/* Stem It! — dark, with a neon color for each track. */
:root {
  color-scheme: dark;
  --bg: #07070d; --card: #10101a; --raised: #171726; --ink: #eef0ff; --muted: #8b8dae; --line: #24243b;
  --accent: #00e5ff; --accent-ink: #04121a;
  --vocals: #ff4fd8; --drums: #3d8bff; --bass: #a66bff; --guitar: #ff9f1c; --piano: #e6ff3a; --other: #2bff9e;
  --glow: 0 0 14px; --well: #05050a; --glow1: #1a0f2e; --glow2: #071d2b; --head: #ffffff;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
input[type=range] { accent-color: var(--accent); }
body { margin: 0; font: 16px/1.5 system-ui, sans-serif; color: var(--ink);
  background: radial-gradient(1200px 600px at 10% -10%, var(--glow1) 0%, transparent 60%),
              radial-gradient(900px 500px at 110% 0%, var(--glow2) 0%, transparent 55%), var(--bg);
  background-attachment: fixed; min-height: 100vh; }
header, main { max-width: 860px; margin: 0 auto; padding: 0 16px; }
header { padding-top: 32px; }
h1 { margin: 0; font-size: 2.2rem; letter-spacing: -0.02em; color: var(--ink);
  text-shadow: 0 0 18px color-mix(in srgb, var(--vocals) 60%, transparent); }
h2 { margin: 0; font-size: 1.3rem; }
.tag { color: var(--muted); margin-top: 4px; }
.card { background: color-mix(in srgb, var(--card) 92%, transparent); border: 1px solid var(--line); border-radius: 16px;
  padding: 20px; margin: 20px 0; box-shadow: 0 10px 40px #0008; }
.drop { display: block; border: 2px dashed var(--line); border-radius: 12px; padding: 40px 16px; text-align: center; cursor: pointer; transition: border-color .2s, box-shadow .2s; }
.drop:hover, .drop.over { border-color: var(--accent); box-shadow: var(--glow) color-mix(in srgb, var(--accent) 35%, transparent); }
.drop input { display: none; }
.maker .motto { font-style: italic; }
.maker .sns { height: 1.75em; width: auto; vertical-align: -.55em; margin-left: .5em; }
@media (max-width: 520px) { .maker .motto { display: block; } .maker .dot { display: none; } }
.beta { margin: 6px 0 0; font-size: .85rem; color: var(--muted); }
.beta .badge { font-size: .7rem; margin-right: 4px; }
.maker { margin: -2px 0 6px; font-size: .85rem; letter-spacing: .04em; color: var(--muted); }
.bestbass { margin-top: 12px; flex-wrap: wrap; }
.firsttime { margin: 12px 0 0; }
.firsttime + .bestbass { margin-top: 6px; }
.bestbass .hint { display: inline; margin: 0; font-size: .8rem; }
.hint { display: block; color: var(--muted); font-size: .9rem; margin-top: 6px; }
.status { color: var(--muted); white-space: pre-line; }
.status.error { color: #ff6b6b; white-space: pre-wrap; }
button, select { white-space: nowrap; font: inherit; padding: 8px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--raised); color: var(--ink); cursor: pointer; transition: box-shadow .15s, border-color .15s; }
button:hover:not(:disabled), select:hover { border-color: color-mix(in srgb, var(--accent) 60%, var(--line)); }
button.primary, button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); border-color: var(--accent);
  box-shadow: var(--glow) color-mix(in srgb, var(--accent) 45%, transparent); font-weight: 600; }
button:disabled { opacity: .45; cursor: default; }
button.small { padding: 4px 10px; font-size: .85rem; }
.spacer { flex: 1; }

/* Title and badges */
.titlerow { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 12px; }
.badges { display: flex; gap: 6px; }
.badge { font-size: .85rem; font-weight: 600; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--raised); font-variant-numeric: tabular-nums; }

/* Waveforms */
canvas.wave { width: 100%; display: block; border-radius: 10px; background: var(--well); cursor: pointer; touch-action: none; }
#wave { height: 80px; }
#seek { width: 100%; margin: 8px 0; }
.transport, .knobs, .metro { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
#time { font-variant-numeric: tabular-nums; color: var(--muted); }

/* Key and tempo */
.knobs { margin: 16px 0; gap: 16px; align-items: flex-end; }
.knob { display: flex; flex-direction: column; gap: 4px; flex: 1; min-width: 220px; }
.knob .label { font-size: .85rem; color: var(--muted); }
.knob output { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.stepper { display: flex; align-items: center; gap: 6px; }
.stepper button { padding: 6px 12px; font-weight: 700; }
.stepper select, .stepper input[type=range] { flex: 1; min-width: 0; }

