/* ============================================================
   Sound Effects Board — Neon DJ/Streaming Theme
   ============================================================ */

:root {
  --primary: #FF006E;
  --secondary: #8338EC;
  --accent: #FFBE0B;
  --bg: #0A0A1A;
  --bg-card: #111128;
  --bg-card-hover: #1A1A3A;
  --bg-surface: #0E0E24;
  --border: rgba(255, 0, 110, 0.15);
  --border-hover: rgba(255, 0, 110, 0.4);
  --text: #F0E6FF;
  --text-dim: #8B7FA8;
  --text-muted: #5A4F72;
  --glow-pink: 0 0 20px rgba(255, 0, 110, 0.3);
  --glow-purple: 0 0 20px rgba(131, 56, 236, 0.3);
  --glow-yellow: 0 0 20px rgba(255, 190, 11, 0.3);
  --radius: 8px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --pad-colors: #FF006E, #8338EC, #FFBE0B, #3A86FF, #06D6A0, #FF5E5B, #D00000, #E85D04, #48BFE3, #56CFE1;
}

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

html { font-size: 16px; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background ambient glow */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 40%, rgba(131, 56, 236, 0.06) 0%, transparent 50%),
              radial-gradient(circle at 70% 60%, rgba(255, 0, 110, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

.app { position: relative; z-index: 1; display: flex; flex-direction: column; min-height: 100vh; }

/* --- Header --- */
.header {
  background: rgba(14, 14, 36, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { font-size: 1.6rem; }
.logo-text {
  font-size: 1.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.master-volume {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
}

.volume-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 80px;
  height: 4px;
  background: var(--bg-card);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}

.volume-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: var(--glow-pink);
}

.volume-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  cursor: pointer;
}

.volume-label { font-size: 0.75rem; color: var(--text-muted); min-width: 30px; }

.btn-small {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-small:hover { border-color: var(--border-hover); background: var(--bg-card-hover); transform: translateY(-1px); }
.btn-small:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-upload { border-color: rgba(131, 56, 236, 0.3); }
.btn-upload:hover { border-color: var(--secondary); box-shadow: var(--glow-purple); }
.btn-export, .btn-import { padding: 6px 10px; font-size: 1rem; }

/* --- Category Tabs --- */
.category-tabs {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab {
  padding: 8px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.tab:hover { border-color: var(--border-hover); color: var(--text); }
.tab.active {
  background: rgba(255, 0, 110, 0.12);
  border-color: var(--primary);
  color: var(--primary);
}
.tab:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* --- Sound Grid --- */
.main {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 16px 20px 80px;
}

.sound-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 12px;
}

/* --- Sound Pad --- */
.sound-pad {
  position: relative;
  aspect-ratio: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
  overflow: hidden;
}

.sound-pad::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at center, var(--pad-color, var(--primary)), transparent 70%);
  opacity: 0;
  transition: opacity 0.15s ease;
}

.sound-pad:hover {
  border-color: var(--pad-color, var(--primary));
  transform: translateY(-2px);
  box-shadow: 0 0 20px color-mix(in srgb, var(--pad-color, var(--primary)) 25%, transparent);
}

.sound-pad:hover::before { opacity: 0.08; }

.sound-pad.playing {
  border-color: var(--pad-color, var(--primary));
  box-shadow: 0 0 30px color-mix(in srgb, var(--pad-color, var(--primary)) 40%, transparent);
  animation: pad-flash 0.3s ease;
}

.sound-pad.playing::before { opacity: 0.2; }

@keyframes pad-flash {
  0% { transform: scale(0.95); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

.pad-emoji {
  font-size: 2rem;
  position: relative;
  z-index: 1;
  transition: transform 0.2s ease;
}

.sound-pad:active .pad-emoji { transform: scale(1.3); }

.pad-name {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
  position: relative;
  z-index: 1;
  max-width: 100%;
  padding: 0 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.pad-shortcut {
  position: absolute;
  top: 6px;
  right: 6px;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.3);
  padding: 2px 5px;
  border-radius: 4px;
  z-index: 1;
  text-transform: uppercase;
}

.pad-loop-indicator {
  position: absolute;
  top: 6px;
  left: 6px;
  font-size: 0.65rem;
  color: var(--accent);
  z-index: 1;
  opacity: 0.7;
}

.pad-volume {
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  z-index: 1;
}

.pad-volume-fill {
  height: 100%;
  border-radius: 3px;
  background: var(--pad-color, var(--primary));
  transition: width 0.2s ease;
}

/* Waveform animation overlay */
.pad-waveform {
  position: absolute;
  bottom: 10px;
  left: 10%;
  width: 80%;
  height: 20px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 1;
}

.sound-pad.playing .pad-waveform { opacity: 1; }

.waveform-bar {
  width: 3px;
  background: var(--pad-color, var(--primary));
  border-radius: 2px;
  animation: waveform 0.8s ease-in-out infinite alternate;
}

.waveform-bar:nth-child(1) { animation-delay: 0s; }
.waveform-bar:nth-child(2) { animation-delay: 0.1s; }
.waveform-bar:nth-child(3) { animation-delay: 0.2s; }
.waveform-bar:nth-child(4) { animation-delay: 0.15s; }
.waveform-bar:nth-child(5) { animation-delay: 0.05s; }

@keyframes waveform {
  from { height: 3px; }
  to { height: 18px; }
}

/* --- Keyboard Help --- */
.keyboard-help {
  position: fixed;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(14, 14, 36, 0.9);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 20px;
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  z-index: 90;
}

.keyboard-help kbd {
  display: inline-block;
  padding: 1px 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  font-family: var(--font);
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* --- Modal --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 90%;
  max-width: 380px;
  overflow: hidden;
  animation: slideUp 0.3s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-size: 1rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.modal-close {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 1.4rem;
  cursor: pointer;
  transition: color var(--transition);
}

.modal-close:hover { color: var(--primary); }

.modal-body { padding: 20px; }

.form-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.checkbox-label {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.form-input {
  padding: 8px 12px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition);
}

.form-input:focus { border-color: var(--primary); }

.modal-actions {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.btn-save {
  flex: 1;
  padding: 10px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-save:hover { transform: translateY(-1px); box-shadow: var(--glow-pink); }

.btn-delete {
  padding: 10px 16px;
  background: rgba(208, 0, 0, 0.15);
  border: 1px solid rgba(208, 0, 0, 0.3);
  border-radius: var(--radius);
  color: #ff5555;
  font-family: var(--font);
  font-weight: 500;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition);
}

.btn-delete:hover { background: rgba(208, 0, 0, 0.25); }

/* --- Responsive --- */
@media (max-width: 768px) {
  .header-content { padding: 8px 12px; }
  .master-volume { display: none; }
  .main { padding: 12px 12px 80px; }
  .sound-grid { grid-template-columns: repeat(auto-fill, minmax(100px, 1fr)); gap: 8px; }
  .pad-emoji { font-size: 1.5rem; }
  .pad-name { font-size: 0.65rem; }
  .category-tabs { padding: 8px 12px; }
}

@media (max-width: 480px) {
  .sound-grid { grid-template-columns: repeat(3, 1fr); }
  .keyboard-help { display: none; }
  .btn-small { padding: 5px 10px; font-size: 0.75rem; }
}