/* Reading List - Collapsible Sidebar Widget */
.reading-list {
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
  display: flex;
  align-items: flex-start;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Toggle tab - always visible on the left edge */
.reading-list-toggle {
  background: var(--theme, #FDFBF7);
  border: 1px solid var(--border, #E0DCD6);
  border-left: none;
  border-radius: 0 4px 4px 0;
  padding: 10px 6px;
  cursor: pointer;
  color: var(--secondary, #6B6B6B);
  transition: color 0.2s ease, background 0.2s ease;
  flex-shrink: 0;
}

.reading-list-toggle:hover {
  color: var(--primary, #1A1A1A);
  background: var(--border, #E0DCD6);
}

.dark .reading-list-toggle {
  background: var(--theme, #121212);
  border-color: var(--border, #2A2A2A);
  color: var(--secondary, #8A8A8A);
}

.dark .reading-list-toggle:hover {
  color: var(--primary, #E8E6E3);
  background: var(--border, #2A2A2A);
}

/* Bookmark icon via CSS */
.reading-list-icon {
  display: block;
  width: 14px;
  height: 18px;
  border: 2px solid currentColor;
  border-bottom: none;
  position: relative;
}

.reading-list-icon::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: -2px;
  right: -2px;
  height: 8px;
  border-left: 2px solid currentColor;
  border-right: 2px solid currentColor;
  clip-path: polygon(0 0, 50% 70%, 100% 0, 100% 100%, 0 100%);
  background: currentColor;
  clip-path: polygon(0 0, 50% 60%, 100% 0);
}

/* Switch to X icon when expanded */
.reading-list.expanded .reading-list-icon {
  width: 14px;
  height: 14px;
  border: none;
  position: relative;
}

.reading-list.expanded .reading-list-icon::before,
.reading-list.expanded .reading-list-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 2px;
  background: currentColor;
  border: none;
  clip-path: none;
}

.reading-list.expanded .reading-list-icon::before {
  transform: translate(-50%, -50%) rotate(45deg);
}

.reading-list.expanded .reading-list-icon::after {
  transform: translate(-50%, -50%) rotate(-45deg);
  bottom: auto;
  left: 50%;
  right: auto;
}

/* Panel - slides out to the right of the toggle */
.reading-list-panel {
  background: var(--theme, #FDFBF7);
  border: 1px solid var(--border, #E0DCD6);
  border-left: none;
  border-radius: 0 4px 4px 0;
  padding: 12px 14px;
  width: 200px;
  max-height: 80vh;
  overflow-y: auto;
  transform: translateX(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform 0.2s ease, opacity 0.2s ease, visibility 0.2s ease;
  position: absolute;
  left: 0;
  top: 0;
}

.dark .reading-list-panel {
  background: var(--theme, #121212);
  border-color: var(--border, #2A2A2A);
}

/* Expanded state - panel visible */
.reading-list.expanded .reading-list-panel {
  transform: translateX(0);
  opacity: 1;
  visibility: visible;
  left: 28px; /* right edge of toggle */
}

/* Title */
.reading-list-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary, #1A1A1A);
  margin-bottom: 8px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border, #E0DCD6);
}

.dark .reading-list-title {
  color: var(--primary, #E8E6E3);
  border-bottom-color: var(--border, #2A2A2A);
}

/* List items */
.reading-list-items {
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}

.reading-list-items li {
  margin: 6px 0;
  line-height: 1.45;
}

.reading-list-items a {
  color: var(--secondary, #6B6B6B);
  text-decoration: none;
  transition: color 0.2s ease;
}

.dark .reading-list-items a {
  color: var(--secondary, #8A8A8A);
}

.reading-list-items a:hover {
  color: var(--primary, #1A1A1A);
}

.dark .reading-list-items a:hover {
  color: var(--primary, #E8E6E3);
}

.reading-list-items a:focus-visible {
  outline: 2px solid var(--primary, #1A1A1A);
  outline-offset: 2px;
}

.dark .reading-list-items a:focus-visible {
  outline-color: var(--primary, #E8E6E3);
}

/* Hide on very small screens (mobile) */
@media (max-width: 768px) {
  .reading-list {
    display: none;
  }
}