/* Shared semantic colors keep every surface in sync with Monaco. */
:root, :root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #171c23; --surface: #1c222b; --raised: #242c37; --hover: #2d3845;
  --border: #303946; --strong-border: #536174; --text: #dce3eb; --muted: #9caabc;
  --accent: #83d8bd; --accent-text: #a4dccb; --selected: #28483f;
  --input: #151b23; --primary: #83d8bd; --primary-hover: #a3e5d0; --on-primary: #14352b;
  --error: #ffb4a9; --warning: #e7c480; --canvas: #171c23;
  --node: #243440; --node-border: #6e8999; --node-requires: #3b3628;
  --node-operator: #352e48; --node-focus: #b1ead9; --graph-muted: #a0becb; --graph-edge: #8eacb9;
  --shadow: 0 12px 40px #0003;
}
:root[data-theme="light"] {
  color-scheme: light;
  --bg: #ffffff; --surface: #f5f6f4; --raised: #ffffff; --hover: #e9efeb;
  --border: #dce2df; --strong-border: #a4b2ad; --text: #243347; --muted: #5c6b78;
  --accent: #176e59; --accent-text: #216b59; --selected: #dceee5;
  --input: #ffffff; --primary: #216e58; --primary-hover: #185844; --on-primary: #ffffff;
  --error: #b02c28; --warning: #825900; --canvas: #fbfcfa;
  --node: #edf3f7; --node-border: #8a9eaa; --node-requires: #fbf2db;
  --node-operator: #efe8fa; --node-focus: #176e59; --graph-muted: #516b78; --graph-edge: #6b8390;
  --shadow: 0 12px 40px #233b2814;
}
:root { font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; color: var(--text); background: var(--bg); font-synthesis: none;  }
* { box-sizing: border-box; }
body { margin: 0; }
button, input { font: inherit; }
button { color: var(--text); background: var(--raised); border: 1px solid var(--border); border-radius: 5px; padding: 7px 11px; cursor: pointer; }
button:hover { background: var(--hover); }
button:disabled { opacity: .45; cursor: default; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.primary { background: var(--primary); color: var(--on-primary); border-color: var(--primary); font-weight: 600; }
.primary:hover { background: var(--primary-hover); }
[hidden] { display: none !important; }
#app { height: 100vh; display: grid; grid-template-rows: 58px minmax(0, 1fr) 29px; }
header { display: flex; align-items: center; gap: 28px; padding: 0 18px; border-bottom: 1px solid var(--border); background: var(--surface); }
.brand { color: var(--accent); font-size: 25px; font-weight: 750; letter-spacing: -1px; display: flex; align-items: center; gap: 12px; }
.brand span { font-size: 9px; letter-spacing: 1.8px; color: var(--muted); font-weight: 500; }
#project-name { flex: 1; color: var(--muted); font-size: 13px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
main { display: grid; grid-template-columns: clamp(250px, 27vw, 390px) minmax(0, 1fr); min-height: 0; }
aside { background: var(--surface); border-right: 1px solid var(--border); min-height: 0; display: flex; flex-direction: column; }
nav { display: flex; border-bottom: 1px solid var(--border); }
nav button { background: none; border: none; border-radius: 0; border-bottom: 2px solid transparent; padding: 13px 22px; color: var(--muted); }
nav button.active { color: var(--accent); border-bottom-color: var(--accent); }
#files-panel, #search-panel { overflow: auto; min-height: 0; }
.panel-heading { display: flex; align-items: center; justify-content: space-between; color: var(--muted); letter-spacing: 1.4px; font-size: 10px; padding: 8px 12px; }
.panel-heading button { border: none; background: none; font-size: 20px; padding: 0 6px; }
.tree-row { display: block; width: 100%; text-align: left; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; border: 0; border-radius: 0; background: none; font-size: 13px; line-height: 20px; padding-top: 4px; padding-bottom: 4px; }
.tree-row.selected { background: var(--selected); color: var(--accent-text); }
#tree > .hint { padding: 0 14px; }
.code-pane { position: relative; min-width: 0; min-height: 0; display: grid; grid-template-rows: 45px minmax(0, 1fr); }
