/* ========== Key Takeaways (Visual Cards) ========== */
.key-takeaways {
  background: linear-gradient(135deg, #FFF7ED 0%, #FFFBF0 100%);
  border: 2px solid var(--color-aws-orange-original);
  border-radius: var(--radius-xl); padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}
.key-takeaways h2 {
  color: var(--color-aws-orange); font-size: 1.5em;
  margin: 0 0 var(--spacing-lg) 0; text-align: center;
  border-bottom: none; padding-bottom: 0;
}
.takeaway-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-base);
}
.takeaway-card {
  background: white; border-radius: var(--radius-lg); padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm); border-top: 5px solid;
  display: flex; flex-direction: column; gap: var(--spacing-sm);
}
.takeaway-card:nth-child(1) { border-top-color: #EF4444; }
.takeaway-card:nth-child(2) { border-top-color: #3B82F6; }
.takeaway-card:nth-child(3) { border-top-color: #10B981; }
.takeaway-card:nth-child(4) { border-top-color: #8B5CF6; }
.takeaway-card .tk-icon { font-size: 36px; }
.takeaway-card .tk-title { font-size: 22px; font-weight: var(--font-weight-bold); color: var(--color-text-primary); }
.takeaway-card .tk-desc { font-size: 20px; color: var(--color-text-secondary); line-height: 1.5; }

/* ========== Section ========== */
.section {
  margin-bottom: var(--spacing-2xl); background: white;
  padding: var(--spacing-2xl); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.section h2 {
  font-size: 1.6em; color: var(--color-text-primary);
  border-bottom: 3px solid var(--color-aws-orange);
  padding-bottom: var(--spacing-sm); margin: 0 0 var(--spacing-lg) 0;
}
.section h3 {
  font-size: 1.3em; color: var(--color-text-primary);
  margin: var(--spacing-xl) 0 var(--spacing-md) 0;
}
.section p { font-size: 20px; line-height: 1.7; margin-bottom: var(--spacing-md); }
.section-header { display: flex; align-items: center; gap: var(--spacing-md); margin-bottom: var(--spacing-lg); }
.section-icon { font-size: 28px; flex-shrink: 0; }
.section-header h2 { margin-bottom: 0; }

/* ========== SVG Container ========== */
.svg-container {
  background: var(--color-bg-light); border-radius: var(--radius-lg);
  padding: var(--spacing-base); margin: var(--spacing-lg) 0;
  border: 1px solid var(--color-border-light); overflow-x: auto;
}
.svg-container svg { display: block; margin: 0 auto; max-width: 100%; height: auto; }
.svg-caption {
  text-align: center; font-size: 20px; color: var(--color-text-secondary);
  margin-top: var(--spacing-sm); font-style: italic;
}

/* ========== Visual Comparison Panel ========== */
.vs-panel {
  display: grid; grid-template-columns: 1fr auto 1fr;
  gap: 0; margin: var(--spacing-lg) 0;
  border-radius: var(--radius-lg); overflow: hidden;
  border: 2px solid var(--color-border-light);
}
.vs-side {
  padding: var(--spacing-lg);
}
.vs-side.left { background: linear-gradient(135deg, #ECFDF5, #F0FFF4); }
.vs-side.right { background: linear-gradient(135deg, #EEF2FF, #F0F4FF); }
.vs-divider {
  display: flex; align-items: center; justify-content: center;
  background: var(--color-aws-dark); color: var(--color-aws-orange-original);
  font-weight: var(--font-weight-bold); font-size: 24px;
  writing-mode: vertical-rl; padding: 0 12px;
}
.vs-side h4 {
  font-size: 24px; margin: 0 0 var(--spacing-md) 0;
  display: flex; align-items: center; gap: 10px;
}
.vs-side.left h4 { color: #059669; }
.vs-side.right h4 { color: #4338CA; }
.vs-side ul { padding-left: var(--spacing-lg); margin: 0; }
.vs-side li { font-size: 20px; line-height: 1.6; margin-bottom: 8px; }

