/* ============================================================================
   S1Vave Hardware Controller & Monitor - Stylesheet
   Aesthetic: Hardware Synth Dark Graphite / Emerald Teal / Filter Orange
   ============================================================================ */

:root {
  --bg-deep: #0e1012;
  --bg-chassis: #15181b;
  --bg-panel: #1c2024;
  --bg-control: #252b31;
  --bg-hover: #30373f;
  
  --border-subtle: #2b323a;
  --border-prominent: #3d4652;
  
  --accent-teal: #00e6a8;
  --accent-teal-glow: rgba(0, 230, 168, 0.4);
  --accent-teal-dark: #008762;
  
  --accent-orange: #ff6a18;
  --accent-orange-glow: rgba(255, 106, 24, 0.4);
  --accent-orange-dark: #a83d00;
  
  --accent-red: #ff3344;
  --accent-red-glow: rgba(255, 51, 68, 0.4);
  
  --led-on: #00ffbc;
  --led-off: #0b3d30;
  --led-s1: #ff6a18;
  --led-fm1: #00e6a8;
  
  --text-primary: #f0f4f8;
  --text-secondary: #9aa5b1;
  --text-muted: #5e6977;
  
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-display: 'Orbitron', monospace;

  --shadow-panel: 0 4px 20px rgba(0, 0, 0, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  --shadow-key-white: 0 4px 6px rgba(0,0,0,0.5), inset 0 -3px 0 #b0b5be, inset 0 1px 0 #ffffff;
  --shadow-key-black: 0 3px 6px rgba(0,0,0,0.8), inset 0 -2px 0 #222, inset 0 1px 0 #555;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

body {
  background-color: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 13px;
  line-height: 1.4;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* App Container */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  max-width: 1720px;
  margin: 0 auto;
  width: 100%;
}

/* ============================================================================
   1. App Header & Routing Controls
   ============================================================================ */
.app-header {
  background: linear-gradient(180deg, #1f2429 0%, #15181b 100%);
  border-bottom: 2px solid var(--border-subtle);
  padding: 12px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.5);
  z-index: 20;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.logo-badge {
  background: #000;
  border: 1px solid var(--accent-teal);
  color: var(--accent-teal);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 4px;
  letter-spacing: 1.5px;
  box-shadow: 0 0 12px var(--accent-teal-glow);
  text-shadow: 0 0 8px var(--accent-teal);
}

.brand-text h1 {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #fff;
  text-transform: uppercase;
  margin: 0;
}

.brand-text .subtitle {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 1px;
}

.nav-sim-link {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-teal);
  background: #111e19;
  border: 1px solid #1a4233;
  padding: 5px 10px;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.nav-sim-link:hover {
  background: #1a3c2e;
  border-color: var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal-glow);
  color: #fff;
}

/* Target Controls & A/B Toggle */
.target-controls {
  display: flex;
  align-items: center;
  background: #111316;
  border: 1px solid var(--border-subtle);
  padding: 6px 10px;
  border-radius: 6px;
  gap: 10px;
}

.target-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.target-btn-group {
  display: flex;
  gap: 4px;
}

.target-btn {
  background: #1c2127;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.target-btn .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #333d47;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.8);
  transition: all 0.15s ease;
}

.target-btn:hover {
  background: #252c34;
  color: #fff;
}

.target-btn.active {
  background: #202b28;
  border-color: var(--accent-teal);
  color: #fff;
  box-shadow: 0 0 8px var(--accent-teal-glow);
}

.target-btn.active .dot {
  background: var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal);
}

.target-btn#btnS1.active {
  background: #301f17;
  border-color: var(--accent-orange);
  box-shadow: 0 0 8px var(--accent-orange-glow);
}
.target-btn#btnS1.active .dot {
  background: var(--accent-orange);
  box-shadow: 0 0 8px var(--accent-orange);
}

.ab-toggle-btn {
  background: linear-gradient(180deg, #ff6a18 0%, #ba4402 100%);
  color: #fff;
  border: 1px solid #ff8843;
  padding: 6px 14px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1px;
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(255, 106, 24, 0.4);
  transition: all 0.15s ease;
}

.ab-toggle-btn:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 12px var(--accent-orange-glow);
}

.ab-toggle-btn:active {
  transform: translateY(1px);
  filter: brightness(0.9);
}

