frontend/styles.css

/* CSS Variables for Theme Switching */
:root {
  /* Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;
  --accent-primary: #3b82f6;
  --accent-secondary: #06b6d4;
  --accent-success: #10b981;
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  --accent-info: #3b82f6;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

[data-theme="dark"] {
  /* Dark Theme */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-light: #334155;
  --border-medium: #475569;
  --accent-primary: #60a5fa;
  --accent-secondary: #22d3ee;
  --accent-success: #34d399;
  --accent-warning: #fbbf24;
  --accent-danger: #f87171;
  --accent-info: #60a5fa;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Navigation Bar */
.navbar {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-left .logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo i {
  color: var(--accent-primary);
  font-size: 24px;
}

.nav-center {
  flex: 1;
  max-width: 600px;
  margin: 0 48px;
}

.search-container {
  position: relative;
  width: 100%;
}

.search-input {
  width: 100%;
  padding: 12px 48px;
  border: 1px solid var(--border-medium);
  border-radius: 12px;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 14px;
  transition: all 0.2s ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
}

.search-magic {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-secondary);
  font-size: 14px;
  cursor: pointer;
}

.theme-toggle {
  background: none;
  border: none;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  position: relative;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.theme-toggle .light-icon {
  display: block;
}

.theme-toggle .dark-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .light-icon {
  display: none;
}

[data-theme="dark"] .theme-toggle .dark-icon {
  display: block;
}

/* Main Header */
.main-header {
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  padding: 32px 0;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 32px;
  align-items: center;
}

.header-left h1 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.subtitle {
  color: var(--text-secondary);
  font-size: 16px;
}

.ai-search-container {
  position: relative;
  width: 100%;
}

.ai-search-input {
  width: 100%;
  padding: 16px 48px;
  border: 1px solid var(--border-medium);
  border-radius: 16px;
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  font-size: 16px;
  transition: all 0.2s ease;
}

.ai-search-input:focus {
  outline: none;
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.ai-search-container i:first-child {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-secondary);
  font-size: 16px;
}

.ai-search-container i:last-child {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 16px;
}

.header-right {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: flex-end;
}

.filter-buttons {
  display: flex;
  gap: 8px;
}

.filter-btn {
  padding: 8px 16px;
  border: 1px solid var(--border-medium);
  border-radius: 8px;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

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

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

.star-btn {
  padding: 8px;
  color: var(--accent-warning);
}

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

.nav-btn {
  background: none;
  border: 1px solid var(--border-medium);
  border-radius: 8px;
  padding: 8px 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

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

.date-display {
  font-weight: 600;
  color: var(--text-primary);
  min-width: 80px;
  text-align: center;
}

/* Main Content */
.main-content {
  background-color: var(--bg-secondary);
  min-height: calc(100vh - 200px);
  padding: 32px 0;
}

.content-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 24px;
  align-items: stretch;
}

/* Hugging Face Style Paper Cards */
.hf-paper-card {
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--border-light);
  background-color: var(--bg-primary);
  transition: all 0.2s ease;
  height: 100%;
}

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

/* Paper Thumbnail */
.paper-thumbnail-link {
  position: relative;
  display: block;
  height: 224px;
  width: 100%;
  cursor: pointer;
  overflow: hidden;
  border-radius: 12px;
  background-color: var(--bg-secondary);
}

.paper-thumbnail-img {
  height: 100%;
  width: 100%;
  object-fit: cover;
  object-position: top;
  opacity: 0.8;
  transition: opacity 0.2s ease;
}

[data-theme="dark"] .paper-thumbnail-img {
  opacity: 0.7;
  filter: invert(1);
}

.paper-thumbnail-link:hover .paper-thumbnail-img {
  opacity: 1;
}

/* Submitted by badge */
.submitted-by-badge {
  position: absolute;
  right: 8px;
  top: 216px;
  margin-top: -32px;
  display: flex;
  height: 24px;
  align-items: center;
  gap: 4px;
  align-self: flex-end;
  white-space: nowrap;
  border-radius: 6px;
  border: 1px solid var(--border-light);
  background-color: var(--bg-primary);
  padding: 0 8px;
  font-size: 12px;
  line-height: 1;
  color: var(--text-secondary);
}

/* Score badge */
.score-badge {
  position: absolute;
  right: 16px;
  bottom: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  padding: 8px 12px;
  min-width: 60px;
  box-shadow: var(--shadow-lg);
  z-index: 20;
  transition: all 0.2s ease;
  cursor: pointer;
}

.score-badge:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.score-badge .score-number {
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 2px;
}

.score-badge .score-label {
  font-size: 10px;
  font-weight: 600;
  opacity: 0.9;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.submitter-avatar-img {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.submitter-avatar-placeholder {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-right: 8px;
}

