/* Professional Design System - Cursor Inspired */
:root {
  /* Core Colors - Dark Theme */
  --primary-bg: #0a0a0a;
  --secondary-bg: #141414;
  --tertiary-bg: #1a1a1a;
  --surface-bg: #1e1e1e;
  --elevated-bg: #252525;
  --border-color: #2a2a2a;
  --border-hover: #404040;
  --text-primary: #ffffff;
  --text-secondary: #b4b4b4;
  --text-muted: #707070;
  --accent-primary: #007aff;
  --accent-hover: #0066d9;
  --accent-secondary: #5856d6;
  --success-color: #30d158;
  --warning-color: #ff9f0a;
  --error-color: #ff3b30;
  
  /* Shadows */
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-strong: 0 8px 24px rgba(0, 0, 0, 0.5);
  
  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Typography */
  --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  
  /* Legacy Variables for Compatibility */
  --bg-color: var(--primary-bg);
  --text-color: var(--text-primary);
  --primary-color: var(--accent-primary);
  --primary-hover: var(--accent-hover);
  --card-bg: var(--surface-bg);
  --shadow-color: var(--shadow-subtle);
  --link-color: var(--accent-primary);
  --input-bg: var(--tertiary-bg);
  --nav-bg: var(--secondary-bg);
}

/* Light Theme */
[data-theme="light"] {
  --primary-bg: #ffffff;
  --secondary-bg: #f8f9fa;
  --tertiary-bg: #f1f3f4;
  --surface-bg: #ffffff;
  --elevated-bg: #ffffff;
  --border-color: #e1e5e9;
  --border-hover: #c1c7cd;
  --text-primary: #1a1a1a;
  --text-secondary: #4a4a4a;
  --text-muted: #8a8a8a;
  --accent-primary: #007aff;
  --accent-hover: #0066d9;
  --accent-secondary: #5856d6;
  --success-color: #28a745;
  --warning-color: #fd7e14;
  --error-color: #dc3545;
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.12);
  --shadow-strong: 0 8px 24px rgba(0, 0, 0, 0.16);
  
  /* Legacy Variables for Light Mode */
  --bg-color: var(--primary-bg);
  --text-color: var(--text-primary);
  --card-bg: var(--surface-bg);
  --shadow-color: var(--shadow-subtle);
  --input-bg: var(--tertiary-bg);
  --nav-bg: var(--secondary-bg);
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-main);
  background: var(--primary-bg);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
  transition: all 0.2s ease;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.main-nav {
  background: var(--secondary-bg);
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(20px);
  position: sticky;
  top: 0;
  z-index: 1000;
  transition: all 0.2s ease;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  gap: 24px;
  min-height: 72px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 24px;
  flex: 1;
}

.nav-center {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 0 0 auto;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: opacity 0.2s ease;
}

.logo:hover {
  opacity: 0.8;
}

.logo-icon {
  font-size: 24px;
}

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

.logo-title {
  font-weight: 700;
  color: var(--text-primary);
}

.logo-subtitle {
  font-size: 12px;
  font-weight: 400;
  color: var(--text-secondary);
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 14px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
  background: var(--elevated-bg);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.nav-link span {
  font-size: 16px;
  opacity: 0.8;
}

/* Professional Component Styles */

/* Main Content Layout */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
  min-height: calc(100vh - 72px);
}

.page-header {
  text-align: center;
  margin-bottom: 48px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 12px 0;
  letter-spacing: -0.02em;
}

.page-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
  font-weight: 400;
}

/* Cards and Surfaces */
.card {
  background: var(--surface-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-subtle);
  transition: all 0.2s ease;
  margin-bottom: 24px;
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-medium);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.card-content {
  color: var(--text-primary);
  line-height: 1.6;
}

/* Form Elements */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--tertiary-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  font-family: inherit;
  transition: all 0.2s ease;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
  background: var(--surface-bg);
}

.form-input::placeholder, .form-textarea::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  font-family: inherit;
  min-height: 44px;
  justify-content: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-hover) 100%);
  color: white;
  box-shadow: var(--shadow-subtle);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

.btn-secondary {
  background: var(--tertiary-bg);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--elevated-bg);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.btn-danger {
  background: var(--error-color);
  color: white;
}

.btn-success {
  background: var(--success-color);
  color: white;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn:active {
  transform: translateY(0);
}

/* Button Groups */
.button-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

/* Search Components */
.search-container {
  display: flex;
  gap: 12px;
  align-items: stretch;
  margin-bottom: 24px;
}

.search-input {
  flex: 1;
  padding: 12px 16px;
  background: var(--tertiary-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.2s ease;
}

.search-input:focus {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
  background: var(--surface-bg);
}

.search-button {
  padding: 12px 24px;
  background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-hover) 100%);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 100px;
}

