/*=========
CSS Custom Properties (Variables)
==========*/
:root {
  /* Color Palette - Bold, Intellectual, Strong Military Theme */
  --color-primary: #0f172a; /* Deep navy blue - primary background */
  --color-secondary: #1e293b; /* Darker navy - secondary background */
  --color-tertiary: #334155; /* Medium slate - borders and accents */
  --color-accent: #ca8a04; /* Rich gold - primary accent */
  --color-accent-hover: #eab308; /* Brighter gold on hover */
  --color-accent-light: #fbbf24; /* Light gold for highlights */
  --color-text: #f8fafc; /* Soft white - primary text */
  --color-text-secondary: #cbd5e1; /* Light gray - secondary text */
  --color-text-muted: #94a3b8; /* Muted gray - tertiary text */
  --color-link: #1e3a8a; /* Professional blue */
  --color-link-alternate: #60a5fa; /* Professional bright blue */
  --color-link-hover: #2563eb; /* Darker blue on hover */
  --color-link-hover-alternate: #93c5fd; /* Alternate hover blue state */
  --color-success: #059669; /* Deep green - success states */
  --color-error: #dc2626; /* Deep red - error states */
  --color-warning: #d97706; /* Orange - warnings */
  --color-border: #475569; /* Slate gray - borders */
  --color-quiz-text: #f1f5f9; /* Very soft white for quiz text */
  --color-quiz-accent: #eab308; /* Gold for quiz elements */
  --color-quiz-bg: #1e293b; /* Dark navy for quiz background */
  --color-card-bg: #1e293b; /* Navy for card backgrounds */
  --color-overlay: rgba(15, 23, 42, 0.9); /* Navy overlay */
  
  /* Typography */
  --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --font-heading: 'Staatliches', 'Segoe UI', sans-serif;
  --font-size-base: 16px;
  --font-size-small: 0.875rem;
  --font-size-large: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Border Radius */
  --border-radius-sm: 0.5rem;
  --border-radius-md: 0.75rem;
  --border-radius-lg: 1rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.8s ease;
  
  /* Shadows */
  --shadow-sm: 0 4px 8px rgba(0, 0, 0, 0.5);
  --shadow-md: 0 8px 16px rgba(250, 204, 21, 0.6);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
  
  /* Responsive Breakpoints */
  --breakpoint-xs: 480px;
  --breakpoint-sm: 576px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 992px;
  --breakpoint-xl: 1200px;
  --breakpoint-xxl: 1400px;
}

/*=========
Global Styles
==========*/
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
  -webkit-text-size-adjust: 100%;
  -ms-text-size-adjust: 100%;
}

body {
  background-color: var(--color-primary);
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--color-text);
  margin: 0;
  padding: 0;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Hide content by default until authentication is checked */
body:not(.authenticated) main,
body:not(.authenticated) header,
body:not(.authenticated) footer {
  display: none;
  visibility: hidden;
}

/*=======
Font Styles
========*/
h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--spacing-sm) 0;
  line-height: 1.2;
}

h1, h2, .quiz-question, .quiz-btn {
  font-family: var(--font-heading);
}

p {
  margin: 0 0 var(--spacing-sm) 0;
}

/*========================
Responsive Font Scaling with clamp() Styles
=========================*/
.hero-content h2 {
  font-size: clamp(1.75rem, 2.5vw, 2.5rem);
}

.hero-content p {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
}

.quiz-options li {
  font-size: clamp(0.875rem, 1.2vw, 1.125rem);
}

.quiz-btn {
  font-size: clamp(0.875rem, 1.2vw, 1.125rem);
}

.content-section h3 {
  font-size: clamp(1.125rem, 1.5vw, 1.25rem);
}

.video-section h4 {
  font-size: clamp(0.875rem, 1.3vw, 1.125rem);
}

/*========================
Container Styles
=========================*/
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  width: 100%;
}

/*========================
Hamburger Styles
=========================*/
.hamburger {
  display: none;
  font-size: clamp(2rem, 4vw, 3rem);
  background: none;
  border: none;
  color: var(--color-accent);
  cursor: pointer;
  transition: color var(--transition-normal);
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-sm);
}

.hamburger:hover {
  color: var(--color-accent-hover);
  background-color: rgba(202, 138, 4, 0.1);
}

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

/*========================
Navbar & Logo Styles
=========================*/
.navbar {
  background-color: var(--color-secondary);
  padding: var(--spacing-sm) 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
  border-bottom: 2px solid var(--color-accent);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.logo {
  display: block;
  text-decoration: none;
}

.logo img {
  height: clamp(3rem, 8vw, 6rem);
  width: auto;
  transition: transform var(--transition-normal);
  max-width: 100%;
}

.logo:hover img {
  transform: scale(1.05);
}

/*========================
Navbar Links Styles
=========================*/
.nav-links {
  list-style: none;
  display: flex;
  gap: var(--spacing-md);
  margin: 0;
  padding: 0;
  align-items: center;
}

.nav-links li {
  margin: 0;
}

.nav-links li a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-normal);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-sm);
  display: block;
  white-space: nowrap;
}

.nav-links li a:hover,
.nav-links li a.active {
  color: var(--color-accent);
  text-decoration: underline;
  background-color: rgba(202, 138, 4, 0.1);
  transform: translateY(-1px);
}