.submitter-avatar-placeholder i {
  font-size: 10px;
  color: white;
}

/* Card Content */
.card-content {
  background: linear-gradient(to bottom, var(--bg-secondary), var(--bg-primary));
  margin-top: -8px;
  display: flex;
  padding: 32px 24px 24px 24px;
  gap: 24px;
  flex: 1;
}

/* Upvote Section */
.upvote-section {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: 4px;
  z-index: 1;
}

.upvote-button {
  display: flex;
  height: 56px;
  width: 48px;
  gap: 4px;
  border-radius: 12px;
  flex-shrink: 0;
  cursor: pointer;
  user-select: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  align-self: flex-start;
  border: 1px solid var(--border-medium);
  background-color: var(--bg-primary);
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.upvote-button:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-md);
}

.upvote-checkbox {
  display: none;
}

.upvote-checkbox:checked + .upvote-icon {
  color: var(--accent-primary);
}

.upvote-icon {
  font-size: 14px;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.upvote-count {
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  color: var(--text-primary);
}

/* Paper Info */
.paper-info {
  width: 100%;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.paper-title {
  margin-bottom: 4px;
  font-size: 18px;
  line-height: 1.5;
  font-weight: 600;
}

.title-link {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  cursor: pointer;
  text-decoration: none;
  color: var(--text-primary);
  transition: color 0.2s ease;
}

.title-link:hover {
  text-decoration: underline;
}

/* Paper Meta */
.paper-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: auto;
}

.authors-section {
  display: flex;
  align-items: center;
}

.authors-link {
  display: flex;
  text-decoration: none;
  color: inherit;
}

.author-avatars-list {
  display: flex;
  align-items: center;
  flex-direction: row-reverse;
  font-size: 14px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.author-avatars-list li {
  margin-right: -8px;
  height: 16px;
  width: 16px;
  background: linear-gradient(to bottom right, var(--bg-tertiary), var(--bg-secondary));
  display: block;
  flex-shrink: 0;
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
}

@media (min-width: 768px) {
  .author-avatars-list li {
    height: 20px;
    width: 20px;
  }
}

.author-count {
  margin-left: 12px;
  color: var(--text-muted);
  font-size: 14px;
}

/* Engagement Metrics */
.engagement-metrics {
  display: flex;
  align-items: center;
  gap: 8px;
}

.metric-link {
  display: flex;
  align-items: center;
  gap: 4px;
  border-radius: 6px;
  border: 1px solid var(--border-light);
  padding: 2px 4px;
  font-size: 12px;
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.2s ease;
}

@media (min-width: 640px) {
  .metric-link {
    padding: 4px 8px;
    font-size: 14px;
  }
}

.metric-link:hover {
  border-color: var(--border-medium);
  color: var(--text-primary);
}

.github-icon {
  width: 12px;
  height: 12px;
  color: var(--text-primary);
}

.comment-icon {
  width: 14px;
  height: 14px;
  color: var(--text-primary);
}

/* Card Actions */
.card-actions {
  padding: 0 24px 24px 24px;
  display: flex;
  gap: 8px;
  margin-top: auto;
}

.eval-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border-medium);
  border-radius: 8px;
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 100px;
  justify-content: center;
}

.eval-button:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.eval-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Evaluate state (green) */
.eval-button.evaluate-state {
  color: var(--accent-success);
  border-color: var(--accent-success);
}

.eval-button.evaluate-state:hover {
  background-color: var(--accent-success);
  color: white;
}

/* Evaluation state (blue) */
.eval-button.evaluation-state {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.eval-button.evaluation-state:hover {
  background-color: var(--accent-primary);
  color: white;
}

/* Evaluating state (orange) */
.eval-button.evaluating-state {
  color: var(--accent-warning);
  border-color: var(--accent-warning);
  position: relative;
}

.eval-button.evaluating-state::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 8px;
  width: 12px;
  height: 12px;
  border: 2px solid transparent;
  border-top: 2px solid var(--accent-warning);
  border-radius: 50%;
  transform: translateY(-50%);
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: translateY(-50%) rotate(0deg); }
  100% { transform: translateY(-50%) rotate(360deg); }
}

/* Started state (green) */
.eval-button.started-state {
  color: var(--accent-success);
  border-color: var(--accent-success);
  position: relative;
}

.eval-button.started-state::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 8px;
  width: 8px;
  height: 8px;
  background-color: var(--accent-success);
  border-radius: 50%;
  transform: translateY(-50%);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0% {
    opacity: 1;
    transform: translateY(-50%) scale(1);
  }
  50% {
    opacity: 0.5;
    transform: translateY(-50%) scale(1.2);
  }
  100% {
    opacity: 1;
    transform: translateY(-50%) scale(1);
  }
}

/* Processing state (blue) */
.eval-button.processing-state {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  position: relative;
}

