/* ============================================================
   SVG Branch Graph Styles
   Flow Writer — Phase 1
   Matches the DJC design system (teal / deep navy aesthetic)
   ============================================================ */

/* ---------- SVG Container ---------- */
.branch-graph-svg {
  width: 100%;
  min-height: 120px;
  background: rgba(10, 20, 35, 0.3);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  cursor: grab;
  overflow: hidden;
  display: block;
}

.branch-graph-svg:active {
  cursor: grabbing;
}

/* ---------- Viewport Transform Group ---------- */
.branch-graph-svg .viewport,
.branch-graph-svg .graph-viewport {
  transform-origin: 0 0;
}

/* ---------- Placeholder (empty state) ---------- */
.branch-graph-svg .graph-placeholder {
  font-family: var(--font-mono);
  font-size: 12px;
  fill: var(--fg-4);
  letter-spacing: 0.02em;
}

/* ---------- Edges (commit connection lines) ---------- */
.branch-graph-svg .edge {
  stroke: var(--teal-700);
  stroke-width: 1.5;
  fill: none;
  pointer-events: none;
}

/* ---------- Fork paths (branch divergence) ---------- */
.branch-graph-svg .fork-path {
  stroke: var(--accent-2);
  stroke-width: 1.5;
  stroke-dasharray: 4 3;
  fill: none;
  opacity: 0.5;
  pointer-events: none;
}

/* ---------- Commit Nodes ---------- */
.branch-graph-svg .commit-node {
  fill: var(--accent-2);
  cursor: pointer;
  transition: filter var(--dur-fast) var(--ease-out);
}

.branch-graph-svg .commit-node.head {
  r: 6px;
  filter: drop-shadow(0 0 4px var(--accent-2));
}

.branch-graph-svg .commit-node:hover {
  filter: drop-shadow(0 0 8px var(--accent-2));
}

.branch-graph-svg .commit-node.active-commit {
  stroke: var(--pulse-green);
  stroke-width: 2;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  .branch-graph-svg .commit-node,
  .branch-graph-svg .commit-node.head,
  .branch-graph-svg .commit-node:hover {
    transition: none;
    filter: none;
  }
}

/* ---------- Branch Labels ---------- */
.branch-graph-svg .branch-label {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--fg-3);
  letter-spacing: 0.04em;
  pointer-events: none;
  user-select: none;
}

.branch-graph-svg .branch-label.active {
  fill: var(--accent-2);
}

/* ---------- Active Branch Indicator ---------- */
.branch-graph-svg .active-indicator {
  stroke: var(--pulse-green);
  stroke-width: 2;
  fill: none;
  filter: drop-shadow(0 0 4px var(--pulse-green));
  pointer-events: none;
}

@media (prefers-reduced-motion: reduce) {
  .branch-graph-svg .active-indicator {
    filter: none;
  }
}

/* ============================================================
   COMMIT LIST (scrollable list below the SVG graph)
   ============================================================ */

.commit-list {
  max-height: 240px;
  overflow-y: auto;
  overflow-x: hidden;
  margin-top: var(--space-3);
  padding: var(--space-2);
  background: rgba(7, 14, 26, 0.45);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  scrollbar-width: thin;
  scrollbar-color: var(--navy-700) transparent;
}

.commit-list::-webkit-scrollbar {
  width: 6px;
}

.commit-list::-webkit-scrollbar-thumb {
  background: var(--navy-700);
  border-radius: 3px;
}

.commit-list::-webkit-scrollbar-track {
  background: transparent;
}

.commit-list-empty {
  padding: var(--space-4) var(--space-3);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-4);
  letter-spacing: 0.02em;
}

/* Individual commit row */
.commit-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
  transition: all var(--dur-fast) var(--ease-out);
  border: 1px solid transparent;
  position: relative;
}

.commit-item:hover {
  background: rgba(20, 184, 154, 0.08);
  color: var(--fg-1);
}

.commit-item.active {
  background: rgba(20, 184, 154, 0.12);
  border-color: var(--border-accent);
  box-shadow: var(--glow-teal-sm);
}

.commit-item.active::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--accent-2);
  border-radius: 2px;
  box-shadow: 0 0 4px var(--accent-2);
}

/* Commit message text */
.commit-item .message {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}

/* Relative timestamp */
.commit-item .time {
  flex-shrink: 0;
  font-size: 10px;
  color: var(--fg-4);
  letter-spacing: 0.02em;
}

/* Word count delta */
.commit-item .delta {
  flex-shrink: 0;
  font-size: 10px;
  color: var(--fg-4);
  min-width: 28px;
  text-align: right;
}

.commit-item .delta.positive {
  color: var(--pulse-green);
}

.commit-item .delta.negative {
  color: var(--danger-red);
}

/* ============================================================
   GRAPH TOOLTIP
   ============================================================ */

.graph-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(7,14,26,0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--fg-2);
  box-shadow: var(--shadow-md);
  z-index: 50;
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease-out);
  max-width: 280px;
  line-height: 1.5;
}

.graph-tooltip.visible {
  opacity: 1;
}

.graph-tooltip .msg {
  color: var(--fg-1);
  margin-bottom: 4px;
  font-weight: 500;
  word-break: break-word;
}

.graph-tooltip .meta {
  color: var(--fg-4);
  font-size: 10px;
  line-height: 1.6;
}

/* ============================================================
   GRAPH ZOOM CONTROLS
   ============================================================ */

.graph-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 0;
  margin-top: 4px;
}

