/*
Theme Name: Fluid Institutions
Theme URI: https://fluidinstitutions.org
Author: Dr. [Author Name]
Author URI: https://fluidinstitutions.org
Description: A professional academic research platform for presenting scholarly work on institutional innovation in the Global South. Features comprehensive citation management, interactive visualizations, and academic credibility signals.
Version: 1.0.2
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: fluid-institutions
Tags: academic, research, citations, scholarly, professional
*/

/* ==========================================================================
   ACADEMIC DESIGN SYSTEM - Fluid Institutions
   ========================================================================== */

/* 
   TABLE OF CONTENTS
   1. CSS Variables (Design Tokens)
   2. Typography System
   3. Base Styles
   4. Layout Grid
   5. Academic Components
   6. Citation System
   7. Figures & Tables
   8. Navigation
   9. Responsive Design
   10. Print Styles
*/

/* ==========================================================================
   1. CSS VARIABLES - Design Tokens
   ========================================================================== */

:root {
  /* Colors - Academic Palette */
  --color-primary: #1a3a52;
  /* Deep academic blue */
  --color-secondary: #5d737e;
  /* Muted gray-blue */
  --color-accent: #c17767;
  /* Warm terracotta */
  --color-background: #fefefe;
  /* Off-white */
  --color-surface: #ffffff;
  /* Pure white */
  --color-text-primary: #2c3e50;
  /* Dark gray-blue */
  --color-text-secondary: #7f8c8d;
  /* Light gray */
  --color-citation: #95a5a6;
  /* Citation gray */
  --color-link: #3498db;
  /* Academic blue */
  --color-link-hover: #2980b9;
  /* Darker blue */
  --color-border: #ecf0f1;
  /* Light border */

  /* Typography - Academic Fonts */
  --font-heading: 'Playfair Display', 'Georgia', serif;
  --font-body: 'Source Serif Pro', 'Crimson Text', serif;
  --font-ui: 'Inter', 'Open Sans', sans-serif;
  --font-code: 'Fira Code', 'Courier New', monospace;

  /* Font Sizes - Modular Scale (1.25 ratio) */
  --text-xs: 0.75rem;
  /* 12px */
  --text-sm: 0.875rem;
  /* 14px */
  --text-base: 1rem;
  /* 16px */
  --text-lg: 1.125rem;
  /* 18px */
  --text-xl: 1.25rem;
  /* 20px */
  --text-2xl: 1.563rem;
  /* 25px */
  --text-3xl: 1.953rem;
  /* 31px */
  --text-4xl: 2.441rem;
  /* 39px */
  --text-5xl: 3.052rem;
  /* 49px */

  /* Spacing - 8px base grid */
  --space-1: 0.5rem;
  /* 8px */
  --space-2: 1rem;
  /* 16px */
  --space-3: 1.5rem;
  /* 24px */
  --space-4: 2rem;
  /* 32px */
  --space-5: 3rem;
  /* 48px */
  --space-6: 4rem;
  /* 64px */
  --space-7: 6rem;
  /* 96px */

  /* Layout */
  --content-width: 900px;
  --wide-width: 1200px;
  --sidebar-width: 280px;
  --reading-line-height: 1.75;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.08);

  /* Transitions */
  --transition-base: 200ms ease-in-out;
  --transition-slow: 400ms ease-in-out;
}

/* ==========================================================================
   2. TYPOGRAPHY SYSTEM
   ========================================================================== */

/* Import Academic Fonts */
@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@400;600;700&family=Source+Serif+Pro:wght@400;600;700&family=Inter:wght@400;500;600&display=swap');