/* ========== Info Box ========== */
.info-box {
  padding: var(--spacing-base) var(--spacing-lg); border-radius: var(--radius-base);
  margin: var(--spacing-lg) 0; font-size: 20px; line-height: 1.6;
}
.info-box-title { font-weight: var(--font-weight-bold); margin-bottom: 8px; font-size: 20px; }
.info-box.tip { background: #ECFDF5; border-left: 5px solid var(--color-success); }
.info-box.warning { background: #FEF3C7; border-left: 5px solid var(--color-warning); }
.info-box.danger { background: #FEF2F2; border-left: 5px solid var(--color-error); }
.info-box.note { background: #EFF6FF; border-left: 5px solid var(--color-info); }

/* ========== Visual Direction Cards ========== */
.direction-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-base); margin: var(--spacing-lg) 0;
}
.direction-card {
  border-radius: var(--radius-lg); padding: var(--spacing-lg);
  text-align: center; position: relative; overflow: hidden;
}
.direction-card.outbound {
  background: linear-gradient(135deg, #FEFCE8, #FFF9DB);
  border: 2px solid #FACC15;
}
.direction-card.inbound {
  background: linear-gradient(135deg, #FFF7ED, #FFFBF0);
  border: 2px solid #FDBA74;
}
.direction-card .dir-icon { font-size: 48px; margin-bottom: var(--spacing-sm); }
.direction-card .dir-title { font-size: 24px; font-weight: var(--font-weight-bold); margin-bottom: 6px; }
.direction-card .dir-sub { font-size: 20px; color: var(--color-text-secondary); margin-bottom: var(--spacing-md); }
.direction-card .dir-method {
  display: inline-block; background: white;
  padding: 10px 20px; border-radius: 25px;
  font-size: 22px; font-weight: var(--font-weight-bold);
  box-shadow: var(--shadow-sm);
}
.direction-card.outbound .dir-method { color: #92400E; border: 2px solid #FACC15; }
.direction-card.inbound .dir-method { color: #9A3412; border: 2px solid #FDBA74; }

/* ========== Code Tabs ========== */
.code-tabs {
  margin: var(--spacing-lg) 0; border-radius: var(--radius-base);
  overflow: hidden; border: 1px solid var(--color-border-light);
}
.code-tab-buttons { display: flex; background: var(--color-aws-dark); }
.code-tab-btn {
  background: transparent; border: none; color: rgba(255,255,255,0.7);
  padding: 14px 24px; font-size: 20px; font-weight: var(--font-weight-medium);
  cursor: pointer; transition: all var(--transition-base);
  border-bottom: 3px solid transparent;
}
.code-tab-btn.active {
  color: var(--color-aws-orange-original);
  border-bottom-color: var(--color-aws-orange-original);
  background: rgba(255,153,0,0.1);
}
.code-panel { display: none; background: #1a1a2e; padding: var(--spacing-base); overflow-x: auto; }
.code-panel.active { display: block; }
.code-panel pre {
  margin: 0; font-family: 'Courier New', Consolas, monospace;
  font-size: 20px; line-height: 1.5; color: #e0e0e0; white-space: pre;
}
.code-comment { color: #6a9955; }
.code-keyword { color: #569cd6; }
.code-string { color: #ce9178; }
.code-value { color: #b5cea8; }

/* ========== Best Practice Visual Grid ========== */
.practice-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-base); margin: var(--spacing-lg) 0;
}
.practice-card { padding: var(--spacing-lg); border-radius: var(--radius-lg); }
.practice-card.good { background: #ECFDF5; border: 2px solid var(--color-success); }
.practice-card.bad { background: #FEF2F2; border: 2px solid var(--color-error); }
.practice-card h4 {
  margin: 0 0 var(--spacing-md) 0; font-size: 22px;
  display: flex; align-items: center; gap: 8px;
}
.practice-card.good h4 { color: #059669; }
.practice-card.bad h4 { color: var(--color-error); }
.practice-card ul { padding-left: var(--spacing-lg); margin: 0; }
.practice-card li { margin-bottom: 8px; line-height: 1.5; font-size: 20px; }

