/* =========================================================================
   NEONBOOM — application shell
   Layout: topbar / stage(pads | arrange | inspector) / drawer / mobile tabbar
   ========================================================================= */
*,*::before,*::after{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0; background:var(--bg-0); color:var(--ink-0);
  font-family:var(--sans); font-size:13px; line-height:1.35;
  overflow:hidden; -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
  overscroll-behavior:none;
}
button{font:inherit; color:inherit; cursor:pointer; -webkit-tap-highlight-color:transparent;}
input,select{font:inherit; color:inherit;}
::selection{background:var(--amber); color:#140d00;}
:focus-visible{outline:2px solid var(--focus); outline-offset:2px;}
::-webkit-scrollbar{width:11px;height:11px;}
::-webkit-scrollbar-track{background:var(--bg-0);}
::-webkit-scrollbar-thumb{background:var(--line-2); border-radius:6px; border:2px solid var(--bg-0);}
::-webkit-scrollbar-thumb:hover{background:var(--line-3);}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);}

/* ---------------------------------------------------------------- buttons */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:7px;
  min-height:34px; padding:0 12px; border-radius:var(--r-sm);
  background:linear-gradient(180deg,var(--bg-3),var(--bg-2));
  border:1px solid var(--line-2); color:var(--ink-0);
  font-size:12px; font-weight:600; letter-spacing:.01em;
  box-shadow:var(--shadow-1); transition:border-color .12s, background .12s, transform .06s, color .12s;
  touch-action:manipulation; white-space:nowrap;
}
.btn:hover{border-color:var(--line-3); background:linear-gradient(180deg,var(--bg-4),var(--bg-3));}
.btn:active{transform:translateY(1px);}
.btn[disabled]{opacity:.45; pointer-events:none;}
.btn.primary{background:linear-gradient(180deg,#ffc247,var(--amber)); border-color:#c98a10; color:#1a1200; font-weight:800;}
.btn.primary:hover{background:linear-gradient(180deg,#ffd06a,#ffb020);}
.btn.ghost{background:transparent; box-shadow:none;}
.btn.ghost:hover{background:var(--bg-3);}
.btn.danger{color:var(--danger); border-color:#4a2b2b;}
.btn.danger:hover{background:#2a1a1a; border-color:var(--danger);}
.btn.on{background:linear-gradient(180deg,#3a2d10,#2a2008); border-color:var(--amber); color:var(--amber); box-shadow:var(--glow-amber);}
.btn.wide{width:100%;}
.btn.icon{padding:0; width:34px; min-width:34px;}
.btn svg{width:15px;height:15px;display:block;}

/* square transport keys — the tactile part */
.key{
  display:inline-flex; align-items:center; justify-content:center;
  width:40px; height:40px; padding:0; border-radius:9px;
  background:linear-gradient(180deg,#2b3441,#1a212a);
  border:1px solid var(--line-2); color:var(--ink-0);
  box-shadow:0 1px 0 rgba(255,255,255,.06) inset, 0 2px 0 rgba(0,0,0,.55);
  transition:transform .05s, border-color .12s, background .12s, box-shadow .12s;
  touch-action:manipulation;
}
.key:hover{border-color:var(--line-3);}
.key:active{transform:translateY(2px); box-shadow:0 1px 0 rgba(0,0,0,.55);}
.key svg{width:17px;height:17px;}
.key.play{width:52px; height:52px; border-radius:50%; background:linear-gradient(180deg,#2f3a48,#1b222b);}
.key.play svg{width:20px;height:20px;}
.key.play.on{background:linear-gradient(180deg,#ffc247,#e59a12); border-color:#c98a10; color:#160f00; box-shadow:0 0 20px rgba(255,176,32,.35);}
.key.rec.on{background:linear-gradient(180deg,#ff7a7a,#e04343); border-color:#b83a3a; color:#fff; box-shadow:0 0 18px rgba(255,93,93,.4);}
.key.on{border-color:var(--amber); color:var(--amber);}

