/* ============================================================
   CYBERGUARD · style.css
   Step 2: CSS Variables · Reset · Nav · Ad Zones · Base Layout
   ============================================================ */

/* ── 1. DESIGN TOKENS ──────────────────────────────────────── */
:root {
  /* Colors */
  --bg-base:        #050a0f;
  --bg-surface:     #080f18;
  --bg-card:        #0d1826;
  --bg-card-hover:  #111f33;

  --accent-cyan:    #00f5c4;
  --accent-blue:    #0066ff;
  --accent-red:     #ff2d5b;
  --accent-yellow:  #f0c040;

  --text-primary:   #e8f4ff;
  --text-secondary: #7a9bb5;
  --text-muted:     #3d5a72;

  --border-subtle:  rgba(0, 245, 196, 0.08);
  --border-glow:    rgba(0, 245, 196, 0.25);
  --glass-bg:       rgba(8, 15, 24, 0.75);

  /* Gradients */
  --grad-brand:     linear-gradient(135deg, #00f5c4 0%, #0066ff 100%);
  --grad-hero:      radial-gradient(ellipse 80% 60% at 50% -10%, rgba(0,102,255,0.25) 0%, transparent 70%);
  --grad-card:      linear-gradient(135deg, rgba(0,245,196,0.04) 0%, rgba(0,102,255,0.04) 100%);

  /* Typography */
  --font-display:   'Orbitron', monospace;
  --font-body:      'Syne', sans-serif;
  --font-mono:      'JetBrains Mono', monospace;

  /* Spacing */
  --space-xs:   0.4rem;
  --space-sm:   0.8rem;
  --space-md:   1.6rem;
  --space-lg:   3.2rem;
  --space-xl:   6.4rem;
  --space-2xl: 10rem;

  /* Layout */
  --max-width:  1280px;
  --nav-height: 68px;

  /* Effects */
  --shadow-card:    0 4px 32px rgba(0,0,0,0.6), 0 0 0 1px var(--border-subtle);
  --shadow-glow:    0 0 40px rgba(0, 245, 196, 0.15);
  --radius-card:    12px;
  --radius-btn:     8px;
  --transition:     0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── 2. RESET ───────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; max-width: 100%; }
button { border: none; background: none; cursor: pointer; font: inherit; }

/* ── 3. CONTAINER ───────────────────────────────────────────── */
.container {
  width: min(var(--max-width), 100% - 2 * var(--space-md));
  margin-inline: auto;
}

/* ── 4. AD ZONES ────────────────────────────────────────────── */
.ad-banner {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.ad-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--text-muted);
  border-radius: 4px;
  color: var(--text-muted);
  font: 500 0.7rem var(--font-mono);
  letter-spacing: 0.05em;
  opacity: 0.5;
  text-transform: uppercase;
  background: rgba(0,0,0,0.15);
}

.ad-top        { padding: var(--space-xs) var(--space-md); background: rgba(0,0,0,0.4); }
.ad-top .ad-placeholder        { width: min(728px, 100%); height: 60px; }

.ad-leaderboard { padding: var(--space-md); }
.ad-leaderboard .ad-placeholder { width: min(728px, 100%); height: 90px; }

.ad-rectangle  { padding: var(--space-lg) var(--space-md); display: flex; justify-content: center; }
.ad-rectangle .ad-placeholder  { width: 336px; height: 280px; }

.ad-sidebar    { margin-bottom: var(--space-md); }
.ad-sidebar .ad-placeholder    { width: 300px; height: 250px; }

.ad-footer     { padding: var(--space-md); }
.ad-footer .ad-placeholder     { width: min(728px, 100%); height: 90px; }

/* ── 5. NAVIGATION ──────────────────────────────────────────── */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: background var(--transition), box-shadow var(--transition), backdrop-filter var(--transition);
}

#site-header.scrolled {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--border-subtle), 0 8px 32px rgba(0,0,0,0.4);
}

.navbar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  height: var(--nav-height);
  padding: 0 var(--space-md);
  max-width: var(--max-width);
  margin-inline: auto;
}

/* Brand */
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  flex-shrink: 0;
}

.brand-icon svg { filter: drop-shadow(0 0 8px rgba(0, 245, 196, 0.4)); }

.brand-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.brand-name em {
  font-style: normal;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Desktop Nav Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-left: auto;
}

.nav-link {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: 6px;
  position: relative;
  transition: color var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 1.5px;
  background: var(--accent-cyan);
  border-radius: 2px;
  transition: transform var(--transition);
}

