/* ── LitDiff — CSS variables (GitHub dark theme) ───── */
:root {
  --bg:             #010409;
  --panel:          #0d1117;
  --surface:        #161b22;
  --border:         #30363d;
  --border-subtle:  #21262d;
  --text:           #e6edf3;
  --muted:          #8b949e;
  --disabled-text:  #484f58;
  --input-bg:       #0d1117;
  --accent:         #58a6ff;
  --diff-bg:        #0d1117;
  --btn-bg:         #21262d;
  --btn-border:     #363b42;
  --btn-hover:      #30363d;
  --code-font:      ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --ui-font:        -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --toolbar-font-size: 12px;
  --sidebar-w:      280px;
}

/* ── Reset & scrollbar ─────────────────────────────── */
* { box-sizing: border-box; scrollbar-width: thin; scrollbar-color: var(--border) var(--bg); }

::-webkit-scrollbar       { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--disabled-text); }
::-webkit-scrollbar-corner { background: var(--bg); }

html, body {
  margin: 0;
  font-family: var(--ui-font);
  color: var(--text);
  background: var(--bg);
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Toolbar ───────────────────────────────────────── */
#toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  font-size: var(--toolbar-font-size);
}

#toolbar select,
#toolbar input[type="text"],
#toolbar input[type="password"],
#toolbar button {
  color: var(--text);
  font-size: var(--toolbar-font-size);
  font-family: var(--ui-font);
  border-radius: 6px;
  line-height: 20px;
}

#toolbar select,
#toolbar input[type="text"],
#toolbar input[type="password"] {
  background: var(--input-bg);
  border: 1px solid var(--border);
  padding: 5px 12px;
}

#toolbar button {
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  padding: 5px 16px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.1s, border-color 0.1s;
}
#toolbar button:hover                  { background: var(--btn-hover); border-color: var(--muted); }
#toolbar button:disabled               { color: var(--disabled-text); border-color: var(--border-subtle); background: var(--surface); cursor: not-allowed; opacity: 0.6; }

#btn-info {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px 7px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s;
}
#btn-info svg { flex-shrink: 0; opacity: 0.92; }
#btn-info:hover {
  color: var(--accent);
  background: transparent;
  border-color: transparent;
}
#btn-info:hover svg { opacity: 1; }

.toolbar-separator {
  width: 1px;
  height: 20px;
  background: var(--border);
  flex-shrink: 0;
}

#toolbar select                        { max-width: 420px; min-width: 90px; appearance: none;
                                          background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238b949e'%3E%3Cpath d='M6 8.5L1.5 4h9z'/%3E%3C/svg%3E");
                                          background-repeat: no-repeat; background-position: right 8px center; padding-right: 28px; }
#toolbar select:disabled               { color: var(--disabled-text); border-color: var(--border-subtle); cursor: not-allowed; opacity: 0.6; }
#toolbar input[type="text"],
#toolbar input[type="password"]        { outline: none; }
#toolbar input[type="text"]            { flex: 1; min-width: 180px; }
#toolbar input[type="password"]        { min-width: 120px; max-width: 180px; }
#toolbar input[type="text"]:focus,
#toolbar input[type="password"]:focus  { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(56,139,253,0.3); }
#toolbar input[type="text"]::placeholder,
#toolbar input[type="password"]::placeholder { color: var(--disabled-text); }
#toolbar input:-webkit-autofill,
#toolbar input:-webkit-autofill:hover,
#toolbar input:-webkit-autofill:focus,
#toolbar input:-webkit-autofill:active { -webkit-text-fill-color: var(--text); -webkit-box-shadow: 0 0 0 1000px var(--input-bg) inset; transition: background-color 5000s ease-in-out 0s; caret-color: var(--text); }
#toolbar input::selection              { background: rgba(56,139,253,0.4); color: var(--text); }
#toolbar label                         { font-size: var(--toolbar-font-size); color: var(--muted); flex-shrink: 0; font-weight: 500; }

