/* ========================================
   READING PANE TABS - Pill Style
   WorkPilot v5.2.0
   
   NEW DESIGN:
   - Pill-shaped tabs with icons + labels
   - Monochrome with clear active/inactive states
   - Status indicators (running, complete, error)
   - Horizontal scroll when tabs overflow
   ======================================== */

/* ----------------------------------------
   TAB BAR CONTAINER
   ---------------------------------------- */

.reading-tabs {
  display: flex;
  align-items: center;
  padding: var(--tab-bar-padding, 4px 12px);
  background: var(--color-surface-secondary, #f1f5f9);
  border-bottom: 1px solid var(--color-border, #e2e8f0);
  min-height: var(--tab-bar-height, 36px);
  position: relative;
  flex-shrink: 0;
  overflow: hidden;
}

.reading-tabs:not(.reading-tabs--navbar)[data-visible="false"] {
  display: none;
}

/* Tab list wrapper - THIS is the scrollable element */
.reading-tabs__list {
  display: flex;
  align-items: center;
  /* gap: var(--tab-gap, 6px); */
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none; /* Firefox */
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}

.reading-tabs__list::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

/* Fade indicators for overflow */
.reading-tabs__fade {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 32px;
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  transition: opacity var(--transition-fast, 150ms);
}

.reading-tabs__fade--left {
  left: 0;
  background: linear-gradient(to right, var(--color-surface-secondary, #f1f5f9), transparent);
}

.reading-tabs__fade--right {
  right: 0;
  background: linear-gradient(to left, var(--color-surface-secondary, #f1f5f9), transparent);
}

.reading-tabs[data-scroll-left="true"] .reading-tabs__fade--left,
.reading-tabs[data-scroll-right="true"] .reading-tabs__fade--right {
  opacity: 1;
}

/* ----------------------------------------
   INDIVIDUAL TAB (Pill Style)
   ---------------------------------------- */

.reading-tab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--tab-padding, 5px 12px);
  border-bottom: 2px solid transparent;
  /* background: var(--tab-bg, transparent); */
  color: var(--tab-text, var(--color-text-secondary));
  font-family: inherit;
  font-size: var(--tab-font-size, 11px);
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-fast, 150ms);
  position: relative;
  flex-shrink: 0;
}

.reading-tab:hover {
  /* background: var(--tab-bg-hover, var(--color-surface-secondary)); */
  color: var(--tab-text-hover, var(--color-text));
}

.reading-tab:focus {
  outline: none;
}

.reading-tab:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Active tab (light-blue pill) */
.reading-tab.is-active {
  /* background: var(--tab-bg-active, #DBEAFE); */
  color: black;
  border-color: var(--tag-blue-fg, #0d53a8);
}

.reading-tab.is-active:hover {
  /* background: #bfdcff; */
  color: var(--tag-blue-fg, #0d53a8);
}

/* Icon slot: fixed size so icon/drag swap doesn’t change tab width */
.reading-tab__icon-slot {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.reading-tab__icon-slot .reading-tab__icon,
.reading-tab__icon-slot .reading-tab__drag {
  position: absolute;
  left: 0;
  top: 0;
  width: 14px;
  height: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.reading-tab__icon-slot .reading-tab__icon {
  font-size: var(--tab-icon-size, 12px);
  line-height: 1;
}

/* Drag handle (6-dots): replace icon on hover – same slot, no layout shift (not for fixed Email tab) */
.reading-tab__icon-slot .reading-tab__drag {
  opacity: 0;
  pointer-events: none;
}

.reading-tab:hover:not(.reading-tab--thread) .reading-tab__icon-slot .reading-tab__icon {
  opacity: 0;
}

.reading-tab:hover:not(.reading-tab--thread) .reading-tab__icon-slot .reading-tab__drag {
  opacity: 1;
}

.reading-tab__drag-svg {
  width: 14px;
  height: 14px;
  color: var(--tab-text, var(--color-text-secondary));
}

.reading-tab:hover .reading-tab__drag-svg {
  color: inherit;
}

.reading-tab--dragging {
  opacity: 0.6;
  cursor: grabbing;
}

.reading-tab--drop-target {
  border-left: 1px solid var(--tag-blue-fg, #0d53a8);
}

/* Tab label */
.reading-tab__label {
  font-size: var(--tab-font-size, 11px);
  line-height: 1;
}

/* Status badge (after icon) */
.reading-tab__badge {
  margin-left: 2px;
  font-size: 11px;
  line-height: 1;
}