#file-bar { display: flex; align-items: center; gap: 14px; padding: 0 16px; background: var(--raised); border-bottom: 1px solid var(--border); font-size: 12px; }
#file-path { flex: 1; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.badge { font-size: 9px; letter-spacing: 1px; color: var(--accent-text); white-space: nowrap; }
#find-file { font-size: 11px; padding: 4px 8px; }
#editor { min-height: 0; min-width: 0; }
#welcome { position: absolute; inset: 45px 0 0; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; background: var(--bg); padding: 24px; }
.welcome-mark { font-family: monospace; font-size: 44px; color: var(--accent); }
h1 { font-size: 29px; font-weight: 550; margin-bottom: 0; }
#welcome p { color: var(--muted); line-height: 1.8; margin: 18px 0 26px; }
#welcome small { color: var(--muted); font-size: 11px; margin-top: 30px; max-width: 350px; line-height: 1.7; }
footer { display: flex; justify-content: space-between; gap: 16px; padding: 6px 12px; border-top: 1px solid var(--border); color: var(--muted); background: var(--surface); font-size: 11px; }
#status { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#cursor { white-space: nowrap; }
#search-panel { padding: 14px 12px; }
label { display: block; font-size: 12px; margin-bottom: 8px; }
input:not([type=checkbox]) { width: 100%; min-width: 0; background: var(--input); border: 1px solid var(--strong-border); color: var(--text); padding: 9px 10px; border-radius: 5px; font-size: 13px; }
.search-actions { display: flex; align-items: center; justify-content: space-between; margin-top: 9px; font-size: 11px; color: var(--muted); }
.search-actions button { padding: 3px 6px; font-size: 11px; }
.hint { color: var(--muted); font-size: 12px; line-height: 1.6; }
.result { display: block; width: 100%; text-align: left; background: none; border: none; border-bottom: 1px solid var(--border); border-radius: 0; padding: 10px 2px; overflow: hidden; }
.result strong { display: block; font-size: 12px; font-weight: 500; color: var(--accent-text); overflow-wrap: anywhere; }
.result span { display: block; font-family: monospace; font-size: 12px; white-space: pre; overflow: hidden; text-overflow: ellipsis; margin-top: 7px; color: var(--muted); }
dialog { width: min(650px, 90vw); background: var(--raised); color: var(--text); border: 1px solid var(--strong-border); border-radius: 12px; padding: 28px; box-shadow: 0 24px 100px #0008; }
dialog::backdrop { background: #080c12b8; }
h2 { font-weight: 550; margin-top: 0; }
.field-row { display: flex; gap: 8px; }
.field-row button { flex-shrink: 0; }
.optional { color: var(--muted); font-weight: normal; margin-left: 7px; }
.reset-label { display: flex; align-items: center; gap: 9px; margin-top: 24px; line-height: 1.5; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 22px; }
.error { color: var(--error); }
#setup-error { font-size: 12px; line-height: 1.6; overflow-wrap: anywhere; }
/* Navigation is a separate service; text search exclusions never filter symbols. */
nav button { padding-left: 15px; padding-right: 15px; font-size: 13px; }
.code-pane { grid-template-rows: 45px 37px minmax(0, 1fr); }
#welcome { top: 82px; }
#navigation-bar { display: flex; gap: 5px; align-items: center; padding: 0 10px; background: var(--surface); border-bottom: 1px solid var(--border); min-width: 0; }
#navigation-bar button { font-size: 11px; padding: 4px 7px; white-space: nowrap; }
#analysis-state { margin-left: auto; color: var(--accent-text); overflow: hidden; text-overflow: ellipsis; }
#navigation-panel { padding: 10px 12px; overflow: auto; min-height: 0; }
#navigation-panel .panel-heading { padding: 0; }
#navigation-panel .panel-heading button { font-size: 11px; letter-spacing: normal; border: 1px solid var(--border); padding: 5px 8px; }
#navigation-title { font-size: 14px; font-weight: 550; overflow-wrap: anywhere; }
#analysis-detail, #navigation-summary, #navigation-evidence { overflow-wrap: anywhere; }
#navigation-evidence { font-size: 11px; margin-top: 22px; }
