/* chat.samttle.ai — terminal-donor dark palette mapped ONTO @smtl/ui-tokens
   variables. Components consume var(--smtl-*) only; the :root block below is
   the single place raw colors live (terminal public/index.html:11-29 donor). */

:root {
  --smtl-bg-app: #1a1a2e;
  --smtl-bg-sidebar: #0f0f23;
  --smtl-bg-editor: #0d1117;
  --smtl-bg-panel: #16213e;
  --smtl-bg-statusbar: #0f0f23;
  --smtl-bg-elevated: #1f2a4a;
  --smtl-bg-overlay: rgba(10, 10, 24, 0.92);
  --smtl-bg-hover: #232f52;
  --smtl-bg-active: #2a3a66;
  --smtl-text-primary: #c9d1d9;
  --smtl-text-secondary: #8b949e;
  --smtl-brand-primary: #58a6ff;
  --smtl-brand-accent: #3fb950;
  --smtl-border-default: #2d3a5a;
  --chat-danger: #f85149;
  --chat-warn: #e8a838;
  --chat-font-ui: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --chat-font-mono: 'Cascadia Code', 'Fira Code', Menlo, monospace;
  /* ONE head height for the sidebar head, topbar and rail head (FR-0003 AC-1) */
  --chat-head-h: 52px;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: var(--chat-font-ui);
  background: var(--smtl-bg-app);
  color: var(--smtl-text-primary);
}
.hidden { display: none !important; }
.accent { color: var(--smtl-brand-primary); }
button {
  font: inherit; border: 1px solid var(--smtl-border-default);
  background: var(--smtl-bg-elevated); color: var(--smtl-text-primary);
  border-radius: 6px; padding: 6px 14px; cursor: pointer;
}
button:hover { background: var(--smtl-bg-hover); }
button.ghost { background: transparent; border-color: transparent; color: var(--smtl-text-secondary); }
input, textarea, select {
  font: inherit; color: var(--smtl-text-primary);
  background: var(--smtl-bg-editor); border: 1px solid var(--smtl-border-default);
  border-radius: 6px; padding: 8px 10px;
}
input:focus, textarea:focus, select:focus { outline: 1px solid var(--smtl-brand-primary); }

/* ---- Login overlay (terminal 380px auth card) ---- */
#auth-screen {
  position: fixed; inset: 0; display: flex; align-items: center; justify-content: center;
  background: var(--smtl-bg-overlay); z-index: 10;
}
.auth-card {
  width: 380px; padding: 32px; border-radius: 12px;
  background: var(--smtl-bg-panel); border: 1px solid var(--smtl-border-default);
  display: flex; flex-direction: column; gap: 12px;
}
.auth-card h1 { margin: 0 0 4px; font-size: 22px; }
.auth-sub { margin: 0; color: var(--smtl-text-secondary); font-size: 13px; }
.auth-card form { display: flex; flex-direction: column; gap: 10px; }
.auth-card button[type="submit"] {
  background: var(--smtl-brand-primary); border-color: var(--smtl-brand-primary); color: #0d1117;
  font-weight: 600;
}
.auth-error { color: var(--chat-danger); font-size: 13px; }

/* ---- App shell: sidebar 260px + main column ---- */
#app { display: flex; height: 100vh; }
#sidebar {
  width: 260px; flex: none; background: var(--smtl-bg-sidebar);
  border-right: 1px solid var(--smtl-border-default);
  display: flex; flex-direction: column;
}
/* All three heads share ONE height so the rails line up exactly (AC-1). */
.sidebar-head, #topbar, .rail-head {
  height: var(--chat-head-h);
  min-height: var(--chat-head-h);
  box-sizing: border-box;
  display: flex; align-items: center;
  border-bottom: 1px solid var(--smtl-border-default);
}
.sidebar-head, .rail-head { justify-content: space-between; padding: 0 12px; }
.icon-btn {
  background: transparent; border: 1px solid transparent; color: var(--smtl-text-secondary);
  font-size: 16px; line-height: 1; padding: 5px 9px; border-radius: 6px;
}
.icon-btn:hover { background: var(--smtl-bg-hover); color: var(--smtl-text-primary); }
.brand { font-weight: 600; }
#conversation-list { flex: 1; overflow-y: auto; padding: 6px; }
.conv-item {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 10px; border-radius: 6px; cursor: pointer;
  color: var(--smtl-text-secondary); font-size: 13px;
}
.conv-item:hover { background: var(--smtl-bg-hover); color: var(--smtl-text-primary); }
.conv-item.active { background: var(--smtl-bg-active); color: var(--smtl-text-primary); }
.conv-item .title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-item .del { visibility: hidden; color: var(--smtl-text-secondary); border: none; background: none; padding: 0 4px; }
.conv-item:hover .del { visibility: visible; }
.conv-item .del:hover { color: var(--chat-danger); }

