/* ========================================
   CSS変数定義
   ======================================== */
:root {
  --color-aws-dark: #232F3E;
  --color-aws-orange: #dc7600;
  --color-aws-orange-original: #FF9900;
  --color-aws-orange-hover: #EC7211;
  --color-text-primary: #374151;
  --color-text-secondary: #6B7280;
  --color-text-tertiary: #6f7682;
  --color-text-white: #FFFFFF;
  --color-bg-light: #F9FAFB;
  --color-bg-white: #FFFFFF;
  --color-bg-gradient-start: #232F3E;
  --color-bg-gradient-end: #374151;
  --color-border: #909296;
  --color-border-light: #E5E7EB;
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;
  --spacing-xs: 5px;
  --spacing-sm: 10px;
  --spacing-md: 15px;
  --spacing-base: 20px;
  --spacing-lg: 25px;
  --spacing-xl: 30px;
  --spacing-2xl: 40px;
  --spacing-3xl: 60px;
  --spacing-4xl: 80px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-base: 10px;
  --radius-lg: 15px;
  --radius-xl: 20px;
  --radius-full: 50%;
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 40px rgba(0,0,0,0.2);
  --shadow-orange: 0 4px 12px rgba(255,153,0,0.4);
  --shadow-orange-hover: 0 6px 20px rgba(255,153,0,0.6);
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --header-height: 60px;
  --container-max-width: 1200px;
  --z-header: 1002;
  --z-progress-bar: 1001;
  --z-scroll-top: 1000;
}

/* ========================================
   リセット＆ベース
   ======================================== */
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Helvetica Neue',Arial,sans-serif;
  line-height:var(--line-height-normal);
  color:var(--color-text-primary);
  margin:0;padding:var(--spacing-base);padding-top:var(--spacing-4xl);
  background-color:var(--color-bg-light);font-size:20px;
}

/* ========================================
   固定ヘッダー
   ======================================== */
.fixed-nav-header{position:fixed;top:0;left:0;right:0;height:var(--header-height);
  background:linear-gradient(135deg,var(--color-bg-gradient-start) 0%,var(--color-bg-gradient-end) 100%);
  box-shadow:0 2px 10px rgba(0,0,0,0.3);z-index:var(--z-header);display:flex;align-items:center;}
.fixed-nav-container{width:100%;max-width:var(--container-max-width);margin:0 auto;
  padding:0 var(--spacing-xl);display:flex;align-items:center;justify-content:space-between;}
.fixed-nav-logo{font-size:1.3em;font-weight:var(--font-weight-bold);color:var(--color-aws-orange-original);
  text-decoration:none;display:flex;align-items:center;gap:8px;}
.fixed-nav-links{display:flex;gap:18px;align-items:center;}
.fixed-nav-links a{color:var(--color-text-white);text-decoration:none;font-weight:var(--font-weight-medium);
  font-size:0.8em;padding:6px 14px;border-radius:var(--radius-sm);transition:all var(--transition-base);white-space:nowrap;}
.fixed-nav-links a:hover,.fixed-nav-links a:focus{background-color:rgba(255,153,0,0.2);color:var(--color-aws-orange-original);}

/* ========================================
   読書進捗
   ======================================== */
.reading-progress{position:fixed;top:var(--header-height);left:0;width:100%;height:4px;
  background-color:var(--color-border-light);z-index:var(--z-progress-bar);opacity:0;transition:opacity var(--transition-base);}
.reading-progress.show{opacity:1;}
.reading-progress-bar{height:100%;background:linear-gradient(90deg,var(--color-aws-orange-original) 0%,var(--color-aws-orange-hover) 100%);
  width:0%;transition:width 0.1s ease;}

/* ========================================
   スクロールトップ
   ======================================== */
.scroll-to-top{position:fixed;bottom:var(--spacing-xl);right:var(--spacing-xl);width:50px;height:50px;
  background:linear-gradient(135deg,var(--color-aws-orange-original) 0%,var(--color-aws-orange-hover) 100%);
  color:var(--color-text-white);border:none;border-radius:var(--radius-full);font-size:1.5em;cursor:pointer;
  box-shadow:var(--shadow-orange);opacity:0;visibility:hidden;transition:all var(--transition-base);
  z-index:var(--z-scroll-top);display:flex;align-items:center;justify-content:center;}
.scroll-to-top.show{opacity:1;visibility:visible;}
.scroll-to-top:hover{transform:translateY(-5px);box-shadow:var(--shadow-orange-hover);}

