:root {
  --bg: #f7f7f8;
  --bg-elev: #ffffff;
  --bg-side: #f0f0f2;
  --fg: #1a1a1a;
  --fg-dim: #6b7280;
  --border: #e5e7eb;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --user-bubble: #2563eb;
  --user-fg: #ffffff;
  --bot-bubble: #ffffff;
  --shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 4px 16px rgba(0, 0, 0, .04);
  --transition: 180ms cubic-bezier(.4, 0, .2, 1);
  --app-h: 100dvh;
}

[data-theme="dark"] {
  --bg: #0f0f10;
  --bg-elev: #1a1a1c;
  --bg-side: #151517;
  --fg: #ececec;
  --fg-dim: #8a8a90;
  --border: #2a2a2e;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --bot-bubble: #1e1e22;
  --shadow: 0 1px 3px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
html { height: var(--app-h); }

body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.55;
  background: var(--bg);
  color: var(--fg);
  display: grid;
  grid-template-columns: 260px 1fr;
  grid-template-rows: 1fr;
  height: var(--app-h);
  overflow: hidden;
  transition: background var(--transition), color var(--transition);
}

/* ---------- onboarding ---------- */
body.onboarding { grid-template-columns: 1fr; }
body.onboarding #drawer,
body.onboarding #topbar { display: none !important; }
body.onboarding main { grid-column: 1; }

/* ---------- sidebar ---------- */
#drawer {
  grid-column: 1;
  grid-row: 1;
  background: var(--bg-side);
  border-right: 1px solid var(--border);
  padding: 1rem .75rem;
  display: flex;
  flex-direction: column;
  gap: .25rem;
  overflow-y: auto;
}
#drawer .brand {
  font-weight: 700;
  font-size: 1.1rem;
  padding: .5rem .75rem;
  margin-bottom: .75rem;
}
#drawer a {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .65rem .75rem;
  color: var(--fg);
  text-decoration: none;
  border-radius: 10px;
  font-weight: 500;
  transition: background var(--transition), transform var(--transition);
}
#drawer a:hover { background: rgba(127, 127, 127, .12); }
#drawer a:active { transform: scale(.98); }
#drawer a.active { background: rgba(127, 127, 127, .18); }
#drawer a[hidden] { display: none !important; }
#drawer .spacer { flex: 1; }
#theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  border-radius: 10px;
  padding: .55rem .75rem;
  cursor: pointer;
  font: inherit;
  font-size: .9rem;
  transition: background var(--transition);
}
#theme-toggle:hover { background: rgba(127, 127, 127, .12); }

/* ---------- main ---------- */
main {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  min-width: 0;
}
#app {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ---------- backdrop ---------- */
#backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .4);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s;
  z-index: 99;
}
#backdrop.show { opacity: 1; pointer-events: auto; }

/* ---------- topbar (mobile) ---------- */
#topbar {
  display: none;
  align-items: center;
  gap: .5rem;
  padding: .65rem 1rem;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  padding-top: max(.65rem, env(safe-area-inset-top));
}
#topbar #menu-btn {
  background: transparent;
  border: 0;
  color: var(--fg);
  font-size: 1.4rem;
  cursor: pointer;
  padding: .35rem .55rem;
  border-radius: 8px;
}
#topbar #menu-btn:hover { background: rgba(127, 127, 127, .12); }
#topbar .title { flex: 1; font-weight: 600; }
#topbar #user-badge { font-size: .85rem; color: var(--fg-dim); }

#topbar #user-badge.admin {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #fff;
  padding: .2rem .6rem;
  border-radius: 999px;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .05em;
}

/* ---------- chat ---------- */
.chat {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  overflow: hidden;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  min-height: 0;
}
.chat-main {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  position: relative;
}
.messages {
  flex: 1;
  overflow-y: auto;
  padding: 3.2rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  scroll-behavior: smooth;
  overscroll-behavior: contain;
  min-height: 0;
}