#main { flex: 1; display: flex; flex-direction: column; min-width: 0; }

/* ---- Topbar with picker ---- */
#topbar { gap: 12px; padding: 0 12px; background: var(--smtl-bg-panel); }
/* The title is the primary context: it gets a floor, and the picker yields
   first when the topbar is tight (screenshot 2026-08-17 showed "New con..."). */
#conv-title {
  font-weight: 600; flex: 1 1 auto; min-width: 160px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
#picker { display: flex; gap: 10px; align-items: center; min-width: 0; flex: 0 1 auto; }
#picker label { display: flex; flex-direction: column; font-size: 11px; color: var(--smtl-text-secondary); gap: 2px; min-width: 0; }
#picker select {
  min-width: 88px; max-width: 150px; width: 100%;
  padding: 2px 6px; font-size: 12px;
  text-overflow: ellipsis;
}
/* Rail visibility is class-driven on #app so state is one source of truth. */
#app.sidebar-hidden #sidebar,
#app.rail-hidden #right-rail { display: none; }

/* ---- Sidebar groups, inline rename, drag-move, context menu (FR-0006) ---- */
.sidebar-actions { display: flex; align-items: center; gap: 4px; }
.group-container { margin-bottom: 2px; }
.group-header {
  display: flex; align-items: center; gap: 6px;
  padding: 5px 8px; border-radius: 6px; cursor: pointer;
  font-size: 12px; color: var(--smtl-text-secondary); user-select: none;
}
.group-header:hover { background: var(--smtl-bg-hover); color: var(--smtl-text-primary); }
.group-caret { font-size: 13px; width: 12px; flex-shrink: 0; color: var(--smtl-text-primary); line-height: 1; }
.group-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.group-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.group-count { font-size: 10px; opacity: 0.6; font-family: var(--chat-font-mono); }
.group-body { padding-left: 12px; border-left: 1px solid var(--smtl-border-default); margin-left: 12px; }
.group-empty { padding: 6px 10px; font-size: 11px; color: var(--smtl-text-secondary); opacity: 0.6; font-style: italic; }
.name-input {
  flex: 1; min-width: 0; font: inherit; font-size: 12px; padding: 2px 4px;
  background: var(--smtl-bg-editor); color: var(--smtl-text-primary);
  border: 1px solid var(--smtl-brand-primary); border-radius: 4px;
}
.conv-item.dragging { opacity: 0.4; }
.conv-item.drop-before { box-shadow: inset 0 2px 0 0 var(--smtl-brand-primary); }
.conv-item.drop-after { box-shadow: inset 0 -2px 0 0 var(--smtl-brand-primary); }
.group-header.drop-into { background: var(--smtl-bg-active); outline: 1px dashed var(--smtl-brand-primary); }

.ctx-menu {
  position: fixed; z-index: 30; min-width: 190px; padding: 4px;
  background: var(--smtl-bg-panel); border: 1px solid var(--smtl-border-default);
  border-radius: 8px; box-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
}
.ctx-menu-item {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px; border-radius: 5px; font-size: 12px;
  color: var(--smtl-text-primary); cursor: pointer;
}
.ctx-menu-item:hover { background: var(--smtl-bg-hover); }
.ctx-menu-sep { height: 1px; background: var(--smtl-border-default); margin: 4px 6px; }
.ctx-dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }

