/* =========================================================
   Novelforge · 小说锻造厂 — demo dashboard
   Vision: an "archive console". Dark ink, warm amber accent,
   hairline borders, Fraunces display for "档案" gravitas,
   JetBrains Mono for the LLM receipts.
   ========================================================= */

:root {
  --ink:        #0a0e14;
  --ink-2:      #0f141c;
  --panel:      #141922;
  --panel-2:    #1a2030;
  --line:       #232a36;
  --line-soft:  #1c2230;
  --text:       #e6edf3;
  --text-dim:   #9aa5b5;
  --text-soft:  #64707f;
  --amber:      #ffb454;
  --amber-dim:  #d48a2a;
  --cyan:       #7fdbff;
  --green:      #62d97a;
  --red:        #f85149;
  --red-soft:   #ff8a80;

  /* agent palette */
  --ag-planner:         #5aa7ff;
  --ag-generator:       #62d97a;
  --ag-evaluator:       #f85149;
  --ag-fixer:           #ffb454;
  --ag-summarizer:      #9aa5b5;
  --ag-ai_slop_guard:   #b78dff;
  --ag-character_guard: #3dd5c8;

  --radius: 7px;
  --radius-sm: 4px;
  --font-ui:    'Inter Tight', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono:  'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  --font-display: 'Fraunces', 'Times New Roman', serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.5;
  overflow: hidden;
  height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Background: subtle noise + radial warm glow top-left */
body::before {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(255, 180, 84, 0.06), transparent 60%),
    radial-gradient(700px 400px at 100% 110%, rgba(127, 219, 255, 0.04), transparent 55%);
  z-index: 0;
}

button { font-family: inherit; cursor: pointer; }
a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

/* =========================================================
   TOP BAR
   ========================================================= */
.topbar {
  position: relative; z-index: 5;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #0d131c 0%, #0a0e14 100%);
}

.brand {
  display: flex; align-items: center; gap: 12px;
}
.brand-mark {
  font-family: var(--font-display);
  font-size: 28px;
  color: var(--amber);
  line-height: 1;
  text-shadow: 0 0 24px rgba(255, 180, 84, 0.5);
}
.brand-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 19px;
  letter-spacing: -0.01em;
  line-height: 1.1;
  color: var(--text);
}
.brand-sub {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-soft);
  letter-spacing: 0.02em;
  margin-top: 2px;
}

/* pills */
.pills {
  display: flex; flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}
.pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px 4px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text);
  white-space: nowrap;
}
.pill-label {
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 10px;
}
.pill-running {
  border-color: var(--amber-dim);
  background: rgba(255, 180, 84, 0.07);
}
.pill-running .pill-label { color: var(--amber); }
.pill-debt-hot { border-color: var(--red); background: rgba(248, 81, 73, 0.08); }

/* buttons */
.actions { display: flex; gap: 8px; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  font-size: 13px;
  font-weight: 500;
  transition: all 0.15s ease;
  letter-spacing: 0.005em;
}
.btn:hover:not(:disabled) {
  border-color: var(--amber-dim);
  background: var(--panel-2);
  color: var(--amber);
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; }
.btn-glyph { font-size: 10px; opacity: 0.8; }
.btn-primary {
  background: linear-gradient(180deg, rgba(255, 180, 84, 0.15), rgba(255, 180, 84, 0.06));
  border-color: var(--amber-dim);
  color: var(--amber);
}
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(180deg, rgba(255, 180, 84, 0.25), rgba(255, 180, 84, 0.1));
  color: #fff;
}
.btn-ghost { background: transparent; }

/* =========================================================
   GRID
   ========================================================= */
.grid {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 260px 1fr 420px;
  height: calc(100vh - 64px);
  min-height: 0;
}
.col {
  display: flex; flex-direction: column;
  min-height: 0;
  background: var(--ink-2);
}
.col-left   { border-right: 1px solid var(--line); }
.col-right  { border-left:  1px solid var(--line); background: #0c111a; }

.col-header {
  display: flex; align-items: baseline; justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-soft);
}
.col-title {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
}
.col-hint {
  font-size: 10.5px;
  color: var(--text-soft);
  font-family: var(--font-mono);
}