/* ---------------------------------------------------------------- topbar */
#topbar{
  height:var(--topbar-h); flex:0 0 auto; display:flex; align-items:center; gap:12px;
  padding:0 14px; background:linear-gradient(180deg,#181e26,#10151a);
  border-bottom:1px solid var(--line); position:relative; z-index:20;
}
#topbar::after{content:''; position:absolute; left:0; right:0; bottom:-1px; height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,176,32,.35),transparent);}
.brand{display:flex; flex-direction:column; line-height:1; margin-right:4px;}
.brand b{font-size:15px; letter-spacing:.14em; font-weight:900; color:var(--amber);}
.brand b span{color:var(--ink-0);}
.brand em{font-style:normal; font-size:8.5px; letter-spacing:.22em; color:var(--ink-2); margin-top:4px; text-transform:uppercase;}
.transport{display:flex; align-items:center; gap:6px;}
.lcd{
  appearance:none; text-align:center; cursor:pointer;
  background:linear-gradient(180deg,#07090a,#0c1013);
  border:1px solid var(--line-2); border-radius:var(--r-sm);
  padding:5px 12px; min-width:118px; text-align:center; position:relative; overflow:hidden;
  box-shadow:0 1px 0 rgba(255,255,255,.05) inset, 0 0 0 1px rgba(0,0,0,.6);
}
.lcd::after{content:''; position:absolute; inset:0; pointer-events:none;
  background:repeating-linear-gradient(0deg,rgba(0,0,0,.25) 0 1px,transparent 1px 3px); opacity:.5;}
.lcd:hover{border-color:var(--line-3);}
.lcd b{
  display:block; font-family:var(--mono); font-size:16px; font-weight:600; letter-spacing:.06em;
  color:var(--amber); text-shadow:0 0 10px rgba(255,176,32,.45);
}
.lcd span{display:block; font-size:7.5px; letter-spacing:.18em; color:var(--amber-dim); margin-top:1px; white-space:nowrap;}
.tempo{display:flex; align-items:center; gap:2px; background:var(--bg-1); border:1px solid var(--line);
  border-radius:var(--r-sm); padding:2px;}
.tempo input{
  width:52px; height:30px; text-align:center; background:transparent; border:0;
  font-family:var(--mono); font-size:15px; font-weight:600; color:var(--amber);
  -moz-appearance:textfield;
}
.tempo input::-webkit-outer-spin-button,.tempo input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0;}
.tempo .step{width:26px;height:30px;border:0;background:transparent;color:var(--ink-1);border-radius:4px;font-size:15px;line-height:1;}
.tempo .step:hover{background:var(--bg-3); color:var(--amber);}
.tempo .unit{font-size:8px; letter-spacing:.14em; color:var(--ink-3); padding-right:6px;}
.masterVu{display:flex; gap:2px; align-items:flex-end; height:26px; width:56px;
  padding:3px; background:var(--bg-0); border:1px solid var(--line); border-radius:4px;}
.masterVu i{flex:1; height:100%; background:#1d242c; border-radius:1px; transition:background .06s;}
.masterVu i.on{background:var(--ok); box-shadow:0 0 6px rgba(65,209,138,.45);}
.masterVu i.hot{background:var(--danger); box-shadow:0 0 6px rgba(255,93,93,.5);}
.topActions{display:flex; align-items:center; gap:6px; margin-left:auto;}
.pill{font-family:var(--mono); font-size:10px; color:var(--ink-2); border:1px solid var(--line);
  padding:3px 8px; border-radius:20px; white-space:nowrap;}

/* ---------------------------------------------------------------- stage */
#stage{flex:1; display:grid; grid-template-columns:var(--pad) minmax(0,1fr) var(--inspect); min-height:0;}
#app{display:flex; flex-direction:column; height:100dvh; height:100vh;}

/* ---------------------------------------------------------------- pads */
#padPanel{display:flex; flex-direction:column; min-height:0; background:var(--bg-1); border-right:1px solid var(--line);}
.panelHead{
  display:flex; align-items:center; gap:8px; padding:9px 12px; flex:0 0 auto;
  border-bottom:1px solid var(--line); font-size:10px; letter-spacing:.14em;
  text-transform:uppercase; color:var(--ink-1); font-weight:700;
}
.panelHead .count{font-family:var(--mono); letter-spacing:0; color:var(--ink-3); font-weight:400;}
.panelHead .spacer{flex:1;}
.chips{display:flex; gap:5px; padding:8px 10px 4px; flex-wrap:wrap; flex:0 0 auto;}
.chip{
  border:1px solid var(--line-2); background:var(--bg-2); color:var(--ink-1);
  border-radius:20px; padding:4px 10px; font-size:10.5px; font-weight:600; letter-spacing:.03em;
  min-height:28px; touch-action:manipulation;
}
.chip:hover{border-color:var(--line-3); color:var(--ink-0);}
.chip.on{background:var(--amber); border-color:var(--amber); color:#1a1200;}
.padGrid{
  flex:1; min-height:0; overflow-y:auto; display:grid; gap:8px; padding:8px 10px 10px;
  grid-template-columns:repeat(2,minmax(0,1fr)); align-content:start;
}
.pad{
  position:relative; display:flex; flex-direction:column; justify-content:space-between;
  min-height:74px; padding:8px 9px; border-radius:var(--r-md); overflow:hidden;
  background:linear-gradient(165deg,var(--bg-3),var(--bg-2) 70%);
  border:1px solid var(--line-2); text-align:left; touch-action:manipulation;
  transition:transform .07s, border-color .12s, box-shadow .12s;
  box-shadow:0 2px 6px rgba(0,0,0,.35), 0 1px 0 rgba(255,255,255,.04) inset;
}
.pad::before{content:''; position:absolute; inset:0; pointer-events:none;
  background:radial-gradient(120% 90% at 20% 0%,var(--pad-color,rgba(255,176,32,.18)),transparent 60%);
  opacity:.5;}
.pad:hover{border-color:var(--line-3); transform:translateY(-1px);}
.pad:active,.pad.hit{transform:scale(.97); border-color:var(--pad-color,var(--amber)); box-shadow:0 0 0 1px var(--pad-color,var(--amber)), 0 0 22px rgba(255,176,32,.22);}
.pad .pname{position:relative; font-size:11px; font-weight:700; line-height:1.2; z-index:1;
  display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;}
.pad .pwave{position:relative; height:26px; width:100%; z-index:1; opacity:.9;}
.pad .pcat{position:relative; z-index:1; font-size:8px; letter-spacing:.13em; text-transform:uppercase; color:var(--ink-2);
  display:flex; align-items:center; gap:5px;}
.pad .pcat i{width:5px;height:5px;border-radius:50%; background:var(--pad-color,var(--amber)); display:block;}
.pad .pkey{position:absolute; top:6px; right:7px; font-family:var(--mono); font-size:8px; color:var(--ink-3); z-index:1;}
.padBar{display:flex; gap:6px; padding:0 10px 10px; flex:0 0 auto;}

