/* 
 * SeymourOS CSS Framework
 * The fastest, most elegant CSS framework ever created
 * Modular, responsive, and stunningly beautiful
 * Version: 1.0.0
 */

/* ============================================
   1. FONT DEFINITIONS
   ============================================ */

/* Variable font — covers all weights in a single ~100 KB file. Modern
   browsers (Edge 17+, Chrome 62+, Firefox 62+, Safari 11+) get this. */
@font-face {
  font-family: 'Inter var';
  font-weight: 100 900;
  font-display: swap;
  font-style: normal;
  src: url('../fonts/Inter/InterV.woff2') format('woff2');
}

/* Legacy fallback for browsers without variable-font support. Gated so
   modern browsers don't fetch ~1 MB of unused static weights. */
@supports not (font-variation-settings: normal) {
  @font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 300;
    font-display: swap;
    src: url('../fonts/Inter/Inter-Light.woff2') format('woff2'),
         url('../fonts/Inter/Inter-Light.woff') format('woff');
  }

  @font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('../fonts/Inter/Inter-Regular.woff2') format('woff2'),
         url('../fonts/Inter/Inter-Regular.woff') format('woff');
  }

  @font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url('../fonts/Inter/Inter-Medium.woff2') format('woff2'),
         url('../fonts/Inter/Inter-Medium.woff') format('woff');
  }

  @font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 600;
    font-display: swap;
    src: url('../fonts/Inter/Inter-SemiBold.woff2') format('woff2'),
         url('../fonts/Inter/Inter-SemiBold.woff') format('woff');
  }

  @font-face {
    font-family: 'Inter';
    font-style: normal;
    font-weight: 700;
    font-display: swap;
    src: url('../fonts/Inter/Inter-Bold.woff2') format('woff2'),
         url('../fonts/Inter/Inter-Bold.woff') format('woff');
  }
}

/* ============================================
   2. CSS VARIABLES & THEMING
   ============================================ */
:root {
  /* Primary brand color - customizable via color picker */
  --primary-h: 215;
  --primary-s: 70%;
  --primary-l: 53%;
  
  /* Generate color scale from primary */
  --primary-50: hsl(var(--primary-h), var(--primary-s), 97%);
  --primary-100: hsl(var(--primary-h), var(--primary-s), 93%);
  --primary-200: hsl(var(--primary-h), var(--primary-s), 85%);
  --primary-300: hsl(var(--primary-h), var(--primary-s), 75%);
  --primary-400: hsl(var(--primary-h), var(--primary-s), 65%);
  --primary-500: hsl(var(--primary-h), var(--primary-s), var(--primary-l));
  --primary-600: hsl(var(--primary-h), var(--primary-s), 45%);
  --primary-700: hsl(var(--primary-h), var(--primary-s), 35%);
  --primary-800: hsl(var(--primary-h), var(--primary-s), 25%);
  --primary-900: hsl(var(--primary-h), var(--primary-s), 15%);
  
  /* Semantic colors */
  --success: hsl(142, 71%, 45%);
  --warning: hsl(38, 92%, 50%);
  --danger: hsl(0, 72%, 51%);
  --info: hsl(201, 98%, 41%);
  
  /* Neutral colors - Light mode */
  --gray-50: hsl(210, 20%, 98%);
  --gray-100: hsl(220, 14%, 96%);
  --gray-200: hsl(220, 13%, 91%);
  --gray-300: hsl(216, 12%, 84%);
  --gray-400: hsl(218, 11%, 65%);
  --gray-500: hsl(220, 9%, 46%);
  --gray-600: hsl(215, 14%, 34%);
  --gray-700: hsl(217, 19%, 27%);
  --gray-800: hsl(215, 28%, 17%);
  --gray-900: hsl(221, 39%, 11%);
  --gray-950: hsl(224, 71%, 4%);
  
  /* Typography scale */
  --font-family-sans: 'Inter var', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-family-serif: 'Gelasio', Georgia, serif;
  --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', monospace;
  
  /* Font sizes - fluid typography */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.375vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.625vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.5rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 3rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 4rem);
  
  /* Spacing scale */
  --space-0: 0;
  --space-px: 1px;
  --space-0-5: 0.125rem;
  --space-1: 0.25rem;
  --space-1-5: 0.375rem;
  --space-2: 0.5rem;
  --space-2-5: 0.625rem;
  --space-3: 0.75rem;
  --space-3-5: 0.875rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-7: 1.75rem;
  --space-8: 2rem;
  --space-9: 2.25rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-14: 3.5rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
  --space-40: 10rem;
  --space-48: 12rem;
  --space-56: 14rem;
  --space-64: 16rem;
  
