/* ==========================================================================
   ARITHMOPULSE — HARDWARE COMPONENTS: KNOBS, STEP BUTTONS & CRT DISPLAY
   ========================================================================== */

/* --------------------------------------------------------------------------
   Osciloscópio CRT (Display de Tubo de Raios Catódicos)
   -------------------------------------------------------------------------- */
.crt-display-panel {
  display: flex;
  justify-content: flex-end;
}

.crt-frame {
  position: relative;
  width: 280px;
  height: 96px;
  background: #020604;
  border: 2px solid #1e293b;
  border-radius: 8px;
  box-shadow: inset 0 0 15px rgba(0, 0, 0, 0.9), 0 2px 6px rgba(0, 0, 0, 0.7);
  overflow: hidden;
}

#crt-oscilloscope {
  display: block;
  width: 100%;
  height: 100%;
}

.crt-scanlines {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    rgba(0, 0, 0, 0.25) 0px,
    rgba(0, 0, 0, 0.25) 1px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  opacity: 0.7;
}

.crt-badge {
  position: absolute;
  bottom: 4px;
  right: 8px;
  font-family: var(--font-mono);
  font-size: 7px;
  letter-spacing: 0.12em;
  color: rgba(0, 255, 160, 0.45);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   Knobs Analógicos Interativos (Rotary Controls)
   -------------------------------------------------------------------------- */
.knob-unit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.knob-label {
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #94a3b8;
  text-align: center;
}

.knob-wrapper {
  position: relative;
  width: 44px;
  height: 44px;
  cursor: ns-resize;
}

.knob-dial {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #334155 0%, #0f172a 100%);
  border: 2px solid #475569;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.8), inset 0 1px 1px rgba(255, 255, 255, 0.3);
  position: relative;
  transition: transform 0.05s ease-out;
}

.knob-indicator {
  position: absolute;
  top: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 10px;
  background-color: var(--led-cyan);
  border-radius: 1px;
  box-shadow: 0 0 6px var(--led-cyan);
}

.knob-val {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--led-amber);
  text-align: center;
  min-width: 36px;
}

/* --------------------------------------------------------------------------
   Drum Machine 16-Step Grid (Estilo TR-808/909)
   -------------------------------------------------------------------------- */
.drum-sequencer-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--panel-inset);
  padding: 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.step-ruler-row {
  display: flex;
  align-items: center;
  margin-bottom: 4px;
}

.drum-label-cell {
  width: 140px;
  font-family: var(--font-mono);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #64748b;
}

.step-leds-bar {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
}

.step-led {
  height: 6px;
  border-radius: 3px;
  background: var(--led-off);
  transition: background-color 0.05s, box-shadow 0.05s;
}

.step-led.active-playhead {
  background: var(--led-amber);
  box-shadow: 0 0 10px var(--led-amber), 0 0 2px #fff;
}

/* Linha de Dígitos Correspondentes */
.step-digits-row {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
}

.step-digits-bar {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
}

.step-digit-badge {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--led-cyan);
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  padding: 2px 0;
  border-radius: 4px;
  transition: all 0.15s ease;
}

.step-digit-badge.high-digit {
  color: var(--led-amber);
  border-color: rgba(255, 183, 3, 0.4);
  background: rgba(255, 183, 3, 0.12);
}

.step-digit-badge.current-step {
  border-color: #fff;
  color: #fff;
  background: rgba(255, 255, 255, 0.25);
  box-shadow: 0 0 8px #fff;
}

.drum-track-row {
  display: flex;
  align-items: center;
}

.track-header-cell {
  width: 140px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-right: 12px;
}

.voice-name {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: #cbd5e1;
}

.voice-controls {
  display: flex;
  gap: 4px;
}

.track-mute-btn, .track-audition-btn {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: #1e2638;
  color: #94a3b8;
  font-size: 8px;
  font-family: var(--font-mono);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.track-mute-btn.muted {
  background: var(--led-red);
  color: #fff;
  border-color: var(--led-red);
}