/* ---- Right rail: per-turn dashboard ---- */
#right-rail {
  width: 320px; flex: none; background: var(--smtl-bg-sidebar);
  border-left: 1px solid var(--smtl-border-default);
  display: flex; flex-direction: column; overflow: hidden;
}
.rail-note { padding: 8px 12px; font-size: 11px; color: var(--smtl-text-secondary); border-bottom: 1px solid var(--smtl-border-default); }
#rail-turns { flex: 1; overflow-y: auto; padding: 8px; display: flex; flex-direction: column; gap: 8px; }
.turn-card {
  background: var(--smtl-bg-panel); border: 1px solid var(--smtl-border-default);
  border-radius: 8px; padding: 10px; font-size: 12px;
}
.turn-card .turn-head { display: flex; justify-content: space-between; align-items: center; gap: 6px; margin-bottom: 6px; }
.turn-card .turn-n { color: var(--smtl-brand-primary); font-weight: 600; }
.turn-card .turn-model { color: var(--smtl-text-secondary); font-size: 10px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.turn-card .summary { color: var(--smtl-text-primary); line-height: 1.45; }
.turn-card .branches { margin-top: 8px; display: flex; flex-direction: column; gap: 4px; }
.branch {
  text-align: left; font-size: 11px; padding: 5px 8px; border-radius: 6px;
  background: var(--smtl-bg-editor); border: 1px solid var(--smtl-border-default);
  color: var(--smtl-text-secondary); cursor: pointer;
}
.branch:hover { color: var(--smtl-text-primary); border-color: var(--smtl-brand-primary); }
.branch::before { content: '↳ '; color: var(--smtl-brand-accent); }
.turn-card .pending { color: var(--chat-warn); }
.turn-card .err { color: var(--chat-danger); }

/* ---- Settings: terminal-service tab pattern (sidebar nav swap + tab panes) ---- */
#sidebar-settings-nav { display: none; flex-direction: column; flex: 1; overflow: hidden; }
#sidebar.settings-mode #conversation-list,
#sidebar.settings-mode .sidebar-head { display: none; }
#sidebar.settings-mode #sidebar-settings-nav { display: flex; }

.settings-nav-header {
  height: var(--chat-head-h); min-height: var(--chat-head-h); box-sizing: border-box;
  padding: 0 12px; display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--smtl-border-default);
}
.settings-back-btn {
  background: none; border: none; color: var(--smtl-text-secondary);
  font-size: 16px; padding: 4px 6px; border-radius: 4px; line-height: 1; flex-shrink: 0;
}
.settings-back-btn:hover { background: var(--smtl-bg-hover); color: var(--smtl-text-primary); }
.settings-nav-title { font-size: 13px; font-weight: 600; color: var(--smtl-text-primary); }
.settings-nav-list { padding: 8px 0; flex: 1; overflow-y: auto; }
.settings-nav-item {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 9px 14px 9px 24px; text-align: left; font-family: inherit; font-size: 13px;
  color: var(--smtl-text-secondary); background: none;
  border: none; border-left: 2px solid transparent; border-radius: 0;
}
.settings-nav-item:hover { background: var(--smtl-bg-hover); }
.settings-nav-item.active {
  background: var(--smtl-bg-active); border-left-color: var(--smtl-brand-primary);
  color: var(--smtl-text-primary);
}
.settings-nav-item .nav-icon { font-size: 15px; color: var(--smtl-text-secondary); width: 18px; text-align: center; flex-shrink: 0; }
.settings-nav-item.active .nav-icon { color: var(--smtl-brand-primary); }

#settings-content { display: none; flex-direction: column; flex: 1; overflow-y: auto; background: var(--smtl-bg-app); }
#main.settings-active #transcript,
#main.settings-active #composer { display: none !important; }
#main.settings-active #settings-content { display: flex; }
#main.settings-active #picker { display: none; }
.settings-content-header { padding: 24px 32px 0; font-size: 20px; font-weight: 700; color: var(--smtl-text-primary); }
.settings-content-body { padding: 16px 32px 32px; max-width: 640px; }
.settings-tab-content { display: none; }
.settings-tab-content.active { display: block; }
.settings-body { padding: 8px 0; }
.setting-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 14px; gap: 12px; border-radius: 6px;
}
.setting-row:hover { background: var(--smtl-bg-hover); }
.setting-label { font-size: 13px; color: var(--smtl-text-secondary); flex: 1; }
.setting-label small { display: block; font-size: 11px; color: var(--smtl-text-secondary); opacity: 0.75; margin-top: 3px; line-height: 1.4; }
.setting-value { font-size: 12px; color: var(--smtl-text-primary); font-family: var(--chat-font-mono); }
.setting-note { font-size: 12px; color: var(--smtl-text-secondary); padding: 0 14px 10px; line-height: 1.5; }
.settings-divider { height: 1px; background: var(--smtl-border-default); margin: 8px 14px; }
.setting-select {
  background: var(--smtl-bg-editor); color: var(--smtl-text-primary);
  border: 1px solid var(--smtl-border-default); border-radius: 4px;
  padding: 4px 8px; font-size: 12px; font-family: inherit; max-width: 240px; min-width: 150px;
}
.setting-select:focus { border-color: var(--smtl-brand-primary); }
#settings-save { background: var(--smtl-brand-primary); border-color: var(--smtl-brand-primary); color: #0d1117; font-weight: 600; }
.icon-btn.active { background: var(--smtl-bg-active); color: var(--smtl-brand-primary); }