  /* Radii */
  --radius-none: 0;
  --radius-sm: 0.125rem;
  --radius-base: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --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-base: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-2xl: 0 35px 60px -15px rgb(0 0 0 / 0.3);
  --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-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index scale */
  --z-0: 0;
  --z-10: 10;
  --z-20: 20;
  --z-30: 30;
  --z-40: 40;
  --z-50: 50;
  --z-60: 60;
  --z-70: 70;
  --z-80: 80;
  --z-90: 90;
  --z-100: 100;
  
  /* Light mode colors */
  --color-bg: white;
  --color-bg-h: 0;
  --color-bg-s: 0%;
  --color-bg-l: 100%;
  --color-bg-secondary: var(--gray-50);
  --color-bg-tertiary: var(--gray-100);
  --color-text: var(--gray-900);
  --color-text-secondary: var(--gray-600);
  --color-text-tertiary: var(--gray-500);
  --color-border: var(--gray-200);
  --color-border-secondary: var(--gray-300);
  --color-primary: var(--primary-500);
  --color-primary-hover: var(--primary-600);
  --color-primary-text: white;
}

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: var(--gray-950);
    --color-bg-h: 224;
    --color-bg-s: 71%;
    --color-bg-l: 4%;
    --color-bg-secondary: var(--gray-900);
    --color-bg-tertiary: var(--gray-800);
    --color-text: var(--gray-50);
    --color-text-secondary: var(--gray-300);
    --color-text-tertiary: var(--gray-400);
    --color-border: var(--gray-800);
    --color-border-secondary: var(--gray-700);
    --color-primary: var(--primary-400);
    --color-primary-hover: var(--primary-300);
    --color-primary-text: var(--gray-900);
    
    --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.1);
    --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.2), 0 1px 2px -1px rgb(0 0 0 / 0.2);
    --shadow-base: 0 4px 6px -1px rgb(0 0 0 / 0.2), 0 2px 4px -2px rgb(0 0 0 / 0.2);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.2), 0 4px 6px -4px rgb(0 0 0 / 0.2);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.2), 0 8px 10px -6px rgb(0 0 0 / 0.2);
    --shadow-xl: 0 25px 50px -12px rgb(0 0 0 / 0.5);
    --shadow-2xl: 0 35px 60px -15px rgb(0 0 0 / 0.6);
  }
}

/* Manual theme override classes */
.theme-light {
  --color-bg: white;
  --color-bg-h: 0;
  --color-bg-s: 0%;
  --color-bg-l: 100%;
  --color-bg-secondary: var(--gray-50);
  --color-bg-tertiary: var(--gray-100);
  --color-text: var(--gray-900);
  --color-text-secondary: var(--gray-600);
  --color-text-tertiary: var(--gray-500);
  --color-border: var(--gray-200);
  --color-border-secondary: var(--gray-300);
  --color-primary: var(--primary-500);
  --color-primary-hover: var(--primary-600);
  --color-primary-text: white;
}

.theme-dark {
  --color-bg: var(--gray-950);
  --color-bg-h: 224;
  --color-bg-s: 71%;
  --color-bg-l: 4%;
  --color-bg-secondary: var(--gray-900);
  --color-bg-tertiary: var(--gray-800);
  --color-text: var(--gray-50);
  --color-text-secondary: var(--gray-300);
  --color-text-tertiary: var(--gray-400);
  --color-border: var(--gray-800);
  --color-border-secondary: var(--gray-700);
  --color-primary: var(--primary-400);
  --color-primary-hover: var(--primary-300);
  --color-primary-text: var(--gray-900);
}

/* ============================================
   3. RESET & BASE STYLES
   ============================================ */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: "kern" 1;
  font-kerning: normal;
}

body {
  font-family: var(--font-family-sans);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
  letter-spacing: -0.025em;
  padding-top: 80px; /* Account for fixed navbar */
}

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

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

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

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

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

/* ============================================
   4. TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: var(--space-4);
  letter-spacing: -0.035em;
}

h1 { font-size: var(--text-5xl); font-weight: 700; letter-spacing: -0.045em; }
h2 { font-size: var(--text-4xl); letter-spacing: -0.04em; }
h3 { font-size: var(--text-3xl); letter-spacing: -0.035em; }
h4 { font-size: var(--text-2xl); letter-spacing: -0.03em; }
h5 { font-size: var(--text-xl); letter-spacing: -0.025em; }
h6 { font-size: var(--text-lg); letter-spacing: -0.02em; }

p {
  margin-bottom: var(--space-4);
}

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

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

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-info { color: var(--info); }

