/* ==========================================================================
   KilgoreAI — chat app stylesheet
   Design tokens, fonts and the base reset live in tokens.css — load it first.
   ========================================================================== */

* { margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: var(--fs-body) / var(--lh-body) var(--font);
  display: flex;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background var(--dur-slow) var(--ease), color var(--dur-slow) var(--ease);
}
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

/* ============ sidebar ============ */
#sidebar {
  width: var(--sidebar-w);
  min-width: var(--sidebar-w);
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  transition: width var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease), left var(--dur-slow) var(--ease), background var(--dur-slow) var(--ease);
  z-index: var(--z-sidebar);
}
.side-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-4) var(--sp-4) var(--sp-2);
}
.logo {
  /* No flex gap: the bare "Kilgore" text node is its own flex item, so a gap
     here splits the wordmark into "Kilgore AI". Space the image instead. */
  display: flex; align-items: center;
  font-size: var(--fs-lg); font-weight: var(--wt-bold); letter-spacing: -0.02em;
}
.logo img { width: 28px; height: 28px; border-radius: var(--r-sm); flex: none; margin-right: var(--sp-2); }
.logo span { color: var(--accent); transition: color var(--dur); }
.logo-link {
  display: flex; align-items: center;
  color: inherit; text-decoration: none;
  border-radius: var(--r-sm); transition: opacity var(--dur-fast);
}
.logo-link:hover { opacity: 0.85; }
.icon-btn {
  background: none; border: none; color: var(--text-faint);
  cursor: pointer; font-size: var(--fs-sm); border-radius: var(--r-xs);
  width: 28px; height: 28px; display: grid; place-items: center;
  transition: background var(--dur-fast), color var(--dur-fast);
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text); }
.icon-btn:active { transform: scale(0.92); }
#side-close { display: none; }

.new-btn {
  display: flex; align-items: center; gap: var(--sp-2);
  margin: var(--sp-1) var(--sp-3) var(--sp-2-5); padding: var(--sp-2) var(--sp-3);
  background: var(--accent-soft); color: var(--accent-strong);
  border: 1px solid var(--accent-border); border-radius: var(--r-sm);
  font: var(--wt-semi) var(--fs-sm) var(--font); cursor: pointer;
  transition: background var(--dur), border-color var(--dur), color var(--dur),
    box-shadow var(--dur) var(--ease);
}
.new-btn:hover {
  background: rgb(var(--accent-rgb) / 0.2);
  border-color: var(--accent-border-strong);
  box-shadow: 0 0 0 2px rgb(var(--accent-rgb) / 0.08);
}
.new-btn:active { transform: translateY(1px); }
.new-btn svg { flex: none; }

.search-box { margin: 0 var(--sp-3) var(--sp-2-5); position: relative; }
.search-box svg {
  position: absolute; left: 9px; top: 50%; transform: translateY(-50%);
  color: var(--text-faint); pointer-events: none;
}
.search-box input {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: var(--sp-2) var(--sp-2-5) var(--sp-2) var(--sp-8); font: var(--fs-xs) var(--font);
  transition: border-color var(--dur) var(--ease);
}
.search-box input::placeholder { color: var(--text-faint); }
.search-box input:focus { border-color: var(--accent); }

.side-btn {
  display: flex; align-items: center; gap: var(--sp-2);
  margin: 0 var(--sp-3) var(--sp-2-5); padding: var(--sp-2) var(--sp-3);
  background: none; color: var(--text-dim);
  border: 1px solid var(--border); border-radius: var(--r-sm);
  font: var(--wt-semi) var(--fs-sm) var(--font); cursor: pointer;
  transition: background var(--dur), border-color var(--dur), color var(--dur);
}
.side-btn:hover {
  background: var(--bg-hover); color: var(--text); border-color: var(--border-strong);
}
.side-btn:active { transform: translateY(1px); }
.side-btn svg { flex: none; }

.side-label {
  padding: var(--sp-1) var(--sp-4) var(--sp-1-5); font-size: var(--fs-micro); font-weight: var(--wt-semi);
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-faint);
}
.side-label.pinned-label {
  display: flex; align-items: center; gap: var(--sp-1-5);
}
.side-label.pinned-label svg { color: var(--warn); }
.conv-list { flex: 1; overflow-y: auto; padding: var(--sp-05) var(--sp-2) var(--sp-2); }
.conv-item {
  position: relative; display: flex; align-items: center; gap: var(--sp-1-5);
  padding: var(--sp-2) var(--sp-2-5); border-radius: var(--r-sm);
  cursor: pointer; border: 1px solid transparent;
  transition: background var(--dur-fast);
}
.conv-item:hover { background: var(--bg-hover); }
.conv-item.active {
  background: var(--bg-elev-2);
  border-color: var(--border-strong);
}
.conv-item.active::before {
  content: ""; position: absolute; left: -1px; top: 8px; bottom: 8px;
  width: 3px; border-radius: var(--r-2xs); background: var(--accent);
  box-shadow: 0 0 8px rgb(var(--accent-rgb) / 0.3);
}
.conv-main { flex: 1; min-width: 0; }
.conv-item .conv-title {
  font-size: var(--fs-sm); color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.conv-item.active .conv-title { color: var(--text); }
.conv-meta { font-size: var(--fs-micro); color: var(--text-faint); margin-top: var(--sp-05); font-variant-numeric: tabular-nums; }
/* Kept in flow and faded instead of display:none, so revealing the actions on
   hover does not re-lay out the title next to them. */
.conv-actions {
  display: flex; align-items: center; gap: var(--sp-05); flex: none;
  opacity: 0; visibility: hidden; transform: translateX(4px);
  /* Same grace delay as message actions: icons revealed on hover must not
     vanish while the cursor is still travelling toward them. */
  transition: opacity var(--dur-fast) linear 200ms,
              transform var(--dur-fast) ease 200ms,
              visibility 0s linear calc(200ms + var(--dur-fast));
}
.conv-item:hover .conv-actions,
.conv-item:focus-within .conv-actions {
  opacity: 1; visibility: visible; transform: none;
}
.conv-actions .icon-btn { width: 26px; height: 26px; }
.conv-actions .icon-btn.danger:hover { color: var(--err); }
.conv-actions .icon-btn.pinned { color: var(--warn); }
.conv-actions .icon-btn.confirming { color: var(--err); background: var(--err-soft); font-size: var(--fs-label); width: auto; padding: 0 var(--sp-1-5); }
.rename-input {
  width: 100%; background: var(--bg); color: var(--text);
  border: 1px solid var(--accent); border-radius: var(--r-xs);
  padding: var(--sp-1) var(--sp-1-5); font: var(--fs-sm) var(--font);
}
.side-foot {
  padding: var(--sp-2-5) var(--sp-3); border-top: 1px solid var(--border);
  font-size: var(--fs-micro); color: var(--text-faint);
  display: flex; flex-direction: column; gap: var(--sp-2);
}
.side-foot .side-row { display: flex; align-items: center; gap: var(--sp-2); }
.side-foot .dot { width: 7px; height: 7px; }
.side-foot .theme-panel, .side-foot .lang-panel {
  top: auto; bottom: calc(100% + 8px);
  left: 0; right: auto;
  max-width: calc(var(--sidebar-w) - 24px);
}
.side-empty {
  padding: var(--sp-6) var(--sp-4); text-align: center; color: var(--text-faint); font-size: var(--fs-sm);
}

.scrim {
  position: fixed; inset: 0; background: rgb(var(--shadow-rgb) / 0.55);
  opacity: 0; pointer-events: none; transition: opacity var(--dur) var(--ease); z-index: var(--z-scrim);
}

/* ============ main ============ */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; height: 100vh; height: 100dvh; }

.topbar {
  display: flex; align-items: center; gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-5); border-bottom: 1px solid var(--border);
  background: var(--bg);
  transition: background var(--dur) ease;
}
.menu-btn { display: grid; }
.topbar .conv-title {
  flex: 1; min-width: 0;
  font-size: var(--fs-h3); font-weight: var(--wt-semi); letter-spacing: var(--tr-h3);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.topbar-right { display: flex; align-items: center; gap: var(--sp-2); }

/* .dot / @keyframes pulse now live in components.css */

/* ============ topbar dropdowns (model / theme / more) ============ */
.model-dd, .theme-dd, .more-dd, .lang-dd { position: relative; }
.model-btn {
  display: flex; align-items: center; gap: var(--sp-2);
  background: var(--bg-elev); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: var(--sp-1) var(--sp-2-5) var(--sp-1) var(--sp-1-5); font: var(--wt-medium) var(--fs-xs) var(--font);
  cursor: pointer; white-space: nowrap;
  transition: border-color var(--dur), background var(--dur);
}
.model-btn:hover { border-color: var(--border-strong); background: var(--bg-hover); }
/* Focus ring comes from the global :focus-visible contract; the accent border
   here only marks the open state. */
.model-btn.open { border-color: var(--accent); }
.model-btn .m-chev { color: var(--text-faint); flex: none; transition: transform var(--dur); }
.model-btn.open .m-chev { transform: rotate(180deg); }
#model-btn-name {
  max-width: 130px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

.m-logo { border-radius: var(--r-xs); flex: none; object-fit: contain; }
.model-btn .m-logo { width: 16px; height: 16px; }
.m-opt .m-logo, .m-group-head img { filter: drop-shadow(0 0 0 transparent); }
/* Marks that render black need a light plate; marks baked white need a dark
   one. kimi.svg is fill="#fff", so a light plate hid it in every theme. */
.m-logo.onlight, .m-logo.ondark { padding: var(--sp-1); border-radius: var(--r-xs); box-sizing: content-box; }
.m-logo.onlight { background: var(--logo-plate); }
.m-logo.ondark { background: var(--logo-plate-dark); }

.model-panel {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: var(--z-dropdown);
  width: 300px; max-height: 380px; overflow-y: auto;
  background: var(--bg-elev); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); box-shadow: var(--e3);
  padding: var(--sp-1-5); display: none;
  animation: ddIn var(--dur-fast) ease;
}
@keyframes ddIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: none; }
}
.model-panel.open { display: block; }
.m-group-head {
  display: flex; align-items: center; gap: var(--sp-2); width: 100%;
  padding: var(--sp-2) var(--sp-2-5) var(--sp-1-5); font-size: var(--fs-label); font-weight: var(--wt-bold);
  letter-spacing: 0.09em; text-transform: uppercase; color: var(--text-faint);
  background: none; border: none; cursor: pointer; border-radius: var(--r-xs);
  text-align: left;
}
.m-group-head:hover { color: var(--text-dim); background: var(--bg-hover); }
.m-group-head img { width: 14px; height: 14px; flex: none; }
.m-group-head .m-chev { flex: none; transition: transform var(--dur); color: var(--text-faint); }
.m-group-head .m-gname { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.m-group-head .m-gcount {
  font: var(--fs-label) var(--mono); color: var(--text-faint); background: var(--bg);
  border: 1px solid var(--border); border-radius: var(--r-pill); padding: 0 var(--sp-2);
  font-variant-numeric: tabular-nums;
}
.m-group-body { display: block; }
.m-group.collapsed .m-group-head .m-chev { transform: rotate(-90deg); }
.m-group.collapsed .m-group-body { display: none; }
.m-opt {
  display: flex; align-items: center; gap: var(--sp-2-5); width: 100%;
  background: none; border: none; border-radius: var(--r-sm); padding: var(--sp-2) var(--sp-2-5);
  cursor: pointer; text-align: left; color: var(--text);
  transition: background var(--dur-fast), box-shadow var(--dur) var(--ease);
}
.m-opt:hover { background: var(--bg-hover); box-shadow: inset 0 0 0 1px var(--border-strong); }
.m-opt.selected { background: var(--accent-soft); }
.m-opt .m-logo { width: 22px; height: 22px; }
.m-opt .m-body { flex: 1; min-width: 0; }
.m-opt .m-name { font-size: var(--fs-sm); font-weight: 550; line-height: 1.3; }
.m-opt .m-id { font: var(--fs-micro) var(--mono); color: var(--text-faint); }
.m-opt .m-check {
  color: var(--accent-strong); font-size: var(--fs-sm); flex: none;
  opacity: 0; transform: scale(0.6); transition: opacity var(--dur-fast), transform var(--dur-fast);
}
.m-opt.selected .m-check { opacity: 1; transform: scale(1); }
.model-panel .m-empty { padding: var(--sp-3-5); text-align: center; color: var(--text-faint); font-size: var(--fs-xs); }