/* ---------------------------------------------------------------- arrange */
#arrange{display:flex; flex-direction:column; min-width:0; min-height:0; background:var(--bg-0); position:relative;}
.arrangeBar{
  display:flex; align-items:center; gap:8px; padding:7px 10px; flex:0 0 auto;
  border-bottom:1px solid var(--line); background:var(--bg-1);
}
.segmented{display:flex; border:1px solid var(--line-2); border-radius:var(--r-sm); overflow:hidden;}
.segmented button{min-height:30px; padding:0 10px; border:0; background:var(--bg-2); color:var(--ink-1);
  font-size:11px; font-weight:700;}
.segmented button+button{border-left:1px solid var(--line-2);}
.segmented button.on{background:var(--bg-4); color:var(--amber);}
.zoomGrp{display:flex; align-items:center; gap:2px; background:var(--bg-2); border:1px solid var(--line-2); border-radius:var(--r-sm);}
.zoomGrp button{min-height:30px; min-width:30px; border:0; background:transparent; color:var(--ink-1); font-size:14px; font-weight:700;}
.zoomGrp button:hover{color:var(--amber);}
.zoomGrp span{font-family:var(--mono); font-size:10px; color:var(--ink-2); min-width:42px; text-align:center;}
.arrangeBar .spacer{flex:1;}
.arrangeBar .hint{font-size:10.5px; color:var(--ink-3); white-space:nowrap; overflow:hidden; text-overflow:ellipsis;}

.arrangeHead{display:flex; flex:0 0 auto; height:30px; background:var(--bg-2); border-bottom:1px solid var(--line);}
.headSpacer{width:var(--heads); flex:0 0 auto; border-right:1px solid var(--line);
  display:flex; align-items:center; padding:0 10px; font-size:8.5px; letter-spacing:.16em; color:var(--ink-3);}
#ruler{display:block; flex:1; height:30px; touch-action:pan-x; cursor:pointer;}
.arrangeBody{flex:1; display:flex; min-height:0; position:relative;}
#trackHeads{
  width:var(--heads); flex:0 0 auto; overflow:hidden; background:var(--bg-1);
  border-right:1px solid var(--line); position:relative;
}
#trackHeadsInner{will-change:transform;}
#tlViewport{
  flex:1; min-width:0; overflow:auto; position:relative; background:var(--bg-0);
  -webkit-overflow-scrolling:touch; overscroll-behavior:contain;
}
#tlSpacer{position:relative;}
#tlCanvas{position:absolute; top:0; left:0; display:block; will-change:transform; touch-action:pan-x pan-y;}
#tlViewport.edit #tlCanvas{touch-action:none; cursor:crosshair;}

