/* ReMind — Cây chữ (text tree). Đường nối vẽ bằng CSS (border/pseudo), KHÔNG dùng ký tự ├└│ trong DOM. */

/* ---- nút gạt Sơ đồ | Cây chữ trên topbar ---- */
.view-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; background: var(--panel); flex-shrink: 0; }
.view-toggle button {
  border: 0; background: transparent; color: var(--text-soft);
  font: 600 12px var(--font-ui); padding: 5px 10px; cursor: pointer; white-space: nowrap;
}
.view-toggle button + button { border-left: 1px solid var(--border); }
.view-toggle button:hover { background: var(--panel-hover); color: var(--text); }
.view-toggle button.active { background: var(--accent); color: #fff; }
.view-toggle button:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }

/* ---- khung ---- */
.tv {
  --tv-bg: var(--bg);
  --tv-fg: var(--text);
  --tv-muted: var(--text-muted);
  --tv-line: color-mix(in srgb, var(--text-soft) 62%, transparent);
  --tv-sel: var(--accent-soft);
  --tv-hit: color-mix(in srgb, var(--warning) 42%, transparent);
  --tv-bar: var(--panel);
  --tv-ind: 22px;
  --tv-fs: 13px;
  --tv-lh: calc(var(--tv-fs) * 1.5);
  --tv-font: "IBM Plex Mono", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  position: absolute; inset: 0; z-index: 62;
  display: flex; flex-direction: column;
  background: var(--tv-bg); color: var(--tv-fg);
  font-family: var(--tv-font); font-size: var(--tv-fs);
}
.tv[hidden] { display: none !important; }
[data-theme="dark"] .tv { --tv-line: color-mix(in srgb, var(--text-soft) 55%, transparent); --tv-hit: color-mix(in srgb, var(--warning) 50%, transparent); }
body[data-mode]:not([data-mode="map"]) .tv,
body.repo-tab .tv { display: none !important; }
/* Cây chữ che canvas: ẩn các lớp phủ của sơ đồ cho khỏi nằm đè / bắt phím */
body.tree-on #fab, body.tree-on #minimap, body.tree-on #selToolbar, body.tree-on #mapTabs,
body.tree-on #wfOverlay, body.tree-on .wf-overlay, body.tree-on #welcome { visibility: hidden !important; pointer-events: none !important; }
body.tree-on #zoomOut, body.tree-on #zoomIn, body.tree-on #zoomLabel, body.tree-on #fitBtn,
body.tree-on #toolHand, body.tree-on #toolSelect, body.tree-on #minimapBtn,
body.tree-on #presentBtn, body.tree-on #focusBtn { opacity: .35; pointer-events: none; }

/* ---- thanh công cụ (dính trên cùng) ---- */
.tv-bar {
  flex: 0 0 auto; display: flex; flex-wrap: wrap; align-items: center; gap: 6px 14px;
  padding: 8px 14px; background: var(--tv-bar); border-bottom: 1px solid var(--border);
  font-family: var(--font-ui); font-size: 12px; position: relative; z-index: 3;
}
.tv-grp { display: inline-flex; align-items: center; gap: 6px; }
.tv-lbl { color: var(--text-muted); font-weight: 600; }
.tv-seg { display: inline-flex; border: 1px solid var(--border); border-radius: 7px; overflow: hidden; background: var(--bg-elev, var(--panel-2)); }
.tv-seg button, .tv-btn {
  border: 0; background: transparent; color: var(--text-soft);
  font: 600 12px var(--font-ui); padding: 4px 9px; cursor: pointer; white-space: nowrap;
}
.tv-seg button + button { border-left: 1px solid var(--border); }
.tv-seg button:hover, .tv-btn:hover { background: var(--panel-hover); color: var(--text); }
.tv-seg button.on { background: var(--accent); color: #fff; }
.tv-btn { border: 1px solid var(--border); border-radius: 7px; background: var(--bg-elev, var(--panel-2)); }
.tv-btn[hidden] { display: none; }
.tv-bar button:focus-visible, .tv-bar input:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
.tv-filter {
  width: 170px; padding: 4px 8px; border: 1px solid var(--border); border-radius: 7px;
  background: var(--bg-elev, var(--panel-2)); color: var(--text); font: 12px var(--font-ui);
}
.tv-filter:focus { outline: none; border-color: var(--accent); }
.tv-count { color: var(--text-muted); min-width: 0; }
.tv-font { width: 78px; accent-color: var(--accent); }
.tv-ro { color: var(--warning); font-weight: 700; }
.tv-menu-wrap { position: relative; }
.tv-menu {
  position: absolute; top: calc(100% + 4px); left: 0; z-index: 5; min-width: 190px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px; box-shadow: var(--shadow); padding: 4px;
}
.tv-menu[hidden] { display: none; }
.tv-menu div { padding: 6px 10px; border-radius: 5px; cursor: pointer; color: var(--text); white-space: nowrap; }
.tv-menu div:hover, .tv-menu div:focus { background: var(--panel-hover); outline: none; }

/* ---- đường dẫn dính (ancestors của dòng trên cùng) ---- */
.tv-crumb {
  flex: 0 0 auto; height: calc(var(--tv-fs) * 1.6 + 4px); line-height: calc(var(--tv-fs) * 1.6 + 4px); padding: 0 14px; font-size: calc(var(--tv-fs) - 2px); color: var(--tv-muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  background: var(--tv-bg); border-bottom: 1px solid transparent; z-index: 2;
}
.tv-crumb.has { border-bottom-color: var(--border); color: var(--text-soft); }
.tv-crumb span { cursor: pointer; }
.tv-crumb span:hover { color: var(--tv-fg); text-decoration: underline; }
.tv-crumb i { font-style: normal; opacity: .6; margin: 0 5px; }

