/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:          #fdf6ee;
  --surface:     #ffffff;
  --surface2:    #f0e9df;
  --border:      #ddd0c4;
  --accent:      #ff6b35;
  --accent2:     #ffb703;
  --text:        #2d2016;
  --text-dim:    #9e8a78;
  --bin-hover:   #e03c3c;
  --radius:      14px;
  --tray-h:      110px;
  --ctrl-h:      56px;
  --gap:         14px;
  --pad:         16px;
}

html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: 'Nunito', 'Segoe UI', system-ui, sans-serif;
  user-select: none;
}

/* ── Soft dotted background ── */
body {
  background-image: radial-gradient(circle, #e8d8c8 1.5px, transparent 1.5px);
  background-size: 28px 28px;
  background-color: var(--bg);
}

/* ── Controls ── */
#controls {
  position: fixed;
  top: var(--pad);
  right: var(--pad);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 100;
}

.control-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--text-dim);
  margin-right: 2px;
}

.control-group {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}

.row-buttons {
  display: flex;
  gap: 4px;
}

.row-btn {
  width: 34px; height: 34px;
  border-radius: 9px;
  border: 2px solid var(--border);
  background: var(--surface2);
  color: var(--text-dim);
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: all .15s ease;
  font-family: inherit;
}

.row-btn:hover {
  color: var(--text);
  border-color: var(--accent);
}

.row-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

#btn-fullscreen, #btn-undo, #btn-clear {
  width: 44px; height: 44px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}

#btn-fullscreen svg, #btn-undo svg, #btn-clear svg { width: 18px; height: 18px; }

#btn-fullscreen:hover { color: var(--accent); border-color: var(--accent); }
#btn-undo:hover       { color: var(--accent); border-color: var(--accent); }
#btn-clear:hover      { color: var(--bin-hover); border-color: var(--bin-hover); }

#btn-undo:disabled { opacity: .3; cursor: default; }
#btn-undo:disabled:hover { color: var(--text-dim); border-color: var(--border); }

/* ── Board ── */
#board {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: var(--tray-h);
  padding: var(--pad);
  display: flex;
  align-items: center;
  justify-content: center;
}

#board-grid {
  display: grid;
  gap: var(--gap);
  align-content: center;
  justify-content: center;
}

/* Placeholder */
#placeholder-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(18px, 3vw, 28px);
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--text-dim);
  opacity: .35;
  pointer-events: none;
  transition: opacity .3s;
}

#placeholder-text.hidden { opacity: 0; }

/* ── Drop placeholder (shown during drag only) ── */
.drop-placeholder {
  border-radius: var(--radius);
  border: 3px dashed var(--accent);
  background: rgba(255,107,53,.07);
  box-sizing: border-box;
  transition: width .18s ease, height .18s ease;
}

/* ── Tiles ── */
.tile {
  border-radius: 14px;
  border: 3px solid rgba(0,0,0,.08);
  overflow: hidden;
  cursor: grab;
  box-shadow: 0 4px 12px rgba(0,0,0,.12), 0 1px 3px rgba(0,0,0,.08);
  transition: width .18s ease, height .18s ease, box-shadow .15s, transform .15s;
  background: var(--surface);
  touch-action: none;
  box-sizing: border-box;
  flex-shrink: 0;
}

.tile:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 24px rgba(0,0,0,.15);
}

.tile:active { cursor: grabbing; }

.tile img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
}

/* Tile inner content (no image) */
.tile-inner {
  width: 100%; height: 100%;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 6px;
  pointer-events: none;
}

.tile-letter {
  font-weight: 900;
  line-height: 1;
  transition: font-size .18s ease;
}

.tile-name {
  font-size: clamp(9px, 1.2vw, 13px);
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* ── Tray ── */
#tray {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--tray-h);
  background: var(--surface);
  border-top: 2px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 calc(var(--tray-h) + 24px) 0 var(--pad);
  z-index: 50;
  box-shadow: 0 -2px 12px rgba(0,0,0,.06);
}

