/* ==========================================================================
   CYMATICS VISUALIZER - FUTURISTIC CYBERPUNK DESIGN SYSTEM
   ========================================================================== */

:root {
  /* Colors */
  --bg-primary: #05060a;
  --bg-secondary: #0a0c14;
  --glass-bg: rgba(8, 12, 28, 0.55);
  --glass-border: rgba(0, 242, 254, 0.15);
  --glass-highlight: rgba(255, 255, 255, 0.02);
  
  --text-main: #e2e8f0;
  --text-muted: #64748b;
  --text-cyan: #00f2fe;
  
  /* Theme Accents (glowing neon vibes) */
  --accent-cyan: #00f2fe;
  --accent-cyan-glow: rgba(0, 242, 254, 0.4);
  --accent-magenta: #ff007f;
  --accent-magenta-glow: rgba(255, 0, 127, 0.35);
  --accent-gold: #ffaa00;
  --accent-gold-glow: rgba(255, 170, 0, 0.35);
  --accent-emerald: #00ff88;
  --accent-emerald-glow: rgba(0, 255, 136, 0.35);
  
  /* Note Octave Colors */
  --color-low: #00f2fe;
  --color-mid: #b927fc;
  --color-high: #ffaa00;
  
  /* Selected theme defaults */
  --theme-color: var(--accent-cyan);
  --theme-glow: var(--accent-cyan-glow);
  
  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Typography */
  --font-sans: 'Outfit', sans-serif;
  --font-mono: 'Share Tech Mono', monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  min-height: 100vh;
  overflow: hidden;
  position: relative;
}

/* Background grid network effect */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    linear-gradient(rgba(18, 24, 45, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18, 24, 45, 0.1) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: -2;
  pointer-events: none;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}
::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.3);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--theme-color);
}

/* Ambient Background Glows */
.ambient-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(160px);
  z-index: -1;
  pointer-events: none;
  opacity: 0.25;
  transition: background-color var(--transition-slow);
}

.bg-glow-1 {
  width: 60vw;
  height: 60vw;
  top: -15vw;
  right: -10vw;
  background-color: rgba(0, 242, 254, 0.18);
}

.bg-glow-2 {
  width: 50vw;
  height: 50vw;
  bottom: -15vw;
  left: -10vw;
  background-color: rgba(255, 0, 127, 0.1);
}

/* Glassmorphism panel styling */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  box-shadow: 0 10px 40px 0 rgba(0, 0, 0, 0.5);
}

/* App Container Layout */
.app-container {
  display: flex;
  width: 100vw;
  height: 100vh;
  padding: 20px;
  gap: 20px;
  overflow: hidden;
  position: relative;
}

/* ==========================================================================
   SIDEBAR & CONTROLS
   ========================================================================== */

.sidebar {
  width: 390px;
  min-width: 390px;
  border-radius: 16px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow-y: auto;
  z-index: 10;
  transition: border-color var(--transition-normal);
}

.logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  margin-bottom: 4px;
}

.logo .wave-icon {
  font-size: 2.4rem;
  color: var(--theme-color);
  text-shadow: 0 0 20px var(--theme-glow);
  margin-bottom: 8px;
  animation: float 4s ease-in-out infinite;
  transition: color var(--transition-normal), text-shadow var(--transition-normal);
}

@keyframes float {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-6px) rotate(5deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

.logo h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 4px;
  background: linear-gradient(135deg, #ffffff, var(--theme-color));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.logo .subtitle {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 5px;
  color: var(--text-muted);
  font-weight: 700;
  margin-top: 4px;
  position: relative;
}

.logo .subtitle::before, .logo .subtitle::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 15px;
  height: 1px;
  background: var(--glass-border);
}
.logo .subtitle::before { left: -22px; }
.logo .subtitle::after { right: -22px; }

/* Control Tabs */
.control-tabs {
  display: flex;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 8px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 11px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
  color: #000000;
  background: var(--theme-color);
  box-shadow: 0 0 12px var(--theme-glow);
  font-weight: 700;
}

/* Control Panels */
.panel {
  display: none;
  flex-direction: column;
  gap: 16px;
}

.panel.active {
  display: flex;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-group label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-muted);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Inputs & Units */
.input-with-unit {
  position: relative;
  display: flex;
  align-items: center;
}

.input-with-unit input[type="number"] {
  width: 100%;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 11px 45px 11px 14px;
  border-radius: 8px;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  outline: none;
  transition: all var(--transition-fast);
}

.input-with-unit input[type="number"]:focus {
  border-color: var(--theme-color);
  box-shadow: 0 0 8px var(--theme-glow);
  background: rgba(0, 0, 0, 0.5);
}