/* =========================================================
   LEFT TREE
   ========================================================= */
.tree {
  flex: 1;
  overflow-y: auto;
  padding: 8px 6px 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.tree-empty {
  padding: 16px;
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: 12px;
}
.tree-group { margin: 4px 0; }
.tree-group-label {
  display: flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  color: var(--text-dim);
  cursor: pointer;
  user-select: none;
  border-radius: var(--radius-sm);
}
.tree-group-label:hover { background: var(--panel); color: var(--text); }
.tree-group-label.is-open .tree-caret { transform: rotate(90deg); }
.tree-caret {
  display: inline-block;
  width: 10px;
  color: var(--text-soft);
  font-size: 9px;
  transition: transform 0.15s;
}
.tree-group-name { flex: 1; }
.tree-group-count {
  font-size: 10px;
  color: var(--text-soft);
}
.tree-items {
  margin-left: 12px;
  border-left: 1px dashed var(--line-soft);
  padding-left: 6px;
}
.tree-item {
  display: flex; align-items: center; gap: 8px;
  padding: 3px 10px 3px 8px;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  cursor: pointer;
  transition: background 0.1s;
}
.tree-item:hover {
  background: var(--panel);
  color: var(--text);
}
.tree-item.is-active {
  background: rgba(255, 180, 84, 0.12);
  color: var(--amber);
  border-left: 2px solid var(--amber);
  padding-left: 6px;
}
.tree-item.is-missing {
  color: var(--text-soft);
  font-style: italic;
  opacity: 0.55;
  cursor: not-allowed;
}
.tree-item-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tree-item-size { font-size: 10px; color: var(--text-soft); }
.tree-item-icon { font-size: 10px; width: 10px; text-align: center; opacity: 0.7; }
.tree-section-header {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-soft);
  padding: 14px 16px 4px;
  margin-top: 4px;
  border-top: 1px solid var(--line-soft);
}
.tree-section-header:first-child { border-top: 0; margin-top: 0; }

.tree-legend {
  padding: 10px 16px;
  border-top: 1px solid var(--line-soft);
}
.legend-note {
  font-size: 11px;
  color: var(--text-soft);
  line-height: 1.5;
  font-family: var(--font-mono);
}

/* =========================================================
   TABS
   ========================================================= */
.tabs {
  display: flex;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
  background: #0d121a;
  padding: 0 12px;
  gap: 2px;
}
.tab {
  background: transparent;
  border: 0;
  border-bottom: 2px solid transparent;
  padding: 11px 14px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: color 0.1s, border-color 0.1s;
}
.tab:hover { color: var(--text); }
.tab-active {
  color: var(--amber);
  border-bottom-color: var(--amber);
}
.tab-spacer { flex: 1; }
.tab-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 1px 6px;
  background: var(--red);
  color: #fff;
  border-radius: 10px;
  font-size: 10px;
  letter-spacing: 0;
  min-width: 18px;
  text-align: center;
}
.tab-badge:empty { display: none; }
.viewer-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-soft);
  align-self: center;
  padding-right: 12px;
}

.tab-body {
  flex: 1;
  min-height: 0;
  position: relative;
  overflow: hidden;
}
.tab-pane {
  position: absolute; inset: 0;
  display: none;
  overflow-y: auto;
}
.tab-pane-active { display: block; }

/* =========================================================
   CENTER VIEWER
   ========================================================= */
.viewer {
  padding: 28px 40px 60px;
  max-width: 780px;
  margin: 0 auto;
  color: var(--text);
}
.viewer h1, .viewer h2, .viewer h3 {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-top: 1.5em;
}
.viewer h1 {
  font-size: 28px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
  color: var(--amber);
}
.viewer h2 { font-size: 22px; }
.viewer h3 { font-size: 17px; color: var(--cyan); }
.viewer p { margin: 0 0 1em; line-height: 1.8; font-size: 15px; }
.viewer em { color: var(--text-dim); font-style: italic; }
.viewer strong { color: var(--amber); font-weight: 600; }
.viewer blockquote {
  border-left: 3px solid var(--amber-dim);
  margin: 1em 0;
  padding: 4px 16px;
  color: var(--text-dim);
  background: rgba(255, 180, 84, 0.04);
}
.viewer code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--panel);
  border: 1px solid var(--line);
  padding: 1px 6px;
  border-radius: 3px;
  color: var(--cyan);
}
.viewer pre {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text);
}
.viewer pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: inherit;
}
.viewer ul, .viewer ol { padding-left: 24px; }
.viewer li { margin: 0.25em 0; }
.viewer hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 2em 0;
}
.viewer table {
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 13px;
}
.viewer th, .viewer td {
  border: 1px solid var(--line);
  padding: 6px 10px;
  text-align: left;
}
.viewer th { background: var(--panel); font-weight: 600; }

