/* Music Beast 1.0.0 */
.music-beast { width: 100%; max-width: 780px; margin: 24px auto; }

.mb-app {
  --mb-bg: #0a0a12;
  --mb-panel: #12121f;
  --mb-line: rgba(255, 255, 255, .08);
  --mb-text: #eef0ff;
  --mb-muted: #8b8fa8;
  --mb-accent: #00e5ff;
  --mb-accent-rgb: 0, 229, 255;
  --mb-cols: 4;
  position: relative;
  box-sizing: border-box;
  padding: 20px;
  border: 1px solid var(--mb-line);
  border-radius: 22px;
  color: var(--mb-text);
  background:
    radial-gradient(900px 300px at 50% -10%, rgba(var(--mb-accent-rgb), .10), transparent),
    var(--mb-bg);
  box-shadow: 0 30px 80px -24px rgba(0, 0, 0, .7), inset 0 1px 0 rgba(255, 255, 255, .06);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans Bengali", sans-serif;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.mb-app *, .mb-app *::before, .mb-app *::after { box-sizing: border-box; }

.mb-theme-sunset { --mb-bg: #140a0d; --mb-accent: #ff7a59; --mb-accent-rgb: 255, 122, 89; }
.mb-theme-ocean  { --mb-bg: #05101a; --mb-accent: #19d3ff; --mb-accent-rgb: 25, 211, 255; }
.mb-theme-mono   { --mb-bg: #0c0c0e; --mb-accent: #e8eaf6; --mb-accent-rgb: 232, 234, 246; }

/* header */
.mb-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.mb-brand { display: flex; align-items: center; gap: 10px; font-size: 18px; letter-spacing: .02em; }
.mb-brand b { font-weight: 800; }
.mb-logo {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--mb-accent);
  box-shadow: 0 0 14px rgba(var(--mb-accent-rgb), .9), 0 0 32px rgba(var(--mb-accent-rgb), .5);
}
.mb-status { font-size: 13px; color: var(--mb-muted); }

/* visualizer */
.mb-viz {
  display: block; width: 100%; height: 74px; margin-bottom: 10px;
  border-radius: 12px; background: rgba(255, 255, 255, .03); border: 1px solid var(--mb-line);
}

/* step LEDs */
.mb-steps { display: grid; grid-template-columns: repeat(16, 1fr); gap: 5px; margin-bottom: 14px; }
.mb-led { height: 5px; border-radius: 3px; background: rgba(255, 255, 255, .08); transition: background .06s, box-shadow .06s; }
.mb-led-b { background: rgba(255, 255, 255, .15); }
.mb-led.on { background: var(--mb-accent); box-shadow: 0 0 10px rgba(var(--mb-accent-rgb), .9); }

/* banks */
.mb-banks { display: flex; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.mb-bank {
  position: relative; font: inherit; font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase;
  color: var(--mb-muted); padding: 7px 14px; border-radius: 999px; cursor: pointer;
  background: transparent; border: 1px solid var(--mb-line);
  transition: color .15s, background .15s, border-color .15s;
}
.mb-bank:hover { color: var(--mb-text); }
.mb-bank.is-sel { color: #0a0a12; background: var(--mb-accent); border-color: var(--mb-accent); box-shadow: 0 0 16px rgba(var(--mb-accent-rgb), .4); }
.mb-bank.has-active::after {
  content: ""; position: absolute; top: 3px; right: 5px; width: 6px; height: 6px; border-radius: 50%;
  background: var(--mb-accent); box-shadow: 0 0 8px rgba(var(--mb-accent-rgb), .9);
}
.mb-bank.is-sel.has-active::after { background: #0a0a12; box-shadow: none; }
.mb-bank:focus-visible { outline: 2px solid var(--mb-accent); outline-offset: 2px; }
.mb-pad[hidden] { display: none; }

/* pad grid */
.mb-grid {
  display: grid;
  grid-template-columns: repeat(var(--mb-cols), minmax(0, 1fr));
  gap: 12px;
}
.mb-pad {
  --c: #fff; --cr: 255, 255, 255;
  position: relative; overflow: hidden;
  aspect-ratio: 1 / 1; width: 100%; padding: 8px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px;
  color: var(--mb-text); font: inherit; font-weight: 700; font-size: 14px; letter-spacing: .03em;
  background: linear-gradient(160deg, rgba(var(--cr), .12), rgba(var(--cr), .03));
  border: 1px solid rgba(var(--cr), .30);
  border-radius: 16px;
  cursor: pointer; touch-action: manipulation;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .08), 0 8px 18px rgba(0, 0, 0, .4);
  transition: transform .08s ease, background .15s ease, box-shadow .15s ease, color .15s ease;
}
.mb-pad:hover { background: linear-gradient(160deg, rgba(var(--cr), .2), rgba(var(--cr), .06)); }
.mb-pad:active { transform: scale(.955); }
.mb-pad:focus-visible { outline: 2px solid var(--mb-accent); outline-offset: 3px; }

