/* 
 * Xonos Framework - Modern Design System
 * A beautiful, accessible, and responsive design system
 */

/* ============================================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ============================================================ */
:root {
  /* Color Palette - Modern Blue/Indigo Theme */
  --color-primary-50: #eef2ff;
  --color-primary-100: #e0e7ff;
  --color-primary-200: #c7d2fe;
  --color-primary-300: #a5b4fc;
  --color-primary-400: #818cf8;
  --color-primary-500: #6366f1;
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;
  --color-primary-800: #3730a3;
  --color-primary-900: #312e81;
  --color-primary-950: #1e1b4b;

  --color-secondary-50: #f8fafc;
  --color-secondary-100: #f1f5f9;
  --color-secondary-200: #e2e8f0;
  --color-secondary-300: #cbd5e1;
  --color-secondary-400: #94a3b8;
  --color-secondary-500: #64748b;
  --color-secondary-600: #475569;
  --color-secondary-700: #334155;
  --color-secondary-800: #1e293b;
  --color-secondary-900: #0f172a;
  --color-secondary-950: #020617;

  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;

  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;

  --color-danger-50: #fef2f2;
  --color-danger-100: #fee2e2;
  --color-danger-500: #ef4444;
  --color-danger-600: #dc2626;

  --color-info-50: #eff6ff;
  --color-info-100: #dbeafe;
  --color-info-500: #3b82f6;
  --color-info-600: #2563eb;

  /* Semantic Colors */
  --color-bg-primary: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #f1f5f9;
  --color-bg-inverse: #0f172a;
  --color-bg-overlay: rgba(15, 23, 42, 0.5);

  --color-text-primary: #0f172a;
  --color-text-secondary: #475569;
  --color-text-tertiary: #94a3b8;
  --color-text-inverse: #f8fafc;
  --color-text-link: #4f46e5;
  --color-text-link-hover: #4338ca;

  --color-border-light: #e2e8f0;
  --color-border-medium: #cbd5e1;
  --color-border-focus: #6366f1;

  /* Spacing Scale */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-5: 1.25rem;   /* 20px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-20: 5rem;     /* 80px */
  --space-24: 6rem;     /* 96px */

  /* Typography */
  --font-family-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  --font-size-6xl: 3.75rem;   /* 60px */

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.1;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --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);
  --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-Index Scale */
  --z-index-dropdown: 100;
  --z-index-sticky: 200;
  --z-index-fixed: 300;
  --z-index-modal-backdrop: 400;
  --z-index-modal: 500;
  --z-index-popover: 600;
  --z-index-tooltip: 700;
  --z-index-toast: 800;

  /* Layout */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 80px;
  --header-height: 72px;
  --container-max: 1400px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-tertiary: #334155;
    --color-bg-inverse: #f8fafc;

    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #64748b;
    --color-text-inverse: #0f172a;
    --color-text-link: #a5b4fc;
    --color-text-link-hover: #c7d2fe;

    --color-border-light: #334155;
    --color-border-medium: #475569;
  }
}

/* ============================================================
   RESET & BASE
   ============================================================ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-secondary);
  min-height: 100vh;
}

img, video, canvas {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--color-text-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-text-link-hover);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

::selection {
  background-color: var(--color-primary-200);
  color: var(--color-primary-900);
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }

.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }

.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-muted { color: var(--color-text-tertiary); }

/* ============================================================
   LAYOUT COMPONENTS
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
.grid-cols-12 { grid-template-columns: repeat(12, 1fr); }

@media (max-width: 1024px) {
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
  .md\:grid-cols-1 { grid-template-columns: 1fr; }
  .md\:grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .sm\:grid-cols-1 { grid-template-columns: 1fr; }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1.5;
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  gap: var(--space-1);
}

.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
}

.btn-icon {
  padding: var(--space-2);
  border-radius: var(--radius-full);
}

.btn-primary {
  background-color: var(--color-primary-600);
  color: white;
  border-color: var(--color-primary-600);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-700);
  border-color: var(--color-primary-700);
  color: white;
}

.btn-secondary {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  border-color: var(--color-border-light);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-border-medium);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--color-border-medium);
  color: var(--color-text-secondary);
}