/* track header rows */
.trackHead{
  display:flex; flex-direction:column; justify-content:center; gap:2px;
  padding:4px 8px; border-bottom:1px solid var(--line); position:relative;
  background:var(--bg-1); height:var(--track-h); cursor:pointer;
}
.trackHead.sel{background:var(--bg-3);}
.trackHead .thRow{display:flex; align-items:center; gap:6px; min-width:0;}
.trackHead .tag{width:3px; height:22px; border-radius:2px; flex:0 0 auto;}
.trackHead .tname{
  flex:1; min-width:0; background:transparent; border:1px solid transparent; border-radius:3px;
  color:var(--ink-0); font-size:11.5px; font-weight:700; padding:2px 3px;
}
.trackHead .tname:hover{background:var(--bg-2);}
.trackHead .tname:focus{background:var(--bg-2); border-color:var(--line-3); outline:none;}
.trackHead .num{font-family:var(--mono); font-size:8.5px; color:var(--ink-3);}
.trackHead .tgrip{
  background:none; border:0; color:var(--ink-3); font-size:12px; line-height:1;
  padding:0; cursor:grab; touch-action:none; flex:0 0 auto;
  min-width:14px; min-height:14px;
}
.trackHead .tgrip:hover{color:var(--amber);}
.trackHead .tgrip:active{cursor:grabbing;}
/* touch: a 30 px hit box without growing the row (negative margins absorb it) */
@media (max-width:860px){
  .trackHead .tgrip{min-width:30px; min-height:30px; margin:-6px -2px -6px -6px; font-size:15px;}
}
.trackHead .tbtn{
  width:24px; height:22px; border-radius:3px; border:1px solid var(--line-2);
  background:var(--bg-2); color:var(--ink-2); font-size:9px; font-weight:800; padding:0;
  display:flex; align-items:center; justify-content:center; touch-action:manipulation;
}
.trackHead .tbtn.m.on{background:var(--danger); border-color:var(--danger); color:#fff;}
.trackHead .tbtn.s.on{background:var(--amber); border-color:var(--amber); color:#1a1200;}
.trackHead .meter{flex:1; height:4px; border-radius:2px; background:var(--bg-4); overflow:hidden; min-width:20px;}
.trackHead .meter i{display:block; height:100%; width:0%; background:var(--ok); transition:width .07s linear;}
.trackHead .vol{width:100%; height:10px; margin:0;}
.trackHead .vol::-webkit-slider-runnable-track{height:3px;}
.trackHead .vol::-webkit-slider-thumb{width:9px; height:9px; margin-top:-4px;}
.trackHead .vol::-moz-range-thumb{width:9px;height:9px;}

/* ---------------------------------------------------------------- inspector */
#inspector{
  display:flex; flex-direction:column; min-height:0; background:var(--bg-1);
  border-left:1px solid var(--line); overflow-y:auto;
}
.insp-empty{padding:26px 18px; text-align:center; color:var(--ink-2); font-size:12px; line-height:1.6;}
.insp-empty b{display:block; color:var(--ink-1); margin-bottom:6px; font-size:13px;}
.insp-card{padding:12px; border-bottom:1px solid var(--line);}
.insp-card h4{margin:0 0 10px; font-size:9.5px; letter-spacing:.16em; text-transform:uppercase; color:var(--ink-2); font-weight:700;
  display:flex; justify-content:space-between; align-items:center;}
.insp-title{font-size:13px; font-weight:700; margin-bottom:2px; word-break:break-word;}
.insp-sub{font-family:var(--mono); font-size:10px; color:var(--ink-2); margin-bottom:8px;}
.insp-wave{width:100%; height:56px; display:block; background:var(--bg-0); border:1px solid var(--line); border-radius:var(--r-sm); margin-bottom:10px;}
.knobRow{display:flex; align-items:center; gap:8px; margin-bottom:9px;}
.knobRow label{font-size:10.5px; color:var(--ink-1); flex:0 0 54px;}
.knobRow input[type=range]{flex:1; min-width:0;}
.knobRow .val{font-family:var(--mono); font-size:10px; color:var(--ink-0); width:44px; text-align:right;}
.grid2{display:grid; grid-template-columns:1fr 1fr; gap:6px;}
.grid3{display:grid; grid-template-columns:repeat(3,1fr); gap:6px;}
.statRow{display:flex; justify-content:space-between; font-size:10.5px; color:var(--ink-2); padding:3px 0;}
.statRow b{font-family:var(--mono); color:var(--ink-0); font-weight:500;}

/* range inputs */
input[type=range]{
  -webkit-appearance:none; appearance:none; background:transparent; height:20px; width:100%; margin:0;
  touch-action:none;
}
input[type=range]::-webkit-slider-runnable-track{height:4px; border-radius:2px; background:var(--bg-4); border:1px solid var(--line);}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none; width:14px; height:14px; margin-top:-6px; border-radius:50%;
  background:linear-gradient(180deg,#ffd06a,var(--amber)); border:1px solid #a4700f; box-shadow:0 1px 3px rgba(0,0,0,.5);
}
input[type=range]::-moz-range-track{height:4px; border-radius:2px; background:var(--bg-4); border:1px solid var(--line);}
input[type=range]::-moz-range-thumb{width:13px;height:13px;border-radius:50%;background:var(--amber);border:1px solid #a4700f;}
input[type=number],input[type=text],select{
  background:var(--bg-2); border:1px solid var(--line-2); border-radius:var(--r-xs);
  padding:6px 8px; min-height:32px; font-family:var(--mono); font-size:12px;
}
select{cursor:pointer;}