.input-with-unit .unit {
  position: absolute;
  right: 14px;
  color: var(--theme-color);
  font-weight: 600;
  font-size: 0.85rem;
  pointer-events: none;
}

/* Sliders */
.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--theme-color);
  box-shadow: 0 0 8px var(--theme-glow);
  cursor: pointer;
  border: 1px solid #fff;
  transition: transform var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.3);
}

/* Keyboard selectors row style */
.keyboard-controls-row {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
  justify-content: space-between;
}

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

.kb-sub-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.select-menu.mini-select {
  padding: 6px 8px;
  font-size: 0.75rem;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.08);
  width: 100%;
}

/* Key out-of-scale visual lock style */
.key.out-of-scale {
  opacity: 0.12 !important;
  pointer-events: none !important;
  box-shadow: none !important;
  transform: none !important;
}

/* CHROMATIC PIANO KEYBOARD */
.piano-keyboard {
  position: relative;
  display: flex;
  height: 120px;
  background: rgba(0, 0, 0, 0.4);
  padding: 8px 6px 4px 6px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  margin-top: 4px;
  overflow-x: auto;
  overflow-y: hidden;
  justify-content: flex-start;
}

.key {
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0 0 5px 5px;
  cursor: pointer;
  font-family: var(--font-mono);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 8px;
  box-shadow: 0 3px 6px rgba(0,0,0,0.5);
  transition: all var(--transition-fast);
  outline: none;
}

.key.white {
  height: 102px;
  width: 25px;
  min-width: 25px;
  background: rgba(255, 255, 255, 0.12);
  color: var(--text-muted);
  font-size: 0.6rem;
  z-index: 1;
}

.key.black {
  height: 62px;
  width: 15px;
  min-width: 15px;
  background: #090a12;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.45rem;
  z-index: 2;
  margin-left: -7.5px;
  margin-right: -7.5px;
  border-color: rgba(255, 255, 255, 0.18);
  padding-bottom: 4px;
}

.key.white:hover {
  background: rgba(255, 255, 255, 0.22);
  border-color: var(--theme-color);
  color: #fff;
}

.key.black:hover {
  background: #141727;
  border-color: var(--theme-color);
  color: #fff;
}

/* Active State for key press */
.key.active-pad {
  transform: translateY(2px);
  color: #000 !important;
  font-weight: 700;
  border-color: var(--theme-color);
  background: var(--theme-color) !important;
  box-shadow: 0 0 16px var(--theme-glow);
}

/* Switches and Mode adjustments */
.mode-link-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.toggle-container {
  display: flex;
  align-items: center;
  gap: 8px;
}

.toggle-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

.switch {
  position: relative;
  display: inline-block;
  width: 36px;
  height: 18px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.08);
  transition: .25s;
  border-radius: 9px;
}

.switch-slider:before {
  position: absolute;
  content: "";
  height: 12px;
  width: 12px;
  left: 3px;
  bottom: 3px;
  background-color: var(--text-muted);
  transition: .25s;
  border-radius: 50%;
}

.switch input:checked + .switch-slider {
  background-color: rgba(0, 242, 254, 0.25);
}

.switch input:checked + .switch-slider:before {
  transform: translateX(18px);
  background-color: var(--theme-color);
  box-shadow: 0 0 6px var(--theme-glow);
}

.mode-sliders {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: rgba(0, 0, 0, 0.2);
  padding: 12px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.02);
}

.mode-slider-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mode-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  width: 55px;
  color: var(--text-muted);
}

.mini-slider {
  flex-grow: 1;
}

.mode-val {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  width: 20px;
  text-align: right;
  color: var(--theme-color);
  font-weight: bold;
}

/* Volume Wave Row */
.vol-wave-row {
  display: flex;
  gap: 12px;
  align-items: center;
}

.vol-control {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.2);
  padding: 8px 12px;
  border-radius: 8px;
  flex-grow: 1;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.vol-control i {
  color: var(--text-muted);
  font-size: 0.8rem;
}

.vol-control .slider {
  width: 90px;
}

.select-menu {
  background: rgba(8, 12, 28, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  padding: 9px 12px;
  border-radius: 8px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
  transition: border var(--transition-fast);
}

.select-menu:focus {
  border-color: var(--theme-color);
}

/* Buttons */
.btn {
  width: 100%;
  border: none;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 12px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.primary-btn {
  background: var(--theme-color);
  color: #000;
  box-shadow: 0 4px 15px var(--theme-glow);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--theme-glow);
  filter: brightness(1.1);
}

