/* ==========================================================================
   CRACKING CLIENT-SIDE - BSides San Diego Workshop
   Cyberpunk/Hacker Theme Stylesheet
   ========================================================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;700&family=Orbitron:wght@400;500;600;700;800;900&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #141419;
  --bg-code: #0d1117;
  --bg-sidebar: #0d0d12;

  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent-green: #2e91f7;
  --accent-purple: #fc00e3;
  --accent-teal: #2e91f7;
  --accent-blue: #2e91f7;
  --accent-lime: #9eff1f;
  --accent-orange: #f9e830;
  --accent-red: #de0f3f;
  --accent-yellow: #f9e830;

  --glow-green: 0 0 20px rgba(46, 145, 247, 0.3), 0 0 40px rgba(46, 145, 247, 0.1);
  --glow-purple: 0 0 20px rgba(252, 0, 227, 0.3), 0 0 40px rgba(252, 0, 227, 0.1);
  --glow-teal: 0 0 20px rgba(46, 145, 247, 0.3), 0 0 40px rgba(46, 145, 247, 0.1);

  --font-display: 'Orbitron', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-body: 'Inter', sans-serif;

  --sidebar-width: 280px;
  --header-height: 0px;
  --border-color: #1e293b;
  --border-glow: rgba(46, 145, 247, 0.15);

  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* --- Noise/Grain Texture Overlay --- */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9998;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* --- Scanline Overlay --- */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9997;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
}

/* --- Animated Grid Background --- */
.grid-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image:
    linear-gradient(rgba(46, 145, 247, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 145, 247, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(60px, 60px); }
}

/* --- XSS Watermark --- */
.xss-watermark {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
  opacity: 0.02;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-green);
  line-height: 2.5;
  word-wrap: break-word;
}

/* --- Layout: Sidebar + Main --- */
.layout {
  display: flex;
  min-height: 100vh;
}

/* --- Sidebar Navigation --- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  transition: transform var(--transition-normal);
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-green);
  text-decoration: none;
  letter-spacing: 2px;
  text-transform: uppercase;
  display: block;
  text-shadow: var(--glow-green);
}

.sidebar-logo span {
  color: var(--text-secondary);
  font-weight: 400;
  font-size: 0.7rem;
  display: block;
  margin-top: 4px;
  letter-spacing: 1px;
  font-family: var(--font-mono);
  text-shadow: none;
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0;
}

.sidebar-nav ul {
  list-style: none;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 1.5rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 400;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
  position: relative;
}

.sidebar-nav a:hover {
  color: var(--text-primary);
  background: rgba(46, 145, 247, 0.03);
  border-left-color: rgba(46, 145, 247, 0.3);
}

.sidebar-nav a.active {
  color: var(--accent-green);
  background: rgba(46, 145, 247, 0.05);
  border-left-color: var(--accent-green);
  font-weight: 500;
}

.sidebar-nav .nav-icon {
  width: 18px;
  text-align: center;
  font-size: 0.8rem;
  opacity: 0.7;
  font-family: var(--font-mono);
}

.sidebar-nav .nav-section-label {
  padding: 1.25rem 1.5rem 0.4rem;
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-family: var(--font-display);
}

/* --- Progress Bar --- */
.progress-bar {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-color);
}

.progress-bar-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.progress-bar-track {
  height: 4px;
  background: var(--bg-primary);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-teal));
  border-radius: 2px;
  transition: width var(--transition-slow);
  width: 0%;
}

/* --- Mobile Hamburger --- */
.hamburger {
  display: none;
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 1100;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--accent-green);
  width: 44px;
  height: 44px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.25rem;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
}

.hamburger:hover {
  border-color: var(--accent-green);
  box-shadow: var(--glow-green);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 999;
}

/* --- Main Content --- */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  padding: 3rem 4rem;
  max-width: 1100px;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.3;
}

h1 {
  font-size: 2.5rem;
  color: var(--accent-green);
  text-shadow: var(--glow-green);
  margin-bottom: 1rem;
}

h2 {
  font-size: 1.75rem;
  color: var(--accent-teal);
  text-shadow: var(--glow-teal);
  margin-top: 3.5rem;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

h3 {
  font-size: 1.25rem;
  color: var(--accent-purple);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 1.05rem;
  color: var(--accent-blue);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-weight: 500;
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

a {
  color: var(--accent-teal);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-green);
}

strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* --- Section Dividers --- */
.section-divider {
  height: 2px;
  margin: 3rem 0;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-teal), transparent);
  border: none;
  border-radius: 1px;
}