/* ========================================
   コンテナ＆ブレッドクラム
   ======================================== */
.container{max-width:var(--container-max-width);margin:0 auto;padding:var(--spacing-base);
  background-color:var(--color-bg-white);border-radius:16px;box-shadow:var(--shadow-lg);}
.breadcrumb-nav{background-color:rgba(255,255,255,0.95);padding:15px 25px;border-radius:var(--radius-base);
  margin-bottom:var(--spacing-xl);display:flex;flex-wrap:wrap;align-items:center;gap:var(--spacing-sm);
  box-shadow:var(--shadow-sm);font-size:0.85em;}
.breadcrumb-home{color:var(--color-aws-orange);text-decoration:none;font-weight:var(--font-weight-semibold);}
.breadcrumb-separator{color:var(--color-text-tertiary);user-select:none;}
.breadcrumb-current{color:var(--color-aws-orange);font-weight:var(--font-weight-bold);}

/* ========================================
   セクション＆見出し
   ======================================== */
.section{margin-bottom:var(--spacing-2xl);background-color:var(--color-bg-light);
  padding:var(--spacing-lg);border-radius:var(--radius-base);box-shadow:var(--shadow-sm);}
h1,h2,h3,h4{color:var(--color-text-primary);line-height:var(--line-height-tight);margin-top:0;}
h2{font-size:1.8em;margin-bottom:var(--spacing-md);border-bottom:3px solid var(--color-aws-orange);padding-bottom:var(--spacing-sm);}
h3{font-size:1.35em;margin-bottom:var(--spacing-md);padding-top:var(--spacing-sm);}
h4{font-size:1.1em;margin-bottom:var(--spacing-sm);}
.highlight{color:var(--color-aws-orange);font-weight:var(--font-weight-bold);}
p{margin-bottom:var(--spacing-sm);}

/* ========================================
   ヒーローセクション
   ======================================== */
.hero{background:linear-gradient(135deg,var(--color-bg-gradient-start) 0%,var(--color-bg-gradient-end) 100%);
  color:var(--color-text-white);padding:var(--spacing-3xl) var(--spacing-2xl);border-radius:var(--radius-xl);
  margin-bottom:var(--spacing-2xl);text-align:center;}
.hero h1{color:var(--color-text-white);font-size:2.2em;margin-bottom:var(--spacing-md);}
.hero-subtitle{font-size:1.05em;color:rgba(255,255,255,0.85);margin-bottom:var(--spacing-xl);}
.hero-meta{display:flex;justify-content:center;gap:var(--spacing-lg);flex-wrap:wrap;margin-top:var(--spacing-base);}
.hero-badge{display:inline-block;background:var(--color-aws-orange-original);color:var(--color-text-white);
  padding:8px 24px;border-radius:var(--radius-xl);font-weight:var(--font-weight-bold);font-size:0.85em;}
.hero-badge.outline{background:transparent;border:2px solid rgba(255,255,255,0.5);color:rgba(255,255,255,0.9);}

/* ========================================
   目次
   ======================================== */
.toc{background:var(--color-bg-white);border-radius:var(--radius-lg);padding:var(--spacing-lg);
  margin-bottom:var(--spacing-2xl);box-shadow:var(--shadow-sm);border:1px solid var(--color-border-light);}
.toc h2{border-bottom-color:var(--color-info);font-size:1.4em;}
.toc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-sm);}
.toc-item{display:flex;align-items:center;gap:var(--spacing-sm);padding:10px 14px;
  border-radius:var(--radius-sm);transition:background var(--transition-fast);text-decoration:none;color:var(--color-text-primary);}
.toc-item:hover{background:rgba(255,153,0,0.06);}
.toc-num{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;
  background:var(--color-info);color:white;border-radius:var(--radius-full);font-weight:var(--font-weight-bold);
  font-size:0.8em;flex-shrink:0;}
.toc-label{font-size:0.95em;font-weight:var(--font-weight-medium);}

