/* CrystalBudget - Clean Modern Theme */
/* Improved readability, theme switching, responsive design */

:root {
  /* Light theme (default) */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: rgba(255, 255, 255, 0.95);
  --bg-nav: rgba(255, 255, 255, 0.95);
  
  /* Text Colors - High Contrast for Readability */
  --text-primary: #1a202c;
  --text-secondary: #4a5568;
  --text-muted: #718096;
  --text-on-dark: #ffffff;
  
  /* Accent Colors */
  --primary-color: #667eea;
  --primary-dark: #5a67d8;
  --success-color: #48bb78;
  --warning-color: #ed8936;
  --danger-color: #f56565;
  --info-color: #4299e1;
  
  /* Currency Colors */
  --rub-color: #48bb78;
  --usd-color: #4299e1;
  --eur-color: #ed8936;
  
  /* Gradients */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --success-gradient: linear-gradient(135deg, #48bb78 0%, #38a169 100%);
  --warning-gradient: linear-gradient(135deg, #ed8936 0%, #dd6b20 100%);
  --danger-gradient: linear-gradient(135deg, #f56565 0%, #e53e3e 100%);
  
  /* Borders and Shadows */
  --border-color: rgba(0, 0, 0, 0.1);
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  
  /* Transitions - Only for hover effects */
  --transition: all 0.2s ease-in-out;
  --transition-fast: all 0.15s ease-in-out;
  
  /* Focus styles for accessibility */
  --focus-ring: 0 0 0 3px rgba(13, 110, 253, 0.25);
}

/* Dark theme - Bootstrap compatible */
[data-bs-theme="dark"],
[data-theme="dark"] {
  --bg-primary: #212529;
  --bg-secondary: #343a40;
  --bg-card: rgba(52, 58, 64, 0.95);
  --bg-nav: rgba(33, 37, 41, 0.95);
  
  --text-primary: #f8f9fa;
  --text-secondary: #e9ecef;
  --text-muted: #adb5bd;
  
  --border-color: rgba(255, 255, 255, 0.125);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.6);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.6);
  
  /* Bootstrap overrides for dark theme */
  --bs-body-bg: #212529;
  --bs-body-color: #f8f9fa;
  --bs-border-color: rgba(255, 255, 255, 0.125);
  --bs-secondary-bg: #343a40;
  --bs-tertiary-bg: #495057;
}

/* Base Styles */
* {
  box-sizing: border-box;
}

/* Prevent flash of unstyled content in dark theme */
html {
  color-scheme: light dark;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  margin: 0;
  padding: 0;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Navigation */
.navbar-modern {
  background: var(--bg-nav);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar-brand-modern {
  font-weight: 700;
  font-size: 1.5rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

/* Crystal glow effect on logo hover */
.navbar-brand-modern:hover {
  transform: scale(1.05);
}

.navbar-brand-modern:hover i {
  color: #667eea;
  filter: drop-shadow(0 0 8px rgba(102, 126, 234, 0.6));
  animation: crystalGlow 1s ease-in-out;
}

@keyframes crystalGlow {
  0%, 100% { filter: drop-shadow(0 0 8px rgba(102, 126, 234, 0.6)); }
  50% { filter: drop-shadow(0 0 15px rgba(102, 126, 234, 0.9)); }
}

.nav-link-modern {
  color: var(--text-secondary);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: var(--border-radius);
  transition: var(--transition);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  position: relative;
}

.nav-link-modern:hover {
  color: var(--text-primary);
  background: var(--bg-card);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* Active page indicator */
.nav-link-modern.active {
  color: var(--primary-color);
  background: rgba(102, 126, 234, 0.1);
  font-weight: 600;
}

.nav-link-modern.active::before {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--primary-color);
  border-radius: 2px;
}

/* Theme Toggle Switch */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.theme-toggle:hover {
  background: var(--bg-secondary);
  box-shadow: var(--shadow-sm);
}