/* theme switcher */
.theme-btn {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: var(--r-md);
  background: var(--bg-elev); border: 1px solid var(--border-strong);
  color: var(--text-dim); cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast),
    box-shadow var(--dur) var(--ease);
}
.theme-btn svg { width: 18px; height: 18px; }
.theme-btn:hover { color: var(--text); border-color: var(--accent-border); background: var(--bg-hover); box-shadow: 0 0 0 2px rgb(var(--accent-rgb) / 0.08); }
.theme-btn:active { transform: scale(0.94); }
.theme-btn.open { border-color: var(--accent); color: var(--accent-strong); }
.theme-panel {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: var(--z-dropdown);
  width: 230px; background: var(--bg-elev); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); box-shadow: var(--e3); padding: var(--sp-1-5); display: none;
  animation: ddIn var(--dur-fast) ease;
}
.theme-panel.open { display: block; }
.theme-opt {
  display: flex; align-items: center; gap: var(--sp-2-5); width: 100%;
  background: none; border: none; border-radius: var(--r-sm); padding: var(--sp-2) var(--sp-2-5);
  cursor: pointer; text-align: left; color: var(--text); font: var(--fs-sm) var(--font);
  transition: background var(--dur-fast);
}
.theme-opt:hover { background: var(--bg-hover); }
.theme-opt .swatch {
  width: 22px; height: 22px; border-radius: var(--r-xs); flex: none;
  border: 1px solid var(--border-strong);
}
.theme-opt .t-name { flex: 1; }
.theme-opt .t-check { color: var(--accent-strong); opacity: 0; font-size: var(--fs-xs); }
.theme-opt.selected .t-check { opacity: 1; }

/* more menu */
.more-btn {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: var(--r-md);
  background: var(--bg-elev); border: 1px solid var(--border-strong);
  color: var(--text-dim); cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast);
}
.more-btn svg { width: 18px; height: 18px; }
.more-btn:hover { color: var(--text); border-color: var(--accent-border); background: var(--bg-hover); }
.more-btn:active { transform: scale(0.94); }
.more-btn.open { border-color: var(--accent); color: var(--accent-strong); }
.donate-btn {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: var(--r-md);
  background: var(--bg-elev); border: 1px solid var(--border-strong);
  color: var(--text-dim); cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast), transform var(--dur-fast) var(--ease);
}
.donate-btn svg { width: 18px; height: 18px; }
.donate-btn:hover { color: var(--accent-strong); border-color: var(--accent-border); background: var(--bg-hover); }
.donate-btn:active { transform: scale(0.94); }
.modal.more-panel {
  width: min(440px, 100%);
  max-height: min(72dvh, 600px);
  overflow-y: auto;
  padding: var(--sp-2-5);
}
.more-panel.open { display: block; }
.more-sec {
  font-size: var(--fs-label); font-weight: var(--wt-semi); letter-spacing: 0.07em;
  text-transform: uppercase; color: var(--text-faint);
  padding: var(--sp-2) var(--sp-2-5) var(--sp-1); user-select: none;
}
.more-sec:first-child { padding-top: var(--sp-05); }
.more-item {
  display: flex; align-items: center; gap: var(--sp-2-5); width: 100%;
  background: none; border: none; border-radius: var(--r-md); padding: var(--sp-2-5) var(--sp-3);
  cursor: pointer; text-align: left; color: var(--text); font: var(--fs-sm) var(--font);
  transition: background var(--dur-fast);
}
.more-item:hover { background: var(--bg-hover); }
.more-item svg { width: 17px; height: 17px; color: var(--text-faint); flex: none; }
.more-item:hover svg { color: var(--text); }
.more-item .badge { margin-left: auto; font-size: var(--fs-label); color: var(--text-faint); }
.more-item .badge.on { color: var(--accent-strong); }

/* language switcher */
.lang-btn {
  display: grid; place-items: center;
  width: 38px; height: 38px; border-radius: var(--r-md);
  background: var(--bg-elev); border: 1px solid var(--border-strong);
  color: var(--text-dim); cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast);
}
.lang-code {
  font: var(--wt-bold) var(--fs-xs) var(--font); letter-spacing: 0.05em;
  padding-top: var(--sp-05); line-height: 1;
}
.lang-btn:hover { color: var(--text); border-color: var(--accent-border); background: var(--bg-hover); }
.lang-btn.open { border-color: var(--accent); color: var(--accent-strong); }
.lang-panel {
  position: absolute; top: calc(100% + 8px); right: 0; z-index: var(--z-dropdown);
  width: 150px; background: var(--bg-elev); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); box-shadow: var(--e3); padding: var(--sp-1-5); display: none;
  animation: ddIn var(--dur-fast) ease;
}
.lang-panel.open { display: block; }
.lang-opt {
  display: flex; align-items: center; width: 100%;
  background: none; border: none; border-radius: var(--r-sm); padding: var(--sp-2) var(--sp-2-5);
  cursor: pointer; text-align: left; color: var(--text); font: var(--fs-sm) var(--font);
  transition: background var(--dur-fast);
}
.lang-opt:hover { background: var(--bg-hover); }
.lang-opt.selected { color: var(--accent-strong); background: var(--accent-soft); }
.lang-opt.selected::after { content: "✓"; margin-left: auto; color: var(--accent-strong); font-size: var(--fs-xs); }

/* ============ messages ============ */
.msgs {
  flex: 1; overflow-y: auto; scroll-behavior: smooth;
  padding: var(--sp-6) 0 var(--sp-2);
}
.msgs-inner { max-width: var(--content-w); margin: 0 auto; padding: 0 var(--sp-6); display: flex; flex-direction: column; gap: var(--sp-6); }

/* welcome-area ad slot (consent-gated; zero-height until adsense.js boots) */
.ad-welcome {
  flex: none;
  max-width: var(--content-w);
  margin: 0 auto;
  padding: 0 var(--sp-6) var(--sp-2);
  width: 100%;
  box-sizing: border-box;
}

/* sidebar ad slot below the conversation list */
.ad-sidebar {
  flex: none;
  display: flex; justify-content: center;
  padding: var(--sp-2) var(--sp-2);
  border-top: 1px solid var(--border);
}
.ads-on .ad-sidebar ins.adsbygoogle { max-width: 300px; }

/* Support-level side rails (index only): flanking the 800px chat column,
   vertically centered. Off unless adsense.js booted (html.ads-on) AND the
   visitor picked "more ads" (html.ads-more). Position math pins each rail
   just outside the chat column, accounting for the sidebar width var:
   rail-left = 50vw + sidebar/2 - content/2 - rail(300) - gap(16). */
.ad-rail {
  display: none;
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 300px;
  flex-direction: column;
  align-items: center;
  padding: 0;
  border: none;
  z-index: 5;
}
.ads-on.ads-more body:not(.sidebar-collapsed) .ad-rail-l { left: calc(50vw + var(--sidebar-w) / 2 - var(--content-w) / 2 - 316px); }
.ads-on.ads-more body:not(.sidebar-collapsed) .ad-rail-r { right: calc(50vw + var(--sidebar-w) / 2 - var(--content-w) / 2 - 316px); }
/* Collapsed sidebar (44px) shifts the chat column toward the viewport edge,
   so the rails need a wider viewport before they clear it. */
.ads-on.ads-more body.sidebar-collapsed .ad-rail-l { left: calc(50vw + 22px - var(--content-w) / 2 - 316px); }
.ads-on.ads-more body.sidebar-collapsed .ad-rail-r { right: calc(50vw + 22px - var(--content-w) / 2 - 316px); }
/* Expanded sidebar is 264px (>1180px) — rails fit from 1200px up. */
@media (min-width: 1200px) {
  .ads-on.ads-more body:not(.sidebar-collapsed) .ad-rail { display: flex; }
}
/* Collapsed (44px) — chat column drifts left, rails need 1424px. */
@media (min-width: 1424px) {
  .ads-on.ads-more body.sidebar-collapsed .ad-rail { display: flex; }
}
/* 300x600 unit: skip on short viewports instead of clipping. */
@media (max-height: 639px) {
  .ads-on.ads-more .ad-rail { display: none !important; }
}

/* first-visit ads support-level ask */
.ads-ask-actions { justify-content: center; }
.ads-ask-note { margin-top: var(--sp-2); text-align: center; font-size: var(--fs-xs); color: var(--text-faint); }

.msg { position: relative; display: flex; flex-direction: column; gap: var(--sp-1); animation: fadeUp var(--dur-slow) var(--ease) both; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.msg .meta {
  display: flex; align-items: center; gap: var(--sp-2-5);
  font-size: var(--fs-micro); color: var(--text-faint); padding: 0 var(--sp-05);
}
.msg .meta .avatar {
  flex: none; width: 26px; height: 26px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bg-elev-2); border: 1px solid var(--border-strong);
  overflow: hidden;
}
.msg .meta .avatar.user { color: var(--accent-strong); }
.msg .meta .avatar img { width: 16px; height: 16px; display: block; }
.msg .meta .names { display: flex; flex-direction: column; line-height: 1.25; }
.msg .meta .names .who { font-weight: var(--wt-semi); letter-spacing: 0.02em; font-size: var(--fs-xs); }
.msg .meta .names .who.user { color: var(--accent-strong); }
/* JS emits `assistant` from the message role but `ai` for synthetic/error
   bubbles, so both spellings must be styled or one of them silently loses
   its rules. */
.msg .meta .names .who.ai,
.msg .meta .names .who.assistant { color: var(--text); }
.msg .meta .names .sub { font-size: var(--fs-label); color: var(--text-faint); }
.msg .meta .time { flex: 1; text-align: right; }
/* Action bar: one flat row of outline icons directly under every message,
   always visible (no hover gating), chrome-free like a bare icon strip. */
.msg .actions {
  position: static; margin-top: var(--sp-05);
  display: flex; align-items: center; gap: var(--sp-1);
  padding: 0;
  background: transparent; border: none; box-shadow: none;
  opacity: 1; visibility: visible; pointer-events: auto; transform: none;
}
.msg .actions .icon-btn {
  width: 31px; height: 31px;
  border-radius: 50%;
  background: transparent; border: none; box-shadow: none;
  color: var(--text);
}
.msg .actions .icon-btn svg { width: 18px; height: 18px; }
.msg .actions .icon-btn:hover {
  color: var(--accent-strong); background: var(--bg-hover);
}
.msg .actions .copy-btn {
  width: 31px; height: 31px; display: inline-flex; align-items: center; justify-content: center;
  background: transparent; border: none; box-shadow: none;
  color: var(--text); cursor: pointer;
  padding: 0; border-radius: 50%;
  transition: color var(--dur-fast), background var(--dur-fast);
}
.msg .actions .copy-btn:hover { color: var(--accent-strong); background: var(--bg-hover); }
.msg .actions .copy-btn.done { color: var(--ok); background: transparent; }

