/**
 * PDF Accessibility Pro SaaS - Design System v2.0
 * Modernes, innovatives Design-System mit Persönlichkeit
 * "Seriös wie Stripe, innovativ wie Linear"
 * WCAG 2.1 AA konform
 */

/* ========================================================================
   1. MODERN TYPOGRAPHY - GOOGLE FONTS INTEGRATION
   ======================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ========================================================================
   2. CSS CUSTOM PROPERTIES - MODERN DESIGN TOKENS
   ======================================================================== */

:root {
  /* Primary Colors - Königsblau für Autorität */
  --pdf-primary: #1E3A8A;        /* Tiefes Königsblau */
  --pdf-primary-light: #3B82F6;  /* Hellere Variante */
  --pdf-primary-dark: #1E40AF;   /* Dunklere Variante */
  --pdf-primary-50: #EFF6FF;     /* Sehr helle Variante */
  --pdf-primary-100: #DBEAFE;    /* Helle Variante */
  
  /* Secondary Colors - Barrierefreies Grün */
  --pdf-secondary: #047857;      /* WCAG AA konformes Grün (4.67:1) */
  --pdf-secondary-light: #10B981;
  --pdf-secondary-dark: #065F46;
  
  /* Accent Colors - Innovatives Violett */
  --pdf-accent: #6366F1;         /* Innovatives Violett */
  --pdf-accent-light: #8B5CF6;
  --pdf-accent-dark: #4F46E5;
  
  /* Neutral Colors - Grautöne */
  --pdf-gray-50: #F8F9FA;       /* Hintergrund */
  --pdf-gray-100: #E9ECEF;      /* Leichte Borders */
  --pdf-gray-200: #DEE2E6;      /* Mittlere Borders */
  --pdf-gray-300: #CED4DA;      /* Dunkle Borders */
  --pdf-gray-400: #ADB5BD;      /* Disabled Elements */
  --pdf-gray-500: #6C757D;      /* Sekundärer Text */
  --pdf-gray-600: #495057;      /* Primärer Text */
  --pdf-gray-700: #343A40;      /* Überschriften */
  --pdf-gray-800: #212529;      /* Dunkelster Text */
  
  /* Status Colors */
  --pdf-success: #27AE60;       /* Erfolg */
  --pdf-warning: #F39C12;       /* Warnung */
  --pdf-error: #E74C3C;         /* Fehler */
  --pdf-info: #3498DB;          /* Information */
  
  /* Modern Typography */
  --pdf-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --pdf-font-family-headings: 'Poppins', 'Inter', system-ui, sans-serif;
  --pdf-font-family-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  
  --pdf-font-size-xs: 12px;
  --pdf-font-size-sm: 14px;
  --pdf-font-size-base: 16px;
  --pdf-font-size-lg: 18px;
  --pdf-font-size-xl: 20px;
  --pdf-font-size-2xl: 24px;
  --pdf-font-size-3xl: 30px;
  --pdf-font-size-4xl: 36px;
  
  --pdf-font-weight-light: 300;
  --pdf-font-weight-normal: 400;
  --pdf-font-weight-medium: 500;
  --pdf-font-weight-semibold: 600;
  --pdf-font-weight-bold: 700;
  
  --pdf-line-height: 1.6;
  --pdf-line-height-tight: 1.4;
  --pdf-line-height-loose: 1.8;
  
  /* Spacing */
  --pdf-spacing-xs: 0.5rem;     /* 8px */
  --pdf-spacing-sm: 0.75rem;    /* 12px */
  --pdf-spacing-md: 1rem;       /* 16px */
  --pdf-spacing-lg: 1.5rem;     /* 24px */
  --pdf-spacing-xl: 2rem;       /* 32px */
  --pdf-spacing-xxl: 3rem;      /* 48px */
  
  /* Modern Radius - Asymmetrische Variationen */
  --pdf-radius-sm: 4px;
  --pdf-radius-md: 8px;
  --pdf-radius-lg: 12px;
  --pdf-radius-xl: 16px;
  --pdf-radius-2xl: 24px;
  --pdf-radius-full: 9999px;
  