.search-button:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-medium);
}

/* Loading States */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 32px;
  color: var(--text-secondary);
  font-size: 14px;
}

/* Beautiful Animated Loader */
.loader {
  width: 56px;
  height: 56px;
  position: relative;
  display: inline-block;
}

.box1,
.box2,
.box3 {
  border: 8px solid var(--accent-primary);
  box-sizing: border-box;
  position: absolute;
  display: block;
  border-radius: 2px;
}

.box1 {
  width: 56px;
  height: 24px;
  margin-top: 32px;
  margin-left: 0px;
  animation: abox1 4s 1s forwards ease-in-out infinite;
}

.box2 {
  width: 24px;
  height: 24px;
  margin-top: 0px;
  margin-left: 0px;
  animation: abox2 4s 1s forwards ease-in-out infinite;
}

.box3 {
  width: 24px;
  height: 24px;
  margin-top: 0px;
  margin-left: 32px;
  animation: abox3 4s 1s forwards ease-in-out infinite;
}

@keyframes abox1 {
  0% {
    width: 56px;
    height: 24px;
    margin-top: 32px;
    margin-left: 0px;
  }
  12.5% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 0px;
  }
  25% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 0px;
  }
  37.5% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 0px;
  }
  50% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 0px;
  }
  62.5% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 0px;
  }
  75% {
    width: 24px;
    height: 56px;
    margin-top: 0px;
    margin-left: 0px;
  }
  87.5% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 0px;
  }
  100% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 0px;
  }
}

@keyframes abox2 {
  0% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 0px;
  }
  12.5% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 0px;
  }
  25% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 0px;
  }
  37.5% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 0px;
  }
  50% {
    width: 56px;
    height: 24px;
    margin-top: 0px;
    margin-left: 0px;
  }
  62.5% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 32px;
  }
  75% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 32px;
  }
  87.5% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 32px;
  }
  100% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 32px;
  }
}

@keyframes abox3 {
  0% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 32px;
  }
  12.5% {
    width: 24px;
    height: 24px;
    margin-top: 0px;
    margin-left: 32px;
  }
  25% {
    width: 24px;
    height: 56px;
    margin-top: 0px;
    margin-left: 32px;
  }
  37.5% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 32px;
  }
  50% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 32px;
  }
  62.5% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 32px;
  }
  75% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 32px;
  }
  87.5% {
    width: 24px;
    height: 24px;
    margin-top: 32px;
    margin-left: 32px;
  }
  100% {
    width: 56px;
    height: 24px;
    margin-top: 32px;
    margin-left: 0px;
  }
}

/* Legacy spinner for backward compatibility */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border-color);
  border-top: 2px solid var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Messages */
.message {
  padding: 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  margin: 16px 0;
}

.message-success {
  background: rgba(48, 209, 88, 0.1);
  border: 1px solid var(--success-color);
  color: var(--success-color);
}

.message-error {
  background: rgba(255, 59, 48, 0.1);
  border: 1px solid var(--error-color);
  color: var(--error-color);
}

.message-warning {
  background: rgba(255, 159, 10, 0.1);
  border: 1px solid var(--warning-color);
  color: var(--warning-color);
}

.message-info {
  background: rgba(0, 122, 255, 0.1);
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--surface-bg);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: all 0.2s ease;
  box-shadow: var(--shadow-subtle);
  z-index: 1000;
}

.theme-toggle:hover {
  background: var(--elevated-bg);
  transform: scale(1.05);
  box-shadow: var(--shadow-medium);
}

/* Responsive Design */
@media (max-width: 768px) {
  .main-content {
    padding: 24px 16px;
  }
  
  .nav-container {
    padding: 12px 16px;
  }
  
  .page-title {
    font-size: 24px;
  }
  
  .card {
    padding: 20px;
  }
  
  .search-container {
    flex-direction: column;
  }
  
  .button-group {
    flex-direction: column;
    align-items: stretch;
  }
  
  .btn {
    justify-content: center;
  }
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
}

.logo-subtitle {
  font-size: 0.7rem;
  color: var(--text-color);
  opacity: 0.7;
  font-weight: 400;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.nav-link:hover::before {
  left: 100%;
}

.nav-link:hover {
  background: var(--primary-color);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(51,102,204,0.3);
}

.nav-link.active {
  background: var(--primary-color);
  color: white;
  box-shadow: 0 2px 8px rgba(51,102,204,0.3);
}

.nav-link span {
  font-size: 1.1rem;
  display: inline-block;
  transition: transform 0.3s ease;
}

.nav-link:hover span {
  transform: scale(1.1);
}

.theme-toggle {
  background: none;
  border: 2px solid var(--border-color);
  color: var(--text-color);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.theme-toggle::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--primary-color);
  opacity: 0;
  transition: opacity 0.3s ease;
  border-radius: 50%;
}

