:root {
  --bg: #f4f5f7; --panel: #fff; --text: #1d2129; --muted: #6b7280; --line: #e3e5e8;
  --accent: #6c3cf0; --accent-text: #fff; --client: #fff; --bot: #eef0f3; --operator: #e6dcff;
  --ok: #1f9d55; --warn: #d97706; --bad: #dc2626;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111317; --panel: #1a1d23; --text: #e6e8eb; --muted: #9aa1ab; --line: #2a2e36;
    --accent: #8b66ff; --client: #232730; --bot: #1e2229; --operator: #3a2d6b;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--text); font: 14px/1.4 system-ui, -apple-system, Segoe UI, Roboto, sans-serif; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; border: 0; border-radius: 6px; padding: 6px 12px; background: var(--accent); color: var(--accent-text); }
button.ghost { background: transparent; color: var(--text); border: 1px solid var(--line); }
button.danger { background: var(--bad); }
input, select, textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); }
.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--bad); min-height: 1.4em; }
.spacer { flex: 1; }
.row { display: flex; gap: 8px; align-items: center; }

.login { display: grid; place-items: center; min-height: 100%; padding: 16px; }
.login form { background: var(--panel); padding: 24px; border-radius: 10px; width: 100%; max-width: 340px; display: grid; gap: 10px; border: 1px solid var(--line); }
.login h1 { margin: 0; font-size: 20px; }
.login p { margin: 0; }

.app { display: flex; flex-direction: column; height: 100%; }
.topbar { display: flex; gap: 12px; align-items: center; padding: 8px 16px; background: var(--panel); border-bottom: 1px solid var(--line); }
.pill { border-radius: 999px; padding: 3px 10px; font-size: 12px; background: var(--muted); }
.pill.open { background: var(--ok); }
.pill.qr, .pill.connecting, .pill.starting { background: var(--warn); }
.pill.closed { background: var(--bad); }

.layout { flex: 1; display: grid; grid-template-columns: 340px 1fr; min-height: 0; }
.sidebar { border-right: 1px solid var(--line); background: var(--panel); display: flex; flex-direction: column; min-height: 0; }
.filters { padding: 10px; display: grid; gap: 8px; border-bottom: 1px solid var(--line); }
.tabs { display: flex; gap: 4px; flex-wrap: wrap; }
.tabs button { background: transparent; color: var(--muted); padding: 4px 8px; font-size: 12px; }
.tabs button.active { background: var(--accent); color: var(--accent-text); }
.conv-list { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
.conv-list li { padding: 10px 12px; border-bottom: 1px solid var(--line); cursor: pointer; display: grid; gap: 3px; }
.conv-list li:hover, .conv-list li.active { background: var(--bg); }
.conv-top { display: flex; gap: 6px; align-items: center; }
.conv-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-time { margin-left: auto; font-size: 11px; color: var(--muted); }
.conv-last { color: var(--muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge { background: var(--accent); color: var(--accent-text); border-radius: 999px; font-size: 11px; padding: 0 7px; }
.mode { font-size: 10px; text-transform: uppercase; letter-spacing: .04em; padding: 1px 6px; border-radius: 4px; border: 1px solid var(--line); color: var(--muted); }
.mode.human { border-color: var(--warn); color: var(--warn); }
.labels { display: flex; gap: 4px; flex-wrap: wrap; }
.label { font-size: 11px; padding: 1px 7px; border-radius: 999px; color: #fff; }

.chat { display: flex; flex-direction: column; min-height: 0; }
.chat .empty { margin: auto; }
.chat-head { padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); display: grid; gap: 8px; }
.chat-head .row { flex-wrap: wrap; }
.label-toggle { opacity: .35; cursor: pointer; border: 0; }
.label-toggle.on { opacity: 1; }
.messages { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 6px; }
.msg { max-width: 75%; padding: 7px 10px; border-radius: 8px; white-space: pre-wrap; word-wrap: break-word; border: 1px solid var(--line); }
.msg.client { background: var(--client); align-self: flex-start; }
.msg.bot { background: var(--bot); align-self: flex-end; }
.msg.operator { background: var(--operator); align-self: flex-end; }
.msg small { display: block; font-size: 10px; color: var(--muted); margin-top: 3px; }
.composer { display: flex; gap: 8px; padding: 10px; background: var(--panel); border-top: 1px solid var(--line); }
.composer textarea { resize: none; height: 44px; }
.back { display: none; }

dialog { border: 1px solid var(--line); border-radius: 10px; background: var(--panel); color: var(--text); max-width: 380px; width: calc(100% - 32px); }
dialog::backdrop { background: rgba(0,0,0,.5); }
dialog h2 { margin-top: 0; font-size: 18px; }
.qr-box { display: grid; place-items: center; min-height: 120px; margin: 12px 0; }
.qr-box img { width: 100%; max-width: 280px; background: #fff; padding: 8px; border-radius: 6px; }

@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  .layout.show-chat .sidebar { display: none; }
  .layout:not(.show-chat) .chat { display: none; }
  .back { display: inline-block; }
  .msg { max-width: 90%; }
}

.small { font-size: 12px; }
#labelsDialog { max-width: 460px; }
.labels-editor { display: grid; gap: 6px; max-height: 50vh; overflow-y: auto; margin-bottom: 10px; }
.label-row { display: flex; gap: 6px; align-items: center; }
.label-row input[type=color] { width: 40px; height: 34px; padding: 2px; flex: none; }
.label-row input[name=name] { flex: 1; min-width: 0; }
.label-row .uses { font-size: 11px; color: var(--muted); white-space: nowrap; }
.label-row button { flex: none; padding: 6px 9px; }