.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after { transform: translateX(-50%) scaleX(1); }
.nav-link.active { color: var(--accent-cyan); }

/* CTA Button */
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  margin-left: var(--space-sm);
  background: var(--grad-brand);
  color: #050a0f;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: var(--radius-btn);
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(0, 245, 196, 0.4);
  filter: brightness(1.1);
}

.nav-cta:active { transform: translateY(0); }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  margin-left: var(--space-sm);
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--space-md);
  transform: translateY(-10px);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition), opacity var(--transition);
}

.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}

.mobile-menu ul { display: flex; flex-direction: column; gap: var(--space-xs); margin-bottom: var(--space-md); }

.mob-link {
  display: block;
  padding: 12px var(--space-sm);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}

.mob-link:hover { color: var(--text-primary); background: var(--border-subtle); }

.mob-cta {
  display: inline-block;
  padding: 12px 28px;
  background: var(--grad-brand);
  color: #050a0f;
  font-weight: 700;
  border-radius: var(--radius-btn);
  text-align: center;
  width: 100%;
}

/* ── 6. SECTION SCAFFOLDING ─────────────────────────────────── */
.section-hero,
.section-tools,
.section-articles,
.section-learning {
  padding-block: var(--space-xl);
  position: relative;
}

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

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyan);
  letter-spacing: 0.12em;
  display: block;
  margin-bottom: var(--space-sm);
  opacity: 0.8;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-sm);
  background: var(--grad-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 560px;
  margin-inline: auto;
}

/* ── 7. HERO — FULL ─────────────────────────────────────────── */
.section-hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding-top: var(--nav-height); overflow: hidden;
}
#heroCanvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
.hero-container {
  display: grid; grid-template-columns: 1fr 420px;
  gap: var(--space-xl); align-items: center;
  position: relative; z-index: 1; padding-block: var(--space-xl);
}
.hero-scanline {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,245,196,0.012) 2px, rgba(0,245,196,0.012) 4px);
  animation: scanMove 12s linear infinite;
}

/* Eyebrow */
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.75rem;
  color: var(--accent-cyan); letter-spacing: 0.14em; text-transform: uppercase;
  margin-bottom: var(--space-md); padding: 6px 14px;
  border: 1px solid rgba(0,245,196,0.2); border-radius: 100px;
  background: rgba(0,245,196,0.04);
  opacity: 0; animation: fadeUp 0.6s 0.1s ease forwards;
}
.eyebrow-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent-cyan); box-shadow: 0 0 8px var(--accent-cyan);
  animation: blink 1.8s ease-in-out infinite;
}
.threat-low { color: #00ff88; font-style: normal; font-weight: 700; }

/* Title */
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3rem, 8vw, 6.5rem);
  font-weight: 900; line-height: 1.0;
  letter-spacing: -0.03em; margin-bottom: var(--space-md);
}
.hero-title .line-1,
.hero-title .line-2,
.hero-title .line-3 {
  display: block; opacity: 0; transform: translateY(32px);
  animation: fadeUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
.hero-title .line-1 { animation-delay: 0.25s; color: var(--text-primary); }
.hero-title .line-2 { animation-delay: 0.45s; color: var(--accent-cyan); text-shadow: 0 0 40px rgba(0,245,196,0.35); }
.hero-title .line-3 { animation-delay: 0.65s; background: var(--grad-brand); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* Typewriter sub */
.hero-sub {
  font-size: clamp(1rem, 1.8vw, 1.1rem); color: var(--text-secondary);
  min-height: 3.5em; margin-bottom: var(--space-lg); max-width: 480px;
  opacity: 0; animation: fadeUp 0.7s 0.85s ease forwards;
}
.type-cursor { display: inline-block; color: var(--accent-cyan); animation: blink 0.9s step-end infinite; }

/* Actions */
.hero-actions {
  display: flex; gap: var(--space-md); flex-wrap: wrap;
  margin-bottom: var(--space-xl);
  opacity: 0; animation: fadeUp 0.7s 1.05s ease forwards;
}
.btn-icon { font-size: 0.8em; opacity: 0.7; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; background: var(--grad-brand);
  color: #050a0f; font-weight: 700; font-size: 0.95rem;
  border-radius: var(--radius-btn);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative; overflow: hidden;
}
.btn-primary::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.3) 50%, transparent 100%);
  transform: translateX(-100%); transition: transform 0.5s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(0,245,196,0.4); }
.btn-primary:hover::after { transform: translateX(100%); }