  /* Gradients - Für Premium-Feel */
  --pdf-gradient-primary: linear-gradient(135deg, #1E3A8A 0%, #6366F1 100%);
  --pdf-gradient-secondary: linear-gradient(135deg, #047857 0%, #10B981 100%);
  --pdf-gradient-accent: linear-gradient(135deg, #6366F1 0%, #8B5CF6 100%);
  --pdf-gradient-glass: linear-gradient(135deg, rgba(255,255,255,0.7) 0%, rgba(255,255,255,0.3) 100%);
  
  /* Modern Shadows - Mit farbigen Tinten */
  --pdf-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --pdf-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --pdf-shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.1);
  --pdf-shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);
  --pdf-shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);
  
  /* Colored Shadows für Premium-Effekte */
  --pdf-shadow-primary: 0 8px 25px rgba(30, 58, 138, 0.15);
  --pdf-shadow-secondary: 0 8px 25px rgba(16, 185, 129, 0.15);
  --pdf-shadow-accent: 0 8px 25px rgba(99, 102, 241, 0.15);
  
  /* Smooth Transitions */
  --pdf-transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --pdf-transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --pdf-transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Glassmorphism */
  --pdf-glass-bg: rgba(255, 255, 255, 0.7);
  --pdf-glass-border: rgba(255, 255, 255, 0.2);
  --pdf-glass-blur: blur(10px);
  
  /* Layout */
  --pdf-max-width: 1200px;
  --pdf-container-padding: 2rem;
  --pdf-touch-target: 44px;     /* Minimum Touch Target */
}

/* ========================================================================
   2. RESET & BASE STYLES
   ======================================================================== */

.pdf-reset {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.pdf-reset *,
.pdf-reset *::before,
.pdf-reset *::after {
  box-sizing: inherit;
}

.pdf-base {
  font-family: var(--pdf-font-family);
  font-size: var(--pdf-font-size-base);
  line-height: var(--pdf-line-height);
  color: var(--pdf-gray-700);
  background-color: var(--pdf-gray-50);
}

/* ========================================================================
   3. TYPOGRAPHY SYSTEM
   ======================================================================== */

.pdf-h1, .pdf-h2, .pdf-h3, .pdf-h4, .pdf-h5, .pdf-h6 {
  margin: 0 0 var(--pdf-spacing-md) 0;
  font-family: var(--pdf-font-family-headings);
  font-weight: var(--pdf-font-weight-semibold);
  line-height: var(--pdf-line-height-tight);
  color: var(--pdf-gray-800);
  letter-spacing: -0.025em;
}

.pdf-h1 { 
  font-size: var(--pdf-font-size-4xl);
  font-weight: var(--pdf-font-weight-bold);
  color: var(--pdf-primary); /* Fallback für Barrierefreiheit */
  background: var(--pdf-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Fallback für ältere Browser und Barrierefreiheit */
@supports not (-webkit-background-clip: text) {
  .pdf-h1 {
    color: var(--pdf-primary) !important;
    background: none !important;
  }
}

.pdf-h2 { 
  font-size: var(--pdf-font-size-3xl);
  font-weight: var(--pdf-font-weight-bold);
}

.pdf-h3 { 
  font-size: var(--pdf-font-size-2xl);
  font-weight: var(--pdf-font-weight-semibold);
}

.pdf-h4 { 
  font-size: var(--pdf-font-size-xl);
  font-weight: var(--pdf-font-weight-semibold);
}

.pdf-h5 { 
  font-size: var(--pdf-font-size-lg);
  font-weight: var(--pdf-font-weight-medium);
}

.pdf-h6 { 
  font-size: var(--pdf-font-size-base);
  font-weight: var(--pdf-font-weight-medium);
}

.pdf-text-sm { font-size: var(--pdf-font-size-sm); }
.pdf-text-base { font-size: var(--pdf-font-size-base); }
.pdf-text-lg { font-size: var(--pdf-font-size-lg); }
.pdf-text-xl { font-size: var(--pdf-font-size-xl); }

.pdf-text-primary { color: var(--pdf-primary); }
.pdf-text-secondary { color: var(--pdf-gray-500); }
.pdf-text-success { color: var(--pdf-success); }
.pdf-text-warning { color: var(--pdf-warning); }
.pdf-text-error { color: var(--pdf-error); }