/* MIDI Status Panel */
.midi-status-panel {
  display: flex;
  align-items: center;
  gap: 12px;
}

.device-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #111417;
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: 4px;
}

.status-indicator {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #444c56;
  transition: all 0.2s ease;
}

.status-indicator.connected {
  background: var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal);
}

.status-indicator.s1-color.connected {
  background: var(--accent-orange);
  box-shadow: 0 0 8px var(--accent-orange);
}

.dev-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}

.port-select {
  background: #1a1e24;
  border: 1px solid var(--border-subtle);
  color: #fff;
  font-size: 11px;
  padding: 3px 6px;
  border-radius: 3px;
  outline: none;
  max-width: 130px;
  cursor: pointer;
}

/* ============================================================================
   1.5 USB Audio Monitor & Router
   ============================================================================ */
.audio-monitor-bar {
  background: #14171a;
  border-bottom: 2px solid #232a32;
  padding: 10px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.audio-mon-left {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.audio-mon-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--accent-orange);
  display: flex;
  align-items: center;
  gap: 6px;
}

.audio-mode-group {
  display: flex;
  gap: 4px;
}

.audio-mode-btn {
  background: #1e242b;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 5px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.audio-mode-btn .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #36414c;
  transition: all 0.15s ease;
}

.audio-mode-btn:hover {
  background: #272f38;
  color: #fff;
}

.audio-mode-btn.active {
  background: #1a3026;
  border-color: var(--accent-teal);
  color: #fff;
  box-shadow: 0 0 8px var(--accent-teal-glow);
}

.audio-mode-btn.active .dot {
  background: var(--accent-teal);
  box-shadow: 0 0 6px var(--accent-teal);
}

.audio-mode-btn#btnAudS1.active {
  background: #352117;
  border-color: var(--accent-orange);
  box-shadow: 0 0 8px var(--accent-orange-glow);
}

.audio-mode-btn#btnAudS1.active .dot {
  background: var(--accent-orange);
  box-shadow: 0 0 6px var(--accent-orange);
}

.audio-mode-btn.mute.active {
  background: #3a1518;
  border-color: var(--accent-red);
  color: #ff9999;
  box-shadow: 0 0 8px var(--accent-red-glow);
}

.audio-mon-levels {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.audio-vol-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #0f1214;
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: 4px;
}

.audio-vol-box label {
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  white-space: nowrap;
}

.audio-vol-box label span {
  color: var(--accent-teal);
}

.audio-slider {
  width: 70px !important;
  margin: 0 !important;
}

.audio-mon-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.audio-mon-right label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--text-muted);
}

.sink-select {
  background: #111417;
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  outline: none;
  max-width: 200px;
  cursor: pointer;
}

/* ============================================================================
   Logo Badge Branding (Authentic S1VAVE Brand Colors)
   ============================================================================ */
.logo-badge {
  background: #000;
  border: 1px solid #1a2228;
  padding: 4px 10px;
  border-radius: 4px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 2px;
  display: flex;
  align-items: center;
  box-shadow: 0 0 14px rgba(0, 230, 168, 0.2);
}
.logo-s1, .logo-ve { color: #f2f6fa; }
.logo-v { color: #00e5a3; text-shadow: 0 0 8px rgba(0, 229, 163, 0.6); }
.logo-a {
  color: #f2f6fa;
  position: relative;
  display: inline-block;
}
.logo-notch {
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  height: 5px;
  background: #00e5a3;
  border-radius: 1px;
}

/* ============================================================================
   Action Toolbar (Performance & Patch Operations)
   ============================================================================ */
.action-toolbar {
  background: #14171a;
  border-bottom: 2px solid #232a32;
  padding: 8px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.toolbar-left, .toolbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.toolbar-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.preset-nav-cluster {
  display: flex;
  align-items: center;
  gap: 5px;
}

.preset-step-btn {
  padding: 5px 9px !important;
  font-size: 10px !important;
}

.preset-select {
  background: #0f1215;
  border: 1px solid var(--border-prominent);
  color: #00ffbc;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 11px;
  padding: 5px 8px;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
  min-width: 155px;
  max-width: 190px;
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.6);
  transition: all 0.15s ease;
}

.preset-select:hover, .preset-select:focus {
  border-color: var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal-glow);
}

.preset-select option {
  background: #14171a;
  color: #f2f6fa;
}

.toolbar-divider {
  width: 1px;
  height: 22px;
  background: #252d36;
  margin: 0 4px;
}