.btn-ghost {
  display: inline-block;
  padding: 14px 36px;
  border: 1px solid var(--border-glow);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius-btn);
  transition: background var(--transition), border-color var(--transition);
}

.btn-ghost:hover { background: var(--border-subtle); border-color: var(--accent-cyan); }

.hero-stats {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.7s 1.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* Stats */
.hero-stats {
  display: flex; align-items: center; gap: var(--space-md); flex-wrap: wrap;
  opacity: 0; animation: fadeUp 0.7s 1.25s ease forwards;
}
.stat-num {
  font-family: var(--font-display); font-size: 1.5rem;
  font-weight: 700; color: var(--accent-cyan); display: block;
}
.stat-label {
  font-size: 0.72rem; color: var(--text-muted);
  font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.08em;
}
.stat-div { width: 1px; height: 40px; background: var(--border-subtle); }

/* Hero background */
.hero-grid {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,245,196,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,245,196,0.045) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: linear-gradient(to bottom, transparent 0%, black 25%, black 65%, transparent 100%);
}
.hero-glow {
  position: absolute; top: -10%; left: 30%; transform: translateX(-50%);
  width: 900px; height: 700px;
  background: radial-gradient(ellipse, rgba(0,102,255,0.22) 0%, transparent 65%);
  z-index: 0; pointer-events: none;
  animation: pulseGlow 7s ease-in-out infinite alternate;
}

/* ── Terminal Widget ─────────────────────────────────────── */
.hero-terminal {
  background: rgba(5,10,15,0.9);
  border: 1px solid var(--border-glow);
  border-radius: 12px;
  box-shadow: 0 0 0 1px rgba(0,245,196,0.06), 0 24px 64px rgba(0,0,0,0.7), var(--shadow-glow);
  overflow: hidden;
  font-family: var(--font-mono);
  opacity: 0;
  animation: fadeUp 0.8s 1.4s ease forwards;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.terminal-header {
  display: flex; align-items: center; gap: 7px;
  padding: 11px 14px;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid var(--border-subtle);
}
.t-dot { width: 11px; height: 11px; border-radius: 50%; }
.t-red    { background: #ff5f57; }
.t-yellow { background: #ffbd2e; }
.t-green  { background: #28c840; }
.t-title { margin-left: 8px; font-size: 0.72rem; color: var(--text-muted); letter-spacing: 0.06em; }
.terminal-body {
  padding: 16px; min-height: 280px; max-height: 320px;
  overflow-y: auto; font-size: 0.78rem; line-height: 1.9;
  scrollbar-width: thin; scrollbar-color: var(--border-subtle) transparent;
}
.terminal-body::-webkit-scrollbar { width: 4px; }
.terminal-body::-webkit-scrollbar-thumb { background: var(--border-subtle); border-radius: 4px; }

.t-line { display: block; color: var(--text-secondary); }
.t-line.success { color: #00f5c4; }
.t-line.warn    { color: #f0c040; }
.t-line.danger  { color: #ff2d5b; }
.t-line.info    { color: #7a9bb5; }
.t-line.dim     { color: var(--text-muted); opacity: 0.6; }

.terminal-footer {
  display: flex; align-items: center; gap: 6px;
  padding: 10px 16px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.78rem;
}
.t-prompt { color: var(--accent-cyan); }
.t-input  { color: var(--text-primary); flex: 1; }
.t-blink  { color: var(--accent-cyan); animation: blink 1s step-end infinite; }

/* Scroll hint */
.hero-scroll-hint {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.18em;
  color: var(--text-muted); z-index: 2;
  opacity: 0; animation: fadeIn 1s 2s ease forwards;
}
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(to bottom, var(--accent-cyan), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* ── Hero responsive ── */
@media (max-width: 1024px) {
  .hero-container { grid-template-columns: 1fr; }
  .hero-terminal { max-width: 480px; }
}
@media (max-width: 768px) {
  .hero-terminal { display: none; }
  .hero-scroll-hint { display: none; }
  .hero-stats { gap: var(--space-sm); }
  .stat-div { display: none; }
}

/* ── 8. SKELETON LOADERS ────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--bg-card) 25%, var(--bg-card-hover) 50%, var(--bg-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.8s infinite;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-subtle);
  min-height: 220px;
}

