/* ── SYNTH 8-BIT ── */
.synth-wrap {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 1.6rem 1.4rem;
  position: relative;
  overflow: hidden;
}
.synth-wrap::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(212, 160, 74, 0.005) 3px,
    rgba(212, 160, 74, 0.005) 4px
  );
}

.synth-display {
  background: var(--code);
  border: 1px solid var(--border);
  border-radius: 8px;
  height: 60px;
  margin-bottom: 1rem;
  position: relative;
  overflow: hidden;
}
.synth-wave {
  width: 100%;
  height: 100%;
  display: block;
}

.synth-keys {
  display: flex;
  gap: 3px;
  justify-content: center;
}
.synth-key {
  width: 36px;
  height: 80px;
  border-radius: 0 0 6px 6px;
  border: 1px solid var(--border);
  background: rgba(240, 230, 211, 0.06);
  cursor: pointer;
  transition: all 0.08s ease;
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 0.4rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.45rem;
  color: var(--cream3);
  user-select: none;
  -webkit-user-select: none;
}
.synth-key:hover {
  background: rgba(240, 230, 211, 0.1);
  border-color: rgba(94, 207, 160, 0.15);
}
.synth-key:active,
.synth-key.active {
  background: rgba(94, 207, 160, 0.15);
  border-color: var(--teal);
  color: var(--teal);
  transform: scaleY(0.97);
  box-shadow: 0 0 12px rgba(94, 207, 160, 0.15);
}

.synth-controls {
  display: flex;
  justify-content: center;
  gap: 0.8rem;
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border);
}
.synth-wave-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.52rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--cream3);
  cursor: pointer;
  transition: all 0.2s;
}
.synth-wave-btn:hover {
  border-color: rgba(94, 207, 160, 0.15);
  color: var(--cream2);
}
.synth-wave-btn.active {
  border-color: var(--teal-dim);
  color: var(--teal);
  background: rgba(94, 207, 160, 0.06);
}

.synth-hint {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.48rem;
  color: var(--cream3);
  opacity: 0.5;
  text-align: center;
  margin-top: 0.6rem;
  letter-spacing: 0.06em;
}

/* Tunes section */
.synth-tunes {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border);
}
.synth-tunes-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.52rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cream3);
  margin-bottom: 0.5rem;
}
.synth-tunes-row {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.synth-tune-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.52rem;
  letter-spacing: 0.04em;
  padding: 0.3rem 0.7rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--cream3);
  cursor: pointer;
  transition: all 0.2s;
}
.synth-tune-btn:hover {
  border-color: rgba(212, 160, 74, 0.25);
  color: var(--amber);
  background: rgba(212, 160, 74, 0.06);
}
.synth-tune-btn.playing {
  border-color: var(--amber);
  color: var(--amber);
  background: rgba(212, 160, 74, 0.1);
  animation: tunePulse 1.5s ease-in-out infinite;
}
.synth-tune-btn.strudel-btn {
  border-color: rgba(94, 207, 160, 0.15);
  color: var(--teal);
}
.synth-tune-btn.strudel-btn:hover {
  border-color: rgba(94, 207, 160, 0.35);
  background: rgba(94, 207, 160, 0.06);
}
.synth-tune-btn.strudel-btn.playing {
  border-color: var(--teal);
  background: rgba(94, 207, 160, 0.1);
  animation: tunePulse 1.5s ease-in-out infinite;
}
@keyframes tunePulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.65; }
}

/* Strudel visual grid */
.strudel-grid-wrap {
  margin-top: 0.8rem;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--code);
}
.strudel-grid {
  width: 100%;
  height: 140px;
  display: block;
}
.strudel-credit {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.48rem;
  color: var(--cream3);
  opacity: 0.45;
  text-align: center;
  margin-top: 0.5rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  font-style: italic;
}

@media (max-width: 500px) {
  .synth-key {
    width: 28px;
    height: 65px;
    font-size: 0.4rem;
  }
  .synth-keys {
    gap: 2px;
  }
}