.tool-action-btn {
  background: #1c2127;
  color: var(--text-primary);
  border: 1px solid var(--border-prominent);
  padding: 6px 11px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06);
}

.tool-action-btn:hover {
  background: #272f38;
  border-color: var(--accent-teal);
  color: #fff;
  box-shadow: 0 0 8px var(--accent-teal-glow);
}

.tool-action-btn.monitor-toggle.active {
  background: #162c24;
  border-color: var(--accent-teal);
  color: #00ffbc;
  box-shadow: 0 0 10px var(--accent-teal-glow);
}

.tool-action-btn.read-synth-btn {
  background: #112a22;
  border-color: var(--accent-teal);
  color: #00ffbc;
  font-weight: 700;
  box-shadow: 0 0 8px rgba(0, 229, 163, 0.25);
}

.tool-action-btn.read-synth-btn:hover {
  background: #194034;
  color: #ffffff;
  box-shadow: 0 0 14px rgba(0, 229, 163, 0.5);
}

/* ============================================================================
   Real-Time Monitoring Deck (Audio Levels, Oscilloscope, MIDI Traffic)
   ============================================================================ */
.monitoring-deck {
  background: #0f1214;
  border-bottom: 2px solid var(--border-subtle);
  padding: 12px 20px;
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 16px;
  transition: all 0.25s ease;
}

.monitoring-deck.collapsed {
  display: none;
}

.audio-bottom-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}

.audio-bottom-row .audio-vol-box {
  flex: 1;
}

.vu-meters-block.single-synth {
  display: flex;
  gap: 4px;
  align-items: center;
  background: #0b0d0e;
  border: 1px solid var(--border-subtle);
  padding: 4px 6px;
  border-radius: 4px;
  height: 48px;
}

.vu-meters-block.single-synth .vu-track {
  height: 32px;
  width: 9px;
}

.vu-meters-block.single-synth .ch-label {
  font-size: 8px;
}

.scope-wrapper.compact {
  width: 180px;
  height: 48px;
}

.monitor-card {
  background: #171b1f;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}

.card-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--accent-teal);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Audio Sound Card Pass-Through Button */
.audio-passthrough-btn {
  background: #15241e;
  border: 1px solid var(--accent-teal);
  color: #00ffbc;
  padding: 6px 12px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  box-shadow: 0 0 10px rgba(0, 229, 163, 0.2);
}

.audio-passthrough-btn .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal);
}

.audio-passthrough-btn:not(.active) {
  background: #1c2127;
  border-color: #3b4550;
  color: var(--text-muted);
  box-shadow: none;
}

.audio-passthrough-btn:not(.active) .dot {
  background: #475569;
  box-shadow: none;
}

.audio-passthrough-btn:hover {
  filter: brightness(1.15);
}

.audio-device-grid {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.device-select-box {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.device-select-box label {
  font-size: 9px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.device-select-box .sink-select {
  width: 100%;
  max-width: 100%;
  background: #0f1215;
  border: 1px solid var(--border-prominent);
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

.device-select-box .sink-select:focus, .device-select-box .sink-select:hover {
  border-color: var(--accent-teal);
}

.audio-slider-grid {
  display: flex;
  gap: 6px;
  justify-content: space-between;
}

/* Meters & Oscilloscope */
.meter-scope-container {
  display: flex;
  gap: 12px;
  align-items: center;
  height: 90px;
}

.vu-meters-block {
  display: flex;
  gap: 6px;
  align-items: center;
  background: #0b0d0e;
  border: 1px solid var(--border-subtle);
  padding: 6px 8px;
  border-radius: 4px;
  height: 100%;
}

.meter-channel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.ch-label {
  font-size: 9px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.vu-track {
  width: 10px;
  height: 60px;
  background: #171b1e;
  border: 1px solid #232a30;
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

.vu-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 0%;
  background: linear-gradient(180deg, #ff3344 0%, #ff8c00 20%, #00e5a3 50%, #008762 100%);
  transition: height 0.04s ease-out;
}

.vu-peak {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: #fff;
  bottom: 0%;
  box-shadow: 0 0 4px #fff;
  transition: bottom 0.15s ease-out;
}

.meter-divider {
  width: 1px;
  height: 64px;
  background: #252d34;
  margin: 0 4px;
}

