:root {
  --bg-primary: #0b0d14;
  --bg-panel: rgba(20, 24, 34, 0.82);
  --bg-card: rgba(29, 34, 48, 0.75);
  --bg-input: rgba(14, 17, 24, 0.9);
  --border-color: rgba(255, 255, 255, 0.1);
  --border-glow: rgba(0, 229, 255, 0.3);
  --accent-cyan: #00f0ff;
  --accent-blue: #0088ff;
  --accent-magenta: #ff007f;
  --accent-purple: #9d4edd;
  --accent-green: #00ff88;
  --accent-orange: #ff9e00;
  --accent-gold: #ffd60a;
  --text-main: #f4f7fc;
  --text-muted: #9aa5b8;
  --font-mono: "Fira Code", "Cascadia Code", "JetBrains Mono", Consolas, monospace;
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --panel-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

/* Theme Variations */
[data-theme="sunset"] {
  --bg-primary: #12090e;
  --bg-panel: rgba(30, 16, 24, 0.84);
  --bg-card: rgba(45, 24, 36, 0.78);
  --accent-cyan: #ff7b00;
  --accent-blue: #ff0055;
  --border-glow: rgba(255, 123, 0, 0.4);
}

[data-theme="matrix"] {
  --bg-primary: #060e0a;
  --bg-panel: rgba(12, 26, 18, 0.84);
  --bg-card: rgba(18, 38, 26, 0.78);
  --accent-cyan: #00ff88;
  --accent-blue: #00d4aa;
  --border-glow: rgba(0, 255, 136, 0.4);
}

[data-theme="indigo"] {
  --bg-primary: #080b18;
  --bg-panel: rgba(16, 22, 44, 0.84);
  --bg-card: rgba(24, 32, 64, 0.78);
  --accent-cyan: #7000ff;
  --accent-blue: #00c3ff;
  --border-glow: rgba(112, 0, 255, 0.4);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 12% 18%, rgba(157, 78, 221, 0.28) 0%, transparent 42%),
    radial-gradient(circle at 88% 12%, rgba(0, 240, 255, 0.22) 0%, transparent 40%),
    radial-gradient(circle at 50% 85%, rgba(255, 0, 127, 0.18) 0%, transparent 50%),
    radial-gradient(circle at 25% 70%, rgba(0, 136, 255, 0.16) 0%, transparent 45%),
    linear-gradient(145deg, #07090e 0%, #0d111b 50%, #090c14 100%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-ui);
  line-height: 1.4;
  overflow-x: hidden;
  padding: 16px;
  min-height: 100vh;
}

.studio-container {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--bg-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  box-shadow: var(--panel-shadow);
  padding: 14px 20px;
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}

header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-magenta), var(--accent-cyan), var(--accent-green));
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand h1 {
  font-size: 1.3rem;
  letter-spacing: 0.5px;
  color: var(--text-main);
}

.brand .version-tag {
  background: #252b38;
  color: var(--accent-cyan);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-family: var(--font-mono);
}

.system-status {
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.status-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  padding: 4px 10px;
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #555;
}

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

.status-indicator.standby {
  background: var(--accent-orange);
}

.btn-primary {
  background: var(--accent-cyan);
  color: #0b1016;
  border: none;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary:hover {
  filter: brightness(1.15);
  box-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
}

.btn-danger {
  background: #3e1b1b;
  color: #ff6b6b;
  border: 1px solid #772b2b;
  font-size: 0.8rem;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
}

.btn-danger:hover {
  background: #602525;
}

/* Studio Main Grid */
.studio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 16px;
}

.panel {
  background: var(--bg-panel);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  box-shadow: var(--panel-shadow);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.panel:hover {
  border-color: var(--border-glow);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.55), 0 0 15px rgba(0, 240, 255, 0.08);
}

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

.panel-title {
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent-cyan);
}

.panel-controls {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* Control Elements */
.control-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

input[type="range"] {
  accent-color: var(--accent-cyan);
  background: var(--bg-input);
  height: 6px;
  border-radius: 3px;
  cursor: pointer;
}

select, input[type="text"], input[type="number"] {
  background: var(--bg-input);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 0.85rem;
  outline: none;
}

select:focus, input:focus {
  border-color: var(--accent-cyan);
}

.val-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

/* Envelope Grid */
.adsr-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  text-align: center;
}

.adsr-grid .control-group {
  align-items: center;
}

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

/* Visualizer Panel */
.visualizers {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
}

@media (max-width: 900px) {
  .visualizers {
    grid-template-columns: 1fr;
  }
}

canvas.scope {
  width: 100%;
  height: 140px;
  background: #0d0f12;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  display: block;
}

/* Hardware Keyboard View (49 Keys) */
.keyboard-section {
  grid-column: 1 / -1;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
}

.keyboard-scroll {
  display: flex;
  justify-content: center;
  min-width: 800px;
  padding: 10px 0;
}

.keystation-keyboard {
  display: flex;
  position: relative;
  user-select: none;
}

.key {
  position: relative;
  cursor: pointer;
  border-radius: 0 0 4px 4px;
  transition: background-color 0.05s, transform 0.05s;
}

.key.white {
  width: 24px;
  height: 120px;
  background: #eaeef4;
  border: 1px solid #111;
  border-right: none;
  z-index: 1;
}

.key.white:last-child {
  border-right: 1px solid #111;
}

.key.white.active {
  background: var(--accent-cyan) !important;
  box-shadow: 0 0 12px var(--accent-cyan);
  transform: translateY(2px);
}

.key.black {
  width: 16px;
  height: 75px;
  background: #1e222a;
  border: 1px solid #000;
  margin-left: -8px;
  margin-right: -8px;
  z-index: 2;
}

.key.black.active {
  background: #ff0077 !important;
  box-shadow: 0 0 12px #ff0077;
  transform: translateY(2px);
}

.key-label {
  position: absolute;
  bottom: 6px;
  left: 0;
  right: 0;
  text-align: center;
  font-size: 0.65rem;
  color: #6b778d;
  font-family: var(--font-mono);
  pointer-events: none;
}

/* MIDI Activity Telemetry Console */
.telemetry-console {
  background: #090a0d;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 10px;
  height: 140px;
  overflow-y: auto;
  color: #7ce38b;
  display: flex;
  flex-direction: column;
}

.telemetry-entry {
  line-height: 1.3;
}

.telemetry-entry.note-on { color: var(--accent-green); }
.telemetry-entry.note-off { color: var(--text-muted); }
.telemetry-entry.cc { color: var(--accent-orange); }
.telemetry-entry.pitch { color: var(--accent-cyan); }

/* Controllers bar (Wheels & Sliders) */
.wheels-cluster {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 8px 12px;
  background: var(--bg-card);
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

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

.wheel-bar-container {
  width: 14px;
  height: 70px;
  background: var(--bg-input);
  border-radius: 3px;
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.wheel-fill {
  position: absolute;
  bottom: 0;
  width: 100%;
  background: var(--accent-cyan);
  transition: height 0.05s linear;
}

.wheel-fill.pitch {
  background: var(--accent-orange);
  bottom: 50%;
  transform-origin: bottom;
}