.pulse-glow.playing {
  animation: pulse-glow-ani 2s infinite;
  color: #fff;
}

@keyframes pulse-glow-ani {
  0% { box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(0, 242, 254, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 242, 254, 0); }
}

/* Microphone status */
.mic-status-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(0, 0, 0, 0.25);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.mic-icon-container {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mic-icon-container i {
  font-size: 1.2rem;
  color: var(--text-muted);
}

.mic-icon-container.recording {
  background: rgba(255, 0, 85, 0.12);
  border: 1px solid rgba(255, 0, 85, 0.25);
  box-shadow: 0 0 12px rgba(255, 0, 85, 0.2);
  animation: pulse-recording 1.6s infinite;
}

.mic-icon-container.recording i {
  color: #ff0055;
}

@keyframes pulse-recording {
  0% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.06); opacity: 1; }
  100% { transform: scale(1); opacity: 0.9; }
}

.mic-status-text h4 {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.mic-status-text p {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.mic-btn {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-main);
}

.mic-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}

.mic-btn.active {
  background: #ff0055;
  color: white;
  border-color: #ff0055;
  box-shadow: 0 4px 15px rgba(255, 0, 85, 0.35);
}

.mini-spectrum-container {
  width: 100%;
  height: 52px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.04);
  overflow: hidden;
}

#canvas-mini-spectrum {
  width: 100%;
  height: 100%;
  display: block;
}

.plate-type-row {
  display: flex;
  gap: 10px;
}

.plate-btn {
  flex: 1;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 10px;
  font-family: var(--font-sans);
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.plate-btn:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.05);
}

.plate-btn.active {
  color: var(--theme-color);
  border-color: var(--theme-color);
  background: rgba(0, 242, 254, 0.04);
}

.section-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.06);
  margin: 4px 0;
}

.label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.label-row span {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--theme-color);
  font-weight: bold;
}


/* ==========================================================================
   MAIN VIEWPORT & BORDERLESS CANVAS PLATE
   ========================================================================== */

.main-viewport {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
  overflow: hidden;
  height: 100%;
}

/* 
   Optimized clean canvas board:
   Zero boundaries or references inside. Just dark glass backdrop 
*/
.canvas-wrapper {
  flex-grow: 1;
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.03);
  box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.95);
  transition: border-color var(--transition-normal);
}

/* Subtle glow on high vibrations */
.canvas-wrapper.vibrating {
  border-color: rgba(0, 242, 254, 0.08);
}

#canvas-cymatics {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

/* HUD elements styled with digital cock-pit / cyberpunk lines */
.hud-overlay {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 14px;
  background: rgba(4, 5, 10, 0.75);
  backdrop-filter: blur(8px);
  border-radius: 6px;
  border-left: 2px solid var(--theme-color);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  border-right: 1px solid rgba(255, 255, 255, 0.04);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  pointer-events: none;
  z-index: 5;
  box-shadow: 0 4px 16px rgba(0,0,0,0.6);
  opacity: 1;
  transform: scale(1);
  transition: all var(--transition-normal);
}

/* Scanline visual overlay inside HUD cards */
.hud-overlay::before {
  content: "";
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.2) 50%), linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
  background-size: 100% 3px, 3px 100%;
  pointer-events: none;
  border-radius: inherit;
}

/* HUD Overlay Hidden Class */
.hud-overlay.hidden {
  opacity: 0;
  transform: scale(0.95);
  pointer-events: none;
}

#hud-top-left { top: 20px; left: 20px; }
#hud-top-right { top: 20px; right: 20px; }
#hud-bottom-left { bottom: 20px; left: 20px; }
#hud-bottom-right { bottom: 20px; right: 20px; }

.hud-item {
  display: flex;
  gap: 8px;
  align-items: center;
}

.hud-label {
  color: var(--text-muted);
}

.hud-val {
  color: var(--theme-color);
  font-weight: bold;
}

.hud-unit {
  font-size: 0.6rem;
  color: var(--text-muted);
}

/* Special HUD state colors */
.hud-val.status-idle { color: var(--text-muted); }
.hud-val.status-vibrating {
  color: var(--accent-emerald);
  text-shadow: 0 0 5px rgba(0, 255, 136, 0.4);
}
.hud-val.status-mic {
  color: #ff0055;
  text-shadow: 0 0 5px rgba(255, 0, 85, 0.4);
}

/* HUD Eye Toggle Button */
.hud-toggle-btn {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(4, 5, 10, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 6;
  outline: none;
  box-shadow: 0 4px 10px rgba(0,0,0,0.5);
  transition: all var(--transition-fast);
}

