/* ============================================================
   ANNOTATION SYSTEM — Styles
   ============================================================ */

/* ── 1. Auth modal ─────────────────────────────────────────── */
.ann-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease;
}
.ann-modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}
.ann-modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: 2rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-2xl);
  transform: translateY(12px);
  transition: transform 200ms ease;
}
.ann-modal-overlay.open .ann-modal {
  transform: translateY(0);
}
.ann-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}
.ann-modal-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.ann-modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: all 150ms ease;
  cursor: pointer;
}
.ann-modal-close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text);
}
.ann-modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 1.5rem;
  gap: 0;
}
.ann-modal-tab {
  flex: 1;
  padding: 0.625rem;
  text-align: center;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 150ms ease;
}
.ann-modal-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}
.ann-modal-form { display: flex; flex-direction: column; gap: 1rem; }
.ann-modal-form label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 0.375rem;
  display: block;
}
.ann-modal-form input {
  width: 100%;
  padding: 0.625rem 0.875rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  transition: border-color 150ms ease, box-shadow 150ms ease;
  box-sizing: border-box;
}
.ann-modal-form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}
.ann-modal-error {
  font-size: 0.8125rem;
  color: var(--color-error);
  display: none;
}
.ann-modal-error.visible { display: block; }
.ann-modal-submit {
  width: 100%;
  padding: 0.75rem;
  background: var(--gradient-primary);
  color: white;
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: opacity 150ms ease, transform 150ms ease;
  margin-top: 0.25rem;
}
.ann-modal-submit:hover { opacity: 0.9; transform: translateY(-1px); }
.ann-modal-submit:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

/* ── 2. Annotation tab trigger (right edge) ────────────────── */
.ann-tab-trigger {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  cursor: pointer;
}
.ann-tab-btn {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  background: var(--color-primary);
  color: white;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 1rem 0.625rem;
  border-radius: 8px 0 0 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: -2px 0 12px rgba(99,102,241,0.3);
  transition: background 150ms ease, padding 150ms ease;
  user-select: none;
}
.ann-tab-btn:hover { background: var(--color-primary-dark); padding-left: 0.875rem; }
.ann-tab-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  background: white;
  color: var(--color-primary);
  font-size: 0.6875rem;
  font-weight: 700;
  border-radius: 9999px;
  padding: 0 4px;
}

/* ── 3. Side panel ─────────────────────────────────────────── */
.ann-panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 360px;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  z-index: 300;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 280ms cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -8px 0 32px rgba(0,0,0,0.12);
}
.ann-panel.open {
  transform: translateX(0);
}
.ann-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}
.ann-panel-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.ann-panel-subtitle {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  margin-top: 2px;
}
.ann-panel-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 150ms ease;
  flex-shrink: 0;
}
.ann-panel-close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text);
}

/* Filter tabs */
.ann-panel-filters {
  display: flex;
  gap: 0.375rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  flex-wrap: wrap;
}
.ann-filter-btn {
  padding: 0.3125rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 150ms ease;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  background: transparent;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}
.ann-filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}
.ann-filter-btn:not(.active):hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* Auth prompt inside panel */
.ann-panel-auth-prompt {
  padding: 2rem 1.25rem;
  text-align: center;
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}
.ann-panel-auth-prompt.visible { display: flex; }
.ann-panel-auth-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-xl);
  background: rgba(99,102,241,0.1);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}
.ann-panel-auth-text {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}
.ann-panel-auth-btn {
  padding: 0.5rem 1.25rem;
  background: var(--gradient-primary);
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: opacity 150ms ease;
}
.ann-panel-auth-btn:hover { opacity: 0.9; }

/* User info bar */
.ann-panel-user-bar {
  padding: 0.625rem 1.25rem;
  background: var(--color-bg-secondary);
  border-bottom: 1px solid var(--color-border);
  display: none;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
}
.ann-panel-user-bar.visible { display: flex; }
.ann-panel-user-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.ann-panel-avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: white;
  font-size: 0.6875rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.ann-panel-username {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text);
}
.ann-panel-logout {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  cursor: pointer;
  transition: color 150ms ease;
}
.ann-panel-logout:hover { color: var(--color-error); }

/* Annotation list */
.ann-panel-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
}
.ann-panel-list::-webkit-scrollbar { width: 4px; }
.ann-panel-list::-webkit-scrollbar-track { background: transparent; }
.ann-panel-list::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 9999px; }

.ann-empty {
  text-align: center;
  padding: 2.5rem 1rem;
  color: var(--color-text-subtle);
  font-size: 0.875rem;
  line-height: 1.6;
}
.ann-empty-icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
  display: block;
}

/* Individual annotation card */
.ann-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 0.875rem 1rem;
  margin-bottom: 0.625rem;
  cursor: pointer;
  transition: all 150ms ease;
  position: relative;
}
.ann-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-sm);
  background: var(--color-surface);
}
.ann-card.highlighted {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(99,102,241,0.15);
}
.ann-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}
.ann-type-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  flex-shrink: 0;
}
.ann-type-question       { background: rgba(59,130,246,0.12); color: #3b82f6; }
.ann-type-feature_request { background: rgba(139,92,246,0.12); color: #8b5cf6; }
.ann-type-kudos          { background: rgba(245,158,11,0.12); color: #f59e0b; }

