/* ==========================================================================
   Meta Animation & Keyframe Styling
   ========================================================================== */

/* Shimmer Light Effect */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.shimmer-badge {
  background: linear-gradient(90deg, rgba(8,102,255,0.1) 0%, rgba(0,198,255,0.3) 50%, rgba(8,102,255,0.1) 100%);
  background-size: 200% 100%;
  animation: shimmer 4s infinite linear;
}

/* Floating Meta 3D Element */
@keyframes floatY {
  0% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(2deg); }
  100% { transform: translateY(0px) rotate(0deg); }
}

.floating-anim {
  animation: floatY 6s ease-in-out infinite;
}

/* Ripple Glow Effect on Buttons */
.btn-primary {
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 300%;
  height: 300%;
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -50%) scale(0);
  border-radius: 50%;
  transition: transform 0.6s ease-out;
}

.btn-primary:active::after {
  transform: translate(-50%, -50%) scale(1);
  transition: 0s;
}

/* Modal Styling for Detailed Notes / Speech Reader */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(7, 12, 30, 0.7);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  width: 90%;
  max-width: 600px;
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.modal-overlay.active .modal-content {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: transparent;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover {
  background: var(--meta-blue);
  color: white;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.toast {
  padding: 0.85rem 1.5rem;
  background: var(--meta-gradient);
  color: white;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 10px 25px rgba(8, 102, 255, 0.4);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  animation: slideInRight 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
}

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
  to { opacity: 0; transform: translateY(10px); }
}