/* CSS Landing Page Design System - Government of Data Course */
/* Developed by Deivid Chipana */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&display=swap');

:root {
  /* Dark Theme Variable Tokens */
  --bg-main: #060913;
  --bg-navbar: rgba(10, 15, 30, 0.8);
  --bg-card: #0f172a;
  --bg-card-hover: #1e293b;
  --border-color: #1e293b;
  --border-glow: #334155;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #64748b;
  
  --accent-primary: #6366f1; /* Indigo */
  --accent-secondary: #8b5cf6; /* Purple */
  --accent-glow: rgba(99, 102, 241, 0.12);
  --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  --accent-gradient-text: linear-gradient(90deg, #818cf8, #a78bfa);
  
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.08);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.08);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.08);
  --info: #0ea5e9;
  --info-bg: rgba(14, 165, 233, 0.08);
  
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 10px 20px rgba(0,0,0,0.15);
  --shadow-lg: 0 20px 40px rgba(0,0,0,0.3);
  --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.2);
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --border-radius-sm: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 20px;
  --border-radius-full: 9999px;
  
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;
  
  --max-width: 1200px;
}

/* Light Theme Variable Tokens */
[data-theme="light"] {
  --bg-main: #f3f4f6;
  --bg-navbar: rgba(255, 255, 255, 0.85);
  --bg-card: #ffffff;
  --bg-card-hover: #f9fafb;
  --border-color: #e5e7eb;
  --border-glow: #cbd5e1;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  
  --accent-primary: #4f46e5;
  --accent-secondary: #7c3aed;
  --accent-glow: rgba(79, 70, 229, 0.06);
  --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  --accent-gradient-text: linear-gradient(90deg, #4f46e5, #7c3aed);
  
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.03);
  --shadow-md: 0 8px 16px rgba(0,0,0,0.05);
  --shadow-lg: 0 16px 32px rgba(0,0,0,0.08);
  --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.12);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--border-radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Container Wrapper */
.section-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Sticky Navbar --- */
.navbar {
  height: 80px;
  position: fixed;
  top: 0; left: 0; right: 0;
  background-color: var(--bg-navbar);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition-normal);
}

.nav-brand {
  display: flex;
  align-items: center;
}

.brand-logo-link {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: var(--border-radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--border-color);
}

.brand-logo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-logo-link:hover .brand-logo {
  transform: scale(1.08) rotate(3deg);
  box-shadow: 0 4px 20px rgba(99, 102, 241, 0.4);
  border-color: var(--accent-primary);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-text h2 {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.2;
}

.brand-text span {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.nav-menu {
  display: flex;
  gap: 32px;
}

.nav-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  transition: var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--accent-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0; width: 0%; height: 2px;
  background: var(--accent-gradient);
  transition: width var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-fast);
}

.theme-toggle-btn:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-glow);
}

/* Navbar Progress Circle Indicator */
.navbar-progress-wrapper {
  display: flex;
  align-items: center;
  gap: 8px;
  background-color: rgba(255,255,255,0.02);
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
  border: 1px solid var(--border-color);
}

.progress-txt {
  font-size: 11px;
  font-weight: 800;
  color: var(--accent-primary);
}

.progress-circle-bg {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--border-color);
  position: relative;
  overflow: hidden;
}

.progress-circle-fill {
  position: absolute;
  top: 0; left: 0; height: 100%; width: 0%;
  background: var(--accent-gradient);
  transition: width 0.4s ease;
}

.mobile-nav-toggle {
  display: none;
}

/* --- Hero Section --- */
.hero-section {
  padding: 160px 0 100px 0;
  position: relative;
  background: radial-gradient(circle at top right, rgba(99, 102, 241, 0.08), transparent 50%),
              radial-gradient(circle at bottom left, rgba(139, 92, 246, 0.05), transparent 50%);
}

.hero-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: var(--border-radius-full);
  background-color: var(--accent-glow);
  border: 1px solid rgba(99, 102, 241, 0.2);
  color: var(--accent-primary);
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1px;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 36px;
  max-width: 580px;
}

/* Hero Quick Stats */
.hero-stats-row {
  display: flex;
  gap: 32px;
  margin-bottom: 36px;
}