#tray-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 100%;
  padding: 10px 0;
}

.tray-tile {
  height: calc(var(--tray-h) - 24px);
  aspect-ratio: 1;
  border-radius: 12px;
  border: 3px solid var(--border);
  overflow: hidden;
  cursor: grab;
  background: var(--surface2);
  box-shadow: 0 3px 10px rgba(0,0,0,.1);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  touch-action: none;
  transition: transform .15s, box-shadow .15s;
}

.tray-tile:hover {
  transform: translateY(-4px) scale(1.04);
  box-shadow: 0 8px 20px rgba(0,0,0,.15);
}

.tray-tile img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  pointer-events: none;
}

.tray-tile.dragging {
  opacity: .5;
  cursor: grabbing;
}

.tray-tile .tile-inner {
  width: 100%; height: 100%;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 4px;
  pointer-events: none;
}

.tray-tile .tile-letter { font-size: clamp(18px, 2.5vw, 30px); font-weight: 900; line-height: 1; }
.tray-tile .tile-name   { font-size: 10px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }

/* ── Bin ── */
#bin {
  position: fixed;
  bottom: calc((var(--tray-h) - 60px) / 2);
  right: var(--pad);
  width: 60px; height: 60px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--surface);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  transition: all .2s ease;
  cursor: default;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}

#bin svg { width: 24px; height: 24px; color: var(--text-dim); transition: color .2s; }

#bin.active {
  border-color: var(--bin-hover);
  background: rgba(224,60,60,.1);
  transform: scale(1.1);
}

#bin.active svg { color: var(--bin-hover); }

/* ── Modal ── */
#modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  pointer-events: none;
}

#modal.hidden { display: none; }

#modal-box {
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: 20px;
  padding: 22px 40px;
  box-shadow: 0 8px 40px rgba(0,0,0,.15);
  animation: modal-in .25s ease;
}

#modal-msg {
  font-size: clamp(15px, 2vw, 20px);
  font-weight: 800;
  color: var(--accent);
  letter-spacing: .02em;
}

@keyframes modal-in {
  from { transform: scale(.88); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}


/* ═══════════════════════════════════════════
   PART 2 — RHYTHM MODULE STYLES
═══════════════════════════════════════════ */

/* ── Mode toggle button ── */
#btn-mode {
  width: 44px; height: 44px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}
#btn-mode svg { width: 18px; height: 18px; }
#btn-mode:hover { color: #7048e8; border-color: #7048e8; }
#btn-mode.active {
  background: #7048e8;
  color: #fff;
  border-color: #7048e8;
}

/* ── Rhythm mode controls bar ── */
#rhythm-controls {
  position: fixed;
  top: var(--pad);
  left: var(--pad);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 100;
}
#rhythm-controls.hidden { display: none; }

#btn-mode-back, #btn-play, #btn-fullscreen-r {
  width: 44px; height: 44px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}
#btn-mode-back svg, #btn-play svg, #btn-fullscreen-r svg { width: 18px; height: 18px; }
#btn-mode-back:hover  { color: var(--accent); border-color: var(--accent); }
#btn-fullscreen-r:hover { color: var(--accent); border-color: var(--accent); }

#btn-play {
  width: 52px; height: 52px;
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
#btn-play:hover { background: #e55520; border-color: #e55520; }
#btn-play.playing {
  background: #e03c3c;
  border-color: #e03c3c;
}
#btn-play svg { width: 20px; height: 20px; }

/* ── Tempo control ── */
#tempo-group {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 6px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}
#tempo-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 120px;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
#tempo-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,.2);
  cursor: pointer;
}
#tempo-slider:disabled { opacity: .4; cursor: default; }
#tempo-slider:disabled::-webkit-slider-thumb { cursor: default; }
#tempo-display {
  font-size: 14px;
  font-weight: 800;
  color: var(--text);
  min-width: 28px;
  text-align: right;
  font-family: inherit;
}