/* кнопка «Очистить» — заметная, но полупрозрачная */
.chat-clear {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .4rem .8rem;
  background: color-mix(in srgb, var(--bg-elev) 78%, transparent);
  backdrop-filter: blur(10px) saturate(140%);
  -webkit-backdrop-filter: blur(10px) saturate(140%);
  border: 1px solid color-mix(in srgb, var(--border) 80%, transparent);
  border-radius: 999px;
  color: var(--fg);
  font: inherit;
  font-size: .8rem;
  font-weight: 500;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 4px 12px rgba(0, 0, 0, .06);
  opacity: .78;
  transition: opacity var(--transition), color var(--transition),
              background var(--transition), border-color var(--transition),
              transform var(--transition), box-shadow var(--transition);
}
[data-theme="dark"] .chat-clear {
  box-shadow: 0 1px 3px rgba(0, 0, 0, .3), 0 4px 12px rgba(0, 0, 0, .25);
}
.chat-clear svg {
  color: #ef4444;
  transition: transform var(--transition), color var(--transition);
  flex-shrink: 0;
}
.chat-clear:hover,
.chat-clear:focus-visible {
  opacity: 1;
  color: #ef4444;
  background: color-mix(in srgb, var(--bg-elev) 94%, transparent);
  border-color: rgba(239, 68, 68, .5);
  box-shadow: 0 2px 6px rgba(239, 68, 68, .18), 0 8px 20px rgba(239, 68, 68, .12);
  outline: none;
}
.chat-clear:hover svg { transform: rotate(-8deg) scale(1.08); }
.chat-clear:active { transform: scale(.95); transition-duration: 60ms; }

@media (max-width: 720px) {
  .chat-clear span { display: none; }
  .chat-clear { padding: .45rem .55rem; }
  .messages { padding-top: 3.4rem; }
}

/* ---------- messages ---------- */
.msg {
  display: flex;
  gap: .85rem;
  align-items: flex-start;
  animation: fadeUp .25s ease both;
  scroll-margin-top: 3.2rem;
}
.msg.user { flex-direction: row-reverse; }

.avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 1rem;
  flex-shrink: 0;
  background: var(--bg-side);
  border: 1px solid var(--border);
}
.msg.user .avatar { background: var(--accent); color: #fff; border-color: transparent; }

.bubble {
  max-width: min(78%, 620px);
  padding: .75rem 1rem;
  border-radius: 18px;
  background: var(--bot-bubble);
  border: 1px solid var(--border);
  word-wrap: break-word;
  box-shadow: var(--shadow);
  position: relative;
  line-height: 1.55;
}
.msg.user .bubble {
  background: var(--user-bubble);
  color: var(--user-fg);
  border-color: transparent;
}
.bubble a { color: var(--accent); }

.bubble .actions {
  position: absolute;
  top: -14px;
  right: 6px;
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--transition), transform var(--transition);
  pointer-events: none;
}
.bubble:hover .actions,
.bubble:focus-within .actions {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.bubble .actions button {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: .28rem .65rem;
  font-size: .72rem;
  font-family: inherit;
  cursor: pointer;
  color: var(--fg-dim);
  box-shadow: var(--shadow);
  transition: color var(--transition), background var(--transition),
              border-color var(--transition), transform var(--transition);
}
.bubble .actions button:hover { color: var(--fg); transform: translateY(-1px); }
.bubble .actions button:active { transform: translateY(0) scale(.96); }
.bubble .actions button .ico { font-size: .85rem; line-height: 1; transition: transform var(--transition); }
.bubble .actions button .lbl { font-size: .7rem; font-weight: 500; }
.bubble .actions button.copied {
  color: #16a34a;
  border-color: rgba(22, 163, 74, .45);
  background: rgba(22, 163, 74, .1);
  animation: pop .35s cubic-bezier(.34, 1.56, .64, 1);
}
.bubble .actions button.copied .ico { transform: scale(1.15); }

.bubble.copy-flash { animation: bubbleFlash 1.1s ease; }
@keyframes bubbleFlash {
  0%   { box-shadow: var(--shadow), 0 0 0 0 rgba(37, 99, 235, .35); }
  40%  { box-shadow: var(--shadow), 0 0 0 6px rgba(37, 99, 235, 0); }
  100% { box-shadow: var(--shadow), 0 0 0 0 rgba(37, 99, 235, 0); }
}
@keyframes pop {
  0%   { transform: scale(.85); }
  55%  { transform: scale(1.08); }
  100% { transform: scale(1); }
}

.copy-toast {
  position: absolute;
  bottom: -8px;
  left: 50%;
  transform: translate(-50%, 12px);
  background: var(--fg);
  color: var(--bg);
  font-size: .72rem;
  padding: .3rem .7rem;
  border-radius: 8px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s ease, transform .22s cubic-bezier(.34, 1.56, .64, 1);
  z-index: 5;
}
.copy-toast.show { opacity: 1; transform: translate(-50%, 22px); }
[data-theme="dark"] .copy-toast {
  background: var(--bg-elev);
  color: var(--fg);
  border: 1px solid var(--border);
}