.nav-links li a:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/*========================
Navbar Responsive Styles
=========================*/
@media (max-width: 768px) {
  .hamburger {
    display: block;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-secondary);
    flex-direction: column;
    width: 100%;
    padding: var(--spacing-sm);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    border-top: 1px solid var(--color-border);
  }

  .nav-links.show {
    display: flex;
  }

  .nav-links li {
    width: 100%;
    padding: var(--spacing-xs) 0;
    text-align: center;
  }

  .nav-links li a {
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
  }
}

@media (max-width: 480px) {
  .navbar .container {
    padding: 0 var(--spacing-xs);
  }
  
  .logo img {
    height: clamp(2.5rem, 6vw, 4rem);
  }
}

/*========================
Hero Styles
=========================*/
.hero {
  background: url('../images/american_flag.jpg') center/cover no-repeat;
  position: relative;
  text-align: center;
  padding: clamp(var(--spacing-xl), 8vw, calc(var(--spacing-xl) * 2)) var(--spacing-sm);
  min-height: clamp(60vh, 80vh, 90vh);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(15, 23, 42, 0.8) 0%,
    rgba(30, 41, 59, 0.7) 50%,
    rgba(202, 138, 4, 0.3) 100%
  );
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
  padding: 0 var(--spacing-sm);
}

.hero-logo {
  margin-bottom: var(--spacing-lg);
}

.hero-logo img {
  height: clamp(80px, 15vw, 120px);
  width: auto;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
  animation: logoFloat 3s ease-in-out infinite;
  max-width: 100%;
}

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

.hero-title {
  font-size: clamp(1.75rem, 4vw, 3.5rem);
  font-weight: bold;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
  line-height: 1.2;
  letter-spacing: 1px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.5rem);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
  font-weight: 300;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-top: var(--spacing-xl);
}

.badge {
  background: rgba(202, 138, 4, 0.9);
  color: var(--color-primary);
  padding: clamp(var(--spacing-xs), 2vw, var(--spacing-sm)) clamp(var(--spacing-sm), 3vw, var(--spacing-md));
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: 600;
  font-size: clamp(0.75rem, 1.5vw, 0.9rem);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
  transition: all var(--transition-normal);
  border: 2px solid rgba(202, 138, 4, 0.3);
  white-space: nowrap;
}

.badge:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
  background: rgba(202, 138, 4, 1);
}

.badge-icon {
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.badge-text {
  font-family: var(--font-heading);
}

/* Responsive hero adjustments */
@media (max-width: 768px) {
  .hero {
    padding: var(--spacing-xl) var(--spacing-sm);
    min-height: 70vh;
  }
  
  .hero-badges {
    gap: var(--spacing-sm);
    justify-content: center;
  }
  
  .badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .hero {
    min-height: 60vh;
    padding: var(--spacing-lg) var(--spacing-xs);
  }
  
  .hero-badges {
    gap: var(--spacing-xs);
  }
  
  .badge {
    padding: var(--spacing-xs);
    font-size: 0.7rem;
  }
  
  .hero-content {
    padding: 0 var(--spacing-xs);
  }
}

/*========================
Youtube Video Styles
=========================*/
.video-section {
  color: var(--color-accent);
  text-align: center;
  padding: clamp(var(--spacing-lg), 4vw, 2rem);
  margin: var(--spacing-lg) 0;
}

.video-container {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 ratio */
  height: 0;
  overflow: hidden;
  max-width: 100%;
  margin: 0 auto;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.video-section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.video-section h4 {
  font-size: clamp(0.875rem, 1.3vw, 1.125rem);
  margin-top: var(--spacing-sm);
  color: var(--color-error);
  font-weight: normal;
}

.video-section p {
  margin: var(--spacing-sm) 0;
}

.video-section p a {
  color: var(--color-link-alternate);
  text-decoration: underline;
  transition: color var(--transition-normal);
}

.video-section p a:hover {
  color: var(--color-link-hover-alternate);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: var(--border-radius-lg);
}

/*========================
Section Styles
=========================*/
.content-section {
  margin: var(--spacing-xl) 0;
  padding: 0 var(--spacing-sm);
}

.content-section h3 {
  font-size: clamp(1.125rem, 1.5vw, 1.25rem);
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.content-section p {
  margin-bottom: var(--spacing-md);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.content-section a {
  color: var(--color-link);
  text-decoration: underline;
  transition: color var(--transition-normal);
}

.content-section a:hover {
  color: var(--color-link-hover);
}





/*========================
NCO Creed Styles
=========================*/
.nco-creed-poster {
  max-width: 800px;
  margin: var(--spacing-xl) auto;
  padding: clamp(var(--spacing-md), 4vw, 2rem);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: var(--color-text);
  border-radius: var(--border-radius-lg);
  border: 2px solid var(--color-accent);
  box-shadow: 0 0 20px rgba(202, 138, 4, 0.3);
  font-family: 'Georgia', serif;
}

.poster-title {
  text-align: center;
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: var(--spacing-lg);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 1px;
  text-shadow: 0 0 10px rgba(202, 138, 4, 0.3);
}

.poster-content p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
  font-size: clamp(0.875rem, 1.2vw, 1.1rem);
}

