.hidden { display: none !important; }

.app-workspace {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 60px);
  overflow: hidden;
}

.topbar {
  display: flex;
  align-items: center;
  height: 48px;
  padding: 0 12px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  flex-shrink: 0;
  z-index: 51;
  gap: 8px;
}

.topbar__left {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 280px;
  flex-shrink: 0;
  min-width: 0;
}

.topbar__center {
  flex: 1;
}

.topbar__right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.notebook-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
  outline: none;
  border-radius: 4px;
  padding: 2px 4px;
  margin: 0 -4px;
}
.notebook-title:focus {
  background: var(--surface);
  outline: 1px solid var(--accent);
}

.workspace {
  display: flex;
  flex: 1;
  overflow: hidden;
}

.sources-panel {
  width: 280px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  background: var(--surface);
  overflow: hidden;
  transition: width 0.2s, opacity 0.2s;
}
.sources-panel.collapsed {
  width: 0;
  opacity: 0;
  pointer-events: none;
  overflow: hidden;
}

.sources-section {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
  max-height: 50%;
  border-bottom: 1px solid var(--border-subtle);
  background: linear-gradient(to bottom, rgba(255,255,255,0.02), transparent 70%);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 10px 6px;
  flex-shrink: 0;
}

.section-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-primary);
  opacity: 0.85;
  display: flex;
  align-items: center;
  gap: 5px;
}

.section-count {
  font-weight: 400;
  opacity: 0.6;
}

.add-source-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-sans);
  padding: 4px 9px;
  cursor: pointer;
  transition: opacity 0.12s;
}
.add-source-btn:hover { opacity: 0.85; }

.docs-list {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px;
  min-height: 0;
}
.docs-list::-webkit-scrollbar { width: 3px; }
.docs-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.doc-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 7px;
  cursor: pointer;
  transition: background 0.12s;
  margin-bottom: 2px;
}
.doc-item:hover { background: var(--surface-raised); }
.doc-item.selected { background: var(--accent-dim); }

.doc-icon {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: rgba(248,113,113,0.12);
  border: 1px solid rgba(248,113,113,0.2);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 12px;
}
.doc-icon.url { background: rgba(99,102,241,0.12); border-color: rgba(99,102,241,0.25); }

.doc-info { flex: 1; min-width: 0; }
.doc-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.doc-meta { font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }

.doc-status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}
.doc-status-dot.indexing { background: #f59e0b; animation: pulse 1.2s ease-in-out infinite; }
.doc-status-dot.ready    { background: #4ade80; }
.doc-status-dot.error    { background: #f87171; }

.source-item-actions { margin-left: auto; display: flex; align-items: center; gap: 3px; flex-shrink: 0; }
.source-gear-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  font-size: 10px;
  padding: 2px 5px;
  cursor: pointer;
}
.source-gear-btn:hover { color: var(--text-primary); border-color: var(--border-strong); }
.doc-del-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 2px;
  display: flex;
  align-items: center;
}
.doc-del-btn:hover { color: #f87171; }

.doc-checkbox {
  flex-shrink: 0;
  cursor: pointer;
  accent-color: var(--accent);
}

.upload-drop-zone {
  margin: 6px 8px;
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 10px;
  text-align: center;
  color: var(--text-tertiary);
  font-size: 11px;
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color 0.12s, background 0.12s;
}
.upload-drop-zone:hover, .upload-drop-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-dim);
  color: var(--accent);
}

.url-fetch-row {
  display: flex;
  gap: 5px;
  padding: 4px 8px 6px;
  flex-shrink: 0;
}
.url-fetch-input {
  flex: 1;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 11px;
  font-family: var(--font-sans);
  padding: 4px 8px;
  outline: none;
  transition: border-color 0.15s;
}
.url-fetch-input:focus { border-color: var(--accent); }
.url-fetch-btn {
  background: var(--accent-dim);
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: 6px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 600;
  font-family: var(--font-sans);
  padding: 4px 9px;
  cursor: pointer;
  white-space: nowrap;
}
.url-fetch-btn:hover { opacity: 0.8; }
.url-fetch-btn:disabled { opacity: 0.4; cursor: default; }

.section-divider {
  height: 10px;
  background: linear-gradient(to bottom, transparent, var(--border-subtle), transparent);
  margin: 0 8px;
  flex-shrink: 0;
}

.sessions-section {
  display: flex;
  flex-direction: column;
  flex: 1;
  overflow: hidden;
  min-height: 0;
  background: linear-gradient(to top, rgba(99,102,241,0.03), transparent 60%);
}

.sessions-search-input {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-primary);
  font-size: 11px;
  font-family: var(--font-sans);
  padding: 3px 7px;
  outline: none;
  width: 80px;
  transition: border-color 0.15s;
}
.sessions-search-input:focus { border-color: var(--accent); width: 100px; }