/* --- Bullet Lists --- */
.content-list {
  list-style: none;
  padding: 0;
  margin-bottom: 1.5rem;
}

.content-list li {
  padding: 0.4rem 0 0.4rem 1.5rem;
  position: relative;
  color: var(--text-secondary);
  line-height: 1.6;
}

.content-list li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--accent-green);
  font-family: var(--font-mono);
  font-weight: 700;
}

.content-list li .sub-list {
  margin-top: 0.25rem;
}

.content-list li .sub-list li::before {
  content: '-';
  color: var(--accent-purple);
}

/* --- Code Blocks --- */
.code-block {
  position: relative;
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin: 1.5rem 0;
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-color);
}

.code-block-lang {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.code-block-dots {
  display: flex;
  gap: 6px;
}

.code-block-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.code-block-dots span:nth-child(1) { background: #ef4444; }
.code-block-dots span:nth-child(2) { background: #facc15; }
.code-block-dots span:nth-child(3) { background: #22c55e; }

.code-copy-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  transition: all var(--transition-fast);
}

.code-copy-btn:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.code-copy-btn.copied {
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.code-block pre {
  padding: 1rem 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-primary);
  counter-reset: line;
}

.code-block pre code {
  font-family: inherit;
}

.code-block .line-numbers {
  display: inline-block;
  min-width: 2.5rem;
  text-align: right;
  padding-right: 1rem;
  color: var(--text-muted);
  user-select: none;
  opacity: 0.4;
}

/* --- Syntax Highlighting --- */
.syn-keyword { color: #c678dd; }
.syn-string { color: #98c379; }
.syn-number { color: #d19a66; }
.syn-comment { color: #5c6370; font-style: italic; }
.syn-function { color: #61afef; }
.syn-property { color: #e06c75; }
.syn-operator { color: #56b6c2; }
.syn-variable { color: #e5c07b; }
.syn-param { color: #d19a66; font-style: italic; }
.syn-method { color: #61afef; }
.syn-dom { color: #e06c75; }
.syn-bool { color: #d19a66; }

/* --- Output Block --- */
.output-block {
  background: #0a0e14;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1rem 0 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-green);
  line-height: 1.7;
  white-space: pre-wrap;
}

.output-block .output-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
  display: block;
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 30px rgba(46, 145, 247, 0.05);
}

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

/* --- Achievement Cards (about page) --- */
.achievement-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  border-left: 3px solid var(--accent-green);
  transition: all var(--transition-normal);
}

.achievement-card:hover {
  border-left-color: var(--accent-teal);
  box-shadow: 0 0 20px rgba(46, 145, 247, 0.05);
  transform: translateX(4px);
}

.achievement-card .status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-green);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.achievement-card .vuln-type {
  color: var(--text-primary);
  font-weight: 500;
  margin: 0.25rem 0;
}

.achievement-card .vuln-id {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* --- Info/Stat Cards --- */
.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  text-align: center;
}

.info-card .info-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}

.info-card .info-value {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent-green);
  font-weight: 600;
}

/* --- Diagrams --- */
.diagram {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 2rem;
  margin: 1.5rem 0;
  overflow-x: auto;
}

.diagram-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 1rem;
  display: block;
}

/* --- Client/Server Diagram --- */
.arch-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.arch-box {
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 0.75rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-align: center;
  min-width: 100px;
  background: rgba(255, 255, 255, 0.02);
}

.arch-box.server { border-color: var(--accent-purple); color: var(--accent-purple); }
.arch-box.client { border-color: var(--accent-red); color: var(--accent-red); border-width: 2px; }
.arch-box.neutral { border-color: var(--text-muted); color: var(--text-secondary); }

.arch-arrow {
  font-family: var(--font-mono);
  color: var(--text-muted);
  font-size: 1.2rem;
}

/* --- DOM Tree Diagram --- */
.dom-tree {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 2;
}

.dom-tree .node {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  margin: 0.1rem;
  background: rgba(255, 255, 255, 0.02);
}

.dom-tree .node-doc { border-color: var(--accent-green); color: var(--accent-green); }
.dom-tree .node-el { border-color: var(--accent-teal); color: var(--accent-teal); }
.dom-tree .node-text { border-color: var(--text-muted); color: var(--text-muted); }
.dom-tree .tree-line { color: var(--text-muted); margin: 0 0.25rem; }