.theme-switch {
  position: relative;
  width: 48px;
  height: 24px;
  background: var(--text-muted);
  border-radius: 12px;
  transition: var(--transition);
  cursor: pointer;
}

.theme-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: white;
  border-radius: 50%;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

[data-bs-theme="dark"] .theme-switch,
[data-theme="dark"] .theme-switch {
  background: var(--primary-color);
}

[data-bs-theme="dark"] .theme-switch::after,
[data-theme="dark"] .theme-switch::after {
  transform: translateX(24px);
}

/* Currency Selection */
.currency-selector {
  display: inline-flex;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.currency-option {
  padding: 6px 12px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  font-size: 0.875rem;
  border: none;
  background: transparent;
  color: var(--text-secondary);
}

.currency-option:hover {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

.currency-option.active {
  background: var(--primary-color);
  color: white;
}

.currency-option.active.rub { background: var(--rub-color); }
.currency-option.active.usd { background: var(--usd-color); }
.currency-option.active.eur { background: var(--eur-color); }

/* Cards */
.modern-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

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

.modern-card .card-body {
  padding: 1.5rem;
}

.modern-card .card-title {
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

/* Buttons - Fixed text overflow */
.btn-modern {
  background: var(--primary-gradient);
  border: none;
  border-radius: var(--border-radius);
  color: white;
  font-weight: 500;
  padding: 10px 16px;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.875rem;
  min-height: 44px;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
  line-height: 1.2;
}

.btn-modern:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  filter: brightness(1.1);
}

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

.btn-modern-success {
  background: var(--success-gradient);
}

.btn-modern-warning {
  background: var(--warning-gradient);
}

.btn-modern-danger {
  background: var(--danger-gradient);
}

.btn-modern-outline {
  background: transparent;
  border: 2px solid var(--primary-color);
  color: var(--primary-color);
}

.btn-modern-outline:hover {
  background: var(--primary-color);
  color: white;
}

/* Small buttons for mobile */
@media (max-width: 768px) {
  .btn-modern {
    padding: 8px 12px;
    font-size: 0.8125rem;
    min-height: 40px;
  }
  
  .btn-modern i {
    font-size: 0.875rem;
  }
}

/* Form Elements */
.form-modern {
  background: var(--bg-card);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius);
  color: var(--text-primary);
  padding: 12px 16px;
  transition: var(--transition);
  font-size: 1rem;
  min-height: 44px;
  width: 100%;
}

.form-modern::placeholder {
  color: var(--text-muted);
}

.form-modern:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  background: var(--bg-secondary);
}

/* Form Labels */
.form-label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
}

/* Tables */
.table-modern {
  background: transparent;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  width: 100%;
}

.table-modern thead {
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--border-color);
}

.table-modern thead th {
  border: none;
  padding: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  font-size: 0.875rem;
}

.table-modern tbody tr {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.table-modern tbody tr:hover {
  background: var(--bg-secondary);
  transform: scale(1.01);
}

.table-modern tbody td {
  border: none;
  padding: 1rem;
  vertical-align: middle;
  color: var(--text-primary);
  font-size: 0.875rem;
}

/* Progress Bars */
.progress-modern {
  background: var(--border-color);
  border-radius: 50px;
  height: 8px;
  overflow: hidden;
  position: relative;
}

.progress-bar-modern {
  height: 100%;
  border-radius: 50px;
  transition: var(--transition);
}

.progress-success {
  background: var(--success-gradient);
}

.progress-warning {
  background: var(--warning-gradient);
}

.progress-danger {
  background: var(--danger-gradient);
}

/* Badges */
.badge-modern {
  padding: 4px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.badge-modern-success {
  background: var(--success-color);
  color: white;
}

.badge-modern-warning {
  background: var(--warning-color);
  color: white;
}

.badge-modern-danger {
  background: var(--danger-color);
  color: white;
}

.badge-modern-info {
  background: var(--info-color);
  color: white;
}

/* Utility Classes */
.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-primary {
  color: var(--text-primary) !important;
}