.viewer-source {
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text);
  padding: 24px 32px;
  white-space: pre-wrap;
  word-break: break-word;
  max-width: none;
  margin: 0;
}
.viewer-source .src-key    { color: var(--cyan); }
.viewer-source .src-string { color: var(--amber); }
.viewer-source .src-num    { color: var(--ag-generator); }
.viewer-source .src-null   { color: var(--ag-summarizer); }
.viewer-source .src-bool   { color: var(--ag-ai_slop_guard); }

/* placeholder */
.placeholder {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-soft);
  min-height: 300px;
}
.placeholder-mark {
  font-family: var(--font-display);
  font-size: 64px;
  color: var(--amber);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: 16px;
}
.placeholder-title {
  font-size: 14px;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-bottom: 6px;
}
.placeholder-sub {
  font-size: 12px;
  color: var(--text-soft);
  line-height: 1.7;
}

/* =========================================================
   DEBT TABLE
   ========================================================= */
.debt-view { padding: 20px; }
.debt-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.debt-table th {
  text-align: left;
  padding: 10px 14px;
  background: var(--panel-2);
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  border-bottom: 1px solid var(--line);
}
.debt-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}
.debt-table tr:last-child td { border-bottom: 0; }
.debt-landmines { font-family: var(--font-mono); font-size: 11.5px; }
.debt-landmine-pill {
  display: inline-block;
  background: rgba(248, 81, 73, 0.12);
  border: 1px solid rgba(248, 81, 73, 0.3);
  color: var(--red-soft);
  padding: 1px 7px;
  border-radius: 10px;
  margin: 2px 4px 2px 0;
  font-size: 11px;
}
.debt-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 14px;
}
.debt-empty-mark {
  font-size: 40px;
  margin-bottom: 10px;
}

/* =========================================================
   RIGHT: PROMPT INSPECTOR (the money shot)
   ========================================================= */
.tabs-right { padding: 0 10px; }
.tab-body-right { display: flex; flex-direction: column; }
.live-dot {
  align-self: center;
  width: 8px; height: 8px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--green);
  animation: pulse 1.8s ease-in-out infinite;
  margin-right: 6px;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.4; transform: scale(0.8); }
}

.inspector-hint {
  padding: 10px 14px;
  margin: 10px 10px 6px;
  border: 1px solid rgba(255, 180, 84, 0.25);
  background: rgba(255, 180, 84, 0.05);
  border-radius: var(--radius);
  font-size: 11.5px;
  line-height: 1.5;
}
.inspector-hint strong {
  color: var(--amber);
  font-weight: 600;
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.inspector-hint span { color: var(--text-dim); font-family: var(--font-mono); font-size: 11px; }

.inspector {
  flex: 1;
  overflow-y: auto;
  padding: 6px 10px 40px;
  position: relative;
}

/* timeline gutter line */
.inspector::before {
  content: '';
  position: absolute;
  left: 21px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent 0%, var(--line) 12%, var(--line) 88%, transparent 100%);
}

/* card */
.insp-card {
  position: relative;
  margin: 6px 0 6px 30px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.15s;
}
.insp-card:hover { border-color: var(--line); }
.insp-card.is-open {
  border-color: var(--amber-dim);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

/* dot on gutter */
.insp-dot {
  position: absolute;
  left: -24px;
  top: 14px;
  width: 12px; height: 12px;
  border-radius: 50%;
  border: 2px solid var(--ink-2);
  background: var(--ag-summarizer);
  z-index: 2;
}
.insp-card.is-open .insp-dot {
  box-shadow: 0 0 0 3px rgba(255, 180, 84, 0.25);
}

.insp-head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 10px;
  align-items: center;
  padding: 10px 12px;
  cursor: pointer;
}
.insp-head:hover { background: rgba(255, 255, 255, 0.015); }
.insp-row-1 { display: flex; align-items: center; gap: 8px; min-width: 0; }
.insp-agent {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text);
}
.insp-chapter {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-soft);
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: 1px 6px;
  border-radius: 3px;
}
.insp-err {
  color: var(--red);
  font-size: 10px;
  font-family: var(--font-mono);
  padding: 1px 6px;
  border: 1px solid var(--red);
  border-radius: 3px;
}
.insp-time {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-soft);
  justify-self: end;
}
.insp-row-2 {
  display: flex; gap: 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--text-soft);
  grid-column: 1 / -1;
}
.insp-metric { display: inline-flex; gap: 4px; }
.insp-metric-label { color: var(--text-soft); opacity: 0.7; }
.insp-metric-value { color: var(--text-dim); }