.theme-toggle:hover {
  border-color: var(--primary-color);
  transform: scale(1.1);
}

.theme-toggle:hover::before {
  opacity: 1;
}

.theme-toggle:hover {
  color: white;
}

.mobile-nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.mobile-nav-toggle:hover {
  background: var(--primary-color);
  color: white;
}

/* Mobile Navigation */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 9999;
  display: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-nav-overlay.open {
  display: flex;
  opacity: 1;
}

.mobile-nav-content {
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  margin-left: auto;
  height: 100%;
  width: 280px;
  padding: 20px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.mobile-nav-overlay.open .mobile-nav-content {
  transform: translateX(0);
}

.mobile-nav-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.mobile-nav-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
  padding: 8px;
  border-radius: 6px;
  transition: all 0.3s ease;
}

.mobile-nav-close:hover {
  background: var(--primary-color);
  color: white;
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mobile-nav-links .nav-link {
  padding: 16px 20px;
  border-radius: 8px;
  font-size: 1rem;
  justify-content: flex-start;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .nav-center {
    display: none;
  }
  
  .nav-left {
    gap: 15px;
  }
  
  .search-container {
    max-width: 350px;
  }
}

@media (max-width: 768px) {
  .nav-container {
    padding: 10px 0;
  }
  
  .nav-center,
  .nav-links {
    display: none;
  }
  
  .mobile-nav-toggle {
    display: block;
  }
  
  .logo {
    font-size: 1.5rem;
  }
  
  .logo-icon {
    font-size: 1.6rem;
  }
  
  .logo-title {
    font-size: 1.5rem;
  }
  
  .logo-subtitle {
    font-size: 0.6rem;
  }
  
  .search-container {
    max-width: 250px;
  }
  
  #searchInput {
    font-size: 0.9rem;
    padding: 8px 12px;
  }
  
  .search-button {
    padding: 8px 16px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .nav-container {
    padding: 8px 0;
    gap: 10px;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  .logo-text {
    display: none;
  }
  
  .logo-icon {
    font-size: 1.8rem;
  }
  
  .search-container {
    max-width: 200px;
  }
  
  #searchInput {
    font-size: 0.8rem;
    padding: 6px 10px;
  }
  
  .search-button {
    padding: 6px 12px;
    font-size: 0.8rem;
  }
  
  .theme-toggle {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }
}

.back-button {
  color: var(--text-color);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 4px;
  transition: background-color 0.3s ease;
  white-space: nowrap;
}

.back-button:hover {
  background-color: var(--primary-color);
  color: white;
}

.search-container {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 500px;
  position: relative;
}

.search-autocomplete-container {
  position: relative;
  flex: 1;
}

#searchInput {
  width: 100%;
  padding: 10px 16px;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  background: var(--input-bg);
  color: var(--text-color);
  transition: all 0.3s ease;
  outline: none;
}

#searchInput:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(51,102,204,0.1);
}

#searchSuggestions {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 4px 12px var(--shadow-color);
  list-style: none;
  padding: 0;
  margin: 4px 0 0 0;
  max-height: 300px;
  overflow-y: auto;
  z-index: 1001;
  display: none;
}

#searchSuggestions li {
  padding: 12px 16px;
  cursor: pointer;
  color: var(--text-color);
  transition: all 0.2s ease;
  border-bottom: 1px solid var(--border-color);
}

#searchSuggestions li:last-child {
  border-bottom: none;
}

#searchSuggestions li:hover {
  background: var(--primary-color);
  color: white;
}

.search-button {
  padding: 10px 20px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.search-button:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(51,102,204,0.3);
}

/* Main Layout */
.main-container {
  display: flex;
  max-width: 1200px;
  margin: 60px auto 0;
  padding: 20px;
  gap: 20px;
}

/* Sidebar */
.sidebar {
  width: 250px;
  background-color: var(--sidebar-bg);
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow-color);
  position: sticky;
  top: 60px;
}

.sidebar h3 {
  margin-top: 0;
  color: var(--text-color);
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar li {
  margin: 8px 0;
}

.sidebar a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* Main Content */
.content {
  flex: 1;
  background-color: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow-color);
}

.welcome-section {
  text-align: center;
  margin-bottom: 30px;
}

.welcome-section h1 {
  margin: 0;
  color: var(--text-color);
}

.subtitle {
  color: var(--text-color);
  opacity: 0.7;
  margin-bottom: 18px;
}

/* Featured Section */
.featured-section {
  margin-bottom: 30px;
}

.featured-section h2 {
  color: var(--text-color);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
}

.featured-section-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 12px 24px;
  margin-bottom: 32px;
}

@media (max-width: 900px) {
  .featured-section-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 12px 0;
  }
}

