:root {
  --bg: #071326;
  --panel: #0e1d35;
  --panel-2: #102443;
  --line: #28456f;
  --text: #dce9ff;
  --muted: #97b2d8;
  --accent: #4fa0ff;
  --ok: #49c47c;
  --warn: #e5b94d;
  --bad: #ff7a7a;
  --left: 15%;
  --center: 65%;
  --right: 20%;
  --splitter: 8px;
  --outer-gap: 10px;
  --title-row-h: 34px;
  --control-row-h: 42px;
  --top-control-btn-h: 34px;
  --top-control-font-size: 15px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  overflow: hidden;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top left, #11315f 0%, #091930 30%, var(--bg) 100%);
}

.layout {
  display: grid;
  grid-template-columns:
    calc((100% - (2 * var(--outer-gap)) - (2 * var(--splitter))) * (var(--left) / 100%))
    var(--splitter)
    calc((100% - (2 * var(--outer-gap)) - (2 * var(--splitter))) * (var(--center) / 100%))
    var(--splitter)
    calc((100% - (2 * var(--outer-gap)) - (2 * var(--splitter))) * (var(--right) / 100%));
  height: 100vh;
  min-height: 100vh;
  overflow: hidden;
  padding: 0 var(--outer-gap);
  box-sizing: border-box;
}

.panel {
  padding: 10px;
  display: flex;
  flex-direction: column;
  height: 100%;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  background: linear-gradient(180deg, var(--panel-2) 0%, var(--panel) 100%);
}

#tree-panel,
#editor-panel,
#right-panel {
  min-height: 0;
}

.panel h2 {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
}

.row-header {
  display: flex;
  align-items: center;
  min-height: var(--title-row-h);
  height: var(--title-row-h);
  margin-bottom: 8px;
}

.row-controls {
  display: flex;
  align-items: center;
  min-height: var(--control-row-h);
  height: var(--control-row-h);
  gap: 8px;
  flex-wrap: nowrap;
  margin-bottom: 8px;
}

.row-header h2 {
  line-height: 1;
}

.right-controls {
  justify-content: flex-end;
}

.scroll {
  overflow: auto;
}

#tree-root {
  flex: 1;
  min-height: 200px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px;
  background: #0b1830;
}

.badge {
  padding: 4px 8px;
  border-radius: 999px;
  background: #1b3156;
  border: 1px solid var(--line);
  color: var(--muted);
}

button,
textarea {
  background: #12284b;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
}

button {
  padding: 6px 10px;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

textarea {
  width: 100%;
  padding: 8px;
}

.hidden {
  display: none !important;
}

.picker-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: var(--top-control-btn-h);
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #12284b;
  color: var(--text);
  cursor: pointer;
  font-size: var(--top-control-font-size);
  line-height: 1;
  white-space: nowrap;
}

.picker-label:hover {
  border-color: var(--accent);
}

.picker-input {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.splitter {
  background: linear-gradient(180deg, #1b3c69 0%, #274f86 40%, #1b3c69 100%);
  cursor: col-resize;
}

.splitter:hover {
  filter: brightness(1.2);
}

.tabs-row {
  margin-bottom: 8px;
}

.tabs {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
  overflow-y: hidden;
  white-space: nowrap;
  min-width: 0;
  scrollbar-gutter: stable both-edges;
  scrollbar-width: thin;
  scrollbar-color: #2f5f99 transparent;
}

.tabs::-webkit-scrollbar {
  height: 2px;
}

.tabs::-webkit-scrollbar-track {
  background: transparent;
}

.tabs::-webkit-scrollbar-thumb {
  background: #2f5f99;
  border-radius: 999px;
}

.new-tab-btn {
  flex-shrink: 0;
  height: var(--top-control-btn-h);
  padding: 0 14px;
  font-size: var(--top-control-font-size);
  line-height: 1;
}

.tab-item {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: #12284b;
}

.tab-main {
  display: inline-block;
  flex: 0 0 auto;
  border: none;
  border-right: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--muted);
  padding: 4px 8px;
  white-space: nowrap;
  min-width: max-content;
  max-width: 32ch;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tab-close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 24px;
  border: none;
  border-radius: 0;
  width: 24px;
  min-width: 24px;
  height: 24px;
  padding: 0;
  background: transparent;
  color: var(--text);
  font-weight: 700;
  font-size: 14px;
  line-height: 1;
}