.hud-toggle-btn:hover {
  color: var(--theme-color);
  border-color: var(--theme-color);
  box-shadow: 0 0 8px var(--theme-glow);
}

.hud-toggle-btn.hud-hidden {
  color: #ff0055;
  border-color: rgba(255, 0, 85, 0.3);
}

/* Hover prompt on canvas */
.canvas-prompt {
  position: absolute;
  bottom: 85px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  pointer-events: none;
  opacity: 0;
  transform: translateY(8px);
  transition: all var(--transition-normal);
  z-index: 4;
}

.canvas-wrapper:hover .canvas-prompt {
  opacity: 0.65;
  transform: translateY(0);
}

.prompt-content {
  background: rgba(0, 0, 0, 0.85);
  border: 1px solid rgba(255, 255, 255, 0.05);
  padding: 8px 16px;
  border-radius: 30px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.prompt-content i {
  color: var(--theme-color);
}

/* ==========================================================================
   FOOTER DECK (PRESETS & INFO)
   ========================================================================== */

.footer-deck {
  display: grid;
  grid-template-columns: 1.8fr 1.2fr;
  gap: 20px;
  max-height: 200px;
  min-height: 200px;
}

.presets-section {
  border-radius: 16px;
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
}

.presets-section h3 {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.presets-section h3 i {
  color: var(--theme-color);
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  overflow-y: auto;
  flex-grow: 1;
  padding-right: 4px;
}

.preset-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 3px;
  transition: all var(--transition-fast);
}

.preset-btn:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--theme-color);
  transform: translateY(-1px);
}

.preset-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: #ffffff;
}

.preset-modes {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
}

.preset-btn:hover .preset-modes {
  color: var(--theme-color);
}

/* Info Section */
.info-section {
  border-radius: 16px;
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.info-toggle-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.info-toggle-header h3 {
  font-size: 0.95rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.info-toggle-header h3 i {
  color: var(--theme-color);
}

.info-arrow {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: transform var(--transition-normal);
}

.info-arrow.collapsed {
  transform: rotate(-180deg);
}

.info-content {
  margin-top: 10px;
  overflow-y: auto;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
  padding-right: 4px;
}

/* ==========================================================================
   DYNAMIC COLOR THEMES
   ========================================================================== */

body.theme-cyan {
  --theme-color: var(--accent-cyan);
  --theme-glow: var(--accent-cyan-glow);
}

body.theme-crimson {
  --theme-color: var(--accent-magenta);
  --theme-glow: var(--accent-magenta-glow);
  --glass-border: rgba(255, 0, 127, 0.15);
  
  .bg-glow-1 { background-color: rgba(255, 0, 127, 0.16); }
  .bg-glow-2 { background-color: rgba(0, 242, 254, 0.04); }
}

body.theme-gold {
  --theme-color: var(--accent-gold);
  --theme-glow: var(--accent-gold-glow);
  --glass-border: rgba(255, 170, 0, 0.15);
  
  .bg-glow-1 { background-color: rgba(255, 170, 0, 0.13); }
  .bg-glow-2 { background-color: rgba(255, 0, 127, 0.03); }
}

body.theme-emerald {
  --theme-color: var(--accent-emerald);
  --theme-glow: var(--accent-emerald-glow);
  --glass-border: rgba(0, 255, 136, 0.15);
  
  .bg-glow-1 { background-color: rgba(0, 255, 136, 0.14); }
  .bg-glow-2 { background-color: rgba(0, 242, 254, 0.04); }
}

body.theme-rainbow {
  --theme-color: #ff33aa;
  --theme-glow: rgba(255, 50, 170, 0.35);
  --glass-border: rgba(255, 50, 170, 0.15);
  
  .bg-glow-1 { background-color: rgba(255, 0, 127, 0.06); }
  .bg-glow-2 { background-color: rgba(0, 255, 136, 0.06); }
}

/* ==========================================================================
   RESPONSIVE DESIGN — MOBILE & TABLET
   ========================================================================== */

/* ---- Tablet breakpoint (≤ 1024px) ---- */
@media (max-width: 1024px) {
  body {
    overflow-y: auto;
    overflow-x: hidden;
  }

  .app-container {
    flex-direction: column;
    overflow: visible;
    height: auto;
    min-height: 100vh;
    padding: 12px;
    gap: 12px;
  }

  .sidebar {
    width: 100%;
    min-width: 100%;
    height: auto;
    max-height: none;
    overflow-y: visible;
    padding: 16px;
    gap: 14px;
    border-radius: 12px;
  }

  .main-viewport {
    height: auto;
    min-height: 50vh;
    flex-grow: 0;
    overflow: visible;
  }