.featured-card {
  background: var(--card-bg);
  border-radius: 10px;
  box-shadow: 0 2px 8px var(--shadow-color);
  padding: 24px 20px 18px 20px;
  margin-bottom: 0;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  transition: box-shadow 0.2s;
}

/* Search Results */
.search-results {
  margin-top: 20px;
}

.result-item {
  background-color: var(--card-bg);
  padding: 15px;
  margin: 10px 0;
  border-left: 4px solid var(--primary-color);
  box-shadow: 0 0 5px var(--shadow-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.result-item:hover {
  transform: translateX(5px);
  box-shadow: 0 2px 8px var(--shadow-color);
}

.result-item a {
  color: var(--link-color);
  font-weight: bold;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* Theme Toggle */
.theme-toggle {
  padding: 8px;
  background: var(--primary-color);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.3s ease, background-color 0.3s ease;
}

.theme-toggle:hover {
  transform: scale(1.1);
  background-color: var(--primary-hover);
}

/* Scrolling Animations */
.content > * {
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.content > *.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Further Reading Section */
.further-reading {
  margin-top: 40px;
  padding: 20px;
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow-color);
}

.further-reading h2 {
  color: var(--text-color);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 10px;
  margin-bottom: 20px;
}

.recommendations-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.recommendation-card {
  background-color: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow-color);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.recommendation-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 4px 8px var(--shadow-color);
}

.recommendation-card h3 {
  color: var(--text-color);
  margin-top: 0;
  margin-bottom: 15px;
}

.recommendations-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.recommendation-item {
  padding: 10px;
  background-color: var(--bg-color);
  border-radius: 4px;
  transition: background-color 0.3s ease;
}

.recommendation-item:hover {
  background-color: var(--primary-color);
}

.recommendation-item a {
  color: var(--text-color);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.recommendation-item:hover a {
  color: white;
}

.recommendation-item .icon {
  width: 24px;
  height: 24px;
  background-color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.recommendation-item:hover .icon {
  background-color: white;
  color: var(--primary-color);
}

/* Progressive Disclosure */
.progressive-disclosure {
  margin: 20px 0;
}

.disclosure-section {
  margin-bottom: 20px;
  padding: 20px;
  background-color: var(--card-bg);
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow-color);
  transition: all 0.3s ease;
}

.disclosure-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  padding: 10px;
}

.disclosure-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.disclosure-content.expanded {
  max-height: 1000px;
}

.disclosure-icon {
  transition: transform 0.3s ease;
}

.disclosure-icon.expanded {
  transform: rotate(180deg);
}

/* Article Summarizer Styles */
.summarizer-section {
  background-color: var(--card-bg);
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 4px var(--shadow-color);
  margin-bottom: 30px;
}

.summarizer-container {
  display: flex;
  gap: 10px;
  margin: 20px 0;
}

.summarizer-input {
  flex: 1;
  padding: 12px;
  font-size: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: var(--input-bg);
  color: var(--text-color);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.summarizer-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
  outline: none;
}

.summarizer-button {
  padding: 12px 24px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: bold;
  display: flex;
  align-items: center;
  gap: 8px;
}

.summarizer-button::before {
  content: '✨';
}

.summarizer-button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

.summarizer-button:active {
  transform: translateY(0);
}

.article-content,
.article-summary {
  margin-top: 20px;
  padding: 20px;
  background-color: var(--bg-color);
  border-radius: 8px;
  border-left: 4px solid var(--primary-color);
  transition: all 0.3s ease;
  box-shadow: 0 2px 4px var(--shadow-color);
}

.article-content h3,
.article-summary h3 {
  color: var(--text-color);
  margin-top: 0;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.article-content h3::before {
  content: '📄';
}

.article-summary h3::before {
  content: '📝';
}

.article-content p,
.article-summary p {
  color: var(--text-color);
  line-height: 1.6;
  margin: 0;
}

/* Loading State */
.loading {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-color);
  padding: 15px;
  background-color: rgba(74, 144, 226, 0.1);
  border-radius: 4px;
  border-left: 4px solid #dc3545;
}

.loading::before {
  content: '⏳';
  font-size: 1.2em;
}

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

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

/* Error State */
.error-message {
  color: #dc3545;
  padding: 15px;
  background-color: rgba(220, 53, 69, 0.1);
  border-radius: 4px;
  margin-top: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-left: 4px solid #dc3545;
}

.error-message::before {
  content: '❌';
  font-size: 1.2em;
}

/* Summarizer Link in Nav */
.summarizer-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px; /* Adjusted padding for consistency */
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 500;
  transition: all 0.3s ease;
  font-size: 0.95rem; /* Slightly increased font size */
}

