/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  /* Colors */
  --primary-color: #3b82f6;
  --secondary-color: #10b981;
  --accent-color: #f59e0b;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-light: #9ca3af;
  --background: #ffffff;
  --background-light: #f8fafc;
  --background-dark: #f1f5f9;
  --border-color: #e5e7eb;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;

  /* Typography */
  --font-family-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-family-heading: 'Poppins', sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;
  --spacing-32: 8rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== RESET & BASE STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  list-style: none;
  text-decoration: none;
}

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

body {
  font-family: var(--font-family-primary);
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--background);
  overflow-x: hidden;
}

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

a {
  color: inherit;
  transition: var(--transition-fast);
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
  transition: var(--transition-fast);
}

ul, ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

/* ===== BUTTON STYLES ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  background: var(--primary-color);
  color: white;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: var(--transition);
  border: 2px solid var(--primary-color);
}

.btn-primary:hover {
  background: #2563eb;
  border-color: #2563eb;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-base);
  transition: var(--transition);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-appointment {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  background: var(--secondary-color);
  color: white;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: var(--transition);
  border: 2px solid var(--secondary-color);
}

.btn-appointment:hover {
  background: #059669;
  border-color: #059669;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ===== HEADER STYLES ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  transition: var(--transition);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-6) var(--spacing-4);
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
}

.nav-brand {
  flex: 0 0 auto;
}

.nav-brand .logo {
  height: 80px;
  width: auto;
  max-width: 250px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-8);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-link {
  font-family: var(--font-family-heading);
  font-weight: 600;
  font-size: var(--font-size-lg);
  color: var(--text-primary);
  transition: var(--transition-fast);
  position: relative;
  letter-spacing: -0.025em;
}

.nav-link:hover {
  color: var(--primary-color);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: var(--transition-fast);
}

.nav-link:hover::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 3px;
  padding: var(--spacing-2);
}

.hamburger-line {
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

.mobile-menu {
  position: fixed;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border-top: 1px solid var(--border-color);
  box-shadow: var(--shadow-xl);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
    z-index: 999;
}

.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  padding: var(--spacing-6) var(--spacing-4);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
}

.mobile-nav-link {
  padding: var(--spacing-3) 0;
  border-bottom: 1px solid var(--border-color);
  font-weight: 500;
  color: var(--text-primary);
}

.mobile-appointment {
  margin-top: var(--spacing-4);
  justify-content: center;
}

/* ===== PAGE HEADER ===== */
.page-header {
  background: var(--background-light);
  color: var(--text-primary);
  padding: calc(100px + var(--spacing-16)) 0 var(--spacing-16);
    text-align: center;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border-color);
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(59,130,246,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  opacity: 0.3;
}

.page-title {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-4);
  position: relative;
  z-index: 1;
  color: var(--text-primary);
}

.page-subtitle {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  font-weight: 400;
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-secondary);
}

/* ===== TREATMENTS SECTION ===== */
.treatments-section {
  padding: var(--spacing-24) 0;
  background: var(--background);
}

.treatments-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-8);
  max-width: 1200px;
  margin: 0 auto;
}

.treatment-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-color);
  cursor: pointer;
  position: relative;
}

.treatment-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

/* Prostat kartını öne çıkar */
.treatment-card[data-treatment="prostat"] {
  border: 2px solid var(--primary-color);
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, white 100%);
  position: relative;
}

.treatment-card[data-treatment="prostat"]::before {
  content: '🔥 Yeni İçerikler';
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--primary-color);
  color: white;
  padding: 4px 8px;
  border-radius: var(--radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
  z-index: 2;
}

.treatment-card[data-treatment="prostat"]:hover {
  transform: translateY(-12px);
  box-shadow: 0 20px 40px rgba(59, 130, 246, 0.3);
}

.treatment-image {
  position: relative;
  height: 200px;
  overflow: hidden;
}

.treatment-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.treatment-card:hover .treatment-image img {
  transform: scale(1.05);
}

.treatment-content {
  padding: var(--spacing-6);
}

.treatment-content h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
  line-height: 1.3;
}

.treatment-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-6);
  line-height: 1.6;
}

