/* ==========================================================================
   NRLC.ai — W3C Functional Authority Design System
   Utilitarian interface prioritizing clear, rapid delivery of complex 
   information over decorative aesthetics. Form strictly follows function.
   WCAG AAA compliance target. High information density. Modular segmentation.
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  font-size: 16px; /* Base 16px for WCAG AAA compliance */
  overflow-x: hidden; /* Prevent horizontal scrolling */
  max-width: 100vw; /* Never exceed viewport width */
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #000000; /* WCAG AAA: 21:1 contrast on white */
  background-color: #ffffff;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden; /* Prevent horizontal scrolling */
  max-width: 100vw; /* Never exceed viewport width */
}

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

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

/* ==========================================================================
   2. DESIGN TOKENS — Functional, Minimalist, High Contrast
   ========================================================================== */
:root {
  /* Typography — System fonts only, no decorative typefaces */
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
  
  /* Color Palette — 2 Main Colors + 1 Shade */
  --color-primary: #12355e;            /* Main color 1 - Dark blue */
  --color-secondary: #000000;          /* Main color 2 - Black */
  --color-shade: #2a4a6e;              /* Shade - Lighter version of primary */
  
  /* Derived Colors */
  --color-text-primary: #000000;       /* Main color 2 */
  --color-text-secondary: #12355e;     /* Main color 1 */
  --color-text-muted: #2a4a6e;         /* Shade */
  --color-bg-primary: #ffffff;          /* White background */
  --color-bg-secondary: #f5f5f5;      /* Light gray using shade logic */
  --color-bg-tertiary: #e8e8e8;        /* Lighter gray */
  --color-border: #2a4a6e;             /* Shade for borders */
  --color-border-strong: #000000;      /* Main color 2 */
  
  /* Brand Accent — Uses main colors */
  --color-brand: #12355e;              /* Main color 1 */
  --color-brand-hover: #2a4a6e;        /* Shade */
  --color-brand-active: #000000;       /* Main color 2 */
  
  /* Status Colors — Derived from main colors */
  --color-success: #12355e;            /* Main color 1 */
  --color-error: #000000;              /* Main color 2 */
  --color-warning: #2a4a6e;           /* Shade */
  
  /* Layout — Modular, Efficient (8pt rhythm) */
  --container-max-width: 1280px; /* max-w-screen-xl equivalent */
  --container-padding: 1rem;     /* 16px = 2×8pt */
  --container-padding-sm: 1.5rem; /* 24px = 3×8pt */
  --container-padding-lg: 2rem;   /* 32px = 4×8pt */
  --section-spacing-y: 3rem;     /* 48px = 6×8pt */
  --section-spacing-y-lg: 4rem;  /* 64px = 8×8pt */
  --module-spacing: 1.5rem;      /* 24px = 3×8pt */
  --content-spacing: 1rem;       /* 16px = 2×8pt */
  --section-gap: 1.5rem;         /* 24px = 3×8pt */
  
  /* Typography Scale — Size & Weight Only */
  --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-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Line Heights — Optimized for readability */
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.8;
  
  /* Spacing — 8pt rhythm only */
  --spacing-0: 0;          /* 0px */
  --spacing-2: 0.125rem;   /* 2px */
  --spacing-4: 0.25rem;    /* 4px */
  --spacing-6: 0.375rem;   /* 6px */
  --spacing-8: 0.5rem;     /* 8px */
  --spacing-12: 0.75rem;   /* 12px */
  --spacing-16: 1rem;      /* 16px */
  --spacing-20: 1.25rem;   /* 20px */
  --spacing-24: 1.5rem;    /* 24px */
  --spacing-32: 2rem;      /* 32px */
  --spacing-40: 2.5rem;    /* 40px */
  --spacing-48: 3rem;      /* 48px */
  --spacing-64: 4rem;      /* 64px */
  
  /* Legacy aliases for compatibility */
  --spacing-xs: var(--spacing-4);
  --spacing-sm: var(--spacing-8);
  --spacing-md: var(--spacing-16);
  --spacing-lg: var(--spacing-24);
  --spacing-xl: var(--spacing-32);
  --spacing-2xl: var(--spacing-48);
  
