/* Base styles */
body {
  background-color: #f8f9fa;
  padding: 20px;
}

/* Container */
.app-container {
  max-width: 800px;
  margin: 0 auto;
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  padding: 25px;
}

/* Header */
.header-icon {
  color: #e1306c;
  margin-right: 10px;
}

/* File upload */
.file-input-container {
  border: 1px dashed #dee2e6;
  border-radius: 5px;
  padding: 20px;
  text-align: center;
  margin-bottom: 20px;
  background-color: #f8f9fa;
  transition: all 0.3s;
}

.file-input-container:hover {
  border-color: #0d6efd;
  background-color: #f0f7ff;
}

.file-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

/* Data security alert */
.security-icon {
  font-size: 1.5rem;
  margin-right: 1rem;
}

/* Submit button */
.submit-btn {
  background: linear-gradient(45deg, #405de6, #5851db, #833ab4, #c13584, #e1306c, #fd1d1d);
  border: none;
}

.submit-btn:hover {
  opacity: 0.9;
}

/* Loading animation */
@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loader {
  width: 20px;
  height: 20px;
  border: 3px solid #f3f3f3;
  border-top: 3px solid #0d6efd;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-right: 10px;
  display: none;
  vertical-align: middle;
}

/* Footer */
.footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid #dee2e6;
  font-size: 0.85rem;
  color: #6c757d;
  text-align: center;
}