/* ---------- code blocks ---------- */
.code-block {
  margin: .7em 0;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, .04);
}
[data-theme="dark"] .code-block { background: rgba(255, 255, 255, .04); }
.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .35rem .7rem;
  background: rgba(0, 0, 0, .05);
  border-bottom: 1px solid var(--border);
  font-size: .75rem;
  gap: .5rem;
}
[data-theme="dark"] .code-head { background: rgba(255, 255, 255, .04); }
.code-lang {
  color: var(--fg-dim);
  font-family: ui-monospace, monospace;
  text-transform: lowercase;
  letter-spacing: .05em;
}
.code-copy {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg-dim);
  padding: .18rem .55rem;
  border-radius: 6px;
  font-size: .72rem;
  cursor: pointer;
  font-family: inherit;
  transition: color var(--transition), background var(--transition),
              border-color var(--transition), transform var(--transition);
  flex-shrink: 0;
}
.code-copy:hover { color: var(--fg); background: var(--bg-side); }
.code-copy:active { transform: scale(.95); }
.code-copy.copied {
  color: #16a34a;
  border-color: rgba(22, 163, 74, .4);
  background: rgba(22, 163, 74, .08);
  animation: pop .35s cubic-bezier(.34, 1.56, .64, 1);
}
.code-block pre {
  margin: 0;
  padding: .8rem .95rem;
  overflow-x: auto;
  background: transparent;
  border: 0;
  border-radius: 0;
  font-family: ui-monospace, 'JetBrains Mono', 'Fira Code', monospace;
  font-size: .85em;
  line-height: 1.5;
}
.code-block pre code {
  background: transparent;
  padding: 0;
  font-size: 1em;
  border-radius: 0;
}
.bubble code {
  background: rgba(0, 0, 0, .06);
  padding: .1em .35em;
  border-radius: 4px;
  font-size: .9em;
  font-family: ui-monospace, monospace;
}
[data-theme="dark"] .bubble code { background: rgba(255, 255, 255, .08); }

/* ---------- правая навигация ---------- */
.chat-toc {
  border-left: 1px solid var(--border);
  padding: 1.25rem .75rem 1rem;
  overflow-y: auto;
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: .15rem;
}
.chat-toc .toc-title {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--fg-dim);
  padding: .25rem .55rem .75rem;
  font-weight: 600;
}
.toc-empty {
  font-size: .82rem;
  color: var(--fg-dim);
  padding: .75rem .5rem;
  text-align: center;
  font-style: italic;
}
.toc-item {
  padding: .5rem .6rem;
  border-radius: 8px;
  font-size: .8rem;
  color: var(--fg-dim);
  cursor: pointer;
  border-left: 2px solid transparent;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  line-height: 1.35;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  user-select: none;
}
.toc-item:hover { background: rgba(127, 127, 127, .08); color: var(--fg); }
.toc-item.active {
  background: rgba(37, 99, 235, .08);
  color: var(--accent);
  border-left-color: var(--accent);
}

/* ---------- typing ---------- */
.typing { display: inline-flex; gap: 4px; padding: .3rem 0; }
.typing span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--fg-dim);
  animation: bounce 1.2s infinite;
}
.typing span:nth-child(2) { animation-delay: .15s; }
.typing span:nth-child(3) { animation-delay: .3s; }

@keyframes bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: .5; }
  30% { transform: translateY(-4px); opacity: 1; }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.empty-hint {
  color: var(--fg-dim);
  font-size: .92rem;
  text-align: center;
  padding: 2rem 1rem;
}

/* ---------- composer ---------- */
.composer {
  display: flex;
  align-items: flex-end;
  gap: .5rem;
  padding: .75rem 1rem;
  padding-bottom: max(.75rem, env(safe-area-inset-bottom));
  flex-shrink: 0;
}
.composer .wrap {
  flex: 1;
  display: flex;
  align-items: flex-end;
  gap: .5rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: .5rem .5rem .5rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}
.composer .wrap:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
}
.composer textarea {
  flex: 1;
  resize: none;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--fg);
  font: inherit;
  max-height: 180px;
  padding: .4rem 0;
  font-size: 16px;
}
@media (min-width: 720px) {
  .composer textarea { font-size: 15px; }
}
.composer .wrap #attach-btn {
  background: transparent;
  border: 0;
  font-size: 1.15rem;
  cursor: pointer;
  padding: 0 .25rem .35rem;
  color: var(--fg-dim);
  transition: color var(--transition), transform var(--transition);
}
.composer .wrap #attach-btn:hover {
  color: var(--accent);
  transform: scale(1.1);
}
.composer button[type="submit"] {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 0;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  display: grid; place-items: center;
  transition: transform var(--transition), background var(--transition);
  flex-shrink: 0;
}
.composer button[type="submit"]:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: scale(1.05);
}
.composer button[type="submit"]:disabled { opacity: .4; cursor: not-allowed; }

