/* Botón de audio (Play) dentro de la barra */
.play-button {
      position: relative;
      width: 72px; /* Un poco más grande */
      height: 72px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      color: #fff;
      cursor: pointer;
      border: 2px solid rgba(255, 255, 255, 0.8);
      background: linear-gradient(135deg, rgba(255,107,107,0.95) 0%, rgba(200,80,192,0.95) 100%);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      z-index: 1000;
      box-shadow: 
        0 8px 25px rgba(200, 80, 192, 0.4),
        inset 0 4px 6px rgba(255, 255, 255, 0.4),
        inset 0 -4px 6px rgba(0, 0, 0, 0.1);
      transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.play-button::before {
      content: '';
      position: absolute;
      inset: -4px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ff6b6b, #c850c0);
      z-index: -1;
      filter: blur(16px);
      opacity: 0.5;
      transition: opacity 0.4s ease, filter 0.4s ease;
}

.play-button:hover {
     transform: scale(1.08); /* Quitando el translateY porque queremo mantenerlo centrado */
     box-shadow: 
        0 14px 30px rgba(200, 80, 192, 0.5),
        inset 0 4px 6px rgba(255, 255, 255, 0.5),
        inset 0 -4px 6px rgba(0, 0, 0, 0.1);
     border-color: #fff;
}

.play-button:hover::before {
     opacity: 0.8;
     filter: blur(20px);
}

.play-button:active {
     transform: scale(0.95);
     box-shadow: 
        0 8px 15px rgba(200, 80, 192, 0.4),
        inset 0 4px 10px rgba(0, 0, 0, 0.1);
}

.play-button i {
      filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
      transition: transform 0.3s ease;
      margin-left: 3px;
}

.play-button.playing i {
      margin-left: 0;
}

.play-button.playing {
     background: linear-gradient(135deg, rgba(67,233,123,0.95) 0%, rgba(56,249,215,0.95) 100%);
     box-shadow: 
        0 12px 30px rgba(67, 233, 123, 0.4),
        inset 0 4px 6px rgba(255, 255, 255, 0.5),
        inset 0 -4px 6px rgba(0, 0, 0, 0.1);
     border-color: rgba(255, 255, 255, 0.9);
}

.play-button.playing::before {
     background: linear-gradient(135deg, #43e97b, #38f9d7);
     animation: pulse-ring 2s infinite cubic-bezier(0.215, 0.61, 0.355, 1);
     display: block; /* Asegurando que se muestre porque lo habíamos deshabilitado para el estilo blanco */
}

@keyframes pulse-ring {
     0% { transform: scale(1); opacity: 0.7; }
     70% { transform: scale(1.5); opacity: 0; }
     100% { transform: scale(1); opacity: 0; }
}

/* Responsive para botón de audio */
@media (max-width: 768px) {
      .play-button {
          width: 60px;
          height: 60px;
          font-size: 1.3rem;
      }
 }

@media (max-width: 480px) {
      .play-button {
          width: 56px;
          height: 56px;
          font-size: 1.25rem;
      }
 }