/* Always-visible icon rail; labels never consume space over the performance. */
.stage .stage-meta,.stage .immersive-format,.stage #piano3dKeyTravelControl,.hub-retired{display:none!important}
.stage .piano-hub[hidden]{display:none!important}
.stage .piano-hub,.stage.is-walking .piano-hub{
 display:block!important;position:absolute;left:16px;top:50%;right:auto;bottom:auto!important;
 transform:translateY(-50%);width:48px;height:auto!important;max-width:none;max-height:none;
 margin:0;padding:0;border:0;background:none;box-shadow:none;overflow:visible!important;z-index:24;
}
.piano-hub .piano-hub-panel{display:flex;flex-direction:column;gap:7px;position:relative;padding:0;background:none;overflow:visible}
.piano-hub summary,.chord-disclosure>summary{list-style:none;cursor:pointer;user-select:none}
.piano-hub summary::-webkit-details-marker,.chord-disclosure>summary::-webkit-details-marker{display:none}
.stage.is-3d .piano-hub .piano-hub-panel>button,.piano-hub .piano-hub-panel>details>summary,.chord-disclosure>summary{
 display:flex;align-items:center;justify-content:center;box-sizing:border-box;width:48px;height:48px;min-height:48px;
 padding:0;margin:0;border:1px solid color-mix(in srgb,var(--phsp-panel) 70%,transparent);border-radius:16px;
 background:color-mix(in srgb,var(--phsp-panel) 94%,transparent);color:var(--phsp-accent);
 box-shadow:0 4px 18px color-mix(in srgb,var(--phsp-shadow) 12%,transparent);backdrop-filter:blur(16px);
 cursor:pointer;touch-action:manipulation;
}
.piano-hub svg{width:23px;height:23px;flex:none}
.stage.is-3d .piano-hub .piano-hub-panel>button[aria-pressed="true"],.piano-hub details[open]>summary{background:var(--phsp-accent);color:var(--phsp-ink)}
.piano-hub [data-rail-tip]:hover,.chord-disclosure>summary:hover{filter:brightness(.94)}
.piano-hub .piano-hub-panel>details{position:relative;padding:0;margin:0;border:0;background:none}
.stage.is-3d .piano-hub .stage-settings-panel,.piano-hub .hub-detail-panel{
 position:absolute;left:60px;top:0;right:auto;bottom:auto;transform:none;box-sizing:border-box;
 width:210px;min-width:0;max-width:calc(100vw - 90px);margin:0;padding:14px;display:flex;flex-direction:column;gap:10px;
 border:1px solid var(--phsp-line);border-radius:18px;background:var(--phsp-panel);color:var(--phsp-text-primary);
 box-shadow:0 10px 30px color-mix(in srgb,var(--phsp-shadow) 18%,transparent);
}
.piano-hub details:not([open])>.stage-settings-panel,.piano-hub details:not([open])>.hub-detail-panel{display:none}
.piano-hub .environment-picker{display:flex;flex-direction:column;align-items:stretch;gap:6px;min-width:0!important;width:100%;white-space:normal}
.piano-hub select{width:100%;max-width:100%;padding:10px 5px;border:1px solid var(--phsp-line);border-radius:8px;background:var(--phsp-panel);color:var(--phsp-text-primary)}
.hub-zoom-buttons{display:flex;gap:8px}.hub-zoom-buttons>button{flex:1}
.piano-hub .hub-detail-panel button,.piano-views-dialog button{min-height:44px;padding:10px;border:1px solid var(--phsp-line);border-radius:12px;background:var(--phsp-panel);color:var(--phsp-text-primary);cursor:pointer}
.piano-rail-tooltip{position:absolute;z-index:40;max-width:220px;pointer-events:none;padding:9px 13px;border-radius:10px;background:var(--phsp-panel);color:var(--phsp-text-primary);box-shadow:0 5px 20px color-mix(in srgb,var(--phsp-shadow) 20%,transparent);font:500 12px/1.4 system-ui,sans-serif}
.piano-rail-tooltip[hidden]{display:none}
.piano-views-dialog{box-sizing:border-box;width:min(430px,calc(100vw - 32px));max-height:calc(100dvh - 32px);padding:24px;border:1px solid var(--phsp-line);border-radius:24px;background:var(--phsp-panel);color:var(--phsp-text-primary);box-shadow:0 20px 80px color-mix(in srgb,var(--phsp-shadow) 33%,transparent)}