/* --- Two-Panel Layout --- */
.two-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.5rem 0;
}

.panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.25rem;
  overflow: hidden;
}

.panel-safe { border-color: var(--accent-green); }
.panel-safe .panel-header { color: var(--accent-green); }
.panel-danger { border-color: var(--accent-red); }
.panel-danger .panel-header { color: var(--accent-red); }

.panel-header {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

/* --- Alert Popup Mockup --- */
.alert-mockup {
  background: #2d2d30;
  border: 1px solid #555;
  border-radius: 8px;
  padding: 1rem;
  margin-top: 0.75rem;
  text-align: center;
  font-family: var(--font-body);
  font-size: 0.85rem;
}

.alert-mockup .alert-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #fff;
}

.alert-mockup .alert-btn {
  background: #0078d4;
  color: white;
  border: none;
  padding: 0.35rem 1.5rem;
  border-radius: 4px;
  margin-top: 0.5rem;
  font-size: 0.8rem;
  cursor: default;
}

/* --- Source/Sink Animated Diagram --- */
.source-sink-diagram {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 2rem;
}

.source-dot {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-orange);
  box-shadow: 0 0 20px rgba(251, 146, 60, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: #000;
  font-weight: 700;
}

.sink-dot {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent-red);
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: #000;
  font-weight: 700;
}

.flow-line {
  width: 3px;
  height: 30px;
  position: relative;
  overflow: hidden;
}

.flow-line::after {
  content: '';
  position: absolute;
  top: -100%;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, transparent, var(--accent-green));
  animation: flowPulse 1.5s ease-in-out infinite;
}

@keyframes flowPulse {
  0% { top: -100%; }
  100% { top: 100%; }
}

.flow-node {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 2px solid var(--accent-teal);
  opacity: 0.5;
}

/* --- Hint System --- */
.hint-container {
  margin: 1.5rem 0;
}

.hint-btn {
  background: transparent;
  border: 1px dashed var(--accent-yellow);
  color: var(--accent-yellow);
  padding: 0.5rem 1.25rem;
  border-radius: 6px;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: all var(--transition-fast);
}

.hint-btn:hover {
  background: rgba(250, 204, 21, 0.05);
  box-shadow: 0 0 15px rgba(250, 204, 21, 0.1);
}

.hint-content {
  display: none;
  margin-top: 0.75rem;
  padding: 1rem 1.25rem;
  background: rgba(250, 204, 21, 0.03);
  border: 1px solid rgba(250, 204, 21, 0.15);
  border-radius: 6px;
  color: var(--accent-yellow);
  font-size: 0.9rem;
}

.hint-content.visible {
  display: block;
}

/* --- Next Section Button --- */
.next-section {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
  padding: 0.75rem 2rem;
  background: linear-gradient(135deg, rgba(46, 145, 247, 0.1), rgba(46, 145, 247, 0.1));
  border: 1px solid var(--accent-green);
  border-radius: 8px;
  color: var(--accent-green);
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  text-decoration: none;
  transition: all var(--transition-normal);
}

.next-section:hover {
  background: linear-gradient(135deg, rgba(46, 145, 247, 0.15), rgba(46, 145, 247, 0.15));
  box-shadow: var(--glow-green);
  transform: translateX(4px);
  color: var(--accent-green);
}

/* --- postMessage Interactive Demo --- */
.pm-demo-panels {
  display: flex;
  align-items: stretch;
  gap: 0;
}

.pm-demo-sender,
.pm-demo-receiver {
  flex: 1;
  min-width: 0;
}

.pm-demo-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0 1rem;
  gap: 0.25rem;
}

#pm-demo-send:hover {
  background: #00cc6a;
  box-shadow: 0 0 20px rgba(46, 145, 247, 0.3);
}

.pm-preset:hover {
  background: rgba(255, 255, 255, 0.05) !important;
  color: var(--text-primary) !important;
}

@media (max-width: 768px) {
  .pm-demo-panels {
    flex-direction: column;
  }
  .pm-demo-arrow {
    flex-direction: row;
    padding: 0.5rem 0;
    transform: rotate(90deg);
  }
}

/* --- Landing Page Styles --- */
.landing-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  text-align: center;
  padding: 2rem;
  position: relative;
}