/* ---------- pages ---------- */
.page {
  padding: 2rem 1.25rem;
  overflow-y: auto;
  max-width: 860px;
  width: 100%;
  margin: 0 auto;
}
.page.narrow { max-width: 520px; }
.page h1 { font-size: 1.6rem; margin-bottom: 1.25rem; }
.page h2 { font-size: 1.1rem; margin: 1.5rem 0 .75rem; }
.page hr { border: 0; border-top: 1px solid var(--border); margin: 1.5rem 0; }

.back {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: transparent;
  border: 1px solid transparent;
  color: var(--fg-dim);
  font-family: inherit;
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  padding: .4rem .65rem .4rem .5rem;
  border-radius: 10px;
  margin-bottom: .75rem;
  transition: color var(--transition), background var(--transition),
              border-color var(--transition), transform var(--transition);
}
.back:hover {
  color: var(--accent);
  background: rgba(37, 99, 235, .08);
  border-color: rgba(37, 99, 235, .18);
  transform: translateX(-3px);
}
.back:active { transform: translateX(0) scale(.97); }
.back svg { transition: transform var(--transition); }
.back:hover svg { transform: translateX(-2px); }

.muted { color: var(--fg-dim); font-size: .9rem; }
.error { color: #ef4444; font-size: .88rem; margin-top: .5rem; min-height: 1.2em; }

/* ---------- forms ---------- */
.form input, .form select, .form textarea,
.card input, .card select {
  width: 100%;
  padding: .75rem 1rem;
  margin: .35rem 0;
  font-size: 1rem;
  color: var(--fg);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  outline: 0;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form input:focus, .form select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
}
.form button, .page > button {
  width: 100%;
  padding: .8rem 1rem;
  margin-top: .75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 12px;
  border: 0;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.form button:hover, .page > button:hover { background: var(--accent-hover); }
.form button:active, .page > button:active { transform: scale(.98); }

button.secondary {
  background: var(--bg-elev) !important;
  color: var(--fg) !important;
  border: 1px solid var(--border) !important;
}
button.secondary:hover { background: var(--bg-side) !important; }

/* ---------- onboarding ---------- */
.onboard { padding-top: 3rem; }
.onboard h1 { text-align: center; margin-bottom: .5rem; }
.onboard > .muted { text-align: center; display: block; margin-bottom: 1.5rem; }
.onboard .form label {
  display: block;
  font-size: .85rem;
  color: var(--fg-dim);
  margin: .85rem 0 .25rem;
}
.onboard .form a { color: var(--accent); text-decoration: none; }
.onboard .form a:hover { text-decoration: underline; }

/* ---------- code box ---------- */
.code-box {
  display: flex;
  align-items: center;
  gap: .5rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: .75rem 1rem;
  margin-top: .75rem;
  box-shadow: var(--shadow);
}
.code-box code {
  flex: 1;
  font-family: ui-monospace, 'JetBrains Mono', monospace;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent);
  text-align: center;
}
.code-box button {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: .35rem .55rem;
  cursor: pointer;
  font-size: 1rem;
  color: var(--fg);
  transition: background var(--transition);
}
.code-box button:hover { background: var(--bg-side); }

/* ---------- profile ---------- */
.profile-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
}
.profile-card p { margin: .25rem 0; }

/* ---------- docs ---------- */
.docs-list { display: grid; gap: .65rem; }
.doc-item {
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-elev);
  cursor: pointer;
  position: relative;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.doc-item:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.doc-item b { display: block; margin-bottom: .3rem; }
.doc-item p { color: var(--fg-dim); font-size: .9rem; }