/* ========== Exam Tips ========== */
.exam-tips {
  background: linear-gradient(135deg, #EEF2FF, #F0F4FF);
  border: 2px solid #818CF8; border-radius: var(--radius-xl);
  padding: var(--spacing-2xl); margin: var(--spacing-2xl) 0;
}
.exam-tips h2 { color: #6366F1; border-bottom-color: #818CF8; }
.exam-pattern-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-base); margin: var(--spacing-lg) 0;
}
.exam-card {
  background: white; border-radius: var(--radius-lg); padding: var(--spacing-lg);
  border-left: 5px solid;
}
.exam-card.question { border-left-color: #818CF8; }
.exam-card.trap { border-left-color: var(--color-error); }
.exam-card .ec-label {
  font-size: 20px; font-weight: var(--font-weight-bold); margin-bottom: 8px;
}
.exam-card.question .ec-label { color: #6366F1; }
.exam-card.trap .ec-label { color: var(--color-error); }
.exam-card p { font-size: 20px; margin: 0; line-height: 1.6; }
.exam-card strong { color: var(--color-aws-dark); }

/* ========== FAQ Accordion ========== */
.faq-item {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-base); margin-bottom: var(--spacing-sm); overflow: hidden;
}
.faq-question {
  width: 100%; background: var(--color-bg-light); border: none;
  padding: var(--spacing-base) var(--spacing-lg); font-size: 20px;
  font-weight: var(--font-weight-semibold); color: var(--color-text-primary);
  cursor: pointer; display: flex; justify-content: space-between;
  align-items: center; text-align: left; transition: background var(--transition-base);
}
.faq-question:hover { background: #FFF7ED; }
.faq-icon { font-size: 20px; transition: transform var(--transition-base); flex-shrink: 0; margin-left: var(--spacing-sm); }
.faq-item.open .faq-icon { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.faq-answer-inner { padding: var(--spacing-base) var(--spacing-lg); font-size: 20px; line-height: 1.7; }

/* ========== Cheat Sheet ========== */
.cheatsheet {
  background: linear-gradient(135deg, #232F3E, #37475A);
  color: white; border-radius: var(--radius-xl);
  padding: var(--spacing-2xl); margin: var(--spacing-2xl) 0;
}
.cheatsheet h2 { color: var(--color-aws-orange-original); border-bottom-color: rgba(255,153,0,0.4); text-align: center; }
.cheatsheet-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-base); margin-top: var(--spacing-lg);
}
.cheatsheet-item {
  background: rgba(255,255,255,0.08); border-radius: var(--radius-base);
  padding: var(--spacing-base); border: 1px solid rgba(255,255,255,0.15);
}
.cheatsheet-item h4 { color: var(--color-aws-orange-original); margin: 0 0 8px 0; font-size: 22px; }
.cheatsheet-item p { color: rgba(255,255,255,0.85); margin: 0; font-size: 20px; line-height: 1.5; }

/* ========== Glossary ========== */
.glossary-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-base); margin: var(--spacing-lg) 0;
}
.glossary-item {
  background: var(--color-bg-light); padding: var(--spacing-base);
  border-radius: var(--radius-base); border-left: 4px solid var(--color-info);
}
.glossary-term { font-weight: var(--font-weight-bold); color: var(--color-info); font-size: 20px; margin-bottom: 4px; }
.glossary-def { font-size: 20px; color: var(--color-text-secondary); line-height: 1.5; }

/* ========== Troubleshooting Visual ========== */
.trouble-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-base); margin: var(--spacing-lg) 0;
}
.trouble-card {
  background: white; border-radius: var(--radius-lg); padding: var(--spacing-lg);
  border: 2px solid var(--color-border-light);
  transition: all var(--transition-base);
}
.trouble-card:hover { border-color: var(--color-aws-orange); box-shadow: var(--shadow-md); }
.trouble-card .tc-icon { font-size: 36px; margin-bottom: var(--spacing-sm); }
.trouble-card .tc-title { font-size: 22px; font-weight: var(--font-weight-bold); margin-bottom: 8px; color: var(--color-text-primary); }
.trouble-card .tc-desc { font-size: 20px; color: var(--color-text-secondary); line-height: 1.5; }
.trouble-card .tc-fix {
  margin-top: var(--spacing-sm); padding: var(--spacing-sm) var(--spacing-md);
  background: #ECFDF5; border-radius: var(--radius-sm);
  font-size: 20px; color: #059669; font-weight: var(--font-weight-semibold);
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .takeaway-grid, .direction-grid, .practice-grid,
  .exam-pattern-grid, .cheatsheet-grid, .glossary-grid,
  .trouble-grid { grid-template-columns: 1fr; }
  .vs-panel { grid-template-columns: 1fr; }
  .vs-divider { writing-mode: horizontal-tb; padding: 8px 0; }
}