/* ========================================
   KubioSec - Dark Theme Stylesheet
   ======================================== */

/* CSS Variables */
:root {
  /* Colors - Dark tech aesthetic */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a25;
  --bg-card: #15151f;
  --bg-hover: #1e1e2a;

  /* Accent colors - Flashy Neon Green theme */
  --accent-primary: #CCFF00;
  --accent-secondary: #BFFF00;
  --accent-gradient: linear-gradient(135deg, #CCFF00 0%, #D0FF00 50%, #BFFF00 100%);
  --accent-glow: 0 0 25px rgba(204, 255, 0, 0.4);

  /* Text colors */
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b0;
  --text-muted: #6a6a7a;
  --text-accent: #CCFF00;

  /* Borders */
  --border-color: #2a2a3a;
  --border-accent: #CCFF00;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 5rem;

  /* Typography */
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  --font-heading: 'Inter', sans-serif;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;

  /* Container */
  --container-width: 1200px;
  --container-padding: 2rem;
}

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

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

body {
  font-family: var(--font-main);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

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

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

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

/* ========================================
   Header & Navigation
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-image {
  height: 40px;
  width: auto;
  transition: filter var(--transition-fast);
}

.logo:hover .logo-image {
  filter: drop-shadow(0 0 8px rgba(57, 255, 20, 0.5));
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
}

.logo span {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
}

.nav-menu a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-accent);
  background: rgba(57, 255, 20, 0.1);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 70px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(204, 255, 0, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(191, 255, 0, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: rgba(204, 255, 0, 0.1);
  border: 1px solid rgba(204, 255, 0, 0.3);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 50px;
  font-size: 0.85rem;
  color: var(--text-accent);
  margin-bottom: var(--spacing-lg);
}

.hero-badge::before {
  content: '🛡️';
}

.hero h1 {
  font-size: clamp(2rem, 5.5vw, 4rem);
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  text-align: center;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero h1 .highlight {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xl);
  max-width: 100%;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* Scroll Down Indicator */
.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  cursor: pointer;
  animation: bounce 2s infinite;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.scroll-indicator.hidden {
  opacity: 0;
  pointer-events: none;
}

.scroll-chevron {
  width: 40px;
  height: 24px;
  color: var(--accent-primary);
  filter: drop-shadow(0 0 8px rgba(204, 255, 0, 0.5));
  transition: transform 0.3s ease;
}

.scroll-indicator:hover .scroll-chevron {
  transform: translateY(4px);
  filter: drop-shadow(0 0 12px rgba(204, 255, 0, 0.8));
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(10px);
  }
  60% {
    transform: translateX(-50%) translateY(5px);
  }
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--accent-gradient);
  color: var(--bg-primary);
  box-shadow: var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(57, 255, 20, 0.4);
  color: var(--bg-primary);
}

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

.btn-secondary:hover {
  border-color: var(--accent-primary);
  color: var(--text-accent);
  background: rgba(57, 255, 20, 0.05);
}

/* ========================================
   Sections
   ======================================== */
.section {
  padding: var(--spacing-xxl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-header h2 {
  margin-bottom: var(--spacing-sm);
}

.section-header p {
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   Cards
   ======================================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

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

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

.card-icon {
  width: 50px;
  height: 50px;
  background: rgba(57, 255, 20, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.card h3 {
  margin-bottom: var(--spacing-sm);
}

.card-meta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.card-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-md);
}

.tag {
  background: rgba(57, 255, 20, 0.1);
  color: var(--text-accent);
  padding: 0.25rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* ========================================
   Services Section
   ======================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
}

.service-card:hover {
  border-color: var(--accent-primary);
  transform: translateY(-4px);
}

.service-icon {
  width: 70px;
  height: 70px;
  background: var(--accent-gradient);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  margin: 0 auto var(--spacing-md);
}

.service-card h3 {
  margin-bottom: var(--spacing-sm);
}

.service-card ul {
  list-style: none;
  text-align: left;
  margin-top: var(--spacing-md);
}

.service-card li {
  padding: var(--spacing-xs) 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.service-card li::before {
  content: '→';
  color: var(--text-accent);
}

/* ========================================
   About Section
   ======================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image-placeholder {
  width: 100%;
  aspect-ratio: 1;
  background: var(--bg-tertiary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  border: 1px solid var(--border-color);
}