/* ---- danh sách ---- */
.tv-scroll { flex: 1 1 auto; min-height: 0; overflow: auto; overscroll-behavior: contain; padding: 6px 14px 40px; }
.tv-list { outline: none; min-width: 0; }
.tv-empty { padding: 28px 8px; color: var(--tv-muted); font-family: var(--font-ui); }

.tv-row {
  display: flex; align-items: stretch; position: relative;
  min-height: var(--tv-lh); line-height: var(--tv-lh);
  --bc: var(--tv-line);
}
.tv-list.big .tv-row { content-visibility: auto; contain-intrinsic-size: auto var(--tv-lh); }
.tv-row.sel > .tv-main { background: var(--tv-sel); }
.tv-row:hover > .tv-main { background: color-mix(in srgb, var(--tv-sel) 55%, transparent); }
.tv-row.sel:hover > .tv-main { background: var(--tv-sel); }
.tv-row.drop > .tv-main { outline: 2px dashed var(--accent); outline-offset: -2px; }
.tv-row.drag { opacity: .45; }

/* đường nối: mỗi tầng tổ tiên một ô rộng --tv-ind, ô cuối là khuỷu ├ / └ */
.tv-g, .tv-e { flex: 0 0 var(--tv-ind); width: var(--tv-ind); position: relative; align-self: stretch; }
.tv-g.on::before, .tv-e::before {
  content: ""; position: absolute; left: calc(var(--tv-ind) / 2 - 1px); top: 0; bottom: 0; width: 0;
  border-left: 2px solid var(--bc);
}
.tv-e.last::before { bottom: auto; height: calc(var(--tv-lh) / 2 + 1px); }
.tv-e::after {
  content: ""; position: absolute; left: calc(var(--tv-ind) / 2 - 1px); right: 0; top: calc(var(--tv-lh) / 2 - 1px); height: 0;
  border-top: 2px solid var(--bc);
}

.tv-main { flex: 1 1 auto; min-width: 0; display: flex; align-items: flex-start; gap: 4px; border-radius: 4px; cursor: pointer; padding-right: 4px; }
.tv-arrow, .tv-leaf {
  flex: 0 0 auto; width: 18px; height: var(--tv-lh); display: inline-flex; align-items: center; justify-content: center;
  color: var(--dotc, var(--tv-muted)); font-size: .8em; user-select: none;
}
.tv-arrow { border: 0; background: transparent; cursor: pointer; padding: 0; border-radius: 4px; font-family: inherit; }
.tv-arrow:hover { background: color-mix(in srgb, var(--tv-fg) 12%, transparent); color: var(--tv-fg); }
.tv-arrow:focus-visible { outline: 2px solid var(--accent); }
.tv-leaf::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--dotc, var(--tv-muted)); opacity: .8; }
.tv-ico, .tv-num { flex: none; }

.tv-text {
  flex: 1 1 auto; min-width: 0; color: var(--tv-fg);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tv-list.l2 .tv-text { white-space: normal; overflow-wrap: anywhere; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.tv-list.lf .tv-text, .tv-row.open .tv-text { white-space: pre-wrap; overflow-wrap: anywhere; display: block; overflow: visible; text-overflow: clip; -webkit-line-clamp: unset; }
.tv-row.open .tv-text { animation: tv-open .14s ease-out; }
@keyframes tv-open { from { opacity: .55; } to { opacity: 1; } }
.tv-row.d0 .tv-text { font-weight: 700; }
.tv-row.hit .tv-text { white-space: pre-wrap; overflow-wrap: anywhere; display: block; overflow: visible; }
.tv-num { color: var(--tv-muted); margin-right: .5ch; }
.tv-ico { margin-right: .5ch; }
.tv-text mark { background: var(--tv-hit); color: inherit; border-radius: 2px; padding: 0; }
.tv-more { flex: 0 0 auto; color: var(--tv-muted); }
.tv-bdg { flex: 0 0 auto; display: inline-flex; gap: 3px; font-size: .85em; line-height: var(--tv-lh); }
.tv-bdg span { cursor: help; }
.tv-edit {
  flex: 1 1 auto; min-width: 0; resize: none; overflow: hidden; margin: 0; padding: 0 4px;
  font: inherit; line-height: var(--tv-lh); color: var(--tv-fg); background: var(--panel);
  border: 1px solid var(--accent); border-radius: 4px; outline: none;
}

/* ---- màu nhánh khi map dùng Rainbow ---- */

/* ---- nhỏ hơn 700px: thụt 14px, thanh công cụ 2 hàng, không cuộn ngang ---- */
@media (max-width: 700px) {
  .tv { --tv-ind: 14px; }
  .tv-bar { gap: 6px 10px; padding: 6px 8px; }
  .tv-filter { width: 120px; }
  .tv-scroll { padding: 4px 8px 40px; overflow-x: hidden; }
  .view-toggle button { padding: 5px 8px; }
}

@media print { .tv, .view-toggle { display: none !important; } }
@media (prefers-reduced-motion: reduce) { .tv-row.open .tv-text { animation: none; } }