.piano-views-dialog::backdrop{background:color-mix(in srgb,var(--phsp-shadow) 50%,transparent);backdrop-filter:blur(4px)}
.piano-views-dialog header{display:flex;justify-content:space-between;align-items:center;gap:16px}
.piano-views-dialog small{font-size:10px;letter-spacing:.15em;color:var(--phsp-accent)}
.piano-views-dialog h2{font-size:23px;margin:5px 0}
.piano-views-dialog p{font-size:13px;color:var(--phsp-text-muted);margin:12px 0 20px}
.piano-views-dialog [data-views-close]{width:44px;font-size:24px}
.piano-views-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.piano-views-grid .hub-zoom-buttons{grid-column:1/-1;margin-top:8px;padding-top:16px;border-top:1px solid var(--phsp-line)}
.piano-views-dialog button[aria-pressed="true"]{background:var(--phsp-accent);color:var(--phsp-ink)}
.piano-views-dialog :focus-visible{outline:3px solid var(--phsp-focus-ring);outline-offset:3px}
@media(max-height:620px){
 .stage .piano-hub,.stage.is-walking .piano-hub{width:100px;top:calc(50% + 12px)}
 .piano-hub .piano-hub-panel{display:grid;grid-template-columns:44px 44px;gap:6px}
 .stage.is-3d .piano-hub .piano-hub-panel>button,.piano-hub .piano-hub-panel>details>summary{width:44px;height:44px;min-height:44px;border-radius:14px}
 .stage.is-3d .piano-hub .stage-settings-panel,.piano-hub .hub-detail-panel{left:104px}
 .stage .walk-stick-move{left:128px}
 .stage .fly-height{left:140px}
}
@media(max-height:620px) and (min-width:651px){
 .player-card .stage.is-3d .visual-mode-toolbar{left:50%!important;right:auto!important;transform:translateX(-50%);width:max-content;max-width:calc(100% - 230px)}
}
.stage .chord-disclosure{position:absolute;left:16px;top:16px;z-index:25;color:var(--phsp-text-primary)}
.stage .chord-disclosure .live-chord{
  position:absolute;left:60px;top:0;right:auto;bottom:auto;width:218px;max-width:calc(100vw - 106px);
  transform:none;margin:0;box-sizing:border-box;border-radius:20px;box-shadow:0 12px 40px color-mix(in srgb, var(--phsp-shadow) 16%, transparent);
}
.stage .chord-disclosure:not([open])>.live-chord{display:none!important}
.stage .chord-disclosure[open]>summary{background:var(--phsp-accent);color:var(--phsp-ink)}
.stage .walk-guide{gap:6px;padding:0;background:none;border:0;box-shadow:none}
.stage .walk-guide [data-walk-help]{display:block;padding:10px 15px;background:color-mix(in srgb, var(--phsp-panel) 93%, transparent);border-radius:20px;box-shadow:0 4px 20px color-mix(in srgb, var(--phsp-shadow) 13%, transparent)}
.stage .walk-guide [data-walk-help][hidden]{display:none!important}
.stage .walk-guide [data-walk-exit]{font-size:11px;border-radius:20px;background:color-mix(in srgb, var(--phsp-panel) 90%, transparent);padding:8px 14px}
.stage .fly-height{position:absolute;bottom:195px;left:34px;display:flex;gap:8px;pointer-events:auto}
.stage .fly-height button{width:42px;height:42px;border-radius:50%;font-size:23px;background:var(--phsp-panel);color:var(--phsp-accent);border:1px solid color-mix(in srgb, var(--phsp-panel) 65%, transparent);backdrop-filter:blur(12px)}
.piano-hub :focus-visible,.chord-disclosure :focus-visible{outline:3px solid var(--phsp-focus-ring);outline-offset:3px}
@media(max-width:650px){
 .stage .piano-hub,.stage .chord-disclosure{left:10px}
 .stage .chord-disclosure{top:65px}

 .stage .chord-disclosure .live-chord{left:54px;width:204px}

 .stage .fly-height{bottom:199px;left:21px}
 .stage .walk-guide{max-width:calc(100% - 24px);bottom:8px}
 .stage .walk-guide [data-walk-help]{font-size:11px;padding:8px}
}
@media(prefers-reduced-motion:no-preference){
 .piano-hub .piano-hub-panel,.chord-disclosure .live-chord{animation:hub-reveal .18s ease-out}
 @keyframes hub-reveal{from{opacity:0}to{opacity:1}}
}