.scope-wrapper {
  flex: 1;
  position: relative;
  height: 100%;
  background: #080a0b;
  border: 1px solid #1a2228;
  border-radius: 4px;
  overflow: hidden;
}

#liveScopeCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.scope-overlay {
  position: absolute;
  top: 4px;
  left: 8px;
  right: 8px;
  display: flex;
  justify-content: space-between;
  pointer-events: none;
}

.scope-legend {
  font-size: 9px;
  font-family: var(--font-mono);
  color: rgba(0, 230, 163, 0.7);
  letter-spacing: 0.8px;
}

.scope-status {
  font-size: 9px;
  font-family: var(--font-mono);
  color: rgba(255, 122, 0, 0.7);
}

/* MIDI Log Stream */
.midi-log-stream {
  background: #090b0d;
  border: 1px solid #1a2026;
  border-radius: 4px;
  height: 90px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 10px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.log-entry {
  color: var(--text-secondary);
  line-height: 1.25;
  white-space: nowrap;
}

.log-entry.out { color: #00e5a3; }
.log-entry.in { color: #0ebafb; }
.log-entry.system { color: #7d8c92; font-style: italic; }

.midi-log-controls {
  display: flex;
  gap: 4px;
  align-items: center;
}

.filter-btn {
  background: #171b1f;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 9px;
  font-family: var(--font-mono);
  padding: 2px 6px;
  border-radius: 3px;
  cursor: pointer;
}

.filter-btn.active {
  background: #1f2824;
  border-color: var(--accent-teal);
  color: var(--accent-teal);
}

.mini-btn {
  background: #1b2025;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 9px;
  font-family: var(--font-mono);
  padding: 2px 6px;
  border-radius: 3px;
  cursor: pointer;
}

.mini-btn:hover {
  background: #232a31;
  color: #fff;
}

/* ADSR Curve Visualizer */
.env-curve-box {
  background: #0a0c0e;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  margin-bottom: 10px;
  overflow: hidden;
  height: 60px;
}

.env-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.preset-btn.action:hover {
  border-color: var(--accent-orange);
  box-shadow: 0 0 10px var(--accent-orange-glow);
}

.preset-btn.action.active {
  background: #4a2312;
  border-color: var(--accent-orange);
  color: #fff;
  box-shadow: 0 0 16px var(--accent-orange-glow);
  font-weight: 700;
}

.preset-btn.panic {
  margin-left: auto;
  background: #3a1518;
  border-color: #662024;
  color: #ff8888;
}

.preset-btn.panic:hover {
  background: #52191d;
  border-color: var(--accent-red);
  color: #fff;
  box-shadow: 0 0 10px var(--accent-red-glow);
}

/* ============================================================================
   3. Main Synth Workspace & Parameter Decks
   ============================================================================ */
.synth-workspace {
  flex: 1;
  padding: 16px 20px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  overflow-y: auto;
}

.panel-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 14px;
  box-shadow: var(--shadow-panel);
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color 0.2s ease;
}

.panel-card:hover {
  border-color: var(--border-prominent);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 8px;
}

.card-header h2 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #fff;
  text-transform: uppercase;
}

.card-header .badge {
  background: #13241e;
  color: var(--accent-teal);
  border: 1px solid #1a4233;
  font-size: 9px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 3px;
  font-family: var(--font-mono);
}

.card-header.highlight-orange h2 {
  color: #ff9d66;
}

.card-header .badge.orange {
  background: #2d180f;
  color: var(--accent-orange);
  border-color: #572914;
}

.controls-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* Slider Box */
.slider-box {
  background: #14171a;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
}

.slider-box.prominent {
  background: #171b1f;
  border-color: #313942;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.slider-header label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.val-display {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-teal);
  background: #0d1211;
  border: 1px solid #19362a;
  padding: 1px 6px;
  border-radius: 3px;
  min-width: 32px;
  text-align: right;
}

.val-display.big {
  font-size: 13px;
  color: var(--accent-orange);
  background: #170f0b;
  border-color: #3d1f11;
  padding: 2px 8px;
}

.cc-tag {
  position: absolute;
  right: 8px;
  bottom: 4px;
  font-size: 8px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  pointer-events: none;
}