.sessions-list {
  flex: 1;
  overflow-y: auto;
  padding: 2px 6px;
  min-height: 0;
}
.sessions-list::-webkit-scrollbar { width: 3px; }
.sessions-list::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.chat-hist-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 8px;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.1s;
  margin-bottom: 1px;
}
.chat-hist-item:hover { background: var(--surface-raised); }
.chat-hist-icon { font-size: 12px; flex-shrink: 0; }
.chat-hist-info { flex: 1; min-width: 0; }
.chat-hist-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.chat-hist-date { font-size: 10px; color: var(--text-secondary); font-family: var(--font-mono); }

.new-chat-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  margin: 4px 8px 8px;
  padding: 7px;
  border: 1px dashed var(--border);
  border-radius: 7px;
  color: var(--text-secondary);
  font-size: 11px;
  cursor: pointer;
  background: none;
  font-family: var(--font-sans);
  transition: all 0.12s;
  flex-shrink: 0;
}
.new-chat-btn:hover { color: var(--text-primary); border-color: var(--border-strong); background: var(--surface-raised); }

.docs-empty-hint {
  padding: 20px 12px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.6;
}

.ctx-budget-bar {
  height: 3px; background: var(--border);
  border-radius: 2px; overflow: hidden; margin: 0 8px 2px;
}
.ctx-budget-fill {
  height: 100%; background: #4ade80; border-radius: 2px;
  transition: width 0.3s, background 0.3s;
}
.ctx-budget-fill.warn { background: #f59e0b; }
.ctx-budget-fill.over { background: #f87171; }
.ctx-budget-label {
  font-size: 10px; font-family: var(--font-mono);
  color: var(--text-secondary); margin: 0 8px 6px;
  display: block;
}

.chat-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.responses-area {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: radial-gradient(ellipse at center, rgba(99,102,241,0.04) 0%, transparent 65%);
}
.responses-area.compare-mode {
  grid-template-columns: 1fr 1fr;
}
@media (max-width: 700px) {
  .responses-area.compare-mode { grid-template-columns: 1fr; }
}

.resp-col {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--border);
  position: relative;
}
.resp-col:last-child { border-right: none; }

.resp-col-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--surface-raised);
  font-size: 12px;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.resp-model-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.resp-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  flex-shrink: 0;
}
.resp-meta-val { color: var(--accent); font-weight: 500; }

.resp-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-primary);
}
.resp-body::-webkit-scrollbar { width: 4px; }
.resp-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.resp-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-secondary);
  font-size: 13px;
  text-align: center;
  padding: 20px;
}

.resp-body.rendered p { margin: 0 0 0.7em; }
.resp-body.rendered p:last-child { margin-bottom: 0; }
.resp-body.rendered h1,.resp-body.rendered h2,.resp-body.rendered h3 {
  font-weight: 700; margin: 0.9em 0 0.35em; line-height: 1.3;
}
.resp-body.rendered h1 { font-size: 1.15em; }
.resp-body.rendered h2 { font-size: 1.05em; }
.resp-body.rendered h3 { font-size: 1em; }
.resp-body.rendered ul,.resp-body.rendered ol { padding-left: 1.4em; margin: 0.4em 0; }
.resp-body.rendered li { margin-bottom: 0.2em; }
.resp-body.rendered pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 10px 12px;
  overflow-x: auto;
  margin: 0.7em 0;
  position: relative;
  font-size: 12px;
}
.resp-body.rendered pre code {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  background: none;
  padding: 0;
}
.resp-body.rendered code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  padding: 1px 4px;
}
.resp-body.rendered pre code { border: none; }
.resp-body.rendered blockquote {
  border-left: 2px solid var(--accent);
  margin: 0.5em 0;
  padding-left: 10px;
  color: var(--text-secondary);
}
.resp-body.rendered table {
  border-collapse: collapse;
  width: 100%;
  margin: 0.6em 0;
  font-size: 13px;
}
.resp-body.rendered th,.resp-body.rendered td {
  border: 1px solid var(--border);
  padding: 5px 8px;
}
.resp-body.rendered th { background: var(--surface-raised); font-weight: 600; }

.resp-copy-btn {
  position: absolute;
  top: 6px; right: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  font-size: 10px;
  font-family: var(--font-mono);
  padding: 2px 7px;
  cursor: pointer;
}
.resp-copy-btn:hover { color: var(--text-primary); }

.resp-tags {
  display: none;
  gap: 5px;
  padding: 6px 12px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border-subtle);
  background: var(--surface);
  flex-shrink: 0;
}
.resp-tags.show { display: flex; }
.resp-tag-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  font-size: 11px;
  font-family: var(--font-mono);
  padding: 2px 7px;
  cursor: pointer;
  transition: all 0.12s;
}
.resp-tag-btn:hover { border-color: #f87171; color: #f87171; }
.resp-tag-btn.on { background: rgba(248,113,113,0.1); border-color: #f87171; color: #f87171; }

