:root {
  --bg: #060606;
  --surface: #131313;
  --surface-2: #1b1b1b;
  --sidebar-bg: #0a0a0a;
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);
  --text: #f5f5f5;
  --text-dim: #a5a5a5;
  --text-faint: #6c6c6c;
  --gold: #e8e8e8;
  --gold-soft: #ffffff;
  --gold-deep: #4c4c4c;
  --gold-glow: rgba(255, 255, 255, 0.10);
  --brand-green: #7ed321;
  --brand-green-soft: #a7ea63;
  --metallic: linear-gradient(150deg, #ffffff 0%, #dedede 30%, #8c8c8c 65%, #f2f2f2 100%);
  --bubble-user: linear-gradient(160deg, #1c1c1c, #121212);
  --danger: #e0645a;
  --danger-soft: rgba(224, 101, 90, 0.14);
  --success: #4dd1a1;
  --radius-lg: 22px;
  --radius-md: 15px;
  --radius-sm: 10px;
  --topbar-h: 56px;
  --sidebar-w: 268px;
  --sidebar-gap: 16px;
  --shadow-premium: 0 24px 60px rgba(0, 0, 0, .55), inset 0 1px 0 rgba(255, 255, 255, .04);
  --font-ui: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-pixel: 'Press Start 2P', 'Plus Jakarta Sans', monospace;
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-mono: "SF Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.sidebar-lock { overflow: hidden; }
button { font-family: inherit; }
a { color: var(--gold-soft); }

::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #2a2823; border-radius: 8px; border: 2px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: var(--gold-deep); background-clip: padding-box; }

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 55% 35% at 18% -8%, rgba(255, 255, 255, 0.06), transparent 60%),
    radial-gradient(ellipse 40% 28% at 100% 6%, rgba(126, 211, 33, 0.05), transparent 60%);
}
.bg-glow::after {
  content: '';
  position: absolute;
  inset: 0;
  opacity: .35;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/></svg>");
}

.app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

/* ---------- Topbar (mobile only) — floating glass bar ---------- */
.topbar {
  display: none;
  align-items: center;
  gap: 8px;
  height: var(--topbar-h);
  padding: 0 10px;
  background: rgba(21, 20, 18, 0.82);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  position: fixed;
  top: 10px;
  left: 10px;
  right: 10px;
  z-index: 35;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .35);
}
.topbar-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  flex: 1;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: -.1px;
}
.topbar .icon-btn { color: var(--text-dim); }

.topbar-title.is-brand .pixel-logo { font-size: 15px; justify-content: center; }
.topbar-title.is-brand { overflow: visible; }

.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(5, 5, 4, 0.6);
  backdrop-filter: blur(2px);
  z-index: 25;
  opacity: 0;
  transition: opacity .25s var(--ease);
}
.sidebar-backdrop.visible { display: block; opacity: 1; }

/* ---------- Sidebar — floating glass panel, inset from edges ---------- */
.sidebar {
  position: fixed;
  top: var(--sidebar-gap);
  left: var(--sidebar-gap);
  bottom: var(--sidebar-gap);
  width: var(--sidebar-w);
  z-index: 30;
  background: linear-gradient(180deg, var(--sidebar-bg), #0a0910);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-premium);
  display: flex;
  flex-direction: column;
  padding: 14px 12px;
  min-width: 0;
}

.sidebar-top {
  padding: 2px 4px 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 0 2px;
}
.pixel-logo {
  font-family: var(--font-pixel);
  font-size: 13px;
  line-height: 1;
  display: inline-flex;
  white-space: nowrap;
}
.pixel-logo .pl-w,
.pixel-logo .pl-g {
  text-shadow:
    1.5px 0 0 #000, -1.5px 0 0 #000, 0 1.5px 0 #000, 0 -1.5px 0 #000,
    1.5px 1.5px 0 #000, -1.5px -1.5px 0 #000, 1.5px -1.5px 0 #000, -1.5px 1.5px 0 #000,
    3px 3px 0 rgba(0, 0, 0, .5);
}
.pixel-logo .pl-w { color: #ffffff; }
.pixel-logo .pl-g { color: var(--brand-green); }

.new-chat-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .15s var(--ease), box-shadow .2s var(--ease);
}
.new-chat-btn svg { flex-shrink: 0; color: var(--gold-soft); }
.new-chat-btn:hover {
  border-color: var(--gold-deep);
  background: var(--surface-2);
  box-shadow: 0 0 0 3px var(--gold-glow);
  transform: translateY(-1px);
}
.new-chat-btn:active { transform: scale(.97); }