/* Close button — inside the pill, visible on hover */
.reading-tab__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  margin-left: -3px;
  margin-right: -4px;
  padding: 0;
  background: none;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  color: inherit;
  opacity: 0;
  transition: opacity var(--transition-fast), background var(--transition-fast);
  font-size: 9px;
  line-height: 1;
  flex-shrink: 0;
}

.reading-tab:hover .reading-tab__close {
  opacity: 0.5;
}

.reading-tab__close:hover {
  opacity: 1 !important;
  background: rgba(0, 0, 0, 0.1);
}

.reading-tab.is-active .reading-tab__close:hover {
  background: rgba(37, 99, 235, 0.15);
}

/* Original/Compose tabs cannot be closed */
.reading-tab--original .reading-tab__close,
.reading-tab--compose .reading-tab__close {
  display: none;
}

/* ----------------------------------------
   TAB STATUS INDICATORS
   ---------------------------------------- */

/* Running state - pulse animation */
.reading-tab--running .reading-tab__icon {
  animation: tab-pulse 1.5s ease-in-out infinite;
}

@keyframes tab-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Complete state - green checkmark badge */
.reading-tab--complete .reading-tab__badge::after {
  content: '✓';
  color: var(--tab-complete-badge, var(--color-success));
  margin-left: 4px;
}

.reading-tab.is-active.reading-tab--complete .reading-tab__badge::after {
  color: var(--color-success);
}

/* Error state - red border */
.reading-tab--error {
  border-color: var(--tab-error-badge, var(--color-error));
}

.reading-tab--error .reading-tab__badge::after {
  content: '!';
  color: var(--tab-error-badge, var(--color-error));
  font-weight: 700;
  margin-left: 4px;
}

/* ----------------------------------------
   NAVBAR VARIANT (tabs in the header bar)
   ---------------------------------------- */

.reading-tabs--navbar {
  background: transparent;
  border-bottom: none;
  padding: 0;
  min-height: auto;
  overflow: visible;
  flex: 1;
  min-width: 0;
}

.reading-tabs--navbar .reading-tabs__list {
  overflow-x: hidden;
  flex: 0 1 auto;
  min-width: 0;
}

.reading-tabs--navbar .reading-tab {
  padding: 10px;
  font-size: 12px;
  font-weight: 600;
}

.reading-tabs--navbar .reading-tab__label {
  font-size: 12px;
}

.reading-tabs--navbar .reading-tab__icon {
  font-size: 11px;
}

/* Email/thread tab: match size of action tabs (no close button, so add padding) */
.reading-tabs--navbar .reading-tab--thread {
  min-height: 36px;
  padding-left: 10px;
  padding-right: 22px;
  border-right: 1px solid var(--color-border, #e8e8e8);
}

/* Navbar overflow: More button and dropdown */
.reading-tabs__overflow {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  position: relative;
}

.reading-tabs__overflow[hidden] {
  display: none;
}

.reading-tabs__more-btn {
  display: inline-flex;
  align-items: center;
  padding: 8px 10px;
  border: none;
  color: var(--tab-text, var(--color-text-secondary));
  background-color: var(--tag-blue-bg, #cfe7ff);
  font-family: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  border-radius: 6px;
  white-space: nowrap;
  transition: background var(--transition-fast, 150ms), color var(--transition-fast, 150ms);
}

.reading-tabs__more-btn:hover {
  background: var(--tab-bg-hover, var(--color-surface-secondary));
  color: var(--tab-text-hover, var(--color-text));
}

.reading-tabs__more-btn.is-open {
  background: var(--tab-bg-hover, var(--color-surface-secondary));
  color: var(--tab-text-active, #2563EB);
}

.reading-tabs__more-btn .reading-tabs__more-count {
  display: inline-block;
  min-width: 1.25em;
  margin: 0 2px;
  padding: 1px 4px;
  font-size: 11px;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  background: var(--color-border, #e2e8f0);
  color: var(--color-text-secondary, #64748b);
  border-radius: 4px;
}

.reading-tabs__more-btn.is-open .reading-tabs__more-count {
  background: rgba(37, 99, 235, 0.2);
  color: var(--tab-text-active, #2563EB);
}

.reading-tabs__dropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 180px;
  max-height: 60vh;
  overflow-y: auto;
  background: var(--color-surface, #fff);
  border: 1px solid var(--color-border, #e2e8f0);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  padding: 4px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  z-index: 1000;
}

.reading-tabs__more-btn.is-open + .reading-tabs__dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.reading-tabs__dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  border: none;
  background: transparent;
  border-radius: 6px;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  font-size: 12px;
  font-weight: 500;
  color: var(--color-text, #334155);
  transition: background 0.15s ease;
}