#pr-title {
  display: none;
  font-size: 11px;
  color: var(--muted);
  padding: 6px 12px 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.4;
  border-bottom: 1px solid var(--border-subtle);
}
#pr-title:not(:empty) { display: block; }

#status-msg {
  font-size: 11px;
  color: var(--muted);
  margin-left: auto;
  white-space: nowrap;
  background: var(--btn-bg);
  padding: 2px 10px;
  border-radius: 20px;
  border: 1px solid var(--border);
}

/* ── Layout (sidebar + splitter + diff pane) ───────── */
#main { display: flex; flex: 1; min-height: 0; overflow: hidden; }

#sidebar {
  width: var(--sidebar-w);
  min-width: 140px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--panel);
  border-right: 1px solid var(--border);
}

#sidebar-header {
  padding: 10px 12px;
  font-weight: 600;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

#file-count-badge {
  font-size: 11px;
  font-weight: 500;
  background: var(--btn-bg);
  color: var(--muted);
  padding: 0 7px;
  border-radius: 20px;
  line-height: 20px;
  border: 1px solid var(--border);
}

#file-list { flex: 1; overflow-y: auto; padding: 4px; font-size: 12px; background: var(--panel); }

/* ── Sidebar file items ────────────────────────────── */
.file-item {
  padding: 6px 8px;
  font-size: 12px;
  font-family: var(--code-font);
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
  border-radius: 6px;
  margin: 1px 0;
  display: flex;
  align-items: center;
  transition: background 0.1s;
}
.file-item:hover        { background: #1c2128; }
.file-item.active       { background: rgba(56,139,253,0.15); color: #fff; }

.file-name-text {
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

/* ── Splitter (sidebar & code-panel) ───────────────── */
#splitter,
.code-panel-splitter {
  flex: 0 0 1px;
  cursor: col-resize;
  background: var(--border);
  position: relative;
  z-index: 10;
  transition: background 0.15s;
}
#splitter::after,
.code-panel-splitter::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: -3px; right: -3px;
}
#splitter:hover, #splitter.dragging,
.code-panel-splitter:hover, .code-panel-splitter.dragging { background: var(--accent); }

/* ── Diff pane ─────────────────────────────────────── */
#diff-pane  { flex: 1; overflow: auto; padding: 0; background: var(--diff-bg); }

#diff-pane.sbs-mode                    { display: flex; flex-direction: column; overflow: hidden; }
#diff-pane.sbs-mode .d2h-wrapper       { flex: 1; display: flex !important; flex-direction: column !important; min-height: 0 !important; overflow: hidden !important; }
#diff-pane.sbs-mode .d2h-file-wrapper  { flex: 1 !important; display: flex !important; flex-direction: column !important; min-height: 0 !important; overflow: hidden !important; }
#diff-pane.sbs-mode .d2h-file-diff     { flex: 1 !important; display: flex !important; flex-direction: column !important; min-height: 0 !important; overflow: hidden !important; }
#diff-pane.sbs-mode .d2h-files-diff    { flex: 1 !important; min-height: 0 !important; }
#diff-pane.sbs-mode .d2h-file-side-diff { overflow-y: auto !important; }

/* ── Empty state (shown before first PR load) ──────── */
#diff-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--muted);
  font-size: 14px;
  gap: 8px;
}
#diff-empty .hint { font-size: 12px; }

/* ── diff2html dark-mode overrides ─────────────────── */

.d2h-wrapper,
.d2h-code-line-ctn,
.d2h-code-linenumber,
.d2h-code-side-linenumber {
  font-family: var(--code-font) !important;
  font-size: 12px !important;
}

.d2h-wrapper                    { background: var(--diff-bg) !important; }
.d2h-file-wrapper               { border: 1px solid var(--border-subtle) !important; border-radius: 6px !important; background: var(--diff-bg) !important; margin-bottom: 0 !important; overflow: hidden; }
.d2h-file-diff                  { margin-bottom: 0 !important; }
.d2h-file-list-wrapper          { display: none !important; }