/* attachments + images + sources in messages */
.attach-preview { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin: 0 0 var(--sp-1-5); }
.attach-preview .ap-item {
  display: flex; align-items: center; gap: var(--sp-1-5);
  background: var(--bg-elev-2); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); padding: var(--sp-1); max-width: 240px;
}
.attach-preview .ap-item img {
  width: 40px; height: 40px; border-radius: var(--r-sm); object-fit: cover;
  border: 1px solid var(--border); cursor: zoom-in;
}
.attach-preview .ap-item span {
  font-size: var(--fs-micro); color: var(--text-dim);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.attach-row { display: flex; flex-wrap: wrap; gap: var(--sp-1-5); margin: 0 0 var(--sp-1-5); }
.attach-chip {
  display: inline-flex; align-items: center; gap: var(--sp-1-5);
  background: var(--bg-elev-2); border: 1px solid var(--border-strong);
  color: var(--text-dim); font-size: var(--fs-micro); padding: var(--sp-1) var(--sp-2-5) var(--sp-1) var(--sp-1);
  border-radius: var(--r-pill); max-width: 220px;
}
.attach-chip img {
  width: 20px; height: 20px; border-radius: 50%; object-fit: cover;
  border: 1px solid var(--border-strong);
}
.attach-chip span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.attach-chip svg { color: var(--text-faint); flex: none; }
.img-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--sp-2-5); margin: var(--sp-2-5) 0 var(--sp-05);
}
.img-grid img {
  width: 100%; border-radius: var(--r-sm);
  border: 1px solid var(--border); display: block;
  background: var(--code-bg);
  cursor: zoom-in;
  transition: border-color var(--dur), transform var(--dur-fast);
}
.img-grid img:hover { border-color: var(--border-strong); transform: scale(1.01); }

/* ============ streamed image reveal ============
   Images arriving mid-stream sit in .img-slot wrappers rebuilt from JS state
   each paint pass: .loading shows the skeleton sweep over an empty frame,
   then the first finished frame gets one blur-rise reveal (.enter) and never
   replays it on later rebuilds. */
.img-slot { position: relative; display: block; border-radius: var(--r-sm); }
.img-slot.loading { aspect-ratio: 1 / 1; overflow: hidden; }
.img-slot.loading img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; opacity: 0; pointer-events: none;
}
.img-slot.loading::after {
  content: ""; position: absolute; inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, var(--bg-hover), transparent);
  animation: skelSweep 1.3s ease-in-out infinite;
}
.img-slot.enter img { animation: imgIn 0.45s var(--ease); }
@keyframes imgIn {
  from { opacity: 0; transform: translateY(8px) scale(0.98); filter: blur(6px); }
}

/* Video generation output. Both of these were inline styles / an unstyled
   class in app.js — the status line had no rule at all, so queue progress
   rendered as unstyled body text. */
.vid-out {
  width: 100%; max-width: 100%; display: block;
  margin: var(--sp-2) 0 var(--sp-1);
  border-radius: var(--r-md); border: 1px solid var(--border);
  background: var(--code-bg);
}
.vid-status {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  margin: var(--sp-1) 0;
  font-size: var(--fs-xs); color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}
.vid-status::before {
  content: ""; flex: none; width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  animation: vidPulse 1.4s var(--ease) infinite;
}
@keyframes vidPulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}
.src-wrap { display: flex; flex-wrap: wrap; gap: var(--sp-1-5); margin: var(--sp-1) 0 0; align-items: center; }
.src-toggle {
  font-size: var(--fs-micro); color: var(--text-faint); background: transparent;
  border: 1px solid var(--border); border-radius: var(--r-pill);
  padding: var(--sp-1) var(--sp-2-5); cursor: pointer; transition: border-color var(--dur), color var(--dur);
}
.src-toggle:hover { color: var(--accent-strong); border-color: var(--accent-border); }
.src-links { display: none; flex: 1 1 100%; flex-wrap: wrap; gap: var(--sp-1-5); }
.src-links.open { display: flex; }
.src-chip {
  font-size: var(--fs-micro); color: var(--accent-strong);
  background: var(--accent-soft); border: 1px solid var(--accent-border);
  padding: var(--sp-1) var(--sp-3); border-radius: var(--r-pill); text-decoration: none;
  max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  transition: border-color var(--dur), background var(--dur);
}
.src-chip:hover {
  border-color: var(--accent-border-strong);
  background: rgb(var(--accent-rgb) / 0.2);
  text-decoration: none;
}

.msg .body {
  white-space: pre-wrap; word-break: break-word;
  border-radius: var(--r-md); padding: var(--sp-2-5) var(--sp-3-5);
}
.msg.user { align-items: flex-end; }
.msg.user .actions { left: auto; right: 0; }
.msg.user .body {
  background: var(--user-bg); border: 1px solid var(--border);
  max-width: min(80%, 640px); color: var(--text);
  transition: background var(--dur), border-color var(--dur);
}
.msg.ai .body,
.msg.assistant .body { width: 100%; padding: var(--sp-05) var(--sp-1-5) var(--sp-05); }
/* Kill the trailing block margin so the last line / Sources box ends near
   the bubble edge and the action pill below reads as attached, not floating. */
.msg.ai .body > :last-child,
.msg.assistant .body > :last-child { margin-bottom: 0; }

.msg .body.err {
  color: var(--err); background: var(--err-bubble);
  border: 1px solid var(--err-bubble-border);
}
.msg .body.err code { color: inherit; background: var(--err-code-bg); }

/* markdown */
.body p { margin: 0 0 var(--sp-2); }
.body p:last-child { margin-bottom: 0; }
.body .katex-display { margin: var(--sp-2) 0; overflow-x: auto; overflow-y: hidden; padding: var(--sp-05) 0; }
.body .katex { font-size: 1.06em; }
/* display-math shell + copy-LaTeX button (button injected post-sanitize) */
.body .math-blk { position: relative; display: block; }
.body .math-copy {
  position: absolute; top: 0; right: 0;
  display: inline-flex; align-items: center;
  padding: 3px var(--sp-1); border: 1px solid var(--border);
  border-radius: var(--r-xs); background: var(--bg-elev); color: var(--text-dim);
  cursor: pointer; opacity: 0; transition: opacity var(--dur), color var(--dur), border-color var(--dur);
}
.body .math-blk:hover .math-copy,
.body .math-blk:focus-within .math-copy { opacity: 1; }
.body .math-copy svg { display: block; }
.body .math-copy .ic-check { display: none; }
.body .math-copy.done { color: var(--accent-strong); border-color: var(--accent-strong); }
.body .math-copy.done .ic-check { display: block; }
.body .math-copy.done .ic-copy { display: none; }
.body h1, .body h2, .body h3, .body h4 {
  margin: var(--sp-3-5) 0 var(--sp-1-5); line-height: 1.3; letter-spacing: -0.01em;
}
.body h1 { font-size: var(--fs-lg); } .body h2 { font-size: var(--fs-h3); } .body h3 { font-size: var(--fs-body); } .body h4 { font-size: var(--fs-sm); }
.body ul, .body ol { margin: 0 0 var(--sp-2); padding-left: var(--sp-6); }
.body li { margin: var(--sp-05) 0; }
.body a { color: var(--accent-strong); text-decoration: none; }
.body a:hover { text-decoration: underline; }
.body blockquote {
  margin: var(--sp-2) 0; padding: var(--sp-1-5) var(--sp-3-5); border-left: 3px solid var(--border-strong);
  color: var(--text-dim); background: var(--bg-elev); border-radius: 0 var(--r-sm) var(--r-sm) 0;
}
.body hr { border: none; border-top: 1px solid var(--border); margin: var(--sp-3) 0; }
.body code:not(pre code) {
  font: 0.88em var(--mono); background: var(--code-inline-bg);
  padding: 1.5px var(--sp-1-5); border-radius: var(--r-xs);
}
.body pre {
  margin: var(--sp-2-5) 0; border-radius: var(--r-sm); overflow: hidden;
  border: 1px solid var(--border); background: var(--code-bg);
}
.body pre .code-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-1-5) var(--sp-3); background: var(--code-head-bg); border-bottom: 1px solid var(--border);
  font: var(--fs-micro) var(--mono); color: var(--text-faint);
}
.body pre .code-head .lang { text-transform: lowercase; letter-spacing: 0.04em; }
.body pre .code-head button {
  background: none; border: 1px solid var(--border-strong); color: var(--text-dim);
  font: var(--fs-label) var(--font); padding: var(--sp-05) var(--sp-2-5); border-radius: var(--r-xs); cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast);
}
.body pre .code-head button:hover { color: var(--text); border-color: var(--code-btn-hover); }
.body pre .code-head button.done { color: var(--ok); border-color: var(--ok); }
.body pre .code-head .code-actions { display: flex; align-items: center; gap: var(--sp-1-5); }
.body pre code {
  display: block; padding: var(--sp-3) var(--sp-3-5); font: var(--fs-xs)/1.6 var(--mono);
  white-space: pre; overflow-x: auto;
}
.body pre code:not(.hljs) { background: var(--code-bg); }
.body table { border-collapse: collapse; margin: var(--sp-2-5) 0; width: 100%; font-size: var(--fs-sm); }
.body th, .body td { border: 1px solid var(--border-strong); padding: var(--sp-1-5) var(--sp-3); text-align: left; }
.body th { background: var(--bg-elev-2); font-weight: var(--wt-semi); }

.cursor {
  display: inline-block; width: 8px; height: 16px; margin-left: var(--sp-05);
  background: var(--accent); border-radius: var(--r-2xs); vertical-align: -2px;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.thinking {
  display: flex; align-items: center; gap: var(--sp-2);
  color: var(--text-faint); font-size: var(--fs-sm); padding: var(--sp-1-5);
}
.thinking .bar { display: flex; gap: var(--sp-1); }
.thinking .bar i {
  width: 5px; height: 5px; border-radius: 50%; background: var(--accent);
  animation: hop 1.1s ease-in-out infinite;
}
.thinking .bar i:nth-child(2) { animation-delay: var(--dur); }
.thinking .bar i:nth-child(3) { animation-delay: var(--dur-slow); }
@keyframes hop { 0%, 60%, 100% { transform: translateY(0); opacity: 0.4; } 30% { transform: translateY(-4px); opacity: 1; } }
.thinking .think-label { transition: opacity 0.25s var(--ease); }
.thinking .think-label.swap { opacity: 0; }

/* While an assistant bubble streams, a blinking accent caret rides the last
   rendered block — pure CSS, so markdown/math repaints never drop it. */
.msg.streaming .body > :last-child::after {
  content: "";
  display: inline-block;
  width: 8px; height: 16px; margin-left: var(--sp-05);
  background: var(--accent); border-radius: var(--r-2xs);
  vertical-align: -2px;
  animation: blink 1s step-end infinite;
}

@media (prefers-reduced-motion: reduce) {
  .thinking .think-label { transition: none; }
  .msg.streaming .body > :last-child::after { animation: none; }
  .img-slot.enter img { animation: none; }
  .img-slot.loading::after { animation: none; }
}

