/* ===================================
   Study Notes - Dark Mode Theme
   Bilgisayar Mimarisi Çalışma Notları
   =================================== */

:root {
  /* Color Palette - Neon Accent Dark */
  --bg-primary: #0a0a0f;
  --bg-secondary: #12121a;
  --bg-tertiary: #1a1a24;
  --bg-card: #16161f;

  --text-primary: #e8e8ed;
  --text-secondary: #a0a0b0;
  --text-muted: #6a6a7a;

  --accent-primary: #6366f1;
  --accent-secondary: #8b5cf6;
  --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);

  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  --border-color: #2a2a3a;
  --border-glow: rgba(99, 102, 241, 0.3);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ===================================
   Reset & Base
   =================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Background Pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(139, 92, 246, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

/* ===================================
   Typography
   =================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 1.75rem;
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--border-color);
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent-gradient);
}

h3 {
  font-size: 1.35rem;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  color: var(--accent-primary);
}

h4 {
  font-size: 1.1rem;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-secondary);
  text-decoration: underline;
}

/* ===================================
   Layout
   =================================== */

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

/* ===================================
   Header & Navigation
   =================================== */

.header {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--spacing-sm);
  padding-bottom: var(--spacing-sm);
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
  text-decoration: none;
}

/* ===================================
   Breadcrumb
   =================================== */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) 0;
  font-size: 0.875rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-secondary);
}

.breadcrumb a:hover {
  color: var(--accent-primary);
}

.breadcrumb-separator {
  color: var(--text-muted);
}

.breadcrumb-current {
  color: var(--text-primary);
}

/* ===================================
   Main Content
   =================================== */

.main-content {
  padding: var(--spacing-xl) 0;
}

.module-header {
  margin-bottom: var(--spacing-2xl);
}

.module-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--spacing-sm);
}

.module-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

/* ===================================
   Content Cards
   =================================== */

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--border-glow);
  box-shadow: 0 0 20px rgba(99, 102, 241, 0.1);
}

.card-title {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

/* ===================================
   Code Blocks
   =================================== */

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-tertiary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--accent-secondary);
}

pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  position: relative;
}

pre::before {
  content: attr(data-language);
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-md);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
  display: block;
  line-height: 1.6;
}

/* Syntax Highlighting */
.keyword {
  color: #c792ea;
}

.string {
  color: #c3e88d;
}

.number {
  color: #f78c6c;
}

.comment {
  color: #546e7a;
  font-style: italic;
}

.function {
  color: #82aaff;
}

.operator {
  color: #89ddff;
}

.register {
  color: #ffcb6b;
}

.directive {
  color: #f07178;
}

.label {
  color: #c792ea;
}

/* ===================================
   Tables
   =================================== */

.table-wrapper {
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

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

th,
td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border: 1px solid var(--border-color);
}

th {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-weight: 600;
}

td {
  background: var(--bg-card);
  color: var(--text-secondary);
}

tr:hover td {
  background: var(--bg-tertiary);
}

/* ===================================
   Alert Boxes
   =================================== */

.alert {
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  border-left: 4px solid;
}

.alert-info {
  background: rgba(59, 130, 246, 0.1);
  border-color: var(--info);
}

.alert-success {
  background: rgba(16, 185, 129, 0.1);
  border-color: var(--success);
}

.alert-warning {
  background: rgba(245, 158, 11, 0.1);
  border-color: var(--warning);
}

.alert-danger {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--error);
}

.alert-title {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.alert-info .alert-title {
  color: var(--info);
}

.alert-success .alert-title {
  color: var(--success);
}

.alert-warning .alert-title {
  color: var(--warning);
}

.alert-danger .alert-title {
  color: var(--error);
}

/* ===================================
   Lists
   =================================== */

ul,
ol {
  margin: var(--spacing-md) 0;
  padding-left: var(--spacing-xl);
  color: var(--text-secondary);
}

li {
  margin-bottom: var(--spacing-sm);
}

li::marker {
  color: var(--accent-primary);
}

/* Definition Lists */
dl {
  margin: var(--spacing-lg) 0;
}

dt {
  font-weight: 600;
  color: var(--text-primary);
  margin-top: var(--spacing-md);
}

dd {
  margin-left: var(--spacing-lg);
  color: var(--text-secondary);
}

/* ===================================
   Diagrams & Figures
   =================================== */

.diagram {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
  text-align: center;
}