/* Base Typography - Fluid Responsive */
body {
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.5vw + 0.875rem, 1.125rem);
  /* 16px -> 18px */
  line-height: var(--reading-line-height);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Headings - Academic Style */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  line-height: 1.3;
  font-weight: 700;
  color: var(--color-primary);
  margin-top: var(--space-5);
  margin-bottom: var(--space-3);
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3.052rem);
  /* 32px -> 49px */
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 2.5vw + 1rem, 2.441rem);
  /* 24px -> 39px */
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--space-2);
}

h3 {
  font-size: clamp(1.25rem, 2vw + 0.75rem, 1.953rem);
  /* 20px -> 31px */
  font-weight: 600;
}

h4 {
  font-size: clamp(1.125rem, 1.5vw + 0.75rem, 1.563rem);
  /* 18px -> 25px */
  font-weight: 600;
}

h5 {
  font-size: clamp(1rem, 1vw + 0.75rem, 1.25rem);
  /* 16px -> 20px */
  font-weight: 600;
}

h6 {
  font-size: var(--text-lg);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-secondary);
}

/* Paragraphs - Academic Spacing */
p {
  margin-bottom: var(--space-3);
  max-width: 75ch;
  /* Optimal reading width */
}

/* First paragraph after heading */
h1+p,
h2+p,
h3+p {
  margin-top: 0;
}

/* Lead paragraphs (abstracts, intros) */
.lead {
  font-size: var(--text-xl);
  line-height: 1.6;
  color: var(--color-secondary);
  font-weight: 400;
}

/* Links */
a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-base);
  border-bottom: 1px solid transparent;
}

a:hover {
  color: var(--color-link-hover);
  border-bottom-color: var(--color-link-hover);
}

/* Lists */
ul,
ol {
  margin-bottom: var(--space-3);
  padding-left: var(--space-4);
}

li {
  margin-bottom: var(--space-1);
}

/* Blockquotes - Academic Citation Style */
blockquote {
  margin: var(--space-4) 0;
  padding-left: var(--space-4);
  border-left: 4px solid var(--color-accent);
  font-style: italic;
  color: var(--color-secondary);
  font-size: var(--text-lg);
}

blockquote cite {
  display: block;
  margin-top: var(--space-2);
  font-style: normal;
  font-size: var(--text-base);
  font-family: var(--font-ui);
  color: var(--color-text-secondary);
}

/* Code - Monospace */
code {
  font-family: var(--font-code);
  font-size: 0.9em;
  background-color: var(--color-border);
  padding: 0.2em 0.4em;
  border-radius: 3px;
}

pre code {
  display: block;
  padding: var(--space-3);
  overflow-x: auto;
  line-height: 1.5;
}

/* Emphasis */
strong,
b {
  font-weight: 700;
  color: var(--color-primary);
}

em,
i {
  font-style: italic;
}

/* Small text (captions, metadata) */
small {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ==========================================================================
   3. BASE STYLES
   ========================================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Selection */
::selection {
  background-color: var(--color-accent);
  color: white;
}

/* Focus styles */
:focus {
  outline: 2px solid var(--color-link);
  outline-offset: 2px;
}

/* ==========================================================================
   4. LAYOUT GRID - Academic Journal Style
   ========================================================================== */

.site {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

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

.site-main {
  flex: 1;
  padding: var(--space-5) 0;
}

.site-footer {
  background: linear-gradient(135deg, #1a3a52 0%, #0f2537 100%);
  color: #e2e8f0;
  padding: 0;
  margin-top: var(--space-7);
  border-top: 4px solid #3b82f6;
}

/* Footer Grid Layout */
.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3rem;
  padding: 4rem 0 3rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-column {
  display: flex;
  flex-direction: column;
}

/* Footer Headings */
.footer-heading {
  font-family: 'Playfair Display', serif;
  font-size: 1.25rem;
  color: #ffffff;
  margin: 0 0 1.5rem 0;
  font-weight: 600;
}

.footer-about .footer-heading {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* Footer Description */
.footer-description {
  font-size: 0.95rem;
  line-height: 1.6;
  color: #cbd5e1;
  margin-bottom: 1.5rem;
  max-width: 90%;
}

/* Footer Menus */
.footer-menu {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-menu li {
  margin-bottom: 0.75rem;
}

.footer-menu a {
  color: #cbd5e1;
  text-decoration: none;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  display: inline-block;
  position: relative;
}