/* empty state — deliberately off the centre axis */
.empty-state {
  padding: clamp(40px, 9vh, 88px) var(--sp-6) var(--sp-8);
  max-width: 620px;
}
.empty-state .glyph {
  width: 76px; height: 76px; margin: 0 0 var(--sp-5); border-radius: var(--r-xl);
  border: 1px solid var(--accent-border);
  overflow: hidden; box-shadow: var(--e3);
  transform: rotate(-3deg);
  animation: glyphFloat 6s ease-in-out infinite;
}
@keyframes glyphFloat {
  0%, 100% { transform: rotate(-3deg) translateY(0); }
  50% { transform: rotate(-1deg) translateY(-4px); }
}
.empty-state .glyph img { width: 100%; height: 100%; object-fit: contain; display: block; background: var(--bg-elev); }
.empty-state h2 {
  font-size: var(--fs-h1); line-height: var(--lh-h1); letter-spacing: var(--tr-h1);
  font-weight: var(--wt-semi); margin-bottom: var(--sp-2);
}
.empty-state p {
  color: var(--text-dim); font-size: var(--fs-body);
  max-width: 46ch; margin: 0 0 var(--sp-6);
}
.empty-state .providers {
  display: flex; gap: var(--sp-2); margin: 0 0 var(--sp-6);
  padding-left: var(--sp-05);
}
.empty-state .providers img {
  width: 28px; height: 28px; border-radius: var(--r-sm); background: var(--bg-elev-2);
  border: 1px solid var(--border); padding: var(--sp-1-5);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.empty-state .providers img:hover { transform: translateY(-2px); border-color: var(--border-strong); }
.empty-state .providers img.onlight { background: var(--logo-plate); }
.empty-state .providers img.ondark { background: var(--logo-plate-dark); }
.chips { display: flex; flex-wrap: wrap; gap: var(--sp-2); max-width: 520px; }
.chips .chip {
  background: var(--bg-elev); border: 1px solid var(--border); color: var(--text-dim);
  font-size: var(--fs-xs); padding: var(--sp-2) var(--sp-3-5); height: auto; border-radius: var(--r-pill);
  cursor: pointer; text-align: left;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease),
    background var(--dur) var(--ease), transform var(--dur-fast) var(--ease);
}
.chips .chip:hover { border-color: var(--accent-border-strong); color: var(--accent-strong); background: var(--accent-faint); }
.tip-strip {
  display: flex; align-items: flex-start; gap: var(--sp-2-5);
  margin-top: var(--sp-6); padding: var(--sp-2-5) var(--sp-3);
  background: var(--bg-elev); border: 1px dashed var(--border-strong);
  border-radius: var(--r-sm); color: var(--text-dim); font-size: var(--fs-xs);
  line-height: 1.55; max-width: 520px;
}
.tip-strip .tip-label {
  flex: none; font-weight: var(--wt-semi); color: var(--accent-strong);
  text-transform: uppercase; letter-spacing: 0.06em; font-size: var(--fs-label);
  padding-top: var(--sp-05);
}
.tip-strip .tip-text { flex: 1; }
.tip-strip .tip-dismiss {
  flex: none; background: none; border: none; color: var(--text-faint);
  font-size: var(--fs-h3); line-height: 1; cursor: pointer; padding: var(--sp-05) var(--sp-1);
  border-radius: var(--r-xs); transition: color var(--dur-fast), background var(--dur-fast);
}
.tip-strip .tip-dismiss:hover { color: var(--text); background: var(--bg-hover); }

/* ============ composer ============ */
/* Toolbar, attachments and the input share one elevated shell instead of
   floating as three unrelated strips. Bottom padding runs a touch larger
   than the top so the block reads optically centred. */
.composer-zone {
  padding: var(--sp-2) var(--sp-6) var(--sp-4);
  background: var(--bg);
  transition: background var(--dur-slow) var(--ease);
}
.composer-shell {
  max-width: var(--content-w); margin: 0 auto;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--r-lg);
  box-shadow: var(--e2), inset 0 1px 0 rgb(255 255 255 / 0.03);
  padding: var(--sp-2) var(--sp-3) var(--sp-2-5);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
    background var(--dur-slow) var(--ease);
}
.composer-shell:focus-within {
  border-color: var(--accent-border-strong);
  box-shadow: var(--e3), 0 0 0 3px var(--accent-focus-ring), inset 0 1px 0 rgb(255 255 255 / 0.05);
}
.toolbar {
  margin: 0 0 var(--sp-2);
  display: flex; align-items: center; gap: var(--sp-1);
}
.toolbar-spacer { flex: 1; }
.tool-btn {
  display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: var(--r-sm);
  background: none; border: 1px solid var(--border);
  color: var(--text-faint); cursor: pointer;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
    background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.tool-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--bg-hover); }
.tool-btn:active { transform: scale(0.94); }
.tool-btn.active {
  color: var(--accent-strong); border-color: var(--accent-border-strong);
  background: var(--accent-soft);
}
.tool-btn:disabled { opacity: 0.4; cursor: default; }
#mic-btn.active { color: var(--err-strong); border-color: var(--err); background: var(--err-soft); }
#mic-btn.active svg { animation: micPulse 1.2s ease-in-out infinite; }
@keyframes micPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.55; }
}
.img-dd { position: relative; }
.img-chips {
  margin: 0 0 var(--sp-2);
  display: flex; flex-wrap: wrap; gap: var(--sp-1);
}
.img-chips[hidden] { display: none; }
.img-chips.off { opacity: 0.45; }
.chip-dd { position: relative; }
.chip-dd .chip {
  display: inline-flex; align-items: center; gap: var(--sp-1-5);
  height: 28px; padding: 0 var(--sp-2-5); border-radius: var(--r-pill);
  background: var(--bg-elev); border: 1px solid var(--border);
  color: var(--text-dim); font-size: var(--fs-xs); cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast);
}
.chip-dd .chip:hover { color: var(--text); border-color: var(--border-strong); background: var(--bg-hover); }
.chip:active { transform: translateY(1px); }
.chip b { font-weight: var(--wt-semi); color: var(--text); white-space: nowrap; max-width: 130px; overflow: hidden; text-overflow: ellipsis; }
.chip-caret { font-size: var(--fs-nano); color: var(--text-faint); opacity: 0.8; }
.chip-menu {
  position: absolute; bottom: calc(100% + 4px); left: 0; z-index: var(--z-dropdown);
  min-width: 160px; max-height: 250px; overflow-y: auto;
  background: var(--bg-elev-2); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); box-shadow: var(--e3); padding: var(--sp-1-5);
  display: none; flex-direction: column; gap: var(--sp-05);
}
.chip-dd.open .chip-menu { display: flex; }
.chip-opt {
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-2-5);
  text-align: left; background: none; border: none;
  color: var(--text-dim); padding: var(--sp-2) var(--sp-2-5); border-radius: var(--r-sm);
  cursor: pointer; font-size: var(--fs-xs); line-height: 1.35; white-space: nowrap;
}
.chip-opt:hover { background: var(--bg-hover); color: var(--text); }
.chip-opt.selected { background: var(--accent-soft); color: var(--accent-strong); }
.chip-check { color: var(--accent); font-size: var(--fs-micro); }
.attachments {
  margin: 0 0 var(--sp-2);
  display: flex; flex-wrap: wrap; gap: var(--sp-2);
}
.att-chip {
  display: flex; align-items: center; gap: var(--sp-2);
  background: var(--bg-elev); border: 1px solid var(--border-strong);
  border-radius: var(--r-md); padding: var(--sp-1) var(--sp-1-5) var(--sp-1) var(--sp-1);
  font-size: var(--fs-xs); color: var(--text-dim); max-width: 260px;
}
.att-chip img {
  width: 30px; height: 30px; border-radius: var(--r-sm); object-fit: cover;
  border: 1px solid var(--border);
}
.att-chip span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.att-rm {
  flex: none; width: 20px; height: 20px; border-radius: var(--r-xs);
  background: none; border: none; color: var(--text-faint); cursor: pointer;
  font-size: var(--fs-micro); display: grid; place-items: center;
}
.att-rm:hover { background: var(--err-soft); color: var(--err); }
.composer {
  display: flex; align-items: flex-end; gap: var(--sp-2);
  background: none; border: none; padding: 0;
}
.composer textarea {
  /* The only outline: none left in the file, and it has a real replacement —
     .composer-shell:focus-within draws the ring around the whole shell. */
  flex: 1; resize: none; background: none; border: none; outline: none;
  color: var(--text); font: var(--fs-body) / 1.5 var(--font);
  max-height: 180px; min-height: 24px; padding: var(--sp-1) var(--sp-05);
}
.composer textarea::placeholder { color: var(--text-faint); }
.composer .mic-btn {
  flex: none; width: 32px; height: 32px; border-radius: var(--r-sm);
  border: 1px solid var(--border-strong); background: var(--bg-elev-2);
}
.composer .mic-btn:hover { background: var(--bg-hover); }
.send-btn {
  flex: none; width: 32px; height: 32px; border: none; border-radius: var(--r-sm);
  background: var(--accent); color: var(--on-accent); cursor: pointer;
  display: grid; place-items: center;
  box-shadow: 0 2px 8px rgb(var(--accent-rgb) / 0.25);
  transition: background var(--dur), transform var(--dur) cubic-bezier(0.34, 1.56, 0.64, 1),
    box-shadow var(--dur) var(--ease);
}
.send-btn:hover {
  background: var(--accent-strong);
  box-shadow: 0 4px 14px rgb(var(--accent-rgb) / 0.35);
}
.send-btn:active { transform: scale(0.92); }
.send-btn:disabled { background: var(--btn-disabled-bg); color: var(--text-faint); cursor: default; transform: none; box-shadow: none; }
.stop-btn {
  flex: none; width: 32px; height: 32px; border-radius: var(--r-sm); cursor: pointer;
  border: 1px solid var(--err); background: var(--err-soft); color: var(--err);
  display: none; place-items: center;
  animation: fadeUp var(--dur) ease;
}
.stop-btn:hover { background: rgb(var(--err-rgb) / 0.22); border-color: var(--err-strong); }
.stop-btn:active { transform: scale(0.96); }
.stop-btn.show { display: grid; }
.composer-hint {
  margin: 0; text-align: right;
  font-size: var(--fs-micro); color: var(--text-faint);
}
.toolbar .composer-hint { color: var(--text-faint); }

/* ============ drop overlay ============ */
.drop-overlay {
  position: fixed; inset: 0; z-index: var(--z-drop);
  display: none; place-items: center;
  background: var(--accent-faint);
  pointer-events: none;
}
.drop-overlay.show { display: grid; }
.drop-overlay .drop-inner {
  display: flex; flex-direction: column; align-items: center; gap: var(--sp-2-5);
  padding: var(--sp-10) var(--sp-16); border-radius: var(--r-lg);
  border: 2px dashed var(--accent-border-strong);
  background: var(--bg-elev); color: var(--accent-strong);
  font-size: var(--fs-sm); font-weight: var(--wt-semi);
  box-shadow: var(--e3);
  animation: ddIn var(--dur) ease;
}

/* ============ modal ============ */
/* The dialog primitives (.modal-backdrop, .modal, .m-desc, .m-actions and its
   button variants) live in components.css, shared with the landing page.
   Only the chat-app-specific parts stay here. */
.modal textarea {
  width: 100%; min-height: 160px; resize: vertical;
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: var(--sp-3);
  font: var(--fs-xs) / 1.6 var(--mono);
  transition: border-color var(--dur) var(--ease);
}
.modal textarea:focus { border-color: var(--accent); }