/* ========================================
   結論カード
   ======================================== */
.conclusion-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--spacing-base);margin-bottom:var(--spacing-2xl);}
.conclusion-card{background-color:var(--color-bg-white);border-radius:var(--radius-lg);padding:var(--spacing-lg);
  box-shadow:var(--shadow-sm);border-left:5px solid var(--color-aws-orange);
  transition:transform var(--transition-base),box-shadow var(--transition-base);}
.conclusion-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);}
.conclusion-card-icon{font-size:2em;margin-bottom:var(--spacing-sm);}
.conclusion-card h3{font-size:1.05em;color:var(--color-aws-orange);margin-bottom:var(--spacing-xs);}
.conclusion-card p{font-size:0.92em;color:var(--color-text-secondary);margin-bottom:0;}

/* ========================================
   テーブル
   ======================================== */
.analogy-table{width:100%;border-collapse:collapse;margin-bottom:var(--spacing-base);font-size:0.95em;}
.analogy-table thead{background:linear-gradient(135deg,var(--color-bg-gradient-start) 0%,var(--color-bg-gradient-end) 100%);color:var(--color-text-white);}
.analogy-table th{padding:14px 18px;text-align:left;font-weight:var(--font-weight-bold);}
.analogy-table td{padding:14px 18px;border-bottom:1px solid var(--color-border-light);}
.analogy-table tbody tr:nth-child(even){background-color:rgba(255,153,0,0.04);}
.analogy-table tbody tr:hover{background-color:rgba(255,153,0,0.08);}

/* ========================================
   SVGコンテナ
   ======================================== */
.svg-container{width:100%;overflow-x:auto;margin:var(--spacing-base) 0;border-radius:var(--radius-base);background-color:var(--color-bg-white);}
.svg-container svg{display:block;max-width:100%;height:auto;}

/* ========================================
   コンポーネントグリッド
   ======================================== */
.component-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-base);margin-bottom:var(--spacing-base);}
.component-card{background-color:var(--color-bg-white);border-radius:var(--radius-lg);padding:var(--spacing-lg);
  box-shadow:var(--shadow-sm);border-top:4px solid var(--color-info);
  transition:transform var(--transition-base),box-shadow var(--transition-base);}
.component-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);}
.component-card.orange-border{border-top-color:var(--color-aws-orange);}
.component-card.green-border{border-top-color:var(--color-success);}
.component-card.red-border{border-top-color:var(--color-error);}
.component-card.purple-border{border-top-color:#8B5CF6;}
.component-card-icon{font-size:1.8em;margin-bottom:var(--spacing-sm);}
.component-card h4{margin-bottom:var(--spacing-sm);}
.component-card h4{color:var(--color-info);}
.component-card.orange-border h4{color:var(--color-aws-orange);}
.component-card.green-border h4{color:var(--color-success);}
.component-card.red-border h4{color:var(--color-error);}
.component-card.purple-border h4{color:#8B5CF6;}
.component-card p{font-size:0.92em;color:var(--color-text-secondary);margin-bottom:0;}

/* ========================================
   コードタブ
   ======================================== */
.code-tabs{margin:var(--spacing-base) 0;}
.tab-buttons{display:flex;gap:0;border-bottom:2px solid var(--color-border-light);margin-bottom:0;flex-wrap:wrap;}
.tab-btn{padding:10px 20px;background:var(--color-bg-light);border:1px solid var(--color-border-light);
  border-bottom:none;border-radius:var(--radius-sm) var(--radius-sm) 0 0;cursor:pointer;
  font-size:0.85em;font-weight:var(--font-weight-semibold);color:var(--color-text-secondary);transition:all var(--transition-fast);}
.tab-btn.active{background:var(--color-bg-white);color:var(--color-aws-orange);border-color:var(--color-aws-orange);
  border-bottom:2px solid var(--color-bg-white);margin-bottom:-2px;}
.tab-content{display:none;background:#1E293B;border-radius:0 0 var(--radius-base) var(--radius-base);overflow-x:auto;}
.tab-content.active{display:block;}
.tab-content pre{margin:0;padding:var(--spacing-base);font-size:0.78em;line-height:1.6;}
.tab-content code{color:#E2E8F0;font-family:'SF Mono','Fira Code','Consolas',monospace;}
.json-key{color:#7DD3FC;} .json-string{color:#86EFAC;} .json-value{color:#FDE68A;}
.json-bool{color:#C4B5FD;} .json-comment{color:#64748B;} .cli-cmd{color:#FDE68A;} .cli-flag{color:#7DD3FC;} .cli-val{color:#86EFAC;}