.row-controls > button {
  height: var(--top-control-btn-h);
  padding: 0 14px;
  font-size: var(--top-control-font-size);
  line-height: 1;
  white-space: nowrap;
}

.tab-close:hover,
.tab-main:hover {
  background: #183563;
}

.tab-item.active {
  border-color: var(--accent);
}

.tab-item.active .tab-main {
  color: var(--text);
}

.tab-item.dirty {
  border-color: var(--warn);
}

.tab-item.dirty .tab-main {
  color: #ffd88b;
}

.editor-workspace {
  position: relative;
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.md-toggle {
  position: static;
  z-index: 0;
  width: var(--top-control-btn-h);
  min-width: var(--top-control-btn-h);
  height: var(--top-control-btn-h);
  padding: 0;
  border-radius: 999px;
  font-size: 16px;
  line-height: 1;
  background: #163057;
  flex-shrink: 0;
}

.md-toggle.active {
  border-color: var(--accent);
}

.file-editor {
  background: #0b1830;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px;
  margin: 0;
  color: var(--text);
  resize: none;
  width: 100%;
  font-family: "IBM Plex Mono", "Consolas", monospace;
  font-size: 14px;
  line-height: 1.35;
}

.file-editor:read-only {
  color: var(--muted);
}

.file-editor.large {
  flex: 1;
}

.file-editor.monaco-host {
  padding: 0;
  overflow: hidden;
}

.md-preview {
  background: #0b1830;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px;
  overflow: auto;
}

.md-preview.large {
  flex: 1;
}

.md-preview h1,
.md-preview h2,
.md-preview h3,
.md-preview h4,
.md-preview h5,
.md-preview h6 {
  margin: 10px 0 6px;
  color: #f1f6ff;
}

.md-preview p {
  margin: 6px 0;
}

.md-preview code {
  background: #163057;
  padding: 1px 4px;
  border-radius: 4px;
}

.md-preview pre {
  background: #081427;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px;
  overflow: auto;
}

.md-preview ul {
  margin: 6px 0;
  padding-left: 18px;
}

.md-preview a {
  color: #81b9ff;
}

.editor-footer {
  margin-top: 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #0b1830;
  padding: 8px;
  display: flex;
  height: 56px;
  min-height: 56px;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.editor-info {
  color: var(--muted);
  font-size: 12px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.editor-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.chat-wrap,
.review-wrap {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.chat-wrap {
  flex: 1;
}

.review-wrap {
  flex: 1;
  margin-top: 8px;
}

.chat-log,
.diff-view {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 8px;
  background: #0b1830;
}

.chat-log {
  flex: 1;
  min-height: 0;
  overflow: auto;
}

.chat-entry {
  margin-bottom: 8px;
  padding-bottom: 8px;
  border-bottom: 1px dotted var(--line);
  white-space: pre-wrap;
}

.chat-form {
  margin-top: 8px;
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 8px;
  flex: 0 0 20%;
  min-height: 120px;
}

#chat-input {
  min-height: 0;
  height: 100%;
  resize: none;
  overflow: auto;
}

.change-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0;
}

.change-btn {
  border: 1px solid var(--line);
  background: #12284b;
  color: var(--muted);
  padding: 4px 8px;
  border-radius: 6px;
  cursor: pointer;
}

.change-btn.active {
  border-color: var(--accent);
  color: var(--text);
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.diff-view {
  overflow: auto;
  min-height: 120px;
}

.diff-line {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 8px;
  font-family: "IBM Plex Mono", "Consolas", monospace;
  font-size: 12px;
  padding: 2px 8px;
}

.diff-line.add {
  background: #113224;
}

.diff-line.remove {
  background: #3a2027;
}

.tree-item {
  padding: 2px 4px;
  cursor: pointer;
}

.tree-item:hover {
  background: #133056;
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .splitter {
    display: none;
  }
}