  /* Borders — Clear separation */
  --border-width: 1px;
  --border-width-strong: 2px;
  --border-style: solid;
  
  /* Focus — WCAG AAA compliant focus indicators */
  --focus-outline: 3px solid #0066cc;
  --focus-outline-offset: 2px;
  
  /* Animation — Subtle, Purposeful */
  --ease-functional: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-base: 200ms;
  --duration-slow: 300ms;
}

/* ==========================================================================
   3. TYPOGRAPHY HIERARCHY — Size, Weight, Color Only
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-md) 0;
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-primary);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
}

h4 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
}

h5 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-sm);
}

h6 {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--spacing-sm);
}

p {
  margin: 0 0 var(--spacing-md) 0;
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
}

.lead {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-relaxed);
  font-weight: var(--font-weight-normal);
  color: var(--color-text-primary);
}

small, .small {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

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

/* ==========================================================================
   4. LINKS — Functional, Unambiguous
   ========================================================================== */
a {
  color: var(--color-brand);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--duration-fast) var(--ease-functional);
}

a:hover {
  color: var(--color-brand-hover);
  text-decoration-thickness: 2px;
}

a:active {
  color: var(--color-brand-active);
}

a:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
}

/* ==========================================================================
   5. LAYOUT — Modular Segmentation
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--container-padding-sm);
  }
}

@media (min-width: 1024px) {
  .container {
    padding:  var(--container-padding-lg);
  }
}

.section {
  padding: var(--section-spacing-y) 0;
}

@media (min-width: 1024px) {
  .section {
    padding: var(--section-spacing-y-lg) 0;
  }
}

.section__content {
  display: flex;
  flex-direction: column;
  gap: var(--section-gap);
}

.module {
  margin-bottom: var(--module-spacing);
}

/* Horizontal Rules — Clear Section Separation */
hr {
  border: 0;
  border-top: var(--border-width-strong) solid var(--color-border-strong);
  margin: var(--spacing-xl) 0;
}

/* ==========================================================================
   6. NAVIGATION — Deep Multi-Tiered (W3C Style)
   ========================================================================== */
.site-header {
  background-color: var(--color-bg-primary);
  border-bottom: var(--border-width-strong) solid var(--color-border-strong);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-primary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-md) var(--container-padding);
  background-color: var(--color-bg-primary);
}

.nav-primary__brand {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  text-decoration: none;
  white-space: nowrap;
  display: flex;
  align-items: center;
}

.nav-primary__brand img {
  height: 32px;
  width: auto;
  display: block;
  transform-origin: center center;
  transform: rotate(0deg);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-primary__brand:hover {
  opacity: 0.8;
  text-decoration: none;
}

.nav-primary__brand:hover img {
  transform: rotate(60deg);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-primary__brand:not(:hover) img {
  animation: leverSnapBack 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
}

@keyframes leverSnapBack {
  0% {
    transform: rotate(60deg);
  }
  50% {
    transform: rotate(-8deg);
  }
  70% {
    transform: rotate(3deg);
  }
  85% {
    transform: rotate(-1deg);
  }
  100% {
    transform: rotate(0deg);
  }
}

.nav-primary__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: var(--spacing-xs);
  background: transparent;
  border: none;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-primary__toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-primary);
  transition: transform var(--duration-base) var(--ease-functional),
              opacity var(--duration-base) var(--ease-functional);
}

.nav-primary__toggle[aria-expanded="true"] .nav-primary__toggle-icon:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.nav-primary__toggle[aria-expanded="true"] .nav-primary__toggle-icon:nth-child(2) {
  opacity: 0;
}

.nav-primary__toggle[aria-expanded="true"] .nav-primary__toggle-icon:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

.nav-primary__menu {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-primary__item {
  position: relative;
}

.nav-primary__link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text-primary);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-base);
  border-bottom: 2px solid transparent;
  transition: border-color var(--duration-fast) var(--ease-functional);
}

.nav-primary__link:hover {
  border-bottom-color: var(--color-brand);
  color: var(--color-text-primary);
}

.nav-primary__link[aria-current="page"] {
  border-bottom-color: var(--color-brand);
  color: var(--color-brand);
  font-weight: var(--font-weight-semibold);
}