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

.pdf-font-medium { font-weight: 500; }
.pdf-font-semibold { font-weight: 600; }
.pdf-font-bold { font-weight: 700; }

/* ========================================================================
   4. BUTTON SYSTEM
   ======================================================================== */

.pdf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--pdf-touch-target);
  padding: var(--pdf-spacing-sm) var(--pdf-spacing-lg);
  font-family: var(--pdf-font-family);
  font-size: var(--pdf-font-size-base);
  font-weight: var(--pdf-font-weight-medium);
  line-height: 1;
  border: 2px solid transparent;
  border-radius: var(--pdf-radius-lg);
  cursor: pointer;
  transition: all var(--pdf-transition-normal);
  text-decoration: none;
  user-select: none;
  -webkit-user-select: none;
  position: relative;
  overflow: hidden;
  transform: translateY(0);
}

.pdf-btn:focus {
  outline: 2px solid var(--pdf-accent);
  outline-offset: 2px;
}

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

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

.pdf-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: translateY(0);
}

/* Primary Button - Mit Gradient */
.pdf-btn-primary {
  background: var(--pdf-gradient-primary);
  color: white;
  box-shadow: var(--pdf-shadow-primary);
}

.pdf-btn-primary:hover:not(:disabled) {
  background: var(--pdf-gradient-primary);
  filter: brightness(1.1);
  box-shadow: var(--pdf-shadow-xl);
}

.pdf-btn-primary:active:not(:disabled) {
  filter: brightness(0.9);
}

/* Secondary Button - Mit Gradient */
.pdf-btn-secondary {
  background: var(--pdf-gradient-secondary);
  color: white;
  box-shadow: var(--pdf-shadow-secondary);
}

.pdf-btn-secondary:hover:not(:disabled) {
  background: var(--pdf-gradient-secondary);
  filter: brightness(1.1);
  box-shadow: var(--pdf-shadow-xl);
}

.pdf-btn-secondary:active:not(:disabled) {
  filter: brightness(0.9);
}

/* Outline Button */
.pdf-btn-outline {
  background-color: transparent;
  color: var(--pdf-primary);
  border-color: var(--pdf-primary);
}

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

/* Ghost Button */
.pdf-btn-ghost {
  background-color: transparent;
  color: var(--pdf-primary);
}

.pdf-btn-ghost:hover:not(:disabled) {
  background-color: var(--pdf-gray-100);
}

/* Button Sizes */
.pdf-btn-sm {
  min-height: 36px;
  padding: var(--pdf-spacing-xs) var(--pdf-spacing-md);
  font-size: var(--pdf-font-size-sm);
}

.pdf-btn-lg {
  min-height: 52px;
  padding: var(--pdf-spacing-md) var(--pdf-spacing-xl);
  font-size: var(--pdf-font-size-lg);
}

.pdf-btn-full {
  width: 100%;
}

/* ========================================================================
   5. FORM SYSTEM
   ======================================================================== */

.pdf-form-group {
  margin-bottom: var(--pdf-spacing-lg);
}

.pdf-label {
  display: block;
  margin-bottom: var(--pdf-spacing-xs);
  font-weight: 500;
  color: var(--pdf-gray-700);
}

.pdf-label-required::after {
  content: ' *';
  color: var(--pdf-error);
}

.pdf-input {
  display: block;
  width: 100%;
  min-height: var(--pdf-touch-target);
  padding: var(--pdf-spacing-sm) var(--pdf-spacing-md);
  font-family: var(--pdf-font-family);
  font-size: var(--pdf-font-size-base);
  line-height: var(--pdf-line-height);
  color: var(--pdf-gray-700);
  background-color: white;
  border: 2px solid var(--pdf-gray-200);
  border-radius: var(--pdf-radius-lg);
  transition: all var(--pdf-transition-normal);
  position: relative;
}

.pdf-input:focus {
  outline: none;
  border-color: var(--pdf-accent);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
  transform: translateY(-1px);
}

.pdf-input:hover {
  border-color: var(--pdf-gray-300);
}

.pdf-input::placeholder {
  color: var(--pdf-gray-400);
}

.pdf-input:disabled {
  background-color: var(--pdf-gray-100);
  color: var(--pdf-gray-400);
  cursor: not-allowed;
}