.insp-body {
  display: none;
  padding: 0 12px 14px;
  border-top: 1px solid var(--line-soft);
  margin-top: 4px;
  padding-top: 10px;
}
.insp-card.is-open .insp-body { display: block; }

.insp-callout {
  background: linear-gradient(90deg, rgba(255, 180, 84, 0.08), rgba(255, 180, 84, 0.02));
  border-left: 3px solid var(--amber);
  padding: 8px 12px;
  margin: 8px 0 12px;
  font-size: 12px;
  color: var(--text-dim);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-family: var(--font-mono);
}
.insp-callout strong { color: var(--amber); }

.insp-section {
  margin-top: 10px;
}
.insp-section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-soft);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.insp-section-tag {
  background: var(--ink-2);
  color: var(--text-dim);
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 9.5px;
}
.insp-pre {
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.55;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  color: var(--text);
  max-height: 260px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
.insp-pre-sys    { border-left: 3px solid var(--amber-dim); }
.insp-pre-user   { border-left: 3px solid var(--cyan); }
.insp-pre-output { border-left: 3px solid var(--green); }

.insp-inputs {
  display: flex; flex-wrap: wrap; gap: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
}
.insp-input-chip {
  background: var(--ink-2);
  border: 1px solid var(--line);
  padding: 2px 7px;
  border-radius: 3px;
  color: var(--cyan);
  cursor: pointer;
  transition: all 0.1s;
}
.insp-input-chip:hover {
  background: var(--panel-2);
  border-color: var(--cyan);
}

.insp-meta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 6px;
}
.insp-meta-grid > span:nth-child(odd) { color: var(--text-soft); }

/* agent color helpers — generated via .ag-* class */
.ag-planner         { background: var(--ag-planner); }
.ag-generator       { background: var(--ag-generator); }
.ag-evaluator       { background: var(--ag-evaluator); }
.ag-fixer           { background: var(--ag-fixer); }
.ag-summarizer      { background: var(--ag-summarizer); }
.ag-ai_slop_guard   { background: var(--ag-ai_slop_guard); }
.ag-character_guard { background: var(--ag-character_guard); }

.insp-agent-planner         { color: var(--ag-planner); }
.insp-agent-generator       { color: var(--ag-generator); }
.insp-agent-evaluator       { color: var(--ag-evaluator); }
.insp-agent-fixer           { color: var(--ag-fixer); }
.insp-agent-summarizer      { color: var(--ag-summarizer); }
.insp-agent-ai_slop_guard   { color: var(--ag-ai_slop_guard); }
.insp-agent-character_guard { color: var(--ag-character_guard); }

/* =========================================================
   LOG (dense view)
   ========================================================= */
.log-view {
  flex: 1;
  overflow-y: auto;
  padding: 4px 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
}
.log-row {
  display: grid;
  grid-template-columns: 4px 62px 96px 50px 56px 1fr;
  gap: 8px;
  align-items: center;
  padding: 4px 12px;
  border-bottom: 1px solid var(--line-soft);
  cursor: pointer;
}
.log-row:hover { background: var(--panel); }
.log-bar { width: 3px; height: 14px; border-radius: 2px; }
.log-bar.ag-planner         { background: var(--ag-planner); }
.log-bar.ag-generator       { background: var(--ag-generator); }
.log-bar.ag-evaluator       { background: var(--ag-evaluator); }
.log-bar.ag-fixer           { background: var(--ag-fixer); }
.log-bar.ag-summarizer      { background: var(--ag-summarizer); }
.log-bar.ag-ai_slop_guard   { background: var(--ag-ai_slop_guard); }
.log-bar.ag-character_guard { background: var(--ag-character_guard); }
.log-time { color: var(--text-soft); font-size: 10.5px; }
.log-agent { font-weight: 600; }
.log-ch { color: var(--text-soft); }
.log-lat { color: var(--text-dim); text-align: right; }
.log-tok { color: var(--text-dim); }
.log-err { color: var(--red); }