/* Providers tab: expandable model lists with per-model toggles */
.setting-label { display: flex; align-items: baseline; gap: 8px; }
.caret-btn {
  background: none; border: none; color: var(--smtl-text-primary);
  font-size: 14px; padding: 0 4px 0 0; line-height: 1.2; flex-shrink: 0;
}
.caret-btn:hover:not(:disabled) { color: var(--smtl-brand-primary); background: none; }
.caret-btn:disabled { opacity: 0.3; cursor: default; }
.model-list {
  margin: 0 14px 10px 34px; padding: 8px;
  background: var(--smtl-bg-editor); border: 1px solid var(--smtl-border-default); border-radius: 6px;
}
.model-bulk { display: flex; gap: 6px; align-items: center; margin-bottom: 6px; }
.model-filter { flex: 1; min-width: 0; max-width: none; }
.model-bulk button { font-size: 11px; padding: 4px 8px; }
.model-rows { max-height: 260px; overflow-y: auto; }
.model-row {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 4px 6px; border-radius: 4px;
}
.model-row:hover { background: var(--smtl-bg-hover); }
.model-name {
  font-size: 12px; font-family: var(--chat-font-mono); color: var(--smtl-text-primary);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* Capability probe: verdicts + effort chips (FR-0005) */
.probe-bar { display: flex; gap: 6px; align-items: center; margin: 0 14px 6px 34px; flex-wrap: wrap; }
.probe-bar button { font-size: 11px; padding: 4px 8px; }
.probe-bar button:disabled { opacity: 0.4; cursor: default; }
.probe-progress { font-size: 11px; color: var(--chat-warn); font-family: var(--chat-font-mono); }
.ok-text { color: var(--smtl-brand-accent); }
.err-text { color: var(--chat-danger); }
.model-row.probe-ok { border-left: 2px solid var(--smtl-brand-accent); padding-left: 4px; }
.model-row.probe-failed { border-left: 2px solid var(--chat-danger); padding-left: 4px; opacity: 0.65; }
.probe-badge { font-size: 10px; font-family: var(--chat-font-mono); flex-shrink: 0; min-width: 62px; text-align: right; }
.probe-badge.ok { color: var(--smtl-brand-accent); }
.probe-badge.bad { color: var(--chat-danger); }
.probe-badge.untested { color: var(--smtl-text-secondary); opacity: 0.5; }
.effort-chips { display: flex; gap: 3px; flex-shrink: 0; }
.chip {
  font-size: 9px; padding: 1px 5px; border-radius: 8px; text-transform: uppercase; letter-spacing: 0.03em;
  border: 1px solid var(--smtl-border-default); color: var(--smtl-text-secondary); opacity: 0.55;
}
.chip-ok { color: var(--smtl-brand-accent); border-color: var(--smtl-brand-accent); opacity: 1; }
.chip-bad { color: var(--chat-danger); border-color: var(--chat-danger); opacity: 1; text-decoration: line-through; }
.model-row { gap: 8px; }
.model-name { flex: 1; min-width: 0; }

/* Toggle switch (terminal parity) */
.toggle { position: relative; display: inline-block; width: 38px; height: 20px; flex-shrink: 0; }
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle .slider {
  position: absolute; cursor: pointer; inset: 0; border-radius: 20px;
  background: var(--smtl-bg-editor); border: 1px solid var(--smtl-border-default); transition: background 0.15s;
}
.toggle .slider::before {
  content: ''; position: absolute; height: 14px; width: 14px; left: 2px; top: 2px;
  border-radius: 50%; background: var(--smtl-text-secondary); transition: transform 0.15s, background 0.15s;
}
.toggle input:checked + .slider { background: var(--smtl-bg-active); border-color: var(--smtl-brand-primary); }
.toggle input:checked + .slider::before { transform: translateX(18px); background: var(--smtl-brand-primary); }
.toggle.small { width: 30px; height: 16px; }
.toggle.small .slider::before { height: 10px; width: 10px; }
.toggle.small input:checked + .slider::before { transform: translateX(14px); }
.badge {
  font-size: 11px; padding: 2px 8px; border-radius: 10px;
  background: var(--chat-warn); color: #0d1117; font-weight: 600;
}