/* ============ donate modal ============
   Single definition. A second, conflicting block used to live near the end of
   this file and won on every overlap — it forced the wallet address onto one
   nowrap line with an ellipsis, so the string could not be read to verify it.
   Addresses wrap on purpose here. */
.donate-modal { max-width: 380px; }
.donate-list { display: flex; flex-direction: column; gap: var(--sp-2); margin: var(--sp-4) 0; }
.donate-row {
  display: flex; flex-direction: column; gap: var(--sp-1);
  padding: var(--sp-2) var(--sp-3); border-radius: var(--r-sm);
  background: var(--bg-elev); border: 1px solid var(--border);
}
.donate-net {
  font: var(--wt-semi) var(--fs-label) / 1.4 var(--font);
  letter-spacing: var(--tr-label); text-transform: uppercase;
  color: var(--text-faint); user-select: none;
}
.donate-tokens { font-size: var(--fs-micro); color: var(--text-faint); }
.donate-line { display: flex; align-items: stretch; gap: var(--sp-2); min-width: 0; }
.donate-addr {
  flex: 1; min-width: 0; align-self: center;
  font: var(--fs-xs) / 1.5 var(--mono); color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--r-sm);
  padding: var(--sp-2) var(--sp-2-5); word-break: break-all; user-select: all;
  white-space: pre-wrap;
}
.donate-copy {
  flex: none; align-self: center;
  padding: var(--sp-2) var(--sp-3); border-radius: var(--r-sm);
  background: var(--accent-faint); border: 1px solid var(--accent-border);
  color: var(--accent); font: var(--wt-semi) var(--fs-xs) / 1 var(--font);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
    color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.donate-copy:hover { background: var(--accent-soft); border-color: var(--accent-border-strong); }
.donate-copy:active { transform: translateY(1px); }
.donate-copy.done { color: var(--ok); border-color: var(--ok); background: rgb(var(--ok-rgb) / 0.1); }
.donate-warn {
  margin: var(--sp-3) 0 var(--sp-2-5); font-size: var(--fs-xs); color: var(--err);
  line-height: 1.5; padding-left: var(--sp-5); position: relative;
}
.donate-warn::before {
  content: "⚠"; position: absolute; left: 0; top: 0;
  font-size: var(--fs-micro); line-height: 1.5;
}
.donate-discord { margin: 0 0 var(--sp-1); font-size: var(--fs-xs); line-height: 1.5; color: var(--text-dim); }
.donate-discord a { color: var(--accent-strong); text-decoration: none; }
.donate-discord a:hover { text-decoration: underline; }

/* account chip (topbar, top-right) — see components.css */

/* notification bell (topbar, next to account chip) */
.notif-btn {
  position: relative; flex: none; display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: var(--r-md);
  background: transparent; border: 1px solid transparent;
  color: var(--text-dim); cursor: pointer;
  transition: background var(--dur-fast), border-color var(--dur-fast), color var(--dur-fast), transform var(--dur-fast) var(--ease);
}
.notif-btn:hover { background: var(--bg-hover); border-color: var(--border-strong); color: var(--text); }
.notif-btn:active { transform: scale(0.94); }
.notif-badge[hidden] { display: none; }
.notif-badge {
  position: absolute; top: -3px; right: -3px;
  min-width: 16px; height: 16px; padding: 0 var(--sp-1); border-radius: var(--r-pill);
  display: grid; place-items: center;
  background: var(--err); color: var(--on-solid);
  font-size: var(--fs-nano); font-weight: var(--wt-bold); line-height: 1;
  font-variant-numeric: tabular-nums;
  box-shadow: 0 0 0 2px var(--bg);
}

/* account modal — see components.css */
.tips-modal { width: min(380px, 100%); }
.tips-off-modal { width: min(360px, 100%); }
.tips-off-modal .m-actions { margin-top: var(--sp-3-5); }

/* like / dislike — one thumb control with a choice popover, same size as
   the other action icons; tooltip carries "rate this reply". */
.msg .actions .rate-wrap { position: relative; display: inline-flex; }
.msg .actions .rate-btn {
  width: 31px; height: 31px;
  border-radius: 50%;
  color: var(--text);
}
.msg .actions .rate-btn .rate-ic {
  width: 100%; height: 100%;
  display: inline-flex; align-items: center; justify-content: center;
}
.msg .actions .rate-btn .rate-ic svg { width: 18px; height: 18px; }
.msg .actions .rate-btn.on-good { color: var(--ok); }
.msg .actions .rate-btn.on-bad { color: var(--err); }
.rate-pop {
  position: absolute; top: calc(100% + 6px); left: -6px; z-index: var(--z-dropdown);
  display: flex; flex-direction: column; gap: 2px;
  min-width: 180px; padding: var(--sp-1);
  background: var(--bg-elev-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md); box-shadow: var(--e2);
}
.rate-pop .rate-opt {
  display: flex; align-items: center; gap: var(--sp-1-5);
  padding: var(--sp-2) var(--sp-2); border-radius: var(--r-sm);
  background: transparent; border: none; cursor: pointer;
  color: var(--text); font-size: var(--fs-sm); text-align: left;
  transition: background var(--dur-fast);
}
.rate-pop .rate-opt:hover { background: var(--bg-hover); }
.rate-pop .rate-opt svg { width: 18px; height: 18px; flex: none; }
.fb-modal, .compose-modal { width: min(480px, 100%); }
.fb-modal .fb-reasons {
  display: flex; flex-wrap: wrap; gap: var(--sp-1-5); margin-bottom: var(--sp-3);
}
.fb-modal .fb-reason {
  padding: var(--sp-1-5) var(--sp-3); border-radius: var(--r-pill); cursor: pointer;
  background: var(--bg); border: 1px solid var(--border);
  color: var(--text-dim); font: var(--fs-xs) var(--font);
  transition: border-color var(--dur-fast), color var(--dur-fast), background var(--dur-fast);
}
.fb-modal .fb-reason:hover { border-color: var(--accent-border); color: var(--text); }
.fb-modal .fb-reason.sel {
  background: var(--accent-soft); border-color: var(--accent);
  color: var(--accent-strong); font-weight: var(--wt-semi);
}
.fb-modal .fb-text, .compose-modal .compose-text {
  width: 100%; min-height: 80px; resize: vertical;
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: var(--sp-3);
  font: var(--fs-xs) / 1.6 var(--font);
  transition: border-color var(--dur) var(--ease);
}
.fb-modal .fb-text:focus, .compose-modal .compose-text:focus { border-color: var(--accent); }

/* Out of flow on purpose: in-flow it sits between the bubble and the
   action pill's top:100% anchor and shoves the pill ~30px away from the
   reply. Float it below the pill instead (~28px tall). */
.fb-status {
  position: absolute; top: 100%; margin: 34px 0 0 var(--sp-05);
  font-size: var(--fs-micro); color: var(--text-faint);
  padding: var(--sp-1) var(--sp-2-5); border-left: 2px solid var(--accent-border);
  background: var(--accent-faint); border-radius: 0 var(--r-xs) var(--r-xs) 0;
}
.fb-status b { color: var(--accent-strong); font-weight: var(--wt-semi); }
.myfb-modal { width: min(520px, 100%); }
.myfb-modal .myfb-list {
  max-height: 46dvh; overflow-y: auto; display: flex; flex-direction: column;
  gap: var(--sp-2); padding-right: var(--sp-05);
}
.myfb-item {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: var(--sp-2-5) var(--sp-3);
}
.myfb-top { display: flex; align-items: center; gap: var(--sp-1-5); margin-bottom: var(--sp-1-5); flex-wrap: wrap; }
.myfb-badge {
  font-size: var(--fs-nano); font-weight: var(--wt-bold); letter-spacing: 0.07em;
  padding: var(--sp-05) var(--sp-2); border-radius: var(--r-pill); text-transform: uppercase;
}
.myfb-b-fb { background: var(--accent-soft); color: var(--accent-strong); }
.myfb-b-sug { background: rgb(var(--warn-rgb) / 0.14); color: var(--warn); border: 1px solid rgb(var(--warn-rgb) / 0.35); }
.myfb-s-new { background: var(--bg-hover); color: var(--text-dim); border: 1px solid var(--border); }
.myfb-s-seen { background: var(--accent-faint); color: var(--accent-strong); border: 1px solid var(--accent-border); }
.myfb-s-replied { background: rgb(var(--ok-rgb) / 0.14); color: var(--ok); border: 1px solid rgb(var(--ok-rgb) / 0.35); }
.myfb-time { margin-left: auto; font-size: var(--fs-micro); color: var(--text-faint); font-variant-numeric: tabular-nums; }
.myfb-text { font-size: var(--fs-sm); color: var(--text); white-space: pre-wrap; word-break: break-word; }
.myfb-reply {
  margin-top: var(--sp-2); padding: var(--sp-2) var(--sp-2-5); border-left: 2px solid var(--ok);
  background: rgb(var(--ok-rgb) / 0.08); border-radius: 0 var(--r-xs) var(--r-xs) 0;
  font-size: var(--fs-xs); color: var(--text-dim);
}
.myfb-reply b { color: var(--ok); font-weight: var(--wt-semi); display: block; margin-bottom: var(--sp-05); }
.myfb-note { margin-top: var(--sp-1-5); font-size: var(--fs-xs); color: var(--text-dim); font-style: italic; word-break: break-word; }
.myfb-sec {
  font-size: var(--fs-micro); font-weight: var(--wt-bold); letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--text-faint); margin: var(--sp-3-5) 0 var(--sp-1-5);
}
.myfb-empty { color: var(--text-faint); text-align: center; padding: var(--sp-5) 0; font-style: italic; }

/* ============ voice modal ============ */
.voice-modal { width: min(440px, 100%); }
.v-row {
  display: flex; align-items: center; gap: var(--sp-2-5);
  padding: var(--sp-2-5) 0; font-size: var(--fs-sm); color: var(--text-dim);
}
.v-row input[type="range"] { flex: 1; accent-color: var(--accent); }
.v-row b { min-width: 34px; text-align: right; font-variant-numeric: tabular-nums; color: var(--text); }
.v-row select {
  width: 100%; margin-top: var(--sp-1-5);
  background: var(--bg); color: var(--text); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: var(--sp-2) var(--sp-2-5); font: var(--fs-xs) var(--font);
}
.v-row select:focus { border-color: var(--accent); }

/* ============ voice reading indicator ============ */
.voice-ind {
  order: 99; margin-top: var(--sp-2); display: flex; align-items: flex-start; gap: var(--sp-2);
  font-size: var(--fs-xs); color: var(--accent-strong);
  background: var(--accent-soft); border: 1px solid var(--accent-border-strong);
  border-radius: var(--r-sm); padding: var(--sp-1-5) var(--sp-2-5);
  max-height: 60px; overflow: hidden;
}
.voice-ind .v-ind-text { flex: 1; min-width: 0; word-break: break-word; max-height: 46px; overflow: hidden; }
.voice-ind::before { content: ""; flex: none; width: 7px; height: 7px; border-radius: 50%; background: currentColor; margin-top: var(--sp-1); animation: micPulse 1s ease-in-out infinite; }
.v-ind-stop { flex: none; display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; padding: 0; border: none; border-radius: var(--r-xs); background: transparent; color: inherit; cursor: pointer; opacity: .8; }
.v-ind-stop:hover { background: var(--accent-strong); color: var(--on-accent); opacity: 1; }