/* ── 9. ARTICLES ────────────────────────────────────────────── */
.articles-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--space-lg);
  align-items: start;
}

/* Article card */
.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.article-card::before {
  content: '';
  position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--grad-brand);
  opacity: 0;
  transition: opacity var(--transition);
}
.article-card:hover {
  border-color: var(--border-glow);
  transform: translateX(4px);
  box-shadow: var(--shadow-card);
}
.article-card:hover::before { opacity: 1; }

.article-featured {
  background: linear-gradient(135deg, rgba(0,102,255,0.06), rgba(0,245,196,0.03));
  border-color: rgba(0,245,196,0.12);
  padding: 2rem;
}
.article-featured .article-title a { font-size: 1.2rem; }

.article-badge {
  display: flex; align-items: center; gap: 0.8rem;
}
.art-tag {
  font: 700 0.62rem var(--font-mono);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.art-tag--critical { background: rgba(255,45,91,0.15); color: #ff2d5b; }
.art-tag--high     { background: rgba(240,192,64,0.15); color: #f0c040; }
.art-tag--medium   { background: rgba(79,195,247,0.15); color: #4fc3f7; }
.art-tag--research { background: rgba(0,245,196,0.12);  color: var(--accent-cyan); }

.art-date {
  font: 400 0.72rem var(--font-mono);
  color: var(--text-muted);
}

.article-title a {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.01em;
  line-height: 1.4;
  text-decoration: none;
  transition: color var(--transition);
}
.article-title a:hover { color: var(--accent-cyan); }

.article-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.article-meta {
  display: flex; align-items: center; gap: 1rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border-subtle);
  font: 400 0.72rem var(--font-mono);
  color: var(--text-muted);
  flex-wrap: wrap;
}
.art-author { display: flex; align-items: center; gap: 0.5rem; color: var(--text-secondary); }
.author-avatar {
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--grad-brand);
  display: inline-flex; align-items: center; justify-content: center;
  font: 700 0.55rem var(--font-mono);
  color: #050a0f; flex-shrink: 0;
}
.articles-main { display: flex; flex-direction: column; gap: 1rem; }

.articles-view-all {
  display: inline-flex; align-items: center; gap: 8px;
  font: 600 0.82rem var(--font-mono);
  color: var(--accent-cyan);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 1rem 0;
  transition: gap var(--transition);
}
.articles-view-all:hover { gap: 12px; }

/* ── SIDEBAR ─────────────────────────────────────────────────── */
.articles-sidebar {
  display: flex; flex-direction: column; gap: var(--space-md);
  position: sticky; top: calc(var(--nav-height) + 20px);
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 1.4rem;
}

.widget-header {
  display: flex; align-items: center; gap: 0.6rem;
  margin-bottom: 1rem;
}
.widget-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 6px rgba(0,245,196,0.5);
  animation: blink 2s ease-in-out infinite;
  flex-shrink: 0;
}
.widget-header h3 {
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

/* CVE List */
.cve-list { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1rem; }
.cve-item {
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.5rem 0.6rem;
  border-radius: 6px;
  background: rgba(255,255,255,0.02);
  border: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
  cursor: pointer;
}
.cve-item:hover { border-color: var(--border-subtle); background: var(--bg-card-hover); }
.cve-score {
  font: 700 0.72rem var(--font-mono);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  flex-shrink: 0; min-width: 36px; text-align: center;
}
.cve-critical { background: rgba(255,45,91,0.2);  color: #ff2d5b; }
.cve-high     { background: rgba(240,192,64,0.2); color: #f0c040; }
.cve-medium   { background: rgba(79,195,247,0.2); color: #4fc3f7; }

.cve-info { display: flex; flex-direction: column; gap: 1px; flex: 1; min-width: 0; }
.cve-id   { font: 600 0.68rem var(--font-mono); color: var(--text-secondary); }
.cve-name { font: 400 0.7rem var(--font-body); color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.cve-new  { font: 700 0.58rem var(--font-mono); color: #ff2d5b; letter-spacing: 0.08em; flex-shrink: 0; }

.widget-link {
  font: 500 0.72rem var(--font-mono);
  color: var(--accent-cyan);
  letter-spacing: 0.05em;
  transition: opacity var(--transition);
}
.widget-link:hover { opacity: 0.7; }