/*========================
Board Prep Styles
=========================*/
.center-text {
  margin: var(--spacing-xl) 0;
  text-align: center;
  padding: 0 var(--spacing-sm);
}

.center-text h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.center-text p {
  font-size: clamp(0.875rem, 1.1vw, 1rem);
  margin-bottom: var(--spacing-md);
}

.center-text ul {
  list-style-type: none;
  padding: 0;
  margin: var(--spacing-md) 0;
  text-align: left;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.center-text ul li {
  margin: var(--spacing-sm) 0;
  padding: var(--spacing-xs) 0;
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

/* Board Prep Grid Layout */
.board-prep-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.prep-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

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

.prep-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.question-item {
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm);
  background: var(--color-secondary);
  border-radius: var(--border-radius-md);
  border-left: 4px solid var(--color-accent);
}

.question-item h4 {
  color: var(--color-accent-light);
  margin-bottom: var(--spacing-xs);
  font-size: clamp(1rem, 1.2vw, 1.125rem);
}

.question-item p {
  margin: 0;
  color: var(--color-text);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.tips-list {
  list-style: none;
  padding: 0;
}

.tips-list li {
  margin-bottom: var(--spacing-sm);
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.tips-list li:last-child {
  border-bottom: none;
}

.tips-list li strong {
  color: var(--color-accent);
}

/* Study Guide Grid */
.study-guide-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.guide-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.guide-card:hover {
  transform: translateY(-2px);
}

.guide-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.guide-content h4 {
  color: var(--color-accent-light);
  margin: var(--spacing-md) 0 var(--spacing-sm) 0;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
}

.guide-content ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.guide-content li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

/* NCOER Section */
.ncoer-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.ncoer-card,
.counseling-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.ncoer-card h3,
.counseling-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.ncoer-content h4,
.counseling-content h4 {
  color: var(--color-accent-light);
  margin: var(--spacing-md) 0 var(--spacing-sm) 0;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
}

.ncoer-content ul,
.counseling-content ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.ncoer-content li,
.counseling-content li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.counseling-content p {
  margin-bottom: var(--spacing-sm);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

/* Practice Section */
.practice-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.scenario-card,
.quiz-practice {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.scenario-card h3,
.quiz-practice h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.scenario-content h4 {
  color: var(--color-accent-light);
  margin: var(--spacing-md) 0 var(--spacing-sm) 0;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
}

.scenario-content p {
  margin-bottom: var(--spacing-sm);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.scenario-answer {
  background: var(--color-secondary);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  margin-top: var(--spacing-md);
  border-left: 4px solid var(--color-success);
}

.scenario-answer h5 {
  color: var(--color-success);
  margin-bottom: var(--spacing-sm);
  font-size: clamp(1rem, 1.2vw, 1.125rem);
}

.scenario-answer ol {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.scenario-answer li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.practice-questions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.practice-question {
  background: var(--color-secondary);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  border-left: 4px solid var(--color-accent);
}

.practice-question h4 {
  color: var(--color-accent-light);
  margin-bottom: var(--spacing-sm);
  font-size: clamp(1rem, 1.2vw, 1.125rem);
}

.practice-question p {
  margin: 0;
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.practice-question strong {
  color: var(--color-success);
}

/* Resources Grid */
.resources-grid {
  display: -webkit-box;
  display: -ms-flexbox;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.resource-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.resource-card:hover {
  transform: translateY(-2px);
}

.resource-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.resource-card ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.resource-card li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

/* Responsive adjustments for board prep */
@media (max-width: 768px) {
  .board-prep-grid,
  .study-guide-grid,
  .ncoer-section,
  .practice-section,
  .resources-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .prep-card,
  .guide-card,
  .ncoer-card,
  .counseling-card,
  .scenario-card,
  .quiz-practice,
  .resource-card {
    padding: var(--spacing-md);
  }
}

/*========================
Security+ Specific Styles
=========================*/
.cert-overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.overview-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.overview-card:hover {
  transform: translateY(-2px);
}

.overview-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.overview-card ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.overview-card li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.overview-card strong {
  color: var(--color-accent-light);
}

.download-section {
  margin-top: var(--spacing-md);
  text-align: center;
}

.download-btn {
  display: inline-block;
  background: var(--color-accent);
  color: var(--color-text);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--border-radius-md);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  margin: 5px;
}

.download-btn:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.concepts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.concept-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.concept-card:hover {
  transform: translateY(-2px);
}

.concept-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.concept-content h4 {
  color: var(--color-accent-light);
  margin: var(--spacing-md) 0 var(--spacing-sm) 0;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
}

.concept-content ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.concept-content li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.tip-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.tip-card:hover {
  transform: translateY(-2px);
}

.tip-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.tip-card ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.tip-card li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.career-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.career-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.career-card:hover {
  transform: translateY(-2px);
}

.career-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.career-card p {
  margin-bottom: var(--spacing-md);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
  color: var(--color-text-secondary);
}

.career-card ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.career-card li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
  color: var(--color-success);
}

/* Responsive adjustments for Security+ */
@media (max-width: 768px) {
  .cert-overview-grid,
  .concepts-grid,
  .tips-grid,
  .career-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .overview-card,
  .concept-card,
  .tip-card,
  .career-card {
    padding: var(--spacing-md);
  }
}

/*========================
Network+ Specific Styles
=========================*/
.security-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.security-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.security-card:hover {
  transform: translateY(-2px);
}