/* ============ my files modal ============ */
.files-modal { width: min(680px, 100%); }
.files-modal h3 { display: flex; align-items: center; gap: var(--sp-2); }
.files-loading { text-align: center; color: var(--text-faint); font-size: var(--fs-xs); padding: var(--sp-6) 0; }
.files-grid { max-height: 62dvh; overflow-y: auto; display: flex; flex-direction: column; gap: var(--sp-4); }
.f-empty { text-align: center; color: var(--text-faint); font-size: var(--fs-sm); padding: var(--sp-8) 0; }
.f-sec-title {
  font-size: var(--fs-micro); font-weight: var(--wt-semi); letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--text-faint); margin-bottom: var(--sp-2);
}
.f-none { color: var(--text-faint); font-size: var(--fs-xs); padding: var(--sp-1) 0 var(--sp-3); }
.f-imgs {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--sp-2-5);
}
.f-tile {
  background: var(--bg-elev-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: var(--sp-1-5); overflow: hidden;
  transition: border-color var(--dur-fast);
}
.f-tile:hover { border-color: var(--border-strong); }
.f-thumb {
  width: 100%; aspect-ratio: 1; object-fit: cover;
  border-radius: var(--r-xs); cursor: zoom-in; background: var(--code-bg);
  display: block;
}
.f-name {
  font-size: var(--fs-xs); color: var(--text); margin-top: var(--sp-1-5);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.f-meta { font-size: var(--fs-label); color: var(--text-faint); margin-top: var(--sp-05); font-variant-numeric: tabular-nums; }
.f-actions {
  display: flex; gap: var(--sp-05); margin-top: var(--sp-1-5); justify-content: flex-end;
}
.f-actions .icon-btn { width: 26px; height: 26px; }
.f-actions .icon-btn.danger:hover { color: var(--err); }
.f-actions .icon-btn.confirming {
  color: var(--err); background: var(--err-soft); font-size: var(--fs-label); width: auto; padding: 0 var(--sp-1-5);
}
.f-rows { display: flex; flex-direction: column; gap: var(--sp-1-5); }
.f-row {
  display: flex; align-items: center; gap: var(--sp-2-5);
  background: var(--bg-elev-2); border: 1px solid var(--border);
  border-radius: var(--r-sm); padding: var(--sp-2) var(--sp-2-5);
  transition: border-color var(--dur-fast);
}
.f-row:hover { border-color: var(--border-strong); }
.f-ic { font-size: var(--fs-h3); flex: none; opacity: 0.85; }
.f-main { flex: 1; min-width: 0; }
.f-row .f-name { margin-top: 0; }

/* ============ incognito button ============ */
.incog-btn {
  position: relative; display: grid; place-items: center;
  width: 32px; height: 32px; border-radius: var(--r-pill);
  background: none; border: 1px solid var(--border);
  color: var(--text-faint); cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast);
}
.share-top-btn {
  display: grid; place-items: center;
  width: 32px; height: 32px; border-radius: var(--r-pill);
  background: none; border: 1px solid var(--border);
  color: var(--text-faint); cursor: pointer;
  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast);
}
.share-top-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--bg-hover); }
.share-top-btn:active { transform: scale(0.94); }
.keys-top-btn{
  display:inline-flex;align-items:center;gap:6px;
  height:32px;padding:0 12px;border-radius:var(--r-pill);
  background:none;border:1px solid var(--border);
  color:var(--text-faint);cursor:pointer;text-decoration:none;
  transition:color var(--dur-fast),border-color var(--dur-fast),background var(--dur-fast),transform var(--dur-fast);
}
.keys-top-label{ font-size:var(--fs-sm);font-weight:var(--wt-semi);white-space:nowrap; }
.keys-top-btn:hover{ color:var(--text);border-color:var(--border-strong);background:var(--bg-hover); }
.keys-top-btn:active{ transform:scale(0.94); }
.incog-btn:hover { color: var(--text); border-color: var(--border-strong); background: var(--bg-hover); }
.incog-btn:active { transform: scale(0.94); }
.incog-btn.active {
  color: var(--accent-strong); border-color: var(--accent-border-strong);
  background: var(--accent-soft);
}
.incog-btn .incog-dot {
  position: absolute; top: -1px; right: -1px; width: 8px; height: 8px;
  border-radius: 50%; background: transparent;
  border: 2px solid var(--bg); transition: background var(--dur-fast);
}
.incog-btn.active .incog-dot { background: var(--accent); }
.conv-title.incog { color: var(--accent-strong); }

/* ============ discord button ============ */
.discord-btn {
  display: grid; place-items: center;
  width: 32px; height: 32px; border-radius: var(--r-pill);
  background: var(--discord); border: 1px solid transparent;
  color: var(--on-solid); cursor: pointer; text-decoration: none;
  box-shadow: 0 1px 4px rgb(var(--discord-rgb) / 0.35);
  transition: background var(--dur-fast), transform var(--dur-fast), box-shadow var(--dur-fast);
}
.discord-btn:hover {
  background: var(--discord-strong); color: var(--on-solid);
  box-shadow: 0 0 0 3px rgb(var(--discord-rgb) / 0.25), 0 2px 8px rgb(var(--discord-rgb) / 0.45);
}
.discord-btn:active { transform: scale(0.94); }

/* ============ lightbox ============ */
.lightbox {
  position: fixed; inset: 0; z-index: var(--z-lightbox); background: var(--lb-bg);
  display: none; align-items: center; justify-content: center;
  user-select: none; cursor: zoom-out;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 92vw; max-height: 88dvh; border-radius: var(--r-sm);
  box-shadow: 0 12px 48px rgb(var(--shadow-rgb) / 0.6);
  cursor: grab; object-fit: contain;
  transition: transform var(--dur-fast) ease;
  will-change: transform;
}
.lightbox img.dragging { cursor: grabbing; }
.lightbox .lb-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--lb-chrome-border);
  background: var(--lb-chrome-bg); color: var(--lb-chrome-fg); font-size: var(--fs-lg); cursor: pointer;
  display: grid; place-items: center; transition: background var(--dur-fast);
}
.lightbox .lb-btn:hover { background: var(--lb-chrome-bg-hover); }
.lightbox .lb-btn:active { transform: translateY(-50%) scale(0.92); }
.lightbox .lb-prev { left: 18px; }
.lightbox .lb-next { right: 18px; }
.lightbox .lb-close {
  position: absolute; top: 18px; right: 18px; width: 36px; height: 36px;
  border-radius: 50%; border: 1px solid var(--lb-chrome-border);
  background: var(--lb-chrome-bg); color: var(--lb-chrome-fg); font-size: var(--fs-body); cursor: pointer;
  transition: background var(--dur-fast), transform var(--dur-fast) var(--ease);
}
.lightbox .lb-close:hover { background: var(--lb-chrome-bg-hover); }
.lightbox .lb-close:active { transform: scale(0.92); }
.lightbox .lb-count {
  position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%);
  color: var(--lb-chrome-dim); font: var(--fs-xs) var(--mono);
  font-variant-numeric: tabular-nums;
  background: var(--lb-count-bg); padding: var(--sp-1) var(--sp-3); border-radius: var(--r-pill);
}

/* ============ misc ============ */
.jump-btn {
  position: fixed; right: var(--sp-6); bottom: calc(var(--composer-h) + var(--sp-4)); z-index: var(--z-jump);
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--bg-elev-2); border: 1px solid var(--border-strong); color: var(--text-dim);
  cursor: pointer; display: none; place-items: center; font-size: var(--fs-h3);
  box-shadow: var(--e3); transition: color var(--dur);
}
.jump-btn:hover { color: var(--text); border-color: var(--accent-border); }
.jump-btn:active { transform: scale(0.92); }
.jump-btn.show { display: grid; }

.toast {
  position: fixed; bottom: 26px; left: 50%; transform: translate(-50%, 12px);
  z-index: var(--z-toast); background: var(--bg-elev-2); border: 1px solid var(--border-strong);
  color: var(--text); font-size: var(--fs-sm); padding: var(--sp-2-5) var(--sp-5); border-radius: var(--r-md);
  box-shadow: var(--e3); opacity: 0; pointer-events: none;
  transition: opacity var(--dur), transform var(--dur); max-width: 80vw;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast.err { border-color: var(--err-border); color: var(--err); }

/* ============ responsive ============ */
@media (max-width: 1180px) {
  :root { --sidebar-w: 228px; }
  .msgs-inner { padding: 0 var(--sp-5); }
}

@media (max-width: 860px) {
  #sidebar {
    position: fixed; top: 0; left: -100%;
    box-shadow: var(--e3);
  }
  #ad-welcome { display: none; }
  /* Drawer hides via `left`, not `transform`: a transformed ancestor would
     become the containing block for `position: fixed`, which the mobile
     bottom-sheet panels (theme/lang live inside #sidebar) depend on. */
  #sidebar.open { left: 0; }
  #side-close { display: grid; }
.menu-btn { display: none; }
#side-collapse { display: none; }
  .scrim.show { opacity: 1; pointer-events: auto; }
  .acct-chip .acct-txt { display: none; }
  .acct-chip { padding: 0 var(--sp-1-5); }
  .msgs-inner { padding: 0 var(--sp-4); }
  .composer-zone { padding: var(--sp-2) var(--sp-3) var(--sp-3); }
  .msg.user .body { max-width: 92%; }
  .lightbox .lb-prev { left: 8px; }
  .lightbox .lb-next { right: 8px; }
  .empty-state { padding-top: var(--sp-8); }
  .empty-state h2 { font-size: var(--fs-h2); line-height: var(--lh-h2); letter-spacing: var(--tr-h2); }
}

/* ============ mobile: compact topbar + bottom sheets ============ */
@media (max-width: 640px) {
  .topbar { padding: var(--sp-2) var(--sp-3); gap: var(--sp-2); }
  .topbar .conv-title { font-size: var(--fs-body); }
  .topbar-right { gap: var(--sp-1-5); }
  /* model button collapses to logo + chevron */
  .model-btn { padding: var(--sp-1) var(--sp-1-5); gap: var(--sp-1); }
  #model-btn-name { display: none; }
  /* discord is a link; the landing footer still carries it */
  .discord-btn { display: none; }

  /* dropdowns become bottom sheets: fixed, full-width, slide up */
  .model-panel, .theme-panel, .lang-panel {
    display: block; visibility: hidden; opacity: 0; pointer-events: none;
    position: fixed; left: 0; right: 0; top: auto; bottom: 0; width: 100%;
    max-height: min(70dvh, 520px); overflow-y: auto;
    border-radius: var(--r-lg) var(--r-lg) 0 0; border-bottom: none;
    box-shadow: 0 -10px 40px rgb(var(--shadow-rgb) / 0.45);
    animation: none;
    z-index: var(--z-modal);
    transform: translateY(105%);
    transition: transform var(--dur-slow) var(--ease), opacity var(--dur) var(--ease), visibility var(--dur-slow);
    padding-top: var(--sp-5);
  }
  .model-panel::before, .theme-panel::before, .lang-panel::before {
    content: ""; position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
    width: 40px; height: 4px; border-radius: var(--r-2xs); background: var(--border-strong);
  }
  .model-panel.open, .theme-panel.open, .lang-panel.open {
    visibility: visible; opacity: 1; pointer-events: auto; transform: none;
  }
  .side-foot .theme-panel, .side-foot .lang-panel {
    top: auto; bottom: 0; left: 0; right: 0; max-width: none;
  }
  /* virtual keyboards make Enter/Shift+Enter hints meaningless */
  .composer-hint { display: none; }
  .composer-zone { padding: var(--sp-2) var(--sp-2) var(--sp-3); }
}

