/* =========================================================
   AUDIO EDITOR — styles.css
   Animaciones personalizadas y diseño premium
   ========================================================= */

/* ── Importar fuente moderna ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ── Variables de diseño ── */
:root {
  --bg-primary:    #0a0e1a;
  --bg-secondary:  #111827;
  --bg-card:       #151d2e;
  --bg-glass:      rgba(21, 29, 46, 0.85);
  --accent:        #6c63ff;
  --accent-2:      #00d4ff;
  --accent-3:      #ff6584;
  --text-primary:  #e8eaf6;
  --text-muted:    #6b7280;
  --border-color:  rgba(108, 99, 255, 0.2);
  --glow:          0 0 20px rgba(108, 99, 255, 0.4);
  --glow-cyan:     0 0 20px rgba(0, 212, 255, 0.4);
  --radius:        14px;
  --transition:    all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset y base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

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

/* ── Fondo animado con partículas pseudo ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(108,99,255,0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(0,212,255,0.08) 0%, transparent 50%),
    radial-gradient(ellipse 40% 40% at 50% 50%, rgba(255,101,132,0.05) 0%, transparent 50%);
  pointer-events: none;
  z-index: 0;
}

/* ── Navbar ── */
.navbar-brand span {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  font-size: 1.4rem;
  letter-spacing: -0.5px;
}

.navbar {
  background: rgba(10, 14, 26, 0.9) !important;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  animation: slideDown 0.6s ease;
}

/* ── Layout principal ── */
main {
  position: relative;
  z-index: 1;
  padding: 2rem 0 4rem;
}

/* ── Cards ── */
.ae-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  backdrop-filter: blur(10px);
}

.ae-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(108,99,255,0.04) 0%, transparent 60%);
  pointer-events: none;
}

.ae-card:hover {
  border-color: rgba(108, 99, 255, 0.45);
  transform: translateY(-2px);
  box-shadow: var(--glow);
}

/* ── Zona de arrastrar y soltar ── */
#drop-zone {
  border: 2px dashed rgba(108, 99, 255, 0.4);
  border-radius: var(--radius);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: var(--transition);
  background: rgba(108, 99, 255, 0.03);
  position: relative;
  overflow: hidden;
}

#drop-zone::after {
  content: '';
  position: absolute;
  inset: -50%;
  background: conic-gradient(from 0deg, transparent 70%, rgba(108,99,255,0.15) 100%);
  animation: rotateBorder 4s linear infinite;
  opacity: 0;
  transition: opacity 0.3s ease;
}

#drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(108, 99, 255, 0.1);
  box-shadow: var(--glow);
}

#drop-zone.drag-over::after { opacity: 1; }

#drop-zone.has-file {
  border-color: rgba(0, 212, 255, 0.5);
  background: rgba(0, 212, 255, 0.04);
}

.drop-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  display: block;
  animation: float 3s ease-in-out infinite;
}

.drop-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.drop-sub {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ── Visualizador de forma de onda ── */
#waveform-canvas {
  width: 100%;
  height: 120px;
  border-radius: 10px;
  background: rgba(0,0,0,0.3);
  display: block;
  border: 1px solid var(--border-color);
}

/* ── Canvas de espectro ── */
#spectrum-canvas {
  width: 100%;
  height: 180px;
  border-radius: 10px;
  background: rgba(0,0,0,0.4);
  display: block;
  border: 1px solid var(--border-color);
  position: relative;
}

.canvas-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

/* ── Botones de control de reproducción ── */
.btn-play-group {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.btn-ctrl {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.875rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  letter-spacing: 0.3px;
}

.btn-ctrl::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background 0.2s ease;
}

.btn-ctrl:hover::after { background: rgba(255,255,255,0.08); }
.btn-ctrl:active { transform: scale(0.96); }
.btn-ctrl:disabled { opacity: 0.35; cursor: not-allowed; transform: none !important; }

/* Botón Play */
.btn-play {
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  color: #fff;
  box-shadow: 0 4px 15px rgba(108,99,255,0.4);
}
.btn-play:hover:not(:disabled) {
  box-shadow: 0 6px 25px rgba(108,99,255,0.6);
  transform: translateY(-2px) scale(1.02);
}

/* Botón Pause */
.btn-pause {
  background: linear-gradient(135deg, #f59e0b, #ef4444);
  color: #fff;
  box-shadow: 0 4px 15px rgba(245,158,11,0.3);
}
.btn-pause:hover:not(:disabled) {
  box-shadow: 0 6px 25px rgba(245,158,11,0.5);
  transform: translateY(-2px) scale(1.02);
}

