/* music.css — THE MUSIC PAGE (src/MusicPage.jsx, 8 Nov 2026): the project's ONE music folder (work/music). The head (Music,
   the folder's path, Copy folder path + Open folder), then one panel per group with one row per track: play / pause, the
   name with a thin seek bar, length, size, date, Open in folder. Nothing moves when the list loads or a track starts
   (invariant 20): the body keeps a minimum height and every row keeps its seek bar's place. Every colour is a token
   (invariant 28); a skin repaints it, never resizes it. */
.view-page.mu-page { gap: 14px; }
.mu-audio { display: none; }

.mu-head { flex: none; display: flex; align-items: center; gap: 16px; padding: 2px 4px 0; }
.mu-head-text { flex: 1 1 auto; min-width: 0; }
.mu-title { margin: 0; font-family: var(--font-display); font-size: 40px; font-weight: normal; line-height: 1; letter-spacing: 0.01em; color: var(--ink); text-transform: uppercase; }
.mu-path {
  margin-top: 6px; min-height: 1.4em; font-family: var(--font-mono); font-size: var(--fs-12); line-height: 1.4;
  color: var(--sep-panel-ink-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.mu-head-btns { flex: none; display: flex; align-items: center; gap: 8px; }
.gen-go-btn.pmt-folder-btn.mu-folder-btn:disabled { opacity: 0.5; cursor: default; }
/* the Open folder place is always there (40 px), filled once the folder exists */
.mu-open-slot { flex: none; display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; }
.reveal-folder-btn.mu-open { width: 36px; height: 36px; }
.reveal-folder-btn.mu-open svg { width: 18px; height: 18px; }

.mu-body { flex: 1 1 auto; min-height: 240px; display: flex; flex-direction: column; gap: 14px; }
.mu-line { padding: 18px 8px; font-size: var(--fs-14); color: var(--sep-panel-ink-muted); }
.mu-line.is-small { padding: 10px 4px 2px; font-size: var(--fs-13); }

.mu-group {
  flex: none; box-sizing: border-box; padding: 14px 18px 16px; border-radius: var(--r-md); background: var(--sep-panel-fill);
  box-shadow: 0 0 0 var(--hairline-w, 1px) color-mix(in srgb, var(--ink) 10%, transparent), var(--shadow-card);
}
.mu-group-head { display: flex; align-items: baseline; gap: 12px; padding: 0 4px 8px; }
.mu-group-name { font-size: var(--fs-16); font-weight: var(--fw-semi); color: var(--ink); overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.mu-group-n { font-size: var(--fs-12); color: var(--sep-panel-ink-muted); white-space: nowrap; }

.mu-rows { display: flex; flex-direction: column; gap: 6px; }
.mu-row {
  display: grid; grid-template-columns: 36px minmax(0, 1fr) 96px 72px 104px 30px; align-items: center; gap: 14px;
  height: 52px; box-sizing: border-box; padding: 0 12px 0 8px; border-radius: var(--r-sm); background: var(--sep-row-fill);
}
.mu-row.is-on { background: var(--sep-card-fill); box-shadow: inset 0 0 0 var(--hairline-w, 1px) color-mix(in srgb, var(--leaf) 45%, transparent); }
.mu-play {
  display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px; padding: 0;
  border: 1px solid color-mix(in srgb, var(--leaf) 55%, transparent); border-radius: var(--r-round);
  background: color-mix(in srgb, var(--leaf) 14%, transparent); color: var(--ink); cursor: pointer;
}
.mu-play:hover { background: color-mix(in srgb, var(--leaf) 26%, transparent); }
.mu-play.is-playing { background: var(--cta-bg); color: var(--cta-ink); border-color: transparent; }
.mu-main { min-width: 0; display: flex; flex-direction: column; justify-content: center; gap: 6px; }
.mu-name { font-size: var(--fs-14); font-weight: var(--fw-semi); color: var(--ink); overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.mu-seek { position: relative; height: 4px; border-radius: var(--r-round); background: color-mix(in srgb, var(--ink) 14%, transparent); cursor: pointer; touch-action: none; }
.mu-seek.is-idle { visibility: hidden; }
.mu-seek-fill { position: absolute; left: 0; top: 0; bottom: 0; border-radius: var(--r-round); background: var(--leaf); }
.mu-len, .mu-size, .mu-date { font-size: var(--fs-13); color: var(--sep-panel-ink-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mu-len { font-variant-numeric: tabular-nums; text-align: right; }
.mu-size { text-align: right; }
.mu-reveal { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; }

@media (max-width: 720px) {
  .mu-row { grid-template-columns: 36px minmax(0, 1fr) 84px 30px; gap: 10px; }
  .mu-size, .mu-date { display: none; }
}