.d2h-file-header                { background: var(--surface) !important; color: var(--text) !important; border-bottom: 1px solid var(--border-subtle) !important; padding: 8px 10px !important; }
.d2h-file-header .d2h-file-name { color: var(--text) !important; font-size: 12px !important; }

.d2h-info                       { background: var(--surface) !important; color: #6e7681 !important; border-color: var(--border-subtle) !important; transition: background 0.15s ease; }
.d2h-code-line.d2h-info         { background: var(--surface) !important; }

/* ── Expandable hunk headers ───────────────────────── */
tr.expandable-hunk              { cursor: pointer; }
tr.expandable-hunk > td,
tr.expandable-hunk .d2h-info    { transition: background 0.15s ease, border-color 0.15s ease; }
tr.expandable-hunk .d2h-info    { border-left: 2px solid var(--accent) !important; }
tr.expandable-hunk .d2h-code-line-ctn { color: var(--accent) !important; opacity: 0.8; }
tr.expandable-hunk:hover > td,
tr.expandable-hunk:hover .d2h-info,
tr.expandable-hunk:hover .d2h-code-line.d2h-info { background: rgba(56,139,253,0.15) !important; }
tr.expandable-hunk:hover .d2h-code-line-ctn { opacity: 1; text-decoration: underline; text-underline-offset: 3px; }
.d2h-expand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  vertical-align: middle;
  opacity: 0.7;
  transition: opacity 0.15s, transform 0.15s;
}
.d2h-expand-icon svg { display: block; }
tr.expandable-hunk:hover .d2h-expand-icon { opacity: 1; transform: scaleY(1.25); }
.d2h-emptyplaceholder           { background: var(--surface) !important; border-color: var(--border-subtle) !important; }

/* ── Normal (unchanged) diff lines ─────────────────── */
.d2h-code-line,
.d2h-code-side-line             { background: var(--diff-bg) !important; color: var(--text) !important; }
.d2h-code-line-ctn              { background: transparent !important; color: var(--text) !important; }

.d2h-code-linenumber,
.d2h-code-side-linenumber       { background: var(--diff-bg) !important; color: #6e7681 !important; border-color: var(--border-subtle) !important; }

/* ── Shared del / ins color overrides ──────────────── */
.d2h-del, .d2h-ins { color: var(--text) !important; }

.d2h-del .d2h-code-line, .d2h-del .d2h-code-side-line,
.d2h-ins .d2h-code-line, .d2h-ins .d2h-code-side-line,
.d2h-del .d2h-code-line-ctn,
.d2h-ins .d2h-code-line-ctn { background: transparent !important; color: var(--text) !important; }

del.d2h-change, ins.d2h-change,
.d2h-code-line-ctn del, .d2h-code-line-ctn ins { background: transparent !important; text-decoration: none !important; color: inherit !important; }

/* ── Deleted lines (red) ───────────────────────────── */
.d2h-code-line.d2h-del, .d2h-code-side-line.d2h-del, td.d2h-del { background: #3f1d22 !important; }
.d2h-del.d2h-code-linenumber, .d2h-del.d2h-code-side-linenumber { background: #351920 !important; }

/* ── Added lines (green) ───────────────────────────── */
.d2h-code-line.d2h-ins, .d2h-code-side-line.d2h-ins, td.d2h-ins { background: #1b3a2a !important; }
.d2h-ins.d2h-code-linenumber, .d2h-ins.d2h-code-side-linenumber { background: #163225 !important; }

/* ── Line number sizing ────────────────────────────── */
.d2h-code-linenumber            { width: 86px !important; direction: ltr !important; min-width: 86px !important; }
.line-num1, .line-num2          { width: 40px !important; overflow: visible !important; text-overflow: clip !important; }
.d2h-code-line                  { padding-left: 92px !important; }

/* ── Table / layout ────────────────────────────────── */
.d2h-diff-table                 { border-collapse: collapse !important; }
.d2h-diff-table tr              { position: relative !important; border: none !important; }
.d2h-diff-table td              { border-color: var(--border-subtle) !important; }
.d2h-files-diff                 { display: flex !important; }
.d2h-file-side-diff             { overflow-x: auto; overflow-y: hidden; flex: 1; min-width: 0; }