  .canvas-wrapper {
    min-height: 50vh;
    height: 55vh;
    border-radius: 12px;
  }

  .footer-deck {
    grid-template-columns: 1fr;
    max-height: none;
    min-height: auto;
    gap: 12px;
  }

  .presets-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Ambient glows are distracting on small screens */
  .ambient-glow {
    opacity: 0.1;
  }
}

/* ---- Mobile breakpoint (≤ 768px) ---- */
@media (max-width: 768px) {
  .app-container {
    padding: 8px;
    gap: 10px;
  }

  .sidebar {
    padding: 14px;
    gap: 12px;
    border-radius: 10px;
  }

  .logo h1 {
    font-size: 1.4rem;
    letter-spacing: 3px;
  }

  .logo .wave-icon {
    font-size: 1.8rem;
  }

  .logo .subtitle {
    font-size: 0.6rem;
    letter-spacing: 3px;
  }

  .canvas-wrapper {
    min-height: 45vh;
    height: 50vh;
  }

  /* Stack keyboard controls into a 2x2 grid */
  .keyboard-controls-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }

  .piano-keyboard {
    height: 90px;
    padding: 6px 4px 3px 4px;
  }

  .key.white {
    height: 78px;
    width: 22px;
    min-width: 22px;
    font-size: 0.5rem;
  }

  .key.black {
    height: 48px;
    width: 13px;
    min-width: 13px;
    font-size: 0.4rem;
    margin-left: -6.5px;
    margin-right: -6.5px;
  }

  /* HUD overlays: make smaller */
  .hud-overlay {
    padding: 6px 10px;
    font-size: 0.6rem;
    gap: 2px;
  }

  #hud-top-left { top: 8px; left: 8px; }
  #hud-top-right { top: 8px; right: 8px; }
  #hud-bottom-left { bottom: 8px; left: 8px; }
  #hud-bottom-right { bottom: 8px; right: 8px; }

  .hud-toggle-btn {
    top: 8px;
    width: 28px;
    height: 28px;
    font-size: 0.7rem;
  }

  .presets-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
  }

  .preset-btn {
    padding: 8px 10px;
  }

  .preset-name {
    font-size: 0.78rem;
  }

  .preset-modes {
    font-size: 0.6rem;
  }

  .footer-deck {
    grid-template-columns: 1fr;
  }

  /* Mic controls */
  .mic-status-card {
    padding: 12px;
    gap: 12px;
  }

  .mic-icon-container {
    width: 36px;
    height: 36px;
  }

  .btn {
    padding: 10px;
    font-size: 0.85rem;
  }

  .vol-wave-row {
    flex-direction: column;
    gap: 8px;
  }

  .vol-control .slider {
    width: 100%;
  }

  .select-menu {
    font-size: 0.8rem;
    padding: 8px 10px;
  }

  .input-with-unit input[type="number"] {
    font-size: 0.95rem;
    padding: 9px 40px 9px 12px;
  }
}

/* ---- Small phones (≤ 480px) ---- */
@media (max-width: 480px) {
  .app-container {
    padding: 6px;
    gap: 8px;
  }

  .sidebar {
    padding: 12px;
    gap: 10px;
  }

  .logo h1 {
    font-size: 1.2rem;
    letter-spacing: 2px;
  }

  .logo .wave-icon {
    font-size: 1.5rem;
    margin-bottom: 4px;
  }

  .logo .subtitle {
    font-size: 0.55rem;
    letter-spacing: 2px;
  }

  .logo .subtitle::before,
  .logo .subtitle::after {
    display: none;
  }

  .canvas-wrapper {
    min-height: 40vh;
    height: 45vh;
  }

  .control-group label {
    font-size: 0.65rem;
  }

  .tab-btn {
    padding: 9px;
    font-size: 0.75rem;
    gap: 5px;
  }

  .piano-keyboard {
    height: 75px;
    padding: 4px 3px 2px 3px;
  }

  .key.white {
    height: 65px;
    width: 18px;
    min-width: 18px;
    font-size: 0.42rem;
    padding-bottom: 4px;
  }

  .key.black {
    height: 40px;
    width: 11px;
    min-width: 11px;
    font-size: 0.35rem;
    margin-left: -5.5px;
    margin-right: -5.5px;
  }

  /* Hide non-essential HUD items on very small screens */
  #hud-bottom-left,
  #hud-bottom-right {
    display: none;
  }

  .presets-grid {
    grid-template-columns: 1fr 1fr;
    gap: 5px;
  }

  .presets-section {
    padding: 12px 14px;
  }

  .info-section {
    padding: 12px 14px;
  }

  .mode-sliders {
    padding: 8px;
  }
}