.security-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.security-card ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.security-card li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

/* Responsive adjustments for Network+ */
@media (max-width: 768px) {
  .security-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .security-card {
    padding: var(--spacing-md);
  }
}

/*========================
BLC Specific Styles
=========================*/
.blc-overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.leadership-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.leadership-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.leadership-card:hover {
  transform: translateY(-2px);
}

.leadership-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.leadership-content h4 {
  color: var(--color-accent-light);
  margin: var(--spacing-md) 0 var(--spacing-sm) 0;
  font-size: clamp(1rem, 1.2vw, 1.125rem);
}

.leadership-content ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.leadership-content li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

.requirements-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.requirement-card {
  background: var(--color-card-bg);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.requirement-card:hover {
  transform: translateY(-2px);
}

.requirement-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: clamp(1.25rem, 1.5vw, 1.5rem);
}

.requirement-card ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

.requirement-card li {
  margin-bottom: var(--spacing-xs);
  font-size: clamp(0.875rem, 1.1vw, 1rem);
}

/* Responsive adjustments for BLC */
@media (max-width: 768px) {
  .blc-overview-grid,
  .leadership-grid,
  .requirements-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .leadership-card,
  .requirement-card {
    padding: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .prep-card,
  .guide-card,
  .ncoer-card,
  .counseling-card,
  .scenario-card,
  .quiz-practice,
  .resource-card {
    padding: var(--spacing-sm);
  }
  
  .question-item,
  .scenario-answer,
  .practice-question {
    padding: var(--spacing-sm);
  }
}

/*========================
Flashcard Styles
=========================*/
.flashcard-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin: var(--spacing-lg) 0;
  padding: 0 var(--spacing-sm);
}

.flashcard-counter {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-sm);
  text-align: center;
}

.flashcard {
  background-color: var(--color-card-bg);
  color: var(--color-text);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 8px 16px rgba(202, 138, 4, 0.3);
  width: 100%;
  max-width: clamp(300px, 90vw, 400px);
  height: clamp(250px, 60vh, 300px);
  margin-bottom: var(--spacing-sm);
  perspective: 1000px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  cursor: pointer;
  word-wrap: break-word;
  overflow: hidden;
  position: relative;
  transition: all var(--transition-normal);
}

.flashcard:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(202, 138, 4, 0.5);
  border-color: var(--color-accent-light);
}

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

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  text-align: center;
  transition: transform var(--transition-slow), box-shadow var(--transition-normal);
  transform-style: preserve-3d;
}

.flashcard p {
  font-size: clamp(1rem, 2vw, 1.4rem);
  line-height: 1.5;
  padding: 0 var(--spacing-sm);
}

.flashcard.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  padding: clamp(var(--spacing-sm), 3vw, 1.5rem);
  font-size: clamp(0.875rem, 2vw, 1.4rem);
  color: var(--color-text);
  border-radius: var(--border-radius-lg);
  backface-visibility: hidden;
  box-sizing: border-box;
  overflow-x: hidden;
  overflow-y: auto;
  word-wrap: break-word;
  white-space: normal;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  line-height: 1.4;
}

.flashcard-front {
  background-color: var(--color-card-bg);
}

.flashcard-back {
  background-color: var(--color-secondary);
  transform: rotateY(180deg);
}

.nav-btns {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  justify-content: center;
}

.nav-btns button {
  background-color: var(--color-link);
  color: var(--color-text);
  border: none;
  padding: clamp(0.5rem, 2vw, 0.75rem) clamp(1rem, 3vw, 1.25rem);
  border-radius: var(--border-radius-sm);
  font-weight: bold;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: clamp(0.875rem, 1.2vw, 1rem);
  white-space: nowrap;
}

.nav-btns button:hover {
  background-color: var(--color-link-hover);
  transform: scale(1.05);
}

.nav-btns button:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.flashcard-front::-webkit-scrollbar,
.flashcard-back::-webkit-scrollbar {
  width: 6px;
}

.flashcard-front::-webkit-scrollbar-thumb,
.flashcard-back::-webkit-scrollbar-thumb {
  background-color: var(--color-accent);
  border-radius: 3px;
}

/*========================
Practice Test Styles
=========================*/
.quiz-container {
  max-width: clamp(500px, 90vw, 600px);
  background-color: var(--color-quiz-bg);
  border: 2px solid var(--color-accent);
  margin: var(--spacing-lg) auto;
  padding: clamp(var(--spacing-md), 4vw, 2rem);
  border-radius: var(--border-radius-lg);
  box-shadow: 0 10px 25px rgba(202, 138, 4, 0.2);
}

.quiz-question {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
  color: var(--color-quiz-text);
  line-height: 1.4;
}

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

.quiz-options li {
  background-color: var(--color-tertiary);
  padding: clamp(0.75rem, 2vw, 0.9rem) clamp(0.75rem, 2vw, 1rem);
  margin-bottom: clamp(0.5rem, 1.5vw, 0.8rem);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-weight: 500;
  text-align: center;
  user-select: none;
  border: 1px solid var(--color-border);
  font-size: clamp(0.875rem, 1.2vw, 1.125rem);
}

.quiz-options li:hover {
  background-color: var(--color-secondary);
  transform: scale(1.02);
  border-color: var(--color-accent-light);
}