.pdf-input-error {
  border-color: var(--pdf-error);
}

.pdf-input-error:focus {
  box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

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

.pdf-select {
  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='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right var(--pdf-spacing-sm) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: var(--pdf-spacing-xl);
}

.pdf-checkbox,
.pdf-radio {
  width: 1.25rem;
  height: 1.25rem;
  margin-right: var(--pdf-spacing-sm);
  vertical-align: middle;
}

.pdf-form-help {
  margin-top: var(--pdf-spacing-xs);
  font-size: var(--pdf-font-size-sm);
  color: var(--pdf-gray-500);
}

.pdf-form-error {
  margin-top: var(--pdf-spacing-xs);
  font-size: var(--pdf-font-size-sm);
  color: var(--pdf-error);
}

/* ========================================================================
   6. CARD SYSTEM
   ======================================================================== */

.pdf-card {
  background-color: white;
  border-radius: var(--pdf-radius-xl);
  box-shadow: var(--pdf-shadow-md);
  border: 1px solid var(--pdf-gray-200);
  overflow: hidden;
  transition: all var(--pdf-transition-normal);
  transform: translateY(0);
}

.pdf-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--pdf-shadow-xl);
}

.pdf-card-glass {
  background: var(--pdf-glass-bg);
  backdrop-filter: var(--pdf-glass-blur);
  border: 1px solid var(--pdf-glass-border);
}

.pdf-card-header {
  padding: var(--pdf-spacing-lg) var(--pdf-spacing-xl);
  border-bottom: 1px solid var(--pdf-gray-200);
  background-color: var(--pdf-gray-50);
}

.pdf-card-title {
  margin: 0;
  font-size: var(--pdf-font-size-lg);
  font-weight: 600;
  color: var(--pdf-gray-800);
}

.pdf-card-body {
  padding: var(--pdf-spacing-xl);
}

.pdf-card-footer {
  padding: var(--pdf-spacing-lg) var(--pdf-spacing-xl);
  border-top: 1px solid var(--pdf-gray-200);
  background-color: var(--pdf-gray-50);
}

.pdf-card-compact .pdf-card-body {
  padding: var(--pdf-spacing-lg);
}

.pdf-card-highlight {
  border-left: 4px solid var(--pdf-accent);
}

.pdf-card-success {
  border-left: 4px solid var(--pdf-success);
}

.pdf-card-warning {
  border-left: 4px solid var(--pdf-warning);
}

.pdf-card-error {
  border-left: 4px solid var(--pdf-error);
}

/* ========================================================================
   7. ALERT SYSTEM
   ======================================================================== */

.pdf-alert {
  padding: var(--pdf-spacing-md) var(--pdf-spacing-lg);
  border-radius: var(--pdf-radius-md);
  border: 1px solid transparent;
  margin-bottom: var(--pdf-spacing-lg);
}

.pdf-alert-success {
  background-color: #d4edda;
  border-color: #c3e6cb;
  color: #155724;
}

.pdf-alert-warning {
  background-color: #fff3cd;
  border-color: #ffeaa7;
  color: #856404;
}

.pdf-alert-error {
  background-color: #f8d7da;
  border-color: #f5c6cb;
  color: #721c24;
}

.pdf-alert-info {
  background-color: #d1ecf1;
  border-color: #bee5eb;
  color: #0c5460;
}

/* ========================================================================
   8. LAYOUT UTILITIES
   ======================================================================== */

.pdf-container {
  max-width: var(--pdf-max-width);
  margin: 0 auto;
  padding: 0 var(--pdf-container-padding);
}

.pdf-grid {
  display: grid;
  gap: var(--pdf-spacing-lg);
}

.pdf-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.pdf-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.pdf-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.pdf-flex {
  display: flex;
}