/* ========================================
   ベストプラクティス
   ======================================== */
.practice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-base);margin-bottom:var(--spacing-base);}
.practice-card{background-color:var(--color-bg-white);border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-sm);}
.practice-card.good{border-left:5px solid var(--color-success);}
.practice-card.bad{border-left:5px solid var(--color-error);}
.practice-card h4{margin-bottom:var(--spacing-sm);}
.practice-card.good h4{color:var(--color-success);}
.practice-card.bad h4{color:var(--color-error);}
.practice-card p{font-size:0.92em;color:var(--color-text-secondary);margin-bottom:0;}

/* ========================================
   FAQ
   ======================================== */
.faq-item{background-color:var(--color-bg-white);border-radius:var(--radius-base);margin-bottom:var(--spacing-sm);box-shadow:var(--shadow-xs);overflow:hidden;}
.faq-question{width:100%;padding:18px 24px;background:none;border:none;cursor:pointer;
  font-size:0.95em;font-weight:var(--font-weight-semibold);color:var(--color-text-primary);
  text-align:left;display:flex;justify-content:space-between;align-items:center;transition:background-color var(--transition-fast);}
.faq-question:hover{background-color:rgba(255,153,0,0.05);}
.faq-question::after{content:"+";font-size:1.4em;font-weight:var(--font-weight-bold);color:var(--color-aws-orange);
  transition:transform var(--transition-base);flex-shrink:0;margin-left:var(--spacing-sm);}
.faq-item.open .faq-question::after{transform:rotate(45deg);}
.faq-answer{max-height:0;overflow:hidden;transition:max-height 0.4s ease,padding 0.3s ease;}
.faq-item.open .faq-answer{max-height:600px;padding:0 24px 18px;}
.faq-answer p{font-size:0.92em;color:var(--color-text-secondary);line-height:var(--line-height-relaxed);}

/* ========================================
   チートシート
   ======================================== */
.cheatsheet{background:linear-gradient(135deg,#1a1a2e 0%,#16213e 100%);border-radius:var(--radius-xl);padding:var(--spacing-2xl);color:var(--color-text-white);}
.cheatsheet h2{color:var(--color-aws-orange-original);border-bottom-color:rgba(255,153,0,0.4);}
.cheatsheet-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:var(--spacing-base);}
.cheatsheet-item{background:rgba(255,255,255,0.08);border-radius:var(--radius-base);padding:var(--spacing-base);border:1px solid rgba(255,255,255,0.1);}
.cheatsheet-item h4{color:var(--color-aws-orange-original);margin-bottom:var(--spacing-xs);font-size:1em;}
.cheatsheet-item p{color:rgba(255,255,255,0.8);font-size:0.88em;margin-bottom:0;}

/* ========================================
   注意ボックス
   ======================================== */
.note-box{border-left:4px solid var(--color-info);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:var(--spacing-md) var(--spacing-base);margin:var(--spacing-base) 0;font-size:0.95em;background-color:#EFF6FF;}
.note-box.warning{background-color:#FFFBEB;border-left-color:var(--color-warning);}
.note-box.danger{background-color:#FEF2F2;border-left-color:var(--color-error);}
.note-box.success{background-color:#ECFDF5;border-left-color:var(--color-success);}
.note-box-title{font-weight:var(--font-weight-bold);margin-bottom:var(--spacing-xs);}
.note-box .note-box-title{color:var(--color-info);}
.note-box.warning .note-box-title{color:#B45309;}
.note-box.danger .note-box-title{color:var(--color-error);}
.note-box.success .note-box-title{color:var(--color-success);}