/* Botón Stop */
.btn-stop {
  background: linear-gradient(135deg, #374151, #1f2937);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.1);
}
.btn-stop:hover:not(:disabled) {
  background: linear-gradient(135deg, #4b5563, #374151);
  transform: translateY(-2px) scale(1.02);
}

/* Botón Exportar */
.btn-export {
  background: linear-gradient(135deg, var(--accent-2), #0ea5e9);
  color: #000;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(0,212,255,0.35);
  width: 100%;
  justify-content: center;
  padding: 0.85rem;
  font-size: 1rem;
  border-radius: var(--radius);
}
.btn-export:hover:not(:disabled) {
  box-shadow: 0 8px 30px rgba(0,212,255,0.55);
  transform: translateY(-3px);
}

/* ── Sliders personalizados ── */
.ae-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255,255,255,0.1);
  outline: none;
  cursor: pointer;
  transition: var(--transition);
}

.ae-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  cursor: pointer;
  box-shadow: 0 0 10px rgba(108,99,255,0.5);
  transition: var(--transition);
  border: 2px solid rgba(255,255,255,0.2);
}

.ae-range::-webkit-slider-thumb:hover {
  transform: scale(1.3);
  box-shadow: 0 0 18px rgba(108,99,255,0.7);
}

.ae-range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  cursor: pointer;
  box-shadow: 0 0 10px rgba(108,99,255,0.5);
  border: 2px solid rgba(255,255,255,0.2);
}

.ae-range.noise {
  --thumb-color: var(--accent-3);
}
.ae-range.noise::-webkit-slider-thumb {
  background: linear-gradient(135deg, var(--accent-3), #f97316);
  box-shadow: 0 0 10px rgba(255,101,132,0.5);
}
.ae-range.noise::-webkit-slider-thumb:hover {
  box-shadow: 0 0 18px rgba(255,101,132,0.7);
}

/* ── Labels de control ── */
.ctrl-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.ctrl-label .value-badge {
  background: rgba(108,99,255,0.2);
  color: var(--accent);
  border: 1px solid rgba(108,99,255,0.3);
  border-radius: 6px;
  padding: 0.15rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  min-width: 50px;
  text-align: center;
  transition: var(--transition);
}

.ctrl-label .value-badge.noise-badge {
  background: rgba(255,101,132,0.2);
  color: var(--accent-3);
  border-color: rgba(255,101,132,0.3);
}

/* ── Track de progreso ── */
.progress-wrap {
  position: relative;
  cursor: pointer;
  user-select: none;
}

#progress-bar {
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}

#progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 3px;
  transition: width 0.1s linear;
  position: relative;
}

#progress-fill::after {
  content: '';
  position: absolute;
  right: -5px;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 8px var(--accent-2);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.progress-wrap:hover #progress-fill::after { opacity: 1; }

.time-display {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
  font-variant-numeric: tabular-nums;
}

/* ── Estado / información del archivo ── */
.file-info {
  display: none;
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  margin-top: 1rem;
  animation: fadeInUp 0.4s ease;
}

.file-info.show { display: flex; align-items: center; gap: 0.75rem; }

.file-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.file-name {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--accent-2);
  word-break: break-all;
}

.file-size {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ── Toast de notificación ── */
.ae-toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.ae-toast {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 0.9rem 1.2rem;
  min-width: 260px;
  max-width: 340px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  backdrop-filter: blur(20px);
  animation: toastIn 0.4s cubic-bezier(0.34,1.56,0.64,1);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

.ae-toast.success { border-color: rgba(34,197,94,0.4); }
.ae-toast.error   { border-color: rgba(239,68,68,0.4); }
.ae-toast.info    { border-color: rgba(108,99,255,0.4); }
.ae-toast.warning { border-color: rgba(245,158,11,0.4); }

.ae-toast.hide {
  animation: toastOut 0.3s ease forwards;
}

/* ── Indicador de "cargando" / exportando ── */
.spinner-ring {
  width: 22px;
  height: 22px;
  border: 3px solid rgba(0,212,255,0.2);
  border-top-color: var(--accent-2);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

/* ── Barra de estado de reproducción ── */
.playback-state {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  background: rgba(108,99,255,0.1);
  border: 1px solid rgba(108,99,255,0.2);
  color: var(--text-muted);
  transition: var(--transition);
}

.playback-state.playing {
  background: rgba(34,197,94,0.15);
  border-color: rgba(34,197,94,0.35);
  color: #4ade80;
}