.ann-card-author {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
}
.ann-card-date {
  font-size: 0.6875rem;
  color: var(--color-text-subtle);
  margin-left: auto;
}

.ann-card-anchor {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  background: var(--color-bg-tertiary);
  border-left: 2px solid var(--color-primary);
  padding: 0.25rem 0.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 0.5rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-style: italic;
  font-family: var(--font-sans);
}

.ann-card-body {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

.ann-card-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.625rem;
}
.ann-card-action-btn {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 150ms ease;
  border: 1px solid var(--color-border);
  color: var(--color-text-subtle);
}
.ann-card-action-btn:hover {
  border-color: var(--color-primary-light);
  color: var(--color-primary);
}
.ann-card-action-btn.resolve {
  border-color: rgba(16,185,129,0.3);
  color: var(--color-success);
}
.ann-card-action-btn.resolve:hover {
  background: rgba(16,185,129,0.1);
}
.ann-card-action-btn.delete:hover {
  border-color: rgba(239,68,68,0.3);
  color: var(--color-error);
}
.ann-resolved-badge {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-success);
  background: rgba(16,185,129,0.1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-left: auto;
}

/* ── 4. Text selection popup ───────────────────────────────── */
.ann-selection-popup {
  position: fixed;
  z-index: 500;
  background: var(--color-text);
  border-radius: var(--radius-lg);
  padding: 0.375rem 0.5rem;
  display: none;
  align-items: center;
  gap: 0.25rem;
  box-shadow: var(--shadow-xl);
  transform: translateY(-8px);
  white-space: nowrap;
  /* Arrow */
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.2));
}
.ann-selection-popup::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--color-text);
}
.ann-selection-popup.visible { display: flex; }

.ann-sel-btn {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.3125rem 0.625rem;
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  font-weight: 600;
  color: white;
  cursor: pointer;
  transition: background 150ms ease;
  white-space: nowrap;
}
.ann-sel-btn:hover { background: rgba(255,255,255,0.15); }
.ann-sel-btn svg { flex-shrink: 0; }

.ann-sel-divider {
  width: 1px;
  height: 18px;
  background: rgba(255,255,255,0.2);
  flex-shrink: 0;
}

/* ── 5. Inline comment form ────────────────────────────────── */
.ann-form-popup {
  position: fixed;
  z-index: 500;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: 1rem;
  width: 300px;
  box-shadow: var(--shadow-xl);
  display: none;
}
.ann-form-popup.visible { display: block; }

.ann-form-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}
.ann-form-type-label {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--color-text);
}
.ann-form-close {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 150ms ease;
}
.ann-form-close:hover { background: var(--color-bg-tertiary); color: var(--color-text); }

.ann-form-anchor-preview {
  font-size: 0.75rem;
  color: var(--color-text-subtle);
  background: var(--color-bg-secondary);
  border-left: 2px solid var(--color-primary);
  padding: 0.25rem 0.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 0.75rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-style: italic;
}

.ann-form-textarea {
  width: 100%;
  min-height: 80px;
  padding: 0.625rem 0.75rem;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-size: 0.875rem;
  font-family: var(--font-sans);
  line-height: 1.5;
  resize: vertical;
  transition: border-color 150ms ease, box-shadow 150ms ease;
  box-sizing: border-box;
}
.ann-form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
}
.ann-form-textarea::placeholder { color: var(--color-text-subtle); }

.ann-form-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.5rem;
  margin-top: 0.625rem;
}
.ann-form-cancel {
  padding: 0.4375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 150ms ease;
}
.ann-form-cancel:hover { background: var(--color-bg-tertiary); color: var(--color-text); }
.ann-form-submit {
  padding: 0.4375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  background: var(--gradient-primary);
  color: white;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: opacity 150ms ease;
}
.ann-form-submit:hover { opacity: 0.9; }
.ann-form-submit:disabled { opacity: 0.5; cursor: not-allowed; }

/* ── 6. Highlighted text in docs ───────────────────────────── */
.ann-highlight {
  background: rgba(99,102,241,0.15);
  border-bottom: 2px solid rgba(99,102,241,0.5);
  border-radius: 2px;
  cursor: pointer;
  transition: background 150ms ease;
}
.ann-highlight:hover { background: rgba(99,102,241,0.25); }
.ann-highlight.ann-highlight-question       { background: rgba(59,130,246,0.12); border-bottom-color: #3b82f6; }
.ann-highlight.ann-highlight-feature_request { background: rgba(139,92,246,0.12); border-bottom-color: #8b5cf6; }
.ann-highlight.ann-highlight-kudos          { background: rgba(245,158,11,0.12); border-bottom-color: #f59e0b; }

/* ── 7. Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .ann-panel { width: 100%; }
  .ann-tab-trigger { display: none; }
}