/**
 * Base CSS for Central Poland Business Platform
 * Professional, Clean, Modern, Corporate Design
 * Color Palette: Blues and Grays with structured layout
 */

/* ===================================
   CSS VARIABLES
   =================================== */
:root {
  /* Color Palette - Corporate Blues & Grays */
  --color-primary: #1e5a96;
  --color-primary-light: #2770b8;
  --color-primary-dark: #144170;
  --color-secondary: #4a90c9;
  --color-accent: #0066cc;
  
  /* Neutral Grays */
  --color-gray-50: #f8f9fb;
  --color-gray-100: #f1f3f6;
  --color-gray-200: #e4e7eb;
  --color-gray-300: #cbd0d8;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Semantic Colors */
  --color-background: #ffffff;
  --color-background-alt: var(--color-gray-50);
  --color-surface: #ffffff;
  --color-text: var(--color-gray-800);
  --color-text-secondary: var(--color-gray-600);
  --color-text-muted: var(--color-gray-500);
  --color-success: #059669;
  --color-warning: #d97706;
  --color-danger: #dc2626;
  --color-info: var(--color-secondary);
  
  /* Border Colors */
  --color-border: var(--color-gray-200);
  --color-border-light: var(--color-gray-100);
  --color-border-dark: var(--color-gray-300);
  
  /* Typography */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Courier New', monospace;
  
  /* Font Sizes */
  --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 */
  
  /* Line Heights */
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;
  
  /* Font Weights */
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing Scale */
  --spacing-0: 0;
  --spacing-1: 0.25rem;   /* 4px */
  --spacing-2: 0.5rem;    /* 8px */
  --spacing-3: 0.75rem;   /* 12px */
  --spacing-4: 1rem;      /* 16px */
  --spacing-5: 1.25rem;   /* 20px */
  --spacing-6: 1.5rem;    /* 24px */
  --spacing-8: 2rem;      /* 32px */
  --spacing-10: 2.5rem;   /* 40px */
  --spacing-12: 3rem;     /* 48px */
  --spacing-16: 4rem;     /* 64px */
  --spacing-20: 5rem;     /* 80px */
  --spacing-24: 6rem;     /* 96px */
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;  /* 2px */
  --radius-base: 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-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Transitions */
  --transition-fast: 150ms;
  --transition-base: 200ms;
  --transition-slow: 300ms;
  --transition-slower: 500ms;
  --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index Scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Container */
  --container-max-width: 1280px;
  --container-padding: var(--spacing-4);
  
  /* Breakpoints (for reference) */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* ===================================
   RESET & NORMALIZE
   =================================== */

/* Box sizing reset */
*,
*::before,
*::after {
  box-sizing: border-box;
}

/* Remove default margins and paddings */
* {
  margin: 0;
  padding: 0;
}

/* HTML & Body */
html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  min-height: 100vh;
  line-height: var(--line-height-normal);
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  overflow-x: hidden;
}

@media (max-width: 625px) {
  body {
    overflow-x: hidden !important;
  }
}

/* Responsive images and media */
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

@media (max-width: 625px) {
  img,
  picture,
  video,
  canvas,
  svg {
    max-width: 100%;
    width: 100%;
    height: auto;
  }
}

/* Remove list styles */
ul,
ol {
  list-style: none;
}

/* Form elements inherit font */
input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

/* Remove button styles */
button {
  background: none;
  border: none;
  cursor: pointer;
}

/* Prevent text overflow */
p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

/* Table reset */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* ===================================
   BASE TYPOGRAPHY
   =================================== */

/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-4);
}

h1 {
  font-size: var(--font-size-4xl);
  letter-spacing: -0.02em;
}

h2 {
  font-size: var(--font-size-3xl);
  letter-spacing: -0.01em;
}

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

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

h5 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

h6 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (max-width: 768px) {
  h1 { font-size: var(--font-size-3xl); }
  h2 { font-size: var(--font-size-2xl); }
  h3 { font-size: var(--font-size-xl); }
  h4 { font-size: var(--font-size-lg); }
}

