/* ========================================
   AWS 배포 실습 과정 - 공통 스타일
   (aws-security-course 기반 + 배포 테마 색상)
   ======================================== */

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

:root {
  --deploy-orange: #FF9900;
  --deploy-dark: #232F3E;
  --deploy-light: #F5F7FA;
  --deploy-blue: #1B6299;
  --primary: #FF9900;
  --bg: #ffffff;
  --bg-alt: #f5f7fa;
  --bg-code: #1e1e2e;
  --text: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --border: #e0e0e0;
  --success: #2E7D32;
  --warning: #F57F17;
  --danger: #B71C1C;
  --info: #1565C0;
  --radius: 8px;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
  --content-width: 960px;
  --sidebar-width: 260px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
}

a { color: var(--deploy-blue); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; height: auto; border-radius: var(--radius); }

/* ========================================
   Header
   ======================================== */
.site-header {
  background: var(--deploy-dark);
  color: #fff;
  padding: 0 2rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-lg);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
}

.header-logo:hover { text-decoration: none; }

.header-logo .aws-icon {
  background: var(--deploy-orange);
  color: #fff;
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 800;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 4px;
}

.header-nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.header-nav a {
  color: #ccc;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.header-nav a:hover { color: #fff; text-decoration: none; }

/* ========================================
   Layout
   ======================================== */
.page-layout {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  gap: 2rem;
  padding: 2rem;
}

.sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: 80px;
  align-self: flex-start;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}

.sidebar-nav { list-style: none; }

.sidebar-nav li { margin-bottom: 2px; }

.sidebar-nav a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--text-light);
  font-size: 0.9rem;
  transition: all 0.2s;
}

.sidebar-nav a:hover {
  background: var(--bg-alt);
  color: var(--text);
  text-decoration: none;
}

.sidebar-nav a.active {
  background: #FFF3E0;
  color: var(--deploy-dark);
  font-weight: 600;
}

.sidebar-section {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 1rem 12px 0.5rem;
}

.main-content {
  flex: 1;
  min-width: 0;
  max-width: var(--content-width);
}

/* ========================================
   Index Page - Card Grid
   ======================================== */
.chapter-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.chapter-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
}

.chapter-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--deploy-orange);
  transform: translateY(-2px);
}

.chapter-card .chapter-num {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--deploy-orange);
  margin-bottom: 0.5rem;
}

.chapter-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.chapter-card p {
  font-size: 0.85rem;
  color: var(--text-light);
  flex: 1;
}

.chapter-card .tags {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.tag {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 12px;
  background: var(--bg-alt);
  color: var(--text-light);
}

.tag.lab {
  background: #E8F5E9;
  color: var(--success);
}

.tag.aws {
  background: #FFF3E0;
  color: #E65100;
}

.tag.security {
  background: #FCE4EC;
  color: var(--danger);
}

.section-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--deploy-dark);
  padding-bottom: 0.5rem;
  border-bottom: 3px solid var(--deploy-orange);
  margin-top: 2.5rem;
  margin-bottom: 0.5rem;
}

.section-title:first-of-type { margin-top: 0; }

/* ========================================
   Chapter Content
   ======================================== */
.chapter-header {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.chapter-header .chapter-num {
  font-size: 0.9rem;
  color: var(--deploy-orange);
  font-weight: 700;
}

.chapter-header h1 {
  font-size: 2rem;
  color: var(--deploy-dark);
  margin: 0.25rem 0 1rem;
  line-height: 1.3;
}

.chapter-header .objectives {
  background: #FFF3E0;
  border-left: 4px solid var(--deploy-orange);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.chapter-header .objectives h3 {
  font-size: 0.9rem;
  color: var(--deploy-dark);
  margin-bottom: 0.5rem;
}

.chapter-header .objectives ul {
  margin: 0;
  padding-left: 1.25rem;
  font-size: 0.95rem;
}

.chapter-header .objectives li { margin-bottom: 0.25rem; }

/* Content Sections */
.content-section { margin-bottom: 3rem; }

.content-section h2 {
  font-size: 1.5rem;
  color: var(--deploy-dark);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--bg-alt);
}

.content-section h3 {
  font-size: 1.2rem;
  color: var(--text);
  margin: 1.5rem 0 0.75rem;
}

.content-section h4 {
  font-size: 1rem;
  color: var(--text);
  margin: 1rem 0 0.5rem;
}

.content-section p { margin-bottom: 1rem; }

.content-section ul, .content-section ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
}

.content-section li { margin-bottom: 0.4rem; }

/* ========================================
   Info Boxes
   ======================================== */
.info-box {
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin: 1.5rem 0;
  font-size: 0.95rem;
}