/* HTML5 Range Sliders Styling */
input[type=range] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: #252b32;
  border-radius: 3px;
  outline: none;
  margin: 6px 0;
  cursor: pointer;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #e6ebed;
  border: 2px solid #15181b;
  box-shadow: 0 1px 4px rgba(0,0,0,0.8), 0 0 6px var(--accent-teal-glow);
  cursor: pointer;
  transition: transform 0.1s ease, background 0.15s ease;
}

input[type=range]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
  background: var(--accent-teal);
}

input[type=range].accent-orange::-webkit-slider-thumb {
  box-shadow: 0 1px 4px rgba(0,0,0,0.8), 0 0 8px var(--accent-orange-glow);
}

input[type=range].accent-orange::-webkit-slider-thumb:hover {
  background: var(--accent-orange);
}

input[type=range]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #e6ebed;
  border: 2px solid #15181b;
  cursor: pointer;
}

/* Control Groups (Segmented Buttons) */
.ctrl-group {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.ctrl-group label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
}

.ctrl-group label .cc {
  font-size: 9px;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.range-selector, .btn-trio, .btn-pair, .wave-selector {
  display: flex;
  background: #111417;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 2px;
  gap: 2px;
}

.opt-btn {
  flex: 1;
  background: transparent;
  color: var(--text-secondary);
  border: none;
  padding: 5px 4px;
  border-radius: 3px;
  font-size: 10px;
  font-weight: 600;
  font-family: var(--font-mono);
  cursor: pointer;
  text-align: center;
  transition: all 0.15s ease;
}

.opt-btn:hover {
  color: #fff;
  background: #252b31;
}

.opt-btn.active {
  background: #22352c;
  color: #fff;
  font-weight: 700;
  box-shadow: 0 0 6px var(--accent-teal-glow), inset 0 0 0 1px var(--accent-teal);
}

/* ============================================================================
   4. Bottom Piano Keyboard & Sequence Bar
   ============================================================================ */
.app-footer {
  background: linear-gradient(180deg, #181b1f 0%, #111316 100%);
  border-top: 2px solid var(--border-subtle);
  padding: 10px 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.5);
  z-index: 10;
}

.keyboard-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.kb-tools-left, .kb-tools-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.octave-controls {
  display: flex;
  align-items: center;
  background: #111416;
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 2px;
  gap: 4px;
}

.tool-btn {
  background: #232930;
  color: var(--text-primary);
  border: 1px solid var(--border-prominent);
  padding: 5px 10px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s ease;
}

.tool-btn:hover {
  background: #2c343d;
  color: #fff;
}

.tool-btn:active {
  transform: translateY(1px);
}

.tool-btn.toggle.active {
  background: #3a1518;
  border-color: var(--accent-red);
  color: #fff;
  box-shadow: 0 0 8px var(--accent-red-glow);
}

.latch-light {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #441114;
}

.tool-btn.toggle.active .latch-light {
  background: #ff3344;
  box-shadow: 0 0 8px #ff3344;
}

.tool-btn.seq.active {
  background: #143525;
  border-color: var(--accent-teal);
  color: #fff;
  box-shadow: 0 0 8px var(--accent-teal-glow);
}

.seq-light {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #113824;
}

.tool-btn.seq.active .seq-light {
  background: var(--accent-teal);
  box-shadow: 0 0 8px var(--accent-teal);
  animation: pulse-led 0.4s infinite alternate;
}

@keyframes pulse-led {
  0% { opacity: 0.4; }
  100% { opacity: 1; }
}

.oct-display {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 11px;
  color: var(--accent-teal);
  padding: 0 6px;
}

.active-note-indicator {
  font-family: var(--font-display);
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--text-muted);
  background: #0d0f11;
  border: 1px solid var(--border-subtle);
  padding: 4px 12px;
  border-radius: 4px;
}

.active-note-indicator .note-name {
  color: var(--accent-teal);
  font-weight: 800;
}

.mini-slider {
  max-width: 80px;
}

/* ============================================================================
   5. Realistic 25-Key Piano Keyboard
   ============================================================================ */
.piano-keyboard {
  position: relative;
  height: 140px;
  display: flex;
  background: #0a0b0d;
  border: 2px solid #23272d;
  border-radius: 6px;
  padding: 4px;
  box-shadow: inset 0 2px 8px rgba(0,0,0,0.8), 0 4px 12px rgba(0,0,0,0.6);
  user-select: none;
  overflow-x: auto;
}