/* Paragraphs */
p {
  margin-bottom: var(--spacing-4);
  line-height: var(--line-height-relaxed);
  }

p:last-child {
  margin-bottom: 0;
}

/* Links */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base) var(--transition-timing);
}

a:hover {
  color: var(--color-primary-light);
}

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

/* Strong & Emphasis */
strong,
b {
  font-weight: var(--font-weight-semibold);
}

em,
i {
  font-style: italic;
}

/* Small text */
small {
  font-size: var(--font-size-sm);
}

/* Code */
code,
kbd,
samp,
pre {
  font-family: var(--font-family-mono);
  font-size: 0.9em;
}

code {
  padding: 0.125rem 0.25rem;
  background-color: var(--color-gray-100);
  border-radius: var(--radius-sm);
  color: var(--color-gray-800);
}

pre {
  padding: var(--spacing-4);
  background-color: var(--color-gray-900);
  color: var(--color-gray-100);
  border-radius: var(--radius-md);
  overflow-x: auto;
  line-height: var(--line-height-relaxed);
}

pre code {
  padding: 0;
  background: none;
  color: inherit;
}

/* Blockquote */
blockquote {
  padding-left: var(--spacing-6);
  border-left: 4px solid var(--color-primary);
  font-style: italic;
  color: var(--color-text-secondary);
  margin: var(--spacing-6) 0;
}

/* Horizontal rule */
hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-8) 0;
}

/* ===================================
   LAYOUT UTILITIES
   =================================== */

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

@media (max-width: 625px) {
  .container {
    max-width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
    overflow-x: hidden;
  }
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--spacing-6);
    padding-right: var(--spacing-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--spacing-8);
    padding-right: var(--spacing-8);
  }
}

.container-fluid {
  width: 100%;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

@media (max-width: 625px) {
  .container-fluid {
    max-width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
    overflow-x: hidden;
  }
}

/* Section spacing */
.section {
  padding-top: var(--spacing-16);
  padding-bottom: var(--spacing-16);
}

@media (max-width: 768px) {
  .section {
    padding-top: var(--spacing-12);
    padding-bottom: var(--spacing-12);
  }
}

/* Flex utilities */
.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.flex-row {
  flex-direction: row;
}

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

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

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

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

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

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

.items-stretch {
  align-items: stretch;
}

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

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

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

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

.justify-around {
  justify-content: space-around;
}

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

/* Grid utilities */
.grid {
  display: grid;
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 625px) {
  .grid {
    width: 100%;
    max-width: 100%;
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(1, minmax(0, 1fr));
    gap: var(--spacing-4);
  }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Display utilities */
.hidden {
  display: none;
}

.block {
  display: block;
}

.inline-block {
  display: inline-block;
}

@media (max-width: 768px) {
  .md\:hidden { display: none; }
  .md\:block { display: block; }
}

/* Text utilities */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.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); }

.font-normal { font-weight: var(--font-weight-normal); }
.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-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-white { color: #ffffff; }

/* Spacing utilities */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.p-2 { padding: var(--spacing-2); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

/* Width utilities */
.w-full { width: 100%; }
.w-auto { width: auto; }
.max-w-full { max-width: 100%; }

/* Screen reader only */
.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;
}

/* ===================================
   COMPONENT STYLES
   =================================== */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base) var(--transition-timing);
  user-select: none;
}

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

.btn:disabled,
.btn.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Button variants */
.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: #ffffff;
}

.btn-primary:active {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn-secondary {
  background-color: var(--color-gray-100);
  color: var(--color-gray-800);
  border-color: var(--color-gray-300);
}

.btn-secondary:hover {
  background-color: var(--color-gray-200);
  border-color: var(--color-gray-400);
}

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

.btn-outline:hover {
  background-color: var(--color-primary);
  color: #ffffff;
}

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

.btn-ghost:hover {
  background-color: var(--color-gray-100);
}

/* Button sizes */
.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
}

/* Mobile button fixes */
@media (max-width: 625px) {
  .btn {
    max-width: 100%;
    white-space: normal;
    word-wrap: break-word;
    overflow-wrap: break-word;
    padding: var(--spacing-3) var(--spacing-4);
  }
  
  .btn-sm {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: 0.8rem;
  }
  
  .btn-lg {
    padding: var(--spacing-3) var(--spacing-5);
    font-size: var(--font-size-base);
  }
}

/* Input fields */
.input {
  display: block;
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-base) var(--transition-timing),
              box-shadow var(--transition-base) var(--transition-timing);
}

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

.input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 90, 150, 0.1);
}

.input:disabled {
  background-color: var(--color-gray-100);
  cursor: not-allowed;
  opacity: 0.6;
}

