/* =============================================
   Büyük Veri Teknolojileri - Ders Notları
   Ortak Stil Dosyası
   ============================================= */

/* --- CSS Variables / Tema Renkleri --- */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f6f8fa;
  --bg-code: #f4f4f8;
  --bg-card: #ffffff;
  --bg-info: #e8f4fd;
  --bg-warning: #fff8e1;
  --bg-success: #e8f5e9;
  --bg-tip: #f3e8fd;
  --bg-danger: #ffeef0;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-muted: #6e7191;
  --border-color: #e2e8f0;
  --border-code: #d1d9e0;
  --accent: #2563eb;
  --accent-light: #dbeafe;
  --accent-dark: #1d4ed8;
  --info-border: #3b82f6;
  --warning-border: #f59e0b;
  --success-border: #22c55e;
  --tip-border: #a855f7;
  --danger-border: #ef4444;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --code-keyword: #d73a49;
  --code-string: #032f62;
  --code-function: #6f42c1;
  --code-comment: #6a737d;
  --code-number: #005cc5;
  --code-operator: #d73a49;
  --radius: 10px;
  --header-bg: linear-gradient(135deg, #1e3a5f 0%, #2563eb 50%, #7c3aed 100%);
  --nav-bg: #f8fafc;
  --nav-border: #e2e8f0;
  --toc-hover: #f1f5f9;
}

[data-theme="dark"] {
  --bg-primary: #0d1117;
  --bg-secondary: #161b22;
  --bg-code: #1a1f2b;
  --bg-card: #161b22;
  --bg-info: #0c2d48;
  --bg-warning: #2d2206;
  --bg-success: #0d2818;
  --bg-tip: #1f0a33;
  --bg-danger: #2d0a0a;
  --text-primary: #e6edf3;
  --text-secondary: #b1bac4;
  --text-muted: #8b949e;
  --border-color: #30363d;
  --border-code: #3d444d;
  --accent: #58a6ff;
  --accent-light: #1a2f4a;
  --accent-dark: #79c0ff;
  --info-border: #58a6ff;
  --warning-border: #d29922;
  --success-border: #3fb950;
  --tip-border: #bc8cff;
  --danger-border: #f85149;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.4);
  --code-keyword: #ff7b72;
  --code-string: #a5d6ff;
  --code-function: #d2a8ff;
  --code-comment: #8b949e;
  --code-number: #79c0ff;
  --code-operator: #ff7b72;
  --header-bg: linear-gradient(135deg, #0d1117 0%, #161b22 50%, #1a1040 100%);
  --nav-bg: #161b22;
  --nav-border: #30363d;
  --toc-hover: #1c2333;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  transition: background 0.3s ease, color 0.3s ease;
}

/* --- Top Navigation --- */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  border-bottom: 1px solid var(--nav-border);
  backdrop-filter: blur(10px);
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.top-nav .nav-brand {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent);
  text-decoration: none;
}

.top-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.top-nav .nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  transition: all 0.2s;
}

.top-nav .nav-links a:hover,
.top-nav .nav-links a.active {
  background: var(--accent-light);
  color: var(--accent);
}

/* Theme Toggle */
.theme-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  cursor: pointer;
  padding: 6px 12px;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.3s;
  color: var(--text-primary);
}

.theme-toggle:hover {
  border-color: var(--accent);
}

/* --- Hero Header --- */
.hero {
  background: var(--header-bg);
  color: #fff;
  padding: 6rem 2rem 3rem;
  margin-top: 56px;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.hero .subtitle {
  font-size: 1.15rem;
  opacity: 0.9;
  max-width: 700px;
  margin: 0 auto;
  font-weight: 400;
}

.hero .week-badge {
  display: inline-block;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255,255,255,0.3);
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: 0.5px;
}

.hero .meta-info {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 1.5rem;
  font-size: 0.9rem;
  opacity: 0.85;
}

.hero .meta-info span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* --- Main Layout --- */
.main-container {
  display: flex;
  max-width: 1400px;
  margin: 0 auto;
  gap: 0;
}

/* --- Sidebar TOC --- */
.sidebar {
  width: 280px;
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  overflow-y: auto;
  border-right: 1px solid var(--border-color);
  padding: 1.5rem 0;
  flex-shrink: 0;
  background: var(--bg-primary);
  scrollbar-width: thin;
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.sidebar .toc-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  padding: 0 1.25rem;
  margin-bottom: 0.75rem;
}

.sidebar .chapter-list {
  padding: 0 0.5rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
}

.sidebar .chapter-list a {
  display: block;
  padding: 0.45rem 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.82rem;
  line-height: 1.4;
  border-radius: 6px;
  transition: all 0.2s;
}

.sidebar .chapter-list a:hover {
  background: var(--toc-hover);
  color: var(--accent);
}

.sidebar .chapter-list a.current-page {
  color: var(--accent);
  background: var(--accent-light);
  font-weight: 600;
}

.sidebar nav a {
  display: block;
  padding: 0.4rem 1.25rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.83rem;
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: all 0.2s;
}

