/* ============================================================
   SQL INJECTION GUIDE — PAGE STYLES
   Premium dark-mode design matching the LearnHub LMS theme.
   ============================================================ */

/* ─────────────────────── HERO ─────────────────────── */
.sqli-hero {
  position: relative;
  overflow: hidden;
  padding: 120px 5% 80px;
  text-align: center;
  background: var(--gradient-hero);
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sqli-hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(239, 68, 68, 0.12) 0%, transparent 70%);
  pointer-events: none;
  animation: sqli-glow-pulse 6s ease-in-out infinite;
}

@keyframes sqli-glow-pulse {
  0%, 100% { opacity: 0.6; transform: translateX(-50%) scale(1); }
  50% { opacity: 1; transform: translateX(-50%) scale(1.15); }
}

.sqli-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.sqli-hero-content {
  position: relative;
  z-index: 2;
  max-width: 750px;
  margin: 0 auto;
}

.sqli-hero-content h1 {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 900;
  margin-bottom: 24px;
  line-height: 1.15;
}

.sqli-hero-content h1 span {
  background: linear-gradient(135deg, #ef4444 0%, #f59e0b 50%, #8b5cf6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sqli-hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 580px;
  margin: 0 auto 40px;
}

.sqli-hero-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.sqli-stat {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  transition: var(--transition);
}

.sqli-stat:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.sqli-stat-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(239, 68, 68, 0.1);
  color: var(--danger);
  font-size: 1.1rem;
}

.sqli-stat-num {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 1.3rem;
  font-weight: 900;
  color: var(--text-primary);
}

.sqli-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.sqli-hero-cta {
  animation: sqli-cta-bounce 2s ease-in-out infinite;
}

@keyframes sqli-cta-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* ─────────────── TABLE OF CONTENTS ─────────────── */
.sqli-toc-section {
  padding: 0 5%;
  margin-top: -40px;
  position: relative;
  z-index: 10;
}

.sqli-toc {
  max-width: 900px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-card);
}

.sqli-toc-header {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.sqli-toc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.sqli-toc-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--radius);
  background: rgba(255,255,255,0.02);
  border: 1px solid transparent;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary) !important;
  transition: var(--transition);
}

.sqli-toc-item:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--border-accent);
  color: var(--text-primary) !important;
  transform: translateY(-2px);
}

.sqli-toc-item i:last-child {
  margin-left: auto;
  font-size: 0.7rem;
  opacity: 0;
  transition: var(--transition);
}

.sqli-toc-item:hover i:last-child {
  opacity: 1;
  transform: translateX(3px);
}

.sqli-toc-num {
  min-width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(139, 92, 246, 0.1);
  color: var(--accent-light);
  font-size: 0.72rem;
  font-weight: 700;
  flex-shrink: 0;
}

/* ──────────────── TYPE BLOCKS ──────────────── */
.sqli-type-block {
  max-width: 1000px;
  margin: 0 auto 60px;
  padding: 40px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.sqli-type-block::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.sqli-type-block:nth-child(1)::before { background: linear-gradient(90deg, #ef4444, #f97316); }
.sqli-type-block:nth-child(2)::before { background: linear-gradient(90deg, #f59e0b, #eab308); }
.sqli-type-block:nth-child(3)::before { background: linear-gradient(90deg, #3b82f6, #06b6d4); }

.sqli-type-header {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 20px;
}

.sqli-type-badge {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.sqli-badge-danger  { background: rgba(239,68,68,0.12); color: var(--danger); }
.sqli-badge-warning { background: rgba(245,158,11,0.12); color: var(--warning); }
.sqli-badge-info    { background: rgba(59,130,246,0.12); color: var(--info); }

.sqli-type-header h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.sqli-severity {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--danger);
}

.sqli-severity-warning { color: var(--warning); }
.sqli-severity-info    { color: var(--info); }

.sqli-type-desc {
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 28px;
  font-size: 0.96rem;
}

.sqli-type-desc strong {
  color: var(--text-primary);
}

/* ──────────────── METHOD CARDS ──────────────── */
.sqli-methods-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.sqli-methods-single {
  grid-template-columns: 1fr;
}

.sqli-method-card {
  padding: 28px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.sqli-method-card:hover {
  border-color: var(--border-accent);
  background: rgba(255,255,255,0.04);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.sqli-method-card--wide {
  max-width: 600px;
}

.sqli-method-icon {
  font-size: 1.6rem;
  color: var(--danger);
  margin-bottom: 16px;
}

.sqli-method-card h4 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.sqli-method-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.sqli-code-example {
  background: rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 14px 16px;
  margin-bottom: 16px;
  overflow-x: auto;
}

.sqli-code-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 6px;
}

.sqli-code-example code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.82rem;
  color: #f87171;
  word-break: break-all;
  line-height: 1.6;
}

.sqli-method-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--danger);
  padding: 6px 12px;
  background: rgba(239,68,68,0.08);
  border-radius: 8px;
}

.sqli-tag-warning {
  color: var(--warning);
  background: rgba(245,158,11,0.08);
}

.sqli-tag-info {
  color: var(--info);
  background: rgba(59,130,246,0.08);
}

/* ──────────── TECHNIQUE CARDS ──────────── */
.sqli-techniques-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
}

.sqli-technique-card {
  position: relative;
  padding: 32px 28px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  overflow: hidden;
}

.sqli-technique-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--card-accent);
  opacity: 0;
  transition: var(--transition);
}