.graph-control-btn {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-sm);
  background: rgba(7,14,26,0.5);
  border: 1px solid var(--border-subtle);
  color: var(--fg-3);
  font-family: var(--font-mono);
  font-size: 14px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease-out);
}

.graph-control-btn:hover {
  color: var(--accent-2);
  border-color: var(--border-accent);
  background: rgba(20,184,154,0.08);
}

/* ============================================================
   ENHANCED COMMIT HISTORY
   ============================================================ */

.commit-group-header {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-4);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 8px 4px 4px;
  border-top: 1px solid var(--border-subtle);
  margin-top: 4px;
}

.commit-group-header:first-child {
  border-top: none;
  margin-top: 0;
}

.commit-item {
  position: relative;
}

.commit-item .branch-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.commit-item .restore-btn {
  opacity: 0;
  transition: opacity var(--dur-fast);
  font-size: 10px;
  color: var(--accent-2);
  cursor: pointer;
  background: transparent;
  border: 0;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

.commit-item .restore-btn:hover {
  background: rgba(20,184,154,0.08);
}

.commit-item:hover .restore-btn {
  opacity: 1;
}

.commit-item .commit-msg {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
}

.commit-item .commit-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

/* ============================================================
   REDUCED MOTION
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  .branch-graph-svg,
  .branch-graph-svg .commit-node,
  .branch-graph-svg .active-indicator,
  .commit-item,
  .commit-item.active,
  .graph-tooltip,
  .graph-control-btn {
    transition: none;
    filter: none;
    animation: none;
  }
}

/* ============================================================
   LIGHT THEME OVERRIDES
   Toggle via: document.documentElement.setAttribute('data-theme', 'light')
   ============================================================ */

/* -- SVG Container -- */
html[data-theme="light"] .branch-graph-svg {
  background: rgba(255, 255, 255, 0.5);
  border-color: var(--border-subtle);
}

/* -- Placeholder text (empty state) -- */
html[data-theme="light"] .branch-graph-svg .graph-placeholder {
  fill: var(--fg-3);
}

/* -- Edges (commit connection lines) -- */
html[data-theme="light"] .branch-graph-svg .edge {
  stroke: rgba(20, 184, 154, 0.35);
}

/* -- Fork paths (branch divergence curves) -- */
html[data-theme="light"] .branch-graph-svg .fork-path {
  stroke: var(--accent-1);
  opacity: 0.35;
}

/* -- Commit Nodes -- */
html[data-theme="light"] .branch-graph-svg .commit-node {
  stroke: rgba(255, 255, 255, 0.6);
  stroke-width: 0.5;
}

html[data-theme="light"] .branch-graph-svg .commit-node.head {
  filter: drop-shadow(0 0 3px rgba(20, 184, 154, 0.35));
}

html[data-theme="light"] .branch-graph-svg .commit-node:hover {
  filter: drop-shadow(0 0 6px rgba(20, 184, 154, 0.45));
}

/* -- Branch Labels -- */
html[data-theme="light"] .branch-graph-svg .branch-label {
  fill: var(--fg-3);
}

html[data-theme="light"] .branch-graph-svg .branch-label.active {
  fill: var(--accent-1);
}

/* -- Active Branch Indicator -- */
html[data-theme="light"] .branch-graph-svg .active-indicator {
  stroke: var(--pulse-green);
  filter: drop-shadow(0 0 3px rgba(74, 222, 128, 0.45));
}

/* ============================================================
   LIGHT THEME — Commit List
   ============================================================ */

html[data-theme="light"] .commit-list {
  background: rgba(255, 255, 255, 0.55);
  border-color: var(--border-subtle);
  scrollbar-color: rgba(148, 163, 184, 0.35) transparent;
}

html[data-theme="light"] .commit-list::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.35);
}

html[data-theme="light"] .commit-list-empty {
  color: var(--fg-3);
}

html[data-theme="light"] .commit-item {
  color: var(--fg-2);
  border-color: transparent;
}

html[data-theme="light"] .commit-item:hover {
  background: rgba(20, 184, 154, 0.06);
  border-left-color: var(--accent-1);
  color: var(--fg-1);
}

html[data-theme="light"] .commit-item.active {
  background: rgba(20, 184, 154, 0.08);
  border-color: var(--border-accent);
  box-shadow: 0 0 0 1px rgba(20, 184, 154, 0.12);
}

html[data-theme="light"] .commit-item .time {
  color: var(--fg-3);
}

html[data-theme="light"] .commit-item .delta {
  color: var(--fg-3);
}

html[data-theme="light"] .commit-group-header {
  color: var(--fg-3);
  border-color: var(--border-subtle);
}

/* ============================================================
   LIGHT THEME — Graph Tooltip
   ============================================================ */

html[data-theme="light"] .graph-tooltip {
  background: rgba(255, 255, 255, 0.95);
  border-color: var(--border-subtle);
  color: var(--fg-2);
  box-shadow: var(--shadow-md);
}

html[data-theme="light"] .graph-tooltip .msg {
  color: var(--fg-1);
}

html[data-theme="light"] .graph-tooltip .meta {
  color: var(--fg-3);
}

/* ============================================================
   LIGHT THEME — Graph Controls
   ============================================================ */

html[data-theme="light"] .graph-controls {
  /* Inherits from dark — no override needed */
}

html[data-theme="light"] .graph-control-btn {
  background: rgba(240, 244, 248, 0.7);
  border-color: var(--border-subtle);
  color: var(--fg-3);
}

html[data-theme="light"] .graph-control-btn:hover {
  color: var(--accent-1);
  border-color: var(--border-accent);
  background: rgba(20, 184, 154, 0.06);
}