.sidebar-list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 6px 2px;
  min-height: 0;
}

.sidebar-label {
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: .5px;
  color: var(--text-faint);
  text-transform: uppercase;
  padding: 16px 10px 7px;
}
.sidebar-label:first-child { padding-top: 4px; }

.history-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 8px 9px 11px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--text-dim);
  cursor: pointer;
  border: 1px solid transparent;
  min-width: 0;
  transition: background .15s var(--ease), color .15s var(--ease);
}
.history-item:hover { background: rgba(255, 255, 255, .05); color: var(--text); }
.history-item.active {
  background: rgba(255, 255, 255, .055);
  color: var(--text);
}
.history-item.active::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 14px;
  border-radius: 3px;
  background: var(--gold-soft);
}

.history-title {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  mask-image: linear-gradient(90deg, #000 85%, transparent 100%);
}

.history-menu-btn {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--text-faint);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .15s ease, background .15s ease, color .15s ease, transform .12s var(--ease);
}
.history-item:hover .history-menu-btn,
.history-item.active .history-menu-btn {
  opacity: 1;
}
.history-menu-btn:hover { background: rgba(255, 255, 255, .09); color: var(--text); }
.history-menu-btn:active { transform: scale(.88); }

.history-dropdown {
  position: fixed;
  z-index: 60;
  background: #211e28;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .55);
  padding: 6px;
  min-width: 180px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  transform-origin: top right;
  animation: dropdownIn .22s var(--ease);
}
@keyframes dropdownIn {
  from { opacity: 0; transform: scale(.9) translateY(-6px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}
.dropdown-opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 11px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  text-align: left;
  transition: background .15s ease;
}
.dropdown-opt:hover { background: rgba(255, 255, 255, .07); }
.dropdown-opt:active { transform: scale(.97); }
.dropdown-opt.danger { color: #f0827a; }
.dropdown-opt.danger:hover { background: var(--danger-soft); }

.history-confirm {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--text);
  min-width: 0;
}
.history-confirm span {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.confirm-btn {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 7px;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .12s ease, transform .1s ease;
}
.confirm-btn:active { transform: scale(.85); }
.confirm-yes { background: var(--danger-soft); color: #f0827a; }
.confirm-yes:hover { background: rgba(224, 101, 90, .25); }
.confirm-no { background: rgba(255, 255, 255, .07); color: var(--text-dim); }
.confirm-no:hover { background: rgba(255, 255, 255, .12); color: var(--text); }

.history-rename-input {
  flex: 1;
  min-width: 0;
  background: #0c0b0a;
  border: 1px solid var(--gold-deep);
  border-radius: 7px;
  padding: 4px 8px;
  font-size: 13.5px;
  color: var(--text);
  outline: none;
  font-family: inherit;
}

.sidebar-bottom {
  padding: 12px 8px 2px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.brand-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-faint);
  letter-spacing: .2px;
}
.brand-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--brand-green);
  box-shadow: 0 0 8px rgba(126, 211, 33, .6);
  flex-shrink: 0;
}

.admin-link-btn {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-faint);
  text-decoration: none;
  transition: background .15s ease, color .15s ease;
}
.admin-link-btn:hover { background: rgba(255, 255, 255, .07); color: var(--gold-soft); }

.hamburger-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-dim);
  border-radius: 10px;
  padding: 11px;
  cursor: pointer;
  flex-shrink: 0;
  transition: background .18s ease, transform .15s var(--ease);
}
.hamburger-btn:hover { background: rgba(255, 255, 255, .07); color: var(--text); }
.hamburger-btn:active { transform: scale(.9); }

.hamburger {
  display: block;
  position: relative;
  width: 17px;
  height: 13px;
}
.hamburger i {
  position: absolute;
  left: 0;
  width: 17px;
  height: 1.6px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .28s var(--ease), opacity .2s ease, top .28s var(--ease);
}
.hamburger i:nth-child(1) { top: 0; }
.hamburger i:nth-child(2) { top: 5.5px; }
.hamburger i:nth-child(3) { top: 11px; }
.hamburger-btn.is-open .hamburger i:nth-child(1) { top: 5.5px; transform: rotate(45deg); }
.hamburger-btn.is-open .hamburger i:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger-btn.is-open .hamburger i:nth-child(3) { top: 5.5px; transform: rotate(-45deg); }

