/* Deli Sorular - SEO Optimized Static Site */
:root {
  --primary: #7c3aed;
  --primary-light: #a78bfa;
  --primary-dark: #5b21b6;
  --bg: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-sidebar: #f1f5f9;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
  --radius: 8px;
  --sidebar-width: 280px;
  --header-height: 64px;
  --content-max: 800px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
}

/* Layout */
.site-wrapper {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  position: fixed;
  left: 0;
  top: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: transform 0.3s ease;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.logo-icon svg {
  width: 100%;
  height: 100%;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.logo-text span:first-child {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.logo-text span:last-child {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
}

.nav-section {
  padding: 0 12px;
  margin-bottom: 8px;
}

.nav-section-title {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 8px 12px;
}

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

.nav-item {
  margin-bottom: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.nav-link:hover {
  background: rgba(124, 58, 237, 0.08);
  color: var(--primary);
}

.nav-link.active {
  background: rgba(124, 58, 237, 0.12);
  color: var(--primary);
}

.nav-link svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Collapsible Navigation */
.nav-item.has-subitems > .nav-link {
  cursor: pointer;
  position: relative;
}

.nav-item.has-subitems > .nav-link::after {
  content: '';
  width: 8px;
  height: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.2s ease;
  margin-left: auto;
}

.nav-item.has-subitems.expanded > .nav-link::after {
  transform: rotate(45deg);
}

.nav-subitems {
  list-style: none;
  margin-left: 30px;
  margin-top: 4px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.nav-item.has-subitems.expanded > .nav-subitems {
  max-height: 500px;
}

.nav-subitem {
  margin-bottom: 2px;
}

.nav-sublink {
  display: block;
  padding: 6px 12px;
  font-size: 0.875rem;
  color: var(--text-muted);
  border-radius: var(--radius);
  transition: all 0.15s ease;
}

.nav-sublink:hover {
  color: var(--primary);
  background: rgba(124, 58, 237, 0.06);
}

.nav-sublink.active {
  color: var(--primary);
  font-weight: 500;
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s ease;
}

.lang-switch:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

.content-wrapper {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 40px 24px;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

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

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

.breadcrumb-current {
  color: var(--text);
  font-weight: 500;
}

/* Article */
.article-header {
  margin-bottom: 32px;
}

.article-title {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-content {
  font-size: 1.0625rem;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 48px;
  margin-bottom: 16px;
  color: var(--text);
}

.article-content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--text);
}

.article-content p {
  margin-bottom: 20px;
  color: var(--text-secondary);
}

.article-content ul, .article-content ol {
  margin-bottom: 20px;
  padding-left: 24px;
  color: var(--text-secondary);
}

.article-content li {
  margin-bottom: 8px;
}

.article-content strong {
  color: var(--text);
  font-weight: 600;
}

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-content a:hover {
  color: var(--primary-dark);
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  padding-left: 20px;
  margin: 24px 0;
  font-style: italic;
  color: var(--text-secondary);
}

/* Home Page */
.hero {
  text-align: center;
  padding: 60px 0;
  margin-bottom: 48px;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-bottom: 48px;
}

.category-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.2s ease;
}

.category-card:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.category-card-icon {
  width: 48px;
  height: 48px;
  background: rgba(124, 58, 237, 0.1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.category-card-icon svg {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

.category-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.category-card-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.category-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--primary);
}

.category-card-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.15s ease;
}

.category-card:hover .category-card-link svg {
  transform: translateX(4px);
}

/* Article List */
.article-list {
  list-style: none;
}

.article-list-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
}

.article-list-item:last-child {
  border-bottom: none;
}

.article-list-link {
  display: block;
}

.article-list-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  transition: color 0.15s ease;
}

.article-list-link:hover .article-list-title {
  color: var(--primary);
}

.article-list-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* Footer */
.footer {
  margin-top: 64px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Mobile Menu Toggle */
.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 200;
  width: 44px;
  height: 44px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  color: var(--text);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 90;
}

/* Responsive */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 280px;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay.open {
    display: block;
  }

  .main-content {
    margin-left: 0;
  }

  .content-wrapper {
    padding: 80px 16px 40px;
  }

  .hero-title {
    font-size: 1.75rem;
  }

  .article-title {
    font-size: 1.75rem;
  }

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

@media (max-width: 480px) {
  .hero {
    padding: 40px 0;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .article-title {
    font-size: 1.5rem;
  }
}

/* Print Styles */
@media print {
  .sidebar,
  .mobile-menu-btn,
  .lang-switch {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
  }

  .content-wrapper {
    max-width: 100%;
    padding: 0;
  }
}

/* Animations */
@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.logo-icon svg circle {
  animation: spin 20s linear infinite;
}