.about-content h2 {
  margin-bottom: var(--spacing-md);
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-accent);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========================================
   Content Pages (Talks, Meetups, Blog)
   ======================================== */
.page-header {
  padding: calc(70px + var(--spacing-xxl)) 0 var(--spacing-xl);
  text-align: center;
  /* Green gradient fading from top-left to bottom-right */
  background: linear-gradient(
    135deg,
    rgba(204, 255, 0, 0.15) 0%,
    rgba(191, 255, 0, 0.08) 25%,
    rgba(57, 255, 20, 0.03) 50%,
    var(--bg-secondary) 75%,
    var(--bg-primary) 100%
  );
  border-bottom: 1px solid rgba(204, 255, 0, 0.2);
  position: relative;
  overflow: hidden;
}

/* Matrix/Hacker style grid overlay */
.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    /* Grid pattern */
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 6px,
      rgba(204, 255, 0, 0.04) 6px,
      rgba(204, 255, 0, 0.04) 7px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 6px,
      rgba(204, 255, 0, 0.04) 6px,
      rgba(204, 255, 0, 0.04) 7px
    );
  /* Fade the grid from top-left to bottom-right */
  mask-image: linear-gradient(135deg, rgba(0,0,0,1) 0%, rgba(0,0,0,0.5) 40%, rgba(0,0,0,0) 70%);
  -webkit-mask-image: linear-gradient(135deg, rgba(0,0,0,1) 0%, rgba(0,0,0,0.5) 40%, rgba(0,0,0,0) 70%);
  pointer-events: none;
  z-index: 0;
}

/* Random glowing boxes effect - stronger in top-left */
.page-header::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    /* Top-left cluster - brighter */
    radial-gradient(3px 3px at 20px 30px, rgba(204, 255, 0, 0.7), transparent),
    radial-gradient(2px 2px at 45px 50px, rgba(204, 255, 0, 0.6), transparent),
    radial-gradient(3px 3px at 70px 25px, rgba(204, 255, 0, 0.65), transparent),
    radial-gradient(2px 2px at 30px 80px, rgba(204, 255, 0, 0.55), transparent),
    radial-gradient(3px 3px at 90px 60px, rgba(204, 255, 0, 0.6), transparent),
    radial-gradient(2px 2px at 120px 35px, rgba(204, 255, 0, 0.5), transparent),
    radial-gradient(3px 3px at 60px 110px, rgba(204, 255, 0, 0.55), transparent),
    radial-gradient(2px 2px at 150px 70px, rgba(204, 255, 0, 0.45), transparent),
    radial-gradient(3px 3px at 100px 100px, rgba(204, 255, 0, 0.5), transparent),
    radial-gradient(2px 2px at 180px 45px, rgba(204, 255, 0, 0.4), transparent),
    /* Mid section - medium brightness */
    radial-gradient(2px 2px at 200px 90px, rgba(204, 255, 0, 0.35), transparent),
    radial-gradient(3px 3px at 250px 50px, rgba(204, 255, 0, 0.4), transparent),
    radial-gradient(2px 2px at 220px 130px, rgba(204, 255, 0, 0.3), transparent),
    radial-gradient(2px 2px at 300px 80px, rgba(204, 255, 0, 0.35), transparent),
    radial-gradient(3px 3px at 280px 120px, rgba(204, 255, 0, 0.3), transparent),
    radial-gradient(2px 2px at 350px 60px, rgba(204, 255, 0, 0.25), transparent),
    radial-gradient(2px 2px at 320px 150px, rgba(204, 255, 0, 0.2), transparent),
    radial-gradient(3px 3px at 400px 100px, rgba(204, 255, 0, 0.25), transparent),
    /* Scattered further - dimmer */
    radial-gradient(2px 2px at 450px 70px, rgba(204, 255, 0, 0.2), transparent),
    radial-gradient(2px 2px at 500px 130px, rgba(204, 255, 0, 0.15), transparent),
    radial-gradient(2px 2px at 550px 50px, rgba(204, 255, 0, 0.18), transparent),
    radial-gradient(2px 2px at 600px 110px, rgba(204, 255, 0, 0.12), transparent),
    radial-gradient(2px 2px at 700px 80px, rgba(204, 255, 0, 0.1), transparent),
    radial-gradient(2px 2px at 800px 60px, rgba(204, 255, 0, 0.08), transparent),
    radial-gradient(2px 2px at 130px 160px, rgba(204, 255, 0, 0.35), transparent),
    radial-gradient(2px 2px at 170px 140px, rgba(204, 255, 0, 0.3), transparent),
    radial-gradient(2px 2px at 50px 150px, rgba(204, 255, 0, 0.4), transparent),
    radial-gradient(3px 3px at 80px 180px, rgba(204, 255, 0, 0.35), transparent);
  pointer-events: none;
  z-index: 0;
  animation: flicker 4s infinite;
}