.sidebar nav a:hover {
  background: var(--toc-hover);
  color: var(--accent);
}

.sidebar nav a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-light);
  font-weight: 600;
}

.sidebar nav a.toc-h3 {
  padding-left: 2.25rem;
  font-size: 0.8rem;
}

.sidebar nav a.toc-h4 {
  padding-left: 3.25rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* --- Fun / Meme Images --- */
.meme-box {
  text-align: center;
  margin: 1.5rem 0 2rem;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.meme-box img {
  max-width: 420px;
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.meme-box .meme-caption {
  margin-top: 0.6rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
}

/* --- Content Area --- */
.content {
  flex: 1;
  min-width: 0;
  padding: 2.5rem 3rem;
  max-width: 900px;
}

/* --- Typography --- */
.content h2 {
  font-size: 1.85rem;
  font-weight: 800;
  margin: 3rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--border-color);
  color: var(--text-primary);
}

.content h2:first-of-type { margin-top: 0; }

.content h3 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 2.25rem 0 0.75rem;
  color: var(--text-primary);
}

.content h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.75rem 0 0.5rem;
  color: var(--text-secondary);
}

.content p {
  margin: 0.75rem 0;
  color: var(--text-secondary);
}

.content ul, .content ol {
  margin: 0.75rem 0;
  padding-left: 1.5rem;
}

.content li {
  margin: 0.35rem 0;
  color: var(--text-secondary);
}

.content a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.content a:hover { text-decoration: underline; }

.content strong { color: var(--text-primary); }

.content hr {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 2.5rem 0;
}

/* --- Inline code --- */
.content code:not(pre code) {
  background: var(--bg-code);
  color: var(--code-keyword);
  padding: 0.15em 0.45em;
  border-radius: 4px;
  font-size: 0.88em;
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  border: 1px solid var(--border-code);
}

/* --- Code Blocks --- */
.code-block {
  position: relative;
  margin: 1.25rem 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-code);
  box-shadow: var(--shadow-sm);
}

.code-block .code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-code);
  padding: 0.5rem 1rem;
  font-size: 0.8rem;
}

.code-block .code-lang {
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.code-block .code-lang::before {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #3572A5;
}

.code-block .code-lang.lang-json::before { background: #f1e05a; }
.code-block .code-lang.lang-csv::before { background: #22c55e; }
.code-block .code-lang.lang-bash::before { background: #89e051; }
.code-block .code-lang.lang-sql::before { background: #e38c00; }
.code-block .code-lang.lang-text::before { background: #8b949e; }

.code-actions {
  display: flex;
  gap: 0.4rem;
}

.code-actions button {
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
  transition: all 0.2s;
}

.code-actions button:hover {
  background: var(--accent-light);
  color: var(--accent);
  border-color: var(--accent);
}

.code-actions button.copied {
  background: var(--bg-success);
  color: var(--success-border);
  border-color: var(--success-border);
}

.code-block pre {
  margin: 0;
  padding: 1rem 1.25rem;
  overflow-x: auto;
  background: var(--bg-code);
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.85rem;
  line-height: 1.1;
  counter-reset: line;
}

.code-block pre code {
  font-family: inherit;
}

/* Line numbers */
.code-block pre.line-numbers {
  padding-left: 3.5rem;
}

.code-block pre.line-numbers code .line {
  display: block;
  position: relative;
  min-height: 1.1em;
  line-height: 1.1;
}

.code-block pre.line-numbers code .line::before {
  counter-increment: line;
  content: counter(line);
  position: absolute;
  left: -2.75rem;
  width: 2rem;
  text-align: right;
  color: var(--text-muted);
  opacity: 0.5;
  font-size: 0.78rem;
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  line-height: 1.1;
}

/* --- Runnable Code --- */
.code-block .run-output {
  border-top: 1px solid var(--border-code);
  background: var(--bg-secondary);
  padding: 0.75rem 1.25rem;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.83rem;
  white-space: pre-wrap;
  color: var(--text-secondary);
  max-height: 300px;
  overflow-y: auto;
  display: none;
}

.code-block .run-output.visible { display: block; }

.code-block .run-output .output-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--success-border);
  margin-bottom: 0.4rem;
  display: block;
}

.code-block .run-output .output-error {
  color: var(--danger-border);
}

/* --- Syntax Highlighting (Highlight.js overrides) --- */
.hljs { background: transparent !important; padding: 0 !important; }
.hljs-keyword, .hljs-selector-tag, .hljs-type { color: var(--code-keyword); font-weight: 600; }
.hljs-string, .hljs-doctag, .hljs-regexp { color: var(--code-string); }
.hljs-title, .hljs-title\.function_, .hljs-title\.class_ { color: var(--code-function); }
.hljs-comment { color: var(--code-comment); font-style: italic; }
.hljs-number { color: var(--code-number); }
.hljs-operator, .hljs-punctuation { color: var(--code-operator); }
.hljs-built_in { color: var(--code-function); }
.hljs-meta, .hljs-meta .hljs-keyword { color: var(--code-number); }
.hljs-literal { color: var(--code-number); font-weight: 600; }
.hljs-attr { color: var(--code-keyword); }
.hljs-variable, .hljs-template-variable { color: var(--text-primary); }
.hljs-params { color: var(--text-secondary); }
.hljs-section, .hljs-name { color: var(--code-function); }
.hljs-addition { color: var(--code-string); background: rgba(63,185,80,0.1); }
.hljs-deletion { color: var(--code-keyword); background: rgba(248,81,73,0.1); }