/* Dropdown Navigation */
.nav-primary__item--has-dropdown {
  position: relative;
}

.nav-primary__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--color-bg-primary);
  border: var(--border-width-strong) solid var(--color-border-strong);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  list-style: none;
  margin: 0;
  padding: var(--spacing-8);
  display: none;
  z-index: 1000;
  margin-top: var(--spacing-4);
}

.nav-primary__item--has-dropdown:hover .nav-primary__dropdown,
.nav-primary__item--has-dropdown:focus-within .nav-primary__dropdown {
  display: block;
}

.nav-primary__dropdown-link {
  display: block;
  padding: var(--spacing-8) var(--spacing-12);
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
  transition: background-color var(--duration-fast) var(--ease-functional);
}

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

@media (max-width: 768px) {
  .nav-primary__dropdown {
    position: static;
    display: block;
    border: none;
    box-shadow: none;
    padding-left: var(--spacing-16);
    margin-top: var(--spacing-8);
  }
  
  .nav-primary__item--has-dropdown:hover .nav-primary__dropdown {
    display: block;
  }
}

.nav-primary__link--button {
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  font-weight: inherit;
  color: var(--color-text-primary);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color var(--duration-fast) var(--ease-functional);
}

.nav-primary__link--button:hover {
  border-bottom-color: var(--color-brand);
  color: var(--color-text-primary);
}

/* Secondary Navigation — Deep Hierarchy */
.nav-secondary {
  background-color: var(--color-bg-secondary);
  border-bottom: var(--border-width) solid var(--color-border);
  padding: var(--spacing-sm) var(--container-padding);
}

.nav-secondary__menu {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-secondary__item {
  position: relative;
}

.nav-secondary__link {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-normal);
}

.nav-secondary__link:hover {
  color: var(--color-brand);
  text-decoration: underline;
}

.nav-secondary__link[aria-current="page"] {
  color: var(--color-brand);
  font-weight: var(--font-weight-medium);
}

/* Tertiary Navigation — Deepest Level */
.nav-tertiary {
  background-color: var(--color-bg-tertiary);
  border-bottom: var(--border-width) solid var(--color-border);
  padding: var(--spacing-xs) var(--container-padding);
}

.nav-tertiary__menu {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-tertiary__link {
  display: block;
  padding: var(--spacing-xs) var(--spacing-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--font-size-xs);
}

.nav-tertiary__link:hover {
  color: var(--color-brand);
  text-decoration: underline;
}

/* ==========================================================================
   7. CONTENT BLOCKS — High-Density Information Modules
   ========================================================================== */
.content-block {
  margin-bottom: var(--module-spacing);
  padding: var(--content-spacing);
  background-color: var(--color-bg-primary);
  border: var(--border-width) solid var(--color-border);
  animation: fadeInUp var(--duration-slow) var(--ease-functional) both;
  max-width: 100%; /* Prevent overflow */
  overflow: hidden; /* Clip content that exceeds container */
  box-sizing: border-box; /* Include padding in width calculation */
  display: flex;
  flex-direction: column;
}

.content-block__header {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: var(--border-width) solid var(--color-border);
}

.content-block__title {
  margin: 0;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.content-block__body {
  color: var(--color-text-primary);
  display: flex;
  flex-direction: column;
  flex: 1;
  max-width: 100%; /* Prevent overflow */
  overflow-wrap: break-word; /* Allow text to wrap */
  box-sizing: border-box; /* Include padding in width calculation */
}

/* Catalog items: anchor buttons to bottom left */
/* Grid items: ensure flexbox layout for button anchoring */
.grid .content-block {
  display: flex !important;
  flex-direction: column !important;
  min-height: 0;
  max-width: 100%; /* Prevent overflow */
  overflow: hidden; /* Clip content that exceeds container */
}

.grid .content-block .content-block__body {
  min-height: 0;
  display: flex !important;
  flex-direction: column !important;
  flex: 1 !important;
  max-width: 100%; /* Prevent overflow */
  overflow-wrap: break-word; /* Allow text to wrap */
}

.grid .content-block .btn-group {
  margin-top: auto !important;
  margin-bottom: 0 !important;
  justify-content: flex-start !important;
  max-width: 100%; /* Ensure button group fits */
}