/* Metronome */
.metro { padding: 12px 0; border-top: 1px solid var(--line); }
.lights { display: inline-flex; gap: 6px; }
.lights i { width: 12px; height: 12px; border-radius: 50%; background: var(--raised); border: 1px solid var(--line); transition: background .05s; }
.lights i.on { background: var(--accent); box-shadow: var(--glow) var(--accent); border-color: var(--accent); }
.lights i.on.one { background: var(--vocals); box-shadow: var(--glow) var(--vocals); border-color: var(--vocals); }
#clickVol { width: 100px; }
.bpm { font-variant-numeric: tabular-nums; font-weight: 600; }
.check { font-size: .9rem; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.pair { display: inline-flex; gap: 4px; }
.pair button, .metro button { padding: 4px 10px; }

/* Chords */
.chords, .lyrics, .tracks { border-top: 1px solid var(--line); padding: 12px 0; }
.chordhead { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px; }
.seg { display: inline-flex; flex-wrap: wrap; gap: 4px; }
.seg button { padding: 4px 10px; font-size: .9rem; }
.nownext { display: flex; align-items: baseline; gap: 16px; margin: 10px 0 6px; }
#chordNow { font-size: 2.4rem; font-weight: 800; letter-spacing: -0.02em; min-width: 3ch; color: var(--chord, var(--accent));
  text-shadow: 0 0 16px color-mix(in srgb, var(--chord, var(--accent)) 60%, transparent); }
#chordNext { color: var(--muted); }
.ticker { position: relative; height: 64px; overflow: hidden; border-radius: 10px; background: var(--well); border: 1px solid var(--line);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent); }
.ticker .track { position: absolute; top: 0; left: 0; height: 100%; display: flex; will-change: transform; }
.ticker .tk { flex: none; width: 66px; height: 100%; display: flex; flex-direction: column; justify-content: center; padding-left: 8px;
  font-weight: 700; font-size: 1.05rem; color: var(--ink); cursor: pointer; border-left: 1px solid color-mix(in srgb, var(--ink) 7%, transparent); white-space: nowrap; }
.ticker .tk.bar { border-left: 2px solid color-mix(in srgb, var(--ink) 25%, transparent); }
.ticker .tk small { font-size: .65rem; color: var(--muted); font-weight: 500; line-height: 1; margin-bottom: 4px; min-height: .65rem; }
.ticker .tk.cont b { color: var(--muted); font-weight: 500; }
.ticker .tk.now b { color: var(--chord, var(--accent)); text-shadow: 0 0 12px var(--chord, var(--accent)); }
.ticker .marker { position: absolute; top: 0; bottom: 0; left: 30%; width: 2px; background: var(--chord, var(--accent));
  box-shadow: var(--glow) var(--chord, var(--accent)); }
.ticker .empty { position: absolute; inset: 0; display: flex; align-items: center; padding: 0 16px; color: var(--muted); font-size: .9rem; }
.views { display: flex; flex-wrap: wrap; gap: 8px 18px; margin: 12px 0 4px; }
.switch { display: inline-flex; align-items: center; gap: 8px; font-size: .9rem; color: var(--muted); }
.switch button { min-width: 3.2em; }
.gmode { margin-top: 8px; }
.chart { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 6px;
  max-height: 260px; overflow-y: auto; position: relative; margin-top: 8px; }
.bar { display: grid; grid-template-columns: repeat(4, 1fr); border-left: 2px solid var(--line); }
.cell { font: inherit; border: 0; border-radius: 4px; background: none; padding: 6px 2px; min-height: 34px; box-shadow: none;
  color: var(--ink); font-weight: 600; font-size: .95rem; text-align: left; cursor: pointer; }
.cell.cont { color: transparent; }
.cell.cont::after { content: "·"; color: var(--muted); }
.cell.now { background: var(--chord, var(--accent)); color: var(--accent-ink); }
.cell.now.cont { color: transparent; }
.cell.now.cont::after { color: var(--accent-ink); }

/* Bass tab */
.tab { display: flex; flex-wrap: wrap; gap: 10px 0; max-height: 300px; overflow-y: auto; margin-top: 8px; position: relative; }
.tabbar { margin: 0; padding: 6px 0; font: 13px/1.35 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: var(--muted);
  border-radius: 6px; cursor: pointer; white-space: pre; }
.tabbar.first { padding-left: 4px; }
.tab.bass { --t: var(--bass); } .tab.guitar { --t: var(--guitar); }
.tabbar b { color: var(--t); font-weight: 700; }
.tabbar.now { background: color-mix(in srgb, var(--t) 18%, transparent); color: var(--ink); }
.tabbar.now b { text-shadow: 0 0 10px var(--t); }