.treatment-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--primary-color);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.treatment-link:hover {
  color: #2563eb;
  transform: translateX(4px);
}

.treatment-link i {
  transition: var(--transition-fast);
}

.treatment-link:hover i {
  transform: translateX(2px);
}

/* ===== FEATURED INFO ===== */
.featured-info {
  padding: var(--spacing-24) 0;
  background: var(--background-light);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-8);
  max-width: 1000px;
  margin: 0 auto;
}

.info-card {
  background: white;
  padding: var(--spacing-8);
  border-radius: var(--radius-xl);
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.info-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--primary-color), #2563eb);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-6);
  color: white;
  font-size: var(--font-size-2xl);
}

.info-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

.info-card p {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== FOOTER ===== */
.footer {
  background: #f8fafc;
  padding: var(--spacing-16) 0 var(--spacing-8);
  border-top: 1px solid #e2e8f0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-8);
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.footer-section h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
}

.footer-section p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-3);
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-2);
}

.footer-section ul li a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  display: inline-block;
  position: relative;
}

.footer-section ul li a:hover {
  color: var(--primary-color);
  transform: translateX(4px);
}

.footer-section ul li a::before {
  content: '';
  position: absolute;
  left: -8px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 3px;
  background: var(--primary-color);
  border-radius: 50%;
  opacity: 0;
  transition: var(--transition-fast);
}

.footer-section ul li a:hover::before {
  opacity: 1;
}

.footer-logo {
  height: 80px;
  width: auto;
  margin-bottom: var(--spacing-6);
  filter: brightness(1.1);
}

.social-links {
  display: flex;
  gap: var(--spacing-4);
  margin-top: var(--spacing-4);
}

.social-links a {
  width: 45px;
  height: 45px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: var(--font-size-lg);
}

.social-links a:hover {
  background: var(--primary-color);
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-8);
  text-align: center;
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-sm);
}

/* ===== STICKY FOOTER ===== */
.sticky-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--border-color);
  z-index: 999;
  padding: var(--spacing-3) 0;
}

.sticky-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-4);
}

.sticky-content .social-links {
  margin-top: 0;
  align-items: center;
}

.phone-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--text-primary);
  font-weight: 500;
}

.sticky-appointment {
  padding: var(--spacing-2) var(--spacing-4);
  background: var(--secondary-color);
  color: white;
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: var(--transition);
}

.sticky-appointment:hover {
  background: #059669;
  transform: translateY(-2px);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
  .treatments-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
  }
  
  .info-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-6);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .page-header {
    padding: calc(80px + var(--spacing-12)) 0 var(--spacing-12);
  }
  
  .page-title {
    font-size: var(--font-size-3xl);
  }
  
  .treatments-section,
  .featured-info {
    padding: var(--spacing-16) 0;
  }
  
  .treatments-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }
  
  .treatment-card {
    margin: 0 var(--spacing-2);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-8);
  }

  .sticky-content {
    flex-direction: column;
    gap: var(--spacing-3);
  }

  .phone-info {
    font-size: var(--font-size-sm);
  }

  .sticky-appointment {
    padding: var(--spacing-2) var(--spacing-3);
    font-size: var(--font-size-sm);
  }

  .social-links {
    gap: var(--spacing-2);
  }
}

@media (max-width: 480px) {
  .page-title {
    font-size: var(--font-size-2xl);
  }
  
  .treatments-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }
  
  .treatment-content {
    padding: var(--spacing-4);
  }
  
  .info-card {
    padding: var(--spacing-6);
  }
  
  .footer-content {
    grid-template-columns: 1fr !important;
    gap: var(--spacing-8);
    text-align: center;
  }
  
  .sticky-content {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-2);
    flex-wrap: wrap;
  }
  
  .phone-info {
    display: none;
  }
  
  .sticky-buttons {
    order: 1;
    flex: 1 1 auto;
    gap: var(--spacing-2);
  }
  
  .social-links {
    order: 2;
    gap: var(--spacing-2);
  }
}

/* ===== ACCESSIBILITY & PERFORMANCE ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

*:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.loading {
  opacity: 0.6;
  pointer-events: none;
}

.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== TREATMENT DETAIL PAGE STYLES ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-4);
  font-size: var(--font-size-sm);
}

