:root {
  /* Modern & Minimal Color Scheme */
  --bs-primary: #1976D2;
  --bs-secondary: #64748b;
  --bs-success: #10b981;
  --bs-info: #0dcaf0;
  --bs-warning: #f59e0b;
  --bs-danger: #dc2626;
  --bs-light: #f8fafc;
  --bs-dark: #1e293b;
  --bs-custom: #1976D2;
   
  /* Functional Colors */
  --bs-body-bg: #f5f5f5;
  --bs-body-color: #1e293b;
  --bs-border-color: #e2e8f0;
  --bs-card-bg: #ffffff;
  --bs-surface: #fafafa;
  --bs-code-bg: #f1f5f9;
  --bs-text-secondary: #475569;
  
  /* UI Properties */
  --bs-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --bs-border-radius: 0.5rem;
}

/* Base Styles */
body {
  background-color: var(--bs-body-bg);
  color: var(--bs-body-color);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
}

.bg-custom {
  background-color: var(--bs-custom) !important;
}
.text-custom {
  color: var(--bs-custom) !important;
}
.btn-custom {
  background-color: var(--bs-custom) !important;
  color: #fff !important;
  border: none;
}

.btn-custom:hover {
  background-color: color-mix(in srgb, var(--bs-custom) 90%, black);
}

.btn-outline-custom {
  color: var(--bs-custom);
  border: 1px solid var(--bs-custom);
  background-color: transparent;
}

.btn-outline-custom:hover {
  background-color: var(--bs-custom);
  color: #fff;
}

/* Enhanced Card Styling */
.card {
  background-color: var(--bs-card-bg);
  border-color: var(--bs-border-color);
  border-radius: var(--bs-border-radius);
  box-shadow: var(--bs-shadow);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
}

/* Enhanced Tab Styling */
.nav-tabs .nav-link {
  border: 1px solid var(--bs-border-color);
  background-color: var(--bs-surface);
  color: var(--bs-text-secondary);
  font-weight: 500;
  transition: all 0.2s ease;
  border-radius: var(--bs-border-radius) var(--bs-border-radius) 0 0;
}

.nav-tabs .nav-link.active {
  background-color: var(--bs-primary);
  border-color: var(--bs-primary);
  color: white;
}

.nav-tabs .nav-link:hover:not(.active) {
  background-color: var(--bs-code-bg);
  border-color: var(--bs-border-color);
}

/* Small tabs utility */
.nav-tabs-sm .nav-link {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

/* Enhanced Button Styling */
.btn {
  border-radius: var(--bs-border-radius);
  font-weight: 500;
  transition: all 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

/* Custom Scanner Components */
.video-wrap {
  background: var(--bs-code-bg);
  border: 1px solid var(--bs-border-color);
  border-radius: var(--bs-border-radius);
  transition: all 0.3s ease;
}

.status {
  position: absolute;
  left: 8px;
  bottom: 8px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--bs-dark);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.85rem;
  border: 1px solid var(--bs-border-color);
  backdrop-filter: blur(10px);
}

.loader {
  position: absolute;
  inset: auto auto 8px 8px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--bs-border-color);
  border-top-color: var(--bs-primary);
  animation: spin 1s linear infinite;
  display: none;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.dropzone {
  border: 2px dashed var(--bs-border-color);
  background-color: var(--bs-surface);
  color: var(--bs-text-secondary);
  transition: all 0.3s ease;
  cursor: pointer;
  border-radius: var(--bs-border-radius);
}

.dropzone:hover, .dropzone.active {
  border-color: var(--bs-primary);
  background-color: rgba(37, 99, 235, 0.05);
  transform: translateY(-1px);
}

.image-preview-container {
  position: relative;
  width: 100%;
  max-width: 250px;
  margin: 0 auto 1rem;
  border: 1px solid var(--bs-border-color);
  border-radius: var(--bs-border-radius);
  overflow: hidden;
  display: none;
  background-color: var(--bs-code-bg);
}

.image-preview-container.has-image {
  display: block !important;
}

.image-preview-container img {
  width: 100%;
  height: auto;
  display: block;
}

.remove-image-btn {
  position: absolute;
  top: 5px;
  right: 5px;
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--bs-danger);
  border: none;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--bs-shadow);
  transition: all 0.2s ease;
}

.remove-image-btn:hover {
  background-color: var(--bs-danger);
  color: #ffffff;
  transform: scale(1.1);
}

.scan-time-label {
  font-size: 0.75rem;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  background-color: var(--bs-success);
  color: #ffffff;
  margin-left: auto;
  display: none;
  align-items: center;
}

.scan-success {
  border-color: var(--bs-success) !important;
  box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.1) !important;
  animation: pulseSuccess 2s ease-in-out;
}

.scan-error {
  border-color: var(--bs-danger) !important;
  box-shadow: 0 0 0 2px rgba(220, 38, 38, 0.1) !important;
  animation: shake 0.5s ease-in-out;
}

@keyframes pulseSuccess {
  0%, 100% { box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.1); }
  50% { box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

/* Enhanced Form Elements */
.form-control {
  border-radius: var(--bs-border-radius);
  border: 1px solid var(--bs-border-color);
  transition: all 0.2s ease;
}

.form-control:focus {
  border-color: var(--bs-primary);
  box-shadow: 0 0 0 0.2rem rgba(37, 99, 235, 0.1);
}

/* Code block styling */
.code {
  background: var(--bs-code-bg);
  border: 1px solid var(--bs-border-color);
  color: var(--bs-body-color);
  border-radius: var(--bs-border-radius);
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  .card-body {
    padding: 1rem;
  }
  
  .nav-tabs .nav-link {
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
  }
}

/* Accessibility Improvements */
.btn:focus-visible,
.form-control:focus-visible {
  outline: 2px solid var(--bs-primary);
  outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .card,
  .btn,
  .dropzone,
  .remove-image-btn {
    transition: none;
  }
  
  .loader {
    animation-duration: 2s;
  }
}