.type-info { font-family: monospace; font-size: 12px; white-space: pre-wrap; overflow-wrap: anywhere; color: var(--accent-text); }
.exclusions-label { margin-top: 15px; }
textarea { width: 100%; resize: vertical; color: var(--text); background: var(--input); border: 1px solid var(--strong-border); border-radius: 5px; padding: 8px; font: 12px monospace; }
#apply-exclusions { margin-top: 6px; font-size: 11px; }
#exclusion-status:empty { display: none; }
main.explaining { grid-template-columns: minmax(210px, 22vw) minmax(300px, 1fr) minmax(380px, 35vw); }
#explanation-pane { min-height: 0; min-width: 0; display: flex; flex-direction: column; border-left: 1px solid var(--border); background: var(--surface); }
.explanation-heading { display: flex; align-items: center; gap: 8px; padding: 11px 13px; border-bottom: 1px solid var(--border); }
.explanation-heading strong { flex: 1; font-size: 14px; }
.explanation-heading button { font-size: 11px; }
.explanation-content { padding: 12px 15px 24px; overflow: auto; min-height: 0; }
.explanation-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.explanation-actions button { font-size: 12px; }
#explain-destination, #explain-status { overflow-wrap: anywhere; }
#context-details { padding: 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 12px; }
#context-details summary { cursor: pointer; line-height: 1.6; overflow-wrap: anywhere; }
#context-sources details { margin: 8px 0; }
#context-details pre { max-height: 300px; overflow: auto; white-space: pre-wrap; overflow-wrap: anywhere; padding: 8px; background: var(--input); font-size: 11px; }
#explanation-answer { font-size: 14px; line-height: 1.7; overflow-wrap: anywhere; }
#explanation-answer pre { padding: 10px; overflow: auto; background: var(--input); border-radius: 5px; font-size: 12px; }
#explanation-answer code { font-size: 12px; }
#explanation-answer h1 { font-size: 21px; }
#explanation-answer h2 { font-size: 18px; margin-top: 22px; }
#explanation-answer h3 { font-size: 16px; }
#explanation-answer table { display: block; overflow: auto; border-collapse: collapse; }
#explanation-answer td, #explanation-answer th { padding: 6px; border: 1px solid var(--border); }
.source-citation { color: var(--accent-text); border: 0; background: var(--selected); padding: 1px 5px; font-size: 11px; vertical-align: baseline; }
#llm-settings { max-height: 90vh; overflow: auto; }
#llm-settings label { margin-top: 13px; }
#llm-settings .reset-label { margin-top: 10px; }
#llm-settings select { width: 100%; padding: 8px; font: inherit; font-size: 13px; background: var(--input); color: var(--text); border: 1px solid var(--strong-border); border-radius: 5px; }
.model-presets { display: flex; gap: 8px; margin-bottom: 12px; }
.model-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
@media (max-width: 1100px) {
  main.explaining { grid-template-columns: clamp(250px, 27vw, 390px) minmax(0, 1fr); }
  #explanation-pane { position: fixed; right: 0; top: 58px; bottom: 29px; width: min(520px, 85vw); z-index: 10; box-shadow: -10px 0 40px #0006; }
}

#callee-options { border: 1px solid var(--border, var(--border)); border-radius: 5px; margin: 12px 0; padding: 10px; min-width: 0; }
#callee-options select { width: 100%; }
#callee-list { max-height: 180px; overflow: auto; margin: 8px 0; }
#callee-list label { display: block; overflow-wrap: anywhere; font-size: 12px; margin: 6px 0; }
#context-size-warning { color: var(--warning); }

#vim-status { color: var(--accent); font-size: 11px; white-space: nowrap; }
#navigation-results .result.selected { background: var(--selected); border-left: 2px solid var(--accent); }

main { position: relative; }
main.landing > aside, main.landing > .code-pane { visibility: hidden; }
#landing { position: absolute; inset: 0; z-index: 5; overflow: auto; padding: 40px max(28px, calc((100% - 860px) / 2)); background: var(--surface); }
.landing-intro { margin-bottom: 32px; }
.landing-intro h1 { margin: 12px 0; }