/* =========================================================
   TOAST
   ========================================================= */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--panel);
  border: 1px solid var(--amber-dim);
  color: var(--amber);
  padding: 10px 16px;
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 12px;
  z-index: 100;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
  max-width: 360px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}
.toast.is-show {
  opacity: 1;
  transform: translateY(0);
}
.toast.is-error {
  border-color: var(--red);
  color: var(--red-soft);
}

/* =========================================================
   SCROLLBARS
   ========================================================= */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: #242b39;
  border-radius: 4px;
  border: 2px solid var(--ink-2);
}
::-webkit-scrollbar-thumb:hover { background: #2f3847; }

/* =========================================================
   LESSONS PANEL (architecture story · pitch crosswalk)
   ========================================================= */
.lessons-hint {
  padding: 10px 14px;
  margin: 10px 10px 6px;
  border: 1px solid rgba(255, 180, 84, 0.25);
  background: rgba(255, 180, 84, 0.05);
  border-radius: var(--radius);
  font-size: 11.5px;
  line-height: 1.5;
}
.lessons-hint strong {
  color: var(--amber);
  font-weight: 600;
  display: block;
  margin-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.lessons-hint span { color: var(--text-dim); font-family: var(--font-mono); font-size: 11px; }

.lessons-panel {
  flex: 1;
  overflow-y: auto;
  padding: 6px 10px 40px;
}

.lesson-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  margin: 8px 0 12px;
  transition: border-color 0.15s, box-shadow 0.15s;
  position: relative;
}
.lesson-card:hover {
  border-color: var(--amber-dim);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}
.lesson-card::before {
  content: '';
  position: absolute;
  left: 0; top: 14px; bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--amber) 0%, transparent 100%);
  border-radius: 2px;
  opacity: 0.4;
}

.lesson-card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 6px;
}
.lesson-n {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.lesson-attr {
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 999px;
  white-space: nowrap;
}
.attr-anthropic { background: rgba(232, 122, 83, 0.12); color: #e87a53; border: 1px solid rgba(232, 122, 83, 0.3); }
.attr-cognition { background: rgba(155, 110, 255, 0.12); color: #b794ff; border: 1px solid rgba(155, 110, 255, 0.3); }
.attr-openai    { background: rgba(63, 185, 80, 0.12);  color: #62d97a; border: 1px solid rgba(63, 185, 80, 0.3); }

.lesson-title {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: -0.005em;
  margin: 4px 0 6px;
  color: var(--text);
  line-height: 1.3;
}
.lesson-principle {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-dim);
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px dashed var(--line);
  line-height: 1.55;
}

.lesson-section-label {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 10px 0 6px;
  opacity: 0.85;
}
.lesson-impl {
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-dim);
  padding-left: 16px;
  margin: 0 0 4px;
}
.lesson-impl li { margin-bottom: 2px; }
.lesson-impl li::marker { color: var(--amber-dim); }

.lesson-pointers {
  list-style: none;
  padding: 0;
  margin: 0;
}
.lesson-pointers li { margin-bottom: 4px; }
.ptr-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  color: var(--text);
  text-decoration: none;
  background: var(--ink-2);
  border: 1px solid var(--line);
  transition: background 120ms ease, border-color 120ms ease;
  font-size: 11.5px;
  cursor: pointer;
}
.ptr-link:hover {
  background: rgba(255, 180, 84, 0.08);
  border-color: rgba(255, 180, 84, 0.3);
  text-decoration: none;
}
.ptr-link code {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--amber);
  background: transparent;
  border: 0;
  padding: 0;
  white-space: nowrap;
  flex-shrink: 0;
}
.ptr-desc {
  color: var(--text-soft);
  flex: 1;
  font-size: 11px;
  line-height: 1.45;
}
.ptr-arrow {
  color: var(--amber);
  opacity: 0.55;
  font-size: 10px;
  flex-shrink: 0;
  transition: transform 120ms ease, opacity 120ms ease;
}
.ptr-link:hover .ptr-arrow {
  opacity: 1;
  transform: translate(1px, -1px);
}

