/* Schmidt-Kids-Bank Design System */
/* Global CSS Variables & Styles */

:root {
  /* Light Theme Colors */
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;

  --success-50: #f0fdf4;
  --success-100: #dcfce7;
  --success-200: #bbf7d0;
  --success-300: #86efac;
  --success-400: #4ade80;
  --success-500: #22c55e;
  --success-600: #16a34a;
  --success-700: #15803d;
  --success-800: #166534;
  --success-900: #14532d;

  --warning-50: #fffbeb;
  --warning-100: #fef3c7;
  --warning-200: #fde68a;
  --warning-300: #fcd34d;
  --warning-400: #fbbf24;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  --warning-700: #b45309;
  --warning-800: #92400e;
  --warning-900: #78350f;

  --danger-50: #fef2f2;
  --danger-100: #fee2e2;
  --danger-200: #fecaca;
  --danger-300: #fca5a5;
  --danger-400: #f87171;
  --danger-500: #ef4444;
  --danger-600: #dc2626;
  --danger-700: #b91c1c;
  --danger-800: #991b1b;
  --danger-900: #7f1d1d;

  /* Neutral Colors */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;

  /* Semantic Colors - Light Mode */
  --bg-primary: #ffffff;
  --bg-secondary: var(--gray-50);
  --bg-tertiary: var(--gray-100);
  --bg-accent: var(--primary-50);
  
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-600);
  --text-tertiary: var(--gray-500);
  --text-accent: var(--primary-600);
  
  --border-light: var(--gray-200);
  --border-medium: var(--gray-300);
  --border-strong: var(--gray-400);
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  
  /* Animation Variables */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
  --transition-slow: 500ms ease-in-out;
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 50%;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
}

/* Dark Theme Colors */
[data-theme="dark"] {
  --bg-primary: var(--gray-900);
  --bg-secondary: var(--gray-800);
  --bg-tertiary: var(--gray-700);
  --bg-accent: var(--primary-900);
  
  --text-primary: var(--gray-50);
  --text-secondary: var(--gray-300);
  --text-tertiary: var(--gray-400);
  --text-accent: var(--primary-400);
  
  --border-light: var(--gray-700);
  --border-medium: var(--gray-600);
  --border-strong: var(--gray-500);
  
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.4), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.4), 0 8px 10px -6px rgb(0 0 0 / 0.3);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.5);
}

/* Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* Navigation System */
.header {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  padding: 0 var(--space-6);
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: 20px;
  color: var(--primary-500);
  text-decoration: none;
}

.brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  overflow: hidden;
  white-space: nowrap;
  background: transparent;
  border: 1px solid transparent;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-accent);
  width: auto;
  min-width: 48px;
  padding-right: var(--space-4);
  border-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}

.nav-item.active {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  box-shadow: var(--shadow-md);
}

.nav-item.active:hover {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: white;
}

.nav-icon {
  font-size: 20px;
  min-width: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 var(--space-3);
}

.nav-text {
  font-size: 14px;
  font-weight: 500;
  opacity: 0;
  transform: translateX(-10px);
  transition: all var(--transition-fast);
  max-width: 0;
  overflow: hidden;
  margin-left: var(--space-2);
}

.nav-item:hover .nav-text {
  opacity: 1;
  transform: translateX(0);
  max-width: 150px;
}

.nav-divider {
  width: 1px;
  height: 32px;
  background: var(--border-light);
  margin: 0 var(--space-2);
}

.user-section {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-light);
  background: var(--bg-secondary);
  color: var(--text-secondary);
  border-radius: var(--radius-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background: var(--primary-500);
  color: white;
  border-color: var(--primary-500);
  box-shadow: var(--shadow-sm);
}

.user-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.user-avatar:hover {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

/* Loading States */
.loading {
  position: relative;
  overflow: hidden;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  animation: loading-shimmer 1.5s infinite;
}

[data-theme="dark"] .loading::after {
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
}

@keyframes loading-shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border: none;
  border-radius: var(--radius-lg);
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  user-select: none;
  
  /* Primary Button */
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Button Variants */
.btn-secondary {
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: linear-gradient(135deg, var(--gray-200), var(--gray-300));
}

[data-theme="dark"] .btn-secondary {
  background: linear-gradient(135deg, var(--gray-700), var(--gray-600));
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

[data-theme="dark"] .btn-secondary:hover {
  background: linear-gradient(135deg, var(--gray-600), var(--gray-500));
}

.btn-success {
  background: linear-gradient(135deg, var(--success-500), var(--success-600));
  color: white;
}

.btn-success:hover {
  background: linear-gradient(135deg, var(--success-600), var(--success-700));
}