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

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

.breadcrumb i {
  color: var(--text-light);
  font-size: var(--font-size-xs);
}

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

.treatment-detail-section {
  padding: var(--spacing-24) 0;
  background: var(--background);
}

.detail-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--spacing-8);
  max-width: 1400px;
  margin: 0 auto;
}

/* ===== SIDEBAR STYLES ===== */
.detail-sidebar {
  position: sticky;
  top: calc(100px + var(--spacing-6));
  height: fit-content;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-6);
}

.toc-card,
.summary-card,
.related-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
}

.toc-card h3,
.summary-card h3,
.related-card h3 {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-2);
  border-bottom: 1px solid var(--border-color);
}

.toc-card h3 i,
.summary-card h3 i,
.related-card h3 i {
  color: var(--primary-color);
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.toc-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
  cursor: pointer;
  border-left: 3px solid transparent;
}

.toc-item:hover {
  background: var(--background-light);
  color: var(--primary-color);
  border-left-color: var(--primary-color);
}

.toc-item.active {
  background: var(--background-light);
  color: var(--primary-color);
  border-left-color: var(--primary-color);
  font-weight: 500;
}

.toc-emoji {
  font-size: 1.1em;
  margin-right: var(--spacing-2);
  display: inline-block;
  width: 20px;
  text-align: center;
}

.toc-title {
  flex: 1;
  font-size: var(--font-size-sm);
  line-height: 1.4;
}

.content-heading {
  display: block;
  font-weight: 600;
  font-size: 1.1em;
  color: var(--primary-color);
  margin: var(--spacing-6) 0 var(--spacing-3) 0;
  padding: var(--spacing-2) 0;
  border-bottom: 1px solid rgba(59, 130, 246, 0.2);
  scroll-margin-top: var(--spacing-8);
}

.summary-content {
  font-size: var(--font-size-sm);
  line-height: 1.6;
  color: var(--text-secondary);
}

.category-info {
  margin-bottom: var(--spacing-4);
  padding: var(--spacing-3);
  background: var(--background-light);
  border-radius: var(--radius);
  border-left: 4px solid var(--primary-color);
}

.category-info h4 {
  color: var(--primary-color);
  margin-bottom: var(--spacing-1);
  font-size: var(--font-size-md);
  font-weight: 600;
}

.category-info p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.related-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  padding: var(--spacing-3);
  border-radius: var(--radius);
  background: white;
  border: 1px solid var(--border-color);
  transition: var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.related-item:hover {
  background: var(--background-light);
  border-color: var(--primary-color);
  transform: translateX(4px);
  box-shadow: var(--shadow);
}

.related-icon {
  font-size: 1.2rem;
  min-width: 24px;
  flex-shrink: 0;
}

.related-content {
  flex: 1;
}

.related-content h4 {
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin: 0 0 var(--spacing-1) 0;
  line-height: 1.3;
}

.related-content p {
  color: var(--text-secondary);
  font-size: var(--font-size-xs);
  margin: 0;
  line-height: 1.2;
}

.related-item:hover .related-content h4 {
  color: var(--primary-color);
}

.related-item:hover .related-content p {
  color: var(--text-primary);
}

.related-item .fas.fa-chevron-right {
  color: var(--text-secondary);
  font-size: 0.8rem;
  transition: var(--transition-fast);
}

.related-item:hover .fas.fa-chevron-right {
  color: var(--primary-color);
  transform: translateX(2px);
}

.no-related {
  color: var(--text-secondary);
  font-style: italic;
  text-align: center;
  padding: var(--spacing-4);
}

/* ===== MAIN CONTENT STYLES ===== */
.detail-content {
  min-height: 800px;
}

.back-navigation {
  margin-bottom: var(--spacing-8);
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-4);
  background: var(--background-light);
  color: var(--text-primary);
  border-radius: var(--radius-lg);
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid var(--border-color);
}

.back-btn:hover {
  background: var(--primary-color);
  color: white;
  transform: translateX(-4px);
  box-shadow: var(--shadow);
}

.articles-section h2 {
    display: flex;
    align-items: center;
  gap: var(--spacing-3);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-8);
  padding-bottom: var(--spacing-4);
  border-bottom: 2px solid var(--border-color);
}