/* ========================================
   フローステップ（矢印付き）
   ======================================== */
.flow-steps{display:flex;gap:0;margin:var(--spacing-base) 0;flex-wrap:wrap;justify-content:center;}
.flow-step{background:var(--color-bg-white);border-radius:var(--radius-lg);padding:var(--spacing-base) var(--spacing-md);
  text-align:center;box-shadow:var(--shadow-sm);flex:1;min-width:180px;max-width:240px;position:relative;}
.flow-step-number{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  background:linear-gradient(135deg,var(--color-aws-orange-original),var(--color-aws-orange-hover));
  color:var(--color-text-white);border-radius:var(--radius-full);font-weight:var(--font-weight-bold);font-size:1em;margin-bottom:var(--spacing-xs);}
.flow-step h4{color:var(--color-text-primary);margin-bottom:var(--spacing-xs);font-size:0.95em;}
.flow-step p{font-size:0.82em;color:var(--color-text-secondary);margin-bottom:0;}
.flow-arrow{display:flex;align-items:center;justify-content:center;font-size:1.5em;color:var(--color-aws-orange);
  flex-shrink:0;width:40px;font-weight:bold;}

/* ========================================
   トラブルシュート
   ======================================== */
.trouble-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:var(--spacing-base);margin:var(--spacing-base) 0;}
.trouble-card{background:var(--color-bg-white);border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-sm);
  border-left:4px solid var(--color-warning);}
.trouble-card h4{color:var(--color-warning);margin-bottom:var(--spacing-xs);font-size:1em;}
.trouble-card .symptom{font-size:0.9em;color:var(--color-text-primary);margin-bottom:var(--spacing-sm);font-weight:var(--font-weight-semibold);}
.trouble-card .solution{font-size:0.88em;color:var(--color-text-secondary);padding:var(--spacing-sm);
  background:var(--color-bg-light);border-radius:var(--radius-sm);margin-bottom:0;}

/* ========================================
   試験対策
   ======================================== */
.exam-tips{background:linear-gradient(135deg,#0c4a6e 0%,#1e3a5f 100%);border-radius:var(--radius-xl);
  padding:var(--spacing-2xl);color:var(--color-text-white);margin-bottom:var(--spacing-2xl);}
.exam-tips h2{color:#7DD3FC;border-bottom-color:rgba(125,211,252,0.3);}
.exam-tips h3{color:#FDE68A;margin-top:var(--spacing-base);}
.exam-tip-item{background:rgba(255,255,255,0.08);border-radius:var(--radius-base);padding:var(--spacing-base);
  margin-bottom:var(--spacing-sm);border-left:4px solid #FDE68A;}
.exam-tip-item p{color:rgba(255,255,255,0.9);font-size:0.92em;margin-bottom:0;}
.exam-tip-item strong{color:#FDE68A;}

/* ========================================
   用語集
   ======================================== */
.glossary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-sm);margin:var(--spacing-base) 0;}
.glossary-item{background:var(--color-bg-white);border-radius:var(--radius-base);padding:var(--spacing-md) var(--spacing-base);
  box-shadow:var(--shadow-xs);border-left:3px solid var(--color-info);}
.glossary-item dt{font-weight:var(--font-weight-bold);color:var(--color-info);font-size:0.95em;margin-bottom:4px;}
.glossary-item dd{font-size:0.88em;color:var(--color-text-secondary);margin:0;}

/* ========================================
   フッター＆アクセシビリティ
   ======================================== */
.page-footer{text-align:center;padding:var(--spacing-2xl) var(--spacing-base);color:var(--color-text-tertiary);font-size:0.85em;}
.page-footer a{color:var(--color-info);text-decoration:none;}
.page-footer a:hover{text-decoration:underline;}
a:focus,button:focus{outline:3px solid var(--color-aws-orange-original);outline-offset:2px;}
.skip-link{position:absolute;top:-40px;left:0;background:var(--color-aws-orange);color:var(--color-text-white);
  padding:8px 16px;text-decoration:none;border-radius:0 0 4px 0;font-weight:var(--font-weight-bold);z-index:9999;}
.skip-link:focus{top:0;}

/* ========================================
   レスポンシブ
   ======================================== */
@media(max-width:768px){
  body{font-size:18px;padding:var(--spacing-sm);padding-top:70px;}
  .hero{padding:var(--spacing-2xl) var(--spacing-base);}
  .hero h1{font-size:1.5em;}
  .fixed-nav-links{display:none;}
  .conclusion-grid,.component-grid,.practice-grid,.cheatsheet-grid,.trouble-grid,.toc-grid,.glossary-grid{grid-template-columns:1fr;}
  .flow-steps{flex-direction:column;align-items:center;}
  .flow-arrow{transform:rotate(90deg);width:auto;height:30px;}
  .flow-step{max-width:100%;}
}