/* Page reset */
:root{padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}

/* Layout: instrument stage. Fretboard is the hero; one quiet dock below holds transport and editing; rarely used options live in a View menu. */
:root{
  color-scheme:dark;
  --bg:#0f1311;
  --surface:#141916;
  --raise:#1b221e;
  --line:#232b27;
  --line2:#313b36;
  --fg:#e6ebe4;
  --muted:#8d9991;
  --faint:#5a6560;
  --brass:#d8b46a;
  --brass-ink:#1c1609;
  --font-display:"Bricolage Grotesque","Avenir Next",system-ui,sans-serif;
  --font-body:"Figtree",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*{box-sizing:border-box}
html,body{height:100%}
body{background:var(--bg);color:var(--fg);font-family:var(--font-body);font-size:14px;line-height:1.4;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));
  display:flex;flex-direction:column;overflow:hidden}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brass);outline-offset:2px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* header */
.top{display:flex;align-items:center;gap:12px;height:52px;flex:none}
.brand{display:flex;align-items:center;gap:8px;font:700 17px/1 var(--font-display);letter-spacing:-.01em;white-space:nowrap;margin-right:4px}
.top-r{margin-left:auto;display:flex;gap:2px;align-items:center}

/* buttons */
.gbtn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:30px;min-width:30px;padding:0 8px;border:0;border-radius:8px;background:transparent;color:var(--muted);font:500 12.5px var(--font-body);cursor:pointer;white-space:nowrap}
.gbtn:hover{background:var(--raise);color:var(--fg)}
.gbtn[aria-pressed="true"]{color:var(--brass);background:#d8b46a17}
.gbtn:disabled{opacity:.35;cursor:default;background:transparent}
.gbtn svg{flex:none}
.gbtn .lb{display:none}
body.practice .gbtn .lb{display:inline}
.icon-only{padding:0}
.seg{display:inline-flex;background:var(--bg);border-radius:9px;padding:2px;gap:1px;box-shadow:inset 0 0 0 1px var(--line)}
.seg button{border:0;background:transparent;color:var(--muted);height:26px;padding:0 10px;border-radius:7px;font:500 12px var(--font-body);cursor:pointer;white-space:nowrap}
.seg button:hover{color:var(--fg)}
.seg button[aria-pressed="true"]{background:var(--raise);color:var(--fg)}
.seg.mode{border-radius:999px}
.seg.mode button{border-radius:999px;height:28px;padding:0 15px;font-size:12.5px}
.seg.mode button[aria-pressed="true"]{color:var(--brass)}
.seg.mono button{font-family:var(--font-mono);font-size:11.5px;padding:0 8px}
.lbl{font:600 10px var(--font-body);letter-spacing:.12em;text-transform:uppercase;color:var(--faint)}

/* frame */
.app{display:grid;grid-template-columns:220px minmax(0,1fr);gap:20px;flex:1;min-height:0;padding-bottom:12px}
.lib{display:flex;flex-direction:column;min-height:0;overflow:hidden;border-right:1px solid var(--line);padding-right:12px}
.lib-h{padding:6px 0 8px 8px;display:flex;justify-content:space-between;align-items:center}
.lib-list{overflow:auto;display:flex;flex-direction:column;gap:1px;flex:1;scrollbar-width:thin;scrollbar-color:var(--line2) transparent}
.lib-item{display:grid;grid-template-columns:40px minmax(0,1fr);gap:10px;align-items:center;text-align:left;border:0;background:transparent;color:var(--fg);padding:7px 8px;border-radius:9px;cursor:pointer}
.lib-item:hover{background:var(--surface)}
.lib-item[aria-current="true"]{background:var(--raise)}
.lib-item .t{font-weight:500;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lib-item .k{font-size:11px;color:var(--faint);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.lib-item svg{display:block;border-radius:4px;width:40px;height:24px}
.lib-f{padding:8px 8px 2px}
.linkbtn{background:none;border:0;color:var(--faint);cursor:pointer;padding:0;font-size:11.5px}
.linkbtn:hover{color:var(--muted)}