/* ---------------------------------------------------------------- drawer */
#drawer{
  flex:0 0 auto; background:var(--bg-1); border-top:1px solid var(--line);
  display:flex; flex-direction:column; max-height:36vh; min-height:0;
}
#drawer[data-open="false"] .drawerBody{display:none;}
.drawerTabs{display:flex; gap:0; flex:0 0 auto; border-bottom:1px solid var(--line); overflow-x:auto;}
.drawerTabs button{
  border:0; background:transparent; color:var(--ink-2); font-size:11px; font-weight:700;
  letter-spacing:.06em; text-transform:uppercase; padding:9px 14px; border-bottom:2px solid transparent;
  min-height:38px;
}
.drawerTabs button.on{color:var(--amber); border-bottom-color:var(--amber); background:var(--bg-2);}
.drawerBody{overflow-y:auto; padding:12px; min-height:0;}

/* mixer strips */
.mixRow{display:flex; gap:8px; overflow-x:auto; padding-bottom:4px; align-items:flex-start;}
.mstrip{
  width:78px; flex:0 0 auto; background:var(--bg-2); border:1px solid var(--line);
  border-radius:var(--r-md); padding:7px 6px; display:flex; flex-direction:column; gap:5px; align-items:center;
}
.mstrip.sel{border-color:var(--amber);}
.mstrip .mname{font-size:9.5px; font-weight:700; text-align:center; width:100%; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
.mstrip .mtrk{font-family:var(--mono); font-size:8px; color:var(--ink-3);}
.mstrip .mfader{width:22px; height:86px; writing-mode:vertical-lr; direction:rtl; -webkit-appearance:none; appearance:none;}
.mstrip .mfader::-webkit-slider-runnable-track{width:4px; height:100%; background:var(--bg-4); border:1px solid var(--line); border-radius:2px;}
.mstrip .mfader::-webkit-slider-thumb{-webkit-appearance:none; width:20px; height:12px; border-radius:2px;
  background:linear-gradient(180deg,#5b6675,#3a4350); border:1px solid #6b7787; margin-left:-9px;}
.mstrip .mval{font-family:var(--mono); font-size:9px; color:var(--ink-1);}
.mstrip .mpan{width:100%;}
.mstrip .msend{display:flex; align-items:center; gap:3px; width:100%;}
.mstrip .msend b{font-size:8px; color:var(--ink-3); font-weight:700; width:7px; flex:0 0 auto;}
.mstrip .msend input{flex:1; min-width:0; height:14px;}
.mstrip .msend input::-webkit-slider-runnable-track{height:3px;}
.mstrip .msend input::-webkit-slider-thumb{width:8px; height:8px; margin-top:-3px;}
.mstrip .msend input::-moz-range-thumb{width:8px;height:8px;}
.mstrip .mbtns{display:flex; gap:4px; width:100%;}
.mstrip .mbtns .tbtn{flex:1; height:22px; font-size:9px; font-weight:800; border-radius:3px;
  border:1px solid var(--line-2); background:var(--bg-3); color:var(--ink-2);}
.mstrip .mbtns .tbtn.m.on{background:var(--danger); border-color:var(--danger); color:#fff;}
.mstrip .mbtns .tbtn.s.on{background:var(--amber); border-color:var(--amber); color:#1a1200;}
.mstrip .mstripMeter{width:100%; height:4px; background:var(--bg-4); border-radius:2px; overflow:hidden;}
.mstrip .mstripMeter i{display:block; height:100%; width:0%; background:var(--ok);}

/* fx modules */
.fxGrid{display:grid; grid-template-columns:repeat(auto-fit,minmax(230px,1fr)); gap:10px;}
.fxModule{background:var(--bg-2); border:1px solid var(--line); border-radius:var(--r-md); padding:11px 12px;}
.fxModule h5{margin:0 0 10px; font-size:9.5px; letter-spacing:.14em; text-transform:uppercase; color:var(--amber);
  display:flex; justify-content:space-between; align-items:center; font-weight:700;}
.toggleChip{font-size:8.5px; border:1px solid var(--line-2); border-radius:10px; padding:2px 7px; color:var(--ink-2);
  letter-spacing:.08em; cursor:pointer; background:var(--bg-3);}
.toggleChip.on{background:var(--amber); border-color:var(--amber); color:#1a1200;}

