:root {
  --ink: #16181d;
  --muted: #5c6370;
  --line: #d8dbe2;
  --panel: #ffffff;
  --ground: #f4f5f8;
  --accent: #3e76b8;
  --accent-dark: #1c4e8c;
  --warm: #a83800;
}

* { box-sizing: border-box; }

/* The app fills the window: header, then a row of tree and detail, with the
   waveform docked along the bottom of the detail pane. Only the middle scrolls. */
html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  font: 14px/1.5 "Segoe UI", system-ui, -apple-system, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--ground);
}
body { display: flex; flex-direction: column; }

header {
  flex: none;
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 10px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

h1 { font-size: 16px; margin: 0; letter-spacing: -0.01em; }
h2 { font-size: 15px; margin: 0 0 10px; }
h3 { font-size: 13px; margin: 22px 0 8px; text-transform: uppercase;
     letter-spacing: 0.06em; color: var(--muted); }

.tools { display: flex; align-items: center; gap: 10px; flex: 1; min-width: 0; }

button, .button {
  font: inherit;
  padding: 4px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fbfbfc;
  color: var(--ink);
  cursor: pointer;
}
button:hover:not(:disabled), .button:hover { background: #eef1f6; border-color: #b9c0cc; }
button:disabled { opacity: 0.45; cursor: default; }
/* .button is shared with <label>; an <a> also needs the underline taken off.
   margin-left:auto parks the source link at the far right of the tools row. */
a.button { text-decoration: none; }
#getSource { margin-left: auto; white-space: nowrap; }

#status { color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

main { display: flex; flex: 1; min-height: 0; align-items: stretch; }

nav {
  width: 250px;
  flex: none;
  overflow: auto;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 8px 0;
}

nav .empty { color: var(--muted); padding: 8px 14px; }

nav .disk { padding: 5px 12px; font-weight: 600; cursor: pointer; }
nav .disk.dirty { color: var(--warm); }
nav .group { padding: 3px 12px 3px 24px; color: var(--muted); font-size: 13px; }
nav .item {
  padding: 3px 12px 3px 36px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
nav .item:hover, nav .disk:hover { background: #eef1f6; }
nav .item.sel { background: var(--accent); color: #fff; }
nav .item.away { color: var(--warm); }

#detail { flex: 1; min-width: 0; min-height: 0; display: flex; flex-direction: column; }
#scroll { flex: 1; min-height: 0; overflow: auto; padding: 10px 20px 28px; }
/* the keyboard is the first thing in the pane, and a margin on top of the pane padding
   pushed it a long way down a short screen */
#kgWrap > canvas:first-child,
#kgWrap > .keyrow:first-child { margin-top: 0; }

/* docked, so the waveform is always to hand while the rest scrolls */
#waveWrap {
  flex: none;
  border-top: 1px solid var(--line);
  background: var(--panel);
  padding: 4px 20px 10px;
}
#waveWrap h3 { margin: 6px 0 6px; }
#intro { max-width: 560px; color: var(--muted); }
#intro h2 { color: var(--ink); }
code { font-family: Consolas, "Cascadia Mono", monospace; font-size: 13px; }

table { border-collapse: collapse; width: 100%; font-size: 13px; }
#fields { max-width: 620px; }
#fields td { padding: 2px 10px 2px 0; vertical-align: top; }
#fields td:first-child { color: var(--muted); width: 190px; }

.scroller { overflow-x: auto; border: 1px solid var(--line); background: var(--panel); }
.scroller th, .scroller td { padding: 4px 9px; border-bottom: 1px solid #eceef2; white-space: nowrap; }
.scroller th { text-align: left; background: #f0f2f5; font-weight: 600; position: sticky; top: 0; }
.scroller tr { cursor: pointer; }
.scroller tr.sel td { background: #e4edf9; }
.scroller tr:hover td { background: #f2f6fb; }
.scroller tr.sel:hover td { background: #dbe8f8; }