.stage{display:flex;flex-direction:column;min-width:0;min-height:0;gap:10px;overflow:auto;padding-bottom:4px}
.ex-head{display:flex;gap:10px 20px;align-items:flex-end;justify-content:space-between;flex-wrap:wrap}
.ex-id{min-width:0;flex:1 1 300px}
.ex-title{font:700 22px/1.2 var(--font-display);letter-spacing:-.012em;color:var(--fg);background:transparent;border:0;border-radius:6px;padding:1px 4px;margin:0 -4px;width:100%}
.ex-title:hover:not(:read-only){background:var(--surface)}
.meta-line{font:500 11.5px var(--font-mono);color:var(--muted);margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.desc{margin:4px 0 0;color:var(--faint);font-size:12.5px;max-width:80ch;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden;cursor:pointer}
.desc.open{-webkit-line-clamp:unset;color:var(--muted)}

/* practice now */
.now{display:none}
body.practice .now{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.6fr) auto;border-radius:14px;background:var(--surface)}
.now>div{padding:10px 16px;min-width:0}
.now>div+div{border-left:1px solid var(--line)}
.now-main{display:flex;gap:12px;align-items:center}
.now-sw{width:8px;align-self:stretch;border-radius:4px;flex:none;border:2px solid transparent}
.now-big{font:700 32px/1.05 var(--font-display);letter-spacing:-.02em;white-space:nowrap}
.now-sub{color:var(--muted);font-size:12.5px;margin-top:2px}
.now-note{color:var(--fg);font-size:12.5px;margin-top:4px;opacity:.8}
.now-next{display:flex;flex-direction:column;justify-content:center}
.now-next .v{font:600 17px var(--font-display);margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;color:var(--muted)}
.now-next .s{color:var(--faint);font-size:12px}
.now-pos{display:flex;flex-direction:column;justify-content:center;align-items:flex-end;font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.now-pos .b{font-size:18px;font-weight:600}
.now-pos .c{font-size:11px;color:var(--faint)}

/* fretboard */
.board-wrap{position:relative;border-radius:16px;padding:10px 4px 0;display:flex;justify-content:center;flex:none}
#board{width:100%;height:auto;max-height:54vh;display:block;touch-action:manipulation;-webkit-user-select:none;user-select:none;overflow:visible}
body.practice #board{max-height:58vh}
body.editing #board{cursor:crosshair}
.overlay{position:absolute;inset:0;display:grid;place-items:center;pointer-events:none;opacity:0;transition:opacity .15s}
.overlay.show{opacity:1}
#countin{font:700 110px/1 var(--font-display);color:var(--brass);text-shadow:0 4px 40px #000}
#emptyHint .box{background:#0f1311e6;border:1px solid var(--line2);border-radius:12px;padding:12px 16px;font-size:13px;color:var(--fg);text-align:center;max-width:34ch}

