/**
 * ThriveAB Design System
 * Enterprise/Government Efficacy Standards
 * Professional medical branding for investor/partner communication
 * WCAG 2.1 AA compliant
 */

/* ============================================
   COLOR SYSTEM
   ============================================ */

:root {
  /* Primary - Clinical Blue (trust, medical authority) */
  --color-primary-900: #0B3D91;
  --color-primary-800: #154A9E;
  --color-primary-700: #1E5BA8;
  --color-primary-600: #2563EB;
  --color-primary-500: #3B82F6;
  --color-primary-400: #60A5FA;
  --color-primary-300: #93C5FD;
  --color-primary-200: #BFDBFE;
  --color-primary-100: #DBEAFE;
  --color-primary-50: #EFF6FF;
  
  /* Secondary - Metabolic Green (health, vitality, growth) */
  --color-secondary-900: #065F46;
  --color-secondary-800: #047857;
  --color-secondary-700: #059669;
  --color-secondary-600: #10B981;
  --color-secondary-500: #34D399;
  --color-secondary-400: #6EE7B7;
  --color-secondary-300: #A7F3D0;
  --color-secondary-200: #D1FAE5;
  --color-secondary-100: #ECFDF5;
  --color-secondary-50: #F0FDF4;
  
  /* Accent - Warm Amber (hope, energy, transformation) */
  --color-accent-900: #92400E;
  --color-accent-800: #B45309;
  --color-accent-700: #D97706;
  --color-accent-600: #F59E0B;
  --color-accent-500: #FFB84D;
  --color-accent-400: #FCD34D;
  --color-accent-300: #FDE68A;
  --color-accent-200: #FEF3C7;
  --color-accent-100: #FEF9E7;
  
  /* Neutral - Professional Slate */
  --color-neutral-900: #0F172A;
  --color-neutral-800: #1E293B;
  --color-neutral-700: #334155;
  --color-neutral-600: #475569;
  --color-neutral-500: #64748B;
  --color-neutral-400: #94A3B8;
  --color-neutral-300: #CBD5E1;
  --color-neutral-200: #E2E8F0;
  --color-neutral-100: #F1F5F9;
  --color-neutral-50: #F8FAFC;
  --color-white: #FFFFFF;
  
  /* Semantic Colors */
  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  --color-warning: #F59E0B;
  --color-warning-light: #FEF3C7;
  --color-error: #EF4444;
  --color-error-light: #FEE2E2;
  --color-info: #3B82F6;
  --color-info-light: #DBEAFE;
}

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

:root {
  /* Font Families */
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Courier New', monospace;
  
  /* Type Scale (1.250 - Major Third) */
  --text-xs: 0.64rem;      /* 10.24px */
  --text-sm: 0.8rem;       /* 12.8px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.25rem;      /* 20px */
  --text-xl: 1.563rem;     /* 25px */
  --text-2xl: 1.953rem;    /* 31.25px */
  --text-3xl: 2.441rem;    /* 39px */
  --text-4xl: 3.052rem;    /* 48.8px */
  --text-5xl: 3.815rem;    /* 61px */
  
  /* Line Heights */
  --leading-none: 1;
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  --leading-loose: 2;
  
  /* Font Weights */
  --weight-light: 300;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --weight-extrabold: 800;
  
  /* Letter Spacing */
  --tracking-tight: -0.025em;
  --tracking-normal: 0;
  --tracking-wide: 0.025em;
  --tracking-wider: 0.05em;
}

/* ============================================
   SPACING SYSTEM (8px base)
   ============================================ */

:root {
  --space-0: 0;
  --space-px: 1px;
  --space-0-5: 0.25rem;    /* 4px */
  --space-1: 0.5rem;       /* 8px */
  --space-2: 1rem;         /* 16px */
  --space-3: 1.5rem;       /* 24px */
  --space-4: 2rem;         /* 32px */
  --space-5: 2.5rem;       /* 40px */
  --space-6: 3rem;         /* 48px */
  --space-8: 4rem;         /* 64px */
  --space-10: 5rem;        /* 80px */
  --space-12: 6rem;        /* 96px */
  --space-16: 8rem;        /* 128px */
  --space-20: 10rem;       /* 160px */
  --space-24: 12rem;       /* 192px */
}