.histRow{display:flex; justify-content:space-between; align-items:center; gap:12px; width:100%;
  background:var(--bg-2); border:1px solid var(--line); border-radius:var(--r-sm);
  padding:9px 12px; margin-bottom:5px; color:var(--ink-0); font-size:12px; text-align:left; min-height:38px;}
.histRow:hover{border-color:var(--amber); color:var(--amber);}
.histStep{font-family:var(--mono); font-size:10px; color:var(--ink-3);}

/* export + help panes */
.pane{max-width:640px;}
.pane h3{margin:0 0 6px; font-size:14px;}
.pane p{margin:0 0 12px; color:var(--ink-1); font-size:12px; line-height:1.6;}
.pane .row{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:12px;}
.kbd{display:inline-block; font-family:var(--mono); font-size:10px; background:var(--bg-3);
  border:1px solid var(--line-2); border-bottom-width:2px; border-radius:4px; padding:1px 6px; margin-right:4px;}
.shortcuts{display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:6px 18px;}
.shortcuts div{display:flex; justify-content:space-between; gap:10px; font-size:11.5px; color:var(--ink-1);
  padding:4px 0; border-bottom:1px dashed var(--line);}

/* ---------------------------------------------------------------- tabbar (mobile) */
#tabbar{display:none;}
@media (max-width:900px){
  .masterVu{display:none;}
  #saveState{display:none;}
  .brand em{display:none;}
  .lcd{min-width:104px;}
  #topbar{gap:8px;}
}
@media (max-width:860px){
  #toasts{bottom:calc(70px + env(safe-area-inset-bottom));}
  #tabbar{
    display:grid; grid-template-columns:repeat(5,1fr); flex:0 0 auto;
    background:linear-gradient(180deg,#141a21,#0d1216); border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
    position:relative; z-index:30;
  }
  #tabbar button{
    display:flex; flex-direction:column; align-items:center; justify-content:center; gap:3px;
    min-height:56px; border:0; background:transparent; color:var(--ink-2); font-size:9.5px;
    font-weight:700; letter-spacing:.06em; text-transform:uppercase; padding:6px 2px;
  }
  #tabbar button svg{width:20px;height:20px;}
  #tabbar button.on{color:var(--amber);}
  #tabbar button.on::before{content:''; position:absolute; top:0; width:34px; height:2px; background:var(--amber);}
}

/* ---------------------------------------------------------------- sheet + toast */
#scrim{position:fixed; inset:0; background:rgba(0,0,0,.6); backdrop-filter:blur(2px); z-index:60; display:none;}
#scrim.on{display:block;}
#sheet{
  position:fixed; left:0; right:0; bottom:0; z-index:61; display:none;
  background:var(--bg-1); border-top:1px solid var(--line-2); border-radius:16px 16px 0 0;
  padding:8px 12px calc(14px + env(safe-area-inset-bottom)); box-shadow:0 -14px 40px rgba(0,0,0,.6);
  max-height:78vh; overflow-y:auto;
}
#sheet.on{display:block; animation:sheetIn .18s ease-out;}
@keyframes sheetIn{from{transform:translateY(18px);opacity:.4;}to{transform:none;opacity:1;}}
#sheet .grab{width:38px;height:4px;border-radius:2px;background:var(--line-3);margin:2px auto 10px;}
#sheet h4{margin:0 0 10px; font-size:13px;}
#sheet .sheetRow{display:flex; align-items:center; gap:10px; padding:10px 4px; border-bottom:1px solid var(--line); min-height:46px;}
#sheet .sheetRow label{flex:0 0 84px; font-size:11.5px; color:var(--ink-1);}
#sheet .sheetRow input[type=range]{flex:1;}
#sheet .sheetRow .val{font-family:var(--mono); font-size:10px; width:46px; text-align:right;}
#sheet .sheetBtns{display:grid; grid-template-columns:1fr 1fr; gap:8px; margin-top:10px;}
#toasts{position:fixed; left:50%; transform:translateX(-50%); bottom:22px; z-index:80; display:flex;
  flex-direction:column; gap:8px; align-items:center; pointer-events:none; width:min(92vw,420px);}
.toast{
  background:rgba(22,28,36,.96); border:1px solid var(--line-2); color:var(--ink-0);
  border-radius:var(--r-md); padding:9px 14px; font-size:12px; box-shadow:var(--shadow-2);
  animation:toastIn .16s ease-out; max-width:100%;
}
.toast.ok{border-color:#2e6b4b;} .toast.warn{border-color:#6b5726;} .toast.err{border-color:#6b2e2e;}
@keyframes toastIn{from{transform:translateY(8px);opacity:0;}to{transform:none;opacity:1;}}