.footer-menu a::before {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: #3b82f6;
  transition: width 0.3s ease;
}

.footer-menu a:hover {
  color: #ffffff;
  padding-left: 8px;
}

.footer-menu a:hover::before {
  width: 100%;
}

/* Footer Text */
.footer-text {
  font-size: 0.9rem;
  line-height: 1.6;
  color: #cbd5e1;
  margin-bottom: 1.5rem;
}

/* Footer CTA Button */
.footer-cta-btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background-color: #3b82f6;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  text-align: center;
  max-width: fit-content;
}

.footer-cta-btn:hover {
  background-color: #2563eb;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Footer Bottom Bar */
.footer-bottom {
  background-color: rgba(0, 0, 0, 0.2);
  padding: 1.5rem 0;
}

.footer-bottom-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.copyright {
  margin: 0;
  font-size: 0.9rem;
  color: #94a3b8;
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.85rem;
}

.footer-bottom-links a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-bottom-links a:hover {
  color: #ffffff;
}

.footer-bottom-links .separator {
  color: #64748b;
}

/* Responsive Footer */
@media (max-width: 968px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    padding: 3rem 0 2rem 0;
  }
}

@media (max-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .footer-bottom-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-bottom-links {
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer-description {
    max-width: 100%;
  }
}


/* Container */
.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

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

/* Academic two-column layout (content + sidebar TOC) */
.academic-layout {
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: var(--space-5);
  max-width: var(--wide-width);
  margin: 0 auto;
}

/* ==========================================================================
   5. ACADEMIC COMPONENTS
   ========================================================================== */

/* Page Title - Research Paper Style */
.page-title,
.research-title {
  font-size: var(--text-5xl);
  line-height: 1.2;
  margin-bottom: var(--space-3);
  text-align: left;
  max-width: 100%;
}

/* Author Meta Grid */
.author-meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-3);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
  padding: var(--space-4);
  background-color: rgba(236, 240, 241, 0.3);
  border-radius: 8px;
  border: 1px solid var(--color-border);
}

.meta-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.meta-label {
  font-weight: 600;
  color: var(--color-secondary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.author-name {
  font-weight: 600;
  color: var(--color-primary);
  font-size: var(--text-base);
}

.author-affiliation {
  font-style: italic;
  color: var(--color-text-primary);
}

.publication-date,
.view-count,
.version {
  color: var(--color-text-primary);
}

/* Table of Contents Styling */
.table-of-contents {
  position: sticky;
  top: 100px;
  background: white;
  padding: var(--space-4);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.table-of-contents h3 {
  font-size: var(--text-lg);
  margin-top: 0;
  margin-bottom: var(--space-3);
  border: none;
  padding-bottom: var(--space-2);
  border-bottom: 2px solid var(--color-border);
  color: var(--color-primary);
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-list li {
  margin-bottom: var(--space-1);
}

.toc-link {
  display: block;
  padding: var(--space-2);
  border-left: 3px solid transparent;
  transition: all var(--transition-base);
  border-radius: 4px;
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  text-decoration: none;
}

.toc-link:hover {
  border-left-color: var(--color-link);
  background-color: rgba(52, 152, 219, 0.05);
  padding-left: calc(var(--space-2) + 4px);
  border-bottom: none;
}

.toc-link.active {
  border-left-color: var(--color-primary);
  background-color: rgba(26, 58, 82, 0.05);
  font-weight: 600;
  color: var(--color-primary);
}

.toc-sub {
  margin-left: var(--space-3);
  font-size: var(--text-xs);
}

.toc-sub .toc-link {
  padding: var(--space-1) var(--space-2);
}

/* Responsive: TOC below content on mobile */
@media (max-width: 968px) {
  .academic-layout {
    grid-template-columns: 1fr;
  }

  .table-of-contents {
    position: static;
    order: -1;
    margin-bottom: var(--space-4);
  }