/* ---------- Main ---------- */
.main {
  margin-left: calc(var(--sidebar-w) + var(--sidebar-gap) * 2);
  min-width: 0;
}

.chat-scroll {
  padding-bottom: calc(var(--composer-h, 110px) + 20px);
}

.empty-state {
  min-height: 72vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  color: var(--text-dim);
  animation: rise .4s var(--ease);
}
.empty-mark {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: var(--metallic);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  box-shadow: 0 12px 28px rgba(255, 255, 255, .16), inset 0 1px 0 rgba(255, 255, 255, .4);
}
.empty-state h1 {
  font-size: 32px;
  color: var(--text);
  margin: 0 0 8px;
  font-weight: 700;
  letter-spacing: -.7px;
}
.empty-state h1 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--brand-green-soft);
}
.empty-sub {
  font-size: 14.5px;
  color: var(--text-faint);
  margin: 0 0 34px;
}
.empty-state.hidden { display: none; }

.suggestion-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 230px));
  gap: 9px;
  width: 100%;
  max-width: 480px;
}
.suggestion-chip {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 11px 16px 11px 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 9px;
  position: relative;
  overflow: hidden;
  transition: transform .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}
.suggestion-chip::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(140px 70px at var(--mx, 0) var(--my, 0), var(--gold-glow), transparent 70%);
  opacity: 0;
  transition: opacity .25s ease;
  pointer-events: none;
}
.suggestion-chip:hover::before { opacity: 1; }
.suggestion-chip:hover {
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, .3);
  background: var(--surface-2);
}
.suggestion-chip:active { transform: translateY(0) scale(.98); }
.chip-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .12);
  color: var(--gold-soft);
  display: flex;
  align-items: center;
  justify-content: center;
}
.chip-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.suggestion-chip:hover .chip-label { color: var(--text); }

@media (max-width: 560px) {
  .suggestion-grid { grid-template-columns: 1fr; max-width: 320px; }
}

.messages {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 24px 40px;
  display: flex;
  flex-direction: column;
  gap: 26px;
  min-width: 0;
}

/* ---------- Message rows ---------- */
.msg {
  display: flex;
  animation: rise .35s var(--ease);
  min-width: 0;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.msg.ai { justify-content: flex-start; gap: 12px; align-items: flex-start; }
.msg.user { justify-content: flex-end; }

.msg-avatar {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  background: var(--metallic);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
  box-shadow: 0 6px 16px rgba(255, 255, 255, .16), inset 0 1px 0 rgba(255, 255, 255, .35);
}

.msg-body {
  min-width: 0;
  max-width: 100%;
}
.msg.ai .msg-body { flex: 1; padding-top: 2px; position: relative; }

.msg-actions {
  display: flex;
  gap: 4px;
  margin-top: 8px;
  opacity: 0;
  transform: translateY(-2px);
  transition: opacity .15s ease, transform .15s ease;
}
.msg.ai:hover .msg-actions,
.msg-actions.always { opacity: 1; transform: translateY(0); }
.msg-action-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  border: none;
  background: transparent;
  color: var(--text-faint);
  font-size: 11.5px;
  padding: 5px 8px;
  border-radius: 7px;
  cursor: pointer;
  transition: background .12s ease, color .12s ease;
}
.msg-action-btn:hover { background: rgba(255, 255, 255, .06); color: var(--gold-soft); }
.msg-action-btn.copied { color: var(--success); }

.nexa-toast {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%) translateY(-12px);
  background: rgba(23, 21, 28, .96);
  border: 1px solid var(--border-strong);
  color: var(--text);
  padding: 10px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  box-shadow: 0 14px 34px rgba(0, 0, 0, .45);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s var(--ease), transform .25s var(--ease);
}
.nexa-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.msg.user .msg-body {
  background: var(--bubble-user);
  border: 1px solid var(--border);
  border-radius: 20px 20px 5px 20px;
  padding: 11px 17px;
  max-width: min(75%, 600px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .25);
}