.doc-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .5rem;
  padding-right: 3.2rem;
}
.badges { display: flex; gap: .35rem; flex-wrap: wrap; }
.badge {
  font-size: .7rem;
  padding: .15rem .45rem;
  border-radius: 6px;
  background: var(--bg-side);
  color: var(--fg-dim);
  border: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: .04em;
}
.badge-mine {
  background: rgba(37, 99, 235, .12);
  color: var(--accent);
  border-color: transparent;
}
.badge-other {
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  color: var(--accent);
  border-color: transparent;
}

.doc-item .del-btn {
  position: absolute;
  top: .75rem;
  right: .75rem;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--bg-side);
  border: 1px solid var(--border);
  color: var(--fg-dim);
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: 0;
  transform: scale(.85) rotate(-8deg);
  transition:
    opacity var(--transition),
    transform var(--transition),
    color var(--transition),
    background var(--transition),
    border-color var(--transition),
    box-shadow var(--transition);
  z-index: 2;
}
.doc-item:hover .del-btn,
.doc-item:focus-within .del-btn {
  opacity: 1;
  transform: scale(1) rotate(0);
}
.doc-item .del-btn:hover {
  color: #ef4444;
  background: rgba(239, 68, 68, .12);
  border-color: rgba(239, 68, 68, .4);
  box-shadow: 0 6px 16px rgba(239, 68, 68, .28);
  transform: scale(1.12) rotate(-10deg);
}
.doc-item .del-btn:active {
  transform: scale(.92) rotate(0);
  transition-duration: 60ms;
}
@media (max-width: 720px) {
  .doc-item .del-btn { opacity: .8; transform: scale(1); }
}

.doc-item.removing {
  animation: removeItem .22s ease forwards;
  pointer-events: none;
}
@keyframes removeItem {
  to {
    opacity: 0;
    transform: translateX(-12px) scale(.96);
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    margin-top: 0;
    border-width: 0;
  }
}

.doc-content {
  white-space: pre-wrap;
  word-wrap: break-word;
  background: var(--bg-side);
  padding: 1rem;
  border-radius: 12px;
  max-height: 65vh;
  overflow: auto;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: .85rem;
  border: 1px solid var(--border);
}

/* ---------- admin ---------- */
.stats {
  display: flex;
  gap: 1.5rem;
  padding: .85rem 1rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.users-list { display: grid; gap: .5rem; }
.user-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .75rem;
  padding: .65rem .9rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.user-row select {
  padding: .4rem .6rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--fg);
  font: inherit;
  font-size: .85rem;
}
.user-row code {
  font-family: ui-monospace, monospace;
  font-size: .85rem;
  color: var(--accent);
}

/* ---------- skeleton ---------- */
.skeleton {
  height: 1rem;
  background: linear-gradient(90deg, var(--border) 25%, var(--bg-side) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s infinite;
  border-radius: 6px;
}
@keyframes shimmer { to { background-position: -200% 0; } }

/* ---------- modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0);
  display: grid;
  place-items: center;
  padding: 1rem;
  transition: background .22s ease;
  backdrop-filter: blur(0px);
}
.modal-overlay.show {
  background: rgba(0, 0, 0, .45);
  backdrop-filter: blur(3px);
}
.modal {
  width: 100%;
  max-width: 400px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.5rem 1.4rem 1.25rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .25);
  text-align: center;
  transform: scale(.9) translateY(10px);
  opacity: 0;
  transition: transform .24s cubic-bezier(.34, 1.56, .64, 1), opacity .18s ease;
}
.modal-overlay.show .modal {
  transform: scale(1) translateY(0);
  opacity: 1;
}
.modal-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto .85rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  background: var(--bg-side);
  border: 1px solid var(--border);
}
.modal-icon.danger {
  background: rgba(239, 68, 68, .12);
  border-color: rgba(239, 68, 68, .3);
  animation: modalIconShake .5s ease .1s;
}
@keyframes modalIconShake {
  0%, 100% { transform: rotate(0); }
  25%      { transform: rotate(-8deg) scale(1.08); }
  50%      { transform: rotate(8deg) scale(1.08); }
  75%      { transform: rotate(-4deg) scale(1.04); }
}
.modal-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: .5rem;
}
.modal-text {
  font-size: .92rem;
  color: var(--fg-dim);
  line-height: 1.5;
  margin-bottom: 1.35rem;
  word-wrap: break-word;
}
.modal-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem;
}
.modal-btn {
  padding: .7rem 1rem;
  font-size: .95rem;
  font-weight: 600;
  border-radius: 12px;
  border: 1px solid transparent;
  font-family: inherit;
  cursor: pointer;
  transition:
    background var(--transition),
    border-color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}
.modal-btn:active { transform: scale(.97); }
.modal-btn.cancel {
  background: var(--bg-side);
  color: var(--fg);
  border-color: var(--border);
}
.modal-btn.cancel:hover { background: var(--bg); }
.modal-btn.primary { background: var(--accent); color: #fff; }
.modal-btn.primary:hover { background: var(--accent-hover); }
.modal-btn.danger {
  background: #dc2626;
  color: #fff;
  box-shadow: 0 4px 12px rgba(220, 38, 38, .28);
}
.modal-btn.danger:hover {
  background: #b91c1c;
  box-shadow: 0 6px 18px rgba(220, 38, 38, .38);
  transform: translateY(-1px);
}
.modal-btn.danger:active { transform: translateY(0) scale(.97); }
.modal-btn:focus-visible { outline: 3px solid rgba(37, 99, 235, .35); outline-offset: 2px; }
.modal-btn.danger:focus-visible { outline-color: rgba(220, 38, 38, .45); }

