/* =========================================================
   Life OS — midi.css  (🎹 MIDI Center, pages/midi-center.js)
   ========================================================= */
.midi {
  --c-chords: #8b5cf6; --c-melody: #2a78d6; --c-bass: #14a38b; --c-drums: #eb6834;
  --mr-bar: color-mix(in srgb, var(--text) 26%, transparent);
  --mr-beat: color-mix(in srgb, var(--text) 12%, transparent);
  --mr-step: color-mix(in srgb, var(--text) 5%, transparent);
  min-width: 0;
}
.midi .btn-small { margin: 0; }
.midi-top { margin-bottom: 10px; }
.midi-top-row { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.midi-play { min-width: 92px; font-size: 0.95rem; padding: 7px 14px; border-radius: 999px; }
.midi-play.on { background: var(--danger); border-color: var(--danger); }
.midi-grow { flex: 1; }
.midi-name { width: 180px; max-width: 100%; font-weight: 600; }
.midi-help { margin: 8px 0 0; font-size: 0.8rem; color: var(--text-muted); }

/* Setup row */
.midi-setup { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 10px 14px; padding: 10px 12px; margin-bottom: 12px;
  border: 1px solid var(--border); border-radius: 14px; background: var(--panel); }
.midi-field { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.midi-field-label { font-size: 0.7rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.04em; }
.midi-select { width: auto; max-width: 220px; }
.midi-bpm { width: 72px; }
.midi-seg { width: auto; }
.midi-seg .seg-btn { padding: 5px 12px; white-space: nowrap; }
.midi-range-wrap { display: inline-flex; align-items: center; gap: 6px; }
.midi-range { width: 96px; accent-color: var(--accent); }
.midi-range-val { font-size: 0.78rem; color: var(--text-muted); min-width: 22px; font-variant-numeric: tabular-nums; }
.midi-keyname { margin-left: auto; font-weight: 600; color: var(--text-muted); font-size: 0.85rem; align-self: center; }

/* A part's panel */
.midi-part { border-left: 4px solid var(--pc, var(--border)); }
.midi-p-chords { --pc: var(--c-chords); }
.midi-p-melody { --pc: var(--c-melody); }
.midi-p-bass { --pc: var(--c-bass); }
.midi-p-drums { --pc: var(--c-drums); }
.midi-part.is-muted > :not(.dash-panel-head) { opacity: 0.45; }
.midi-part .dash-panel-head { align-items: center; }
.midi-ctrls, .midi-extra { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.midi-ctrls .midi-select { font-size: 0.8rem; padding: 3px 6px; }
.midi-toggle { min-width: 32px; justify-content: center; }
.midi-toggle.on { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.midi-vol { width: 70px; accent-color: var(--pc, var(--accent)); }
.midi-dice { font-weight: 600; }
.midi-hint { font-size: 0.76rem; color: var(--text-faint); margin-top: 6px; }

/* Chord cards */
.midi-chords { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.midi-chords.eight { grid-template-columns: repeat(8, minmax(0, 1fr)); }
.midi-chord {
  position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px;
  min-height: 74px; padding: 8px 4px; border-radius: 12px; cursor: pointer; color: var(--text);
  border: 1px solid color-mix(in srgb, var(--c-chords) 35%, var(--border));
  background: color-mix(in srgb, var(--c-chords) 9%, var(--panel));
  transition: transform var(--dur) var(--ease), background var(--dur);
}
.midi-chord:hover { background: color-mix(in srgb, var(--c-chords) 16%, var(--panel)); }
.midi-chord.now { background: color-mix(in srgb, var(--c-chords) 30%, var(--panel)); transform: translateY(-2px); }
.midi-chord-bar { position: absolute; top: 4px; left: 8px; font-size: 0.65rem; color: var(--text-faint); }
.midi-chord-name { font-size: 1.15rem; font-weight: 700; letter-spacing: -0.01em; }
.midi-chord-roman { font-size: 0.75rem; color: var(--text-muted); }
@container (max-width: 640px) {
  .midi-chords.eight { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .midi-chord { min-height: 60px; }
  .midi-chord-name { font-size: 1rem; }
}
.midi-chord-menu { width: min(360px, 88vw); }
.midi-chord-menu .pop-row { display: flex; gap: 6px; flex-wrap: wrap; }
.midi-chord-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); gap: 5px; }
.midi-chip { display: flex; flex-direction: column; align-items: center; gap: 1px; padding: 5px 4px; border-radius: 8px; cursor: pointer;
  border: 1px solid var(--border); background: var(--panel); color: var(--text); font-size: 0.8rem; }
.midi-chip small { color: var(--text-muted); font-size: 0.68rem; }
.midi-chip:hover { background: var(--hover); }
.midi-chip.active { border-color: var(--c-chords); background: color-mix(in srgb, var(--c-chords) 14%, var(--panel)); }