.text-secondary {
  color: var(--text-secondary) !important;
}

.text-muted {
  color: var(--text-muted) !important;
}

/* Layout */
.container-modern {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

/* Responsive Grid */
@media (min-width: 576px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .container-modern {
    padding: 0 1.5rem;
  }
}

@media (min-width: 992px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1200px) {
  .card-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  .navbar-modern {
    padding: 0.75rem 0;
  }
  
  .navbar-brand-modern {
    font-size: 1.25rem;
  }
  
  .modern-card .card-body {
    padding: 1rem;
  }
  
  .form-modern {
    padding: 10px 12px;
    font-size: 16px; /* Prevents zoom on iOS */
  }
  
  .table-modern {
    font-size: 0.8125rem;
  }
  
  .table-modern thead th,
  .table-modern tbody td {
    padding: 0.75rem 0.5rem;
  }
  
  .currency-selector {
    flex-direction: column;
    width: 100%;
  }
  
  .currency-option {
    text-align: center;
    padding: 8px 12px;
  }
  
  .theme-toggle {
    padding: 6px 10px;
  }
  
  .theme-switch {
    width: 40px;
    height: 20px;
  }
  
  .theme-switch::after {
    width: 16px;
    height: 16px;
  }
  
  [data-bs-theme="dark"] .theme-switch::after,
  [data-theme="dark"] .theme-switch::after {
    transform: translateX(20px);
  }
}

/* Extra small screens */
@media (max-width: 576px) {
  .container-modern {
    padding: 0 0.75rem;
  }
  
  .btn-modern {
    padding: 6px 10px;
    font-size: 0.75rem;
    min-height: 36px;
  }
  
  .form-modern {
    padding: 8px 10px;
  }
  
  .modern-card .card-body {
    padding: 0.75rem;
  }
  
  .badge-modern {
    padding: 2px 6px;
    font-size: 0.6875rem;
  }
}

/* Large screens */
@media (min-width: 1400px) {
  .container-modern {
    max-width: 1320px;
  }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --border-color: rgba(0, 0, 0, 0.3);
    --text-muted: #666;
  }
  
  [data-bs-theme="dark"],
  [data-theme="dark"] {
    --border-color: rgba(255, 255, 255, 0.3);
    --text-muted: #999;
  }
  
  .modern-card {
    border-width: 2px;
  }
  
  .form-modern {
    border-width: 2px;
  }
}

/* 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;
  }
  
  /* Keep only essential hover transitions */
  .btn-modern:hover,
  .nav-link-modern:hover,
  .modern-card:hover {
    transition-duration: 0.15s !important;
  }
}

/* Focus Styles for Accessibility */
.btn-modern:focus,
.form-modern:focus,
.nav-link-modern:focus,
.theme-toggle:focus,
.currency-option:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Print Styles */
@media print {
  .navbar-modern,
  .theme-toggle,
  .currency-selector,
  .btn-modern {
    display: none !important;
  }
  
  .modern-card {
    box-shadow: none;
    border: 1px solid #000;
    break-inside: avoid;
    page-break-inside: avoid;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .text-gradient {
    color: black !important;
    -webkit-text-fill-color: black !important;
  }
}
/* Enhanced Focus Styles for Accessibility */
.form-control:focus-visible,
.form-select:focus-visible,
.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring) !important;
  border-color: var(--bs-primary) !important;
}

.btn:focus-visible {
  transform: none;
}

/* Keyboard navigation improvements */
*:focus-visible {
  outline: 2px solid var(--bs-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Micro-animations */
.card {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.btn {
  transition: all 0.2s ease;
}

.btn:active {
  transform: scale(0.98);
}

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

.btn.loading .btn-text {
  opacity: 0;
}

.btn.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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