/**
 * Reference Styles
 * Superscript markers, reference footer, and back links
 */

/* ===== INLINE REFERENCE MARKERS ===== */

.reference-marker {
    font-size: 0.75em;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
    top: -0.5em;
    margin-left: 1px;
  }
  
  .reference-link {
    color: var(--color-accent);
    text-decoration: none;
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 500;
    transition: color 200ms ease;
  }
  
  .reference-link:hover {
    color: var(--color-accent-hover, #3949AB);
    text-decoration: underline;
  }
  
  /* Dark mode */
  [data-theme="dark"] .reference-link {
    color: #6273F9;
  }
  
  [data-theme="dark"] .reference-link:hover {
    color: #7C8DFA;
  }
  
  /* ===== REFERENCES FOOTER ===== */
  
  .references-footer {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
  }
  
  .references-title {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 500;
    font-size: 14px;
    line-height: 22px;
    letter-spacing: 3.5px;
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
  }
  
  .references-list {
    list-style: none;
    padding-left: 0;
    margin: 0;
  }
  
  .reference-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    scroll-margin-top: 100px;
  }
  
  .reference-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
  }
  
  .reference-number {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 600;
    font-size: 14px;
    color: var(--color-accent);
    min-width: 24px;
    flex-shrink: 0;
  }
  
  /* Dark mode */
  [data-theme="dark"] .reference-number {
    color: #6273F9;
  }
  
  .reference-content {
    flex: 1;
    font-family: 'IBM Plex Serif', serif;
    font-size: 16px;
    line-height: 24px;
    color: var(--color-text-secondary);
  }
  
  .reference-content p {
    margin: 0 0 var(--spacing-sm) 0;
  }
  
  .reference-content p:last-child {
    margin-bottom: 0;
  }
  
  .reference-content a {
    color: var(--color-accent);
    text-decoration: underline;
    word-break: break-word;
  }
  
  .reference-content a:hover {
    color: var(--color-accent-hover, #3949AB);
  }
  
  /* Dark mode */
  [data-theme="dark"] .reference-content {
    color: var(--color-text-secondary);
  }
  
  [data-theme="dark"] .reference-content a {
    color: #6273F9;
  }
  
  [data-theme="dark"] .reference-content a:hover {
    color: #7C8DFA;
  }
  
  /* ===== BACK LINK ===== */
  
  .reference-back {
    font-size: 18px;
    color: var(--color-accent);
    text-decoration: none;
    flex-shrink: 0;
    padding: var(--spacing-xs);
    border-radius: 4px;
    transition: background-color 200ms ease, color 200ms ease;
    line-height: 1;
  }
  
  .reference-back:hover {
    background-color: rgba(80, 99, 249, 0.1);
    color: var(--color-accent-hover, #3949AB);
  }
  
  /* Dark mode */
  [data-theme="dark"] .reference-back {
    color: #6273F9;
  }
  
  [data-theme="dark"] .reference-back:hover {
    background-color: rgba(98, 115, 249, 0.15);
    color: #7C8DFA;
  }
  
  /* ===== HIGHLIGHT ON TARGET ===== */
  
  .reference-item:target {
    animation: highlightRef 2s ease;
  }
  
  @keyframes highlightRef {
    0% {
      background-color: rgba(80, 99, 249, 0.2);
    }
    100% {
      background-color: transparent;
    }
  }
  
  [data-theme="dark"] .reference-item:target {
    animation: highlightRefDark 2s ease;
  }
  
  @keyframes highlightRefDark {
    0% {
      background-color: rgba(98, 115, 249, 0.25);
    }
    100% {
      background-color: transparent;
    }
  }
  
  /* Highlight source marker when returning */
  .reference-marker:target .reference-link {
    animation: highlightSource 2s ease;
  }
  
  @keyframes highlightSource {
    0% {
      background-color: rgba(80, 99, 249, 0.3);
      border-radius: 2px;
    }
    100% {
      background-color: transparent;
    }
  }
  
  /* ===== RESPONSIVE ===== */
  
  @media (max-width: 767px) {
    .references-footer {
      margin-top: var(--spacing-2xl);
      padding-top: var(--spacing-lg);
    }
  
    .reference-item {
      gap: var(--spacing-sm);
    }
  
    .reference-content {
      font-size: 15px;
      line-height: 22px;
    }
  }