.btn-warning {
  background: linear-gradient(135deg, var(--warning-500), var(--warning-600));
  color: white;
}

.btn-warning:hover {
  background: linear-gradient(135deg, var(--warning-600), var(--warning-700));
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger-500), var(--danger-600));
  color: white;
}

.btn-danger:hover {
  background: linear-gradient(135deg, var(--danger-600), var(--danger-700));
}

/* Button Sizes */
.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: 12px;
  border-radius: var(--radius-md);
}

.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: 16px;
  border-radius: var(--radius-xl);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  border: 1px solid var(--border-light);
}

.btn-icon:hover {
  background: var(--bg-accent);
  color: var(--text-accent);
  border-color: var(--primary-200);
}

/* Card System */
.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  overflow: hidden;
}

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

.card-header {
  padding: var(--space-6);
  border-bottom: 1px solid var(--border-light);
}

.card-body {
  padding: var(--space-6);
}

.card-footer {
  padding: var(--space-6);
  border-top: 1px solid var(--border-light);
  background: var(--bg-secondary);
}

/* Form Controls */
.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.form-control {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-100);
}

[data-theme="dark"] .form-control:focus {
  box-shadow: 0 0 0 3px var(--primary-900);
}

.form-control:disabled {
  background: var(--bg-tertiary);
  color: var(--text-tertiary);
  cursor: not-allowed;
}

/* Alert System */
.alert {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  font-size: 14px;
  margin-bottom: var(--space-5);
  border: 1px solid;
  position: relative;
  animation: alert-slide-in 0.3s ease-out;
}

@keyframes alert-slide-in {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.alert-success {
  background: var(--success-50);
  color: var(--success-800);
  border-color: var(--success-200);
}

.alert-warning {
  background: var(--warning-50);
  color: var(--warning-800);
  border-color: var(--warning-200);
}

.alert-danger {
  background: var(--danger-50);
  color: var(--danger-800);
  border-color: var(--danger-200);
}

[data-theme="dark"] .alert-success {
  background: var(--success-900);
  color: var(--success-200);
  border-color: var(--success-700);
}

[data-theme="dark"] .alert-warning {
  background: var(--warning-900);
  color: var(--warning-200);
  border-color: var(--warning-700);
}

[data-theme="dark"] .alert-danger {
  background: var(--danger-900);
  color: var(--danger-200);
  border-color: var(--danger-700);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-flex { display: flex; }
.d-grid { display: grid; }
.d-none { display: none; }
.d-block { display: block; }

.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }

.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }

.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }

.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }

.m-0 { margin: 0; }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-5 { margin: var(--space-5); }
.m-6 { margin: var(--space-6); }

.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }

.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }

/* Responsive Grid */
.grid-1 { grid-template-columns: 1fr; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

/* Responsive Navigation */
@media (max-width: 768px) {
  .header {
    padding: 0 var(--space-4);
  }
  
  .nav-container {
    gap: var(--space-1);
  }
  
  .nav-item {
    width: 44px;
    height: 44px;
  }
  
  .nav-item:hover {
    width: 44px;
    padding-right: 0;
  }
  
  .nav-item:hover .nav-text {
    opacity: 0;
    max-width: 0;
  }
  
  .brand-text {
    display: none;
  }
  
  .nav-divider {
    margin: 0 var(--space-1);
  }
  
  .user-section {
    gap: var(--space-2);
  }
  
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .btn {
    padding: var(--space-4) var(--space-5);
  }
  
  .card-header,
  .card-body,
  .card-footer {
    padding: var(--space-4);
  }
}

/* Navigation Animation on Load */
.nav-item {
  animation: nav-slide-up 0.4s ease forwards;
}

.nav-item:nth-child(1) { animation-delay: 0.1s; opacity: 0; }
.nav-item:nth-child(2) { animation-delay: 0.15s; opacity: 0; }
.nav-item:nth-child(3) { animation-delay: 0.2s; opacity: 0; }
.nav-item:nth-child(4) { animation-delay: 0.25s; opacity: 0; }
.nav-item:nth-child(5) { animation-delay: 0.3s; opacity: 0; }
.nav-item:nth-child(6) { animation-delay: 0.35s; opacity: 0; }
.nav-item:nth-child(7) { animation-delay: 0.4s; opacity: 0; }

@keyframes nav-slide-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Animations for better UX */
.fade-in {
  animation: fade-in 0.3s ease-out;
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

.slide-up {
  animation: slide-up 0.3s ease-out;
}

@keyframes slide-up {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scale-in {
  animation: scale-in 0.2s ease-out;
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Focus states for accessibility */
.btn:focus,
.form-control:focus,
.btn-icon:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.nav-item:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

.theme-toggle:focus,
.user-avatar:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}