/* Modern CSS Variables for Theme Support */
:root {
  --bs-primary: #0d6efd;
  --bs-primary-rgb: 13, 110, 253;
  --bs-secondary: #6c757d;
  --bs-success: #198754;
  --bs-info: #0dcaf0;
  --bs-warning: #ffc107;
  --bs-danger: #dc3545;
  --bs-light: #f8f9fa;
  --bs-dark: #212529;
  
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
  --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
  
  --border-radius: 0.5rem;
  --border-radius-lg: 1rem;
  --transition: all 0.3s ease;
}

/* Dark Theme Variables */
[data-bs-theme="dark"] {
  --bs-body-bg: #1a1a1a;
  --bs-body-color: #ffffff;
  --bs-primary: #0d6efd;
  --bs-secondary: #6c757d;
  --bs-light: #2d2d2d;
  --bs-dark: #ffffff;
}

/* Base Styles */
html {
  font-size: 14px;
  scroll-behavior: smooth;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--bs-body-color);
  background-color: var(--bs-body-bg);
  transition: var(--transition);
}

/* Focus Styles */
.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, 
.form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.25);
}

/* Custom Button Styles */
.btn {
  border-radius: var(--border-radius);
  font-weight: 500;
  transition: var(--transition);
  border: none;
  box-shadow: var(--shadow-sm);
}

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

.btn:active {
  transform: translateY(0);
}

.btn-lg {
  padding: 0.75rem 2rem;
  font-size: 1.1rem;
}

/* Card Styles */
.card {
  border-radius: var(--border-radius-lg);
  border: none;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.service-card {
  background: linear-gradient(145deg, #ffffff 0%, #f8f9fa 100%);
  border: 1px solid rgba(0,0,0,0.05);
}

[data-bs-theme="dark"] .service-card {
  background: linear-gradient(145deg, #2d2d2d 0%, #1a1a1a 100%);
  border: 1px solid rgba(255,255,255,0.1);
}

/* Form Styles */
.form-control {
  border-radius: var(--border-radius);
  border: 2px solid #e9ecef;
  transition: var(--transition);
  padding: 0.75rem 1rem;
}

.form-control:focus {
  border-color: var(--bs-primary);
  box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.25);
}

/* Alert Styles */
.alert {
  border-radius: var(--border-radius);
  border: none;
  box-shadow: var(--shadow-sm);
}

/* Loading States */
.loading {
  position: relative;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid #f3f3f3;
  border-top: 2px solid var(--bs-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.6s ease-out;
}

/* Service Icon Styles */
.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--bs-primary) 0%, var(--bs-info) 100%);
  border-radius: 50%;
  color: white;
  margin: 0 auto;
  box-shadow: var(--shadow);
}

.service-card[data-service="unlock"] .service-icon {
  background: linear-gradient(135deg, var(--bs-success) 0%, #20c997 100%);
}

/* Progress Bar Styles */
.progress {
  height: 8px;
  border-radius: var(--border-radius);
  background-color: rgba(0,0,0,0.1);
}

.progress-bar {
  border-radius: var(--border-radius);
  transition: width 0.6s ease;
}

/* Modal Styles */
.modal-content {
  border-radius: var(--border-radius-lg);
  border: none;
  box-shadow: var(--shadow-lg);
}

.modal-header {
  border-bottom: 1px solid rgba(0,0,0,0.1);
  border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

.modal-footer {
  border-top: 1px solid rgba(0,0,0,0.1);
  border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
  .display-4 {
    font-size: 2.5rem;
  }
  
  .btn-lg {
    padding: 0.6rem 1.5rem;
    font-size: 1rem;
  }
  
  .service-icon {
    width: 60px;
    height: 60px;
  }
  
  .service-icon i {
    font-size: 2rem !important;
  }
}

/* Print Styles */
@media print {
  .navbar, .btn, footer {
    display: none !important;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #dee2e6;
  }
}

/* Accessibility Improvements */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  .btn {
    border: 2px solid currentColor;
  }
  
  .card {
    border: 2px solid currentColor;
  }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}