/* The display size is fixed here, not in the canvas attributes: the script sets
   the backing store from the device pixel ratio, and reading that back as the
   layout size would compound it on every resize. */
canvas { display: block; width: 100%; background: var(--panel); border: 1px solid var(--line); }
/* The keyboard and its velocity strip in one row, the same shape as the waveform and
   its transport below. The canvas takes whatever is left. */
.keyrow { display: flex; align-items: stretch; gap: 10px; margin-bottom: 10px; }
.keyrow canvas { flex: 1; min-width: 0; margin-bottom: 0; }

.velstrip { flex: none; width: 26px; display: flex; flex-direction: column;
            align-items: center; gap: 3px; }

/* vertical-lr with rtl is what puts the maximum at the TOP, the way a fader reads;
   slider-vertical is the older spelling, left in for anything that still wants it. */
.velstrip input[type="range"] {
  writing-mode: vertical-lr;
  direction: rtl;
  -webkit-appearance: slider-vertical;
  appearance: slider-vertical;
  width: 20px; flex: 1; margin: 0; padding: 0; cursor: pointer;
}
.velstrip span { font-size: 10px; color: var(--muted); line-height: 1; }

#piano { height: 96px; margin-bottom: 10px; }
#wave { height: 150px; }

/* Waveform and transport side by side, the canvas taking whatever is left. */
.waverow { display: flex; align-items: stretch; gap: 14px; }
.waverow canvas { flex: 1; min-width: 0; }
.playbar { flex: none; width: 150px; display: flex; flex-direction: column;
           align-items: stretch; gap: 6px; font-size: 13px; }
.playbar label { color: var(--muted); display: flex; align-items: flex-start; gap: 6px;
                 line-height: 1.25; }
.playbar label input { flex: none; margin: 1px 0 0; }
.muted { color: var(--muted); font-weight: 400; text-transform: none; letter-spacing: 0; }

/* --- tree: native disclosure, so nodes toggle without any script */
nav details { }
nav summary { cursor: pointer; list-style: none; padding: 4px 12px; }
nav summary::-webkit-details-marker { display: none; }
nav summary::before { content: "\25B8"; display: inline-block; width: 12px; color: var(--muted); }
nav details[open] > summary::before { content: "\25BE"; }
nav summary.disk { font-weight: 600; }
nav summary.disk.dirty { color: var(--warm); }
nav summary.group { padding-left: 24px; color: var(--muted); font-size: 13px; }

/* --- keygroup editor */
.rowbuttons { float: right; font-weight: 400; text-transform: none; letter-spacing: 0; }
.rowbuttons button { font-size: 12px; padding: 2px 9px; }

/* Keyboard full width, then a row: the number list on the left, the editor filling
   what is left. The list is narrow enough that the envelopes and the property grid
   still sit side by side on a laptop. */
#kgLayout { display: flex; gap: 18px; align-items: flex-start; }

/* wide enough for its own heading: the list names the column it is in, level with the
   editor's heading beside it */
#kgList { flex: none; width: 112px; align-self: flex-start;
          position: sticky; top: 0; display: flex; flex-direction: column; gap: 6px; }
#kgList h3 { margin: 0; white-space: nowrap; }
#kgList .scroller { overflow-x: hidden; overflow-y: auto; max-height: 58vh; }
#keygroups td { padding: 3px 12px; text-align: right; border-left: 3px solid transparent; }
/* The number is the whole row, so the selection has to carry on its own - and with
   several selected the lead, the one the editor shows, has to stand out among them.
   A tint you have to look for is a selection you cannot trust, so the selected rows are
   plainly filled and the lead is filled harder still. */
#keygroups tr.sel td { background: #cfe1f7; color: var(--accent-dark); }
#keygroups tr.sel:hover td { background: #c3d9f3; }
#keygroups tr.lead td { background: #a9cdf1; border-left-color: var(--accent); font-weight: 600; }
#keygroups tr.lead:hover td { background: #9cc4ee; }
/* shift-clicking a list should extend it, not sweep up the numbers as text */
#kgList { user-select: none; -webkit-user-select: none; }
/* a zone naming a sample that is not on this disk - the only thing the wide table
   said that the editor beside it does not */
.scroller tr.away td { color: var(--warm); }
.kgbtns { display: flex; gap: 6px; }
.kgbtns button { flex: 1; font-size: 12px; padding: 2px 0; }