/* Trending */
.trending-list { display: flex; flex-direction: column; gap: 0.4rem; }
.trending-item {
  display: flex; align-items: center; gap: 0.7rem;
  padding: 0.45rem 0.5rem;
  border-radius: 6px;
  transition: background var(--transition);
  text-decoration: none;
}
.trending-item:hover { background: rgba(255,255,255,0.03); }
.trend-num { font: 700 0.65rem var(--font-mono); color: var(--text-muted); width: 18px; }
.trend-tag { font: 600 0.78rem var(--font-body); color: var(--text-secondary); flex: 1; }
.trend-count { font: 400 0.65rem var(--font-mono); color: var(--text-muted); }

/* Newsletter */
.widget-newsletter { background: linear-gradient(135deg, rgba(0,102,255,0.08), rgba(0,245,196,0.04)); }
.widget-newsletter h3 {
  font-family: var(--font-display); font-size: 0.9rem;
  font-weight: 700; margin-bottom: 0.5rem; color: var(--text-primary);
}
.widget-newsletter p { font-size: 0.82rem; color: var(--text-secondary); margin-bottom: 1rem; }

.newsletter-form { display: flex; flex-direction: column; gap: 0.6rem; }
.newsletter-form input {
  padding: 0.65rem 0.9rem;
  background: rgba(5,10,15,0.6);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  color: var(--text-primary);
  font: 400 0.82rem var(--font-body);
  outline: none;
  transition: border-color var(--transition);
}
.newsletter-form input:focus { border-color: var(--border-glow); }
.nl-btn { padding: 0.65rem; width: 100%; font-size: 0.82rem; text-align: center; }
.nl-note { font: 400 0.68rem var(--font-mono); color: var(--text-muted); margin-top: 0.4rem; text-align: center; }

/* ── 10. LEARNING ────────────────────────────────────────────── */
.learning-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  align-items: start;
}

.learn-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.learn-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}
.learn-card--featured {
  border-color: rgba(0,245,196,0.2);
  background: linear-gradient(160deg, rgba(0,102,255,0.07), rgba(0,245,196,0.04));
}

.learn-card-top {
  padding: 1.6rem;
  display: flex; align-items: flex-start; justify-content: space-between;
  position: relative;
}
.learn-beginner    { background: linear-gradient(135deg, rgba(0,245,196,0.12), rgba(0,102,255,0.06)); }
.learn-intermediate{ background: linear-gradient(135deg, rgba(0,102,255,0.15), rgba(0,245,196,0.08)); }
.learn-advanced    { background: linear-gradient(135deg, rgba(255,45,91,0.1),  rgba(240,192,64,0.06)); }

.learn-level-badge {
  font: 700 0.62rem var(--font-mono);
  letter-spacing: 0.12em;
  color: var(--text-muted);
}
.learn-icon { font-size: 2rem; line-height: 1; }
.learn-popular-badge {
  position: absolute; top: 12px; right: 12px;
  font: 700 0.58rem var(--font-mono);
  background: var(--accent-cyan);
  color: #050a0f; padding: 0.2rem 0.5rem;
  border-radius: 4px; letter-spacing: 0.08em;
}

.learn-card-body { padding: 1.4rem; flex: 1; display: flex; flex-direction: column; gap: 0.9rem; }
.learn-card-body h3 {
  font-family: var(--font-display);
  font-size: 1rem; font-weight: 700;
  color: var(--text-primary); line-height: 1.3;
}
.learn-card-body p { font-size: 0.845rem; color: var(--text-secondary); line-height: 1.65; }

.learn-modules { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.lm-item {
  font: 400 0.68rem var(--font-mono);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.06);
  color: var(--text-muted);
}
.lm-done {
  background: rgba(0,245,196,0.08);
  border-color: rgba(0,245,196,0.15);
  color: var(--accent-cyan);
}

.learn-meta {
  display: flex; gap: 1rem; flex-wrap: wrap;
  font: 400 0.72rem var(--font-mono);
  color: var(--text-muted);
  padding-top: 0.6rem;
  border-top: 1px solid var(--border-subtle);
}
.learn-students { color: var(--accent-cyan); margin-left: auto; }

.learn-progress-wrap {
  height: 3px; border-radius: 3px;
  background: rgba(255,255,255,0.06);
  overflow: hidden;
}
.learn-progress-bar {
  height: 100%;
  background: var(--grad-brand);
  border-radius: 3px;
  transition: width 1.2s cubic-bezier(0.4,0,0.2,1);
  box-shadow: 0 0 6px rgba(0,245,196,0.4);
}