.diagram-title {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--spacing-md);
  font-style: italic;
}

/* ASCII Art Diagrams */
.ascii-diagram {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.4;
  white-space: pre;
  overflow-x: auto;
  color: var(--accent-primary);
}

/* ===================================
   Key Concepts
   =================================== */

.concept {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.concept-title {
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* ===================================
   Navigation Footer
   =================================== */

.nav-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-color);
}

.nav-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  text-decoration: none;
}

.nav-btn-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
}

.nav-btn-title {
  font-weight: 500;
}

/* ===================================
   Footer
   =================================== */

.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-2xl);
  text-align: center;
}

.footer-text {
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* ===================================
   Responsive
   =================================== */

@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: var(--spacing-md);
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .nav-links {
    display: none;
  }

  .nav-footer {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav-btn {
    width: 100%;
    justify-content: center;
  }

  pre {
    padding: var(--spacing-md);
  }
}

/* ===================================
   Animations
   =================================== */

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.main-content {
  animation: fadeIn 0.4s ease-out;
}

/* Scroll indicator for code blocks */
pre::-webkit-scrollbar {
  height: 6px;
}

pre::-webkit-scrollbar-track {
  background: var(--bg-tertiary);
  border-radius: 3px;
}

pre::-webkit-scrollbar-thumb {
  background: var(--accent-primary);
  border-radius: 3px;
}

/* ===================================
   Print Styles
   =================================== */

@media print {
  body {
    background: white;
    color: black;
  }

  .header,
  .footer,
  .nav-footer {
    display: none;
  }

  .card,
  pre {
    border: 1px solid #ccc;
    background: #f9f9f9;
  }
}

/* ===================================
   Tab System
   =================================== */

.tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  background: var(--bg-secondary);
  padding: var(--spacing-sm);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.tab-btn {
  flex: 1;
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.tab-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.tab-btn.active {
  background: var(--accent-gradient);
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease-out;
}

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

/* ===================================
   Quiz Section
   =================================== */

.quiz-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.quiz-question {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.quiz-question:hover {
  border-color: var(--border-glow);
}

.quiz-question h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  margin-top: 0;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.quiz-option {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-tertiary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.quiz-option:hover:not(.answered) {
  background: rgba(99, 102, 241, 0.15);
  border-color: var(--accent-primary);
  color: var(--text-primary);
  transform: translateX(5px);
}

.quiz-option.correct {
  background: rgba(16, 185, 129, 0.2);
  border-color: var(--success);
  color: var(--success);
}

.quiz-option.incorrect {
  background: rgba(239, 68, 68, 0.2);
  border-color: var(--error);
  color: var(--error);
}

.quiz-option.answered {
  cursor: default;
  opacity: 0.7;
}

.quiz-option.answered.correct,
.quiz-option.answered.incorrect {
  opacity: 1;
}

.quiz-result {
  margin-top: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  text-align: center;
}

.quiz-result h3 {
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--accent-primary);
}

.quiz-result p {
  margin: 0;
  font-size: 1.25rem;
}

.quiz-score {
  font-size: 2rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===================================
   Flashcard Section
   =================================== */

.flashcard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.flashcard {
  perspective: 1000px;
  height: 220px;
  cursor: pointer;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  transform-style: preserve-3d;
}

.flashcard.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.flashcard-front {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  color: white;
}

.flashcard-front h3 {
  font-size: 1.15rem;
  margin: 0;
  color: white;
  line-height: 1.4;
}

.flashcard-front .flip-hint {
  position: absolute;
  bottom: var(--spacing-md);
  font-size: 0.75rem;
  opacity: 0.7;
}

.flashcard-back {
  background: linear-gradient(135deg, #8b5cf6 0%, #a855f7 100%);
  color: white;
  transform: rotateY(180deg);
}

.flashcard-back p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.6;
  color: white;
}

.flashcard:hover .flashcard-inner {
  transform: scale(1.02);
}

.flashcard.flipped:hover .flashcard-inner {
  transform: rotateY(180deg) scale(1.02);
}

/* ===================================
   Interactive Responsive
   =================================== */

@media (max-width: 768px) {
  .tabs {
    flex-direction: column;
  }

  .tab-btn {
    width: 100%;
  }

  .flashcard-grid {
    grid-template-columns: 1fr;
  }

  .flashcard {
    height: 180px;
  }

  .quiz-option {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}