/* =====================================================
   ROLE CHIP (постоянный индикатор админа)
===================================================== */
.role-chip {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .28rem .7rem;
  margin: 0 .5rem .75rem;
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #fff;
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .08em;
  border-radius: 999px;
  box-shadow: 0 2px 8px rgba(239, 68, 68, .35);
  align-self: flex-start;
  text-transform: uppercase;
  user-select: none;
}
.role-chip[hidden] { display: none !important; }

/* =====================================================
   TOAST (замена alert)
===================================================== */
.toast-host {
  position: fixed;
  top: max(1rem, env(safe-area-inset-top));
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  pointer-events: none;
  max-width: calc(100% - 2rem);
  align-items: center;
}
.toast {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: .7rem 1.1rem;
  border-radius: 12px;
  font-size: .9rem;
  font-weight: 500;
  box-shadow: 0 8px 32px rgba(0, 0, 0, .18);
  opacity: 0;
  transform: translateY(-10px) scale(.96);
  transition: opacity .22s ease, transform .26s cubic-bezier(.34, 1.56, .64, 1);
  pointer-events: auto;
  max-width: 420px;
  text-align: center;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
}
.toast.show { opacity: 1; transform: translateY(0) scale(1); }
.toast-success {
  border-color: rgba(22, 163, 74, .4);
  background: color-mix(in srgb, #16a34a 10%, var(--bg-elev));
  color: #16a34a;
}
.toast-error {
  border-color: rgba(239, 68, 68, .4);
  background: color-mix(in srgb, #ef4444 10%, var(--bg-elev));
  color: #ef4444;
}

/* =====================================================
   FILE DROPZONE
===================================================== */
.dropzone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 1.5rem 1rem;
  border: 2px dashed color-mix(in srgb, var(--accent) 40%, var(--border));
  border-radius: 14px;
  background: color-mix(in srgb, var(--accent) 4%, var(--bg-elev));
  cursor: pointer;
  text-align: center;
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  user-select: none;
}
.dropzone:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 7%, var(--bg-elev));
}
.dropzone.dragover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-elev));
  transform: scale(1.005);
}
.dropzone.dragover .dropzone-icon {
  transform: translateY(-3px) scale(1.08);
  color: var(--accent);
}
.dropzone.uploading { pointer-events: none; opacity: .7; }
.dropzone.done {
  border-style: solid;
  border-color: #16a34a;
  background: rgba(22, 163, 74, .08);
}
.dropzone-icon {
  font-size: 2rem;
  line-height: 1;
  color: var(--fg-dim);
  transition: transform var(--transition), color var(--transition);
}
.dropzone-title { font-weight: 600; font-size: .95rem; color: var(--fg); }
.dropzone-hint { font-size: .82rem; color: var(--fg-dim); }
.dropzone-hint b { color: var(--accent); font-weight: 600; }
.dropzone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}
.upload-progress {
  margin-top: .6rem;
  height: 4px;
  border-radius: 4px;
  background: var(--border);
  overflow: hidden;
  display: none;
}
.upload-progress.active { display: block; }
.upload-progress > div {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width .2s ease;
}
.upload-status {
  margin-top: .6rem;
  font-size: .88rem;
  color: var(--fg-dim);
  min-height: 1.2em;
}
.upload-status.ok { color: #16a34a; }
.upload-status.err { color: #ef4444; }
.dropzone-formats {
  display: inline-flex;
  gap: .3rem;
  margin-top: .25rem;
}
.dropzone-formats span {
  font-size: .7rem;
  padding: .12rem .4rem;
  border-radius: 6px;
  background: var(--bg-side);
  color: var(--fg-dim);
  border: 1px solid var(--border);
  font-family: ui-monospace, monospace;
  text-transform: uppercase;
}