/* ---- Transcript ---- */
#transcript { flex: 1; overflow-y: auto; padding: 20px 24px; display: flex; flex-direction: column; gap: 14px; }
.msg { max-width: 82%; padding: 10px 14px; border-radius: 10px; white-space: pre-wrap; word-wrap: break-word; font-size: 14px; line-height: 1.5; }
.msg.user { align-self: flex-end; background: var(--smtl-bg-active); }
.msg.assistant { align-self: flex-start; background: var(--smtl-bg-panel); border: 1px solid var(--smtl-border-default); font-family: var(--chat-font-mono); font-size: 13px; }
.msg.error { align-self: center; color: var(--chat-danger); background: transparent; border: 1px dashed var(--chat-danger); }
.msg .meta { display: block; margin-top: 6px; font-size: 11px; color: var(--smtl-text-secondary); font-family: var(--chat-font-ui); }
.msg.streaming::after { content: '▋'; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ---- Composer + statusbar ---- */
#composer { display: flex; gap: 10px; padding: 12px 16px; border-top: 1px solid var(--smtl-border-default); background: var(--smtl-bg-panel); }
#input { flex: 1; resize: none; font-family: var(--chat-font-ui); }
.composer-actions { display: flex; flex-direction: column; gap: 6px; justify-content: flex-end; }
#send-btn { background: var(--smtl-brand-accent); border-color: var(--smtl-brand-accent); color: #0d1117; font-weight: 600; }
#stop-btn { background: var(--chat-danger); border-color: var(--chat-danger); color: #0d1117; font-weight: 600; }

#statusbar {
  display: flex; align-items: center; gap: 10px;
  padding: 4px 12px; font-size: 12px; color: var(--smtl-text-secondary);
  background: var(--smtl-bg-statusbar); border-top: 1px solid var(--smtl-border-default);
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--smtl-brand-accent); display: inline-block; }
.dot.busy { background: var(--chat-warn); }
.dot.err { background: var(--chat-danger); }
.spacer { flex: 1; }
.probe-badge.warn { color: var(--chat-warn); }

/* ---- Rail: last-turn card, cross-turn digest, categories (FR-0007) ---- */
.last-card, .digest-card {
  background: var(--smtl-bg-panel); border: 1px solid var(--smtl-border-default);
  border-radius: 8px; padding: 10px; font-size: 12px; margin-bottom: 8px;
}
.last-card { border-left: 3px solid var(--smtl-brand-accent); }
.last-label, .digest-title {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--smtl-text-secondary); font-weight: 700;
}
.last-turn-n { color: var(--smtl-brand-primary); font-weight: 600; margin: 4px 0; }
.digest-head { display: flex; align-items: center; justify-content: space-between; gap: 6px; }
.digest-head button { font-size: 10px; padding: 3px 7px; }
.digest-headline { color: var(--smtl-text-primary); font-weight: 600; line-height: 1.4; margin: 6px 0; }
.digest-cov { font-size: 10px; color: var(--smtl-text-secondary); margin-top: 6px; font-family: var(--chat-font-mono); }
.digest-cov.warn { color: var(--chat-warn); }
.field { display: flex; gap: 6px; margin-top: 4px; line-height: 1.4; }
.field-k {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--smtl-text-secondary); min-width: 58px; flex-shrink: 0; padding-top: 1px;
}
.field-v { color: var(--smtl-text-primary); font-size: 11px; }
.cat-list { margin-top: 8px; border-top: 1px solid var(--smtl-border-default); padding-top: 6px; }
.cat-row { display: flex; align-items: center; gap: 6px; padding: 3px 0; }
.cat-name { flex: 1; font-size: 11px; color: var(--smtl-text-primary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cat-turns { display: flex; gap: 3px; flex-wrap: wrap; }
.turn-chip {
  font-size: 10px; padding: 1px 6px; border-radius: 8px; font-family: var(--chat-font-mono);
  background: var(--smtl-bg-editor); border: 1px solid var(--smtl-border-default); color: var(--smtl-text-secondary);
}
.turn-chip:hover { color: var(--smtl-brand-primary); border-color: var(--smtl-brand-primary); background: var(--smtl-bg-hover); }
.turn-cat {
  display: inline-block; font-size: 9px; text-transform: uppercase; letter-spacing: 0.04em;
  padding: 1px 6px; border-radius: 8px; margin-bottom: 4px;
  background: var(--smtl-bg-active); color: var(--smtl-brand-primary);
}
.rail-hint { font-size: 11px; color: var(--smtl-text-secondary); line-height: 1.45; }
.rail-all { width: 100%; margin-bottom: 8px; font-size: 11px; }
.msg.flash { outline: 2px solid var(--smtl-brand-primary); outline-offset: 2px; }