.btn-outline:hover:not(:disabled) {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
}

.btn-ghost {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.btn-danger {
  background-color: var(--color-danger-600);
  color: white;
  border-color: var(--color-danger-600);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--color-danger-700);
  border-color: var(--color-danger-700);
}

.btn-success {
  background-color: var(--color-success-600);
  color: white;
  border-color: var(--color-success-600);
}

/* ============================================================
   CARDS
   ============================================================ */
.card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-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);
  border-color: var(--color-border-medium);
}

.card-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
  background-color: var(--color-bg-secondary);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

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

.card-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-light);
  background-color: var(--color-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
}

.card-elevated {
  box-shadow: var(--shadow-lg);
}

.card-interactive {
  cursor: pointer;
}

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

/* ============================================================
   FORM ELEMENTS
   ============================================================ */
.form-group {
  margin-bottom: var(--space-5);
}

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

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  line-height: 1.5;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-100);
  outline: none;
}

.form-input::placeholder {
  color: var(--color-text-tertiary);
}

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

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%2364748b' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--space-3) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: var(--space-10);
}

.form-error {
  font-size: var(--font-size-xs);
  color: var(--color-danger-600);
  margin-top: var(--space-1);
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
}

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

.form-check-input {
  width: 1.125rem;
  height: 1.125rem;
  border: 1px solid var(--color-border-medium);
  border-radius: var(--radius-sm);
  appearance: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.form-check-input[type="checkbox"]:checked {
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3cpath fill='none' stroke='%23fff' stroke-linecap='round' stroke-linejoin='round' stroke-width='3' d='M6 10l3 3l6-6'/%3e%3c/svg%3e");
}

.form-check-input[type="radio"]:checked {
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3ccircle cx='10' cy='10' r='4' fill='white'/%3e%3c/svg%3e");
}

.form-check-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  cursor: pointer;
}

.form-switch .form-check-input {
  width: 2.5rem;
  height: 1.25rem;
  border-radius: var(--radius-full);
  background-image: none;
}

.form-switch .form-check-input:checked {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3e%3ccircle cx='15' cy='10' r='4' fill='white'/%3e%3c/svg%3e");
}

/* ============================================================
   BADGES
   ============================================================ */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary { background-color: var(--color-primary-100); color: var(--color-primary-700); }
.badge-secondary { background-color: var(--color-secondary-100); color: var(--color-secondary-700); }
.badge-success { background-color: var(--color-success-100); color: var(--color-success-700); }
.badge-warning { background-color: var(--color-warning-100); color: var(--color-warning-700); }
.badge-danger { background-color: var(--color-danger-100); color: var(--color-danger-700); }
.badge-info { background-color: var(--color-info-100); color: var(--color-info-700); }

/* ============================================================
   TABLES
   ============================================================ */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-light);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.table thead {
  background-color: var(--color-bg-secondary);
}

.table th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  border-bottom: 1px solid var(--color-border-light);
}

.table td {
  padding: var(--space-4);
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: middle;
}

.table tbody tr {
  transition: background-color var(--transition-fast);
}

.table tbody tr:hover {
  background-color: var(--color-bg-secondary);
}

.table tbody tr:last-child td {
  border-bottom: none;
}

/* ============================================================
   ALERTS & TOASTS
   ============================================================ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
}

.alert-icon {
  flex-shrink: 0;
  margin-top: 0.125rem;
}

.alert-content {
  flex: 1;
}

.alert-title {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-1);
}

.alert-message {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.alert-dismiss {
  flex-shrink: 0;
  padding: var(--space-1);
  color: var(--color-text-tertiary);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast);
}

.alert-dismiss:hover {
  color: var(--color-text-primary);
}

.alert-primary { background-color: var(--color-primary-50); border-color: var(--color-primary-200); color: var(--color-primary-900); }
.alert-success { background-color: var(--color-success-50); border-color: var(--color-success-100); color: var(--color-success-800); }
.alert-warning { background-color: var(--color-warning-50); border-color: var(--color-warning-100); color: var(--color-warning-800); }
.alert-danger { background-color: var(--color-danger-50); border-color: var(--color-danger-100); color: var(--color-danger-800); }
.alert-info { background-color: var(--color-info-50); border-color: var(--color-info-100); color: var(--color-info-800); }