/* =====================================================
   MOBILE
===================================================== */
@media (max-width: 1100px) {
  .chat { grid-template-columns: 1fr; }
  .chat-toc { display: none; }
}

@media (max-width: 720px) {
  body { grid-template-columns: 1fr; }
  main { grid-column: 1; }

  #drawer {
    position: fixed;
    top: 0; left: 0;
    width: 80%;
    max-width: 300px;
    height: 100dvh;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform .25s cubic-bezier(.4, 0, .2, 1);
    box-shadow: 4px 0 24px rgba(0, 0, 0, .15);
  }
  #drawer.open { transform: translateX(0); }

  #topbar { display: flex; }

  .bubble { max-width: 85%; }
}

/* ---------- scrollbars ---------- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--fg-dim); }

/* =====================================================
   UPLOAD LIST (список загружаемых файлов)
===================================================== */
.upload-list {
  list-style: none;
  margin: .6rem 0 0;
  padding: 0;
  display: none;
  flex-direction: column;
  gap: .3rem;
}
.upload-list.active { display: flex; }

.upload-row-item {
  display: grid;
  grid-template-columns: 24px 1fr auto;
  align-items: center;
  gap: .5rem;
  padding: .45rem .7rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: .85rem;
  animation: fadeUp .22s ease both;
}
.upload-row-item .uli-icon {
  font-size: 1rem;
  line-height: 1;
  text-align: center;
}
.upload-row-item .uli-name {
  color: var(--fg);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.upload-row-item .uli-info {
  color: var(--fg-dim);
  font-size: .78rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.upload-row-item.err {
  border-color: rgba(239, 68, 68, .35);
  background: rgba(239, 68, 68, .06);
}
.upload-row-item.err .uli-info { color: #ef4444; }

/* индикация «идёт загрузка» — пульсация иконки */
.upload-row-item:not(.err) .uli-icon:not(:empty) {
  transition: transform var(--transition);
}
.dropzone.uploading ~ .upload-list .upload-row-item .uli-icon {
  animation: uploadPulse 1.2s ease-in-out infinite;
}
@keyframes uploadPulse {
  0%, 100% { opacity: .5; transform: scale(.9); }
  50%      { opacity: 1; transform: scale(1.05); }
}

/* =====================================================
   DOCS TOOLBAR (поиск, фильтры, сортировка)
===================================================== */
.docs-toolbar {
  display: flex;
  flex-direction: column;
  gap: .65rem;
  margin: 1rem 0;
}
.search-box { position: relative; }
.search-box input {
  width: 100%;
  padding: .7rem 1rem;
  font-size: 1rem;
  color: var(--fg);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  outline: 0;
  font-family: inherit;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-box input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, .15);
}
.search-box input::-webkit-search-cancel-button { cursor: pointer; }

.filter-chips {
  display: flex;
  gap: .4rem;
  flex-wrap: wrap;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .4rem .8rem;
  border-radius: 999px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  color: var(--fg-dim);
  font: inherit;
  font-size: .82rem;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition:
    color var(--transition),
    background var(--transition),
    border-color var(--transition),
    transform var(--transition);
}
.chip:hover {
  color: var(--fg);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}
.chip:active { transform: scale(.97); }
.chip.active {
  background: color-mix(in srgb, var(--accent) 12%, var(--bg-elev));
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 600;
}
.chip-count {
  font-size: .72rem;
  opacity: .7;
  font-variant-numeric: tabular-nums;
}
.chip.active .chip-count { opacity: 1; }

.toolbar-right {
  display: flex;
  gap: .75rem;
  align-items: center;
  flex-wrap: wrap;
}
.sort-select {
  padding: .45rem .75rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--fg);
  font: inherit;
  font-size: .85rem;
  cursor: pointer;
  transition: border-color var(--transition);
}
.sort-select:focus {
  outline: 0;
  border-color: var(--accent);
}
.switch {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-size: .85rem;
  color: var(--fg-dim);
  cursor: pointer;
  user-select: none;
}
.switch input { accent-color: var(--accent); cursor: pointer; }