@media (max-width: 480px) {
  .notif-btn { display: none; }
  .acct-chip { padding: 0 var(--sp-1); }
  .acct-chip .acct-av { width: 30px; height: 30px; }
  .toolbar { padding: 0 var(--sp-05); }
  .msg.user .body { max-width: 96%; }
  .toast { bottom: calc(var(--composer-h) + var(--sp-6) + var(--sp-1)); }
}

/* Desktop sidebar collapse: the chevron in the sidebar header folds the sidebar
   into a slim rail so the chat takes nearly the full width. Mobile keeps the
   overlay drawer instead. */
@media (min-width: 861px) {
  #side-collapse { display: grid; }
  #side-collapse svg { transition: transform var(--dur-slow) var(--ease); }
  body.sidebar-collapsed #sidebar { width: 44px; min-width: 44px; }
  body.sidebar-collapsed .logo,
  body.sidebar-collapsed .new-btn,
  body.sidebar-collapsed .search-box,
  body.sidebar-collapsed .side-btn,
  body.sidebar-collapsed .side-label,
  body.sidebar-collapsed .conv-list,
  body.sidebar-collapsed .ad-sidebar,
  body.sidebar-collapsed .side-foot { display: none; }
  body.sidebar-collapsed .side-head { justify-content: center; padding: var(--sp-4) 0; }
  body.sidebar-collapsed #side-collapse svg { transform: rotate(180deg); }
}

/* Touch targets: every control in this file sits between 20 and 34px, which is
   fine for a mouse and unusable with a thumb. Grow them only on coarse pointers
   so the desktop density is untouched. */
@media (pointer: coarse) {
  .icon-btn,
  .conv-actions .icon-btn,
  .f-actions .icon-btn,
  .msg .actions .icon-btn { min-width: 44px; min-height: 44px; }
  /* no hover on touch — keep message actions visible in flow, hugging the
     bubble content above just like the desktop hover pill does. */
  .msg .actions {
    position: static; margin-top: var(--sp-05);
    padding: 0; background: transparent; border: none; box-shadow: none;
    opacity: 1; visibility: visible; pointer-events: auto; transform: none;
  }
  .tool-btn, .theme-btn, .more-btn, .lang-btn, .donate-btn,
  .incog-btn, .share-top-btn, .send-btn, .stop-btn, .composer .mic-btn { width: 44px; height: 44px; }
  .discord-btn { width: 44px; height: 44px; }
  .notif-btn { width: 44px; height: 44px; }
  .acct-chip { height: 44px; padding: 0 var(--sp-4) 0 var(--sp-2); }
  .acct-chip .acct-av { width: 28px; height: 28px; }
  .att-rm { width: 32px; height: 32px; }
  .jump-btn { width: 44px; height: 44px; }
  .chip-dd .chip { height: 36px; }
  /* Touch has no hover, so the conversation row actions must stay reachable. */
  .conv-actions { opacity: 1; visibility: visible; transform: none; }
}

/* ============ pressed state ============
   One shared rule instead of eighteen near-identical :active blocks. Every
   hoverable row in the app confirms the press by dipping 1px. */
.conv-item:active, .m-opt:active, .theme-opt:active, .lang-opt:active,
.more-item:active, .chip-opt:active, .f-tile:active, .f-row:active,
.acct-tab:active, .fb-reason:active, .m-group-head:active, .src-toggle:active,
.att-rm:active, .tip-dismiss:active, .profile-chip-btn:active,
.logo-link:active {
  transform: translateY(1px);
}

/* tts accent */
.msg .actions .icon-btn.tts-btn,
.tts-btn.playing { color: var(--accent-strong); }

/* ============ skeletons ============ */
/* Replaces the bare "đang tải…" strings — a skeleton that matches the shape of
   what is coming reads as progress; a line of grey text reads as a stall. */
.skel {
  position: relative; overflow: hidden;
  background: var(--bg-elev-2); border-radius: var(--r-xs);
}
.skel::after {
  content: ""; position: absolute; inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, var(--bg-hover), transparent);
  animation: skelSweep 1.3s ease-in-out infinite;
}
@keyframes skelSweep { to { transform: translateX(100%); } }
.skel-line { height: 10px; margin-bottom: var(--sp-1-5); }
.skel-line.w-70 { width: 70%; }
.skel-line.w-45 { width: 45%; }
.skel-conv {
  display: flex; flex-direction: column; gap: var(--sp-1-5);
  padding: var(--sp-2-5) var(--sp-2-5); border-radius: var(--r-sm);
}
.skel-tile { aspect-ratio: 1; border-radius: var(--r-sm); }
.skel-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--sp-3);
}
@media (prefers-reduced-motion: reduce) {
  .skel::after { animation: none; opacity: 0.4; }
}

/* ============ classes referenced by app.js that had no rules ============ */
/* .stale — messages start dimmed and fade in after the transcript loads */
.msg.stale, .stale { opacity: 0.55; transition: opacity var(--dur) var(--ease); }
/* .f-sec — a section wrapper in the files modal */
.f-sec { display: flex; flex-direction: column; }
.f-sec + .f-sec { margin-top: var(--sp-2); }
/* .conv-empty — "no conversations" / "no results" in the sidebar */
.conv-empty {
  padding: var(--sp-6) var(--sp-4); text-align: center;
  color: var(--text-faint); font-size: var(--fs-sm);
}
/* .renaming — the row swaps its title for an input; the hover actions and the
   timestamp only get in the way while you are typing. */
.conv-item.renaming { background: var(--bg-elev-2); border-color: var(--accent-border); }
.conv-item.renaming .conv-actions { display: none; }
.conv-item.renaming .conv-meta { opacity: 0.45; }
/* .incog-hint — sits above the (empty) history list while incognito is on */
.incog-hint {
  padding: var(--sp-4) var(--sp-3);
  color: var(--accent-strong);
  background: var(--accent-faint);
  border: 1px dashed var(--accent-border);
  border-radius: var(--r-sm);
  margin: 0 var(--sp-1) var(--sp-2);
  font-size: var(--fs-xs);
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap; border: 0;
}

/* ============ syntax highlighting on the light theme ============ */
/* vendor/github-dark.min.css is a hardcoded dark palette, so every code block
   stayed near-black in `paper`. Remap the tokens rather than ship a second
   vendored theme. */
body[data-theme="paper"] .hljs { background: var(--code-bg); color: #24292f; }
body[data-theme="paper"] .hljs-doctag,
body[data-theme="paper"] .hljs-keyword,
body[data-theme="paper"] .hljs-meta .hljs-keyword,
body[data-theme="paper"] .hljs-template-tag,
body[data-theme="paper"] .hljs-template-variable,
body[data-theme="paper"] .hljs-type,
body[data-theme="paper"] .hljs-variable.language_ { color: #cf222e; }
body[data-theme="paper"] .hljs-title,
body[data-theme="paper"] .hljs-title.class_,
body[data-theme="paper"] .hljs-title.class_.inherited__,
body[data-theme="paper"] .hljs-title.function_ { color: #8250df; }
body[data-theme="paper"] .hljs-attr,
body[data-theme="paper"] .hljs-attribute,
body[data-theme="paper"] .hljs-literal,
body[data-theme="paper"] .hljs-meta,
body[data-theme="paper"] .hljs-number,
body[data-theme="paper"] .hljs-operator,
body[data-theme="paper"] .hljs-selector-attr,
body[data-theme="paper"] .hljs-selector-class,
body[data-theme="paper"] .hljs-selector-id,
body[data-theme="paper"] .hljs-variable { color: #0550ae; }
body[data-theme="paper"] .hljs-meta .hljs-string,
body[data-theme="paper"] .hljs-regexp,
body[data-theme="paper"] .hljs-string { color: #0a3069; }
body[data-theme="paper"] .hljs-built_in,
body[data-theme="paper"] .hljs-symbol { color: #953800; }
body[data-theme="paper"] .hljs-code,
body[data-theme="paper"] .hljs-comment,
body[data-theme="paper"] .hljs-formula { color: #6e7781; }
body[data-theme="paper"] .hljs-name,
body[data-theme="paper"] .hljs-quote,
body[data-theme="paper"] .hljs-selector-pseudo,
body[data-theme="paper"] .hljs-selector-tag { color: #116329; }
body[data-theme="paper"] .hljs-subst { color: #24292f; }
body[data-theme="paper"] .hljs-section { color: #0550ae; font-weight: var(--wt-bold); }
body[data-theme="paper"] .hljs-bullet { color: #953800; }
body[data-theme="paper"] .hljs-emphasis { color: #24292f; font-style: italic; }
body[data-theme="paper"] .hljs-strong { color: #24292f; font-weight: var(--wt-bold); }
body[data-theme="paper"] .hljs-addition { color: #116329; background-color: #dafbe1; }
body[data-theme="paper"] .hljs-deletion { color: #82071e; background-color: #ffebe9; }
body[data-theme="paper"] .body pre .code-head button { color: var(--text-dim); }