.articles-section h2 i {
  color: var(--primary-color);
}

/* ===== ARTICLES HEADER ===== */
.articles-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-6);
  flex-wrap: wrap;
  gap: var(--spacing-4);
}

.back-to-categories-btn {
  background: var(--background-light);
  color: var(--primary-color);
  border: 1px solid var(--border-color);
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
    display: flex;
    align-items: center;
  gap: var(--spacing-2);
}

.back-to-categories-btn:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-1px);
}

.back-to-categories-btn i {
  font-size: var(--font-size-xs);
}

@media (max-width: 768px) {
  .articles-header {
  flex-direction: column;
    align-items: flex-start;
  }
  
  .back-to-categories-btn {
    align-self: flex-end;
  }
}

/* ===== SUB-CATEGORIES STYLES ===== */
.sub-categories {
  margin-bottom: var(--spacing-8);
}

.sub-categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-8);
}

.sub-category-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.sub-category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.15);
  border-color: var(--primary-color);
}

.sub-category-icon {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--spacing-4);
  color: var(--primary-color);
}

.sub-category-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-2);
}

.sub-category-card p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  margin-bottom: var(--spacing-4);
}

.sub-category-count {
  background: var(--background-light);
  color: var(--primary-color);
  padding: var(--spacing-1) var(--spacing-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.sub-category-card:hover .sub-category-count {
  background: var(--primary-color);
  color: white;
}

/* ===== LOADING & ERROR STATES ===== */
.loading-state,
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-20);
  text-align: center;
}

.loading-spinner i {
  font-size: var(--font-size-3xl);
  color: var(--primary-color);
  margin-bottom: var(--spacing-4);
}

.loading-state p {
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
}

.error-icon i {
  font-size: var(--font-size-4xl);
  color: var(--error-color);
  margin-bottom: var(--spacing-4);
}

.error-state h3 {
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
}

.error-state p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-6);
  max-width: 400px;
}

.retry-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  background: var(--primary-color);
  color: white;
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: var(--transition);
}

.retry-btn:hover {
  background: #2563eb;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ===== ARTICLES GRID ===== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-6);
  margin-bottom: var(--spacing-8);
}

.article-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-6);
  box-shadow: var(--shadow);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: pointer;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.article-card h3 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-3);
  line-height: 1.3;
}

.article-card .article-excerpt {
  margin-bottom: var(--spacing-4);
}

.article-card .article-excerpt p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-3);
  line-height: 1.7;
  font-size: var(--font-size-base);
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: auto;
}

.read-article-btn {
  background: var(--primary-color);
  color: white;
  padding: var(--spacing-2) var(--spacing-4);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  transition: var(--transition);
}

.read-article-btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.read-article-btn i {
  font-size: 0.875rem;
}

.no-articles {
  text-align: center;
  color: var(--text-secondary);
  font-style: italic;
  padding: var(--spacing-8);
  background: var(--background-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
}

.keywords {
  margin-top: var(--spacing-4);
  padding: var(--spacing-3);
  background: var(--background-light);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary-color);
}

.keywords strong {
  color: var(--primary-color);
  font-weight: 600;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-sm);
  color: var(--text-light);
  margin-bottom: var(--spacing-4);
  padding-top: var(--spacing-3);
  border-top: 1px solid var(--border-color);
}

.read-time {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
}

.article-source {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  font-size: var(--font-size-xs);
  opacity: 0.8;
  text-transform: capitalize;
}

/* ===== PAGINATION ===== */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-2);
  margin-top: var(--spacing-8);
}

.pagination-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: white;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
}

.pagination-btn:hover:not(:disabled) {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.pagination-btn.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== ARTICLE MODAL ===== */
.article-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-4);
}

.article-modal.active {
  display: flex;
}

.modal-content {
  background: white;
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 1200px;
  max-height: 90vh;
  display: grid;
  grid-template-rows: auto 1fr;
  grid-template-columns: 250px 1fr;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

.modal-header {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-6);
  border-bottom: 1px solid var(--border-color);
  background: var(--background-light);
}