/* Link Tree Styling - Technical Research Aesthetic */
.link-tree {
  font-size: 0.8125rem;
  line-height: 1.6;
  font-family: 'Courier New', 'Consolas', 'Monaco', monospace;
  color: var(--color-text-primary);
  margin-bottom: 1.5rem; /* Add spacing between link tree and buttons below */
}

.link-tree strong {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 0.75rem;
  color: var(--color-text-primary);
}

.link-tree ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.link-tree li {
  margin: 0;
  padding: 0;
}

.link-tree a {
  color: var(--color-brand, #0066cc);
  text-decoration: none;
  border-bottom: 1px dotted currentColor;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.link-tree a:hover {
  color: var(--color-brand-hover, #0052a3);
  border-bottom-color: var(--color-brand-hover, #0052a3);
  border-bottom-style: solid;
}

.content-block--highlighted {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-text-primary);
}

/* ==========================================================================
   8. LISTS — Clear, Scannable
   ========================================================================== */
ul, ol {
  margin: 0 0 var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
}

li {
  margin-bottom: var(--spacing-sm);
  line-height: var(--line-height-normal);
}

ul {
  list-style-type: disc;
}

ol {
  list-style-type: decimal;
}

/* Definition Lists — FAQ, Terms */
dl {
  margin: 0 0 var(--spacing-md) 0;
}

dt {
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-primary);
}

dd {
  margin: 0 0 var(--spacing-md) var(--spacing-lg);
  color: var(--color-text-primary);
}

/* ==========================================================================
   9. BUTTONS — Functional, Unambiguous — UNIFORM SIZING & SPACING
   ========================================================================== */
/* Base button — EXACT uniform sizing for ALL buttons */
.btn {
  /* Uniform sizing */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px; /* Touch target minimum - FIXED */
  padding: 12px 24px; /* EXACT padding - 12px vertical, 24px horizontal */
  box-sizing: border-box;
  max-width: 100%; /* Ensure buttons fit within containers */
  word-wrap: break-word; /* Allow long text to wrap */
  overflow-wrap: break-word; /* Modern property for word wrapping */
  white-space: normal; /* Allow text to wrap */
  
  /* Uniform typography */
  font-size: 16px; /* FIXED - no variation */
  font-weight: 500; /* FIXED - medium weight */
  line-height: 1.5; /* FIXED */
  text-align: center;
  text-decoration: none;
  /* white-space: nowrap; REMOVED - allow text to wrap */
  
  /* Uniform appearance */
  color: var(--color-text-primary);
  background-color: var(--color-bg-secondary);
  border: 2px solid var(--color-border-strong);
  cursor: pointer;
  
  /* Uniform transitions */
  transition: background-color var(--duration-fast) var(--ease-functional), 
              border-color var(--duration-fast) var(--ease-functional),
              transform var(--duration-fast) var(--ease-functional),
              box-shadow var(--duration-fast) var(--ease-functional);
  
  /* Reset any inherited styles */
  margin: 0;
  width: auto;
  min-width: auto;
}

.btn:hover {
  background-color: var(--color-bg-tertiary);
  border-color: var(--color-brand);
  color: var(--color-text-primary);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn:active {
  background-color: var(--color-bg-tertiary);
}

.btn:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
}

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

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

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

/* Button Groups — EXACT uniform spacing */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 12px; /* FIXED - 12px gap between all buttons */
  margin-top: 24px; /* FIXED - 24px top margin */
  margin-bottom: 0;
  align-items: center;
  width: 100%; /* Ensure group takes full width of container */
  max-width: 100%; /* Prevent overflow */
}

/* All buttons in groups have ZERO margin */
.btn-group .btn {
  margin: 0 !important;
  min-width: auto;
  width: auto;
  max-width: 100%; /* Ensure buttons don't overflow container */
  flex: 0 1 auto; /* Allow buttons to shrink if needed */
}

/* Single button in group */
.btn-group .btn:only-child {
  width: auto;
  min-width: auto;
}

/* Button groups in text-center */
.text-center.btn-group,
.btn-group.text-center {
  justify-content: center;
}