.summarizer-link:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

/* Back Button */
.back-button {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  color: var(--text-color);
  text-decoration: none;
  border-radius: 4px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.back-button:hover {
  color: var(--primary-color);
  transform: translateX(-2px);
}

/* Summarizer Page Specific Styles */
.summarizer-page {
  max-width: 800px;
  margin: 0 auto;
}

.summarizer-page .welcome-section {
  text-align: center;
  margin-bottom: 40px;
}

.summarizer-page .summarizer-section {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 6px var(--shadow-color);
}

/* Navigation Links */
.nav-links {
  display: flex;
  gap: 15px; /* Increased gap for better spacing between links */
  align-items: center; /* Ensure vertical alignment */
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background-color: var(--primary-color);
  color: white;
  text-decoration: none;
  border-radius: 4px;
  font-weight: 500;
  transition: all 0.3s ease;
  justify-content: center; /* Center-align text and icons */
}

.nav-link:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

.nav-right {
  display: flex;
  gap: 15px; /* Adjusted gap for better spacing */
  align-items: center; /* Ensure vertical alignment */
  margin-top: 0; /* Removed unnecessary margin */
  margin-left: 0; /* Removed unnecessary margin */
}

/* Responsive Design */
@media (max-width: 768px) {
  .main-container {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    position: static;
  }

  .nav-container {
    flex-direction: column;
    gap: 12px; /* Adjusted gap for better spacing on smaller screens */
  }

  .nav-left {
    flex-direction: column;
    width: 100%;
    margin-right: 30px;
  }

  .search-container {
    width: 100%;
  }

  #searchInput {
    width: 100%;
  }

  .recommendations-container {
    grid-template-columns: 1fr;
  }

  .disclosure-section {
    margin: 10px 0;
  }

  .summarizer-container {
    flex-direction: column;
  }

  .summarizer-button {
    width: 100%;
  }

  .nav-right {
    flex-direction: column;
    gap: 10px; /* Adjusted gap for better spacing */
  }

  .summarizer-link {
    padding: 6px 12px;
    font-size: 0.9rem;
  }

  .nav-links {
    flex-direction: column;
    width: 100%;
    gap: 10px; /* Adjusted gap for better spacing */
  }
  
  .nav-link {
    width: 100%;
    justify-content: center;
  }
}

/* Large Tablets and Small Desktops */
@media (max-width: 1024px) {
  .main-container {
    padding: 15px;
    gap: 15px;
  }
  
  .sidebar {
    width: 220px;
  }
  
  .featured-section-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  
  .recommendations-container {
    grid-template-columns: 1fr 1fr;
  }
}

/* Tablets */
@media (max-width: 768px) {
  /* Navigation */
  .nav-container {
    flex-direction: column;
    padding: 12px 16px;
    gap: 12px;
    align-items: stretch;
  }
  
  .nav-left {
    justify-content: center;
    flex-direction: column;
    gap: 10px;
  }
  
  .nav-right {
    justify-content: center;
  }
  
  .logo {
    font-size: 1.5rem;
    text-align: center;
  }
  
  .search-container {
    max-width: none;
    width: 100%;
  }
  
  .back-button {
    text-align: center;
    width: 100%;
  }
  
  /* Main Layout */
  .main-container {
    flex-direction: column;
    margin-top: 40px;
    padding: 10px;
    gap: 20px;
  }
  
  .sidebar {
    width: 100%;
    position: static;
    order: 2;
  }
  
  .content {
    order: 1;
    padding: 15px;
  }
  
  /* Cards and Sections */
  .featured-card {
    min-height: auto;
    padding: 20px 15px;
  }
  
  .recommendations-container {
    grid-template-columns: 1fr;
  }
  
  .recommendation-card {
    padding: 15px;
  }
  
  /* Typography */
  .welcome-section h1 {
    font-size: 2rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  /* Tables */
  table {
    font-size: 0.9rem;
  }
  
  th, td {
    padding: 8px;
  }
}

/* Mobile Phones */
@media (max-width: 480px) {
  /* Base Layout */
  body {
    font-size: 14px;
  }
  
  /* Navigation */
  .nav-container {
    padding: 10px 12px;
    gap: 10px;
  }
  
  .logo {
    font-size: 1.3rem;
  }
  
  .back-button {
    padding: 6px 10px;
    font-size: 0.9rem;
  }
  
  #searchInput {
    padding: 10px;
    font-size: 16px; /* Prevents zoom on iOS */
  }
  
  .search-button {
    padding: 10px 12px;
    font-size: 0.9rem;
  }
  
  /* Main Container */
  .main-container {
    padding: 8px;
    margin-top: 20px;
  }
  
  .content {
    padding: 12px;
  }
  
  /* Typography */
  .welcome-section h1 {
    font-size: 1.8rem;
    margin-bottom: 15px;
  }
  