.quiz-options li.correct {
  background-color: var(--color-success);
  color: var(--color-text);
  border-color: var(--color-success);
  box-shadow: 0 0 10px rgba(5, 150, 105, 0.3);
}

.quiz-options li.incorrect {
  background-color: var(--color-error);
  border-color: var(--color-error);
  box-shadow: 0 0 10px rgba(220, 38, 38, 0.3);
}

.quiz-option.selected {
  background-color: #60a5fa;
  border: 2px solid #1f2937;
}

.quiz-options li.disabled {
  cursor: default;
  pointer-events: none;
}

.quiz-nav {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-lg);
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.quiz-btn {
  background-color: var(--color-accent);
  color: var(--color-text);
  border: none;
  border-radius: var(--border-radius-md);
  padding: clamp(0.5rem, 2vw, 0.7rem) clamp(1.25rem, 3vw, 1.8rem);
  font-size: clamp(0.875rem, 1.2vw, 1.125rem);
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(202, 138, 4, 0.4);
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.quiz-btn:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 12px rgba(202, 138, 4, 0.5);
}

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

.quiz-progress {
  background-color: var(--color-tertiary);
  border-radius: 6px;
  height: 10px;
  margin-top: var(--spacing-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.quiz-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
  width: 0%;
  transition: width var(--transition-normal);
  box-shadow: 0 0 5px rgba(202, 138, 4, 0.3);
}

#retake-btn {
  margin-top: var(--spacing-sm);
  padding: clamp(0.5rem, 2vw, 0.75rem) clamp(1rem, 3vw, 1.25rem);
  font-size: clamp(0.875rem, 1.2vw, 1rem);
  background-color: var(--color-link);
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  color: var(--color-text);
  transition: all var(--transition-normal);
  white-space: nowrap;
}

#retake-btn:hover {
  background-color: var(--color-link-hover);
  transform: scale(1.05);
}

#retake-btn:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/*========================
Footer Styles
=========================*/
.footer {
  text-align: center;
  background-color: var(--color-secondary);
  padding: var(--spacing-md);
  font-size: clamp(0.75rem, 1vw, 0.875rem);
  color: var(--color-text-secondary);
  margin-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

/*========================
Comprehensive Responsive Design
=========================*/

/* Extra Small Devices (phones, 480px and down) */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-xs);
  }
  
  .hero {
    min-height: 60vh;
  }
  
  .hero-badges {
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
  }
  
  .badge {
    width: 100%;
    max-width: 200px;
    justify-content: center;
  }
  
  .nav-btns {
    flex-direction: column;
    width: 100%;
  }
  
  .nav-btns button {
    width: 100%;
  }
  
  .quiz-nav {
    flex-direction: column;
  }
  
  .quiz-nav .quiz-btn {
    width: 100%;
  }
  
  .flashcard {
    height: 200px;
  }
  
  .video-section {
    padding: var(--spacing-sm);
  }
  
  .content-section {
    padding: 0 var(--spacing-xs);
  }
}

/* Small Devices (landscape phones, 576px and up) */
@media (min-width: 481px) and (max-width: 576px) {
  .hero-badges {
    gap: var(--spacing-sm);
  }
  
  .badge {
    font-size: 0.8rem;
  }
}

/* Medium Devices (tablets, 768px and up) */
@media (min-width: 577px) and (max-width: 768px) {
  .hero-badges {
    gap: var(--spacing-md);
  }
  
  .flashcard {
    max-width: 350px;
  }
}

/* Large Devices (desktops, 992px and up) */
@media (min-width: 769px) and (max-width: 992px) {
  .container {
    max-width: 960px;
  }
  
  .hero-content {
    max-width: 800px;
  }
}

/* Extra Large Devices (large desktops, 1200px and up) */
@media (min-width: 993px) and (max-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

/* Extra Extra Large Devices (1400px and up) */
@media (min-width: 1201px) {
  .container {
    max-width: 1320px;
  }
  
  .hero-content {
    max-width: 1000px;
  }
}

/* Landscape Orientation Adjustments */
@media (orientation: landscape) and (max-height: 600px) {
  .hero {
    min-height: 100vh;
    padding: var(--spacing-md) var(--spacing-sm);
  }
  
  .hero-logo {
    margin-bottom: var(--spacing-sm);
  }
  
  .hero-badges {
    margin-top: var(--spacing-md);
  }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .hero {
    background-image: url('../images/american_flag.jpg');
    background-size: cover;
  }
}

/* Print Styles */
@media print {
  .navbar,
  .hamburger,
  .nav-btns,
  .quiz-nav,
  .footer {
    display: none !important;
  }
  
  .hero {
    background: none !important;
    color: black !important;
    min-height: auto !important;
  }
  
  .hero-overlay {
    display: none !important;
  }
  
  .hero-content {
    color: black !important;
  }
  
  .hero-title,
  .hero-subtitle {
    color: black !important;
    text-shadow: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .flashcard,
  .quiz-container {
    border: 1px solid black !important;
    box-shadow: none !important;
  }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .hero-logo img {
    animation: none;
  }
}

/* Dark Mode Support (if user prefers) */
@media (prefers-color-scheme: dark) {
  /* Colors already optimized for dark theme - no changes needed */
}