/* Buttons in paragraphs — convert to btn-group pattern */
p .btn {
  margin-top: 24px; /* FIXED */
  margin-bottom: 0;
  display: inline-flex;
}

/* When multiple buttons in paragraph */
p:has(.btn + .btn) {
  display: flex;
  flex-wrap: wrap;
  gap: 12px; /* FIXED */
  align-items: center;
}

p:has(.btn + .btn) .btn {
  margin: 0 !important;
}

/* Single button spacing in paragraphs */
.content-block__body > p:has(.btn:only-child) {
  margin-top: 24px; /* FIXED */
  margin-bottom: 0;
}

/* Mobile: ensure buttons stack properly with uniform spacing */
@media (max-width: 768px) {
  .btn-group {
    flex-direction: column;
    gap: 12px !important; /* FIXED - same gap */
  }
  
  .btn-group .btn {
    width: 100%;
    padding: 12px 24px !important; /* EXACT - same padding */
    min-height: 44px !important; /* FIXED */
  }
  
  /* Hero buttons should not stretch on mobile */
  .hero-foreground .btn-group .btn {
    width: auto !important;
    min-width: auto !important;
    padding: 12px 24px !important; /* EXACT - same padding */
    min-height: 44px !important; /* FIXED */
  }
  
  /* Buttons in paragraphs on mobile */
  p .btn {
    display: inline-flex;
    width: auto;
    margin-left: 0;
    margin-right: 0;
    margin-top: 24px !important; /* FIXED */
    margin-bottom: 0;
    padding: 12px 24px !important; /* EXACT */
    min-height: 44px !important; /* FIXED */
  }
  
  p .btn + .btn {
    margin-left: 0;
  }
}

/* ==========================================================================
   10. TABLES — Functional Data Display
   ========================================================================== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-md) 0;
  font-size: var(--font-size-base);
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: var(--border-width) solid var(--color-border);
}

th {
  font-weight: var(--font-weight-semibold);
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
}

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

/* ==========================================================================
   11. FORMS — Functional Inputs
   ========================================================================== */
input[type="text"],
input[type="email"],
input[type="tel"],
input[type="url"],
input[type="search"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-sm);
  font-size: var(--font-size-base);
  font-family: var(--font-body);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  border: var(--border-width) solid var(--color-border);
  border-radius: 0; /* No decorative rounding */
}

input:focus,
textarea:focus,
select:focus {
  outline: var(--focus-outline);
  outline-offset: var(--focus-outline-offset);
  border-color: var(--color-brand);
}

label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
}

/* ==========================================================================
   12. UTILITIES — Functional Helpers
   ========================================================================== */
.text-center {
  text-align: center;
}

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

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

.hide {
  display: none !important;
}

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

/* ==========================================================================
   13. GRID — Modular Layout
   ========================================================================== */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

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

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

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

.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ==========================================================================
   14. FOOTER — Functional, Clear
   ========================================================================== */
.site-footer {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl) var(--container-padding);
  background-color: var(--color-bg-secondary);
  border-top: var(--border-width-strong) solid var(--color-border-strong);
}

.site-footer__content {
  max-width: var(--container-max-width);
  margin: 0 auto;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  list-style: none;
  margin: var(--spacing-md) 0;
  padding: 0;
}

.site-footer__link {
  color: var(--color-text-secondary);
  text-decoration: underline;
  font-size: var(--font-size-sm);
}

.site-footer__link:hover {
  color: var(--color-brand);
}

/* ==========================================================================
   15. RESPONSIVE — Mobile-First, Functional
   ========================================================================== */
@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --section-spacing: 1.5rem;
    --module-spacing: 1rem;
  }
  
  h1 {
    font-size: var(--font-size-3xl);
  }
  
  h2 {
    font-size: var(--font-size-2xl);
  }
  
  h3 {
    font-size: var(--font-size-xl);
  }
  
  .nav-primary {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    position: relative;
  }
  
  .nav-primary__toggle {
    display: flex;
  }
  
  .nav-primary__menu {
    display: none;
    flex-direction: column;
    width: 100%;
    margin-top: var(--spacing-md);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-bg-primary);
    border-top: var(--border-width) solid var(--color-border);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    padding: var(--spacing-md);
  }
  