/* ── Rhythm mode: board state ── */
body.rhythm-mode #tray  { display: none; }
body.rhythm-mode #bin   { display: none; }
body.rhythm-mode #board { bottom: 0; }

/* ── Tile note overlay ── */
.note-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 38%;
  background: linear-gradient(to top, rgba(255,255,255,.88) 60%, rgba(255,255,255,0));
  display: flex;
  align-items: flex-end;
  pointer-events: none;
  border-radius: 0 0 12px 12px;
  overflow: hidden;
}
.note-overlay canvas {
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 100%;
}

/* ── Active tile during playback ── */
.tile.rhythm-active {
  border-color: var(--accent) !important;
  box-shadow: 0 0 0 3px var(--accent), 0 6px 20px rgba(255,107,53,.35) !important;
  transform: translateY(-2px) scale(1.02) !important;
  z-index: 2;
}
.tile.rhythm-dim {
  opacity: 0.45;
  transition: opacity .2s;
}

/* ── Bouncing ball ── */
#bounce-ball {
  position: fixed;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid #fff;
  box-shadow: 0 4px 16px rgba(255,107,53,.5);
  pointer-events: none;
  z-index: 500;
  /* position set directly by rAF — no CSS transition */
}
#bounce-ball.hidden { display: none; }

/* ── No-rhythm warning on tile ── */
.no-rhythm-badge {
  position: absolute;
  top: 5px; right: 5px;
  width: 20px; height: 20px;
  background: #e03c3c;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px;
  color: #fff;
  pointer-events: none;
  font-weight: 900;
  line-height: 1;
  z-index: 3;
}

/* ── Toggle buttons (repeat / show-notes / show-syls) ── */
.toggle-btn {
  width: 44px; height: 44px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}
.toggle-btn svg { width: 18px; height: 18px; }
.toggle-btn:hover { color: var(--text); border-color: var(--accent); }
.toggle-btn.on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 2px 12px rgba(255,107,53,.35);
}

/* ═══════════════════════════════════════════
   WHITEBOARD LAYER
═══════════════════════════════════════════ */

/* The canvas covers the entire viewport, above everything */
#wb-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 800;
  pointer-events: none;     /* off by default — enabled when whiteboard active */
  cursor: crosshair;
}

#wb-canvas.active {
  pointer-events: all;
}

#wb-canvas.eraser-mode {
  cursor: none;             /* hide cursor — custom eraser circle shown instead */
}

/* Whiteboard toggle button — same style as other control buttons */
#btn-wb {
  width: 44px; height: 44px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  background: var(--surface);
  color: var(--text-dim);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s ease;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}
#btn-wb svg { width: 18px; height: 18px; }
#btn-wb:hover { color: #7048e8; border-color: #7048e8; }
#btn-wb.active {
  background: #7048e8;
  color: #fff;
  border-color: #7048e8;
  box-shadow: 0 2px 12px rgba(112,72,232,.35);
}

/* Floating whiteboard toolbar — bottom-centre of screen */
#wb-toolbar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 40px;
  padding: 8px 14px;
  box-shadow: 0 4px 24px rgba(0,0,0,.15);
  z-index: 900;
}
#wb-toolbar.hidden { display: none; }

.wb-tool, #wb-clear {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all .15s ease;
}
.wb-tool svg, #wb-clear svg { width: 18px; height: 18px; }

.wb-tool:hover, #wb-clear:hover {
  background: var(--surface2);
  color: var(--text);
}
.wb-tool.active {
  background: #7048e8;
  color: #fff;
  border-color: #7048e8;
}
#wb-clear:hover {
  color: var(--bin-hover);
}

/* Eraser cursor circle — follows mouse via JS */
#wb-eraser-cursor {
  position: fixed;
  border-radius: 50%;
  border: 2px solid rgba(0,0,0,0.5);
  background: rgba(255,255,255,0.25);
  pointer-events: none;
  z-index: 900;
  display: none;
  transform: translate(-50%, -50%);
}