  .subtitle {
    font-size: 0.95rem;
    margin-bottom: 15px;
  }
  
  h2 {
    font-size: 1.4rem;
  }
  
  h3 {
    font-size: 1.2rem;
  }
  
  p, li, span, label {
    font-size: 1rem;
    line-height: 1.5;
  }
  
  /* Cards */
  .featured-card {
    padding: 15px 12px;
    min-height: auto;
  }
  
  .recommendation-card {
    padding: 12px;
  }
  
  .result-item {
    padding: 12px;
    margin: 8px 0;
  }
  
  /* Forms and Inputs */
  input, select, textarea {
    padding: 12px;
    font-size: 16px; /* Prevents zoom on iOS */
  }
  
  button {
    padding: 12px 16px;
    font-size: 1rem;
  }
  
  /* Tables */
  table {
    font-size: 0.85rem;
    overflow-x: auto;
    display: block;
    white-space: nowrap;
  }
  
  thead, tbody, tr {
    display: table;
    width: 100%;
    table-layout: fixed;
  }
  
  th, td {
    padding: 6px;
    word-wrap: break-word;
  }
  
  /* Utility Classes */
  .hide-mobile {
    display: none !important;
  }
  
  .show-mobile {
    display: block !important;
  }
}

/* Quiz Page Responsive Styles */
@media (max-width: 768px) {
  .quiz-options {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
    padding: 15px !important;
  }
  
  .quiz-metadata {
    padding: 12px !important;
  }
  
  .quiz-metadata > div {
    grid-template-columns: 1fr !important;
    gap: 8px !important;
  }
  
  .quiz-actions {
    flex-direction: column !important;
    gap: 8px !important;
  }
  
  .quiz-actions button {
    width: 100% !important;
  }
  
  .quiz-mode-selector {
    flex-direction: column !important;
    gap: 8px !important;
    align-items: stretch !important;
  }
  
  .quiz-mode-selector button {
    width: 100%;
  }
  
  #quizNavigation {
    flex-direction: column !important;
    gap: 12px !important;
    text-align: center;
  }
  
  #quizNavigation button {
    width: 100%;
  }
  
  .option-container {
    margin-bottom: 8px !important;
  }
  
  .option-container label {
    padding: 12px !important;
    font-size: 1rem !important;
  }
}

/* Summarizer Page Responsive Styles */
@media (max-width: 768px) {
  .summary-options {
    padding: 12px !important;
  }
  
  .summary-options > div {
    grid-template-columns: 1fr !important;
    gap: 12px !important;
  }
  
  .summary-actions {
    flex-direction: column !important;
    gap: 8px !important;
  }
  
  .summary-actions .action-btn {
    width: 100% !important;
  }
  
  .summary-meta > div {
    grid-template-columns: 1fr !important;
    gap: 8px !important;
  }
}

/* Q&A Page Responsive Styles */
@media (max-width: 768px) {
  .qa-mode-selector {
    flex-direction: column !important;
    gap: 8px !important;
  }
  
  .qa-mode-selector button {
    width: 100%;
  }
  
  .qa-actions {
    flex-direction: column !important;
    gap: 8px !important;
  }
  
  .qa-actions button {
    width: 100% !important;
  }
  
  .article-selector {
    padding: 12px !important;
  }
}

/* Modal Responsive Styles */
@media (max-width: 768px) {
  #articleModal > div {
    width: 95vw !important;
    height: 85vh !important;
    max-width: none !important;
  }
  
  #articleModal button {
    top: 5px !important;
    right: 5px !important;
    width: 32px !important;
    height: 32px !important;
    font-size: 1.1rem !important;
  }
}

/* Suggestions and Autocomplete */
@media (max-width: 480px) {
  #suggestions, #wikiSuggestions {
    max-height: 200px !important;
    font-size: 0.9rem !important;
  }
  
  #suggestions li, #wikiSuggestions li {
    padding: 12px !important;
  }
}

/* Touch-friendly interactions */
@media (hover: none) and (pointer: coarse) {
  button, .action-btn, .quiz-generator-btn, .search-button {
    min-height: 44px;
    min-width: 44px;
  }
  
  .option-container label {
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  
  input[type="radio"], input[type="checkbox"] {
    min-width: 20px;
    min-height: 20px;
  }
}

/* Landscape orientation adjustments */
@media (max-width: 768px) and (orientation: landscape) {
  .main-container {
    margin-top: 10px;
  }
  
  .nav-container {
    flex-direction: row;
    padding: 8px 16px;
  }
  
  .nav-left {
    flex-direction: row;
    gap: 15px;
  }
  
  .search-container {
    max-width: 300px;
  }
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .logo {
    text-shadow: 0 1px 4px var(--shadow-color);
  }
  
  .featured-card, .recommendation-card, .result-item {
    box-shadow: 0 1px 4px var(--shadow-color);
  }
}