.msg-actions-bar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 8px;
  border-top: 1px solid var(--border-subtle);
  background: var(--surface);
  flex-shrink: 0;
  opacity: 0;
  transition: opacity 0.15s;
}
.resp-col:hover .msg-actions-bar { opacity: 1; }
.msg-act-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-secondary);
  font-size: 11px;
  font-family: var(--font-sans);
  padding: 3px 8px;
  cursor: pointer;
  transition: all 0.12s;
}
.msg-act-btn:hover { color: var(--text-primary); border-color: var(--border-strong); }
.msg-act-spacer { flex: 1; }
.msg-act-btn.thumb { font-size: 13px; padding: 2px 6px; }
.msg-act-btn.active-up { background: rgba(74,222,128,0.1); border-color: #4ade80; }
.msg-act-btn.active-down { background: rgba(248,113,113,0.1); border-color: #f87171; }

.resp-status-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #6b7280;
  flex-shrink: 0;
}
.resp-status-dot.ok   { background: #4ade80; box-shadow: 0 0 4px rgba(74,222,128,0.5); }
.resp-status-dot.slow { background: #f59e0b; box-shadow: 0 0 4px rgba(245,158,11,0.4); }
.resp-status-dot.err  { background: #f87171; box-shadow: 0 0 4px rgba(248,113,113,0.5); }

.model-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.single-model-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 180px;
}
.single-model-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  white-space: nowrap;
  flex-shrink: 0;
}
.model-select {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-primary);
  padding: 5px 9px;
  font-size: 13px;
  font-family: var(--font-sans);
  cursor: pointer;
  outline: none;
  min-width: 0;
}
.model-select:focus { border-color: var(--accent); }

.compare-slots {
  display: none;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}
.compare-slots.visible { display: flex; flex: 1; }

.model-slot {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 150px;
}
.model-slot-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 2px 7px;
  border-radius: 4px;
  white-space: nowrap;
  flex-shrink: 0;
}
.model-slot-label.a { background: rgba(99,102,241,0.15); color: #818cf8; }
.model-slot-label.b { background: rgba(16,185,129,0.15); color: #34d399; }
.model-slot select {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 5px 8px;
  font-size: 12px;
  font-family: var(--font-sans);
  cursor: pointer;
  outline: none;
  min-width: 0;
}
.model-slot select:focus { border-color: var(--accent); }
.model-row-divider { width: 1px; height: 28px; background: var(--border); flex-shrink: 0; }

.model-row-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  margin-left: auto;
}

.input-area {
  flex-shrink: 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rag-status-bar {
  font-size: 11px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  display: none;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 7px;
  white-space: nowrap;
  overflow: hidden;
}
.rag-status-bar.visible { display: flex; }

.rag-mode-switcher {
  display: flex;
  gap: 2px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px;
}
.rag-mode-btn {
  padding: 3px 8px;
  border-radius: 4px;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-size: 10px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.rag-mode-btn:hover { color: var(--text-primary); }
.rag-mode-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid rgba(99,102,241,0.3);
}

.rag-sources-indicator {
  font-size: 11px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  padding: 0 2px;
  opacity: 0;
  transition: opacity 0.2s;
}
.rag-sources-indicator.searching { opacity: 1; }

.input-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
}

.tb-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 11px;
  font-family: var(--font-sans);
  padding: 4px 9px;
  cursor: pointer;
  transition: color 0.12s, border-color 0.12s, background 0.12s;
  white-space: nowrap;
}
.tb-btn:hover { color: var(--text-primary); border-color: var(--border-strong); background: var(--surface-raised); }
.tb-btn.active { color: var(--accent); border-color: var(--accent); background: var(--accent-dim); }

.model-select-compact {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 4px 8px;
  font-size: 12px;
  font-family: var(--font-sans);
  cursor: pointer;
  outline: none;
  max-width: 240px;
  -webkit-text-fill-color: var(--text-primary);
}
.model-select-compact option {
  background: var(--bg, #1a1a2e);
  color: var(--text-primary, #e2e8f0);
  -webkit-text-fill-color: var(--text-primary, #e2e8f0);
}
.model-select-compact:focus { border-color: var(--accent); }

.compare-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: none;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.compare-toggle:hover { border-color: var(--border-strong); color: var(--text-primary); }
.compare-toggle.active { background: var(--accent-dim); border-color: rgba(99,102,241,0.35); color: var(--accent); }

.studio-toggle-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: none;
  color: var(--text-secondary);
  font-size: 11px;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.studio-toggle-btn:hover { border-color: var(--border-strong); color: var(--text-primary); }
.studio-toggle-btn.active {
  background: linear-gradient(135deg, rgba(99,102,241,0.22), rgba(99,102,241,0.1));
  border-color: rgba(99,102,241,0.55);
  color: #c8cbff;
  box-shadow: 0 0 0 1px rgba(99,102,241,0.2) inset;
}