.reading-tabs__dropdown-item:hover {
  background: var(--color-surface-secondary, #f1f5f9);
}

.reading-tabs__dropdown-item-drag {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  opacity: 0.5;
}

.reading-tabs__dropdown-item:hover .reading-tabs__dropdown-item-drag {
  opacity: 1;
}

.reading-tabs__dropdown-item .reading-tab__drag-svg {
  width: 12px;
  height: 12px;
}

.reading-tabs__dropdown-item--dragging {
  opacity: 0.6;
}

.reading-tabs__dropdown-item--drop-target {
  border-left: 3px solid var(--tag-blue-fg, #0d53a8);
  background: rgba(37, 99, 235, 0.08);
}

.reading-tabs__dropdown-item--loading {
  opacity: 0.8;
  cursor: default;
}

.reading-tabs__dropdown-item--loading:hover {
  background: transparent;
}

.reading-tabs__dropdown-item-spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-right: 6px;
  border: 2px solid var(--color-border, #e2e8f0);
  border-top-color: var(--color-primary, #2563EB);
  border-radius: 50%;
  animation: reading-tab-spinner-rotate 0.75s linear infinite;
  flex-shrink: 0;
}

.reading-tabs__dropdown-item-icon {
  font-size: 14px;
  flex-shrink: 0;
}

.reading-tabs__dropdown-item-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ----------------------------------------
   SPECIAL TAB STYLES
   ---------------------------------------- */

/* Compose tab - always first, special styling */
.reading-tab--compose {
  /* Slightly bolder presence */
}

/* Original tab - second position */
.reading-tab--original {
  /* Standard styling */
}

/* AI output tabs - can show handler action badge */
.reading-tab--ai-output .reading-tab__action-badge {
  display: inline-block;
  padding: 2px 6px;
  margin-left: 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
}

/* ----------------------------------------
   TAB PANEL CONTENT
   ---------------------------------------- */

.reading-tab-panel-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4, 16px);
  background: var(--color-surface);
}

/* Hide content when not active */
.reading-tab-hidden {
  display: none !important;
}

/* ----------------------------------------
   UTILITY: Tab content visibility
   ---------------------------------------- */

/* Hide original content when viewing action tab */
.reading-pane__content[data-active-tab]:not([data-active-tab="original"]) .output-original {
  display: none;
}

.reading-pane__content[data-active-tab]:not([data-active-tab="compose"]) .compose-area {
  display: none;
}

/* ----------------------------------------
   RESPONSIVE: Tablet
   ---------------------------------------- */

@media (max-width: 1024px) {
  .reading-tabs {
    padding: 6px 12px;
    gap: 6px;
  }
  
  .reading-tab {
    padding: 6px 12px;
  }
  
  .reading-tab__label {
    font-size: 12px;
  }
}

/* ----------------------------------------
   RESPONSIVE: Mobile
   ---------------------------------------- */

@media (max-width: 768px) {
  .reading-tabs {
    padding: 4px 8px;
    gap: 4px;
    min-height: 44px;
  }
  
  .reading-tab {
    padding: 6px 10px;
  }
  
  .reading-tab__icon {
    font-size: 12px;
  }
  
  .reading-tab__label {
    font-size: 11px;
  }
  
  /* On mobile, hide labels on inactive tabs to save space */
  .reading-tab:not(.is-active) .reading-tab__label {
    display: none;
  }
}

/* ----------------------------------------
   ACCESSIBILITY: Keyboard Navigation
   ---------------------------------------- */

.reading-tabs[role="tablist"] .reading-tab[role="tab"] {
  /* Proper ARIA support */
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .reading-tab {
    border: 2px solid var(--color-text-secondary);
  }
  
  .reading-tab.is-active {
    border-color: var(--color-primary);
  }
}

/* ----------------------------------------
   GUARDIAN TAB VERDICT COLORS (static)
   ---------------------------------------- */

/* Safe (green) — score ≥ 80 and no high issues */
.reading-tab--guardian-safe-color {
  border-color: var(--color-success, #10b981) !important;
  background: rgba(16, 185, 129, 0.08) !important;
  color: var(--color-success, #10b981) !important;
}

/* Review (amber) — score 50-79 or 1 high issue */
.reading-tab--guardian-review-color {
  border-color: var(--color-warning, #f59e0b) !important;
  background: rgba(245, 158, 11, 0.08) !important;
  color: var(--color-warning, #f59e0b) !important;
}

