/* Root variables for styling system */
:root {
  --font-family-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-family-display: 'Outfit', sans-serif;

  /* Theme colors - Dark Slate theme by default */
  --bg-primary: #070913;
  --bg-secondary: #0e1224;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #00A2FF;
  
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;

  /* Accent Gradients for Sound Pads */
  --grad-airhorn: linear-gradient(135deg, #ff416c, #ff4b2b);
  --grad-fart: linear-gradient(135deg, #f1a93b, #7a431d);
  --grad-laughter: linear-gradient(135deg, #b06ab3, #4568dc);
  --grad-applause: linear-gradient(135deg, #11998e, #38ef7d);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  
  --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);
}

/* Global Reset & Base Styling */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  overflow-x: hidden;
  position: relative;
  line-height: 1.5;
}

/* Background Ambient Glows */
.ambient-glow {
  position: fixed;
  width: 50vw;
  height: 50vw;
  max-width: 600px;
  max-height: 600px;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.18;
  z-index: -1;
  pointer-events: none;
}

.glow-1 {
  background: radial-gradient(circle, #4568dc 0%, transparent 70%);
  top: -10%;
  left: -10%;
  animation: float-slow 20s infinite alternate ease-in-out;
}

.glow-2 {
  background: radial-gradient(circle, #38ef7d 0%, transparent 70%);
  bottom: -10%;
  right: -10%;
  animation: float-slow 25s infinite alternate-reverse ease-in-out;
}

@keyframes float-slow {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.1); }
}

/* Core Container */
.app-container {
  width: 100%;
  max-width: 900px;
  padding: 2.5rem 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Glassmorphism Panel style */
.glass-panel {
  background: rgba(14, 18, 36, 0.45);
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.glass-panel:hover {
  border-color: rgba(255, 255, 255, 0.12);
}

/* Header */
.app-header {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.header-main {
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 0.25rem;
}

.brand-logo {
  color: #00A2FF;
  display: flex;
  align-items: center;
  animation: pulse-glow 3s infinite alternate;
}

h1 {
  font-family: var(--font-family-display);
  font-weight: 800;
  font-size: 2.5rem;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, #ffffff 30%, #a5b4fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tagline {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}

/* Controls Dashboard */
.controls-dashboard {
  padding: 1.25rem 1.75rem;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  align-items: center;
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .controls-dashboard {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
}

/* Search Box */
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
  pointer-events: none;
}

#sound-search {
  width: 100%;
  background: rgba(7, 9, 19, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.75rem 1rem 0.75rem 2.5rem;
  color: var(--text-primary);
  font-family: var(--font-family-sans);
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition-fast);
}

#sound-search:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 10px rgba(0, 162, 255, 0.15);
}

/* Control Groups inside Dashboard */
.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

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

/* Switch styling for Toggle Source Mode */
.toggle-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: 2.25rem;
}

.toggle-option {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.toggle-option.active {
  color: var(--text-primary);
  font-weight: 600;
}

.switch {
  position: relative;
  width: 50px;
  height: 26px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-color);
  border-radius: 100px;
  cursor: pointer;
  outline: none;
  transition: var(--transition-fast);
}

.switch:focus-visible {
  border-color: var(--border-focus);
  box-shadow: 0 0 8px var(--border-focus);
}

.switch-handle {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--text-primary);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.switch[aria-checked="true"] .switch-handle {
  transform: translateX(24px);
  background: #00A2FF;
}

/* Volume Slider in Dashboard */
.volume-slider-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
}

.volume-slider-wrapper input[type="range"] {
  flex: 1;
  height: 6px;
  border-radius: 100px;
  appearance: none;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.volume-slider-wrapper input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #00A2FF;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast);
}

.volume-slider-wrapper input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.volume-badge {
  font-size: 0.8rem;
  font-weight: 600;
  width: 2.5rem;
  text-align: right;
  color: var(--text-primary);
}

/* Visualizer Section */
.visualizer-section {
  padding: 1.25rem 1.5rem;
}

.visualizer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.visualizer-header h2 {
  font-family: var(--font-family-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.visualizer-modes {
  display: flex;
  background: rgba(0, 0, 0, 0.25);
  border-radius: 8px;
  padding: 2px;
}

.viz-btn {
  background: none;
  border: none;
  font-family: var(--font-family-sans);
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.viz-btn.active {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}

.canvas-container {
  height: 80px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 12px;
  overflow: hidden;
  position: relative;
}

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

/* Sound Board Grid */
.soundboard-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