@media (max-width: 640px) {
  .msg.user .msg-body { max-width: 88%; }
}

.msg-text {
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--text);
  word-wrap: break-word;
  overflow-wrap: anywhere;
  min-width: 0;
}
.msg-text > *:first-child { margin-top: 0; }
.msg-text > *:last-child { margin-bottom: 0; }
.msg-text p { margin: 0 0 10px; }
.msg-text ul, .msg-text ol { margin: 0 0 10px; padding-left: 22px; }
.msg-text li { margin: 3px 0; }
.msg-text h1, .msg-text h2, .msg-text h3 {
  margin: 16px 0 8px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.2px;
}
.msg-text h1 { font-size: 19px; }
.msg-text h2 { font-size: 17px; }
.msg-text h3 { font-size: 15.5px; }
.msg-text strong { font-weight: 700; color: #fff; }
.msg-text blockquote {
  margin: 8px 0;
  padding: 2px 14px;
  border-left: 3px solid var(--gold-deep);
  color: var(--text-dim);
}
.msg-text hr { border: none; border-top: 1px solid var(--border); margin: 14px 0; }
.msg-text table {
  border-collapse: collapse;
  margin: 10px 0;
  font-size: 13.5px;
  display: block;
  overflow-x: auto;
  max-width: 100%;
}
.msg-text th, .msg-text td {
  border: 1px solid var(--border);
  padding: 6px 10px;
  text-align: left;
}
.msg-text a { text-decoration: underline; text-underline-offset: 2px; word-break: break-word; }

.msg-text code {
  background: rgba(255, 255, 255, .06);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 5px;
  font-size: 13px;
  font-family: var(--font-mono);
  overflow-wrap: anywhere;
}

.code-block {
  position: relative;
  margin: 12px 0;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #0d0c11;
  max-width: 100%;
  box-shadow: 0 10px 26px rgba(0, 0, 0, .3);
}
.code-block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  background: linear-gradient(180deg, rgba(255, 255, 255, .035), rgba(255, 255, 255, .01));
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-faint);
  font-family: var(--font-mono);
}
.code-dots { display: flex; gap: 5px; padding-left: 3px; flex-shrink: 0; }
.code-dots span { width: 8px; height: 8px; border-radius: 50%; display: block; }
.code-dots span:nth-child(1) { background: #e0645a; }
.code-dots span:nth-child(2) { background: #e0b04a; }
.code-dots span:nth-child(3) { background: #4dd18a; }

.code-tabs {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  min-width: 0;
}
.code-tab {
  border: none;
  background: transparent;
  color: var(--text-faint);
  font-size: 11.5px;
  font-family: var(--font-ui);
  font-weight: 600;
  letter-spacing: .2px;
  padding: 5px 10px;
  border-radius: 7px;
  cursor: default;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: background .12s ease, color .12s ease;
}
.code-block.has-preview .code-tab { cursor: pointer; }
.code-tab:hover { color: var(--text-dim); }
.code-tab.active { background: rgba(255, 255, 255, .12); color: var(--gold-soft); }

.code-copy-btn {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 11.5px;
  cursor: pointer;
  padding: 5px 9px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
  transition: background .12s ease, color .12s ease;
}
.code-copy-btn:hover { background: rgba(255, 255, 255, .12); color: var(--gold-soft); }
.code-copy-btn.copied { color: var(--success); }

.msg-text pre {
  margin: 0;
  padding: 14px;
  overflow-x: auto;
  max-width: 100%;
}
.msg-text pre.hidden { display: none; }
.msg-text pre code {
  background: none;
  border: none;
  padding: 0;
  overflow-wrap: normal;
  white-space: pre;
}

/* ---------- HTML live preview panel ---------- */
.code-preview {
  border-top: 1px solid var(--border);
}
.code-preview.hidden { display: none; }
.code-preview iframe {
  display: block;
  width: 100%;
  height: 320px;
  border: none;
  background: #fff;
}
.code-preview-foot {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 6px;
  padding: 7px 10px;
  background: rgba(255, 255, 255, .02);
  border-top: 1px solid var(--border);
}
.preview-action-btn {
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-size: 11.5px;
  cursor: pointer;
  padding: 5px 9px;
  border-radius: 7px;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: background .12s ease, color .12s ease;
}
.preview-action-btn:hover { background: rgba(255, 255, 255, .12); color: var(--gold-soft); }
.preview-action-btn.copied { color: var(--success); }

.msg-image {
  max-width: 260px;
  width: 100%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  margin-bottom: 8px;
  display: block;
}