#kgEdit { flex: 1 1 auto; min-width: 0; }
#kgEdit h3 { margin-top: 0; }

.editor { display: flex; gap: 18px; align-items: flex-start; flex-wrap: wrap; }
.envs { flex: 1 1 420px; min-width: 320px; }
#vca, #vcf { height: 120px; }
#vca { margin-bottom: 8px; }
.vcfrow { display: flex; gap: 8px; align-items: stretch; }
.vcfrow canvas { flex: 1; min-width: 0; }
.amt { display: flex; flex-direction: column; align-items: center; width: 54px; flex: none; }
.amt input[type=range] {
  writing-mode: vertical-lr;
  direction: rtl;
  width: 24px;
  height: 96px;
  margin: 0;
}
.amt span { font-size: 11px; color: var(--muted); text-align: center; line-height: 1.3; margin-top: 4px; }

/* --- the info strip: one line under the toolbar */
#infoBar {
  flex: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 7px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
  overflow-x: auto;
  font-size: 13px;
}
#infoBar #fileName { font-weight: 600; font-size: 14px; }
#infoBar .rowbuttons { float: none; }
/* the facts give way first: they truncate rather than push the strip onto two lines */
#infoBar #fileFacts { margin-left: auto; padding-left: 14px;
                      min-width: 0; overflow: hidden; text-overflow: ellipsis; }
#infoBar > * { flex: none; }
#infoBar #fileFacts { flex: 0 1 auto; }

#smpParams, #progParams { display: inline-flex; align-items: center; gap: 14px; }
#smpParams label, #progParams label { color: var(--muted); display: inline-flex; align-items: center; gap: 5px; }
#smpParams input[type=number], #progParams input[type=number] { width: 62px; }
#smpParams input, #smpParams select, #progParams input { font: inherit; padding: 2px 5px;
             border: 1px solid var(--line); border-radius: 3px; }

.pgrid { display: grid; grid-template-columns: auto minmax(124px, 200px); gap: 3px 10px;
         align-items: center; font-size: 13px; }
.pgrid label { color: var(--muted); }
.pgrid select { font: inherit; padding: 2px 5px; border: 1px solid var(--line);
                border-radius: 3px; width: 100%; }

/* A parameter is something you sweep, so it is a slider with its figure beside it -
   wide enough to aim with, and the number still exact for reading back. */
.pgrid .slider { display: flex; align-items: center; gap: 7px; }
.pgrid .slider input[type=range] { flex: 1; min-width: 0; width: auto; margin: 0;
                                   height: 15px; accent-color: var(--accent); }
.pgrid .slider .val { flex: none; width: 27px; text-align: right; font-size: 12px;
                      font-variant-numeric: tabular-nums; }
.pgrid .head { grid-column: 1 / -1; margin-top: 10px; font-weight: 600; color: var(--ink);
               border-bottom: 1px solid var(--line); padding-bottom: 2px; }
/* the 'From keyboard' button rides in the Key range heading, and turns warm while it
   is armed - the same colour the keyboard marks the keys it is about to take */
.pgrid .head button { float: right; font-size: 11px; padding: 0 8px; margin-top: -1px;
                      font-weight: 400; }
.pgrid .head button.armed { background: var(--warm); border-color: var(--warm); color: #fff; }
.pgrid .head button.armed:hover { background: #8d2f00; border-color: #8d2f00; }

/* Under the envelopes, two grids side by side: the keys and the velocity, then the LFO.
   They wrap rather than squeeze when the pane is narrow. */
#paramsUnder { display: flex; gap: 20px; align-items: flex-start; margin-top: 10px;
               flex-wrap: wrap; }
#paramsTop, #paramsLfo { flex: 1 1 210px; min-width: 200px; }
/* and the third column takes the rest of the row */
#params { flex: 1 1 260px; min-width: 240px; }