  .author-meta-grid {
    grid-template-columns: 1fr;
  }
}

/* Abstract Box */
.abstract {
  background-color: var(--color-border);
  padding: var(--space-4);
  margin: var(--space-5) 0;
  border-left: 4px solid var(--color-primary);
}

.abstract h2 {
  font-size: var(--text-xl);
  margin-top: 0;
  margin-bottom: var(--space-2);
  border: none;
}

.abstract p {
  font-size: var(--text-base);
  line-height: 1.6;
}

/* Section Dividers */
.section-divider {
  border: none;
  border-top: 2px solid var(--color-border);
  margin: var(--space-6) 0;
}

/* Keywords */
.keywords {
  margin: var(--space-3) 0;
  font-family: var(--font-ui);
}

.keyword-tag {
  display: inline-block;
  background-color: var(--color-border);
  color: var(--color-primary);
  padding: 0.25rem 0.75rem;
  margin: 0.25rem;
  border-radius: 20px;
  font-size: var(--text-sm);
  font-weight: 500;
}

/* To be continued... */

/* ==========================================================================
   6. CITATION SYSTEM STYLES
   ========================================================================== */

/* Inline Citation */
.citation {
  color: var(--color-link);
  font-size: 0.95em;
  cursor: help;
  border-bottom: 1px dotted var(--color-link);
}

.citation:hover {
  color: var(--color-link-hover);
  border-bottom-style: solid;
}

/* References Section */
.references {
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 3px solid var(--color-primary);
}

.reference-item {
  margin-bottom: var(--space-3);
  padding-left: var(--space-4);
  text-indent: calc(-1 * var(--space-4));
}

/* ==========================================================================
   7. FIGURES & TABLES
   ========================================================================== */

.figure {
  margin: var(--space-5) 0;
  text-align: center;
}

.figure img {
  max-width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
}

.figure-caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-4) 0;
}

thead {
  background-color: var(--color-primary);
  color: white;
}

th,
td {
  padding: var(--space-2);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

tr:nth-child(even) {
  background-color: rgba(236, 240, 241, 0.3);
}

/* ==========================================================================
   RESEARCH PAPER TEMPLATE STYLES
   ========================================================================== */

.research-article {
  max-width: var(--wide-width);
  margin: 0 auto;
}

.research-header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 2px solid var(--color-border);
}

.research-actions {
  margin-top: var(--space-3);
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
}

.btn {
  padding: var(--space-2) var(--space-3);
  border-radius: 4px;
  font-family: var(--font-ui);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  display: inline-block;
  border: none;
}

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

.btn-primary:hover {
  background-color: var(--color-link-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

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

.orcid-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: var(--space-2);
}

.research-stats {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-3);
  font-family: var(--font-ui);
  color: var(--color-text-secondary);
}

.related-research {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background-color: var(--color-border);
  border-radius: 4px;
}

.related-research ul {
  list-style: none;
  padding: 0;
}

.related-research li {
  margin-bottom: var(--space-2);
}

/* ==========================================================================
   CASE STUDY TEMPLATE STYLES
   ========================================================================== */

.case-study-article {
  max-width: var(--content-width);
  margin: 0 auto;
}

.featured-image {
  margin-bottom: var(--space-4);
  border-radius: 4px;
  overflow: hidden;
}

.case-study-meta {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin: var(--space-3) 0;
  font-family: var(--font-ui);
}

.case-study-meta span {
  padding: 0.5rem 1rem;
  background-color: var(--color-border);
  border-radius: 4px;
}

.case-study-summary {
  background-color: rgba(26, 58, 82, 0.05);
  padding: var(--space-4);
  border-left: 4px solid var(--color-primary);
  margin: var(--space-4) 0;
}

.key-findings {
  background-color: rgba(193, 119, 103, 0.1);
  padding: var(--space-4);
  border-radius: 4px;
  margin: var(--space-5) 0;
}

.back-link {
  display: inline-block;
  margin-top: var(--space-5);
  padding: var(--space-2) var(--space-3);
  background-color: var(--color-border);
  border-radius: 4px;
  font-family: var(--font-ui);
}