.sqli-technique-card:hover {
  border-color: color-mix(in srgb, var(--card-accent) 30%, transparent);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -15px rgba(0,0,0,0.4);
}

.sqli-technique-card:hover::before {
  opacity: 1;
}

.sqli-technique-num {
  position: absolute;
  top: 20px;
  right: 20px;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 2.2rem;
  font-weight: 900;
  color: rgba(255,255,255,0.03);
  line-height: 1;
}

.sqli-technique-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: color-mix(in srgb, var(--card-accent) 12%, transparent);
  color: var(--card-accent);
  font-size: 1.2rem;
  margin-bottom: 18px;
  transition: var(--transition);
}

.sqli-technique-card:hover .sqli-technique-icon {
  transform: scale(1.1) rotate(-5deg);
}

.sqli-technique-card h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.sqli-technique-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.7;
}

/* ──────────── PROTECTION GRID ──────────── */
.sqli-protection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
}

.sqli-protection-card {
  padding: 32px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.sqli-protection-card:hover {
  border-color: rgba(16, 185, 129, 0.25);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -12px rgba(0,0,0,0.4);
}

.sqli-protection-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.sqli-protection-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
  font-size: 1.2rem;
  transition: var(--transition);
}

.sqli-protection-card:hover .sqli-protection-icon {
  transform: scale(1.1);
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.15);
}

.sqli-priority-badge {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 6px;
}

.sqli-priority-badge.sqli-priority-critical {
  background: rgba(239, 68, 68, 0.12);
  color: var(--danger);
}

.sqli-priority-badge.sqli-priority-high {
  background: rgba(245, 158, 11, 0.12);
  color: var(--warning);
}

.sqli-priority-badge.sqli-priority-medium {
  background: rgba(59, 130, 246, 0.12);
  color: var(--info);
}

.sqli-protection-card h4 {
  font-size: 1.06rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.sqli-protection-card p {
  color: var(--text-secondary);
  font-size: 0.86rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.sqli-code-block {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  padding: 16px;
  overflow-x: auto;
}

.sqli-code-block pre {
  margin: 0;
}

.sqli-code-block code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.78rem;
  color: #a5f3fc;
  line-height: 1.65;
  white-space: pre;
}

/* Critical card glow */
.sqli-priority-critical::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--danger), #f97316);
}

/* ──────────── SUMMARY SECTION ──────────── */
.sqli-summary {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  padding: 60px 40px;
  background: var(--gradient-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.sqli-summary::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-xl);
  padding: 1px;
  background: linear-gradient(135deg, rgba(16,185,129,0.3), rgba(139,92,246,0.3), rgba(59,130,246,0.3));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.sqli-summary-icon {
  width: 72px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  border-radius: 20px;
  background: linear-gradient(135deg, rgba(16,185,129,0.15), rgba(139,92,246,0.15));
  font-size: 1.8rem;
  color: var(--success);
  animation: sqli-shield-pulse 3s ease-in-out infinite;
}

@keyframes sqli-shield-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(16,185,129,0.2); }
  50% { box-shadow: 0 0 0 16px rgba(16,185,129,0); }
}

.sqli-summary h2 {
  font-size: 1.8rem;
  font-weight: 900;
  margin-bottom: 16px;
}

.sqli-summary p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  max-width: 640px;
  margin: 0 auto 36px;
}

.sqli-summary p strong {
  color: var(--text-primary);
}

.sqli-summary-layers {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.sqli-layer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 16px 20px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  min-width: 80px;
  transition: var(--transition);
}

.sqli-layer:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
  background: rgba(255,255,255,0.05);
}

.sqli-layer i {
  font-size: 1.3rem;
  color: var(--accent-light);
}

.sqli-layer span {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.sqli-layer--safe {
  background: rgba(16,185,129,0.1);
  border-color: rgba(16,185,129,0.25);
}

.sqli-layer--safe i {
  color: var(--success);
}

.sqli-layer--safe span {
  color: var(--success);
}

.sqli-layer-arrow {
  color: var(--text-muted);
  font-size: 0.8rem;
}

/* ──────────── RESPONSIVE ──────────── */
@media (max-width: 768px) {
  .sqli-hero {
    padding: 100px 5% 60px;
    min-height: auto;
  }

  .sqli-hero-stats {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .sqli-stat {
    width: 100%;
    max-width: 280px;
  }

  .sqli-toc-section {
    margin-top: -20px;
  }

  .sqli-toc {
    padding: 20px;
  }

  .sqli-toc-grid {
    grid-template-columns: 1fr;
  }

  .sqli-type-block {
    padding: 24px;
    margin-bottom: 32px;
  }

  .sqli-type-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .sqli-methods-grid {
    grid-template-columns: 1fr;
  }

  .sqli-techniques-grid {
    grid-template-columns: 1fr;
  }

  .sqli-protection-grid {
    grid-template-columns: 1fr;
  }

  .sqli-summary {
    padding: 40px 24px;
  }

  .sqli-summary-layers {
    gap: 8px;
  }

  .sqli-layer {
    padding: 12px 14px;
    min-width: 60px;
  }

  .sqli-layer i {
    font-size: 1rem;
  }

  .sqli-layer span {
    font-size: 0.68rem;
  }
}

@media (max-width: 480px) {
  .sqli-hero-content h1 {
    font-size: 1.8rem;
  }

  .sqli-type-header h3 {
    font-size: 1.2rem;
  }

  .sqli-summary-layers {
    flex-direction: column;
  }

  .sqli-layer-arrow {
    transform: rotate(90deg);
  }
}