.landing-intro p { color: var(--muted); }
.recent-heading { display: flex; align-items: center; justify-content: space-between; }
.recent-heading h2 { font-size: 16px; font-weight: 500; }
#recent-projects { margin: 16px 0 24px; }
.recent-row { display: flex; align-items: stretch; margin-bottom: 8px; gap: 8px; }
.recent-project { flex: 1; min-width: 0; text-align: left; padding: 14px 16px; }
.recent-project strong, .recent-project span, .recent-project small { display: block; overflow-wrap: anywhere; }
.recent-project span { color: var(--muted); margin: 5px 0; font-size: 12px; }
.recent-project small { color: var(--muted); font-size: 11px; }
.recent-remove { align-self: center; font-size: 20px; }

.sidebar-tabs { display: flex; align-items: center; justify-content: space-between; padding: 6px 10px; border-bottom: 1px solid var(--border); }
.sidebar-tabs [role=tablist] { display: flex; gap: 6px; }
.sidebar-tabs [aria-selected=true] { background: var(--selected); color: var(--accent); }
#chat-panel, #graph-panel { min-height: 0; display: flex; flex-direction: column; flex: 1; overflow: hidden; }
#graph-panel { padding: 10px; gap: 8px; }
.graph-tools { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.graph-tools button { font-size: 11px; }
#graph-status { margin: 0; }
#graph-canvas { min-height: 240px; flex: 1; overflow: auto; background: var(--canvas); border: 1px solid var(--border); }
#graph-canvas svg { display: block; }
.graph-node { cursor: pointer; }
.graph-node rect { fill: var(--node); stroke: var(--node-border); }
.graph-node.selected rect { fill: var(--selected); stroke: var(--accent); stroke-width: 2; }
.graph-node.requires rect { fill: var(--node-requires); }
.graph-node.operator rect { fill: var(--node-operator); }
.graph-node:focus rect, .graph-node:hover rect { stroke: var(--node-focus); stroke-width: 3; }
.graph-node text { fill: var(--text); font-size: 12px; font-family: monospace; }
.graph-node .graph-kind { fill: var(--graph-muted); font-size: 10px; }
.graph-edge-label { fill: var(--graph-muted); font-size: 11px; }
#graph-detail { max-height: 170px; overflow: auto; }
#graph-detail pre { white-space: pre-wrap; overflow-wrap: anywhere; margin: 0 0 8px; }
#graph-detail button { font-size: 11px; margin-right: 8px; }
#graph-warnings { max-height: 85px; overflow: auto; font-size: 11px; }
#graph-warnings p { margin: 0 0 6px; }

/* Quiet chrome, with emphasis reserved for selection and primary actions. */
body { font-size: 13px; }
button, input, textarea, select { transition: background-color 120ms, border-color 120ms; }
button { border-radius: 6px; font-size: 12px; }
button:disabled:hover { background: inherit; }
button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
select { font: inherit; font-size: 12px; color: var(--text); background: var(--input); border: 1px solid var(--strong-border); padding: 6px 8px; border-radius: 6px; }
input::placeholder, textarea::placeholder { color: var(--muted); opacity: .85; }
input[type=checkbox] { accent-color: var(--accent); }
header { gap: 12px; }
.brand { margin-right: 20px; font-size: 24px; }
.brand span { letter-spacing: 1.6px; }
#theme-select { width: 83px; border-color: transparent; background-color: transparent; color: var(--muted); cursor: pointer; }
#theme-select:hover { background: var(--hover); }
.icon-button { display: inline-flex; align-items: center; justify-content: center; width: 28px; height: 28px; padding: 3px; border-color: transparent; background: transparent; color: var(--muted); flex-shrink: 0; }
.icon-button:hover { background: var(--hover); color: var(--text); }
.icon-button[aria-expanded=true] { color: var(--accent); background: var(--selected); }
#close-explanation { font-size: 20px; }
#workspace-button { padding: 6px 10px; }
main { grid-template-columns: clamp(230px, 22vw, 320px) minmax(0, 1fr); }
main.explaining { grid-template-columns: minmax(210px, 19vw) minmax(300px, 1fr) minmax(370px, 33vw); }