.model-context-hint {
  font-size: 10px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0 4px;
}

.tb-spacer { flex: 1; }

.tb-token-count {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-primary);
  opacity: 0.82;
}

.validation-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 4px;
  background: rgba(245,158,11,0.12);
  border: 1px solid rgba(245,158,11,0.25);
  color: #f59e0b;
  display: flex;
  align-items: center;
  gap: 4px;
}

.msg-row {
  display: flex;
  align-items: flex-end;
  gap: 8px;
}

.msg-textarea {
  flex: 1;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-sans);
  padding: 9px 12px;
  resize: none;
  outline: none;
  min-height: 44px;
  max-height: 160px;
  line-height: 1.5;
  overflow-y: auto;
  transition: border-color 0.15s;
}
.msg-textarea:focus { border-color: var(--accent); }
.msg-textarea::placeholder { color: var(--text-secondary); }

.send-btn {
  flex-shrink: 0;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.1) inset, 0 4px 14px rgba(99,102,241,0.45);
}
.send-btn:hover { opacity: 1; filter: brightness(1.08); }
.send-btn:active { transform: scale(0.93); }
.send-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.input-error {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  color: #f87171;
  font-size: 13px;
  padding: 8px 11px;
  background: rgba(248,113,113,0.08);
  border: 1px solid rgba(248,113,113,0.2);
  border-radius: 7px;
}
.input-error-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.input-error-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-secondary);
}
.input-error-details-btn {
  background: none;
  border: 1px solid rgba(248,113,113,0.25);
  color: #fca5a5;
  border-radius: 5px;
  font-size: 10px;
  padding: 2px 7px;
  cursor: pointer;
}
.input-error-progress {
  width: 100%;
  height: 4px;
  border-radius: 999px;
  background: rgba(248,113,113,0.12);
  overflow: hidden;
}
.input-error-progress > div {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #fb7185, #f59e0b);
  transition: width 0.2s linear;
}
.input-error-details {
  font-size: 11px;
  color: #fca5a5;
  line-height: 1.45;
  white-space: pre-wrap;
  max-height: 110px;
  overflow: auto;
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: 32px 24px;
  gap: 20px;
}
.empty-state__title {
  font-weight: 600;
  font-size: 20px;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  text-align: center;
}
.empty-state__hint {
  font-size: 14px;
  color: var(--text-secondary);
  opacity: 0.9;
  text-align: center;
}
.suggestion-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  width: 100%;
  max-width: 480px;
}
.suggestion-card {
  text-align: left;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  font-family: var(--font-sans);
}
.suggestion-card:hover { border-color: var(--accent); background: var(--accent-dim); }
.suggestion-card__label {
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.suggestion-card__text {
  font-size: 12px;
  color: var(--text-primary);
  line-height: 1.5;
}

.rag-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 20px 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  justify-content: flex-end;
}
.rag-messages::-webkit-scrollbar { width: 4px; }
.rag-messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.rag-msg { display: flex; gap: 10px; max-width: 100%; }
.rag-msg.user { flex-direction: row-reverse; }
.rag-avatar {
  width: 28px; height: 28px;
  border-radius: 8px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 700;
}
.rag-msg.user .rag-avatar { background: var(--accent); color: #fff; }
.rag-msg.assistant .rag-avatar { background: var(--surface-raised); color: var(--text-secondary); }
.rag-bubble {
  max-width: 85%;
  padding: 12px 14px;
  border-radius: 14px;
  font-size: 15px;
  line-height: 1.72;
}
.rag-msg.user .rag-bubble {
  background: var(--accent-dim);
  border: 1px solid rgba(99,102,241,0.2);
  color: var(--text-primary);
  border-top-right-radius: 4px;
}
.rag-msg.assistant .rag-bubble {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-top-left-radius: 4px;
  box-shadow: 0 1px 0 rgba(255,255,255,0.05) inset;
}

.rag-sources {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.rag-source-chip {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-secondary);
  font-size: 11px;
  padding: 2px 8px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
.rag-source-chip:hover { background: var(--accent-dim); border-color: rgba(99,102,241,0.4); color: var(--accent); }

.rag-cite-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 16px; height: 16px; border-radius: 50%;
  background: rgba(99,102,241,0.2); border: 1px solid rgba(99,102,241,0.4);
  color: var(--accent); font-size: 10px; font-weight: 700;
  cursor: pointer; margin: 0 1px; vertical-align: super;
  transition: background 0.12s;
}
.rag-cite-num:hover { background: var(--accent); color: #fff; }