/* ── Highlight context menu (right-click) ─────────── */
#highlight-context-menu {
  display: none;
  position: fixed;
  z-index: 1000;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 0;
  min-width: 140px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5), 0 0 0 1px rgba(0,0,0,0.15);
  font-family: var(--ui-font);
  font-size: 13px;
}

.highlight-menu-item {
  padding: 6px 14px;
  cursor: pointer;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  transition: background 0.1s;
}
.highlight-menu-item:hover { background: rgba(56,139,253,0.15); }
.highlight-menu-item svg   { flex-shrink: 0; opacity: 0.7; }

/* ── Highlight marks (color chosen by phrase order; 8 hues cycle) ── */
/* #diff-pane + mark + dual class + !important: beat diff2html/td !important and UA <mark> */
#diff-pane mark.diff-highlight {
  border-radius: 2px;
  color: inherit;
  padding: 0 1px;
  border-bottom: 2px solid;
}
#diff-pane mark.diff-highlight.diff-highlight--0 { background-color: rgba(210, 153, 34, 0.35) !important; border-bottom-color: #d29922 !important; }
#diff-pane mark.diff-highlight.diff-highlight--1 { background-color: rgba(56, 189, 248, 0.3) !important;  border-bottom-color: #38bdf8 !important; }
#diff-pane mark.diff-highlight.diff-highlight--2 { background-color: rgba(244, 114, 182, 0.32) !important; border-bottom-color: #f472b6 !important; }
#diff-pane mark.diff-highlight.diff-highlight--3 { background-color: rgba(163, 230, 53, 0.22) !important; border-bottom-color: #a3e635 !important; }
#diff-pane mark.diff-highlight.diff-highlight--4 { background-color: rgba(167, 139, 250, 0.32) !important; border-bottom-color: #a78bfa !important; }
#diff-pane mark.diff-highlight.diff-highlight--5 { background-color: rgba(251, 146, 60, 0.3) !important;  border-bottom-color: #fb923c !important; }
#diff-pane mark.diff-highlight.diff-highlight--6 { background-color: rgba(45, 212, 191, 0.28) !important; border-bottom-color: #2dd4bf !important; }
#diff-pane mark.diff-highlight.diff-highlight--7 { background-color: rgba(251, 113, 133, 0.3) !important; border-bottom-color: #fb7185 !important; }

/* ── About modal ──────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(2px);
}
.modal-overlay.hidden { display: none; }

#about-modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  width: min(720px, 94vw);
  max-width: 94vw;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6);
  overflow: hidden;
}

.modal-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.modal-title {
  flex: 1;
  min-width: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}
.modal-header-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}
.modal-github-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  padding: 4px 6px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.modal-github-link:hover {
  color: var(--text);
  background: var(--btn-bg);
}
.modal-github-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.modal-header-actions button {
  background: none;
  border: none;
  color: var(--muted);
  font-size: 20px;
  cursor: pointer;
  line-height: 1;
  padding: 4px 6px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.modal-header-actions button:hover {
  color: var(--text);
  background: var(--btn-bg);
}
.modal-header-actions button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.modal-body {
  padding: 16px;
  font-size: 13px;
  color: var(--text);
  line-height: 1.6;
}
.modal-body p   { margin: 0 0 10px; }
.modal-body ul  { margin: 6px 0 0; padding-left: 20px; }
.modal-body li  { margin-bottom: 4px; }
.modal-body a   { color: var(--accent); text-decoration: none; }
.modal-body a:hover { text-decoration: underline; }
.modal-body code {
  background: var(--btn-bg);
  padding: 1px 5px;
  border-radius: 4px;
  font-family: var(--code-font);
  font-size: 12px;
}
.modal-body h4 {
  margin: 14px 0 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.modal-warning {
  background: rgba(210, 153, 34, 0.1);
  border: 1px solid rgba(210, 153, 34, 0.3);
  border-radius: 6px;
  padding: 8px 12px;
  font-size: 12px;
  color: #d29922;
}