/* Focus Visible for Better Accessibility */
*:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Ensure touch targets are large enough */
@media (hover: none) and (pointer: coarse) {
  .nav-links li a,
  .badge,
  .quiz-options li,
  .quiz-btn,
  .nav-btns button {
    min-height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
}

/* =====================
   DROPDOWN MENU STYLES
   ===================== */

/* Dropdown Container */
.dropdown {
  position: relative;
}

.dropdown-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
}

.dropdown-arrow {
  font-size: 0.75rem;
  transition: transform var(--transition-normal);
}

.dropdown.active .dropdown-arrow {
  transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  margin-top: 2px;
}

.dropdown.active .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}



.dropdown-menu li {
  margin: 0;
  padding: 0;
  list-style: none;
}

.dropdown-menu a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text);
  text-decoration: none;
  transition: var(--transition-fast);
  border: none;
  background: transparent;
  position: relative;
}

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

.dropdown-menu a.active {
  background: var(--color-accent);
  color: var(--color-primary);
}

/* Ensure no list styling in dropdown */
.dropdown-menu,
.dropdown-menu ul,
.dropdown-menu li {
  list-style: none;
  list-style-type: none;
}

/* Mobile Dropdown Styles */
@media (max-width: 768px) {
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: transparent;
    padding: 0;
    margin-left: var(--spacing-md);
    display: none;
    list-style: none;
  }
  
  .dropdown.active .dropdown-menu {
    display: block;
  }
  
  .dropdown-menu a {
    padding: var(--spacing-xs) var(--spacing-md);
    margin-left: var(--spacing-sm);
  }
  
  .dropdown-arrow {
    margin-left: auto;
  }
}

/* =====================
   HOMEPAGE GRID LAYOUTS
   ===================== */

/* Certification Grid */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.cert-item {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.cert-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.cert-item h4 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xl);
}

.cert-item p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.cert-item a {
  display: inline-block;
  background: transparent;
  color: var(--color-accent);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-md);
  font-weight: bold;
  transition: var(--transition-fast);
}

.cert-item a:hover {
  background: var(--color-accent);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* Training Grid */
.training-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.training-item {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.training-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.training-item h4 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xl);
}

.training-item p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.training-item a {
  display: inline-block;
  background: transparent;
  color: var(--color-accent);
  padding: var(--spacing-sm) var(--spacing-md);
  text-decoration: none;
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-md);
  font-weight: bold;
  transition: var(--transition-fast);
}

.training-item a:hover {
  background: var(--color-accent);
  color: var(--color-primary);
  transform: translateY(-1px);
}

/* Responsive Design for Homepage Grids */
@media (max-width: 768px) {
  .cert-grid,
  .training-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .cert-item,
  .training-item {
    padding: var(--spacing-md);
  }
}

/* =====================
   ABOUT US PAGE STYLES
   ===================== */

/* About Grid Layout */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.about-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

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

.about-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xl);
}

.about-card p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.about-card ul {
  list-style: none;
  padding: 0;
}

.about-card li {
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);
  position: relative;
}

.about-card li::before {
  content: "•";
  color: var(--color-accent);
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* Mission Grid Layout */
.mission-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.mission-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

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

.mission-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xl);
}

.mission-card p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.mission-card ul {
  list-style: none;
  padding: 0;
}

.mission-card li {
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);
  position: relative;
}

.mission-card li::before {
  content: "→";
  color: var(--color-accent);
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* Vision Card */
.vision-card {
  background: linear-gradient(135deg, var(--color-card-bg) 0%, var(--color-secondary) 100%);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.vision-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-2xl);
}

.vision-card p {
  font-size: var(--font-size-large);
  line-height: 1.8;
  max-width: 800px;
  margin: 0 auto;
}

/* Contributors Grid */
.contributors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.contributor-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

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

.contributor-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xl);
}

.contributor-card p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.contributor-card ul {
  list-style: none;
  padding: 0;
}

.contributor-card li {
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);
  position: relative;
}

.contributor-card li::before {
  content: "✓";
  color: var(--color-success);
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* Acknowledgment Card */
.acknowledgment-card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  box-shadow: var(--shadow-sm);
}

.acknowledgment-card h3 {
  color: var(--color-accent);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xl);
}

.acknowledgment-card p {
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.acknowledgment-card ul {
  list-style: none;
  padding: 0;
}

.acknowledgment-card li {
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);
  position: relative;
}

.acknowledgment-card li::before {
  content: "🎖️";
  position: absolute;
  left: 0;
}

/* Contribute Card */
.contribute-card {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.contribute-card h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-2xl);
}

.contribute-card p {
  color: var(--color-primary);
  font-size: var(--font-size-large);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.contribute-card strong {
  color: var(--color-primary);
  font-weight: bold;
}

/* Responsive Design for About Page */
@media (max-width: 768px) {
  .about-grid,
  .mission-grid,
  .contributors-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  
  .about-card,
  .mission-card,
  .contributor-card {
    padding: var(--spacing-md);
  }
  
  .vision-card,
  .contribute-card {
    padding: var(--spacing-lg);
  }
  
  .vision-card h3,
  .contribute-card h3 {
    font-size: var(--font-size-xl);
  }
  
  .vision-card p,
  .contribute-card p {
    font-size: var(--font-size-base);
  }
}