.rag-validation {
  margin-top: 6px;
  padding: 5px 8px;
  border-radius: 5px;
  font-size: 12px;
}
.rag-val-text { background: var(--surface); color: var(--text-secondary); }
.rag-val-ok   { background: rgba(74,222,128,0.08); color: #4ade80; border: 1px solid rgba(74,222,128,0.2); }
.rag-val-warn { background: rgba(245,158,11,0.08); color: #f59e0b; border: 1px solid rgba(245,158,11,0.2); }

.diff-add { background: rgba(74,222,128,0.13); border-radius: 2px; }
.diff-del { background: rgba(248,113,113,0.13); text-decoration: line-through; border-radius: 2px; }

.stream-cursor {
  display: inline-block;
  width: 2px; height: 1em;
  background: var(--accent);
  border-radius: 1px;
  vertical-align: text-bottom;
  animation: blink 0.9s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.mini-spinner {
  width: 10px; height: 10px;
  border: 1.5px solid rgba(255,255,255,0.2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.right-panel {
  width: 320px;
  flex-shrink: 0;
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  background: var(--bg);
  overflow: hidden;
}
.right-panel.hidden { display: none; }

.right-panel__header {
  display: flex;
  align-items: center;
  gap: 0;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: var(--surface);
  padding: 0 8px;
}

.right-panel__tab {
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  border: none;
  background: none;
  font-family: var(--font-sans);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.right-panel__tab:hover { color: var(--text-primary); }
.right-panel__tab.active { color: var(--text-primary); border-bottom-color: var(--accent); }

.right-panel__close {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  padding: 6px 8px;
  border-radius: 5px;
}
.right-panel__close:hover { background: var(--surface-raised); color: var(--text-primary); }

.right-panel__content {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.rp-panel {
  display: none;
  flex: 1;
  flex-direction: column;
  overflow: hidden;
}
.rp-panel.active { display: flex; }

.doc-viewer-content {
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--text-primary);
  white-space: pre-wrap;
  padding: 12px;
}
.highlight-chunk {
  background: rgba(251,191,36,0.25);
  border-radius: 3px;
  outline: 2px solid rgba(251,191,36,0.5);
  animation: hlpulse 0.6s ease;
}
@keyframes hlpulse { 0% { background: rgba(251,191,36,0.5); } 100% { background: rgba(251,191,36,0.25); } }

.notebook-textarea {
  flex: 1;
  width: 100%;
  min-height: 0;
  border: none;
  border-radius: 0;
  padding: 12px;
  resize: none;
  background: var(--bg);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-primary);
  font-family: var(--font-sans);
  outline: none;
}
.notebook-textarea::placeholder { color: var(--text-secondary); }

.studio-content {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}
.studio-content::-webkit-scrollbar { width: 4px; }
.studio-content::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.studio-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 12px;
}

.studio-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 11px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.studio-card:hover { border-color: var(--accent); background: var(--accent-dim); }
.studio-card.selected { border-color: var(--accent); background: var(--accent-dim); }

.studio-card-icon {
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  line-height: 1;
}
.studio-card-name {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-primary);
}
.studio-card-desc {
  font-size: 10px;
  color: var(--text-secondary);
  line-height: 1.3;
}

.studio-gen-form {
  display: none;
  flex-direction: column;
  gap: 10px;
}
.studio-gen-form.visible { display: flex; }

.studio-form-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 4px;
}
.studio-form-back {
  background: none;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 3px 8px;
  font-size: 12px;
}
.studio-form-back:hover { color: var(--text-primary); }
.studio-form-title-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}

.studio-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.studio-field label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
}
.studio-field input, .studio-field select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text-primary);
  font-size: 12px;
  font-family: var(--font-sans);
  padding: 6px 9px;
  outline: none;
  transition: border-color 0.15s;
}
.studio-field input:focus, .studio-field select:focus { border-color: var(--accent); }

.studio-gen-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 600;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: opacity 0.15s;
}
.studio-gen-btn:hover { opacity: 0.85; }
.studio-gen-btn:disabled { opacity: 0.35; cursor: not-allowed; }

.studio-result {
  display: none;
  flex-direction: column;
  gap: 8px;
}
.studio-result.visible { display: flex; }

.studio-result-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--text-primary);
  min-height: 100px;
  max-height: 300px;
  overflow-y: auto;
  white-space: pre-wrap;
}
.studio-result-actions {
  display: flex;
  gap: 6px;
}
.studio-result-btn {
  flex: 1;
  padding: 6px 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-secondary);
  font-size: 11px;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all 0.12s;
}
.studio-result-btn:hover { color: var(--text-primary); border-color: var(--border-strong); }