/* ==========================================================================
   SITE BRANDING & NAVIGATION
   ========================================================================== */

/* Site Branding */
.site-branding {
  flex: 0 0 auto;
}

.site-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
}

.site-title a {
  color: var(--color-primary);
  text-decoration: none;
  border: none;
}

.site-title a:hover {
  color: var(--color-link);
  border: none;
}

.site-description {
  margin: var(--space-1) 0 0 0;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  font-weight: 400;
}

/* Main Navigation */
.main-navigation {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.primary-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-3);
  align-items: center;
}

.primary-menu li {
  margin: 0;
  padding: 0;
}

.primary-menu a {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-primary);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: 4px;
  transition: all var(--transition-base);
  border: none;
}

.primary-menu a:hover,
.primary-menu .current-menu-item a,
.primary-menu .current_page_item a {
  color: var(--color-link);
  background-color: rgba(52, 152, 219, 0.1);
  border: none;
}

/* Dropdown menus */
.primary-menu .sub-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  box-shadow: var(--shadow-md);
  border-radius: 4px;
  padding: var(--space-2);
  min-width: 200px;
  list-style: none;
  z-index: 1000;
}

.primary-menu li {
  position: relative;
}

.primary-menu li:hover>.sub-menu {
  display: block;
}

.primary-menu .sub-menu li {
  display: block;
  margin: 0;
}

.primary-menu .sub-menu a {
  display: block;
  padding: var(--space-2);
}

/* Responsive Navigation */
@media (max-width: 768px) {
  .site-header .container {
    flex-direction: column;
    gap: var(--space-3);
  }

  .main-navigation {
    justify-content: center;
    width: 100%;
  }

  .primary-menu {
    flex-wrap: wrap;
    justify-content: center;
  }
}

/* ==========================================================================
   FOOTER STYLES
   ========================================================================== */

.site-footer {
  background: var(--color-primary);
  color: white;
  padding: var(--space-6) 0 var(--space-4) 0;
  margin-top: var(--space-7);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr auto;
  gap: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--space-4);
}

.footer-branding h3 {
  color: white;
  font-size: var(--text-2xl);
  margin: 0 0 var(--space-2) 0;
  font-family: var(--font-heading);
}

.footer-branding p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
}

.footer-navigation {
  display: flex;
  align-items: center;
}

.footer-menu {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-menu a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-family: var(--font-ui);
  transition: color var(--transition-base);
  border: none;
}

.footer-menu a:hover {
  color: white;
  border: none;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  transition: color var(--transition-base);
  border: none;
}

.footer-links a:hover {
  color: white;
  border: none;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--text-sm);
  font-family: var(--font-ui);
  opacity: 0.8;
}

.footer-bottom p {
  margin: 0;
}

.footer-bottom a {
  color: white;
  text-decoration: underline;
  border: none;
}

.footer-bottom a:hover {
  opacity: 0.8;
  border: none;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }
}

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

/* Skip to content link - appears on keyboard focus */
.skip-link {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
  background: var(--color-primary);
  color: white;
  padding: var(--space-2) var(--space-3);
  text-decoration: none;
  font-family: var(--font-ui);
  font-weight: 600;
  z-index: 100000;
}

.skip-link:focus {
  position: fixed;
  top: var(--space-2);
  left: var(--space-2);
  width: auto;
  height: auto;
  clip: auto;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* Screen reader only text */
.screen-reader-text {
  position: absolute;
  left: -10000px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.screen-reader-text:focus {
  position: static;
  width: auto;
  height: auto;
  clip: auto;
}

/* Focus visible for keyboard navigation */
*:focus-visible {
  outline: 3px solid var(--color-link);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Improve button/link touch targets for mobile (min 44x44px WCAG) */
button,
a,
input[type="submit"],
input[type="button"] {
  min-height: 44px;
  min-width: 44px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-text-primary: #000000;
    --color-background: #ffffff;
    --color-border: #000000;
  }
}

/* Reduced motion for users who prefer it */
@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;
  }
}