/* ============================================
   5. LAYOUT & CONTAINERS
   ============================================ */
.container {
  width: 100%;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

@media (min-width: 640px) {
  .container { max-width: 640px; }
}

@media (min-width: 768px) {
  .container { max-width: 768px; }
}

@media (min-width: 1024px) {
  .container { max-width: 1024px; }
}

@media (min-width: 1280px) {
  .container { max-width: 1280px; }
}

@media (min-width: 1536px) {
  .container { max-width: 1536px; }
}

.container-fluid {
  width: 100%;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.container-narrow {
  max-width: 768px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

/* Grid system */
.grid {
  display: grid;
  gap: var(--space-4);
}

.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)); }
.grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

/* Responsive grid */
@media (min-width: 640px) {
  .sm\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sm\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .sm\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .sm\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .md\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .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)); }
  .md\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .md\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
  .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)); }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .lg\:grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }
}

/* Flexbox 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; }
.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-initial { flex: 0 1 auto; }
.flex-none { flex: none; }

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

.gap-0 { gap: var(--space-0); }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }
.gap-10 { gap: var(--space-10); }
.gap-12 { gap: var(--space-12); }

/* ============================================
   6. COMPONENTS
   ============================================ */

/* Cards */
.card {
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-base);
}

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

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

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

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  font-weight: 500;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
  letter-spacing: -0.015em;
}

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

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
}

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

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

.btn-secondary:hover {
  background-color: var(--color-bg-secondary);
}

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

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

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

.btn-ghost:hover {
  background-color: var(--color-bg-secondary);
}

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

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

.btn-block {
  width: 100%;
}

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

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

.form-input,
.form-textarea,
.form-select {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgb(var(--primary-h) var(--primary-s) var(--primary-l) / 0.1);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-checkbox,
.form-radio {
  display: inline-block;
  margin-right: var(--space-2);
}

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

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

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

.table th,
.table td {
  padding: var(--space-3);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.table th {
  font-weight: 600;
  color: var(--color-text-secondary);
  background-color: var(--color-bg-secondary);
}

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

.table-striped tr:nth-child(even) {
  background-color: var(--color-bg-secondary);
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  /* Simulate natural lighting - navbar is "closer to light source" */
  background-color: hsl(var(--color-bg-h) var(--color-bg-s) calc(var(--color-bg-l) + 1%) / 0.95);
  backdrop-filter: blur(12px) brightness(1.02);
  -webkit-backdrop-filter: blur(12px) brightness(1.02);
  border-bottom: 1px solid var(--color-border);
  padding: 0.5rem 0;
  z-index: 9999;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--color-text);
}


/* Navbar now uses standard theme colors instead of inverted */

.navbar.scrolled {
  background-color: hsl(var(--color-bg-h) var(--color-bg-s) calc(var(--color-bg-l) + 2%) / 0.98);
  backdrop-filter: blur(16px) brightness(1.03);
  -webkit-backdrop-filter: blur(16px) brightness(1.03);
  box-shadow: var(--shadow-lg);
  border-bottom-color: hsl(var(--color-border-h) var(--color-border-s) var(--color-border-l) / 0.8);
}

/* Scrolled navbar uses enhanced effects */

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-brand {
  font-size: var(--text-xl);
  font-weight: 600;
  color: inherit;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.navbar-brand img {
  height: 32px;
  width: auto;
  transition: opacity 0.3s ease;
}

/* Smooth logo transitions */
.navbar-brand .logo-svg {
  opacity: 1;
}

/* Brief fade during logo switch */
.navbar-brand.logo-switching .logo-svg {
  opacity: 0.7;
}

.navbar-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.navbar-link {
  color: inherit;
  opacity: 0.8;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.navbar-link:hover,
.navbar-link.active {
  opacity: 1;
  color: var(--color-primary);
}

/* Mobile nav toggle */
.navbar-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}

@media (max-width: 768px) {
  .navbar-toggle {
    display: block;
  }
  
  .navbar-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    padding: var(--space-4);
    gap: var(--space-4);
    display: none;
  }
  
  .navbar-nav.active {
    display: flex;
  }
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgb(0 0 0 / 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-100);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