/* Toast Container */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-index-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4);
  min-width: 300px;
  max-width: 450px;
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  animation: slideInRight var(--transition-normal) ease-out;
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast-success { border-left: 4px solid var(--color-success-500); }
.toast-danger { border-left: 4px solid var(--color-danger-500); }
.toast-warning { border-left: 4px solid var(--color-warning-500); }
.toast-info { border-left: 4px solid var(--color-info-500); }

/* ============================================================
   MODALS
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--color-bg-overlay);
  z-index: var(--z-index-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--color-bg-primary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  max-width: 32rem;
  width: 100%;
  max-height: 90vh;
  overflow: hidden;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-light);
}

.modal-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

.modal-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  color: var(--color-text-tertiary);
  background: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.modal-close:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-tertiary);
}

.modal-body {
  padding: var(--space-6);
  max-height: 60vh;
  overflow-y: auto;
}

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-light);
  background-color: var(--color-bg-secondary);
}

/* ============================================================
   DROPDOWNS
   ============================================================ */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  z-index: var(--z-index-dropdown);
  min-width: 14rem;
  padding: var(--space-2);
  margin-top: var(--space-1);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
}

.dropdown.active .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  background: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.dropdown-item:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.dropdown-item.danger {
  color: var(--color-danger-600);
}

.dropdown-item.danger:hover {
  background-color: var(--color-danger-50);
  color: var(--color-danger-700);
}

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

/* ============================================================
   TABS
   ============================================================ */
.tabs {
  border-bottom: 1px solid var(--color-border-light);
}

.tabs-list {
  display: flex;
  gap: var(--space-1);
  padding: 0 var(--space-1);
}

.tab {
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  margin-bottom: -1px;
}

.tab:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-tertiary);
}

.tab.active {
  color: var(--color-primary-600);
  border-bottom-color: var(--color-primary-600);
  background-color: transparent;
}

.tab-panel {
  padding: var(--space-6) 0;
  animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   AVATARS
   ============================================================ */
.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: white;
  background-color: var(--color-primary-600);
  border-radius: var(--radius-full);
  overflow: hidden;
  flex-shrink: 0;
}

.avatar-sm { width: 2rem; height: 2rem; font-size: var(--font-size-xs); }
.avatar-lg { width: 3.5rem; height: 3.5rem; font-size: var(--font-size-base); }
.avatar-xl { width: 4.5rem; height: 4.5rem; font-size: var(--font-size-lg); }

.avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-group {
  display: flex;
  align-items: center;
}

.avatar-group .avatar {
  border: 2px solid var(--color-bg-primary);
  margin-left: -0.75rem;
}

.avatar-group .avatar:first-child {
  margin-left: 0;
}

/* ============================================================
   SIDEBAR NAVIGATION
   ============================================================ */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: var(--sidebar-width);
  background-color: var(--color-bg-primary);
  border-right: 1px solid var(--color-border-light);
  z-index: calc(var(--z-index-fixed) - 1);
  display: flex;
  flex-direction: column;
  transition: width var(--transition-normal);
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-4);
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-600);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
}

.sidebar-brand-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
  border-radius: var(--radius-lg);
  color: white;
  flex-shrink: 0;
}

.sidebar.collapsed .sidebar-brand-text {
  display: none;
}

.sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-tertiary);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4);
}

.sidebar-section {
  margin-bottom: var(--space-6);
}

.sidebar-section-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-tertiary);
  padding: var(--space-2) var(--space-3);
  margin-bottom: var(--space-2);
  white-space: nowrap;
}

.sidebar.collapsed .sidebar-section-title {
  display: none;
}

.nav-item {
  margin-bottom: var(--space-1);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-3);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
}

.nav-link.active {
  background-color: var(--color-primary-50);
  color: var(--color-primary-700);
}

.nav-link.active .nav-icon {
  color: var(--color-primary-600);
}

.nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-text-tertiary);
  flex-shrink: 0;
  transition: color var(--transition-fast);
}