/* ---------------------------------------------------------------- boot veil */
#boot{
  position:fixed; inset:0; z-index:100; background:radial-gradient(circle at 50% 40%,#141a21,#06070a 70%);
  display:flex; align-items:center; justify-content:center; flex-direction:column; gap:16px;
  transition:opacity .35s;
}
#boot.done{opacity:0; pointer-events:none;}
#boot .logo{font-family:var(--mono); font-size:26px; letter-spacing:.3em; color:var(--amber);
  text-shadow:0 0 26px rgba(255,176,32,.45);}
#boot .bar{width:min(260px,60vw); height:3px; background:var(--bg-3); border-radius:2px; overflow:hidden;}
#boot .bar i{display:block; height:100%; width:0%; background:linear-gradient(90deg,#8a6420,var(--amber)); transition:width .18s;}
#boot .msg{font-family:var(--mono); font-size:10.5px; color:var(--ink-2); letter-spacing:.06em; min-height:14px;}
#boot .skip{position:absolute; bottom:26px; font-size:10.5px; color:var(--ink-3);}

/* ---------------------------------------------------------------- responsive */
@media (max-width:1280px){
  :root{--pad:232px; --inspect:252px;}
}
@media (max-width:1100px){
  #stage{grid-template-columns:var(--pad) minmax(0,1fr);}
  #inspector{display:none;}
  .arrangeBar .hint{display:none;}
}
@media (max-width:860px){
  :root{--topbar-h:56px;}
  #stage{grid-template-columns:1fr; grid-template-rows:minmax(0,1fr);}
  #app{padding-bottom:0;}
  /* one view at a time */
  #padPanel,#arrange{display:none; min-height:0;}
  body[data-view="pads"] #padPanel{display:flex;}
  body[data-view="arrange"] #arrange{display:flex;}
  #drawer{display:none; position:fixed; left:0; right:0; bottom:56px; top:auto; max-height:64vh;
    border-radius:14px 14px 0 0; box-shadow:0 -10px 30px rgba(0,0,0,.6); z-index:40;}
  #drawer.mobileOpen{display:flex;}
  .padGrid{grid-template-columns:repeat(3,minmax(0,1fr)); gap:10px; padding:10px;}
  .pad{min-height:88px;}
  .brand em{display:none;}
  .masterVu{display:none;}
  .arrangeBar{padding:6px 8px;}
}
@media (max-width:860px){
  /* fingers, not cursors: every hit target grows with the tabbed layout */
  .btn{min-height:40px; padding:0 14px;}
  .key{width:40px; height:40px;}
  .key.play{width:48px; height:48px;}
  .trackHead .tbtn{width:34px; height:34px; font-size:11px;}
  .trackHead .vol{height:26px;}
  .trackHead .vol::-webkit-slider-thumb{width:14px; height:14px; margin-top:-6px;}
  .trackHead .num{display:none;}
  .segmented button{min-height:36px;}
  .zoomGrp button{min-height:36px; min-width:36px;}
  .chip{min-height:32px;}
  .drawerTabs button{min-height:44px;}
  input[type=range]{height:28px;}
  input[type=range]::-webkit-slider-thumb{width:18px;height:18px;margin-top:-8px;}
}
@media (max-width:680px){
  #topbar{gap:6px; padding:0 8px;}
  #btnUndo,#btnRedo,#btnHelp{display:none;}
  .tempo{display:none;}
  .lcd span{font-size:8px;}
  #btnRewind{display:none;}
  .brand b{font-size:12px; letter-spacing:.1em;}
  .transport{gap:4px;}
  .key{width:36px;height:36px;}
  .key.play{width:44px;height:44px;}
  .lcd{min-width:86px; padding:4px 8px;}
  .lcd:hover{border-color:var(--line-3);}
.lcd b{font-size:13px;}
  .lcd span{font-size:6.5px;}
  .tempo input{width:40px; font-size:13px;}
  .tempo .unit{display:none;}
  .topActions .desktopOnly{display:none;}
  .padGrid{grid-template-columns:repeat(3,minmax(0,1fr));}
  .pad{min-height:82px; padding:7px;}
  .pad .pname{font-size:10px;}
  .arrangeBar{gap:6px; flex-wrap:nowrap; overflow-x:auto;}
  .zoomGrp button{min-width:34px;}
  .headSpacer{width:112px;}
  :root{--heads:112px; --track-h:72px;}
  .drawerTabs button{padding:10px 12px;}
  .btn{min-height:40px;}
  .key{min-height:36px;}
}
@media (max-width:430px){
  .brand{display:none;}
  .lcd{min-width:80px;}
  .topActions .pill{display:none;}
  .key{width:38px;height:38px;}
  .key.play{width:46px;height:46px;}
  #btnMetro{display:none;}
}
@media (hover:none){
  .btn{min-height:var(--tap); padding:0 14px;}
  .key{width:44px; height:44px;}
  .key.play{width:54px; height:54px;}
  .chip{min-height:34px;}
  .trackHead .tbtn{width:34px;height:34px;}
  .segmented button{min-height:36px;}
  .zoomGrp button{min-height:36px; min-width:36px;}
  .drawerTabs button{min-height:44px;}
  input[type=range]{height:30px;}
  input[type=range]::-webkit-slider-thumb{width:20px;height:20px;margin-top:-9px;}
}
@media (prefers-reduced-motion:reduce){ *{animation:none!important; transition:none!important;} }