.landing-page::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  transform: none;
  width: 100%;
  height: 100%;
  background: url('../img/bunny-2x.png') center top / cover no-repeat;
  opacity: 0.22;
  pointer-events: none;
  z-index: 0;
}

.landing-page .main-content {
  margin-left: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  max-width: none;
  padding: 0;
  position: relative;
  z-index: 1;
}

.landing-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 900;
  color: var(--accent-blue);
  text-shadow:
    0 0 40px rgba(46, 145, 247, 0.4),
    0 0 80px rgba(46, 145, 247, 0.2),
    0 0 120px rgba(46, 145, 247, 0.1);
  letter-spacing: 4px;
  line-height: 1.1;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}

.landing-subtitle {
  font-family: var(--font-display);
  font-size: clamp(1rem, 3vw, 1.5rem);
  color: var(--accent-purple);
  font-weight: 500;
  letter-spacing: 3px;
  margin-bottom: 1.5rem;
  text-shadow: var(--glow-purple);
}

.landing-tagline {
  font-family: var(--font-body);
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.start-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 3rem;
  background: linear-gradient(135deg, rgba(46, 145, 247, 0.15), rgba(252, 0, 227, 0.15));
  border: 2px solid var(--accent-blue);
  border-radius: 12px;
  color: var(--accent-blue);
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-decoration: none;
  transition: all var(--transition-normal);
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

.start-btn:hover {
  background: linear-gradient(135deg, rgba(46, 145, 247, 0.25), rgba(252, 0, 227, 0.25));
  box-shadow:
    0 0 30px rgba(46, 145, 247, 0.3),
    0 0 60px rgba(46, 145, 247, 0.1);
  transform: scale(1.05);
  color: var(--accent-blue);
}

.landing-nav {
  margin-top: 3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.landing-nav a {
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  transition: all var(--transition-fast);
}

.landing-nav a:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
}

/* --- Floating XSS Payloads (Landing BG) --- */
.floating-payloads {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.floating-payload {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-green);
  opacity: 0;
  white-space: nowrap;
  animation: floatUp linear infinite;
}

@keyframes floatUp {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% { opacity: 0.45; }
  90% { opacity: 0.45; }
  100% {
    transform: translateY(-100px) rotate(5deg);
    opacity: 0;
  }
}

/* --- About Page Layout --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
}

.about-info .info-item {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  align-items: flex-start;
}

.about-info .info-item .label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-teal);
  min-width: 100px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.about-info .info-item .value {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* --- Checklist --- */
.methodology-checklist {
  list-style: none;
  padding: 0;
  counter-reset: step;
}

.methodology-checklist li {
  counter-increment: step;
  position: relative;
  padding: 1rem 1rem 1rem 3.5rem;
  margin-bottom: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.methodology-checklist li::before {
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  background: rgba(46, 145, 247, 0.1);
  border: 1px solid var(--accent-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-green);
  font-weight: 700;
  line-height: 28px;
  text-align: center;
}

.methodology-checklist li:hover {
  border-color: var(--accent-green);
  box-shadow: 0 0 15px rgba(46, 145, 247, 0.05);
}

/* --- Lab Cards --- */
.lab-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 1.5rem;
  transition: all var(--transition-normal);
  display: block;
  text-decoration: none;
  color: inherit;
}

.lab-card:hover {
  border-color: var(--accent-green);
  box-shadow: 0 0 30px rgba(46, 145, 247, 0.07);
  transform: translateY(-2px);
  color: inherit;
}

.lab-card .lab-number {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--accent-teal);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.lab-card .lab-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.lab-card .lab-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.lab-difficulty {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-weight: 600;
}

.lab-difficulty.beginner {
  background: rgba(46, 145, 247, 0.1);
  color: var(--accent-green);
  border: 1px solid rgba(46, 145, 247, 0.2);
}

.lab-difficulty.intermediate {
  background: rgba(250, 204, 21, 0.1);
  color: var(--accent-yellow);
  border: 1px solid rgba(250, 204, 21, 0.2);
}

.lab-difficulty.advanced {
  background: rgba(239, 68, 68, 0.1);
  color: var(--accent-red);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

/* --- DevTools Mockups --- */
.devtools-mockup {
  background: #1e1e1e;
  border: 1px solid #333;
  border-radius: 8px;
  overflow: hidden;
  margin: 1.5rem 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.devtools-tabs {
  display: flex;
  background: #252526;
  border-bottom: 1px solid #333;
}