@keyframes flicker {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
  52% { opacity: 1; }
  54% { opacity: 0.85; }
  56% { opacity: 1; }
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header h1 {
  margin-bottom: var(--spacing-sm);
  text-shadow: 0 0 20px rgba(57, 255, 20, 0.3);
}

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

.content-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
  display: block;
  color: inherit;
}

.content-item:hover {
  border-color: var(--accent-primary);
  transform: translateX(8px);
  color: inherit;
}

.content-item h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.content-item p {
  margin-bottom: var(--spacing-sm);
}

/* Single content page */
.single-content {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--container-padding);
}

.single-content h1 {
  margin-bottom: var(--spacing-md);
}

.single-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
}

.single-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.content-body {
  color: var(--text-secondary);
  line-height: 1.8;
}

.content-body h2,
.content-body h3,
.content-body h4 {
  color: var(--text-primary);
  margin-top: var(--spacing-xl);
}

.content-body ul,
.content-body ol {
  margin-left: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.content-body li {
  margin-bottom: var(--spacing-xs);
}

.content-body code {
  background: var(--bg-tertiary);
  padding: 0.2em 0.4em;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.9em;
}

.content-body pre {
  background: var(--bg-tertiary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

.content-body pre code {
  background: none;
  padding: 0;
}

.content-body blockquote {
  border-left: 4px solid var(--accent-primary);
  padding-left: var(--spacing-md);
  margin: var(--spacing-md) 0;
  color: var(--text-muted);
  font-style: italic;
}

.content-body a {
  color: var(--text-accent);
  text-decoration: underline;
}

.content-body img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: var(--spacing-md) 0;
}

/* ========================================
   Book Section
   ======================================== */
.book-promo {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--spacing-xxl);
  align-items: center;
}

.book-cover {
  background: var(--accent-gradient);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  color: var(--bg-primary);
}

.book-cover h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.book-cover-icon {
  font-size: 5rem;
  margin-bottom: var(--spacing-md);
}

.book-info h2 {
  margin-bottom: var(--spacing-md);
}

.book-chapters {
  margin-top: var(--spacing-lg);
}

.book-chapters h4 {
  margin-bottom: var(--spacing-sm);
  color: var(--text-accent);
}

.book-chapters ul {
  list-style: none;
}

.book-chapters li {
  padding: var(--spacing-xs) 0;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.book-chapters li::before {
  content: '📖';
  font-size: 0.8rem;
}

/* ========================================
   Contact Section
   ======================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xxl);
}

.contact-info h2 {
  margin-bottom: var(--spacing-md);
}

.contact-methods {
  margin-top: var(--spacing-xl);
}

.contact-method {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border-color);
}

.contact-method-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, rgba(204, 255, 0, 0.15), rgba(191, 255, 0, 0.1));
  border: 1px solid rgba(204, 255, 0, 0.2);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  font-weight: 600;
  flex-shrink: 0;
  color: var(--accent-primary);
}

.contact-method-icon svg {
  width: 100%;
  height: 100%;
  padding: 12px;
}

.contact-method-text h4 {
  margin-bottom: 0;
  color: var(--text-primary);
}

.contact-method-text p {
  margin-bottom: 0;
  color: var(--text-muted);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.social-link {
  width: 45px;
  height: 45px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.social-link:hover {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--bg-primary);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-brand .logo {
  margin-bottom: var(--spacing-md);
}

.footer-brand p {
  font-size: 0.9rem;
}

.footer-column h4 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: var(--spacing-xs);
}

.footer-column a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--text-accent);
}

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ========================================
   404 Page
   ======================================== */
.error-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 70px;
}

.error-code {
  font-size: 8rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--spacing-md);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
  .about-grid,
  .book-promo,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

  /* Training page hero responsive */
  .hero-content[style*="grid-template-columns"] {
    grid-template-columns: 1fr !important;
    text-align: center;
  }

  .agentic-warrior-container {
    order: -1;
    margin-bottom: 2rem;
  }

  .agentic-warrior {
    width: 180px !important;
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: none;
  }

  .nav-menu.active {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .hero-buttons {
    flex-direction: column;
  }

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

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

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

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* Scrollbar styling */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-secondary);
}