/* ============ profile (name + avatar) ============ */
.profile-chip { padding: var(--sp-05) var(--sp-05) 0; }
.profile-chip-btn {
  display: flex; align-items: center; gap: var(--sp-2); width: 100%;
  padding: var(--sp-1-5) var(--sp-2); border: none; border-radius: var(--r-sm);
  background: none; color: var(--text); cursor: pointer; text-align: left;
  transition: background var(--dur-fast);
}
.profile-chip-btn:hover { background: var(--bg-hover); }
.profile-chip-btn .p-chip-av {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  display: grid; place-items: center; overflow: hidden;
  background: var(--bg-elev-2); border: 1px solid var(--border-strong);
}
.profile-chip-btn .p-chip-av svg { width: 13px; height: 13px; }
.profile-chip-btn .p-chip-name {
  flex: 1; min-width: 0; font-size: var(--fs-xs); font-weight: var(--wt-semi);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.u-avatar { width: 100%; height: 100%; object-fit: cover; display: block; }
.u-avatar.preset {
  display: flex; align-items: center; justify-content: center;
  color: var(--on-solid); font-size: var(--fs-micro); font-weight: var(--wt-bold); line-height: 1;
}
.msg .meta .avatar.clickable { cursor: pointer; }
.msg .meta .avatar.clickable:hover { border-color: var(--accent); }
.msg .meta .avatar.user .u-avatar { width: 100%; height: 100%; }
.msg .meta .avatar.user .u-avatar.preset { font-size: var(--fs-micro); }
.profile-modal { width: min(460px, 100%); }
.p-row {
  display: flex; align-items: center; gap: var(--sp-2-5);
  padding: var(--sp-2-5) 0; font-size: var(--fs-sm); color: var(--text-dim);
}
.p-row input {
  flex: 1; background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--r-md);
  padding: var(--sp-2) var(--sp-2-5); font: var(--fs-xs) var(--font);
}
.p-row input:focus { border-color: var(--accent); }
.p-avatar-row { display: flex; align-items: center; gap: var(--sp-3-5); padding: var(--sp-2-5) 0; }
.p-avatar-row .p-preview {
  flex: none; width: 56px; height: 56px; border-radius: 50%;
  display: grid; place-items: center; overflow: hidden;
  background: var(--bg-elev-2); border: 1px solid var(--border-strong);
}
.p-avatar-row .p-preview img { width: 100%; height: 100%; object-fit: cover; }
.p-avatar-row .p-preview .p-pv {
  width: 100%; height: 100%; display: flex; align-items: center;
  justify-content: center; color: var(--on-solid); font-size: var(--fs-h2); font-weight: var(--wt-bold);
}
.p-avatar-row .p-preview .p-pv.p-pv-default { background: none; color: var(--accent-strong); }
.p-avatar-row .p-preview .p-pv.p-pv-default svg { width: 26px; height: 26px; }
.p-avatar-actions { display: flex; flex-direction: column; gap: var(--sp-2); align-items: flex-start; }
.p-avatar-actions .ghost {
  padding: var(--sp-1-5) var(--sp-3); border-radius: var(--r-sm); font: var(--wt-semi) var(--fs-xs) var(--font); cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--bg-elev-2); color: var(--text);
  transition: background var(--dur-fast);
}
.p-avatar-actions .ghost:hover { background: var(--bg-hover); border-color: var(--accent-border); }
.p-avatar-actions .ghost-danger {
  padding: var(--sp-1-5) var(--sp-3); border-radius: var(--r-sm); font: var(--wt-semi) var(--fs-xs) var(--font); cursor: pointer;
  border: none; background: none; color: var(--err); transition: background var(--dur-fast);
}
.p-avatar-actions .ghost-danger:hover { background: var(--err-soft); }
.p-presets { display: flex; flex-wrap: wrap; gap: var(--sp-2); padding: var(--sp-1-5) 0 var(--sp-05); }
.p-preset {
  flex: none; width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center; cursor: pointer;
  border: 2px solid transparent; padding: 0; transition: transform var(--dur-fast);
}
.p-preset:hover { transform: scale(1.1); }
.p-preset.selected { border-color: var(--text); box-shadow: 0 0 0 2px var(--bg-elev); }
.p-preset .p-pp {
  width: 22px; height: 22px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgb(255 255 255 / 0.22); color: var(--on-solid);
  font-size: var(--fs-micro); font-weight: var(--wt-bold); line-height: 1;
}

.p-row-check {
  justify-content: space-between;
  cursor: pointer; user-select: none;
  border-top: 1px solid var(--border);
  margin-top: var(--sp-1);
}
.p-share-txt { display: flex; flex-direction: column; gap: var(--sp-05); min-width: 0; }
.p-share-txt b { color: var(--text); font-size: var(--fs-sm); font-weight: var(--wt-semi); }
.p-share-txt small { color: var(--text-faint); font-size: var(--fs-micro); }
.p-row-check input[type="checkbox"] {
  flex: none; width: 18px; height: 18px; margin: 0; cursor: pointer;
  accent-color: var(--accent);
}

/* ============ share modal ============ */
.share-modal { width: min(520px, 100%); }
.s-row { display: flex; flex-direction: column; gap: var(--sp-1-5); padding: var(--sp-2) 0 var(--sp-05); }
.s-radio {
  display: flex; align-items: center; gap: var(--sp-2-5); padding: var(--sp-2) var(--sp-2-5);
  border: 1px solid var(--border); border-radius: var(--r-md); cursor: pointer;
  font-size: var(--fs-sm); color: var(--text); background: var(--bg-elev);
  transition: border-color var(--dur-fast), background var(--dur-fast);
}
.s-radio:hover { border-color: var(--border-strong); background: var(--bg-hover); }
.s-radio:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.s-radio input { accent-color: var(--accent); margin: 0; }
.s-range { display: none; grid-template-columns: 1fr 1fr; gap: var(--sp-3); }
.s-range.on { display: grid; }
.s-result { border-top: 1px solid var(--border); margin-top: var(--sp-1-5); }
.share-line { display: flex; align-items: center; gap: var(--sp-2); min-width: 0; }
.share-line input {
  flex: 1; min-width: 0; font-size: var(--fs-xs); font-family: var(--mono);
  background: var(--bg-hover); color: var(--text); border: 1px solid var(--border);
  border-radius: var(--r-md); padding: var(--sp-2) var(--sp-2-5);
}
.share-line .primary {
  flex: none; font: var(--wt-semi) var(--fs-xs) var(--font); cursor: pointer;
  padding: var(--sp-2) var(--sp-4); border-radius: var(--r-pill);
  border: 1px solid transparent; background: var(--accent); color: var(--on-accent);
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.share-line .primary:hover { background: var(--accent-strong); }
.share-line .primary:active { transform: translateY(1px); }
.s-list { display: flex; flex-direction: column; gap: var(--sp-2); margin-top: var(--sp-3); }
.s-empty { font-size: var(--fs-xs); color: var(--text-faint); padding: var(--sp-2-5) 0; }
.s-link-row {
  display: flex; align-items: center; gap: var(--sp-2-5); padding: var(--sp-2-5) var(--sp-2-5);
  border: 1px solid var(--border); border-radius: var(--r-md); background: var(--bg-elev);
}
.s-link-info { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: var(--sp-05); }
.s-link-url {
  font-size: var(--fs-micro); font-family: var(--mono); color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.s-link-info small { font-size: var(--fs-label); color: var(--text-faint); }
.s-link-row .ghost-danger {
  flex: none; font: var(--wt-semi) var(--fs-micro) var(--font); cursor: pointer;
  padding: var(--sp-1-5) var(--sp-3); border-radius: var(--r-pill);
  border: 1px solid var(--border-strong); background: var(--bg-elev-2); color: var(--err);
  transition: background var(--dur-fast), border-color var(--dur-fast);
}
.s-link-row .ghost-danger:hover { background: var(--err-soft); border-color: var(--err); }
.s-link-row .ghost-danger:active { transform: translateY(1px); }
.share-modal select {
  flex: 1; min-width: 0; cursor: pointer;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--r-md);
  padding: var(--sp-2) var(--sp-2-5) var(--sp-2) var(--sp-3); font: var(--fs-xs) var(--font);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 5' width='8' height='5'%3E%3Cpath d='M1 1l3 3 3-3' fill='none' stroke='%238b93a1' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
  padding-right: var(--sp-8);
  transition: border-color var(--dur) var(--ease);
}
.share-modal select:focus { border-color: var(--accent); }

/* ============ safe areas (viewport-fit=cover) ============
   The app is an installed PWA with a translucent status bar, so on notch /
   home-indicator devices fixed chrome must never assume the viewport starts
   at 0. env() resolves to 0px everywhere else, so max() keeps the exact
   current spacing on desktop and non-cover contexts. Appended last so these
   win the cascade over the media-block shorthand paddings above. */
.topbar { padding-top: max(var(--sp-3), env(safe-area-inset-top)); }
.side-head { padding-top: max(var(--sp-4), env(safe-area-inset-top)); }
.side-foot { padding-bottom: max(var(--sp-2-5), env(safe-area-inset-bottom)); }
.composer-zone { padding-bottom: max(var(--sp-4), env(safe-area-inset-bottom)); }
.jump-btn {
  right: max(var(--sp-6), env(safe-area-inset-right));
  bottom: calc(var(--composer-h) + max(var(--sp-4), env(safe-area-inset-bottom)));
}
.lb-close { top: max(18px, env(safe-area-inset-top)); right: max(18px, env(safe-area-inset-right)); }
.lb-prev { left: max(18px, env(safe-area-inset-left)); }
.lb-next { right: max(18px, env(safe-area-inset-right)); }
.lb-count { bottom: max(16px, env(safe-area-inset-bottom)); }

/* Bottom sheets need their own foot inset; the handle stays at the visual top. */
@media (max-width: 640px) {
  .model-panel, .theme-panel, .lang-panel {
    padding-bottom: max(var(--sp-5), calc(env(safe-area-inset-bottom) + var(--sp-3)));
  }
}

/* ============ iOS focus zoom guard ============
   Safari force-zooms any focused field below 16px. Every input in the app
   inherits the 15px --fs-body, so each composer focus jumped the viewport.
   16px only where the zoom can happen (coarse pointers / phone widths). */
@media (pointer: coarse), (max-width: 640px) {
  :is(#input, .search-box input, .rename-input, .p-row input,
      .modal textarea, .fb-modal .fb-text, .compose-modal .compose-text,
      .share-line input, .donate-addr, .v-row select, .share-modal select) {
    font-size: 16px;
  }
}

/* ============ topbar elevation on scroll ============
   Flat hairline at rest; once the transcript scrolls under the bar it gets a
   tinted shadow so content passing beneath reads as depth, not overlap. */
.topbar { transition: background var(--dur) ease, box-shadow var(--dur-slow) var(--ease); }
.topbar.scrolled { box-shadow: 0 6px 18px rgb(var(--shadow-rgb) / 0.13); }

/* ============ collapsed rail keeps its verbs ============
   The 44px desktop rail used to hide everything except the fold chevron —
   a dead column. New-chat and My-files survive as icon-only buttons. */
@media (min-width: 861px) {
  body.sidebar-collapsed .new-btn,
  body.sidebar-collapsed .side-btn {
    display: flex;
    justify-content: center;
    width: 32px; min-width: 32px;
    margin-left: auto; margin-right: auto;
    padding: var(--sp-2) 0;
    overflow: hidden;
  }
  body.sidebar-collapsed .new-btn span,
  body.sidebar-collapsed .side-btn span { display: none; }
}

/* ============ composer spotlight border (hover-capable devices) ============
   Cursor-tracked glow riding the shell's border ring. JS feeds --mx/--my;
   defaults park the hotspot off-canvas so nothing shows before first move. */
@media (hover: hover) and (pointer: fine) {
  .composer-shell { position: relative; }
  .composer-shell::after {
    content: ""; position: absolute; inset: -1px;
    border-radius: inherit; padding: 1px; pointer-events: none;
    background: radial-gradient(170px circle at var(--mx, -300px) var(--my, -300px),
      rgb(var(--accent-rgb) / 0.4), transparent 72%);
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
            mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
            mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--dur-slow) var(--ease);
  }
  .composer-shell:hover::after,
  .composer-shell:focus-within::after { opacity: 1; }
}
/* ---- thinking effort selector (composer row) ---- */
.composer .composer-think { flex: none; }
.composer .composer-think .chip { height: 32px; padding: 0 var(--sp-2); font-size: var(--fs-xs); border-radius: var(--r-sm); border-color: var(--border-strong); background: var(--bg-elev-2); }
.composer-think.has-effort .chip { color: var(--accent-strong); border-color: var(--accent-border-strong); background: var(--accent-faint); }
.composer-think.has-effort .chip b { color: var(--accent-strong); }
.think-menu { left: auto; right: -6px; bottom: calc(100% + 8px); min-width: 150px; }

/* ---- mobile composer polish ----
   Small screens: drop decorative weight from the toolbar row and let the
   effort pill read as a compact value chip. Lives at end-of-file so it wins
   the cascade against the base rules above without specificity games. */
@media (max-width: 640px) {
  .toolbar { gap: var(--sp-2); }
  .tool-btn { border-color: var(--border); background: transparent; }
  .composer .composer-think .chip { height: 30px; padding: 0 var(--sp-2); }
  .composer-think.has-effort .chip {
    color: var(--accent-strong);
    border-color: var(--accent-border);
    background: transparent;
  }
  /* effort is on: the accent value alone carries the meaning */
  .composer-think.has-effort .chip-prefix { display: none; }
}