.devtools-tab {
  padding: 0.5rem 1rem;
  color: #888;
  border-bottom: 2px solid transparent;
  font-size: 0.75rem;
  cursor: default;
}

.devtools-tab.active {
  color: #e2e8f0;
  border-bottom-color: var(--accent-teal);
}

.devtools-body {
  padding: 1rem;
  min-height: 150px;
  color: #ccc;
  line-height: 1.8;
}

.devtools-body .prompt {
  color: var(--accent-teal);
}

.devtools-body .log-output {
  color: var(--text-secondary);
}

.devtools-body .file-tree {
  color: var(--text-secondary);
}

.devtools-body .file-tree .folder { color: var(--accent-yellow); }
.devtools-body .file-tree .file-js { color: var(--accent-blue); }
.devtools-body .file-tree .file-css { color: var(--accent-purple); }
.devtools-body .file-tree .file-html { color: var(--accent-orange); }

/* --- Breakpoint Markers --- */
.bp-line {
  position: relative;
  padding-left: 2rem;
}

.bp-marker {
  position: absolute;
  left: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  top: 50%;
  transform: translateY(-50%);
}

.bp-marker.breakpoint { background: #3b82f6; }
.bp-marker.logpoint { background: #d946ef; }
.bp-marker.conditional { background: #fb923c; }

/* --- Step Controls Mockup --- */
.step-controls {
  display: flex;
  gap: 0.5rem;
  padding: 0.75rem;
  background: #252526;
  border-radius: 6px;
  margin: 1rem 0;
  border: 1px solid #333;
}

.step-btn {
  width: 32px;
  height: 32px;
  border-radius: 4px;
  border: 1px solid #555;
  background: #333;
  color: var(--accent-teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  cursor: default;
}

/* --- Inline Code --- */
code {
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.06);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-size: 0.85em;
  color: var(--accent-teal);
}

/* --- Tables --- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.data-table th {
  text-align: left;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-color);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-teal);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.data-table td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  color: var(--text-secondary);
}

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* --- Window/Tab Diagram --- */
.window-diagram {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.window-mock {
  background: #1a1a2e;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  width: 280px;
  overflow: hidden;
}

.window-mock .title-bar {
  background: #252540;
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.window-mock .title-bar .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.window-mock .title-bar .dot:nth-child(1) { background: #ef4444; }
.window-mock .title-bar .dot:nth-child(2) { background: #facc15; }
.window-mock .title-bar .dot:nth-child(3) { background: #22c55e; }

.window-mock .title-bar .title-text {
  margin-left: 0.5rem;
  font-family: var(--font-mono);
}

.window-mock .window-body {
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  min-height: 100px;
}

.iframe-box {
  border: 2px dashed var(--accent-purple);
  border-radius: 4px;
  padding: 0.75rem;
  margin-top: 0.5rem;
  font-size: 0.7rem;
  color: var(--accent-purple);
  text-align: center;
}

/* --- PostMessage Diagram --- */
.pm-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding: 1.5rem;
}

.pm-box {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  text-align: center;
  min-width: 160px;
}

.pm-box.sender { border-color: var(--accent-orange); }
.pm-box.sender .pm-label { color: var(--accent-orange); }
.pm-box.receiver { border-color: var(--accent-teal); }
.pm-box.receiver .pm-label { color: var(--accent-teal); }

.pm-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}

.pm-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.pm-arrow {
  font-family: var(--font-mono);
  color: var(--accent-green);
  font-size: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.pm-arrow .arrow-label {
  font-size: 0.65rem;
  color: var(--text-muted);
}

/* --- JS Properties Diagram --- */
.js-properties {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.js-prop-tag {
  padding: 0.5rem 1rem;
  border: 1px solid var(--accent-teal);
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-teal);
  white-space: nowrap;
}

.js-prop-center {
  padding: 0.75rem 1.5rem;
  border: 2px solid var(--accent-green);
  border-radius: 8px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent-green);
  font-weight: 600;
  text-shadow: var(--glow-green);
}

/* --- Mapping Table --- */
.mapping-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.5rem 1rem;
  margin: 1.5rem 0;
  align-items: center;
}

.mapping-from {
  text-align: right;
  font-family: var(--font-body);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.mapping-arrow {
  color: var(--accent-green);
  font-family: var(--font-mono);
}