.eval-button.processing-state::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 8px;
  width: 10px;
  height: 10px;
  background-color: var(--accent-primary);
  border-radius: 50%;
  transform: translateY(-50%);
  animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(-50%) scale(1);
  }
  40% {
    transform: translateY(-50%) scale(1.1);
  }
  60% {
    transform: translateY(-50%) scale(0.9);
  }
}

/* Error state (red) */
.eval-button.error-state {
  color: var(--accent-danger);
  border-color: var(--accent-danger);
}

/* Timeout state (gray) */
.eval-button.timeout-state {
  color: var(--text-muted);
  border-color: var(--text-muted);
}

/* Spinner animation */
.eval-button .fa-spinner {
  animation: spin 1s linear infinite;
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-tertiary);
  color: var(--accent-warning);
  border: 1px solid var(--border-medium);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
}

/* Loading Animation */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

[data-theme="dark"] .loading-overlay {
  background-color: rgba(15, 23, 42, 0.8);
}

.loading-overlay.show {
  opacity: 1;
  visibility: visible;
}

.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--border-light);
  border-top: 4px solid var(--accent-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.loading-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  text-align: center;
}

.loading-subtext {
  font-size: 14px;
  color: var(--text-secondary);
  text-align: center;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .header-container {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .header-right {
    align-items: flex-start;
  }
  
  .cards-grid {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    align-items: stretch;
  }
}

@media (max-width: 768px) {
  .nav-container {
    padding: 0 16px;
  }
  
  .nav-center {
    margin: 0 16px;
  }
  
  .header-container {
    padding: 0 16px;
  }
  
  .content-container {
    padding: 0 16px;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
    align-items: stretch;
  }
  
  .paper-card {
    padding: 20px;
  }
  
  .filter-buttons {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .nav-left .logo span {
    display: none;
  }
  
  .nav-center {
    margin: 0 8px;
  }
  
  .paper-card {
    padding: 16px;
  }
  
  .card-header {
    flex-direction: column;
    gap: 12px;
  }
  
  .upvote-section {
    flex-direction: row;
    justify-content: center;
  }
}

/* Paper Evaluation Page Styles */
.back-link {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: all 0.2s ease;
}

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

.page-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.page-title i {
  color: var(--accent-primary);
}

.paper-main {
  background-color: var(--bg-secondary);
  min-height: calc(100vh - 64px);
  padding: 32px 0;
}

.paper-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
}

.paper-header {
  background: linear-gradient(135deg, 
    var(--bg-primary) 0%, 
    var(--bg-secondary) 50%, 
    var(--bg-tertiary) 100%);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  padding: 40px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.paper-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, 
    var(--accent-primary) 0%, 
    var(--accent-secondary) 50%, 
    var(--accent-success) 100%);
}

.paper-header::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, 
    rgba(59, 130, 246, 0.03) 0%, 
    rgba(6, 182, 212, 0.02) 50%, 
    transparent 100%);
  pointer-events: none;
}

.paper-meta h1 {
  font-size: 32px;
  font-weight: 900;
  background: linear-gradient(135deg, 
    var(--text-primary) 0%, 
    var(--accent-primary) 50%, 
    var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
  letter-spacing: -0.5px;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  position: relative;
  z-index: 1;
}

.meta-item {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .meta-item {
  background: rgba(30, 41, 59, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.meta-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-primary);
}

.meta-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.meta-label i {
  color: var(--accent-primary);
  font-size: 12px;
}

.meta-value {
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.4;
}

.meta-value a {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(59, 130, 246, 0.1);
  display: inline-block;
}

.meta-value a:hover {
  background: rgba(59, 130, 246, 0.2);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.content-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
  align-items: start;
}

.main-content {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

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

.evaluation-content section {
  margin-bottom: 32px;
}

.evaluation-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border-light);
}

.evaluation-content h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 24px 0 12px 0;
}

.evaluation-content p {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.evaluation-content ul {
  list-style: none;
  padding: 0;
  margin: 16px 0;
}

.evaluation-content li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  position: relative;
  padding-left: 20px;
}

.evaluation-content li:before {
  content: '•';
  color: var(--accent-primary);
  font-weight: bold;
  position: absolute;
  left: 0;
}

.dimension-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  transition: all 0.2s ease;
}

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

.dimension-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.dimension-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

.dimension-score {
  display: flex;
  align-items: center;
  gap: 8px;
}

.score-badge {
  background-color: var(--accent-primary);
  color: white;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
}

.dimension-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 14px;
  color: var(--text-muted);
}

.dimension-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.dimension-analysis {
  color: var(--text-secondary);
  line-height: 1.5;
}

.sidebar {
  position: sticky;
  top: 100px;
}

.scorecard-panel {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.panel-header h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.overall-score {
  text-align: center;
}

.score-number {
  display: block;
  font-size: 24px;
  font-weight: 800;
  color: var(--accent-primary);
}