/* svg pieces */
.dotb{transform-box:fill-box;transform-origin:center;transition:transform .12s ease}
.dot-t{font:600 10.5px var(--font-mono);text-anchor:middle;dominant-baseline:central;pointer-events:none}
.mg{transition:opacity .25s ease}
body.playing .mg,body.playing .cn{transition:none}
.sring,.nring,.cring{fill:none;opacity:0}
.sring{stroke:#fff;stroke-width:1.5}
.nring{stroke:#fff;stroke-width:1.4;stroke-dasharray:2.5 3.2}
.cring{stroke:#fff;stroke-width:2}
.mg.sel .sring{opacity:.9}
.mg.cur .cring{opacity:1}
.mg.cur .dotb{transform:scale(1.17)}
.mg.next .nring{opacity:.85}
.mg.cur .dotb.hit{animation:hit .24s ease-out}
@keyframes hit{from{transform:scale(1.5)}to{transform:scale(1.17)}}
.pulse{fill:none;stroke-width:2.2;transform-box:fill-box;transform-origin:center;animation:pulse .6s ease-out forwards;pointer-events:none}
@keyframes pulse{from{transform:scale(1);opacity:.95}to{transform:scale(2.4);opacity:0}}
.badge-t{font:600 9.5px var(--font-mono);text-anchor:middle;dominant-baseline:central}
.tech-t{font:600 10px var(--font-mono);text-anchor:middle;dominant-baseline:central}
.ghb{transform-box:fill-box;transform-origin:center}
.ghb.pop{animation:pop .14s ease-out}
@keyframes pop{from{transform:scale(.55)}to{transform:scale(1)}}
.gh-t{font:600 10.5px var(--font-mono);text-anchor:middle;dominant-baseline:central;fill:#fff}
.gh-a{font:600 9.5px var(--font-body);text-anchor:middle;dominant-baseline:central;fill:#fff;letter-spacing:.04em}
.fretnum{font:500 9.5px var(--font-mono);text-anchor:middle;fill:var(--faint);opacity:.7}
.fretnum.m{fill:var(--muted);opacity:1}
.tune{font:600 10.5px var(--font-mono);text-anchor:middle;dominant-baseline:central;fill:var(--faint)}

/* time strip + info line */
.stripbox{display:flex;flex-direction:column;gap:6px}
.strip{overflow-x:auto;overflow-y:hidden;border-radius:10px;background:var(--surface);scrollbar-width:thin;scrollbar-color:var(--line2) transparent}
#strip{display:block;cursor:pointer}
.strip-t{font:500 9.5px var(--font-mono);fill:var(--faint)}
.infoline{display:flex;flex-wrap:wrap;gap:4px 14px;align-items:center;min-height:26px;font-size:12px;color:var(--muted)}
.hint{display:flex;gap:4px 12px;flex-wrap:wrap;align-items:center;color:var(--faint)}
.hint b{color:var(--muted);font-weight:600}
.insp{display:flex;flex-wrap:wrap;gap:4px 12px;align-items:center}
.insp .mt{color:var(--fg);font-weight:600}
.dchip{display:inline-flex;align-items:center;gap:4px;color:var(--fg)}
.dchip b{font-family:var(--font-mono);font-weight:600}
.dchip .w{color:var(--faint)}
.insp select{background:transparent;color:var(--muted);border:0;border-bottom:1px dotted var(--line2);font:500 11.5px var(--font-body);height:22px;padding:0 2px;cursor:pointer}
.insp select:hover{color:var(--fg)}
.insp select option{background:var(--raise);color:var(--fg)}
.insp input[type=text]{flex:1 1 200px;min-width:0;background:transparent;border:0;border-bottom:1px solid var(--line);color:var(--fg);font:400 12.5px var(--font-body);height:26px;padding:0 2px}
.insp input[type=text]:focus{border-color:var(--brass);outline:none}
.insp input::placeholder{color:var(--faint)}