/* ============================================
   BORDER & SHADOWS
   ============================================ */

:root {
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.25rem;    /* 4px */
  --radius-base: 0.5rem;   /* 8px */
  --radius-lg: 0.75rem;    /* 12px */
  --radius-xl: 1rem;       /* 16px */
  --radius-full: 9999px;
  
  /* Border Widths */
  --border-width: 1px;
  --border-width-2: 2px;
  --border-width-4: 4px;
  
  /* 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);
  
  /* Transition Timing */
  --transition-fast: 150ms;
  --transition-base: 200ms;
  --transition-slow: 300ms;
  --transition-easing: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   LAYOUT SYSTEM
   ============================================ */

:root {
  /* Container Widths */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;
  
  /* Z-Index Scale */
  --z-base: 1;
  --z-dropdown: 10;
  --z-sticky: 100;
  --z-overlay: 1000;
  --z-modal: 10000;
  --z-toast: 100000;
}

/* ============================================
   BASE STYLES
   ============================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-neutral-900);
  background-color: var(--color-neutral-50);
  min-height: 100vh;
}

/* ============================================
   TYPOGRAPHY UTILITIES
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-neutral-900);
  margin-bottom: var(--space-2);
}

h1 {
  font-size: var(--text-4xl);
  letter-spacing: var(--tracking-tight);
}

h2 {
  font-size: var(--text-3xl);
  letter-spacing: var(--tracking-tight);
}

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

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

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

h6 {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
}

p {
  margin-bottom: var(--space-3);
  color: var(--color-neutral-700);
}

a {
  color: var(--color-primary-600);
  text-decoration: none;
  transition: color var(--transition-base) var(--transition-easing);
}

a:hover {
  color: var(--color-primary-700);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

strong {
  font-weight: var(--weight-semibold);
  color: var(--color-neutral-900);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--color-neutral-100);
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-sm);
  color: var(--color-neutral-800);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background-color: var(--color-neutral-900);
  color: var(--color-neutral-100);
  padding: var(--space-4);
  border-radius: var(--radius-base);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

pre code {
  background-color: transparent;
  padding: 0;
  color: inherit;
}

/* ============================================
   LAYOUT COMPONENTS
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.container-wide {
  max-width: var(--container-2xl);
}

.container-narrow {
  max-width: var(--container-md);
}

/* ============================================
   NAVIGATION
   ============================================ */

.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-neutral-200);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-sm);
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
}

.site-logo {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary-700);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-menu {
  display: flex;
  gap: var(--space-4);
  list-style: none;
}

.nav-link {
  color: var(--color-neutral-700);
  font-weight: var(--weight-medium);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-base);
  transition: all var(--transition-base) var(--transition-easing);
}

.nav-link:hover {
  background-color: var(--color-primary-50);
  color: var(--color-primary-700);
  text-decoration: none;
}

.nav-link.active {
  background-color: var(--color-primary-100);
  color: var(--color-primary-800);
}

/* ============================================
   CARD COMPONENTS
   ============================================ */

.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-base);
  padding: var(--space-6);
  border: 1px solid var(--color-neutral-200);
}

.card-header {
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-neutral-200);
}

.card-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-neutral-900);
  margin-bottom: var(--space-1);
}

.card-subtitle {
  font-size: var(--text-sm);
  color: var(--color-neutral-600);
  font-weight: var(--weight-normal);
}

.card-body {
  color: var(--color-neutral-700);
}

.card-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-neutral-200);
  display: flex;
  justify-content: flex-end;
  gap: var(--space-2);
}

/* ============================================
   METRIC CARDS
   ============================================ */

.metric-card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  border: 1px solid var(--color-neutral-200);
  box-shadow: var(--shadow-base);
  transition: box-shadow var(--transition-base) var(--transition-easing);
}

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

.metric-card-label {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-neutral-600);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-1);
}

.metric-card-value {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  color: var(--color-neutral-900);
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--space-2);
  word-break: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
  line-height: var(--leading-tight);
}

.metric-card-change {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.metric-card-change.positive {
  color: var(--color-success);
}