/* =========================================================
   STATIC-MODE BANNER (GitHub Pages only)
   ========================================================= */
.static-banner {
  position: relative;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 36px;
  padding: 4px 16px;
  background: linear-gradient(90deg,
    rgba(255, 180, 84, 0.18) 0%,
    rgba(255, 180, 84, 0.10) 50%,
    rgba(255, 180, 84, 0.18) 100%);
  border-bottom: 1px solid var(--amber-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.static-banner .sb-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}
.static-banner .sb-mark { font-family: var(--font-display); font-size: 14px; opacity: 0.9; }
.static-banner .sb-sep  { color: var(--text-soft); opacity: 0.6; }
.static-banner a {
  color: var(--amber);
  border-bottom: 1px dotted var(--amber-dim);
  padding-bottom: 1px;
}
.static-banner a:hover { color: #fff; border-color: #fff; text-decoration: none; }
body.has-static-banner .grid { height: calc(100vh - 64px - 36px); }

/* segmented setting switcher (right side of static banner) */
.demo-switcher {
  display: inline-flex;
  flex-shrink: 0;
  border-radius: 8px;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(255, 180, 84, 0.22);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
}
.demo-switcher button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--text-dim);
  font-family: var(--font-ui);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 4px 12px;
  line-height: 1.4;
  cursor: pointer;
  transition: background 120ms ease, color 120ms ease;
  white-space: nowrap;
}
.demo-switcher button + button {
  border-left: 1px solid rgba(255, 180, 84, 0.18);
}
.demo-switcher button:hover:not(.is-active) {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}
.demo-switcher button.is-active {
  background: rgba(255, 180, 84, 0.18);
  color: var(--amber);
  box-shadow: inset 0 -2px 0 rgba(255, 180, 84, 0.4);
}
.demo-switcher button.is-active:hover {
  background: rgba(255, 180, 84, 0.24);
}
.demo-switcher button:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: -2px;
}

.btn.is-disabled {
  opacity: 0.35;
  cursor: not-allowed;
  filter: grayscale(0.6);
}
.btn.is-disabled:hover {
  border-color: var(--line);
  background: var(--panel);
  color: var(--text);
}

/* =========================================================
   RESPONSIVE (keep demo usable on projector screens)
   ========================================================= */
@media (max-width: 1280px) {
  .grid { grid-template-columns: 220px 1fr 380px; }
  .viewer { padding: 24px 28px 40px; }
}
@media (max-width: 1024px) {
  .grid { grid-template-columns: 200px 1fr 340px; }
  .pills { display: none; }
  .static-banner .sb-label,
  .static-banner .sb-sep { display: none; }
}

/* =========================================================
   Loading overlay — first-paint cover during snapshot build
   ========================================================= */

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10, 14, 20, 0.96);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  animation: loading-fade-in 220ms ease-out;
  transition: opacity 300ms ease, visibility 300ms ease;
}

.loading-overlay.is-hiding {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 48px 56px;
  min-width: 380px;
  max-width: 90vw;
  background: var(--panel, #141922);
  border: 1px solid var(--line, #232a36);
  border-radius: 10px;
  box-shadow: 0 12px 48px -8px rgba(0, 0, 0, 0.5);
}

.loading-mark {
  font-size: 44px;
  color: var(--amber, #ffb454);
  animation: loading-spin 2.8s linear infinite;
  line-height: 1;
}

.loading-title {
  font-family: 'Fraunces', serif;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text, #e6edf3);
  line-height: 1;
}

.loading-sub {
  font-size: 13px;
  color: var(--text-dim, #9aa5b5);
  letter-spacing: 0.03em;
}

.loading-bar {
  width: 100%;
  height: 3px;
  margin-top: 8px;
  background: var(--line-soft, #1c2230);
  border-radius: 2px;
  overflow: hidden;
}

.loading-bar-fill {
  height: 100%;
  width: 38%;
  background: linear-gradient(
    90deg,
    transparent,
    var(--amber, #ffb454),
    transparent
  );
  animation: loading-bar-slide 1.4s ease-in-out infinite;
}

.loading-phase {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 12px;
  color: var(--amber, #ffb454);
  letter-spacing: 0.04em;
  min-height: 1.2em;
  transition: color 200ms ease;
}

.loading-hint {
  font-size: 11px;
  color: var(--text-soft, #64707f);
  letter-spacing: 0.02em;
  margin-top: 4px;
}

@keyframes loading-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes loading-bar-slide {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(280%); }
}

@keyframes loading-fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .loading-mark { animation: none; }
  .loading-bar-fill { animation: none; width: 100%; opacity: 0.6; }
  .loading-overlay { animation: none; }
}