/* --- add-sample dialog */
dialog {
  border: 1px solid #b9c0cc;
  border-radius: 6px;
  padding: 0;
  width: 520px;
  max-width: 94vw;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.22);
  color: var(--ink);
}
dialog::backdrop { background: rgba(20, 24, 32, 0.35); }
dialog form { padding: 16px 18px 14px; }
dialog h2 { font-size: 15px; margin: 0 0 6px; }
dialog p { margin: 0 0 12px; }

dialog .grid { display: grid; grid-template-columns: 120px 1fr; gap: 8px 12px; align-items: center; }
dialog .grid > label { color: var(--muted); font-size: 13px; }
dialog .pair { display: flex; align-items: center; gap: 8px; }
dialog .pair input[type=number] { width: 88px; }
dialog .pair input[type=text] { width: 140px; text-transform: uppercase; }
dialog select { min-width: 150px; }
dialog input, dialog select {
  font: inherit; padding: 3px 6px; border: 1px solid var(--line); border-radius: 3px;
}
dialog .unit { color: var(--muted); font-size: 12px; }
dialog label.inline { font-size: 13px; display: flex; align-items: center; gap: 6px; }

dialog .summary {
  margin: 14px 0 0;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fafbfc;
  font-size: 13px;
  white-space: pre-line;
  min-height: 42px;
}
dialog .summary.bad { color: #a8203a; border-color: #e4b6bf; background: #fdf6f7; }

dialog menu { display: flex; gap: 8px; align-items: center; margin: 14px 0 0; padding: 0; }
dialog menu .spacer { flex: 1; }

#drop {
  position: fixed;
  inset: 0;
  display: none;
  place-items: center;
  background: rgba(62, 118, 184, 0.12);
  border: 3px dashed var(--accent);
  font-size: 20px;
  color: var(--accent-dark);
  z-index: 10;
}
#drop.on { display: grid; }






/* The running code's build, in the header. Quiet until you look for it. */
#buildStamp {
  font-size: 11px;
  font-weight: normal;
  opacity: 0.55;
  letter-spacing: 0.02em;
  margin-left: 6px;
  vertical-align: 2px;
}

/* Slice dialog: the waveform with its cut markers, and a cost line that turns red
   when the plan will not fit. */
#slWave {
  display: block;
  width: 100%;
  height: 120px;
  margin: 10px 0 4px;
  border: 1px solid var(--line, #ccc);
  border-radius: 3px;
}

#slSens { width: 180px; vertical-align: middle; }

/* the loop-end choices are sentences, not words, so the control has to fit them */
#lpEnd { min-width: 215px; }
#lpHint { margin: 0 0 4px; line-height: 1.35; }

/* the loop dialog draws the tail of the sample, so the join can be seen as well as heard */
#lpWave {
  display: block;
  width: 100%;
  height: 120px;
  margin: 10px 0 4px;
  border: 1px solid var(--line, #ccc);
  border-radius: 3px;
}

.summary.bad { color: #b3261e; }

/* The intro is the whole first screen now, so it gets room to breathe and its own
   rhythm - but it still has to scroll on a laptop, hence the max-width rather than
   filling the pane. */
#intro { max-width: 680px; padding-bottom: 32px; }
#intro .lede { font-size: 15px; color: var(--ink); }
#intro h3 {
  margin: 22px 0 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
#intro ul, #intro ol { margin: 6px 0; padding-left: 20px; }
#intro li { margin: 4px 0; }
#intro b { color: var(--ink); font-weight: 600; }
#intro code {
  background: var(--soft, rgba(127, 127, 127, 0.12));
  padding: 1px 4px;
  border-radius: 3px;
}

/* Save dialog: the two container choices stack rather than sitting side by side, so
   the explanation after each one has room. */
.pair.stack { display: flex; flex-direction: column; gap: 4px; align-items: flex-start; }
.pair.stack .inline { white-space: normal; }
#svName { min-width: 220px; }

/* MIDI input: two selects that read as one control in the toolbar. */
.midi { display: inline-flex; gap: 4px; align-items: center; }
.midi select {
  font: inherit;
  padding: 2px 4px;
  max-width: 190px;
}
.midi select:disabled { opacity: 0.5; }