.pdf-flex-col {
  flex-direction: column;
}

.pdf-flex-wrap {
  flex-wrap: wrap;
}

.pdf-items-center {
  align-items: center;
}

.pdf-items-start {
  align-items: flex-start;
}

.pdf-items-end {
  align-items: flex-end;
}

.pdf-justify-center {
  justify-content: center;
}

.pdf-justify-between {
  justify-content: space-between;
}

.pdf-justify-start {
  justify-content: flex-start;
}

.pdf-justify-end {
  justify-content: flex-end;
}

.pdf-gap-sm { gap: var(--pdf-spacing-sm); }
.pdf-gap-md { gap: var(--pdf-spacing-md); }
.pdf-gap-lg { gap: var(--pdf-spacing-lg); }
.pdf-gap-xl { gap: var(--pdf-spacing-xl); }

/* ========================================================================
   9. SPACING UTILITIES
   ======================================================================== */

.pdf-p-0 { padding: 0; }
.pdf-p-xs { padding: var(--pdf-spacing-xs); }
.pdf-p-sm { padding: var(--pdf-spacing-sm); }
.pdf-p-md { padding: var(--pdf-spacing-md); }
.pdf-p-lg { padding: var(--pdf-spacing-lg); }
.pdf-p-xl { padding: var(--pdf-spacing-xl); }
.pdf-p-xxl { padding: var(--pdf-spacing-xxl); }

.pdf-pt-0 { padding-top: 0; }
.pdf-pt-xs { padding-top: var(--pdf-spacing-xs); }
.pdf-pt-sm { padding-top: var(--pdf-spacing-sm); }
.pdf-pt-md { padding-top: var(--pdf-spacing-md); }
.pdf-pt-lg { padding-top: var(--pdf-spacing-lg); }
.pdf-pt-xl { padding-top: var(--pdf-spacing-xl); }
.pdf-pt-xxl { padding-top: var(--pdf-spacing-xxl); }

.pdf-pb-0 { padding-bottom: 0; }
.pdf-pb-xs { padding-bottom: var(--pdf-spacing-xs); }
.pdf-pb-sm { padding-bottom: var(--pdf-spacing-sm); }
.pdf-pb-md { padding-bottom: var(--pdf-spacing-md); }
.pdf-pb-lg { padding-bottom: var(--pdf-spacing-lg); }
.pdf-pb-xl { padding-bottom: var(--pdf-spacing-xl); }
.pdf-pb-xxl { padding-bottom: var(--pdf-spacing-xxl); }

.pdf-pl-0 { padding-left: 0; }
.pdf-pl-xs { padding-left: var(--pdf-spacing-xs); }
.pdf-pl-sm { padding-left: var(--pdf-spacing-sm); }
.pdf-pl-md { padding-left: var(--pdf-spacing-md); }
.pdf-pl-lg { padding-left: var(--pdf-spacing-lg); }
.pdf-pl-xl { padding-left: var(--pdf-spacing-xl); }
.pdf-pl-xxl { padding-left: var(--pdf-spacing-xxl); }

.pdf-pr-0 { padding-right: 0; }
.pdf-pr-xs { padding-right: var(--pdf-spacing-xs); }
.pdf-pr-sm { padding-right: var(--pdf-spacing-sm); }
.pdf-pr-md { padding-right: var(--pdf-spacing-md); }
.pdf-pr-lg { padding-right: var(--pdf-spacing-lg); }
.pdf-pr-xl { padding-right: var(--pdf-spacing-xl); }
.pdf-pr-xxl { padding-right: var(--pdf-spacing-xxl); }

.pdf-m-0 { margin: 0; }
.pdf-m-xs { margin: var(--pdf-spacing-xs); }
.pdf-m-sm { margin: var(--pdf-spacing-sm); }
.pdf-m-md { margin: var(--pdf-spacing-md); }
.pdf-m-lg { margin: var(--pdf-spacing-lg); }
.pdf-m-xl { margin: var(--pdf-spacing-xl); }
.pdf-m-xxl { margin: var(--pdf-spacing-xxl); }

.pdf-mt-0 { margin-top: 0; }
.pdf-mt-xs { margin-top: var(--pdf-spacing-xs); }
.pdf-mt-sm { margin-top: var(--pdf-spacing-sm); }
.pdf-mt-md { margin-top: var(--pdf-spacing-md); }
.pdf-mt-lg { margin-top: var(--pdf-spacing-lg); }
.pdf-mt-xl { margin-top: var(--pdf-spacing-xl); }
.pdf-mt-xxl { margin-top: var(--pdf-spacing-xxl); }