.hero-stat-card {
  display: flex;
  flex-direction: column;
}

.hero-stat-card h3 {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 800;
  color: var(--accent-primary);
  line-height: 1.1;
}

.hero-stat-card span {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
}

/* CTA buttons styling */
.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--border-radius-md);
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.cta-btn.primary {
  background: var(--accent-gradient);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(99,102,241,0.3);
}

.cta-btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99,102,241,0.4);
}

.cta-btn.secondary {
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-primary);
}

.cta-btn.secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-2px);
}

.hero-attribution {
  display: flex;
  align-items: center;
  gap: 6px;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

.hero-attribution span {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.hero-attribution strong {
  font-size: 14px;
  color: var(--accent-primary);
}

/* Hero Image & graphic layout */
.hero-media-content {
  display: flex;
  justify-content: center;
  position: relative;
}

.hero-image-wrapper {
  position: relative;
  width: 100%;
  max-width: 440px;
}

.hero-graphic-image {
  width: 100%;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  border: 1px solid var(--border-color);
  position: relative;
  z-index: 2;
  transition: transform var(--transition-normal);
}

.hero-image-wrapper::after {
  content: '';
  position: absolute;
  top: -15px; left: -15px; right: 15px; bottom: 15px;
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius-lg);
  z-index: 1;
}

.floating-glass-card {
  position: absolute;
  z-index: 10;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.05);
  padding: 12px 18px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: floatEffect 5s ease-in-out infinite;
}

.floating-glass-card i {
  font-size: 18px;
}

.floating-glass-card.gcard-1 {
  top: 20px;
  left: -40px;
  color: var(--accent-primary);
}

.floating-glass-card.gcard-2 {
  bottom: 30px;
  right: -30px;
  color: var(--success);
  animation-delay: 2.5s;
}

.floating-glass-card div {
  display: flex;
  flex-direction: column;
}

.floating-glass-card strong {
  font-size: 12.5px;
  color: var(--text-primary);
}

.floating-glass-card span {
  font-size: 10px;
  color: var(--text-muted);
}

@keyframes floatEffect {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* --- Section Titles & Headers --- */
.section-title-wrap {
  text-align: center;
  margin-bottom: 48px;
}

.section-title-wrap.align-left {
  text-align: left;
  margin-bottom: 0;
}

.section-tag {
  font-size: 11px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent-primary);
  letter-spacing: 1.5px;
  display: inline-block;
  margin-bottom: 8px;
}

.section-main-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
}

.section-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  margin-top: 8px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Course Pillars Section --- */
.pillars-section {
  padding: 60px 0;
  background-color: rgba(255,255,255,0.01);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.pillar-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 30px;
  transition: transform var(--transition-normal), border-color var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.pillar-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-primary);
}

.pillar-icon-wrap {
  width: 50px;
  height: 50px;
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: #ffffff;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
}

.pillar-icon-wrap.bg-indigo { background: linear-gradient(135deg, #6366f1, #4f46e5); }
.pillar-icon-wrap.bg-purple { background: linear-gradient(135deg, #a855f7, #7c3aed); }
.pillar-icon-wrap.bg-teal { background: linear-gradient(135deg, #14b8a6, #0d9488); }

.pillar-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.pillar-card p {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Roadmap / Visual Mind Map Layout --- */
.roadmap-section {
  padding: 80px 0;
}

.roadmap-diagram {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: 50px 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
  position: relative;
  box-shadow: var(--shadow-sm);
}

.roadmap-node {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 28px;
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  cursor: pointer;
}

.roadmap-node.central {
  background: var(--accent-gradient);
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  box-shadow: var(--shadow-glow);
  z-index: 10;
}

.roadmap-connectors {
  display: flex;
  justify-content: center;
  gap: 20px;
  width: 100%;
  flex-wrap: wrap;
  position: relative;
}

.roadmap-node.branch {
  background-color: var(--bg-main);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: 14.5px;
  font-weight: 700;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 24px;
  text-align: center;
  min-width: 160px;
  gap: 4px;
}