/* Note grid (piano roll) */
.mroll-scroll { overflow-x: auto; overflow-y: hidden; border: 1px solid var(--border); border-radius: 10px; background: var(--bg-soft); max-width: 100%; }
.mroll-inner { display: grid; grid-template-columns: 40px max-content; width: max-content; }
.mroll-corner, .mroll-keys { position: sticky; left: 0; z-index: 3; background: var(--panel); border-right: 1px solid var(--border); }
.mroll-corner { height: 20px; border-bottom: 1px solid var(--border); }
.mroll-lane { display: flex; height: 20px; border-bottom: 1px solid var(--border); background: var(--panel); }
.mroll-lane-chord { flex: 0 0 auto; font-size: 0.72rem; font-weight: 600; padding: 2px 6px; color: var(--c-chords); border-left: 1px solid var(--mr-bar); white-space: nowrap; overflow: hidden; }
.mroll-key { font-size: 0.6rem; line-height: 15px; padding: 0 4px; color: var(--text-faint); white-space: nowrap; text-align: right; }
.mroll-key.is-root { color: var(--text); font-weight: 700; background: color-mix(in srgb, var(--pc) 10%, transparent); }
.mroll-key.is-out { font-style: italic; }
.mroll-grid {
  position: relative; cursor: crosshair; touch-action: pan-x pan-y; user-select: none;
  background-image:
    linear-gradient(to right, var(--mr-bar) 0 1px, transparent 1px),
    linear-gradient(to right, var(--mr-beat) 0 1px, transparent 1px),
    linear-gradient(to right, var(--mr-step) 0 1px, transparent 1px);
}
.mroll-row { position: absolute; left: 0; right: 0; pointer-events: none; }
.mroll-row.is-root { background: color-mix(in srgb, var(--pc) 9%, transparent); }
.mroll-row.is-out { background: repeating-linear-gradient(45deg, transparent 0 4px, color-mix(in srgb, var(--text) 5%, transparent) 4px 6px); }
.mroll-note {
  position: absolute; height: 13px; margin-top: 1px; border-radius: 4px; cursor: grab;
  background: var(--pc); box-shadow: inset 0 0 0 1px color-mix(in srgb, #000 18%, transparent);
}
.mroll-note::after { content: ''; position: absolute; right: 0; top: 0; bottom: 0; width: 5px; cursor: ew-resize; border-radius: 0 4px 4px 0; background: color-mix(in srgb, #fff 30%, transparent); }
.mroll-note.glide { background-image: linear-gradient(to right, color-mix(in srgb, #fff 45%, transparent), transparent 60%); }
.mroll-head { position: absolute; top: 0; left: 0; width: 2px; background: var(--danger); transform: translateX(-10px); pointer-events: none; z-index: 2; }