.pdf-mb-0 { margin-bottom: 0; }
.pdf-mb-xs { margin-bottom: var(--pdf-spacing-xs); }
.pdf-mb-sm { margin-bottom: var(--pdf-spacing-sm); }
.pdf-mb-md { margin-bottom: var(--pdf-spacing-md); }
.pdf-mb-lg { margin-bottom: var(--pdf-spacing-lg); }
.pdf-mb-xl { margin-bottom: var(--pdf-spacing-xl); }
.pdf-mb-xxl { margin-bottom: var(--pdf-spacing-xxl); }

.pdf-ml-0 { margin-left: 0; }
.pdf-ml-xs { margin-left: var(--pdf-spacing-xs); }
.pdf-ml-sm { margin-left: var(--pdf-spacing-sm); }
.pdf-ml-md { margin-left: var(--pdf-spacing-md); }
.pdf-ml-lg { margin-left: var(--pdf-spacing-lg); }
.pdf-ml-xl { margin-left: var(--pdf-spacing-xl); }
.pdf-ml-xxl { margin-left: var(--pdf-spacing-xxl); }

.pdf-mr-0 { margin-right: 0; }
.pdf-mr-xs { margin-right: var(--pdf-spacing-xs); }
.pdf-mr-sm { margin-right: var(--pdf-spacing-sm); }
.pdf-mr-md { margin-right: var(--pdf-spacing-md); }
.pdf-mr-lg { margin-right: var(--pdf-spacing-lg); }
.pdf-mr-xl { margin-right: var(--pdf-spacing-xl); }
.pdf-mr-xxl { margin-right: var(--pdf-spacing-xxl); }

/* ========================================================================
   10. ACCESSIBILITY UTILITIES
   ======================================================================== */

.pdf-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;
}

.pdf-focus-visible:focus {
  outline: 2px solid var(--pdf-accent);
  outline-offset: 2px;
}

.pdf-skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--pdf-primary);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: var(--pdf-radius-md);
  z-index: 1000;
}

.pdf-skip-link:focus {
  top: 6px;
}

/* ========================================================================
   11. RESPONSIVE UTILITIES
   ======================================================================== */

@media (max-width: 768px) {
  .pdf-grid-2,
  .pdf-grid-3,
  .pdf-grid-4 {
    grid-template-columns: 1fr;
  }
  
  .pdf-container {
    padding: 0 var(--pdf-spacing-md);
  }
  
  .pdf-card-body {
    padding: var(--pdf-spacing-lg);
  }
  
  .pdf-btn-lg {
    min-height: var(--pdf-touch-target);
    padding: var(--pdf-spacing-sm) var(--pdf-spacing-lg);
    font-size: var(--pdf-font-size-base);
  }
}

/* ========================================================================
   12. PRINT STYLES
   ======================================================================== */

@media print {
  .pdf-card {
    box-shadow: none;
    border: 1px solid var(--pdf-gray-300);
  }
  
  .pdf-btn {
    background: transparent !important;
    color: var(--pdf-gray-700) !important;
    border: 1px solid var(--pdf-gray-300) !important;
  }
}

/* ========================================================================
   13. PREMIUM COMPONENTS IMPORT
   ======================================================================== */

/* Import Premium Components */
@import url('pdf-premium-components.css');

/* ========================================================================
   14. DARK MODE SUPPORT (Optional)
   ======================================================================== */

@media (prefers-color-scheme: dark) {
  .pdf-dark-mode {
    --pdf-gray-50: #1A1A1A;
    --pdf-gray-100: #2D2D2D;
    --pdf-gray-200: #404040;
    --pdf-gray-300: #525252;
    --pdf-gray-400: #737373;
    --pdf-gray-500: #A3A3A3;
    --pdf-gray-600: #D4D4D4;
    --pdf-gray-700: #E5E5E5;
    --pdf-gray-800: #F5F5F5;
  }
  
  .pdf-dark-mode .pdf-card {
    background-color: var(--pdf-gray-100);
    border-color: var(--pdf-gray-300);
  }
  
  .pdf-dark-mode .pdf-input {
    background-color: var(--pdf-gray-100);
    border-color: var(--pdf-gray-300);
    color: var(--pdf-gray-700);
  }
}