.metric-card-change.negative {
  color: var(--color-error);
}

.metric-card-change.neutral {
  color: var(--color-neutral-600);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  line-height: var(--leading-tight);
  border-radius: var(--radius-base);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base) var(--transition-easing);
  text-decoration: none;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-700);
  border-color: var(--color-primary-700);
  text-decoration: none;
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-primary-700);
  border-color: var(--color-primary-300);
}

.btn-secondary:hover {
  background-color: var(--color-primary-50);
  border-color: var(--color-primary-400);
  text-decoration: none;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-neutral-700);
}

.btn-ghost:hover {
  background-color: var(--color-neutral-100);
  text-decoration: none;
}

.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);
}

/* ============================================
   TABLES
   ============================================ */

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-neutral-200);
  background-color: var(--color-white);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

thead {
  background-color: var(--color-neutral-50);
  border-bottom: 2px solid var(--color-neutral-300);
}

th {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-neutral-900);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-neutral-200);
  color: var(--color-neutral-700);
}

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

tbody tr:hover {
  background-color: var(--color-neutral-50);
}

.table-numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* ============================================
   TABS
   ============================================ */

.tabs {
  border-bottom: 1px solid var(--color-neutral-200);
  background-color: var(--color-white);
  position: sticky;
  top: 64px; /* Below site header */
  z-index: var(--z-sticky);
}

.tab-list {
  display: flex;
  gap: var(--space-1);
  list-style: none;
  padding: 0 var(--space-4);
}

.tab-button {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--weight-medium);
  color: var(--color-neutral-600);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base) var(--transition-easing);
}

.tab-button:hover {
  color: var(--color-primary-700);
  background-color: var(--color-primary-50);
}

.tab-button.active {
  color: var(--color-primary-700);
  border-bottom-color: var(--color-primary-600);
}

.tab-button:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}

.tab-panel {
  padding: var(--space-6) var(--space-4);
}

.tab-panel[hidden] {
  display: none;
}

/* ============================================
   BADGES & LABELS
   ============================================ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  border-radius: var(--radius-full);
}

.badge-primary {
  background-color: var(--color-primary-100);
  color: var(--color-primary-800);
}

.badge-success {
  background-color: var(--color-success-light);
  color: var(--color-secondary-900);
}

.badge-warning {
  background-color: var(--color-warning-light);
  color: var(--color-accent-900);
}

.badge-error {
  background-color: var(--color-error-light);
  color: #991B1B;
}

.badge-info {
  background-color: var(--color-info-light);
  color: var(--color-primary-900);
}

/* ============================================
   GRID SYSTEM
   ============================================ */

.grid {
  display: grid;
  gap: var(--space-4);
}

.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); }

@media (max-width: 768px) {
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

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

/* Text Colors */
.text-primary { color: var(--color-primary-700); }
.text-secondary { color: var(--color-secondary-700); }
.text-accent { color: var(--color-accent-700); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-muted { color: var(--color-neutral-600); }

/* Background Colors */
.bg-primary { background-color: var(--color-primary-600); }
.bg-secondary { background-color: var(--color-secondary-600); }
.bg-white { background-color: var(--color-white); }
.bg-gray-50 { background-color: var(--color-neutral-50); }

/* Spacing Utilities */
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

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

.p-0 { padding: 0; }
.p-2 { padding: var(--space-2); }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

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

/* Flex Utilities */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

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

/* Skip to main content link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-primary-700);
  color: var(--color-white);
  padding: var(--space-2) var(--space-4);
  text-decoration: none;
  border-radius: 0 0 var(--radius-base) 0;
  z-index: var(--z-modal);
}

.skip-link:focus {
  top: 0;
}

/* 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;
}

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  body {
    background-color: var(--color-white);
    color: #000;
  }
  
  .site-header,
  .site-nav,
  .btn,
  .no-print {
    display: none !important;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
  
  h1, h2, h3, h4, h5, h6 {
    page-break-after: avoid;
  }
  
  a {
    text-decoration: underline;
    color: #000;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: var(--text-xs);
    color: #666;
  }
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Mobile: < 640px (default styles) */
/* Tablet: 640px - 1024px */
/* Desktop: > 1024px */

@media (min-width: 640px) {
  html {
    font-size: 16px;
  }
}

@media (min-width: 1024px) {
  html {
    font-size: 18px;
  }
  
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1280px) {
  html {
    font-size: 18px;
  }
}