.mapping-to {
  font-family: var(--font-mono);
  color: var(--accent-teal);
  font-size: 0.85rem;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .main-content {
    padding: 2.5rem 2rem;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .two-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.active {
    display: block;
  }

  .main-content {
    margin-left: 0;
    padding: 4rem 1.25rem 2rem;
  }

  .landing-title {
    font-size: clamp(2rem, 10vw, 3.5rem);
  }

  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.35rem; }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .arch-diagram {
    flex-direction: column;
  }

  .window-diagram {
    flex-direction: column;
    align-items: center;
  }

  .pm-diagram {
    flex-direction: column;
  }

  .mapping-grid {
    grid-template-columns: 1fr;
    gap: 0.25rem;
    text-align: left;
  }

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

/* --- Page Transition --- */
.page-content {
  animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* --- Lab-Specific Styles --- */
.lab-page {
  font-family: var(--font-body);
}

.lab-header {
  text-align: center;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

.lab-header h1 {
  font-size: 1.75rem;
}

/* Lab 1: Team Directory */
.directory-search {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.directory-search input {
  flex: 1;
  padding: 0.75rem 1rem;
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast);
}

.directory-search input:focus {
  border-color: var(--accent-teal);
}

.directory-search button {
  padding: 0.75rem 1.5rem;
  background: var(--accent-teal);
  color: #000;
  border: none;
  border-radius: 6px;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.directory-search button:hover {
  background: var(--accent-green);
}

.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.team-card .role {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-teal);
}

.results-header {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
}

.no-results {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-style: italic;
}

/* Lab 2: StatusHub Widget */
.status-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  max-width: 600px;
  margin: 0 auto;
}

.status-widget .widget-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.widget-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--accent-teal);
  font-weight: 600;
}

.status-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 12px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: rgba(46, 145, 247, 0.1);
  color: var(--accent-green);
  border: 1px solid rgba(46, 145, 247, 0.2);
}

.metric-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.metric-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem;
  text-align: center;
}

.metric-card .metric-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--accent-green);
  font-weight: 700;
}

.metric-card .metric-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 0.25rem;
}

/* Lab 2: Exploit Page */
.exploit-form {
  max-width: 700px;
  margin: 0 auto;
}

.exploit-form label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-teal);
  margin-bottom: 0.5rem;
  letter-spacing: 1px;
}

.exploit-form input,
.exploit-form textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  outline: none;
  margin-bottom: 1.25rem;
  transition: border-color var(--transition-fast);
}

.exploit-form input:focus,
.exploit-form textarea:focus {
  border-color: var(--accent-teal);
}

.exploit-form textarea {
  min-height: 120px;
  resize: vertical;
}

.exploit-form button {
  padding: 0.75rem 2rem;
  background: var(--accent-red);
  color: #fff;
  border: none;
  border-radius: 6px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.exploit-form button:hover {
  background: #dc2626;
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.3);
}

.exploit-iframe {
  width: 100%;
  height: 400px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  margin-top: 1.5rem;
  background: var(--bg-primary);
}

/* Lab 3: Ticket App */
.ticket-app {
  max-width: 800px;
  margin: 0 auto;
}

.ticket-nav {
  display: flex;
  gap: 0.25rem;
  margin-bottom: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.25rem;
}

.ticket-nav a {
  flex: 1;
  text-align: center;
  padding: 0.6rem;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.ticket-nav a.active {
  background: rgba(46, 145, 247, 0.1);
  color: var(--accent-green);
}

.ticket-list {
  list-style: none;
}

.ticket-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: default;
}

.ticket-id {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-purple);
  min-width: 60px;
}

.ticket-title {
  flex: 1;
  color: var(--text-primary);
}

.ticket-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.ticket-status.open { background: rgba(46, 145, 247, 0.1); color: var(--accent-green); }
.ticket-status.progress { background: rgba(250, 204, 21, 0.1); color: var(--accent-yellow); }
.ticket-status.closed { background: rgba(100, 116, 139, 0.1); color: var(--text-muted); }

/* --- Sink Category Styles --- */
.sink-category {
  margin-bottom: 1rem;
}

.sink-category h4 {
  margin-top: 1rem;
}

.sink-category code {
  display: inline;
}

/* --- Keyboard nav focus styles --- */
:focus-visible {
  outline: 2px solid var(--accent-teal);
  outline-offset: 2px;
}