadow:0 0 10px rgba(16,240,189,.23)}
.hero h1{margin:0;font-size:clamp(38px,10.8vw,54px);line-height:.95;letter-spacing:-.058em;font-weight:820}
.hero p{margin:9px 0 22px;color:var(--muted);font-size:15px;line-height:1.35}
.themeToggle{display:grid;grid-template-columns:1fr 1fr;padding:4px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.025);margin-bottom:16px}
.themeToggle button{border:0;border-radius:999px;background:transparent;color:var(--muted);font-size:16px;font-weight:650;padding:12px}
.themeToggle button.active{color:var(--text);background:linear-gradient(180deg,rgba(16,240,189,.16),rgba(4,35,29,.72));box-shadow:inset 0 0 0 1px rgba(16,240,189,.84),0 0 18px rgba(16,240,189,.2)}
.light .themeToggle button.active{background:linear-gradient(180deg,rgba(16,240,189,.18),rgba(235,255,250,.95))}
.wheelArea{position:relative;margin:0 -4px 16px;padding-top:23px}
.pointer{position:absolute;left:50%;top:0;transform:translateX(-50%);width:0;height:0;border-left:13px solid transparent;border-right:13px solid transparent;border-top:19px solid var(--orange);filter:drop-shadow(0 0 11px rgba(255,173,20,.45));z-index:10}
.wheelBox{position:relative;width:100%;aspect-ratio:1/1}
#wheelBg{position:absolute;inset:0}
#wheelBg svg{display:block;width:100%;height:100%;overflow:visible}
#mutedKeys,#chordCluster{position:absolute;inset:0}
#chordCluster{pointer-events:none}
.keyButton{
  position:absolute;
  transform:translate(-50%,-50%);
  border:0;
  background:transparent;
  color:var(--text);
  opacity:.42;
  font-size:17px;
  font-weight:650;
  padding:8px;
  cursor:pointer;
}
.keyButton.hidden{opacity:0;pointer-events:auto}
.clusterNode{
  position:absolute;
  transform:translate(-50%,-50%);
  text-align:center;
  line-height:1.05;
  white-space:nowrap;
}
.clusterNode .roman{color:var(--orange);font-size:12px;font-weight:760;margin-bottom:4px}
.clusterNode .chord{color:var(--green);font-size:18px;font-weight:680;text-shadow:0 0 10px rgba(16,240,189,.14)}
.clusterNode.major .chord{color:var(--text);font-size:19px;font-weight:680}
.clusterNode.dim .chord{font-size:15px}
.centerNode{
  position:absolute;
  left:50%;top:56%;
  transform:translate(-50%,-50%);
  text-align:center;
  pointer-events:none;
}
.centerNode .key{font-size:34px;font-weight:760;line-height:1;color:var(--text)}
.centerNode .mode{font-size:16px;font-weight:680;color:var(--green);margin-top:2px}
.infoPanel{border:1px solid var(--line);background:var(--panel);border-radius:22px;padding:18px 17px 17px;box-shadow:0 24px 72px rgba(0,0,0,.48);backdrop-filter:blur(16px)}
.infoTop{display:grid;grid-template-columns:1.1fr .72fr 1fr;gap:12px;align-items:center}
.label{color:var(--green);font-size:12px;font-weight:800;letter-spacing:.115em;text-transform:uppercase}
.selectedInfo h2{font-size:31px;line-height:1;margin:8px 0 3px;font-weight:800;letter-spacing:-.045em}
.selectedInfo p{margin:0;color:var(--muted);font-size:14px;line-height:1.2}
.staffBox svg{width:100%;height:auto;color:var(--text);display:block}
.clef{fill:currentColor;font-size:56px;font-family:Georgia,serif}
.staffAcc{fill:currentColor;font-size:23px;font-weight:750}
.keySignature{border-left:1px solid var(--line);padding-left:13px;font-size:18px;line-height:1.22}
.keySignature strong{color:var(--orange);font-size:27px;font-weight:800}
.keySignature small{display:block;margin-top:4px;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.muted{color:var(--muted)}
.divider{height:1px;background:var(--line);margin:17px 0 16px}
.triadTitle{margin-bottom:14px}
.triadGrid{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}
.triadCell{text-align:center;min-width:0}
.triadRoman{color:var(--orange);font-size:14px;font-weight:750;margin-bottom:8px}
.triadChord{color:var(--green);font-size:17px;font-weight:700;line-height:1}
@media(max-width:390px){
  .app{padding-left:15px;padding-right:15px}
  .hero h1{font-size:42px}
  .brandText{font-size:16px}
  .infoTop{grid-template-columns:1fr .52fr 1fr;gap:8px}
  .selectedInfo h2{font-size:27px}
  .keySignature{font-size:15px}
  .keySignature strong{font-size:23px}
  .triadChord{font-size:16px}
  .triadRoman{font-size:13px}
  .clusterNode .chord{font-size:16px}
  .clusterNode.major .chord{font-size:17px}
  .clusterNode.dim .chord{font-size:14px}
}