/* Drum grid */
.mdrum-scroll { overflow-x: auto; max-width: 100%; }
.mdrum { display: flex; flex-direction: column; gap: 3px; width: max-content; min-width: 100%; }
.mdrum-row { display: grid; grid-template-columns: 112px 1fr; align-items: center; gap: 6px; }
.mdrum-label { display: flex; align-items: center; gap: 2px; position: sticky; left: 0; background: var(--panel); z-index: 1; }
.mdrum-name { flex: 1; text-align: left; border: 0; background: transparent; color: var(--text); font-size: 0.8rem; padding: 3px 4px; border-radius: 6px; cursor: pointer; }
.mdrum-name:hover, .mdrum-dice:hover { background: var(--hover); }
.mdrum-dice { border: 0; background: transparent; cursor: pointer; font-size: 0.75rem; padding: 3px 4px; border-radius: 6px; opacity: 0.6; }
.mdrum-cells { display: grid; grid-template-columns: repeat(32, minmax(20px, 1fr)); gap: 2px; }
.mdrum-cell {
  height: 24px; border-radius: 4px; border: 1px solid var(--border); cursor: pointer; padding: 0;
  background: var(--bg-soft); font-size: 0.6rem; color: #fff; font-weight: 700;
}
.mdrum-cell.beat { background: color-mix(in srgb, var(--text) 7%, var(--bg-soft)); }
.mdrum-cell.bar2 { margin-left: 4px; }
.mdrum-cell.v1 { background: color-mix(in srgb, var(--c-drums) 38%, var(--panel)); }
.mdrum-cell.v2 { background: color-mix(in srgb, var(--c-drums) 75%, var(--panel)); }
.mdrum-cell.v3 { background: var(--c-drums); border-color: color-mix(in srgb, var(--c-drums) 60%, #000); }
.mdrum-cell.v4, .mdrum-cell.v6 { background: color-mix(in srgb, var(--c-drums) 75%, var(--panel)); }
.mdrum-cell.now { outline: 2px solid var(--text); outline-offset: -2px; }
.mdrum-row:has(.mdrum-cell.v3) .mdrum-cell.v3 { box-shadow: inset 0 -3px 0 color-mix(in srgb, #000 22%, transparent); }

/* Play & record */
.midi-keys { display: flex; flex-direction: column; gap: 10px; }
.midi-keys-row { display: flex; align-items: flex-end; gap: 10px 14px; flex-wrap: wrap; }
.midi-oct { display: inline-flex; align-items: center; gap: 6px; }
.midi-oct-val { min-width: 22px; text-align: center; font-variant-numeric: tabular-nums; }
.midi-rec.on { background: var(--danger); color: #fff; border-color: var(--danger); }
.midi-comp { margin: 0; align-self: center; }
.midi-piano { --wk: calc(100% / var(--whites)); --bk: calc(100% / var(--whites) * 0.62); position: relative; display: flex; height: 112px; user-select: none; touch-action: none; }
.midi-key { padding: 0; cursor: pointer; font-size: 0.6rem; color: var(--text-faint); }
.midi-key.white { flex: 1; border: 1px solid var(--border); border-radius: 0 0 6px 6px; background: #fff; display: flex; align-items: flex-end; justify-content: center; padding-bottom: 4px; }
.midi-key.black { position: absolute; top: 0; width: var(--bk); height: 62%; z-index: 1; border: 0; border-radius: 0 0 4px 4px; background: #222; }
.midi-key.white.down, .midi-key.white:active { background: color-mix(in srgb, var(--c-melody) 30%, #fff); }
.midi-key.black.down, .midi-key.black:active { background: var(--c-melody); }

/* Ideas + export menus */
.midi-ideas { width: min(340px, 88vw); max-height: 60vh; overflow-y: auto; }
.midi-idea { display: flex; align-items: center; gap: 2px; border-radius: 8px; }
.midi-idea.active { background: var(--accent-soft); }
.midi-idea-open { flex: 1; min-width: 0; display: flex; flex-direction: column; align-items: flex-start; gap: 1px; text-align: left; border: 0; background: transparent; color: var(--text); padding: 6px 8px; border-radius: 8px; cursor: pointer; }
.midi-idea-open:hover { background: var(--hover); }
.midi-idea-open small { color: var(--text-muted); font-size: 0.72rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; }
.midi-style-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 6px; }
.midi-style { display: flex; align-items: center; gap: 8px; padding: 8px; border: 1px solid var(--border); border-radius: 10px; background: var(--panel); color: var(--text); cursor: pointer; font-size: 0.84rem; text-align: left; }
.midi-style:hover { background: var(--hover); }
.midi-style-icon { font-size: 1.3rem; }
.midi-export { width: min(340px, 88vw); }
.midi-export .pop-row { display: flex; gap: 6px; flex-wrap: wrap; }

@media (max-width: 600px) {
  .midi-name { width: 100%; order: 5; }
  .midi-grow { display: none; }
  .midi-keyname { margin-left: 0; width: 100%; }
  .mdrum-row { grid-template-columns: 84px 1fr; }
}