.nav-badge {
  margin-left: auto;
  font-size: var(--font-size-xs);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

.sidebar.collapsed .nav-text,
.sidebar.collapsed .nav-badge {
  display: none;
}

.sidebar.collapsed .nav-link {
  justify-content: center;
  padding: var(--space-3);
}

.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
  border-radius: var(--radius-lg);
}

.sidebar.collapsed .user-info {
  justify-content: center;
}

.user-avatar {
  flex-shrink: 0;
}

.user-details {
  min-width: 0;
  overflow: hidden;
}

.user-name {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-role {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar.collapsed .user-details {
  display: none;
}

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  height: var(--header-height);
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border-light);
  z-index: var(--z-index-fixed);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  transition: left var(--transition-normal);
  overflow: visible;
}

.sidebar.collapsed + .header {
  left: var(--sidebar-collapsed-width);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
}

.page-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  overflow: visible;
}

.header-search {
  position: relative;
}

.search-input {
  width: 280px;
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-10);
  font-size: var(--font-size-sm);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.search-input:focus {
  width: 360px;
  background-color: var(--color-bg-primary);
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

.search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-tertiary);
  pointer-events: none;
}

@media (max-width: 1024px) {
  .header {
    left: 0;
  }
  
  .sidebar {
    transform: translateX(-100%);
  }
  
  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-xl);
  }
  
  .sidebar.collapsed {
    transform: translateX(-100%);
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .search-input {
    width: 200px;
  }
  
  .search-input:focus {
    width: 100%;
  }
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.main-content {
  margin-left: var(--sidebar-width);
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
  padding: var(--space-8);
  transition: margin-left var(--transition-normal);
}

.sidebar.collapsed + .header + .main-content {
  margin-left: var(--sidebar-collapsed-width);
}

@media (max-width: 1024px) {
  .main-content {
    margin-left: 0;
    padding: var(--space-6);
  }
}

/* ============================================================
   PAGE HEADER
   ============================================================ */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.page-header-title {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.page-header-title h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.page-header-title p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* ============================================================
   STAT CARDS
   ============================================================ */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-5);
  margin-bottom: var(--space-8);
}

.stat-card {
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-medium);
  transform: translateY(-2px);
}

.stat-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.stat-card-icon {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  font-size: var(--font-size-xl);
}

.stat-card-icon.primary { background-color: var(--color-primary-100); color: var(--color-primary-600); }
.stat-card-icon.success { background-color: var(--color-success-100); color: var(--color-success-600); }
.stat-card-icon.warning { background-color: var(--color-warning-100); color: var(--color-warning-600); }
.stat-card-icon.info { background-color: var(--color-info-100); color: var(--color-info-600); }
.stat-card-icon.danger { background-color: var(--color-danger-100); color: var(--color-danger-600); }

.stat-card-trend {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.stat-card-trend.positive { color: var(--color-success-600); }
.stat-card-trend.negative { color: var(--color-danger-600); }

.stat-card-value {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: 1.1;
  margin-bottom: var(--space-1);
}

.stat-card-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ============================================================
   LANDING PAGE
   ============================================================ */
.landing {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.landing-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  z-index: var(--z-index-fixed);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
}

@media (prefers-color-scheme: dark) {
  .landing-header {
    background-color: rgba(15, 23, 42, 0.9);
  }
}

.landing-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.landing-nav-link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.landing-nav-link:hover {
  color: var(--color-text-primary);
}

.landing-hero {
  flex: 1;
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + var(--space-16)) var(--space-6) var(--space-16);
  max-width: var(--container-max);
  margin: 0 auto;
  width: 100%;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
  width: 100%;
}

@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    text-align: center;
  }
}

.hero-text {
  max-width: 48rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-700);
  background-color: var(--color-primary-100);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-5);
}

.hero-title {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

.hero-title span {
  background: linear-gradient(135deg, var(--color-primary-600), var(--color-primary-400));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 36rem;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-visual {
  position: relative;
}