/* =====================================================
   DOC GROUPS (структуризация списка)
===================================================== */
.docs-group {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--bg-elev);
  margin-bottom: .7rem;
  overflow: hidden;
  animation: fadeUp .22s ease both;
}
.docs-group-head {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .8rem 1rem;
  background: color-mix(in srgb, var(--bg-side) 60%, transparent);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
}
.docs-group-head:hover { background: var(--bg-side); }
.docs-group-title { font-weight: 600; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.docs-group-count {
  background: var(--bg-side);
  color: var(--fg-dim);
  padding: .1rem .55rem;
  border-radius: 999px;
  font-size: .75rem;
  font-variant-numeric: tabular-nums;
  border: 1px solid var(--border);
}
.docs-group-chevron {
  transition: transform .22s ease;
  font-size: .8rem;
  color: var(--fg-dim);
  flex-shrink: 0;
}
.docs-group.collapsed .docs-group-chevron { transform: rotate(-90deg); }
.docs-group.collapsed .docs-group-body { display: none; }

.docs-group-body {
  padding: .5rem;
  display: grid;
  gap: .5rem;
}
.docs-group-body .doc-item { border-radius: 10px; }

/* =====================================================
   USERS TOOLBAR (поиск и фильтры в админке)
===================================================== */
.users-toolbar {
  display: flex;
  flex-direction: column;
  gap: .65rem;
  margin: 1rem 0;
}

.user-row .user-info {
  min-width: 0;
  flex: 1;
}
.user-row .user-info b {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* =====================================================
   PWA: offline badge
===================================================== */
body.offline::before {
  content: "⚡ Оффлайн-режим";
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  background: #f59e0b;
  color: #fff;
  font-size: .75rem;
  font-weight: 600;
  padding: .28rem .85rem;
  border-radius: 0 0 10px 10px;
  z-index: 400;
  pointer-events: none;
  box-shadow: 0 4px 12px rgba(245, 158, 11, .35);
  animation: fadeUp .25s ease both;
}

/* =====================================================
   PWA: install banner
===================================================== */
.install-banner {
  position: fixed;
  bottom: max(1rem, env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  z-index: 250;
  display: flex;
  align-items: center;
  gap: .7rem;
  padding: .75rem .9rem;
  max-width: min(520px, calc(100% - 1rem));
  width: max-content;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, .22);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s cubic-bezier(.34, 1.56, .64, 1);
}
.install-banner.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.install-banner .ib-icon {
  width: 38px; height: 38px;
  display: grid; place-items: center;
  font-size: 1.2rem;
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border-radius: 10px;
  flex-shrink: 0;
}
.install-banner .ib-text {
  display: flex;
  flex-direction: column;
  font-size: .85rem;
  line-height: 1.3;
  min-width: 0;
}
.install-banner .ib-text b { color: var(--fg); }
.install-banner .ib-text span { color: var(--fg-dim); font-size: .78rem; }
.install-banner .ib-btn {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 10px;
  padding: .5rem .85rem;
  font: inherit;
  font-weight: 600;
  font-size: .85rem;
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition);
}
.install-banner .ib-btn:hover { background: var(--accent-hover); }
.install-banner .ib-btn:active { transform: scale(.96); }
.install-banner .ib-close {
  background: transparent;
  border: 0;
  color: var(--fg-dim);
  font-size: 1rem;
  cursor: pointer;
  padding: .25rem .4rem;
  border-radius: 6px;
  flex-shrink: 0;
}
.install-banner .ib-close:hover { color: var(--fg); }

/* сайдбарная кнопка установки */
.install-sidebar {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-top: .75rem;
  padding: .65rem .75rem;
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  border: 1px dashed color-mix(in srgb, var(--accent) 50%, var(--border));
  border-radius: 10px;
  color: var(--accent);
  font: inherit;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}
.install-sidebar:hover {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  border-color: var(--accent);
}
.install-sidebar:active { transform: scale(.98); }
.install-sidebar[hidden] { display: none !important; }

/* =====================================================
   PWA: уведомления в профиле
===================================================== */
.notif-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin: .6rem 0;
  padding: .7rem .9rem;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
}
.notif-row .muted { flex: 1; }
.notif-row button {
  width: auto !important;
  margin: 0 !important;
  padding: .5rem .85rem !important;
  font-size: .85rem !important;
}