.mb-pad.is-on {
  color: #0a0a12;
  background: linear-gradient(160deg, rgba(var(--cr), .95), rgba(var(--cr), .55));
  border-color: rgba(var(--cr), 1);
  box-shadow: 0 0 0 1px rgba(var(--cr), .9), 0 0 30px rgba(var(--cr), .55), inset 0 1px 0 rgba(255, 255, 255, .45);
}
.mb-pad-led { width: 8px; height: 8px; border-radius: 50%; background: rgba(var(--cr), .5); }
.mb-pad.is-on .mb-pad-led { background: #0a0a12; opacity: .7; }
.mb-pad-name { line-height: 1.1; text-align: center; }
.mb-pad-key {
  position: absolute; right: 8px; bottom: 6px;
  font-size: 10px; font-weight: 700; opacity: .5; letter-spacing: .04em;
}
.mb-pad.mb-hit::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none;
  background: radial-gradient(circle at center, rgba(255, 255, 255, .55), rgba(var(--cr), .0) 70%);
  animation: mbHit .26s ease-out forwards;
}
@keyframes mbHit { from { opacity: 1; transform: scale(.6); } to { opacity: 0; transform: scale(1.25); } }

.mb-app.is-hit-mode .mb-grid .mb-pad { border-style: dashed; }

/* controls */
.mb-controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px 14px; margin-top: 18px; }
.mb-btn {
  font: inherit; font-size: 13px; font-weight: 700; color: var(--mb-text);
  padding: 9px 14px; border-radius: 10px; cursor: pointer;
  background: rgba(255, 255, 255, .06); border: 1px solid var(--mb-line);
  transition: background .15s, border-color .15s, transform .08s;
}
.mb-btn:hover { background: rgba(var(--mb-accent-rgb), .16); border-color: rgba(var(--mb-accent-rgb), .5); }
.mb-btn:active { transform: scale(.97); }
.mb-btn:focus-visible { outline: 2px solid var(--mb-accent); outline-offset: 2px; }
.mb-btn-sm { padding: 6px 11px; font-size: 15px; line-height: 1; }
.mb-btn-stop:hover { background: rgba(255, 70, 90, .2); border-color: rgba(255, 70, 90, .6); }

.mb-ctl { display: flex; align-items: center; gap: 8px; }
.mb-ctl label { font-size: 11px; font-weight: 800; letter-spacing: .12em; color: var(--mb-muted); }
.mb-out { min-width: 28px; font-size: 13px; font-weight: 800; text-align: right; font-variant-numeric: tabular-nums; }

.mb-range { -webkit-appearance: none; appearance: none; width: 120px; height: 24px; background: transparent; cursor: pointer; margin: 0; }
.mb-range::-webkit-slider-runnable-track { height: 4px; border-radius: 2px; background: rgba(255, 255, 255, .14); }
.mb-range::-moz-range-track { height: 4px; border-radius: 2px; background: rgba(255, 255, 255, .14); }
.mb-range::-webkit-slider-thumb {
  -webkit-appearance: none; width: 16px; height: 16px; margin-top: -6px; border-radius: 50%;
  background: var(--mb-accent); border: 0; box-shadow: 0 0 12px rgba(var(--mb-accent-rgb), .7);
}
.mb-range::-moz-range-thumb { width: 16px; height: 16px; border-radius: 50%; background: var(--mb-accent); border: 0; box-shadow: 0 0 12px rgba(var(--mb-accent-rgb), .7); }
.mb-range:focus-visible { outline: 2px solid var(--mb-accent); outline-offset: 2px; border-radius: 6px; }

@media (max-width: 560px) {
  .mb-app { padding: 14px; border-radius: 18px; }
  .mb-grid { grid-template-columns: repeat(min(var(--mb-cols), 3), minmax(0, 1fr)); gap: 9px; }
  .mb-pad { font-size: 12px; border-radius: 13px; }
  .mb-pad-key { display: none; }
  .mb-range { width: 96px; }
}

@media (prefers-reduced-motion: reduce) {
  .mb-pad, .mb-btn { transition: none; }
  .mb-pad.mb-hit::after { animation: none; }
}