/* Accessibility improvements for mobile */
@media (max-width: 768px) {
  /* Larger tap targets */
  a, button, input, select, textarea {
    min-height: 44px;
  }
  
  /* Better contrast for small screens */
  .back-button:hover {
    background-color: var(--primary-color);
    color: white;
  }
  
  /* Improved readability */
  p, li {
    line-height: 1.6;
  }
  
  /* Better spacing */
  .featured-section {
    margin-bottom: 25px;
  }
  
  .further-reading {
    margin-top: 30px;
    padding: 15px;
  }
}

/* Print styles for mobile */
@media print {
  .main-nav, .sidebar, .theme-toggle, .search-container {
    display: none !important;
  }
  
  .main-container {
    margin: 0;
    padding: 0;
  }
  
  .content {
    box-shadow: none;
    border: none;
  }
}

/* --- Modern Glassy Card --- */
.card, .featured-card, .quiz-main-container, .qa-main-container, .random-article-card, .summarizer-section, .content {
  background: var(--card-bg);
  backdrop-filter: var(--card-blur);
  border-radius: 18px;
  box-shadow: var(--glass-shadow);
  border: var(--glass-border);
  padding: 28px 22px;
  margin-bottom: 28px;
  transition: box-shadow 0.3s, background 0.3s;
}
.card:hover, .featured-card:hover, .quiz-main-container:hover, .qa-main-container:hover, .random-article-card:hover, .summarizer-section:hover, .content:hover {
  box-shadow: 0 12px 32px 0 rgba(51,102,204,0.13);
  background: rgba(255,255,255,0.92);
}
[data-theme="dark"] .card:hover, [data-theme="dark"] .featured-card:hover, [data-theme="dark"] .quiz-main-container:hover, [data-theme="dark"] .qa-main-container:hover, [data-theme="dark"] .random-article-card:hover, [data-theme="dark"] .summarizer-section:hover, [data-theme="dark"] .content:hover {
  background: rgba(45,45,45,0.92);
}
/* --- Buttons & Inputs --- */
button, .quiz-btn, .send-btn, .search-btn, .summarizer-button, .random-article-button {
  font-family: var(--font-main);
  padding: 12px 28px;
  border-radius: 8px;
  border: none;
  background: linear-gradient(90deg, var(--primary-color) 60%, var(--primary-hover) 100%);
  color: #fff;
  font-weight: 600;
  font-size: 1.08rem;
  box-shadow: 0 2px 8px var(--shadow-color);
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s, transform 0.1s;
  outline: none;
  margin-bottom: 8px;
}
button:hover, .quiz-btn:hover, .send-btn:hover, .search-btn:hover, .summarizer-button:hover, .random-article-button:hover {
  background: linear-gradient(90deg, var(--primary-hover) 60%, var(--primary-color) 100%);
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 4px 16px var(--shadow-color);
}
input, select, .quiz-input, .quiz-select, .search-input, .question-input, .summarizer-input {
  font-family: var(--font-main);
  padding: 14px 16px;
  border-radius: 8px;
  border: 1.5px solid var(--border-color);
  background: var(--input-bg);
  color: var(--text-color);
  font-size: 1.08rem;
  margin-bottom: 10px;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
input:focus, select:focus, .quiz-input:focus, .quiz-select:focus, .search-input:focus, .question-input:focus, .summarizer-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(51,102,204,0.13);
}
/* --- Headings & Typography --- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-main);
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
p, li, span, label {
  font-family: var(--font-main);
  font-size: 1.08rem;
  color: var(--text-color);
}
/* --- Section Dividers --- */
.section-divider {
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-hover) 100%);
  opacity: 0.12;
  border-radius: 2px;
  margin: 32px 0 24px 0;
}
/* --- Responsive --- */
@media (max-width: 900px) {
  .main-nav, .nav-container { padding: 0 8px; }
  .card, .featured-card, .quiz-main-container, .qa-main-container, .random-article-card, .summarizer-section, .content { padding: 18px 6vw; }
}
@media (max-width: 600px) {
  .main-nav, .nav-container { flex-direction: column; gap: 8px; }
  .card, .featured-card, .quiz-main-container, .qa-main-container, .random-article-card, .summarizer-section, .content { padding: 12px 2vw; }
  h1 { font-size: 2rem; }
  h2 { font-size: 1.3rem; }
}

/* Table of Contents */
.toc-panel {
  background: var(--card-bg);
  backdrop-filter: var(--card-blur);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 24px;
  box-shadow: var(--glass-shadow);
  border: var(--glass-border);
  position: sticky;
  top: 80px;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
  transition: all 0.3s ease;
}

.toc-panel:hover {
  box-shadow: 0 12px 32px 0 rgba(51,102,204,0.13);
  background: rgba(255,255,255,0.92);
}