@media (max-width: 480px) {
  .about-card,
  .mission-card,
  .contributor-card,
  .acknowledgment-card {
    padding: var(--spacing-sm);
  }
  
  .vision-card,
  .contribute-card {
    padding: var(--spacing-md);
  }
}

/* =====================
   AUTHENTICATION STYLES
   ===================== */

#auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.auth-container {
    width: 100%;
    max-width: 500px;
    padding: 2rem;
}

.auth-box {
    background: rgba(28, 40, 65, 0.95);
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 2px solid var(--color-accent);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-logo {
    width: 120px;
    height: auto;
    margin-bottom: 1rem;
}

.auth-header h1 {
    color: var(--color-accent);
    font-size: 2rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.auth-header p {
    color: #ffffff;
    font-size: 1.1rem;
    margin: 0;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    color: var(--color-accent);
    font-weight: 600;
    font-size: 1rem;
}

.input-group input {
    padding: 1rem;
    border: 2px solid var(--color-accent);
    border-radius: 10px;
    font-size: 1.1rem;
    background: white;
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.2);
}

.auth-btn {
    background: linear-gradient(135deg, var(--color-accent) 0%, #d4af37 100%);
    color: var(--color-primary);
    border: none;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.auth-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(212, 175, 55, 0.3);
}

.auth-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.error-message {
    background: #ff6b6b;
    color: white;
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
    font-weight: 600;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.auth-info {
    background: rgba(255, 255, 255, 0.1);
    border: 3px solid var(--color-accent);
    border-radius: 10px;
    padding: 1.5rem;
    margin-top: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.auth-info p {
    margin: 0.5rem 0;
    color: #ffffff;
    font-size: 1rem;
    line-height: 1.6;
    font-weight: 600;
}

.auth-info p:first-child {
    margin-top: 0;
    color: #d4af37;
    font-size: 1.1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.auth-info p:last-child {
    margin-bottom: 0;
}

.lockout-message {
    text-align: center;
    margin-bottom: 1.5rem;
}

.lockout-message p {
    color: var(--color-text);
    margin: 0.5rem 0;
    font-size: 1rem;
}

.countdown {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin: 1rem 0;
    padding: 1rem;
    background: rgba(212, 175, 55, 0.1);
    border-radius: 10px;
    border: 2px solid var(--color-accent);
}

/* Responsive Design for Authentication */
@media (max-width: 768px) {
    .auth-container {
        padding: 1rem;
    }
    
    .auth-box {
        padding: 2rem;
    }
    
    .auth-header h1 {
        font-size: 1.5rem;
    }
    
    .auth-header p {
        font-size: 1rem;
    }
    
    .input-group input {
        font-size: 1rem;
        padding: 0.8rem;
    }
    
    .auth-btn {
        font-size: 1rem;
        padding: 0.8rem 1.5rem;
    }
    
    .countdown {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .auth-box {
        padding: 1.5rem;
    }
    
    .auth-header h1 {
        font-size: 1.3rem;
    }
    
    .auth-logo {
        width: 100px;
    }
}

/* =====================
   BROWSER COMPATIBILITY FALLBACKS
   ===================== */

/* IE11 and older browser support */
@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
    .resources-grid,
    .concepts-grid,
    .cert-grid,
    .training-grid,
    .about-grid,
    .mission-grid,
    .contributors-grid {
        display: -ms-flexbox;
        flex-wrap: wrap;
        -ms-flex-wrap: wrap;
    }
    
    .resources-grid > *,
    .concepts-grid > *,
    .cert-grid > *,
    .training-grid > *,
    .about-grid > *,
    .mission-grid > *,
    .contributors-grid > * {
        flex: 1 1 350px;
        -ms-flex: 1 1 350px;
        margin: var(--spacing-md);
    }
    
    /* Disable backdrop-filter for IE */
    #auth-overlay,
    .auth-box {
        -webkit-backdrop-filter: none;
        backdrop-filter: none;
        background: rgba(28, 40, 65, 0.98);
    }
}

/* Safari specific fixes */
@media screen and (-webkit-min-device-pixel-ratio: 0) {
    .flashcard {
        -webkit-transform-style: preserve-3d;
        transform-style: preserve-3d;
    }
    
    .flashcard-inner {
        -webkit-transform-style: preserve-3d;
        transform-style: preserve-3d;
    }
}

/* Firefox specific fixes */
@-moz-document url-prefix() {
    .flashcard {
        transform-style: preserve-3d;
    }
    
    .flashcard-inner {
        transform-style: preserve-3d;
    }
}

/* Mobile browser optimizations */
@media (max-width: 768px) {
    /* Improve touch targets */
    .nav-links li a,
    .auth-btn,
    .quiz-btn,
    .nav-btns button {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Optimize for mobile scrolling */
    .flashcard-front,
    .flashcard-back {
        -webkit-overflow-scrolling: touch;
        -webkit-overflow-scrolling: touch;
    }
}

/* =====================
   PRT CONTENT STYLES
   ===================== */
.prt-content {
    background: var(--color-card-bg);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.prt-content h5 {
    color: var(--color-accent);
    margin: 1.5rem 0 0.75rem 0;
    font-size: 1.1rem;
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 0.5rem;
}