.step-buttons-row {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
}

/* Botões de Passos 808 Coloridos por Grupos de 4 */
.step-trigger-btn {
  height: 36px;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: #161e2e;
  cursor: pointer;
  position: relative;
  transition: all 0.1s ease;
}

/* Cores Clássicas Roland 808 por Bloco de 4 Passos */
.step-trigger-btn:nth-child(4n+1),
.step-trigger-btn:nth-child(4n+2),
.step-trigger-btn:nth-child(4n+3),
.step-trigger-btn:nth-child(4n+4) {
  border-bottom: 3px solid rgba(0, 0, 0, 0.5);
}

/* Bloco 1 (Passos 1-4): Vermelho Alaranjado */
.step-trigger-btn:nth-child(-n+4) {
  background: #25161c;
}
/* Bloco 2 (Passos 5-8): Amarelo Âmbar */
.step-trigger-btn:nth-child(n+5):nth-child(-n+8) {
  background: #272115;
}
/* Bloco 3 (Passos 9-12): Branco Quente */
.step-trigger-btn:nth-child(n+9):nth-child(-n+12) {
  background: #222730;
}
/* Bloco 4 (Passos 13-16): Vermelho Alaranjado */
.step-trigger-btn:nth-child(n+13):nth-child(-n+16) {
  background: #25161c;
}

.step-trigger-btn:hover {
  filter: brightness(1.3);
}

/* Estado Ativo: LED Interno Aceso */
.step-trigger-btn.active {
  box-shadow: inset 0 0 10px rgba(0, 242, 254, 0.5);
  border-color: var(--led-cyan);
}

.step-trigger-btn.active::after {
  content: '';
  position: absolute;
  inset: 4px;
  border-radius: 2px;
  background: var(--led-cyan);
  box-shadow: 0 0 8px var(--led-cyan);
}

.step-trigger-btn.current-step {
  outline: 2px solid var(--led-amber);
}

/* --------------------------------------------------------------------------
   Módulo Acid 303 (Seletor de Forma de Onda e Notas de 16 Passos)
   -------------------------------------------------------------------------- */
.acid-module-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.acid-waveform-selector {
  display: flex;
  gap: 6px;
}

.wave-btn {
  background: #1e2638;
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #94a3b8;
  padding: 4px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10px;
  cursor: pointer;
}

.wave-btn.active {
  border-color: var(--led-amber);
  color: var(--led-amber);
  background: rgba(255, 183, 3, 0.12);
}

.acid-knobs-section {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: var(--panel-inset);
  padding: 12px;
  border-radius: 8px;
}

.acid-steps-container {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.acid-steps-label {
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 0.1em;
  color: #64748b;
}

.acid-step-slots {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
}

.acid-slot {
  background: var(--panel-inset);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  padding: 6px 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  transition: var(--transition-fast);
}

.acid-slot.current-step {
  border-color: var(--led-amber);
  box-shadow: 0 0 10px rgba(255, 183, 3, 0.3);
}

.acid-digit-tag {
  font-family: var(--font-mono);
  font-size: 7px;
  color: #64748b;
}

.acid-note-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  color: var(--led-cyan);
}

.acid-accent-toggle {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: transparent;
  cursor: pointer;
}

.acid-accent-toggle.active {
  background: var(--led-amber);
  box-shadow: 0 0 6px var(--led-amber);
  border-color: var(--led-amber);
}

/* --------------------------------------------------------------------------
   Módulo Poly Synth & Chords
   -------------------------------------------------------------------------- */
.poly-module-body {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.poly-knobs-section {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background: var(--panel-inset);
  padding: 12px;
  border-radius: 8px;
}

.poly-sequence-display {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
}

.poly-chord-card {
  background: var(--panel-inset);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 6px;
  padding: 8px 4px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.poly-chord-card.current-step {
  border-color: var(--led-cyan);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

.poly-chord-name {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  color: #a5b4fc;
}

.poly-digit-source {
  font-size: 7px;
  color: #64748b;
  font-family: var(--font-mono);
}