.studio-nb-list { display: flex; flex-direction: column; gap: 8px; }
.studio-nb-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 10px;
  position: relative;
}
.studio-nb-card-meta {
  display: flex;
  gap: 6px;
  margin-bottom: 5px;
  font-size: 10px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}
.studio-nb-card-model { color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em; }
.studio-nb-card-text { font-size: 12px; line-height: 1.5; color: var(--text-primary); }
.studio-nb-card-del {
  position: absolute;
  top: 6px; right: 6px;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 3px;
}
.studio-nb-card-del:hover { color: #f87171; }

.key-status-pill {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: border-color 0.15s, color 0.15s;
  white-space: nowrap;
}
.key-status-pill:hover { border-color: var(--accent); color: var(--text-primary); }
.key-status-pill.has-key { color: var(--text-primary); }
.key-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #4b5563;
  flex-shrink: 0;
  transition: background 0.2s;
}
.key-dot.ok  { background: #4ade80; box-shadow: 0 0 5px rgba(74,222,128,0.5); }
.key-dot.err { background: #f87171; }

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: 7px;
  border: 1px solid var(--border);
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.12s;
  flex-shrink: 0;
}
.icon-btn:hover { color: var(--text-primary); border-color: var(--border-strong); background: var(--surface); }

.settings-drawer {
  position: fixed;
  top: 0; right: 0;
  width: 360px;
  height: 100vh;
  background: var(--bg);
  border-left: 1px solid var(--border);
  z-index: 200;
  transform: translateX(100%);
  transition: transform 0.25s cubic-bezier(0.4,0,0.2,1);
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 32px rgba(0,0,0,0.3);
}
.settings-drawer.open { transform: translateX(0); }

.settings-scrim {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  z-index: 199;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}
.settings-scrim.open { opacity: 1; pointer-events: auto; }

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.settings-title { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.settings-close {
  background: none; border: none; color: var(--text-secondary); cursor: pointer;
  padding: 4px; border-radius: 5px;
  display: flex; align-items: center; justify-content: center;
}
.settings-close:hover { background: var(--surface); color: var(--text-primary); }

.settings-body {
  flex: 1; overflow-y: auto; padding: 16px;
  display: flex; flex-direction: column; gap: 20px;
}
.settings-body::-webkit-scrollbar { width: 4px; }
.settings-body::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.settings-group { display: flex; flex-direction: column; gap: 10px; }
.settings-group-label {
  font-size: 10px; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-secondary);
}
.settings-group-subtle {
  margin-top: -6px;
  font-size: 11px;
  color: var(--text-tertiary);
}
.settings-field { display: flex; flex-direction: column; gap: 5px; }
.settings-field-label { font-size: 12px; font-weight: 500; color: var(--text-primary); }
.settings-field-hint { font-size: 11px; color: var(--text-tertiary); line-height: 1.5; }

.settings-input {
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text-primary); font-size: 13px; font-family: var(--font-mono);
  padding: 8px 11px; outline: none; width: 100%; box-sizing: border-box;
  transition: border-color 0.15s;
}
.settings-input:focus { border-color: var(--accent); }
.settings-input::placeholder { color: var(--text-tertiary); font-size: 12px; }
.settings-input::placeholder { opacity: 0.92; }

.settings-select {
  background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text-primary); font-size: 13px; font-family: var(--font-sans);
  padding: 8px 11px; outline: none; width: 100%; box-sizing: border-box; cursor: pointer;
}
.settings-select:focus { border-color: var(--accent); }

.key-type-tabs {
  display: flex; gap: 4px; background: var(--surface);
  border-radius: 8px; padding: 3px; border: 1px solid var(--border);
}
.key-type-tab {
  flex: 1; padding: 5px 8px; border-radius: 5px; border: none;
  background: none; color: var(--text-secondary);
  font-size: 11px; font-weight: 600; font-family: var(--font-sans); cursor: pointer;
  transition: all 0.15s; text-align: center;
}
.key-type-tab.active {
  background: var(--bg); color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.key-input-row { display: flex; gap: 6px; align-items: center; }
.key-input-row .settings-input { flex: 1; }
.key-vis-btn {
  flex-shrink: 0; background: var(--surface); border: 1px solid var(--border);
  border-radius: 7px; color: var(--text-secondary); cursor: pointer; padding: 7px 9px;
  display: flex; align-items: center;
}
.key-vis-btn:hover { color: var(--text-primary); border-color: var(--border-strong); }

.settings-slider-row { display: flex; align-items: center; gap: 8px; }
.settings-slider {
  flex: 1; -webkit-appearance: none; appearance: none;
  height: 4px; background: var(--border); border-radius: 2px; outline: none; cursor: pointer;
}
.settings-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 14px; height: 14px;
  background: var(--accent); border-radius: 50%; cursor: pointer;
}
.settings-slider::-moz-range-thumb {
  width: 14px; height: 14px; background: var(--accent); border-radius: 50%; border: none;
}
.settings-slider-val {
  font-size: 11px; font-family: var(--font-mono); color: var(--accent);
  min-width: 50px; text-align: center;
  border: 1px solid rgba(99,102,241,0.28);
  background: var(--accent-dim);
  border-radius: 999px;
  padding: 2px 6px;
}