/* Caution (red) — score < 50 or ≥ 2 high issues */
.reading-tab--guardian-caution-color {
  border-color: var(--color-error, #ef4444) !important;
  background: rgba(239, 68, 68, 0.08) !important;
  color: var(--color-error, #ef4444) !important;
}

/* ----------------------------------------
   GUARDIAN RISK TAB PULSE (animated)
   ---------------------------------------- */

/* Caution (red) — score < 50 or ≥ 2 high issues */
.reading-tab--guardian-caution {
  border-color: var(--color-error) !important;
  background: rgba(239, 68, 68, 0.08) !important;
  color: var(--color-error, #ef4444) !important;
  animation: guardian-pulse-caution 2s ease-in-out infinite;
}

.reading-tab--guardian-caution .reading-tab__badge::after {
  content: '⚠';
  color: var(--color-error);
  margin-left: 4px;
  font-size: 12px;
}

@keyframes guardian-pulse-caution {
  0%, 100% { 
    background: rgba(239, 68, 68, 0.06);
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
  }
  50% { 
    background: rgba(239, 68, 68, 0.15);
    box-shadow: 0 0 8px 2px rgba(239, 68, 68, 0.2);
  }
}

/* Review (amber) — score 50-79 or 1 high issue */
.reading-tab--guardian-review {
  border-color: var(--color-warning) !important;
  background: rgba(245, 158, 11, 0.08) !important;
  color: var(--color-warning, #f59e0b) !important;
  animation: guardian-pulse-review 2s ease-in-out infinite;
}

.reading-tab--guardian-review .reading-tab__badge::after {
  content: '⚠';
  color: var(--color-warning);
  margin-left: 4px;
  font-size: 12px;
}

@keyframes guardian-pulse-review {
  0%, 100% { 
    background: rgba(245, 158, 11, 0.06);
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
  }
  50% { 
    background: rgba(245, 158, 11, 0.15);
    box-shadow: 0 0 8px 2px rgba(245, 158, 11, 0.2);
  }
}

/* ----------------------------------------
   GENERIC TAB GLOW (reports, downloads, etc.)
   ---------------------------------------- */

.reading-tab--glow {
  border-color: var(--color-primary, #2563EB) !important;
  background: rgba(37, 99, 235, 0.08);
  animation: tab-glow 2s ease-in-out infinite;
}

.reading-tab--glow .reading-tab__icon {
  animation: tab-glow-icon 2s ease-in-out infinite;
}

@keyframes tab-glow {
  0%, 100% {
    background: rgba(37, 99, 235, 0.06);
    box-shadow: 0 0 0 0 rgba(37, 99, 235, 0);
  }
  50% {
    background: rgba(37, 99, 235, 0.14);
    box-shadow: 0 0 10px 2px rgba(37, 99, 235, 0.2);
  }
}

@keyframes tab-glow-icon {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

/* ----------------------------------------
   TAB LOADING STATE (greyed-out + spinner)
   ---------------------------------------- */

.reading-tab--loading {
  opacity: 0.45;
  pointer-events: none;
  cursor: default;
}

.reading-tab--loading .reading-tab__icon {
  opacity: 0.5;
}

.reading-tab__spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-border, #e0e0e0);
  border-top-color: var(--color-primary, #2563EB);
  border-radius: 50%;
  margin-right: 4px;
  flex-shrink: 0;
  transform-origin: 50% 50%;
  animation: reading-tab-spinner-rotate 0.75s linear infinite;
  -webkit-animation: reading-tab-spinner-rotate 0.75s linear infinite;
}

@keyframes reading-tab-spinner-rotate {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@-webkit-keyframes reading-tab-spinner-rotate {
  0%   { -webkit-transform: rotate(0deg); transform: rotate(0deg); }
  100% { -webkit-transform: rotate(360deg); transform: rotate(360deg); }
}

/* ----------------------------------------
   NUMERIC BADGE COUNT
   ---------------------------------------- */

.reading-tab__badge--count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin-left: 6px;
  border-radius: 9px;
  background: var(--color-primary, #2563EB);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
}

.reading-tab.is-active .reading-tab__badge--count {
  background: rgba(255, 255, 255, 0.3);
  color: #fff;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .reading-tab,
  .reading-tab__close,
  .reading-tabs__fade {
    transition: none;
  }
  
  .reading-tab--running .reading-tab__icon {
    animation: none;
  }

  .reading-tab--guardian-caution,
  .reading-tab--guardian-review,
  .reading-tab--glow {
    animation: none;
  }

  .reading-tab--glow .reading-tab__icon {
    animation: none;
  }
}