/* Music Box — pinned drum sequencer. Full-bleed canvas. */
*,
*::before,
*::after { box-sizing: border-box; }

html, body {
  -webkit-tap-highlight-color: transparent;
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #1a2440;
  font-family: "Archivo", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  touch-action: none;
  overscroll-behavior: none;
}

#canvas { position: fixed; inset: 0; width: 100%; height: 100%; display: block; cursor: pointer; }

.controls {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 96vw;
}
.ctrl-btn {
  appearance: none;
  font-family: inherit;
  font-size: 0.66rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #ffe8c9;
  background: rgba(20, 29, 56, 0.6);
  border: 1px solid rgba(255, 210, 150, 0.32);
  padding: 8px 13px;
  border-radius: 999px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: border-color 140ms ease, color 140ms ease;
}
.ctrl-btn:hover { border-color: rgba(255, 210, 150, 0.7); }
.ctrl-btn[aria-pressed="false"] { color: #7f8bb0; }

.frame { position: fixed; inset: 0; z-index: 4; pointer-events: none; }
.frame__corner {
  position: absolute;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 232, 201, 0.5);
}
.frame__corner--tl { top: max(14px, env(safe-area-inset-top)); left: 16px; }
.frame__corner--tr { top: max(14px, env(safe-area-inset-top)); right: 16px; }
.frame__corner--bl { bottom: 14px; left: 16px; }
.frame__corner a { color: inherit; text-decoration: none; pointer-events: auto; }
.frame__corner a:hover { color: #ffd28c; }

.hint {
  position: fixed;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  margin: 0;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: rgba(255, 232, 201, 0.5);
  pointer-events: none;
  white-space: nowrap;
  transition: opacity 300ms ease;
}
.hint.is-gone { opacity: 0; }

@media (max-width: 560px) {
  .frame__corner--bl, .hint { display: none; }
  .ctrl-btn { font-size: 0.6rem; padding: 7px 10px; }
}