/* ═══════════════════════════════════════════════════════════════
   DRUM KIT VISUALIZER — Tamil Bookshelf MIDI Player
   drums-visualizer.css  v4.0.0  (2026-05-19)

   Three-canvas stack:
     #drum-bg-canvas    – static warm-wood background
     #drum-viz-canvas   – kit images, sticks, heatmap
     #drum-trail-canvas – translucent hit-trail overlay
   ═══════════════════════════════════════════════════════════════ */

/* ── OUTER CONTAINER ── */
#midiPlayerInterface {
  margin: 14px 0;
}

#staff-visualizer {
  background: linear-gradient(160deg, #0d0a06 0%, #1a1208 60%, #0f0c08 100%);
    border: 1px solid var(--border2, rgba(201, 148, 58, 0.25));
    border-radius: 14px;
    overflow: hidden;
    height: 520px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.65), 0 6px 28px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(201, 148, 58, 0.09);
	background: url(../images/bg.jpg) no-repeat center bottom;
    background-size: cover;
}

#keyboard-container {
  display: block;
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

/* ── THREE-CANVAS STACK ── */
#drum-bg-canvas {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 13px;
  z-index: 1;
}

#drum-viz-canvas {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 13px;
  z-index: 2;
  cursor: default;           /* updated to 'pointer' by JS on hover */
}

#drum-trail-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  border-radius: 13px;
  z-index: 3;
  opacity: 0.55;
  mix-blend-mode: screen;    /* trails glow on top of images */
}

/* ── BADGE (kit name, top-right) ── */
.drum-viz-badge {
  position: absolute;
  top: 12px;
  right: 16px;
  background: rgba(0,0,0,0.62);
  border: 1px solid rgba(201,148,58,0.28);
  border-radius: 20px;
  padding: 4px 13px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.68rem;
  color: var(--gold, #ffc768);
  letter-spacing: 0.6px;
  backdrop-filter: blur(8px);
  pointer-events: none;
  z-index: 10;
  transition: opacity 0.3s;
}

/* ── CURRENT-NOTE READOUT (bottom-centre) ── */
.drum-note-readout {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.62);
  border: 1px solid rgba(201,148,58,0.2);
  border-radius: 8px;
  padding: 5px 20px;
  font-family: 'Cormorant Garamond', serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--gold, #ffc768);
  letter-spacing: 1.2px;
  pointer-events: none;
  z-index: 10;
  backdrop-filter: blur(6px);
  min-width: 130px;
  text-align: center;
  transition: color 0.22s;
  white-space: nowrap;
}

/* ── HIT FLASH OVERLAY ── */
.drum-hit-flash {
  position: absolute;
  inset: 0;
  border-radius: 13px;
  pointer-events: none;
  z-index: 8;
  opacity: 0;
  background: radial-gradient(ellipse at center,
    rgba(201,148,58,0.14) 0%,
    transparent 68%);
  transition: opacity 0.07s ease-out;
}
.drum-hit-flash.active { opacity: 1; }

/* ── NOTE POPUP LABEL ── */
.drum-note-popup {
  position: absolute;
  color: #0d0a08;
  font-family: 'Outfit', sans-serif;
  font-size: 0.62rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  pointer-events: none;
  white-space: nowrap;
  z-index: 25;
  transform: translate(-50%, -150%);
  animation: drumNotePopIn 0.12s ease-out forwards;
  box-shadow: 0 2px 12px rgba(0,0,0,0.5);
}
@keyframes drumNotePopIn {
  from { transform: translate(-50%, -115%) scale(0.4); opacity: 0; }
  to   { transform: translate(-50%, -150%) scale(1);   opacity: 1; }
}

/* ── KIT LOADING INDICATOR ── */
.drum-kit-loader {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 5px;
  background: rgba(0,0,0,0.62);
  border: 1px solid rgba(201,148,58,0.22);
  border-radius: 20px;
  padding: 5px 14px;
  z-index: 12;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s;
}
.drum-kit-loader.visible { opacity: 1; }

.drum-loader-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold, #ffc768);
  animation: drumDotPulse 1.1s ease-in-out infinite;
}
.drum-loader-dot:nth-child(1) { animation-delay: 0s;    }
.drum-loader-dot:nth-child(2) { animation-delay: 0.18s; }
.drum-loader-dot:nth-child(3) { animation-delay: 0.36s; }

@keyframes drumDotPulse {
  0%,80%,100% { transform: scale(0.6); opacity: 0.35; }
  40%          { transform: scale(1.2); opacity: 1;    }
}

/* ── KIT SELECTOR ROW ── */
.drum-kit-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px 0;
  flex-wrap: wrap;
}

.drum-kit-label {
  font-family: 'Outfit', sans-serif;
  font-size: 0.75rem;
  color: var(--text-muted, #888);
  text-transform: uppercase;
  letter-spacing: 1px;
  flex-shrink: 0;
}

.drum-kit-pill {
  padding: 4px 13px;
  border: 1px solid var(--border2, rgba(201,148,58,0.25));
  border-radius: 20px;
  background: rgba(13,10,8,0.9);
  color: var(--text-dim, #d1cfcf);
  font-family: 'Outfit', sans-serif;
  font-size: 0.75rem;
  cursor: pointer;
  transition: border-color 0.18s, color 0.18s, background 0.18s, box-shadow 0.18s;
  white-space: nowrap;
}
.drum-kit-pill:hover {
  border-color: var(--gold, #ffc768);
  color: var(--gold, #ffc768);
  box-shadow: 0 0 8px rgba(201,148,58,0.18);
}
.drum-kit-pill.active {
  background: var(--gold, #ffc768);
  color: #0d0a08;
  border-color: var(--gold, #ffc768);
  font-weight: 600;
  box-shadow: 0 0 12px rgba(201,148,58,0.35);
}

/* ── SEPARATOR ── */
.drum-view-sep {
  width: 1px;
  height: 18px;
  background: rgba(201,148,58,0.22);
  margin: 0 4px;
  flex-shrink: 0;
}

/* ── VELOCITY STRIP (reserved) ── */
.drum-vel-strip {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 5px;
  background: transparent;
  z-index: 18;
  pointer-events: none;
  display: flex;
  gap: 2px;
  padding: 0 6px;
}
.drum-vel-bar {
  flex: 1;
  border-radius: 2px 2px 0 0;
  background: transparent;
  transition: background 0.1s, height 0.1s;
  height: 100%;
  align-self: flex-end;
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  #staff-visualizer    { height: 280px; border-radius: 10px; }
  .drum-viz-badge      { font-size: 0.58rem; padding: 3px 9px; }
  .drum-note-readout   { font-size: 0.82rem; min-width: 96px; padding: 4px 12px; }
  .drum-kit-row        { padding: 6px 14px 0; gap: 6px; }
  .drum-kit-pill       { font-size: 0.68rem; padding: 3px 9px; }
  .drum-kit-label      { font-size: 0.65rem; }
}

@media (max-width: 480px) {
  #staff-visualizer    { height: 210px; }
  .drum-note-readout   { display: none; }
  .drum-kit-label      { display: none; }
  .drum-view-sep       { display: none; }
  .drum-kit-loader     { display: none; }
}