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

.modal-content {
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

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

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

.modal-close {
  background: none;
  border: none;
  font-size: var(--text-2xl);
  cursor: pointer;
  color: var(--color-text-tertiary);
  padding: var(--space-1);
}

/* Alerts */
.alert {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
  border: 1px solid transparent;
}

.alert-success {
  background-color: hsl(142 71% 45% / 0.1);
  color: var(--success);
  border-color: var(--success);
}

.alert-warning {
  background-color: hsl(38 92% 50% / 0.1);
  color: var(--warning);
  border-color: var(--warning);
}

.alert-danger {
  background-color: hsl(0 72% 51% / 0.1);
  color: var(--danger);
  border-color: var(--danger);
}

.alert-info {
  background-color: hsl(201 98% 41% / 0.1);
  color: var(--info);
  border-color: var(--info);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-0-5) var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-text);
}

.badge-secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text);
}

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

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

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

/* Tabs */
.tabs {
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: var(--space-6);
}

.tab {
  padding: var(--space-3) 0;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.tab:hover {
  color: var(--color-text);
}

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

.tab-content {
  padding: var(--space-6) 0;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

/* Progress bars */
.progress {
  height: var(--space-2);
  background-color: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  background-color: var(--color-primary);
  transition: width var(--transition-slow);
}

/* Tooltips */
.tooltip {
  position: relative;
  display: inline-block;
}

.tooltip-content {
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--gray-900);
  color: white;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-50);
}

.tooltip:hover .tooltip-content {
  opacity: 1;
  visibility: visible;
}

/* ============================================
   7. UTILITY CLASSES
   ============================================ */

/* Display */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

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

/* Spacing */
.m-0 { margin: var(--space-0); }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-5 { margin: var(--space-5); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }
.m-auto { margin: auto; }

.mx-auto { margin-left: auto; margin-right: auto; }
.my-1 { margin-top: var(--space-1); margin-bottom: var(--space-1); }
.my-2 { margin-top: var(--space-2); margin-bottom: var(--space-2); }
.my-3 { margin-top: var(--space-3); margin-bottom: var(--space-3); }
.my-4 { margin-top: var(--space-4); margin-bottom: var(--space-4); }
.my-5 { margin-top: var(--space-5); margin-bottom: var(--space-5); }
.my-6 { margin-top: var(--space-6); margin-bottom: var(--space-6); }
.my-8 { margin-top: var(--space-8); margin-bottom: var(--space-8); }

.mt-0 { margin-top: var(--space-0); }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

.mb-0 { margin-bottom: var(--space-0); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.ml-0 { margin-left: var(--space-0); }
.ml-1 { margin-left: var(--space-1); }
.ml-2 { margin-left: var(--space-2); }
.ml-3 { margin-left: var(--space-3); }
.ml-4 { margin-left: var(--space-4); }
.ml-5 { margin-left: var(--space-5); }
.ml-6 { margin-left: var(--space-6); }
.ml-8 { margin-left: var(--space-8); }

.mr-0 { margin-right: var(--space-0); }
.mr-1 { margin-right: var(--space-1); }
.mr-2 { margin-right: var(--space-2); }
.mr-3 { margin-right: var(--space-3); }
.mr-4 { margin-right: var(--space-4); }
.mr-5 { margin-right: var(--space-5); }
.mr-6 { margin-right: var(--space-6); }
.mr-8 { margin-right: var(--space-8); }

/* Padding */
.p-0 { padding: var(--space-0); }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.px-1 { padding-left: var(--space-1); padding-right: var(--space-1); }
.px-2 { padding-left: var(--space-2); padding-right: var(--space-2); }
.px-3 { padding-left: var(--space-3); padding-right: var(--space-3); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-5 { padding-left: var(--space-5); padding-right: var(--space-5); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }
.px-8 { padding-left: var(--space-8); padding-right: var(--space-8); }

.py-1 { padding-top: var(--space-1); padding-bottom: var(--space-1); }
.py-2 { padding-top: var(--space-2); padding-bottom: var(--space-2); }
.py-3 { padding-top: var(--space-3); padding-bottom: var(--space-3); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-5 { padding-top: var(--space-5); padding-bottom: var(--space-5); }
.py-6 { padding-top: var(--space-6); padding-bottom: var(--space-6); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }

/* Width */
.w-full { width: 100%; }
.w-auto { width: auto; }
.w-1\/2 { width: 50%; }
.w-1\/3 { width: 33.333333%; }
.w-2\/3 { width: 66.666667%; }
.w-1\/4 { width: 25%; }
.w-3\/4 { width: 75%; }