[data-theme="dark"] .toc-panel:hover {
  background: rgba(45,45,45,0.92);
}

.toc-panel h3 {
  color: var(--primary-color);
  margin: 0 0 16px 0;
  font-size: 1.2rem;
  font-weight: 600;
}

.toc-panel ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-panel li {
  margin-bottom: 8px;
  transition: transform 0.2s ease;
}

.toc-panel li:hover {
  transform: translateX(4px);
}

.toc-panel a {
  color: var(--text-color);
  text-decoration: none;
  font-size: 0.95rem;
  display: block;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.2s ease;
}

.toc-panel a:hover {
  color: var(--primary-color);
  background: rgba(51,102,204,0.1);
}

.toc-panel .active {
  color: var(--primary-color);
  background: rgba(51,102,204,0.15);
  font-weight: 500;
}

.toc-level-h3 { margin-left: 16px; }
.toc-level-h4 { margin-left: 32px; }
.toc-level-h5 { margin-left: 48px; }
.toc-level-h6 { margin-left: 64px; }

/* Enhanced Summary Content Styling */
.summary-content {
  line-height: 1.8 !important;
  white-space: pre-line !important;
  word-wrap: break-word !important;
  background: #fff !important;
  padding: 24px !important;
  border-radius: 12px !important;
  border: 1px solid #e0e0e0 !important;
  font-size: 16px !important;
  color: #333 !important;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif !important;
  max-width: none !important;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05) !important;
  transition: all 0.3s ease !important;
  text-align: left !important;
}

.summary-content:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.1) !important;
  transform: translateY(-1px) !important;
}

/* Dark mode styling for summary content */
[data-theme="dark"] .summary-content {
  background: #2d2d2d !important;
  color: #f5f5f5 !important;
  border-color: #444 !important;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3) !important;
}

[data-theme="dark"] .summary-content:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.5) !important;
}

/* Summary text formatting */
.summary-content h1, .summary-content h2, .summary-content h3 {
  color: var(--primary-color) !important;
  margin-top: 24px !important;
  margin-bottom: 12px !important;
  font-weight: 600 !important;
  border-bottom: 2px solid rgba(51,102,204,0.1) !important;
  padding-bottom: 8px !important;
  line-height: 1.4 !important;
}

.summary-content h1 { font-size: 1.5rem !important; }
.summary-content h2 { font-size: 1.3rem !important; }
.summary-content h3 { font-size: 1.1rem !important; }

.summary-content p {
  margin-bottom: 16px !important;
  text-align: justify !important;
  text-justify: inter-word !important;
  line-height: 1.7 !important;
}

.summary-content ul, .summary-content ol {
  margin: 16px 0 !important;
  padding-left: 24px !important;
  line-height: 1.6 !important;
}

.summary-content li {
  margin-bottom: 8px !important;
  line-height: 1.6 !important;
}

.summary-content strong {
  color: var(--primary-color) !important;
  font-weight: 600 !important;
}

.summary-content em {
  font-style: italic !important;
  color: #666 !important;
}

[data-theme="dark"] .summary-content em {
  color: #ccc !important;
}

/* Bullet point styling */
.summary-content ul li::marker {
  color: var(--primary-color) !important;
  font-size: 1.2em !important;
}

.summary-content ol li::marker {
  color: var(--primary-color) !important;
  font-weight: 600 !important;
}

/* Quote styling */
.summary-content blockquote {
  border-left: 4px solid var(--primary-color) !important;
  padding-left: 16px !important;
  margin: 16px 0 !important;
  font-style: italic !important;
  color: #666 !important;
  background: rgba(51,102,204,0.05) !important;
  border-radius: 4px !important;
}

[data-theme="dark"] .summary-content blockquote {
  color: #ccc !important;
  background: rgba(74,144,226,0.1) !important;
}

/* Code snippets */
.summary-content code {
  background: #f8f9fa !important;
  padding: 2px 6px !important;
  border-radius: 4px !important;
  font-family: 'Consolas', 'Monaco', monospace !important;
  font-size: 0.9em !important;
  color: #d73a49 !important;
}

[data-theme="dark"] .summary-content code {
  background: #2d2d2d !important;
  color: #f97583 !important;
}

/* Section dividers in summary */
.summary-content hr {
  border: none !important;
  height: 2px !important;
  background: linear-gradient(90deg, var(--primary-color), transparent) !important;
  margin: 24px 0 !important;
  border-radius: 1px !important;
}

/* Loading animation for summary */
.summary-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  background: var(--card-bg);
  border-radius: 12px;
  margin: 20px 0;
  font-size: 1.1rem;
  color: var(--text-color);
  gap: 12px;
}

.summary-loading::after {
  content: '';
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}