nav button { padding: 12px 14px; font-size: 12px; }
nav button:hover { background: var(--hover); }
.tree-row { width: calc(100% - 12px); margin: 1px 6px; border-radius: 5px; }
#file-bar { background: var(--bg); gap: 10px; }
.badge { font-size: 9px; padding: 3px 6px; border: 1px solid var(--border); border-radius: 4px; }
#navigation-bar { overflow-x: auto; scrollbar-width: thin; }
#navigation-bar button { border-color: transparent; background: transparent; }
#navigation-bar button:not(:disabled):hover { background: var(--hover); }
#analysis-state { min-width: 90px; }
.sidebar-tabs { padding: 7px 10px; }
.sidebar-tabs [role=tablist] { background: var(--input); padding: 3px; border-radius: 7px; gap: 2px; }
.sidebar-tabs [role=tab] { padding: 5px 16px; border: 0; color: var(--muted); background: transparent; }
.sidebar-tabs [aria-selected=true] { background: var(--selected); color: var(--accent); }
.explanation-heading { padding: 12px 15px; }
.explanation-heading strong { font-size: 13px; }
#model-settings, #refresh-recents { background: transparent; border-color: transparent; color: var(--muted); }
#model-settings:hover, #refresh-recents:hover { background: var(--hover); }
#context-details, #callee-options { background: var(--bg); border-radius: 8px; }
#graph-canvas { border-radius: 8px; background-image: radial-gradient(var(--border) .7px, transparent .7px); background-size: 16px 16px; }
#landing { background: var(--surface); padding-top: clamp(36px, 7vh, 80px); }
.landing-intro { margin-bottom: 44px; }
.landing-intro .welcome-mark { font-size: 32px; }
.landing-intro h1 { font-size: 32px; letter-spacing: -.8px; margin-top: 20px; }
.landing-intro p { margin: 12px 0 24px; line-height: 1.6; }
.recent-project { background: var(--bg); border-color: var(--border); border-radius: 9px; padding: 16px 18px; }
.recent-project:hover { border-color: var(--strong-border); background: var(--hover); }
.recent-project strong { font-size: 14px; font-weight: 600; }
.recent-remove { border-color: transparent; background: transparent; color: var(--muted); padding: 3px 8px; }
dialog { background: var(--surface); border-color: var(--border); box-shadow: var(--shadow); }
#explanation-answer blockquote { margin-left: 0; padding-left: 14px; border-left: 3px solid var(--border); color: var(--muted); }
@media (max-width: 1100px) {
  main.explaining { grid-template-columns: clamp(230px, 22vw, 320px) minmax(0, 1fr); }
  #explanation-pane { box-shadow: var(--shadow); }
}
@media (prefers-reduced-motion: reduce) {
  button, input, textarea, select { transition: none; }
}

#graph-title { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#graph-options { border: 1px solid var(--border); border-radius: 7px; padding: 8px 10px; font-size: 12px; max-height: 240px; overflow: auto; flex-shrink: 0; }
#graph-options summary { cursor: pointer; }
#graph-options-summary { color: var(--muted); font-size: 11px; }
#graph-options label { margin-top: 12px; }
#graph-exclusions { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 8px; }
#graph-exclusions button { background: var(--selected); color: var(--accent-text); border: 0; padding: 4px 8px; }
#graph-apply { margin-top: 10px; }
#graph-options-status:empty { display: none; }
#graph-canvas { cursor: grab; min-height: 180px; overscroll-behavior: contain; touch-action: none; }
#graph-canvas.dragging { cursor: grabbing; user-select: none; }
#graph-canvas svg { margin-inline: auto; }
.graph-node.focused rect { stroke: var(--node-focus); stroke-width: 3; }
.graph-node.function rect { fill: var(--node); }
#graph-warning-details { font-size: 11px; flex-shrink: 0; color: var(--muted); }
#graph-warning-details summary { cursor: pointer; }
#graph-warnings { padding-top: 8px; }
#graph-zoom { margin-left: auto; font-variant-numeric: tabular-nums; }
#explanation-pane.graph-expanded { position: fixed; z-index: 15; right: 0; top: 58px; bottom: 29px; width: min(1050px, 94vw); box-shadow: var(--shadow); }