.settings-btn {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: none; color: var(--text-primary); font-size: 12px; font-weight: 500;
  font-family: var(--font-sans); cursor: pointer; transition: all 0.15s; width: 100%;
}
.settings-btn:hover { background: var(--surface); border-color: var(--border-strong); }
.settings-btn.danger { color: #f87171; border-color: rgba(248,113,113,0.25); }
.settings-btn.danger:hover { background: rgba(248,113,113,0.08); border-color: rgba(248,113,113,0.5); }
.settings-btn.primary { background: var(--accent-dim); border-color: rgba(99,102,241,0.3); color: var(--accent); }
.settings-btn.primary:hover { background: rgba(99,102,241,0.2); }

.validation-toggle-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; cursor: pointer; transition: border-color 0.15s;
}
.validation-toggle-row:hover { border-color: var(--border-strong); }
.validation-toggle-row.active { border-color: rgba(245,158,11,0.4); background: rgba(245,158,11,0.05); }
.pt-left { display: flex; flex-direction: column; gap: 2px; }
.pt-name { font-size: 13px; font-weight: 500; color: var(--text-primary); }
.pt-hint { font-size: 11px; color: var(--text-secondary); }
.pt-badge {
  font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 4px;
  background: rgba(245,158,11,0.12); border: 1px solid rgba(245,158,11,0.25); color: #f59e0b;
  transition: all 0.15s;
}
.validation-toggle-row:not(.active) .pt-badge { background: var(--bg); color: var(--text-tertiary); border-color: var(--border); }

.providers-list { flex: 1; overflow-y: auto; padding: 8px; }
.provider-item {
  border: 1px solid var(--border); border-radius: 8px;
  padding: 9px 10px; margin-bottom: 6px;
  cursor: pointer; transition: border-color 0.12s, background 0.12s; position: relative;
}
.provider-accordion { padding: 0; overflow: hidden; }
.provider-summary {
  list-style: none;
  cursor: pointer;
  padding: 10px 10px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.provider-summary::-webkit-details-marker { display: none; }
.provider-summary-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}
.provider-chip {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 1px 6px;
}
.provider-body {
  padding: 0 10px 8px;
}
.provider-note {
  margin-top: 4px;
  font-size: 10px;
  color: var(--text-tertiary);
}
.provider-item:hover { border-color: var(--border-strong); background: var(--surface-raised); }
.provider-item.active-provider { border-color: rgba(99,102,241,0.5); background: var(--accent-dim); }
.provider-name { font-size: 13px; font-weight: 600; color: var(--text-primary); display: flex; align-items: center; gap: 6px; }
.provider-dot { width: 6px; height: 6px; border-radius: 50%; background: #6b7280; flex-shrink: 0; }
.provider-dot.ok { background: #4ade80; box-shadow: 0 0 4px rgba(74,222,128,0.5); }
.provider-dot.err { background: #f87171; }
.provider-dot.testing { background: #f59e0b; animation: pulse 1s infinite; }
.provider-url { font-size: 11px; color: var(--text-tertiary); font-family: var(--font-mono); margin-top: 2px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.provider-model { font-size: 11px; color: var(--text-secondary); margin-top: 1px; }
.provider-actions { display: flex; gap: 4px; margin-top: 7px; }
.prov-btn {
  font-size: 11px; padding: 6px 10px; border-radius: 7px;
  border: 1px solid var(--border); background: var(--bg);
  color: var(--text-secondary); cursor: pointer; font-family: var(--font-sans);
  transition: all 0.12s;
  min-height: 32px;
}
.prov-btn:hover { color: var(--text-primary); border-color: var(--border-strong); }
.prov-btn.test { color: #a5f3fc; border-color: rgba(34,211,238,0.25); background: rgba(34,211,238,0.07); }
.prov-btn.use  { color: var(--accent); border-color: rgba(99,102,241,0.3); background: var(--accent-dim); }
.prov-btn.del  { color: #f87171; border-color: rgba(248,113,113,0.25); background: rgba(248,113,113,0.07); }

.add-provider-btn {
  display: flex; align-items: center; justify-content: center; gap: 5px;
  margin: 6px 8px 8px; padding: 8px;
  border: 1px dashed var(--border); border-radius: 8px;
  color: var(--text-secondary); font-size: 12px;
  cursor: pointer; background: none; font-family: var(--font-sans);
  transition: all 0.12s; flex-shrink: 0;
}
.add-provider-btn:hover { color: var(--text-primary); border-color: var(--border-strong); background: var(--surface-raised); }

.settings-danger-zone {
  margin-top: 4px;
  padding-top: 10px;
  border-top: 1px dashed rgba(248,113,113,0.25);
}