/* Ensure sufficient color contrast */
.stat-detail {
  opacity: 0.9;
  /* Improved from 0.85 for WCAG AA compliance (4.7:1 ratio) */
}

/* ARIA live regions */
[aria-live="polite"],
[aria-live="assertive"] {
  position: relative;
}

/* ==========================================================================
   RESPONSIVE MOBILE NAVIGATION
   ========================================================================== */

/* Hamburger Menu Toggle Button */
.menu-toggle {
  display: none;
  /* Hidden on desktop */
  position: relative;
  z-index: 1000;
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
  order: 3;
  /* Position after branding and nav */
}

.menu-toggle-icon {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 21px;
}

.menu-bar {
  display: block;
  height: 3px;
  width: 100%;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all 0.3s ease-in-out;
}

/* Hamburger animation when menu is open */
.menu-open .menu-toggle .menu-bar:nth-child(1) {
  transform: translateY(9px) rotate(45deg);
}

.menu-open .menu-toggle .menu-bar:nth-child(2) {
  opacity: 0;
}

.menu-open .menu-toggle .menu-bar:nth-child(3) {
  transform: translateY(-9px) rotate(-45deg);
}

/* Mobile navigation styles */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

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

  .site-branding {
    flex: 1;
  }

  .main-navigation {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-surface);
    box-shadow: -4px 0 12px rgba(0, 0, 0, 0.1);
    transition: right 0.3s ease-in-out;
    z-index: 999;
    overflow-y: auto;
    padding: var(--space-6) var(--space-4) var(--space-4) var(--space-4);
  }

  .menu-open .main-navigation {
    right: 0;
  }

  /* Overlay when menu is open */
  .menu-open::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
  }

  /* Prevent body scroll when menu is open */
  body.menu-open {
    overflow: hidden;
  }

  /* Mobile menu list */
  .primary-menu {
    display: flex;
    flex-direction: column;
    gap: 0;
    padding: 0;
    margin: 0;
  }

  .primary-menu li {
    border-bottom: 1px solid var(--color-border);
  }

  .primary-menu a {
    display: block;
    padding: var(--space-3) 0;
    color: var(--color-text-primary);
    text-decoration: none;
    font-family: var(--font-ui);
    font-size: var(--text-lg);
    transition: color 0.2s ease;
  }

  .primary-menu a:hover,
  .primary-menu a:focus {
    color: var(--color-link);
    background: transparent;
  }

  .primary-menu .current-menu-item>a {
    color: var(--color-link);
    font-weight: 600;
  }

  /* Submenu styling for mobile */
  .primary-menu .sub-menu {
    display: none;
    padding-left: var(--space-3);
    margin: 0;
  }

  .primary-menu .submenu-open>.sub-menu {
    display: block;
  }

  .submenu-toggle {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
    color: var(--color-text-secondary);
  }

  .submenu-toggle[aria-expanded="true"] .submenu-icon {
    transform: rotate(180deg);
  }

  .submenu-icon {
    display: inline-block;
    transition: transform 0.3s ease;
    font-size: 0.75rem;
  }

  .menu-item-has-children {
    position: relative;
  }

  .primary-menu .sub-menu li {
    border-bottom: none;
  }

  .primary-menu .sub-menu a {
    padding: var(--space-2) 0;
    font-size: var(--text-base);
    color: var(--color-text-secondary);
  }
}

/* Desktop navigation remains horizontal */
@media (min-width: 769px) {
  .main-navigation {
    display: flex;
    align-items: center;
  }

  .primary-menu {
    display: flex;
    flex-direction: row;
    gap: var(--space-4);
    align-items: center;
  }

  .submenu-toggle {
    display: none;
    /* Not needed on desktop */
  }
}

/* ==========================================================================
   COMPREHENSIVE MOBILE BREAKPOINTS
   ========================================================================== */

/* Extra Small Devices (320px - 480px) */
@media (max-width: 480px) {
  :root {
    --space-6: 3rem;
    /* Reduce large spacing on tiny screens */
    --space-7: 4rem;
  }