.score-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.radar-container {
  display: flex;
  justify-content: center;
  margin-bottom: 20px;
}

.radar-legend h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
}

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

.legend-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 12px;
  color: var(--text-secondary);
}

.legend-color {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  flex-shrink: 0;
}

.legend-abbr {
  font-weight: 600;
  min-width: 40px;
  text-align: center;
}

.legend-full {
  color: var(--text-secondary);
  font-size: 11px;
}

/* Responsive Design for Paper Page */
@media (max-width: 1024px) {
  .content-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .sidebar {
    position: static;
  }
  
  .scorecard-panel {
    order: -1;
  }
}

@media (max-width: 768px) {
  .paper-container {
    padding: 0 16px;
  }
  
  .paper-header {
    padding: 24px;
  }
  
  .main-content {
    padding: 24px;
  }
  
  .meta-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .paper-header {
    padding: 20px;
  }
  
  .main-content {
    padding: 20px;
  }
  
  .scorecard-panel {
    padding: 20px;
  }
  
  .dimension-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* Enhanced Evaluation Page Styles */
.evaluation-section {
  margin-bottom: 48px;
  background: var(--bg-primary);
  border-radius: 12px;
  border: 1px solid var(--border-light);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.section-header {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: white;
  padding: 24px 32px;
  border-bottom: 1px solid var(--border-light);
}

.section-header h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-header h2 i {
  font-size: 20px;
  opacity: 0.9;
}

.section-content {
  padding: 32px;
}

/* Summary Card */
.summary-card {
  background: var(--bg-secondary);
  border-radius: 8px;
  padding: 24px;
  border-left: 4px solid var(--accent-primary);
}

.summary-text {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  margin: 0;
}

/* Dimensions Grid */
.dimensions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 24px;
}

.dimension-card {
  background: var(--bg-secondary);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--border-light);
  transition: all 0.2s ease;
}

.dimension-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-primary);
}

.dimension-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.dimension-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
}

.dimension-title i {
  color: var(--accent-primary);
  font-size: 16px;
}

.dimension-score {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.score-badge {
  background: var(--accent-primary);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  min-width: 32px;
  text-align: center;
}

.score-badge.probability {
  background: var(--accent-secondary);
}

.dimension-meta {
  margin-bottom: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.meta-item {
  background: var(--bg-tertiary);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.dimension-analysis {
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 14px;
}

/* Recommendations Grid */
.recommendations-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.recommendation-card {
  background: var(--bg-secondary);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--border-light);
  transition: all 0.2s ease;
}

.recommendation-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent-secondary);
}

.recommendation-card h3 {
  color: var(--accent-secondary);
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 16px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

.recommendation-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
  position: relative;
  padding-left: 20px;
}

.recommendation-list li:before {
  content: "→";
  color: var(--accent-secondary);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.recommendation-list li:last-child {
  border-bottom: none;
}

/* Limitations Card */
.limitations-card {
  background: var(--bg-secondary);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--border-light);
  border-left: 4px solid var(--accent-warning);
}

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

.limitations-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
  position: relative;
  padding-left: 24px;
}

.limitations-list li:before {
  content: "⚠";
  color: var(--accent-warning);
  position: absolute;
  left: 0;
  font-weight: bold;
}

.limitations-list li:last-child {
  border-bottom: none;
}

/* No Data Styling */
.no-data {
  color: var(--text-muted);
  font-style: italic;
  text-align: center;
  padding: 24px;
  background: var(--bg-tertiary);
  border-radius: 8px;
  border: 2px dashed var(--border-medium);
}

/* Radar Chart Tooltip */
.radar-tooltip {
  position: fixed;
  display: none;
  z-index: 1000;
  pointer-events: none;
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  padding: 8px 12px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(8px);
  animation: tooltip-fade-in 0.2s ease-out;
}

.tooltip-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tooltip-abbr {
  font-weight: 700;
  font-size: 14px;
  line-height: 1;
}

.tooltip-full {
  font-size: 11px;
  color: var(--text-secondary);
  line-height: 1;
}

@keyframes tooltip-fade-in {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design for Paper Header */
@media (max-width: 768px) {
  .paper-header {
    padding: 24px;
    margin-bottom: 24px;
    border-radius: 16px;
  }
  
  .paper-meta h1 {
    font-size: 24px;
    margin-bottom: 24px;
  }
  
  .meta-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .meta-item {
    padding: 12px;
  }
  
  .meta-value {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  .paper-header {
    padding: 20px;
    margin-bottom: 20px;
  }
  
  .paper-meta h1 {
    font-size: 20px;
    margin-bottom: 20px;
  }
  
  .meta-item {
    padding: 10px;
  }
  
  .meta-label {
    font-size: 10px;
  }
  
  .meta-value {
    font-size: 13px;
  }
}