/* ---------- The piano page: keyboard, grand staff, metronome and stopwatch ---------- */
.legend { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.legend-item { display: flex; align-items: center; gap: 5px; font-size: 11px; color: #666; }
.legend-sw { width: 14px; height: 8px; border-radius: 2px; opacity: 0.75; }

/* Scroll wrapper: lets the browser pan; taps vs swipes are told apart in JS */
.piano-scroll {
  overflow-x: scroll;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  touch-action: manipulation;
  padding-bottom: 8px;
  margin-bottom: 16px;
  cursor: grab;
}
.piano-scroll:active { cursor: grabbing; }

.piano-wrap { position: relative; display: inline-block; }
.wkey {
  position: absolute;
  background: #fff;
  border: 0.5px solid #ccc;
  border-radius: 0 0 4px 4px;
  cursor: pointer;
  display: flex; flex-direction: column; justify-content: flex-end; align-items: center;
  padding-bottom: 4px;
  -webkit-tap-highlight-color: transparent;
  /* Allow swipes that start on a key to scroll the keyboard */
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}
.wkey .nlabel { font-size: 8px; color: #999; pointer-events: none; line-height: 1; }
.wkey:hover { background: #ddeeff; }
.wkey.pressed { background: #a8ccf0 !important; }
.bkey {
  position: absolute;
  background: #222;
  border-radius: 0 0 4px 4px;
  cursor: pointer;
  z-index: 3;
  display: flex; align-items: flex-end; justify-content: center;
  padding-bottom: 3px;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}
.bkey .nlabel { font-size: 7px; color: #aaa; pointer-events: none; line-height: 1; }
.bkey:hover { background: #444; }
.bkey.pressed { background: #4a90d9 !important; }

/* Two groups: [Start, time signature, beat dots] and [−, bpm, slider, +].
   On a wide screen they share one line; on a phone the tempo group drops
   to its own full-width line and never splits apart. */
.metro-row { display: flex; align-items: center; gap: 12px 16px; flex-wrap: wrap; }
.metro-main { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.metro-tempo { display: flex; align-items: center; gap: 8px; flex: 1 1 240px; min-width: 0; }
.bpm-readout { display: flex; align-items: baseline; gap: 3px; flex-shrink: 0; }
.play-btn { display: flex; align-items: center; gap: 6px; padding: 8px 16px; border: 1px solid #ddd; border-radius: 8px; background: #fff; color: #333; cursor: pointer; font-size: 14px; }
.play-btn:hover { background: #f0f0f0; }
.play-btn.active { background: #e8f0fe; border-color: #4a90d9; color: #1a5fb4; }
.adj-btn { width: 32px; height: 32px; border: 1px solid #ddd; border-radius: 8px; background: #fff; color: #333; cursor: pointer; font-size: 18px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.adj-btn:hover { background: #f0f0f0; }
.bpm-num { font-size: 22px; font-weight: 500; min-width: 40px; text-align: right; font-variant-numeric: tabular-nums; }
.bpm-lbl { font-size: 11px; color: #888; }
.bpm-slider { flex: 1; min-width: 60px; accent-color: #4a90d9; }
.ts-select { padding: 6px 10px; border: 1px solid #ddd; border-radius: 8px; background: #fff; color: #333; font-size: 13px; cursor: pointer; }
.beats-row { display: flex; gap: 7px; align-items: center; }
.beat-dot { width: 10px; height: 10px; border-radius: 50%; background: #ddd; transition: background 0.04s; }
.beat-dot.lit { background: #4a90d9; }
.current-note { font-size: 14px; color: #555; margin-bottom: 6px; min-height: 20px; font-weight: 500; }
canvas { max-width: 100%; display: block; }

/* Stopwatch */
.sw-display { font-size: 40px; font-weight: 300; text-align: center; font-variant-numeric: tabular-nums; color: #222; margin: 4px 0 12px; }
.sw-row { display: flex; justify-content: center; gap: 12px; }
.sw-btn { min-width: 100px; padding: 10px 16px; border: 1px solid #ddd; border-radius: 8px; background: #fff; color: #333; font-size: 15px; cursor: pointer; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
.sw-btn:hover:not(:disabled) { background: #f0f0f0; }
.sw-btn:disabled { color: #bbb; cursor: default; }
.sw-btn.active { background: #e8f0fe; border-color: #4a90d9; color: #1a5fb4; }
.sw-laps { list-style: none; margin-top: 12px; max-height: 170px; overflow-y: auto; }
.sw-laps li { display: flex; justify-content: space-between; gap: 12px; padding: 7px 2px; border-top: 0.5px solid #eee; font-size: 14px; font-variant-numeric: tabular-nums; }
.sw-laps .sw-total { color: #999; }