@media (max-width: 520px) {
  .soundboard-grid {
    grid-template-columns: 1fr;
  }
}

/* Sound Card Item */
.sound-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
  min-height: 170px;
  overflow: hidden;
}

/* Custom Gradients/Effects for Sound Types */
.pad-airhorn { --glow-color: #ff4b2b; }
.pad-fart { --glow-color: #f1a93b; }
.pad-laughter { --glow-color: #4568dc; }
.pad-applause { --glow-color: #38ef7d; }

.sound-card .card-glow {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 50%);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.sound-card:hover .card-glow {
  opacity: 1;
}

.sound-card.playing {
  border-color: var(--glow-color);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.03), 0 0 25px rgba(255, 255, 255, 0.03);
}

/* Card Header */
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 2;
}

.hotkey-badge {
  font-family: var(--font-family-sans);
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.04);
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  color: var(--text-secondary);
}

.loop-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  transition: var(--transition-fast);
}

.loop-toggle:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.loop-toggle[aria-pressed="true"] {
  color: #38ef7d;
  background: rgba(56, 239, 125, 0.1);
  transform: rotate(180deg);
}

/* Play Trigger Button (Main Click Area) */
.pad-trigger {
  background: none;
  border: none;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  margin: 0.5rem 0;
  cursor: pointer;
  z-index: 2;
  outline: none;
  transition: transform var(--transition-fast);
}

.pad-trigger:active {
  transform: scale(0.96);
}

.sound-card.keyboard-active {
  transform: scale(0.97);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}


.emoji {
  font-size: 2.2rem;
  transition: transform var(--transition-fast);
}

.sound-title {
  font-family: var(--font-family-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: #ffffff;
  transition: color var(--transition-fast);
}

.sound-card:hover .emoji {
  transform: translateY(-2px) scale(1.06);
}

/* Custom Card Gradients Hover effects */
.pad-airhorn:hover { border-color: rgba(255, 75, 43, 0.4); }
.pad-fart:hover { border-color: rgba(241, 169, 59, 0.4); }
.pad-laughter:hover { border-color: rgba(69, 104, 220, 0.4); }
.pad-applause:hover { border-color: rgba(56, 239, 125, 0.4); }

/* Play state customizations */
.pad-airhorn.playing { background: rgba(255, 75, 43, 0.04); border-color: #ff4b2b; }
.pad-fart.playing { background: rgba(241, 169, 59, 0.04); border-color: #f1a93b; }
.pad-laughter.playing { background: rgba(69, 104, 220, 0.04); border-color: #4568dc; }
.pad-applause.playing { background: rgba(56, 239, 125, 0.04); border-color: #38ef7d; }

/* Keyboard Focus Indicators */
:where(.loop-toggle, .switch, .pad-trigger, .stop-btn, .card-volume):focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 4px;
}

/* Card Controls Block */
.card-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 2;
  margin-top: auto;
}

.card-volume {
  flex: 1;
  height: 4px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  appearance: none;
  -webkit-appearance: none;
  outline: none;
  cursor: pointer;
}

.card-volume::-webkit-slider-thumb {
  appearance: none;
  -webkit-appearance: none;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-secondary);
  cursor: pointer;
  transition: transform var(--transition-fast), background var(--transition-fast);
}

.sound-card:hover .card-volume::-webkit-slider-thumb {
  background: #ffffff;
  transform: scale(1.2);
}

.stop-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
  width: 24px;
  height: 24px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.stop-btn:not(:disabled):hover {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border-color: rgba(239, 68, 68, 0.2);
}

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

/* App Footer / Keyboard shortcuts list */
.app-footer {
  padding: 1.25rem 1.75rem;
}

.app-footer h3 {
  font-family: var(--font-family-display);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.shortcuts-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
}

.shortcuts-list div {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.key-cap {
  font-family: var(--font-family-sans);
  background: rgba(7, 9, 19, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom-width: 3px;
  border-radius: 6px;
  padding: 0.2rem 0.5rem;
  font-weight: 700;
  font-size: 0.75rem;
  color: #ffffff;
  display: inline-block;
  box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

/* Visually Hidden Utility for Screenreaders */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Pulsing visual cues when playing */
@keyframes pulse-glow {
  0% { transform: scale(1); filter: drop-shadow(0 0 2px rgba(0, 162, 255, 0.2)); }
  100% { transform: scale(1.05); filter: drop-shadow(0 0 8px rgba(0, 162, 255, 0.6)); }
}