.playback-state.paused {
  background: rgba(245,158,11,0.15);
  border-color: rgba(245,158,11,0.35);
  color: #fbbf24;
}

.dot-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
}

.playback-state.playing .dot-pulse {
  animation: pulse 1.2s ease-in-out infinite;
}

/* ── Sección de título de tarjeta ── */
.card-heading {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-color);
}

.card-heading .icon {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.icon-purple { background: rgba(108,99,255,0.2); }
.icon-cyan   { background: rgba(0,212,255,0.2); }
.icon-pink   { background: rgba(255,101,132,0.2); }
.icon-green  { background: rgba(34,197,94,0.2); }

.card-heading h6 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.2px;
}

/* ── Sección del ecualizador ── */
.eq-band-group {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  justify-content: center;
  flex-wrap: wrap;
}

.eq-band {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  min-width: 50px;
}

.eq-band label {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.eq-band input[type="range"] {
  -webkit-appearance: slider-vertical;
  appearance: slider-vertical;
  writing-mode: vertical-lr;
  direction: rtl;
  width: 28px;
  height: 100px;
  cursor: pointer;
  accent-color: var(--accent);
}

.eq-value {
  font-size: 0.72rem;
  color: var(--accent);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  min-width: 36px;
  text-align: center;
}

/* ── Botón de reset pequeño ── */
.btn-sm-reset {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-muted);
  border-radius: 7px;
  padding: 0.3rem 0.7rem;
  font-size: 0.75rem;
  cursor: pointer;
  transition: var(--transition);
}
.btn-sm-reset:hover {
  background: rgba(255,255,255,0.12);
  color: var(--text-primary);
}

/* ── Noise gate toggle ── */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}
.toggle-switch input { display: none; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  border-radius: 12px;
  cursor: pointer;
  transition: 0.3s ease;
  border: 1px solid rgba(255,255,255,0.1);
}
.toggle-slider::before {
  content: '';
  position: absolute;
  left: 3px;
  top: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: 0.3s ease;
}
.toggle-switch input:checked + .toggle-slider {
  background: rgba(255,101,132,0.3);
  border-color: rgba(255,101,132,0.4);
}
.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
  background: var(--accent-3);
  box-shadow: 0 0 8px rgba(255,101,132,0.6);
}

/* ── Header del editor (hero mini) ── */
.editor-hero {
  text-align: center;
  padding: 2rem 0 1.5rem;
  animation: fadeInUp 0.7s ease;
}

.editor-hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 50%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  margin-bottom: 0.5rem;
}

.editor-hero p {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 480px;
  margin: 0 auto;
}

/* ── Formato del footer ── */
footer {
  text-align: center;
  padding: 1.5rem;
  color: var(--text-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--border-color);
  background: rgba(10,14,26,0.7);
  backdrop-filter: blur(10px);
}

/* =============================================
   ANIMACIONES KEYFRAMES
   ============================================= */

/* Entrada desde abajo */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Entrada desde arriba (navbar) */
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Flotación suave (ícono drop zone) */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

/* Rotación borde drop zone activo */
@keyframes rotateBorder {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Pulso del punto de reproducción */
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%       { transform: scale(1.6); opacity: 0.5; }
}

/* Spinner de carga */
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Toast entrada */
@keyframes toastIn {
  from { opacity: 0; transform: translateX(60px) scale(0.9); }
  to   { opacity: 1; transform: translateX(0) scale(1); }
}

/* Toast salida */
@keyframes toastOut {
  from { opacity: 1; transform: translateX(0) scale(1); }
  to   { opacity: 0; transform: translateX(60px) scale(0.9); }
}

/* Aparición escalonada de tarjetas */
.ae-card { animation: fadeInUp 0.5s ease both; }
.ae-card:nth-child(1) { animation-delay: 0.05s; }
.ae-card:nth-child(2) { animation-delay: 0.10s; }
.ae-card:nth-child(3) { animation-delay: 0.15s; }
.ae-card:nth-child(4) { animation-delay: 0.20s; }

/* Parpadeo de la barra de espectro cuando no hay audio */
@keyframes barIdle {
  0%, 100% { transform: scaleY(0.1); }
  50%       { transform: scaleY(0.3); }
}

/* ── Responsive tweaks ── */
@media (max-width: 768px) {
  .btn-ctrl { padding: 0.55rem 1.1rem; font-size: 0.8rem; }
  .btn-export { font-size: 0.9rem; }
  .eq-band input[type="range"] { height: 70px; }
}