/* ═══════════════════════════════════════════════════════════════════════
   PANEL 2 — OUTLINE
   ═══════════════════════════════════════════════════════════════════════ */

.outline-nav-row {
  margin-bottom: 12px;
}

.outline-nav-row .sp-action-btn {
  flex: 1 1 0;
}

.outline-nav-btn {
  min-height: 34px;
  padding-inline: 10px;
  font-size: 12px;
}

.outline-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.outline-empty-state {
  align-items: flex-start;
  text-align: left;
  padding: 2px 0 0;
}

.outline-empty-copy,
.outline-empty-state .sp-empty-sub {
  margin: 0;
  max-width: 24ch;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text-muted);
}

.outline-row {
  display: block;
}

.outline-surface {
  border: 1px solid var(--sp-card-border);
  border-radius: 16px;
  background: var(--bg-card);
  overflow: hidden;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}

.outline-surface.is-active {
  border-color: var(--interactive-current-border);
  background: var(--interactive-current-bg);
}

.outline-row-shell {
  position: relative;
  min-width: 0;
}

.outline-surface:focus-within {
  box-shadow: 0 0 0 2px var(--border-focus);
}

.outline-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.outline-main[data-level="1"],
.outline-entry[data-level="1"] { --outline-indent: 0px; }
.outline-main[data-level="2"],
.outline-entry[data-level="2"] { --outline-indent: 10px; }
.outline-main[data-level="3"],
.outline-entry[data-level="3"] { --outline-indent: 18px; }
.outline-main[data-level="4"],
.outline-entry[data-level="4"] { --outline-indent: 24px; }
.outline-main[data-level="5"],
.outline-entry[data-level="5"] { --outline-indent: 30px; }
.outline-main[data-level="6"],
.outline-entry[data-level="6"] { --outline-indent: 36px; }

.navigate-outline-btn {
  width: 100%;
  min-height: 0;
  display: block;
  padding: 14px 66px 6px calc(16px + var(--outline-indent, 0px));
  border: 0;
  background: transparent;
  border-radius: 0;
  text-align: left;
  appearance: none;
  -webkit-appearance: none;
  box-shadow: none;
}

.navigate-outline-btn:focus-visible {
  outline: none;
}

.outline-surface.is-active .navigate-outline-btn {
  padding-bottom: 6px;
}

.outline-entry-layout {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.outline-heading-line {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.outline-indent-guide {
  display: none;
}

.outline-text {
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: 13px;
  font-weight: 620;
  color: var(--text);
  line-height: 1.34;
}

.outline-entry[data-level="3"] .outline-text,
.outline-entry[data-level="4"] .outline-text {
  font-weight: 550;
  color: var(--text-sec);
}

.outline-entry[data-level="5"] .outline-text,
.outline-entry[data-level="6"] .outline-text {
  font-weight: 500;
  color: var(--text-muted);
}

.outline-meta {
  font-size: 11.5px;
  line-height: 1.4;
  color: var(--text-muted);
}

.outline-inline-tools {
  display: flex;
  align-items: flex-start;
  padding: 2px 66px 14px calc(16px + var(--outline-indent, 0px));
}

.outline-surface.is-active .outline-inline-tools {
  padding-top: 2px;
  margin-top: 0;
}

.outline-break-toggle--inline {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  max-width: 100%;
  min-height: 28px;
  padding: 0 12px;
  border-radius: 10px;
  border: 1px solid color-mix(in srgb, var(--sp-card-border) 90%, transparent);
  background: var(--bg-card);
  color: var(--text);
  font-size: 11.5px;
  font-weight: 560;
  line-height: 1.3;
  white-space: nowrap;
  box-shadow: 0 1px 0 color-mix(in srgb, var(--fill-muted) 50%, transparent);
}

.outline-surface.is-active .outline-break-toggle--inline {
  background: color-mix(in srgb, var(--bg-card) 92%, white);
  border-color: color-mix(in srgb, var(--interactive-current-border) 42%, var(--sp-card-border));
  color: var(--text);
  box-shadow: 0 1px 0 color-mix(in srgb, var(--interactive-current-border) 16%, transparent);
}

.outline-break-toggle--inline[aria-pressed="true"],
.outline-surface.is-active .outline-break-toggle--inline[aria-pressed="true"] {
  background: var(--interactive-selected-bg);
  color: var(--interactive-selected-fg);
  border-color: var(--interactive-selected-border);
}

.outline-actions {
  position: absolute;
  inset-inline-end: 16px;
  inset-block-start: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 0;
  background: transparent;
}

.outline-action-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  inline-size: 24px;
  block-size: 24px;
  border-radius: 8px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  line-height: 1;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), opacity var(--t-fast) var(--ease);
}

.outline-surface:hover .outline-action-btn:not(:disabled),
.outline-surface.is-active .outline-action-btn:not(:disabled) {
  background: color-mix(in srgb, var(--fill-muted) 78%, var(--bg-card));
  color: var(--text-sec);
}

.outline-action-btn svg {
  inline-size: 15px;
  block-size: 15px;
  pointer-events: none;
}

.outline-action-btn:disabled {
  opacity: .28;
  cursor: default;
}

@media (max-width: 767px) {
  .navigate-outline-btn {
    padding-right: 60px;
  }

  .outline-actions {
    inset-inline-end: 14px;
    inset-block-start: 50%;
    gap: 7px;
  }

  .outline-inline-tools {
    padding-right: 60px;
    padding-bottom: 12px;
  }
}