.info-box-title {
  font-weight: 700;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.info-box.concept {
  background: #e3f2fd;
  border-left: 4px solid var(--info);
}
.info-box.concept .info-box-title { color: var(--info); }

.info-box.tip {
  background: #E8F5E9;
  border-left: 4px solid var(--success);
}
.info-box.tip .info-box-title { color: var(--success); }

.info-box.warning {
  background: #FFF3E0;
  border-left: 4px solid var(--warning);
}
.info-box.warning .info-box-title { color: #E65100; }

.info-box.danger {
  background: #FCE4EC;
  border-left: 4px solid var(--danger);
}
.info-box.danger .info-box-title { color: var(--danger); }

.info-box.analogy {
  background: #F3E5F5;
  border-left: 4px solid #7B1FA2;
}
.info-box.analogy .info-box-title { color: #7B1FA2; }

.info-box.best-practice {
  background: #E0F2F1;
  border-left: 4px solid #00695C;
}
.info-box.best-practice .info-box-title { color: #00695C; }

/* ========================================
   Lab / Hands-on Section
   ======================================== */
.lab-section {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 2rem 0;
}

.lab-section .lab-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--success);
  margin-bottom: 1rem;
}

.lab-section .lab-title::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Step-by-step */
.steps { counter-reset: step; list-style: none; padding: 0; }

.step {
  counter-increment: step;
  position: relative;
  padding: 1rem 1rem 1rem 3.5rem;
  margin-bottom: 1rem;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.step::before {
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 1rem;
  width: 28px;
  height: 28px;
  background: var(--deploy-orange);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
}

.step-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.step p { margin-bottom: 0.5rem; font-size: 0.95rem; }

.step img {
  margin: 0.75rem 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* Screenshot placeholder */
.screenshot-placeholder {
  background: var(--bg-alt);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  margin: 1rem 0;
}

/* ========================================
   Code Blocks
   ======================================== */
pre {
  background: var(--bg-code);
  color: #cdd6f4;
  border-radius: var(--radius);
  padding: 1.25rem;
  overflow-x: auto;
  margin: 1rem 0;
  position: relative;
  font-size: 0.9rem;
  line-height: 1.6;
}

pre code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.85rem;
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  background: #f0f0f0;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  color: #E65100;
}

pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #181825;
  padding: 0.5rem 1rem;
  border-radius: var(--radius) var(--radius) 0 0;
  margin-bottom: -0.5rem;
}

.code-header .lang {
  font-size: 0.75rem;
  color: #888;
  text-transform: uppercase;
}

.copy-btn {
  background: none;
  border: 1px solid #555;
  color: #aaa;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s;
}

.copy-btn:hover { background: #333; color: #fff; }
.copy-btn.copied { background: var(--success); border-color: var(--success); color: #fff; }

/* Syntax Highlighting (Basic) */
.kw { color: #cba6f7; }
.str { color: #a6e3a1; }
.num { color: #fab387; }
.cm { color: #6c7086; }
.fn { color: #89b4fa; }
.op { color: #89dceb; }
.var { color: #f38ba8; }

/* ========================================
   Tables
   ======================================== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
  font-size: 0.95rem;
}

thead { background: var(--deploy-dark); color: #fff; }
th { padding: 0.75rem 1rem; text-align: left; font-weight: 600; }
td { padding: 0.75rem 1rem; border-bottom: 1px solid var(--border); }
tr:hover td { background: var(--bg-alt); }

/* ========================================
   Architecture Diagram (HTML/CSS)
   ======================================== */
.diagram {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
}

.diagram-title {
  text-align: center;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--deploy-dark);
  margin-bottom: 1rem;
}

.diagram-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 0.5rem 0;
  flex-wrap: wrap;
}

.diagram-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.diagram-box {
  border: 2px solid var(--text-muted);
  border-radius: 8px;
  padding: 0.6rem 1rem;
  text-align: center;
  font-size: 0.82rem;
  line-height: 1.4;
  min-width: 100px;
  background: #fff;
}

.diagram-box .box-title {
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 0.2rem;
}