/* Lyrics */
.lyriclines { max-height: 240px; overflow-y: auto; margin-top: 8px; position: relative; }
.lyric { display: block; width: 100%; text-align: left; font: inherit; border: 0; background: none; color: var(--muted); box-shadow: none;
  padding: 4px 6px; border-radius: 6px; cursor: pointer; }
.lyric.now { color: var(--ink); background: var(--raised); font-weight: 600; }
.lyric .w.sung, .karaoke .w.sung { color: var(--vocals); text-shadow: 0 0 10px color-mix(in srgb, var(--vocals) 60%, transparent); }
.karaoke { background: var(--well); border: 1px solid var(--line); border-radius: 12px; padding: 20px 16px; margin-top: 10px; text-align: center; }
#kNow { font-size: 1.8rem; font-weight: 700; line-height: 1.3; margin: 0 0 8px; min-height: 2.3rem; }
#kNext { color: var(--muted); font-size: 1.1rem; margin: 0; min-height: 1.5rem; }
.lyricedit textarea { width: 100%; font: inherit; padding: 8px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--raised); color: var(--ink); resize: vertical; }
.lyricedit input { width: 100%; font: inherit; padding: 6px 8px; margin: 3px 0; border: 1px solid var(--line);
  border-radius: 6px; background: var(--raised); color: var(--ink); }
.lyricedit .seg { margin-top: 8px; }

/* Tracks: one row per stem with its own colored waveform */
.stem { padding: 10px 0; border-top: 1px solid var(--line); }
.stem:first-child { border-top: 0; }
.stemhead { display: grid; grid-template-columns: 12px 80px auto auto 1fr auto; align-items: center; gap: 10px; margin-bottom: 6px; }
.stem .dot { width: 12px; height: 12px; border-radius: 50%; background: var(--c); box-shadow: var(--glow) var(--c); }
.stem strong { color: var(--c); }
.stem button { padding: 4px 10px; }
.stem input[type=range] { accent-color: var(--c); }
.stem canvas.wave { height: 44px; }
.stem.silent canvas.wave { opacity: .3; }
.stem.silent strong { opacity: .5; }
@media (max-width: 520px) {
  .stemhead { grid-template-columns: 12px 1fr auto auto; }
  .stemhead input { grid-column: 2 / 4; }
  .stemhead [data-act=download] { grid-column: 4; }
  .ticker .tk { width: 56px; font-size: .9rem; padding-left: 5px; }
}

/* Song list */
.songrow { display: flex; align-items: center; gap: 12px; padding: 6px 0; border-top: 1px solid var(--line); }
.songrow a { flex: 1; color: var(--ink); }
#recent a { display: inline-block; margin: 8px 8px 0 0; color: var(--accent); }

.lyrichead { display: inline-flex; align-items: center; gap: 10px; }
.sa { color: var(--accent); text-shadow: 0 0 18px color-mix(in srgb, var(--accent) 70%, transparent); }

/* Bottom bar and appearance dialog */
.bottombar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px; margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--line); }
.bottombar select { padding: 6px 8px; font-size: .9rem; }
/* [Separate another song]  Save as  [Export mix]
   [User guide]                       [Appearance]   (phones: Save as gets its own middle row) */
.bottombar { display: grid; grid-template-columns: auto auto auto; justify-content: space-between;
  grid-template-areas: "new save export" "guide . look"; }
#newSong { grid-area: new; } .bottombar .saveas { grid-area: save; }
#exportMix { grid-area: export; justify-self: end; }
#guideBtn { grid-area: guide; justify-self: start; } #appearanceBtn { grid-area: look; justify-self: end; }
@media (max-width: 600px) {
  .bottombar { grid-template-columns: auto auto; grid-template-areas: "new export" "save save" "guide look"; }
  .bottombar .saveas { min-width: 0; } .bottombar select { min-width: 0; max-width: 100%; }
}
@media (max-width: 400px) { .bottombar button { padding-left: 10px; padding-right: 10px; font-size: .9rem; } .bottombar select { font-size: .8rem; } }
dialog#appearance { color: var(--ink); width: min(560px, calc(100vw - 32px)); max-height: calc(100vh - 32px); overflow-y: auto; margin: auto; }
dialog#appearance::backdrop { background: #000a; backdrop-filter: blur(3px); }
.schemes { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 8px; margin: 12px 0; }
.scheme { display: flex; flex-direction: column; gap: 6px; align-items: flex-start; padding: 10px; text-align: left; }
.scheme .swatches { display: flex; gap: 3px; }
.scheme .swatches i { width: 14px; height: 14px; border-radius: 50%; display: block; }
.colors { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px 16px; margin: 12px 0; }
.colors label { display: flex; align-items: center; gap: 8px; font-size: .9rem; }
.colors input[type=color] { width: 36px; height: 28px; border: 1px solid var(--line); border-radius: 6px; background: none; padding: 0; cursor: pointer; }
.dialogbtns { display: flex; width: 100%; margin-top: 8px; }