/* ---- Rich markdown in assistant responses (FR-0008) ---- */
.msg.assistant { position: relative; font-family: var(--chat-font-ui); font-size: 14px; }
/* Only the FIRST block reserves room for the copy button. Reserving it on the
   whole bubble narrows every code block and table for a collision that can only
   happen on the first line. */
.msg.assistant .md > *:first-child { margin-top: 0; padding-right: 46px; }
.msg.assistant .md > *:last-child { margin-bottom: 0; }
.md p { margin: 0 0 8px; line-height: 1.55; }
.md h1, .md h2, .md h3, .md h4, .md h5, .md h6 {
  margin: 14px 0 6px; line-height: 1.3; color: var(--smtl-text-primary); font-weight: 700;
}
.md h1 { font-size: 18px; } .md h2 { font-size: 16px; } .md h3 { font-size: 15px; }
.md h4, .md h5, .md h6 { font-size: 14px; }
.md ul, .md ol { margin: 0 0 8px; padding-left: 20px; }
.md li { margin: 2px 0; line-height: 1.5; }
.md li > ul, .md li > ol { margin: 2px 0; }
.md blockquote {
  margin: 8px 0; padding: 2px 10px; border-left: 3px solid var(--smtl-brand-primary);
  color: var(--smtl-text-secondary);
}
.md code {
  font-family: var(--chat-font-mono); font-size: 12px; padding: 1px 4px; border-radius: 4px;
  background: var(--smtl-bg-editor); border: 1px solid var(--smtl-border-default);
}
.md pre {
  margin: 8px 0; padding: 10px; border-radius: 6px; overflow-x: auto;
  background: var(--smtl-bg-editor); border: 1px solid var(--smtl-border-default);
}
.md pre code { border: none; background: none; padding: 0; font-size: 12px; line-height: 1.5; }
.md hr { border: none; border-top: 1px solid var(--smtl-border-default); margin: 12px 0; }
.md table { border-collapse: collapse; margin: 8px 0; font-size: 12px; display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--smtl-border-default); padding: 4px 8px; text-align: left; }
.md th { background: var(--smtl-bg-elevated); font-weight: 600; }
.md a { color: var(--smtl-brand-primary); }
.md strong { color: var(--smtl-text-primary); }
.md .cite-ref, .msg.assistant .cite-ref {
  font-size: 10px; padding: 0 3px; border-radius: 4px; text-decoration: none;
  background: var(--smtl-bg-active); color: var(--smtl-brand-primary); vertical-align: super;
}
.msg.assistant.streaming .md { white-space: pre-wrap; font-family: var(--chat-font-mono); font-size: 13px; }

.sources { margin-top: 10px; padding-top: 8px; border-top: 1px solid var(--smtl-border-default); }
.sources-label {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--smtl-text-secondary); font-weight: 700; margin-bottom: 4px;
}
.sources ol { margin: 0; padding-left: 18px; }
.sources li { font-size: 11px; line-height: 1.5; }
.sources a { color: var(--smtl-brand-primary); }
.cite-dead { color: var(--smtl-text-secondary); }

.copy-btn {
  position: absolute; top: 6px; right: 6px;
  font-size: 10px; padding: 2px 7px; border-radius: 5px;
  background: var(--smtl-bg-elevated); border: 1px solid var(--smtl-border-default);
  color: var(--smtl-text-secondary); transition: opacity 0.12s;
  /* Dimmed, never hidden: opacity 0 makes it undiscoverable, and unreachable
     entirely on touch where there is no hover. */
  opacity: 0.4;
}
.msg.assistant:hover .copy-btn, .copy-btn:focus { opacity: 1; }
.copy-btn:hover { color: var(--smtl-brand-primary); border-color: var(--smtl-brand-primary); }