.roadmap-node.branch:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.roadmap-node.branch .branch-num {
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Border Acent Colors for Branches */
.border-indigo { border-color: #6366f1 !important; }
.border-indigo:hover { background-color: rgba(99, 102, 241, 0.05); }
.border-purple { border-color: #a855f7 !important; }
.border-purple:hover { background-color: rgba(168, 85, 247, 0.05); }
.border-pink { border-color: #ec4899 !important; }
.border-pink:hover { background-color: rgba(236, 72, 153, 0.05); }
.border-teal { border-color: #14b8a6 !important; }
.border-teal:hover { background-color: rgba(20, 184, 166, 0.05); }
.border-amber { border-color: #f59e0b !important; }
.border-amber:hover { background-color: rgba(245, 158, 11, 0.05); }

/* --- Syllabus Section --- */
.syllabus-section {
  padding: 80px 0;
  background-color: rgba(255,255,255,0.01);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.syllabus-control-bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
  gap: 20px;
  flex-wrap: wrap;
}

.syllabus-search-box {
  position: relative;
  width: 360px;
  max-width: 100%;
}

.syllabus-search-box i {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 15px;
}

.syllabus-search-box input {
  width: 100%;
  padding: 14px 16px 14px 44px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: var(--transition-fast);
}

.syllabus-search-box input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.clear-search-icon {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.clear-search-icon.visible {
  opacity: 1;
  pointer-events: auto;
}

.search-results-meta {
  background-color: var(--accent-glow);
  border: 1px solid rgba(99, 102, 241, 0.15);
  border-radius: var(--border-radius-md);
  padding: 12px 20px;
  margin-bottom: 30px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Modules syllabus layouts mapping */
.modules-syllabus-wrapper {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.module-syllabus-block {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  scroll-margin-top: 100px;
}

.module-info-pane {
  position: sticky;
  top: 100px;
  height: max-content;
}

.module-info-pane span {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent-primary);
  letter-spacing: 1px;
}

.module-info-pane h3 {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 800;
  margin: 4px 0 10px 0;
  line-height: 1.25;
}

.module-info-pane p {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.5;
}

.lessons-cards-pane {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

/* Interactive Lesson Cards */
.lesson-interactive-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.lesson-interactive-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-md);
}

.lesson-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.lesson-card-num {
  font-size: 10px;
  font-weight: 800;
  color: var(--accent-primary);
  text-transform: uppercase;
}

.lesson-card-status {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 8px;
  color: transparent;
  transition: var(--transition-fast);
}

.lesson-interactive-card.completed {
  border-color: rgba(16, 185, 129, 0.3);
}

.lesson-interactive-card.completed .lesson-card-status {
  background-color: var(--success);
  border-color: var(--success);
  color: #ffffff;
}

.lesson-card-title {
  font-family: var(--font-heading);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.lesson-card-excerpt {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 18px;
  flex-grow: 1;
}

.lesson-card-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--accent-primary);
  text-transform: uppercase;
  border-top: 1px solid var(--border-light);
  padding-top: 12px;
}

.lesson-card-cta i {
  transition: transform var(--transition-fast);
}

.lesson-interactive-card:hover .lesson-card-cta i {
  transform: translateX(3px);
}

/* --- Resources Download Section (Module 5) --- */
.resources-section {
  padding: 80px 0;
}

.resources-grid-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 60px;
}

.resources-info-column {
  display: flex;
  flex-direction: column;
  gap: 30px;
  position: sticky;
  top: 100px;
  height: max-content;
}

.resources-graphic-wrapper {
  width: 100%;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  background: radial-gradient(circle at center, rgba(139, 92, 246, 0.1), transparent);
}

.resources-graphic-image {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-normal);
}

.resources-graphic-wrapper:hover .resources-graphic-image {
  transform: scale(1.02);
}

.downloads-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Resources Cards */
.resource-horizontal-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 20px;
  display: grid;
  grid-template-columns: 48px 1fr 150px;
  gap: 20px;
  align-items: center;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.resource-horizontal-card:hover {
  border-color: var(--accent-primary);
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.res-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-sm);
  background-color: var(--danger-bg);
  color: var(--danger);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.res-card-body h3 {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 2px;
}

.res-card-body p {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.4;
}

.res-card-action-bar {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
}

.res-size-badge {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--text-muted);
}