.prov-modal-scrim {
  position: fixed; inset: 0; background: rgba(0,0,0,0.55);
  z-index: 300; display: none; align-items: center; justify-content: center;
}
.prov-modal-scrim.open { display: flex; }
.prov-modal {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 14px; width: 380px; max-width: 92vw;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  display: flex; flex-direction: column; overflow: hidden;
}
.prov-modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
}
.prov-modal-title { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.prov-modal-body { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.prov-field { display: flex; flex-direction: column; gap: 5px; }
.prov-field label { font-size: 12px; font-weight: 500; color: var(--text-primary); }
.prov-field input, .prov-field select {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; color: var(--text-primary); font-size: 13px;
  font-family: var(--font-mono); padding: 8px 11px;
  outline: none; width: 100%; box-sizing: border-box; transition: border-color 0.15s;
}
.prov-field input:focus, .prov-field select:focus { border-color: var(--accent); }
.prov-field input::placeholder { color: var(--text-tertiary); }
.prov-modal-footer {
  display: flex; justify-content: flex-end; gap: 8px;
  padding: 12px 16px; border-top: 1px solid var(--border);
}
.prov-save-btn {
  background: var(--accent); color: #fff; border: none;
  border-radius: 8px; padding: 8px 18px; font-size: 13px; font-weight: 600;
  cursor: pointer; font-family: var(--font-sans);
}
.prov-cancel-btn {
  background: var(--surface); color: var(--text-secondary);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 8px 16px; font-size: 13px; cursor: pointer; font-family: var(--font-sans);
}

.rp-viewer-header {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 6px;
  flex-shrink: 0;
  background: var(--surface);
}
.rp-viewer-name {
  font-size: 11px; font-weight: 600; color: var(--text-primary);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1;
}
.rp-viewer-info { font-size: 10px; font-family: var(--font-mono); color: var(--text-tertiary); }

.rp-notes-header {
  padding: 8px 10px 6px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: space-between;
}
.rp-notes-label {
  font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--text-secondary);
}
.rp-notes-auto { font-size: 10px; color: var(--text-secondary); }

.sys-vars-hint { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
.sys-var-chip {
  background: var(--surface); border: 1px solid var(--border); border-radius: 4px;
  color: var(--text-secondary); font-size: 10px; font-family: var(--font-mono);
  padding: 2px 6px; cursor: pointer; transition: all 0.12s;
}
.sys-var-chip:hover { border-color: var(--accent); color: var(--accent); }

.sys-modal-scrim {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
}
.sys-modal-scrim.open { display: flex; }
.sys-modal {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  width: 640px;
  max-width: 94vw;
  height: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 64px rgba(0,0,0,0.5);
  overflow: hidden;
}
.sys-modal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.sys-modal-title {
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  flex-shrink: 0;
  margin-right: 4px;
}
.sys-modal-textarea {
  flex: 1;
  background: var(--bg);
  border: none;
  color: var(--text-primary);
  font-size: 13.5px;
  font-family: var(--font-mono);
  padding: 14px 16px;
  resize: none;
  outline: none;
  line-height: 1.65;
  min-height: 0;
}
.sys-modal-textarea::placeholder { color: var(--text-secondary); }
.sys-modal-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}
.sys-token-count {
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.prompt-lib-modal {
  position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  z-index: 400; display: none; align-items: center; justify-content: center;
}
.prompt-lib-modal.open { display: flex; }
.prompt-lib-box {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 14px; width: 420px; max-width: 92vw; max-height: 80vh;
  overflow: hidden; display: flex; flex-direction: column;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.prompt-lib-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; border-bottom: 1px solid var(--border);
}
.prompt-lib-title { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.prompt-lib-list { overflow-y: auto; padding: 8px; }
.prompt-lib-item {
  padding: 10px 12px; border-radius: 8px; cursor: pointer;
  transition: background 0.12s; margin-bottom: 4px;
}
.prompt-lib-item:hover { background: var(--surface); }
.prompt-lib-name { font-size: 13px; font-weight: 600; color: var(--text-primary); margin-bottom: 3px; }
.prompt-lib-preview { font-size: 11px; color: var(--text-secondary); font-family: var(--font-mono); }

.rp-viewer-empty-hint {
  padding: 24px 12px;
  text-align: center;
}

.studio-nb-empty {
  text-align: center;
  padding: 20px 12px;
  color: var(--text-secondary);
  font-size: 12px;
}

@media (max-width: 768px) {
  .sources-panel { display: none; }
  .sources-panel.mobile-open { display: flex; position: fixed; left: 0; top: 60px; bottom: 0; z-index: 100; }
  .right-panel { display: none !important; }
  .topbar__left { width: auto; }
}
@media (max-width: 1120px) {
  .sources-panel { width: 240px; }
}