.learn-cta {
  display: block;
  padding: 1rem 1.4rem;
  border-top: 1px solid var(--border-subtle);
  font: 600 0.78rem var(--font-mono);
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: background var(--transition), padding-left var(--transition);
}
.learn-cta:hover { background: rgba(0,245,196,0.06); padding-left: 1.8rem; }

/* ── 11. FOOTER ─────────────────────────────────────────────── */
#site-footer {
  border-top: 1px solid var(--border-subtle);
  margin-top: var(--space-xl);
  background: var(--bg-surface);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--space-xl);
  padding-block: var(--space-xl);
}

.footer-brand p {
  margin-top: var(--space-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  max-width: 300px;
}

.footer-links { display: flex; gap: var(--space-xl); }

.footer-col h3 {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.footer-col ul { display: flex; flex-direction: column; gap: var(--space-xs); }
.footer-col a { color: var(--text-secondary); font-size: 0.9rem; transition: color var(--transition); }
.footer-col a:hover { color: var(--accent-cyan); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: var(--space-md);
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.825rem;
}

.footer-mono { font-family: var(--font-mono); font-size: 0.75rem; }
.status-ok { color: var(--accent-cyan); }

/* ── 12. REVEAL ANIMATIONS ──────────────────────────────────── */
.reveal-section { opacity: 0; transform: translateY(24px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal-section.visible { opacity: 1; transform: translateY(0); }

/* ── 13. TOOLS GRID SCAFFOLD ────────────────────────────────── */
.tools-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }

/* ── HOME TOOL CARDS ─────────────────────────────────────────── */
.tool-card-home {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.2rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.tool-card-home::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--grad-brand);
  opacity: 0;
  transition: opacity var(--transition);
}
.tool-card-home:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow), var(--shadow-card);
}

.tch-icon {
  width: 44px; height: 44px; border-radius: 10px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  border: 1px solid var(--border-subtle);
}
.tch-icon.cyan   { background: rgba(0,245,196,0.1);  border-color: rgba(0,245,196,0.2); }
.tch-icon.blue   { background: rgba(0,102,255,0.12); border-color: rgba(0,102,255,0.25); }
.tch-icon.red    { background: rgba(255,45,91,0.1);  border-color: rgba(255,45,91,0.2); }
.tch-icon.yellow { background: rgba(240,192,64,0.1); border-color: rgba(240,192,64,0.2); }

.tch-body { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.tch-name { font: 600 0.9rem var(--font-display); color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tch-cat  { font: 400 0.7rem var(--font-mono);  color: var(--text-muted); }

.tch-badge {
  font: 700 0.62rem var(--font-mono);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  flex-shrink: 0;
}
.tch-badge.free { background: rgba(0,245,196,0.12); color: var(--accent-cyan); }
.tch-badge.pro  { background: rgba(0,102,255,0.15); color: #5599ff; }
.tch-badge.hot  { background: rgba(240,192,64,0.12); color: var(--accent-yellow); }

.tools-cta-row {
  display: flex;
  justify-content: center;
  margin-top: var(--space-lg);
}

/* ── 14. KEYFRAMES ──────────────────────────────────────────── */
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { to { opacity: 1; } }

@keyframes shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes pulseGlow {
  from { opacity: 0.5; transform: translateX(-50%) scale(1); }
  to   { opacity: 1;   transform: translateX(-50%) scale(1.15); }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

@keyframes scanMove {
  0%   { background-position: 0 0; }
  100% { background-position: 0 200px; }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.2); }
}

/* ── 15. RESPONSIVE ─────────────────────────────────────────── */
@media (max-width: 1024px) {
  .articles-layout { grid-template-columns: 1fr; }
  .articles-sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .sidebar-widget { flex: 1 1 280px; }
  .learning-grid { grid-template-columns: repeat(2, 1fr); }
  .tools-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu { display: block; }

  .footer-inner { grid-template-columns: 1fr; gap: var(--space-lg); }
  .footer-links { gap: var(--space-lg); }
  .footer-bottom { flex-direction: column; gap: var(--space-xs); text-align: center; }

  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-stats { gap: var(--space-sm); }
  .stat-div { display: none; }
  .stat { flex: 1 0 auto; }
}

@media (max-width: 480px) {
  .tools-grid { grid-template-columns: 1fr; }
  .learning-grid { grid-template-columns: 1fr; }
  .ad-rectangle .ad-placeholder { width: 100%; }
}