/* --- Alert Boxes --- */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin: 1.25rem 0;
  border-left: 4px solid;
  font-size: 0.92rem;
}

.alert-title {
  font-weight: 700;
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
}

.alert-info {
  background: var(--bg-info);
  border-color: var(--info-border);
}

.alert-warning {
  background: var(--bg-warning);
  border-color: var(--warning-border);
}

.alert-success {
  background: var(--bg-success);
  border-color: var(--success-border);
}

.alert-tip {
  background: var(--bg-tip);
  border-color: var(--tip-border);
}

.alert-danger {
  background: var(--bg-danger);
  border-color: var(--danger-border);
}

/* --- Tables --- */
.table-wrapper {
  overflow-x: auto;
  margin: 1.25rem 0;
  border-radius: var(--radius);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.content thead {
  background: var(--bg-secondary);
}

.content th {
  padding: 0.75rem 1rem;
  text-align: left;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-color);
  font-size: 0.85rem;
  white-space: nowrap;
}

.content td {
  padding: 0.65rem 1rem;
  border-bottom: 1px solid var(--border-color);
  color: var(--text-secondary);
}

.content tbody tr:hover {
  background: var(--bg-secondary);
}

.content tbody tr:last-child td {
  border-bottom: none;
}

/* --- Cards --- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin: 1.25rem 0;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.3s;
}

.card:hover { box-shadow: var(--shadow-md); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0;
}

.card-grid .card {
  margin: 0;
}

.card .card-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.card .card-title {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.card .card-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* --- Diagram Container --- */
.diagram-container {
  margin: 1.5rem 0;
  text-align: center;
}

.diagram-container .diagram-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: inline-block;
  box-shadow: var(--shadow-sm);
  max-width: 100%;
  overflow-x: auto;
}

.diagram-container .diagram-caption {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  font-style: italic;
}

/* Mermaid overrides for dark mode */
[data-theme="dark"] .mermaid text { fill: var(--text-primary) !important; }

/* --- Progress Bar (for objectives) --- */
.objectives-list {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
}

.objectives-list li {
  padding: 0.6rem 0.75rem;
  margin: 0.4rem 0;
  background: var(--bg-secondary);
  border-radius: 6px;
  border-left: 3px solid var(--accent);
  font-size: 0.9rem;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}

.objectives-list li .obj-icon {
  flex-shrink: 0;
  font-size: 1.1rem;
}

/* --- Comparison Split --- */
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.25rem 0;
}

.comparison .side {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.comparison .side-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-primary);
}

/* --- Footer --- */
.page-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem;
  text-align: center;
  margin-top: 4rem;
}

.page-footer .footer-nav {
  display: none;
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1rem;
}

.page-footer .footer-nav a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  padding: 0.6rem 1.5rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  transition: all 0.2s;
}

.page-footer .footer-nav a:hover {
  background: var(--accent);
  color: #fff;
}

.page-footer .footer-text {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* --- Pyodide Loading --- */
.pyodide-status {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  padding: 0.5rem 1rem;
  font-size: 0.78rem;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  z-index: 500;
  transition: all 0.3s;
}

.pyodide-status.ready {
  border-color: var(--success-border);
}

.pyodide-status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warning-border);
  animation: pulse 1.5s infinite;
}

.pyodide-status.ready .dot {
  background: var(--success-border);
  animation: none;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* --- Scroll to top --- */
.scroll-top {
  position: fixed;
  bottom: 1.5rem;
  left: 1.5rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  font-size: 1.1rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: 500;
  transition: all 0.3s;
}

.scroll-top.visible { display: flex; }
.scroll-top:hover { transform: translateY(-2px); }

/* --- Responsive --- */
@media (max-width: 1024px) {
  .sidebar { display: none; }
  .content { padding: 2rem 1.5rem; max-width: 100%; }
  .hero h1 { font-size: 1.8rem; }
  .comparison { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .hero { padding: 5rem 1rem 2rem; }
  .hero h1 { font-size: 1.5rem; }
  .hero .meta-info { flex-direction: column; gap: 0.5rem; }
  .content { padding: 1.5rem 1rem; }
  .card-grid { grid-template-columns: 1fr; }
  .top-nav { padding: 0 1rem; }
  .top-nav .nav-links a span { display: none; }
}

/* --- Print --- */
@media print {
  .top-nav, .sidebar, .theme-toggle, .scroll-top, .pyodide-status, .code-actions { display: none !important; }
  .content { max-width: 100%; padding: 1rem; }
  .hero { padding: 2rem 1rem; margin-top: 0; }
  body { font-size: 11pt; }
}