.res-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--border-radius-sm);
  background-color: var(--accent-primary);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  transition: var(--transition-fast);
}

.res-download-btn:hover {
  background-color: var(--accent-secondary);
  box-shadow: 0 4px 10px rgba(139, 92, 246, 0.25);
}

/* --- Slide-Over Lesson Details Modal overlay --- */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0,0,0,0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 10000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.lesson-modal {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -45%) scale(0.95);
  width: 90%;
  max-width: 720px;
  max-height: 85vh;
  background-color: var(--bg-navbar);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  z-index: 10001;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
}

.lesson-modal.active {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
  pointer-events: auto;
}

.modal-header {
  padding: 24px 30px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-module-tag {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent-primary);
  letter-spacing: 1px;
}

.modal-lesson-title {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 800;
  margin-top: 2px;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.modal-close-btn:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 30px;
  overflow-y: auto;
  flex-grow: 1;
}

.modal-body::-webkit-scrollbar {
  width: 6px;
}
.modal-body::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

/* Modals card segments layout */
.content-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 20px;
  margin-bottom: 16px;
  position: relative;
}

.card-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
  padding: 2px 8px;
  border-radius: 12px;
  background-color: rgba(255,255,255,0.03);
}

.card-text {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.65;
}

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

/* Accents Borders on modal cards */
.definition-card { border-left: 3px solid var(--accent-primary); }
.definition-card .card-tag { color: var(--accent-primary); background-color: var(--accent-glow); }
.objective-card { border-left: 3px solid var(--success); }
.objective-card .card-tag { color: var(--success); background-color: var(--success-bg); }
.warning-card { border-left: 3px solid var(--warning); }
.warning-card .card-tag { color: var(--warning); background-color: var(--warning-bg); }
.highlight-card { border-left: 3px solid var(--accent-secondary); }
.highlight-card .card-tag { color: var(--accent-secondary); background-color: rgba(139, 92, 246, 0.1); }
.example-card { border-left: 3px solid var(--info); }
.example-card .card-tag { color: var(--info); background-color: var(--info-bg); }
.practice-card { border-left: 3px solid var(--success); }
.practice-card .card-tag { color: var(--success); background-color: var(--success-bg); }
.strategy-card { border-left: 3px solid var(--accent-primary); }
.strategy-card .card-tag { color: var(--accent-primary); background-color: var(--accent-glow); }
.context-card { border-left: 3px solid var(--info); }
.context-card .card-tag { color: var(--info); background-color: var(--info-bg); }
.tacit-card { border-left: 3px solid var(--warning); }
.tacit-card .card-tag { color: var(--warning); background-color: var(--warning-bg); }
.explicit-card { border-left: 3px solid var(--success); }
.explicit-card .card-tag { color: var(--success); background-color: var(--success-bg); }

.styled-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.styled-list li {
  position: relative;
  padding-left: 24px;
  font-size: 14.5px;
  color: var(--text-secondary);
}

.styled-list li::before {
  content: '\f00c';
  font-family: 'Font Awesome 5 Free';
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--success-bg);
  color: var(--success);
  font-size: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-footer {
  padding: 20px 30px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-shrink: 0;
}

.modal-footer-nav {
  display: flex;
  gap: 8px;
}

.modal-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border-radius: var(--border-radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
}

.modal-nav-btn:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-glow);
}

.modal-complete-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--border-radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-card);
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition-fast);
}

.modal-complete-btn:hover {
  border-color: var(--success);
  color: var(--success);
}

.modal-complete-btn.completed {
  background-color: var(--success);
  border-color: var(--success);
  color: #ffffff;
}

/* --- Footer Credits Section --- */
.app-footer {
  background-color: var(--bg-navbar);
  border-top: 1px solid var(--border-color);
  padding: 48px 0;
  margin-top: 80px;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-logo i {
  font-size: 22px;
  color: var(--accent-primary);
}

.footer-logo span {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.footer-brand-area p {
  font-size: 13px;
  color: var(--text-muted);
  max-width: 520px;
}

.footer-credit-area {
  display: flex;
  justify-content: flex-end;
}

.credit-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
  padding: 24px;
  max-width: 320px;
  box-shadow: var(--shadow-sm);
}