  .container {
    padding-left: var(--space-2);
    padding-right: var(--space-2);
  }

  .site-header .container {
    padding: var(--space-2);
  }

  .site-title {
    font-size: var(--text-lg);
  }

  .site-description {
    font-size: var(--text-sm);
  }
}

/* Small Devices - Mobile Portrait (481px - 767px) */
@media (min-width: 481px) and (max-width: 767px) {
  .container {
    max-width: 100%;
    padding-left: var(--space-3);
    padding-right: var(--space-3);
  }
}

/* Medium Devices - Tablets (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
  .container {
    max-width: 720px;
  }

  /* Two-column layouts become single column on tablets */
  .stats-grid,
  .updates-grid,
  .case-studies-carousel {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .framework-preview {
    max-width: 500px;
    margin: 0 auto;
  }
}

/* Large Devices - Desktop (1025px - 1280px) */
@media (min-width: 1025px) and (max-width: 1280px) {
  .container {
    max-width: 960px;
  }
}

/* Extra Large Devices - Wide Desktop (1281px+) */
@media (min-width: 1281px) {
  .container {
    max-width: 1200px;
  }
}

/* Mobile-specific improvements */
@media (max-width: 768px) {

  /* Typography adjustments */
  body {
    font-size: 1rem;
    line-height: 1.6;
  }

  /* Hero section mobile */
  .hero-title {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
    line-height: 1.2;
  }

  .hero-subtitle {
    font-size: 1.125rem;
    line-height: 1.5;
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: var(--space-4) var(--space-2);
  }

  .hero-cta {
    flex-direction: column;
    gap: var(--space-2);
  }

  .cta-btn {
    width: 100%;
    text-align: center;
    font-size: 1rem;
    padding: 1rem 2rem;
  }

  /* Stats section mobile */
  .stats-section {
    padding: var(--space-5) var(--space-2);
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .stat-number {
    font-size: 3rem;
  }

  /* Framework section mobile */
  .framework-section {
    margin: var(--space-5) auto;
    padding: 0 var(--space-2);
  }

  .framework-pillars {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .pillar-card {
    padding: var(--space-3);
  }

  /* Case studies mobile */
  .case-studies-section {
    padding: var(--space-5) var(--space-2);
  }

  .case-studies-carousel {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  /* Paradox section mobile */
  .paradox-section {
    margin: var(--space-5) var(--space-2);
    padding: var(--space-4) var(--space-2);
  }

  .paradox-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .paradox-arrow {
    transform: rotate(90deg);
    text-align: center;
  }

  /* Updates section mobile */
  .updates-section {
    margin: var(--space-5) auto;
    padding: 0 var(--space-2);
  }

  .updates-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  /* Final CTA mobile */
  .final-cta {
    padding: var(--space-5) var(--space-2);
  }

  .final-cta-buttons {
    flex-direction: column;
    gap: var(--space-2);
  }

  .cta-btn.large-primary,
  .cta-btn.large-secondary {
    width: 100%;
    font-size: 1rem;
  }

  /* Tables responsive */
  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  /* Forms responsive */
  input[type="text"],
  input[type="email"],
  input[type="search"],
  textarea {
    width: 100%;
    font-size: 16px;
    /* Prevent zoom on iOS */
  }

  /* Images responsive */
  img {
    max-width: 100%;
    height: auto;
  }

  /* Video embeds responsive */
  iframe,
  embed,
  object {
    max-width: 100%;
  }
}

/* Tablet landscape improvements */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {
  .hero-section {
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-4);
  }

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

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

/* Print styles */
@media print {

  .menu-toggle,
  .main-navigation,
  .hero-cta,
  .final-cta,
  .skip-link {
    display: none !important;
  }

  body {
    font-size: 12pt;
    line-height: 1.5;
    color: #000;
    background: #fff;
  }

  a {
    text-decoration: underline;
    color: #000;
  }

  a[href^="http"]:after {
    content: " (" attr(href) ")";
  }
}