.typing {
  display: inline-flex;
  gap: 4px;
  padding: 4px 0;
}
.typing span {
  width: 6px; height: 6px;
  background: var(--gold-soft);
  border-radius: 50%;
  animation: blink 1.2s infinite ease-in-out;
}
.typing span:nth-child(2) { animation-delay: .15s; }
.typing span:nth-child(3) { animation-delay: .3s; }
@keyframes blink {
  0%, 80%, 100% { opacity: .2; }
  40% { opacity: 1; }
}

.status-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 2px;
}
.status-tag {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-faint);
  letter-spacing: .2px;
}
.status-label {
  color: var(--brand-green-soft);
  animation: statusFade .5s ease;
}
@keyframes statusFade {
  from { opacity: 0; transform: translateY(2px); }
  to { opacity: 1; transform: translateY(0); }
}
.status-dots {
  display: inline-flex;
  gap: 4px;
}
.status-dots span {
  width: 5px; height: 5px;
  background: var(--brand-green);
  border-radius: 50%;
  animation: blink 1.2s infinite ease-in-out;
}
.status-dots span:nth-child(2) { animation-delay: .15s; }
.status-dots span:nth-child(3) { animation-delay: .3s; }

/* ---------- Composer — floating glass pill ---------- */
.composer-wrap {
  position: fixed;
  bottom: 14px;
  left: calc(var(--sidebar-w) + var(--sidebar-gap) * 2);
  right: 16px;
  z-index: 20;
  padding: 0 16px;
}

.composer {
  max-width: 760px;
  margin: 0 auto;
  background: rgba(23, 21, 28, 0.9);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 9px 9px 9px 7px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, .4), inset 0 1px 0 rgba(255, 255, 255, .04);
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}
.composer:focus-within {
  border-color: rgba(255, 255, 255, .4);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .45), 0 0 0 4px var(--gold-glow);
}

.composer-row {
  display: flex;
  align-items: flex-end;
  gap: 6px;
}

.icon-btn {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s var(--ease), color .2s var(--ease), transform .15s var(--ease);
}
.icon-btn svg { width: 22px; height: 22px; }
.icon-btn:hover { background: rgba(255, 255, 255, .08); color: var(--text); transform: scale(1.04); }
.icon-btn:active { transform: scale(.92); }

textarea#promptInput {
  flex: 1;
  resize: none;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text);
  font-size: 15px;
  line-height: 1.4;
  max-height: 160px;
  min-height: 22px;
  padding: 8px 4px;
  font-family: inherit;
  overflow-y: auto;
}
textarea#promptInput::placeholder { color: var(--text-faint); }

.send-btn {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  border-radius: 50%;
  border: none;
  background: var(--metallic);
  color: #0a0a09;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 18px rgba(255, 255, 255, .22);
  transition: opacity .18s ease, transform .18s var(--ease), box-shadow .18s ease;
}
.send-btn svg { width: 19px; height: 19px; }
.send-btn:hover:not(:disabled) { transform: scale(1.08); box-shadow: 0 8px 22px rgba(255, 255, 255, .32); }
.send-btn:active:not(:disabled) { transform: scale(.92); }
.send-btn:disabled { opacity: .3; cursor: default; transform: none; box-shadow: none; background: var(--surface-2); color: var(--text-faint); }

.disclaimer {
  text-align: center;
  font-size: 11px;
  color: var(--text-faint);
  margin: 10px 0 0;
}

.image-preview {
  position: relative;
  width: fit-content;
  margin: 6px 6px 2px;
}
.image-preview img {
  height: 64px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  display: block;
}
.image-preview button {
  position: absolute;
  top: -6px; right: -6px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  color: var(--text);
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.image-preview.hidden { display: none; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .topbar { display: flex; }
  .main { margin-left: 0; padding-top: calc(var(--topbar-h) + 20px); }
  .sidebar {
    top: calc(var(--topbar-h) + 18px);
    left: 10px;
    bottom: 10px;
    width: 272px;
    max-width: 80vw;
    transform: translateX(calc(-100% - 20px));
    transition: transform .3s var(--ease);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-backdrop { top: 0; }
  .hamburger-btn { display: flex; }
  .messages { padding: 14px 16px 32px; }
  .empty-state { padding-top: 10px; min-height: 64vh; }
  .composer-wrap { left: 0; right: 0; padding: 0 10px; bottom: 10px; }
}

@media (max-width: 420px) {
  .empty-state h1 { font-size: 25px; }
  .messages { gap: 22px; }
}