/* dock */
.dock{display:flex;flex-wrap:wrap;gap:6px 6px;align-items:center;background:var(--surface);border-radius:14px;padding:6px 8px}
.dgroup{display:flex;gap:2px;align-items:center;flex-wrap:wrap}
.play{width:38px;height:38px;border-radius:50%;background:var(--brass);color:var(--brass-ink);border:0;display:grid;place-items:center;cursor:pointer;flex:none}
.play:hover{filter:brightness(1.08)}
.play:disabled{opacity:.4}
.tempo{display:inline-flex;align-items:center;height:30px;margin:0 4px}
.tempo button{width:26px;height:28px;border:0;background:transparent;color:var(--muted);cursor:pointer;font-size:15px;border-radius:7px}
.tempo button:hover{background:var(--raise);color:var(--fg)}
.tempo .v{font:600 12px var(--font-mono);font-variant-numeric:tabular-nums;min-width:72px;text-align:center}
.tempo .v small{color:var(--faint);font-weight:500}
.pos{font:500 11.5px var(--font-mono);color:var(--faint);font-variant-numeric:tabular-nums;margin-left:auto;padding-right:6px;white-space:nowrap}
.sep{width:1px;height:20px;background:var(--line);margin:0 6px}
.colorbtn{width:30px;height:30px;border:0;border-radius:8px;background:transparent;display:grid;place-items:center;cursor:pointer}
.colorbtn:hover{background:var(--raise)}
.colorbtn i{width:16px;height:16px;border-radius:50%;display:block;box-shadow:0 0 0 2px var(--bg),0 0 0 3px var(--line2)}
.sw{width:24px;height:24px;border-radius:50%;border:2px solid transparent;cursor:pointer;padding:0}
.sw[aria-pressed="true"]{border-color:#fff}

body.practice .edit-only{display:none !important}
body:not(.practice) .practice-only{display:none !important}

/* popovers */
.pop{position:fixed;z-index:40;background:var(--raise);border:1px solid var(--line2);border-radius:14px;padding:14px 16px;box-shadow:0 20px 60px #000a;width:min(340px,calc(100vw - 32px))}
.pop.anchor-top{right:max(16px,env(safe-area-inset-right,0px));top:56px}
.pop h3{margin:0 0 10px;font:700 15px var(--font-display)}
.pop dl{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;margin:0;font-size:12.5px}
.pop dt{font-family:var(--font-mono);color:var(--brass);white-space:nowrap}
.pop dd{margin:0;color:var(--muted)}
.pop p{font-size:12px;color:var(--faint);margin:12px 0 0}
.vrow{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:7px 0}
.vrow+.vrow{border-top:1px solid var(--line)}
.vrow span{font-size:12.5px;color:var(--muted)}
.switch{width:34px;height:20px;border-radius:999px;border:0;background:var(--line2);position:relative;cursor:pointer;flex:none}
.switch::after{content:"";position:absolute;top:3px;left:3px;width:14px;height:14px;border-radius:50%;background:var(--fg);transition:transform .15s}
.switch[aria-pressed="true"]{background:var(--brass)}
.switch[aria-pressed="true"]::after{transform:translateX(14px);background:var(--brass-ink)}
#palette{width:auto;padding:10px;display:flex;gap:6px}
.scrim{display:none}

@media (max-width:900px){
  .app{grid-template-columns:minmax(0,1fr)}
  .lib{position:fixed;left:0;top:0;bottom:0;width:min(290px,86vw);z-index:30;background:var(--surface);border:0;border-radius:0 16px 16px 0;padding:calc(10px + env(safe-area-inset-top,0px)) 10px 10px calc(10px + env(safe-area-inset-left,0px));transform:translateX(-105%);transition:transform .2s ease}
  body.lib-open .lib{transform:none}
  body.lib-open .scrim{display:block;position:fixed;inset:0;background:#0008;z-index:25}
}
@media (min-width:901px){#libBtn{display:none}}
@media (max-width:640px){
  body{overflow:auto;display:block}
  .app{display:block}
  .stage{overflow:visible}
  .brand span{display:none}
  .ex-title{font-size:19px}
  body.practice .now{grid-template-columns:minmax(0,1fr) auto}
  body.practice .now-main{grid-column:1/-1;border-bottom:1px solid var(--line)}
  body.practice .now-next{border-left:0 !important}
  .now-big{font-size:28px}
  .pos{margin-left:0;width:100%;padding:2px 6px 0}
  .sep{display:none}
  #board,body.practice #board{max-height:none}
  .board-wrap{padding:6px 0 0}
}
@media (prefers-reduced-motion:reduce){
  .pulse{animation-duration:.01s}
  .mg.cur .dotb.hit,.ghb.pop{animation:none}
  .dotb,.mg,.switch::after{transition:none}
}