.key-white {
  position: relative;
  flex: 1;
  height: 100%;
  background: linear-gradient(180deg, #f0f2f5 0%, #e2e6eb 85%, #cfd4dc 100%);
  border-radius: 0 0 4px 4px;
  border: 1px solid #9aa0a6;
  border-top: none;
  box-shadow: var(--shadow-key-white);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: 6px;
  transition: all 0.06s ease;
  z-index: 1;
}

.key-white .key-label {
  font-size: 9px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: #717b85;
  pointer-events: none;
}

.key-white:hover {
  background: #ffffff;
}

.key-white.active, .key-white:active {
  background: linear-gradient(180deg, #d8f5ec 0%, #b2ebd7 100%);
  border-color: var(--accent-teal-dark);
  box-shadow: inset 0 3px 5px rgba(0,0,0,0.3), 0 0 10px var(--accent-teal-glow);
  transform: translateY(2px);
}

.key-white.active .key-label {
  color: #005f42;
}

.key-black {
  position: absolute;
  width: 4.8%;
  height: 62%;
  background: linear-gradient(180deg, #33383f 0%, #17191d 85%, #0d0f11 100%);
  border-radius: 0 0 3px 3px;
  border: 1px solid #111;
  box-shadow: var(--shadow-key-black);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: 4px;
  z-index: 2;
  transition: all 0.06s ease;
}

.key-black .key-label {
  font-size: 8px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: #606872;
  pointer-events: none;
}

.key-black:hover {
  background: linear-gradient(180deg, #444b54 0%, #202428 100%);
}

.key-black.active, .key-black:active {
  background: linear-gradient(180deg, #7a3512 0%, #3d1504 100%);
  border-color: var(--accent-orange);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.6), 0 0 10px var(--accent-orange-glow);
  transform: translateY(2px);
}

.key-black.active .key-label {
  color: #ff9d66;
}

/* Full width and multi-column helper */
.ctrl-group.full-width {
  grid-column: 1 / -1;
}

/* 9. OSC Draw & Chop 16-Step Matrix Panel */
.step-matrix-panel {
  grid-column: 1 / -1;
  background: #14171a;
}

.step-matrix-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

@media (max-width: 1100px) {
  .step-matrix-content {
    grid-template-columns: 1fr;
  }
}

.matrix-block {
  background: #0d1012;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.matrix-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.matrix-header label {
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-teal);
  letter-spacing: 0.5px;
}

.matrix-actions {
  display: flex;
  gap: 4px;
}

.mini-tool-btn {
  background: #181d22;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 9px;
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 2px 6px;
  border-radius: 3px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.mini-tool-btn:hover {
  background: #252e36;
  border-color: var(--accent-teal);
  color: #fff;
}

/* 16-Step Draw Faders */
.draw-steps-grid {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 4px;
  height: 110px;
  background: #080a0c;
  border: 1px solid #1a2228;
  border-radius: 4px;
  padding: 8px 4px;
}

.draw-step-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.draw-step-fader-wrap {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.draw-step-slider {
  -webkit-appearance: none;
  appearance: none;
  writing-mode: vertical-lr;
  direction: rtl;
  width: 8px;
  height: 70px;
  background: #192026;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
}

.draw-step-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 6px;
  background: #00ffbc;
  border-radius: 2px;
  box-shadow: 0 0 6px rgba(0, 255, 188, 0.8);
  cursor: pointer;
}

.step-label {
  font-size: 8px;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* 16-Step Chop Comb Mask Buttons */
.chop-pads-grid {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 5px;
  background: #080a0c;
  border: 1px solid #1a2228;
  border-radius: 4px;
  padding: 10px 6px;
}

.chop-pad-btn {
  background: #171d22;
  border: 1px solid #252d36;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  height: 48px;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 4px 2px;
  transition: all 0.15s ease;
}

.chop-pad-btn .pad-led {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #252f36;
  transition: all 0.15s ease;
}

.chop-pad-btn:hover {
  background: #222b33;
}

.chop-pad-btn.active {
  background: #182e25;
  border-color: #00e5a3;
  color: #fff;
  box-shadow: 0 0 8px rgba(0, 229, 163, 0.4);
}

.chop-pad-btn.active .pad-led {
  background: #00ffbc;
  box-shadow: 0 0 6px #00ffbc;
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .app-header {
    flex-direction: column;
    align-items: stretch;
  }
  .target-controls {
    flex-wrap: wrap;
  }
}