static/css/style.css

/* Custom Bootstrap overrides */
:root {
  --primary-color: #4e73df;
  --secondary-color: #858796;
  --success-color: #1cc88a;
}

body {
  background-color: #f8f9fc;
  font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

.card {
  border: none;
  border-radius: 0.35rem;
  box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
}

.card-header {
  background-color: var(--primary-color);
  border-bottom: none;
}

.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: #2e59d9;
  border-color: #2653d4;
}

/* Upload area styling */
.upload-area {
  border: 2px dashed #d1d3e2;
  border-radius: 0.35rem;
  padding: 2rem;
  text-align: center;
  margin-bottom: 1.5rem;
  cursor: pointer;
  transition: all 0.3s;
}

.upload-area:hover {
  border-color: var(--primary-color);
  background-color: rgba(78, 115, 223, 0.05);
}

.upload-area i {
  font-size: 3rem;
  color: var(--secondary-color);
  margin-bottom: 1rem;
}

/* Video result styling */
#result {
  transition: all 0.3s;
}

#outputVideo {
  border-radius: 0.35rem;
  background-color: #000;
}

/* Loading spinner */
.spinner-border {
  width: 1.2rem;
  height: 1.2rem;
  border-width: 0.15em;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .card-body {
    padding: 1.25rem;
  }
  
  .upload-area {
    padding: 1.5rem;
  }
}

/* Animation for processing state */
@keyframes pulse {
  0% { opacity: 0.6; }
  50% { opacity: 1; }
  100% { opacity: 0.6; }
}

.processing {
  animation: pulse 1.5s infinite;
}