/* Height */
.h-full { height: 100%; }
.h-auto { height: auto; }
.h-screen { height: 100vh; }

/* Border radius */
.rounded-none { border-radius: var(--radius-none); }
.rounded-sm { border-radius: var(--radius-sm); }
.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-2xl { border-radius: var(--radius-2xl); }
.rounded-3xl { border-radius: var(--radius-3xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadows */
.shadow-none { box-shadow: none; }
.shadow-xs { box-shadow: var(--shadow-xs); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-base); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }
.shadow-inner { box-shadow: var(--shadow-inner); }

/* Borders */
.border { border: 1px solid var(--color-border); }
.border-0 { border-width: 0; }
.border-2 { border-width: 2px; }
.border-t { border-top: 1px solid var(--color-border); }
.border-r { border-right: 1px solid var(--color-border); }
.border-b { border-bottom: 1px solid var(--color-border); }
.border-l { border-left: 1px solid var(--color-border); }

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-25 { opacity: 0.25; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

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

/* Z-index */
.z-0 { z-index: var(--z-0); }
.z-10 { z-index: var(--z-10); }
.z-20 { z-index: var(--z-20); }
.z-30 { z-index: var(--z-30); }
.z-40 { z-index: var(--z-40); }
.z-50 { z-index: var(--z-50); }

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }
.cursor-wait { cursor: wait; }
.cursor-not-allowed { cursor: not-allowed; }

/* ============================================
   8. RESPONSIVE UTILITIES
   ============================================ */
@media (min-width: 640px) {
  .sm\:block { display: block; }
  .sm\:inline-block { display: inline-block; }
  .sm\:inline { display: inline; }
  .sm\:flex { display: flex; }
  .sm\:hidden { display: none; }
}

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

@media (min-width: 1024px) {
  .lg\:block { display: block; }
  .lg\:inline-block { display: inline-block; }
  .lg\:inline { display: inline; }
  .lg\:flex { display: flex; }
  .lg\:hidden { display: none; }
}

@media (min-width: 1280px) {
  .xl\:block { display: block; }
  .xl\:inline-block { display: inline-block; }
  .xl\:inline { display: inline; }
  .xl\:flex { display: flex; }
  .xl\:hidden { display: none; }
}

/* ============================================
   9. ANIMATIONS
   ============================================ */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

@keyframes slideInUp {
  from {
    transform: translateY(50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideInDown {
  from {
    transform: translateY(-50px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes scaleIn {
  from {
    transform: scale(0.7);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(-10px); }
  60% { transform: translateY(-5px); }
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.7; }
  100% { transform: scale(1); opacity: 1; }
}

/* Animation classes with longer durations for visibility */
.animate-fadeIn { 
  animation: fadeIn 1s ease-out; 
  animation-fill-mode: both;
}

.animate-fadeOut { 
  animation: fadeOut 1s ease-out; 
  animation-fill-mode: both;
}

.animate-slideInUp { 
  animation: slideInUp 0.8s ease-out; 
  animation-fill-mode: both;
}

.animate-slideInDown { 
  animation: slideInDown 0.8s ease-out; 
  animation-fill-mode: both;
}

.animate-scaleIn { 
  animation: scaleIn 0.6s ease-out; 
  animation-fill-mode: both;
}

.animate-spin { 
  animation: spin 2s linear infinite; 
}

.animate-bounce { 
  animation: bounce 1s ease-in-out; 
  animation-fill-mode: both;
}

.animate-pulse { 
  animation: pulse 1s ease-in-out infinite; 
}

/* Initial state for scroll-triggered animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(20px);
  transition: none;
}

.animate-on-scroll.animate-fadeIn {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.animate-slideInUp {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.animate-scaleIn {
  opacity: 1;
  transform: scale(1);
}

/* ============================================
   10. PRINT STYLES
   ============================================ */
@media print {
  body {
    color: black;
    background: white;
  }
  
  .no-print {
    display: none !important;
  }
  
  a {
    color: black;
    text-decoration: underline;
  }
  
  .container {
    max-width: 100%;
  }
}

/* ============================================
   11. PERFORMANCE OPTIMIZATIONS
   ============================================ */
.gpu-accelerated {
  transform: translateZ(0);
  will-change: transform;
}

.no-select {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* Reduce motion for accessibility */
@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;
  }
}