.credit-card span {
  font-size: 9.5px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.credit-card h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  color: var(--accent-primary);
  margin: 2px 0 6px 0;
}

.credit-card p {
  font-size: 11px;
  color: var(--text-muted);
}

/* --- Search View overlay layout --- */
.search-results-syllabus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.search-no-results {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-md);
}

.search-no-results i {
  font-size: 36px;
  color: var(--text-muted);
}

/* --- Responsive Adjustments --- */
@media (max-width: 1024px) {
  .navbar {
    padding: 0 20px;
  }
  
  .nav-menu {
    display: none; /* simple presentation */
  }
  
  .hero-container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  
  .hero-badge {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-stats-row {
    justify-content: center;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .hero-attribution {
    justify-content: center;
  }
  
  .pillars-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .module-syllabus-block {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  
  .module-info-pane {
    position: static;
  }
  
  .resources-grid-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .resources-info-column {
    position: static;
    text-align: center;
  }
  
  .resources-info-column .section-title-wrap.align-left {
    text-align: center;
  }
  
  .resources-graphic-wrapper {
    max-width: 440px;
    margin: 0 auto;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }
  
  .footer-brand-area p {
    margin: 0 auto;
  }
  
  .footer-credit-area {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 36px;
  }
  
  .roadmap-connectors {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }
  
  .roadmap-node.branch {
    width: 100%;
    max-width: 240px;
  }
  
  .resource-horizontal-card {
    grid-template-columns: 48px 1fr;
    gap: 16px;
  }
  
  .res-card-action-bar {
    grid-column: span 2;
    align-items: stretch;
    flex-direction: row;
    justify-content: space-between;
    border-top: 1px solid var(--border-light);
    padding-top: 14px;
  }
  
  .lesson-modal {
    width: 95%;
    max-height: 90vh;
  }
  
  .modal-header {
    padding: 16px 20px;
  }
  
  .modal-body {
    padding: 20px;
  }
  
  .modal-footer {
    padding: 16px 20px;
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }
  
  .modal-footer-nav {
    justify-content: space-between;
  }
  
  .modal-footer-nav button {
    flex-grow: 1;
    justify-content: center;
  }
  
  .modal-complete-btn {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-stats-row {
    flex-direction: column;
    gap: 16px;
  }
}

/* --- PDF Visualizer Modal Styles --- */
.pdf-modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-color: rgba(0,0,0,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 20000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.pdf-modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.pdf-modal {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -45%) scale(0.95);
  width: 90%;
  max-width: 1000px;
  height: 85vh;
  background-color: var(--bg-navbar);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  z-index: 20001;
  display: flex;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-normal);
}

.pdf-modal.active {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
  pointer-events: auto;
}

.pdf-modal-header {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: rgba(255, 255, 255, 0.02);
}

.pdf-modal-tag {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  color: var(--accent-primary);
  letter-spacing: 1px;
}

.pdf-modal-title {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 800;
  margin-top: 2px;
  color: var(--text-primary);
}

.pdf-modal-header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.pdf-modal-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--border-radius-sm);
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 700;
  transition: var(--transition-fast);
  text-decoration: none;
}

.pdf-modal-download-btn:hover {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
}

.pdf-modal-close-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  transition: var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pdf-modal-close-btn:hover {
  color: var(--text-primary);
}

.pdf-modal-body {
  flex-grow: 1;
  background-color: #1a1a1a;
  overflow: hidden;
  border-bottom-left-radius: var(--border-radius-lg);
  border-bottom-right-radius: var(--border-radius-lg);
}

#pdf-viewer-frame {
  width: 100%;
  height: 100%;
  border: none;
  background-color: #1a1a1a;
}

.res-view-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--border-radius-sm);
  background-color: var(--accent-primary);
  border: none;
  color: #ffffff;
  font-family: inherit;
  font-size: 12px;
  font-weight: 700;
  transition: var(--transition-fast);
  cursor: pointer;
}

.res-view-btn:hover {
  background-color: var(--accent-secondary);
  box-shadow: 0 4px 10px rgba(139, 92, 246, 0.25);
}

@media (max-width: 768px) {
  .pdf-modal {
    width: 95%;
    height: 90vh;
  }
}