.prt-content h6 {
    color: var(--color-accent);
    margin: 1rem 0 0.5rem 0;
    font-size: 1rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.prt-content h5:first-child {
    margin-top: 0;
}

.prt-content ul {
    margin: 0.5rem 0 1rem 0;
    padding-left: 1.5rem;
}

.prt-content li {
    margin-bottom: 0.25rem;
    color: var(--color-text);
    font-weight: 500;
}

.mnemonics {
    background: var(--color-tertiary);
    border: 1px solid var(--color-accent);
    border-radius: 6px;
    padding: 1rem;
    margin-top: 1rem;
}

.mnemonics h5 {
    color: var(--color-accent);
    margin: 0 0 0.75rem 0;
    font-size: 1rem;
    border-bottom: none;
    padding-bottom: 0;
}

.mnemonics p {
    margin: 0.5rem 0;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--color-text);
}

.mnemonics strong {
    color: var(--color-accent);
    font-weight: 600;
}

/* =====================
   VIDEO CREDIT STYLES
   ===================== */
.video-credit {
    background: rgba(28, 40, 65, 0.05);
    border-left: 4px solid var(--color-accent);
    padding: 1.5rem;
    margin-top: 1.5rem;
    border-radius: 0 8px 8px 0;
    font-size: 0.95rem;
    line-height: 1.6;
}

.video-credit p {
    margin: 0 0 1rem 0;
    color: var(--color-text);
}

.video-credit p:last-child {
    margin-bottom: 0;
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.video-credit strong {
    color: var(--color-accent);
    font-weight: 600;
}

.video-credit em {
    font-style: italic;
    color: var(--color-text-muted);
}

@media (max-width: 768px) {
    .video-credit {
        padding: 1rem;
        margin-top: 1rem;
        font-size: 0.9rem;
    }
    
    .video-credit p:last-child {
        font-size: 0.85rem;
    }
}

/* =====================
   NETWORKING CONTENT STYLES
   ===================== */

/* Formula Grid */
.formula-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 1rem 0;
}

.formula-item {
    background: var(--color-tertiary);
    border: 1px solid var(--color-accent);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.formula-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.formula-item h4 {
    color: var(--color-accent);
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.formula-item p {
    margin: 0.5rem 0;
    line-height: 1.6;
}

.formula-item strong {
    color: var(--color-accent);
    font-weight: 600;
    font-size: 1.1rem;
}

.formula-item em {
    color: var(--color-text-muted);
    font-style: italic;
}

/* Network Info Grid */
.network-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 1rem 0;
}

.info-item {
    background: var(--color-tertiary);
    border: 1px solid var(--color-accent);
    border-radius: 8px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.info-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.info-item h4 {
    color: var(--color-accent);
    margin: 0 0 1rem 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.info-item ul {
    margin: 0;
    padding-left: 1.5rem;
}

.info-item li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.info-item strong {
    color: var(--color-accent);
    font-weight: 600;
}

/* CIDR Table */
.table-container {
    overflow-x: auto;
    margin: 1rem 0;
    border-radius: 8px;
    border: 1px solid var(--color-accent);
}

.cidr-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-card-bg);
}

.cidr-table th {
    background: var(--color-accent);
    color: var(--color-primary);
    padding: 0.75rem;
    text-align: center;
    font-weight: 600;
    border-bottom: 2px solid var(--color-accent);
}

.cidr-table td {
    padding: 0.5rem;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

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

.cidr-table tr:last-child td {
    border-bottom: none;
}

/* Topology Grid */
.topology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 1rem 0;
}

.topology-card {
    background: var(--color-tertiary);
    border: 1px solid var(--color-accent);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.topology-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
}

.topology-card h3 {
    color: var(--color-accent);
    margin: 0 0 1.5rem 0;
    font-size: 1.3rem;
    font-weight: 600;
    text-align: center;
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 0.75rem;
}

.topology-content h4 {
    color: var(--color-accent);
    margin: 1.5rem 0 0.75rem 0;
    font-size: 1rem;
    font-weight: 600;
}

.topology-content h4:first-child {
    margin-top: 0;
}

.topology-content p {
    margin: 0.5rem 0 1rem 0;
    line-height: 1.6;
    color: var(--color-text);
}

.topology-content ul {
    margin: 0.5rem 0 1rem 0;
    padding-left: 1.5rem;
}

.topology-content li {
    margin-bottom: 0.5rem;
    line-height: 1.6;
    color: var(--color-text);
}

/* Responsive Design for Networking Content */
@media (max-width: 768px) {
    .formula-grid,
    .network-info-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .formula-item,
    .info-item {
        padding: 1rem;
    }
    
    .topology-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .topology-card {
        padding: 1.5rem;
    }
    
    .topology-card h3 {
        font-size: 1.2rem;
    }
    
    .cidr-table {
        font-size: 0.8rem;
    }
    
    .cidr-table th,
    .cidr-table td {
        padding: 0.5rem 0.25rem;
    }
}

@media (max-width: 480px) {
    .formula-item,
    .info-item {
        padding: 0.75rem;
    }
    
    .topology-card {
        padding: 1rem;
    }
    
    .topology-card h3 {
        font-size: 1.1rem;
    }
    
    .cidr-table {
        font-size: 0.75rem;
    }
    
    .cidr-table th,
    .cidr-table td {
        padding: 0.25rem 0.125rem;
    }
}