.diagram-box .box-sub {
  font-size: 0.75rem;
  color: var(--text-light);
}

/* Service colors */
.diagram-box.user      { border-color: #666; background: #f5f5f5; }
.diagram-box.network   { border-color: #7B1FA2; background: #F3E5F5; }
.diagram-box.compute   { border-color: #FF9900; background: #FFF3E0; }
.diagram-box.storage   { border-color: #2E7D32; background: #E8F5E9; }
.diagram-box.database  { border-color: #1565C0; background: #E3F2FD; }
.diagram-box.serverless { border-color: #AD1457; background: #FCE4EC; }
.diagram-box.cdn       { border-color: #7B1FA2; background: #EDE7F6; }
.diagram-box.cache     { border-color: #C62828; background: #FFEBEE; }
.diagram-box.queue     { border-color: #AD1457; background: #FCE4EC; }
.diagram-box.monitor   { border-color: #E65100; background: #FFF3E0; }
.diagram-box.region    { border-color: #FF9900; background: #FFF8E1; }
.diagram-box.security  { border-color: #C62828; background: #FFEBEE; }
.diagram-box.iam       { border-color: #C62828; background: #FCE4EC; }
.diagram-box.nat       { border-color: #7B1FA2; background: #EDE7F6; }

/* Grouping */
.diagram-group {
  border: 2px dashed var(--text-muted);
  border-radius: 12px;
  padding: 1rem;
  margin: 0.5rem 0;
  position: relative;
}

.diagram-group.vpc     { border-color: #7B1FA2; }
.diagram-group.subnet-pub  { border-color: #2E7D32; background: rgba(232,245,233,0.3); }
.diagram-group.subnet-priv { border-color: #1565C0; background: rgba(227,242,253,0.3); }
.diagram-group.region  { border-color: #FF9900; background: rgba(255,248,225,0.3); }
.diagram-group.cloud   { border-color: #232F3E; background: rgba(245,247,250,0.3); }

.diagram-group-label {
  position: absolute;
  top: -10px;
  left: 16px;
  background: var(--bg-alt);
  padding: 0 8px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-light);
  white-space: nowrap;
}

/* Arrows */
.diagram-arrow {
  font-size: 1.3rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.diagram-arrow.down {
  margin: 0.25rem 0;
  font-size: 1.3rem;
}

/* ========================================
   Hint / Accordion
   ======================================== */
.hint-toggle {
  background: #FFF3E0;
  border: 1px solid #FFE0B2;
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: #E65100;
  font-weight: 600;
  margin: 0.5rem 0;
  width: 100%;
  text-align: left;
  transition: background 0.2s;
}

.hint-toggle:hover { background: #FFE0B2; }

.hint-content {
  display: none;
  padding: 1rem;
  background: #FFF8E1;
  border: 1px solid #FFE0B2;
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  margin-top: -0.5rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.hint-content.open { display: block; }

/* ========================================
   Checklist
   ======================================== */
.checklist {
  list-style: none;
  padding: 0;
}

.checklist li {
  padding: 0.5rem 0 0.5rem 2rem;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.checklist li::before {
  content: '\2610';
  position: absolute;
  left: 0.5rem;
  font-size: 1.2rem;
  color: var(--deploy-orange);
}

/* ========================================
   Answer Sections (강사용)
   ======================================== */
.answer-section {
  background: #F1F8E9;
  border: 1px solid #C5E1A5;
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.answer-section h3 {
  color: var(--success);
  margin-bottom: 1rem;
}

.method-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--border);
}

.method-tab {
  padding: 0.5rem 1.25rem;
  border: none;
  background: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-light);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}

.method-tab:hover { color: var(--text); }

.method-tab.active {
  color: var(--deploy-orange);
  border-bottom-color: var(--deploy-orange);
}

.method-content {
  display: none;
}

.method-content.active {
  display: block;
}

.troubleshooting {
  background: #FFF3E0;
  border: 1px solid #FFE0B2;
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.troubleshooting h3 {
  color: #E65100;
  margin-bottom: 1rem;
}

.troubleshooting .issue {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px dashed #FFE0B2;
}

.troubleshooting .issue:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.troubleshooting .issue-title {
  font-weight: 600;
  color: var(--danger);
  margin-bottom: 0.25rem;
}

.troubleshooting .issue-solution {
  color: var(--text);
  font-size: 0.9rem;
}

/* ========================================
   Navigation (Prev / Next)
   ======================================== */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.chapter-nav a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9rem;
  transition: all 0.2s;
}

.chapter-nav a:hover {
  border-color: var(--deploy-orange);
  background: #FFF3E0;
  text-decoration: none;
}

.chapter-nav .prev::before { content: '\2190  '; }
.chapter-nav .next::after { content: '  \2192'; }

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 900px) {
  .page-layout { flex-direction: column; padding: 1rem; }
  .sidebar { width: 100%; position: static; max-height: none; }
  .chapter-grid { grid-template-columns: 1fr; }
  .chapter-header h1 { font-size: 1.5rem; }
}

@media print {
  .site-header, .sidebar, .chapter-nav, .copy-btn { display: none; }
  .main-content { max-width: 100%; }
  pre { white-space: pre-wrap; }
}