  .nav-primary__menu[aria-hidden="false"] {
    display: flex !important;
  }
  
  .nav-primary__menu[aria-hidden="true"] {
    display: none !important;
  }
  
  .nav-primary__item {
    width: 100%;
  }
  
  .nav-primary__link {
    width: 100%;
    padding: var(--spacing-sm);
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   16. PRINT — Functional Print Styles
   ========================================================================== */
@media print {
  .site-header,
  .nav-secondary,
  .nav-tertiary,
  .site-footer,
  .btn {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  a {
    color: black;
    text-decoration: underline;
  }
  
  .content-block {
    border: none;
    page-break-inside: avoid;
  }
}

/* ==========================================================================
   17. ANIMATIONS — Subtle Entrance Effects
   ========================================================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger animation delays for sequential content blocks */
.content-block:nth-child(1) { animation-delay: 0ms; }
.content-block:nth-child(2) { animation-delay: 50ms; }
.content-block:nth-child(3) { animation-delay: 100ms; }
.content-block:nth-child(4) { animation-delay: 150ms; }
.content-block:nth-child(5) { animation-delay: 200ms; }
.content-block:nth-child(6) { animation-delay: 250ms; }
.content-block:nth-child(7) { animation-delay: 300ms; }
.content-block:nth-child(8) { animation-delay: 350ms; }
.content-block:nth-child(9) { animation-delay: 400ms; }
.content-block:nth-child(10) { animation-delay: 450ms; }

/* ==========================================================================
   18. ACCESSIBILITY — WCAG AAA Compliance
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  /* Disable entrance animations for reduced motion */
  .content-block {
    animation: none !important;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-border: #000000;
    --color-border-strong: #000000;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f0f0f0;
  }
  
  .btn {
    border-width: 2px;
  }
}

/* ==========================================================================
   19. CONTACT BOTTOM SHEET — iOS-style Action Sheet
   ========================================================================== */
.contact-sheet {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  display: flex;
  align-items: flex-end;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-functional);
}

.contact-sheet[aria-hidden="false"] {
  pointer-events: auto;
}

.contact-sheet--open {
  opacity: 1;
}

.contact-sheet__backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}

.contact-sheet__content {
  position: relative;
  width: 100%;
  max-width: 100%;
  background-color: var(--color-bg-primary);
  border-top-left-radius: var(--spacing-16);
  border-top-right-radius: var(--spacing-16);
  padding: var(--spacing-8) var(--spacing-16) var(--spacing-32);
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.15);
  transform: translateY(100%);
  transition: transform var(--duration-base) var(--ease-out);
  max-height: 80vh;
  overflow-y: auto;
}

.contact-sheet--open .contact-sheet__content {
  transform: translateY(0);
}

.contact-sheet__handle {
  width: 40px;
  height: 4px;
  background-color: var(--color-border);
  border-radius: 2px;
  margin: 0 auto var(--spacing-16);
}

.contact-sheet__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--spacing-16) 0;
  text-align: center;
}

.contact-sheet__options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
  margin-bottom: var(--spacing-16);
}

.contact-sheet__option {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-16);
  background-color: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--spacing-8);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  cursor: pointer;
  transition: background-color var(--duration-fast) var(--ease-functional),
              border-color var(--duration-fast) var(--ease-functional);
  text-align: center;
  min-height: 48px;
}

.contact-sheet__option:hover:not(:disabled) {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-brand);
}

.contact-sheet__option:active:not(:disabled) {
  background-color: var(--color-bg-tertiary);
}

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

.contact-sheet__option-hint {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--spacing-4);
  font-weight: var(--font-weight-normal);
}

.contact-sheet__fallback {
  text-align: center;
  padding-top: var(--spacing-16);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

.contact-sheet__fallback a {
  color: var(--color-brand);
  text-decoration: underline;
}

.contact-sheet__fallback a:hover {
  color: var(--color-brand-hover);
}

@media (min-width: 640px) {
  .contact-sheet__content {
    max-width: 400px;
    margin: 0 auto;
    border-radius: var(--spacing-16);
    border-top-left-radius: var(--spacing-16);
    border-top-right-radius: var(--spacing-16);
  }
}

/* ==========================================================================
   END W3C Functional Authority Design System
   ========================================================================== */