/* ---------------------------------------------------------------- palette
   data-palette="safe" swaps the neon track colours for a colour-blind-safe
   set (Okabe–Ito derived) and calms the accents. Track colours live in JS, so
   the token below is read by util.TRACK_COLORS via CSS custom properties. */
:root[data-palette="safe"]{
  --amber:#e69f00;
  --amber-soft:#f0c46b;
  --ok:#009e73;
  --danger:#d55e00;
  --warn:#f0e442;
}

/* ------------------------------------------------------------- text size */
:root[data-textsize="large"]{ font-size:15px; }
:root[data-textsize="large"] .trackHead .tname{font-size:12.5px;}
:root[data-textsize="large"] .pad .pname{font-size:12px;}
:root[data-textsize="large"] .insp-title{font-size:14px;}
:root[data-textsize="large"] .btn{font-size:13px;}

/* --------------------------------------------------------- template rows */
.tplRow{display:flex; flex-direction:column; gap:3px; width:100%; text-align:left;
  background:var(--bg-2); border:1px solid var(--line); border-radius:var(--r-md);
  padding:12px 14px; margin-bottom:8px; color:var(--ink-0); min-height:60px;}
.tplRow:hover{border-color:var(--amber);}
.tplName{font-size:13px; font-weight:700; display:flex; justify-content:space-between; gap:10px; align-items:baseline;}
.tplName b{font-family:var(--mono); font-size:9.5px; font-weight:400; color:var(--ink-3);}
.tplBlurb{font-size:11.5px; color:var(--ink-2);}


/* ------------------------------------------------------------- scene strip */
#sceneBar{
  display:flex; align-items:center; gap:6px; flex:0 0 auto; overflow-x:auto;
  padding:6px 10px; background:var(--bg-1); border-bottom:1px solid var(--line);
  scrollbar-width:thin;
}
.sceneChip{
  display:flex; align-items:center; gap:6px; flex:0 0 auto;
  background:var(--bg-2); border:1px solid var(--line-2); color:var(--ink-1);
  border-radius:20px; padding:5px 12px; font-size:11.5px; font-weight:600;
  min-height:30px; white-space:nowrap; touch-action:manipulation;
}
.sceneChip:hover{border-color:var(--amber); color:var(--amber);}
.sceneChip.active{background:var(--amber); border-color:var(--amber); color:#1a1200;}
.sceneChip b{font-family:var(--mono); font-size:9px; font-weight:400; opacity:.7;}
.sceneAdd{
  display:flex; align-items:center; gap:5px; flex:0 0 auto; margin-left:auto;
  background:transparent; border:1px dashed var(--line-2); color:var(--ink-2);
  border-radius:20px; padding:5px 12px; font-size:11px; font-weight:700; min-height:30px;
}
.sceneAdd:hover{border-color:var(--amber); color:var(--amber);}
#sceneBar .empty{font-size:11px; color:var(--ink-3); padding-left:2px;}
@media (max-width:860px){ .sceneChip,.sceneAdd{min-height:36px;} }


/* ------------------------------------------------------------ busy overlay */
#busyBox{
  position:fixed; inset:0; display:none; align-items:center; justify-content:center;
  background:rgba(6,8,10,.72); backdrop-filter:blur(2px); z-index:60;
}
#busyBox.on{display:flex;}
.busyInner{
  display:flex; flex-direction:column; align-items:center; gap:10px;
  background:var(--bg-2); border:1px solid var(--line-2); border-radius:var(--r-lg);
  padding:22px 28px; min-width:220px; text-align:center;
}
.busySpin{
  width:26px; height:26px; border-radius:50%;
  border:2px solid var(--line-2); border-top-color:var(--amber);
  animation:busySpin .8s linear infinite;
}
@keyframes busySpin{to{transform:rotate(360deg);}}
.busyLabel{font-size:12.5px; font-weight:600;}
.busyTime{font-family:var(--mono); font-size:11px; color:var(--ink-3);}
@media (prefers-reduced-motion:reduce){ .busySpin{animation:none; border-top-color:var(--amber);} }

/* record button */
#btnRecord.rec{background:var(--danger); border-color:var(--danger); color:#fff;}