.modal-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0;
}

.modal-close {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--error-color);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.modal-close:hover {
  background: #dc2626;
  transform: scale(1.1);
}

.modal-sidebar {
  background: var(--background-light);
  border-right: 1px solid var(--border-color);
  padding: var(--spacing-6);
  overflow-y: auto;
}

.article-toc {
  position: sticky;
  top: 0;
}

.article-toc h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-4);
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.modal-toc-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.modal-toc-item {
  display: flex;
  align-items: center;
  padding: var(--spacing-2) var(--spacing-3);
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  transition: var(--transition-fast);
  cursor: pointer;
  border-left: 3px solid transparent;
}

.modal-toc-item:hover {
  background: var(--background-light);
  color: var(--primary-color);
  border-left-color: var(--primary-color);
}

.modal-toc-emoji {
  font-size: 1em;
  margin-right: var(--spacing-2);
  display: inline-block;
  width: 18px;
  text-align: center;
}

.modal-toc-title {
  flex: 1;
  font-size: var(--font-size-xs);
  line-height: 1.3;
}

.no-toc {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  font-style: italic;
  text-align: center;
  padding: var(--spacing-4);
}

.modal-body {
  padding: var(--spacing-6);
  overflow-y: auto;
}

.article-content {
  max-width: none;
  line-height: 1.8;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--text-primary);
  margin-top: var(--spacing-6);
  margin-bottom: var(--spacing-4);
  scroll-margin-top: var(--spacing-6);
}

.article-content h1 {
  font-size: var(--font-size-2xl);
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: var(--spacing-2);
}

.article-content h2 {
  font-size: var(--font-size-xl);
}

.article-content h3 {
  font-size: var(--font-size-lg);
}

.article-content p {
  margin-bottom: var(--spacing-4);
  color: var(--text-secondary);
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--spacing-4);
  padding-left: var(--spacing-6);
}

.article-content li {
  margin-bottom: var(--spacing-2);
  color: var(--text-secondary);
}

/* ===== RESPONSIVE DESIGN FOR DETAIL PAGE ===== */
@media (max-width: 1024px) {
  .detail-layout {
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-6);
  }

  .modal-content {
    grid-template-columns: 200px 1fr;
  }
}

@media (max-width: 768px) {
  .detail-layout {
    grid-template-columns: 1fr;
    gap: var(--spacing-6);
  }

  .detail-sidebar {
    position: static;
    order: 2;
  }

  .detail-content {
    order: 1;
  }

  .articles-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-4);
  }

  .modal-content {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto 1fr;
    max-height: 95vh;
  }

  .modal-sidebar {
    border-right: none;
    border-bottom: 1px solid var(--border-color);
    max-height: 200px;
  }

  .breadcrumb {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .treatment-detail-section {
    padding: var(--spacing-16) 0;
  }

  .article-card {
    padding: var(--spacing-4);
  }

  .modal-content {
    margin: var(--spacing-2);
    max-height: calc(100vh - var(--spacing-4));
  }

  .modal-header,
  .modal-sidebar,
  .modal-body {
    padding: var(--spacing-4);
  }
}

@media print {
  .header,
  .sticky-footer,
  .mobile-menu {
    display: none;
  }

  body {
    background: white;
    color: black;
  }

  .page-header,
  .treatments-section,
  .featured-info {
    break-inside: avoid;
  }
}

/* Tedaviler Dropdown Menü Düzeltme */
.dropdown-parent {
  position: relative;
}
.dropdown-parent .dropdown {
  display: none;
  position: absolute;
  left: 0;
  top: 100%;
  background: #fff;
  min-width: 220px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
  border-radius: 0 0 12px 12px;
  z-index: 100;
}
.dropdown-parent:hover .dropdown,
.dropdown-parent:focus-within .dropdown {
  display: block;
}
.dropdown li a {
  display: block;
  padding: 12px 24px;
  color: #1a6fa3;
  font-weight: 500;
  text-align: left;
  white-space: nowrap;
  transition: background 0.2s;
}
.dropdown li a:hover {
  background: #f1f5f9;
  color: #0070f3;
}
@media (max-width: 992px) {
  .dropdown-parent .dropdown {
    display: none !important;
  }
}
/* Dropdown Menü Sonu */