/* ============================================
   R.I.T.H.M - Synthesizer Styles
   ============================================ */

.synth-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem;
}

@media (min-width: 1024px) {
  .synth-container {
    max-width: 1300px;
  }
}

.synth-header {
  text-align: center;
  margin-bottom: 2rem;
}

.synth-header h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.synth-header p {
  color: var(--text-secondary);
}

/* ── Keyboard Wrapper ────────────────────── */

.keyboard-wrapper {
  position: relative;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--input-bg);
  border-radius: 10px;
  padding: 2rem;
  margin-bottom: 2rem;
}

/* ── Visualizer ──────────────────────────── */

.visualizer-container {
  margin-bottom: 1rem;
  border-radius: 10px;
  overflow: hidden;
  background: linear-gradient(180deg, #0f172a 0%, #1a1a2e 100%);
  border: 1px solid rgba(74, 158, 111, 0.15);
}

#visualizer {
  display: block;
  width: 100%;
  height: 80px;
}

/* ── Keyboard Container ──────────────────── */

#key_container {
  position: relative;
  height: 220px;
  max-width: 100%;
  background: linear-gradient(180deg, #1a1a2e 0%, #16213e 100%);
  border-radius: 10px;
  overflow: hidden;
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3);
  margin: 0 auto 1.5rem;
}

.white_note {
  float: left;
  height: 100%;
  width: 55px;
  background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
  border-right: 1px solid #cbd5e1;
  border-radius: 0 0 8px 8px;
  transition: background 0.1s ease;
  cursor: pointer;
}

.white_note:hover {
  background: linear-gradient(180deg, #f1f5f9 0%, #e2e8f0 100%);
}

.white_note:active, .white_note.active {
  background: linear-gradient(180deg, #cbd5e1 0%, #94a3b8 100%);
}

.black_note {
  position: absolute;
  top: 0;
  height: 60%;
  width: 35px;
  z-index: 2;
  background: linear-gradient(180deg, #1e293b 0%, #0f172a 100%);
  border-radius: 0 0 6px 6px;
  transition: background 0.1s ease;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.black_note:hover {
  background: linear-gradient(180deg, #334155 0%, #1e293b 100%);
}

.black_note:active, .black_note.active {
  background: linear-gradient(180deg, #475569 0%, #334155 100%);
}

/* ── Controls Row ────────────────────────── */

.controls-row {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.control-group {
  flex: 1;
  min-width: 160px;
}

.control-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.section-label {
  margin-bottom: 0.75rem;
}

/* ── Synth Selector ──────────────────────── */

.synth-controls {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.synth-btn {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.synth-btn:hover {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.synth-btn.active {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-color: transparent;
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(74, 158, 111, 0.3);
}

/* ── Slider Row ──────────────────────────── */

.slider-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.slider-row input[type="range"] {
  flex: 1;
}

/* ── Custom Range Input ──────────────────── */

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--input-bg);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 0 6px rgba(74, 158, 111, 0.4);
  transition: box-shadow 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
  box-shadow: 0 0 12px rgba(74, 158, 111, 0.6);
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
  box-shadow: 0 0 6px rgba(74, 158, 111, 0.4);
}

input[type="range"]:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

input[type="range"]:disabled::-webkit-slider-thumb {
  background: var(--text-muted);
  box-shadow: none;
}

input[type="range"]:disabled::-moz-range-thumb {
  background: var(--text-muted);
  box-shadow: none;
}

.param-value {
  font-size: 0.8rem;
  color: var(--text-muted);
  min-width: 50px;
  text-align: right;
  font-family: 'Space Grotesk', monospace;
}

/* ── Octave Controls ─────────────────────── */

.octave-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.octave-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  font-size: 0.8rem;
}

.octave-btn:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}

.octave-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

#octave-display {
  font-family: 'Space Grotesk', monospace;
  font-size: 0.9rem;
  color: var(--text-primary);
  min-width: 70px;
  text-align: center;
}

/* ── Section Divider ─────────────────────── */

.section-divider {
  height: 1px;
  background: var(--border-color);
  margin: 1.25rem 0;
}

/* ── Envelope Controls ───────────────────── */

.envelope-controls {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.envelope-param {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.envelope-param label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-weight: 600;
}

.envelope-param input[type="range"] {
  width: 100%;
}

.envelope-param .param-value {
  min-width: unset;
  text-align: center;
}

/* ── Effects Rack ────────────────────────── */

.effects-rack {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.effect-unit {
  background: var(--input-bg);
  border-radius: 10px;
  padding: 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.effect-unit.active {
  border-color: var(--primary);
}

.effect-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.effect-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.effect-unit.active .effect-name {
  color: var(--text-primary);
}

.effect-toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  transition: all 0.2s ease;
}

.effect-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.effect-toggle.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.effect-unit input[type="range"] {
  width: 100%;
}

/* ── Recording Controls ──────────────────── */

.recording-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.rec-btn {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.85rem;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.rec-btn:hover:not(:disabled) {
  border-color: var(--text-muted);
  color: var(--text-primary);
}

.rec-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.rec-btn.recording {
  background: rgba(239, 68, 68, 0.15);
  border-color: var(--danger);
  color: var(--danger);
}

.rec-btn.recording .fa-circle {
  animation: pulse-recording 1s infinite;
}

.rec-btn.playing {
  background: rgba(90, 173, 122, 0.15);
  border-color: var(--success);
  color: var(--success);
}

@keyframes pulse-recording {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.rec-status {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: 'Space Grotesk', monospace;
  margin-left: auto;
}

/* ── Instructions ────────────────────────── */

.synth-container .instructions {
  background: var(--surface-primary);
  border: 1px solid rgba(74, 158, 111, 0.2);
  border-radius: 10px;
  padding: 1rem 1.5rem;
  text-align: center;
}

.synth-container .instructions h5 {
  color: var(--primary);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.synth-container .instructions p {
  color: var(--text-secondary);
  margin: 0;
  font-size: 0.9rem;
}

.synth-container .instructions kbd {
  background: var(--input-bg);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-family: 'Space Grotesk', monospace;
  margin: 0 0.1rem;
}

/* ── Tutorial Banner ─────────────────────── */

.synth-container .tutorial-banner {
  margin-bottom: 1.5rem;
  border-radius: 10px;
  background: var(--surface-primary);
  border: 1px solid rgba(74, 158, 111, 0.25);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.synth-container .tutorial-banner:hover {
  border-color: rgba(74, 158, 111, 0.5);
  background: rgba(74, 158, 111, 0.1);
}

.tutorial-banner-link {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
  font-size: 0.95rem;
}

.tutorial-banner-link .fa-book-open {
  color: var(--primary);
  font-size: 1.1rem;
}

.tutorial-banner-arrow {
  margin-left: auto;
  color: var(--primary);
  transition: transform 0.2s ease;
}

.synth-container .tutorial-banner:hover .tutorial-banner-arrow {
  transform: translateX(3px);
}

/* ── Compact Layout ──────────────────────── */

@media (max-height: 768px) {
  .synth-container { padding: 1rem; }
  .synth-header { margin-bottom: 1rem; }
  .synth-header h1 { font-size: 1.5rem; }
  .keyboard-wrapper { padding: 1.25rem; margin-bottom: 1rem; }
}

/* ── Responsive ──────────────────────────── */

@media (max-width: 768px) {
  .effects-rack {
    grid-template-columns: repeat(2, 1fr);
  }
  .envelope-controls {
    grid-template-columns: repeat(2, 1fr);
  }
  .controls-row {
    flex-direction: column;
    gap: 1rem;
  }
}