.hero-visual::before {
  content: '';
  position: absolute;
  inset: -2rem;
  background: radial-gradient(ellipse at center, var(--color-primary-100) 0%, transparent 70%);
  border-radius: 50%;
  z-index: -1;
}

@media (prefers-color-scheme: dark) {
  .hero-visual::before {
    background: radial-gradient(ellipse at center, var(--color-primary-900/30) 0%, transparent 70%);
  }
}

.hero-dashboard {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-2xl);
  border: 1px solid var(--color-border-light);
  overflow: hidden;
  background-color: var(--color-bg-primary);
}

.hero-dashboard-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background-color: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border-light);
}

.hero-dashboard-dots {
  display: flex;
  gap: var(--space-1);
}

.hero-dashboard-dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: var(--radius-full);
}

.hero-dashboard-dot.red { background-color: #ff5f57; }
.hero-dashboard-dot.yellow { background-color: #febc2e; }
.hero-dashboard-dot.green { background-color: #28c840; }

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

.hero-dashboard-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.hero-stat {
  text-align: center;
  padding: var(--space-4);
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
}

.hero-stat-value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.hero-stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-1);
}

/* Features Section */
.features {
  padding: var(--space-20) var(--space-6);
  background-color: var(--color-bg-primary);
  border-top: 1px solid var(--color-border-light);
}

.features-header {
  text-align: center;
  max-width: 42rem;
  margin: 0 auto var(--space-16);
}

.features-title {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-4);
}

.features-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  max-width: var(--container-max);
  margin: 0 auto;
}

.feature-card {
  padding: var(--space-6);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  border-color: var(--color-border-medium);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.feature-icon {
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-700));
  border-radius: var(--radius-lg);
  color: white;
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
}

.feature-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
}

.feature-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* Footer */
.footer {
  padding: var(--space-12) var(--space-6);
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-light);
}

.footer-content {
  max-width: var(--container-max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-8);
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .footer-content {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  max-width: 20rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary-600);
  margin-bottom: var(--space-4);
}

.footer-text {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.footer-column-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--color-primary-600);
}

.footer-bottom {
  max-width: var(--container-max);
  margin: var(--space-8) auto 0;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

.footer-social {
  display: flex;
  gap: var(--space-4);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-text-tertiary);
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  color: var(--color-primary-600);
  background-color: var(--color-primary-100);
}

/* ============================================================
   AUTH PAGES (Login, Register, etc.)
   ============================================================ */
.auth-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-secondary-50);
  padding: var(--space-6);
}

@media (prefers-color-scheme: dark) {
  .auth-page {
    background-color: var(--color-secondary-900);
  }
}

.auth-page .main-content {
  width: 100%;
  max-width: 480px;
}

.auth-page .card {
  box-shadow: var(--shadow-xl);
}

.auth-page .card-body {
  padding: var(--space-8);
}

.auth-page .form-label {
  font-weight: var(--font-weight-medium);
}

.auth-page .form-input,
.auth-page .form-select {
  padding: var(--space-3) var(--space-4);
}

/* ============================================================
   UTILITIES
   ============================================================ */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.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-6 { gap: var(--space-6); }

.w-full { width: 100%; }
.h-full { height: 100%; }

.mt-auto { margin-top: auto; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

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

/* Animation Classes */
.animate-fade-in { animation: fadeIn var(--transition-normal) ease-out; }
.animate-slide-up { animation: slideUp var(--transition-normal) ease-out; }
.animate-slide-down { animation: slideDown var(--transition-normal) ease-out; }
.animate-scale-in { animation: scaleIn var(--transition-fast) ease-out; }

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

.loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    var(--color-bg-tertiary),
    transparent
  );
  animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.spinner {
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  border: 2px solid var(--color-border-light);
  border-top-color: var(--color-primary-600);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

.spinner-lg {
  width: 2.5rem;
  height: 2.5rem;
  border-width: 3px;
}

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

/* Print Styles */
@media print {
  .sidebar, .header, .btn, .alert, .modal, .footer {
    display: none !important;
  }
  
  .main-content {
    margin: 0;
    padding: 0;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid var(--color-border-light);
    break-inside: avoid;
  }
}