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

.input.error:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

/* Textarea */
textarea.input {
  resize: vertical;
  min-height: 100px;
}

@media (max-width: 625px) {
  .input {
    max-width: 100%;
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3);
    font-size: 0.95rem;
  }
  
  textarea.input {
    min-height: 80px;
  }
}

/* Select */
select.input {
  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='%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(--spacing-3) center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: var(--spacing-10);
}

/* Label */
.label {
  display: block;
  margin-bottom: var(--spacing-2);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-700);
}

/* Form group */
.form-group {
  margin-bottom: var(--spacing-6);
}

/* Cards */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base) var(--transition-timing),
              transform var(--transition-base) var(--transition-timing);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  padding-bottom: var(--spacing-4);
  margin-bottom: var(--spacing-4);
  border-bottom: 1px solid var(--color-border-light);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-900);
  margin: 0;
}

.card-body {
  color: var(--color-text);
}

.card-footer {
  padding-top: var(--spacing-4);
  margin-top: var(--spacing-4);
  border-top: 1px solid var(--color-border-light);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-primary {
  background-color: rgba(30, 90, 150, 0.1);
  color: var(--color-primary);
}

.badge-success {
  background-color: rgba(5, 150, 105, 0.1);
  color: var(--color-success);
}

.badge-warning {
  background-color: rgba(217, 119, 6, 0.1);
  color: var(--color-warning);
}

.badge-danger {
  background-color: rgba(220, 38, 38, 0.1);
  color: var(--color-danger);
}

.badge-info {
  background-color: rgba(74, 144, 201, 0.1);
  color: var(--color-info);
}

/* Alert */
.alert {
  padding: var(--spacing-4) var(--spacing-6);
  border-radius: var(--radius-md);
  border-left: 4px solid;
  margin-bottom: var(--spacing-4);
}

.alert-info {
  background-color: rgba(74, 144, 201, 0.1);
  border-color: var(--color-info);
  color: var(--color-gray-800);
}

.alert-success {
  background-color: rgba(5, 150, 105, 0.1);
  border-color: var(--color-success);
  color: var(--color-gray-800);
}

.alert-warning {
  background-color: rgba(217, 119, 6, 0.1);
  border-color: var(--color-warning);
  color: var(--color-gray-800);
}

.alert-danger {
  background-color: rgba(220, 38, 38, 0.1);
  border-color: var(--color-danger);
  color: var(--color-gray-800);
}

/* Divider */
.divider {
  height: 1px;
  background-color: var(--color-border);
  margin: var(--spacing-6) 0;
}

/* Loading spinner */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner {
  display: inline-block;
  width: 1.5rem;
  height: 1.5rem;
  border: 2px solid var(--color-gray-200);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation: none;
    border-top-color: var(--color-gray-200);
  }
}

/* ===================================
   ACCESSIBILITY
   =================================== */

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Remove focus for mouse users */
*:focus:not(:focus-visible) {
  outline: none;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* Skip to main content link */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-2) var(--spacing-4);
  text-decoration: none;
  z-index: 9999;
}

.skip-to-main:focus {
  top: 0;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .btn,
  .input,
  .card {
    border-width: 2px;
  }
}

/* ===================================
   UTILITY CLASSES
   =================================== */

/* Background colors */
.bg-white { background-color: #ffffff; }
.bg-primary { background-color: var(--color-primary); }
.bg-secondary { background-color: var(--color-secondary); }
.bg-gray-50 { background-color: var(--color-gray-50); }
.bg-gray-100 { background-color: var(--color-gray-100); }

/* Border utilities */
.border { border: 1px solid var(--color-border); }
.border-t { border-top: 1px solid var(--color-border); }
.border-b { border-bottom: 1px solid var(--color-border); }
.border-l { border-left: 1px solid var(--color-border); }
.border-r { border-right: 1px solid var(--color-border); }

/* Border radius */
.rounded { border-radius: var(--radius-base); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow utilities */
.shadow { box-shadow: var(--shadow-base); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-none { box-shadow: none; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Transition */
.transition {
  transition: all var(--transition-base) var(--transition-timing);
}

.transition-colors {
  transition: color var(--transition-base) var(--transition-timing),
              background-color var(--transition-base) var(--transition-timing),
              border-color var(--transition-base) var(--transition-timing);
}

/* Hover effects */
.hover\:shadow-lg:hover {
  box-shadow: var(--shadow-lg);
}

.hover\:scale-105:hover {
  transform: scale(1.05);
}

@media (prefers-reduced-motion: no-preference) {
  .hover\:scale-105 {
    transition: transform var(--transition-base) var(--transition-timing);
  }
}

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

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}