:root {
  --bg: #f4f6fb; --fg: #0f172a; --muted: #64748b; --card: #fff; --line: #e2e8f0;
  --accent: #2563eb; --accent-fg: #fff; --me: #2563eb; --me-fg: #fff; --them: #fff;
  --warn-bg: #fff7e6; --warn-line: #f59e0b; --crit-bg: #fdecec; --crit-line: #dc2626;
  --info-bg: #eaf2ff; --info-line: #2563eb; --err: #dc2626;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120; --fg: #e2e8f0; --muted: #94a3b8; --card: #111a2e; --line: #1e293b;
    --accent: #3b82f6; --me: #2563eb; --them: #17223a;
    --warn-bg: #2a2110; --crit-bg: #2b1414; --info-bg: #0f1d36; --err: #f87171;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; } /* иначе .login{display:grid} и т.п. перебивают атрибут hidden */
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--fg); font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.wrap { max-width: 640px; margin: 0 auto; padding: 16px; min-height: 100%; display: flex; flex-direction: column; gap: 12px; }
.top { display: flex; align-items: center; justify-content: space-between; }
h1 { font-size: 22px; margin: 4px 0; }
.conn { font-size: 13px; color: var(--muted); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 16px; }
.muted { color: var(--muted); }
.label { display: block; font-weight: 600; margin-bottom: 8px; }
input, textarea { width: 100%; font: inherit; color: inherit; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.hint { color: var(--muted); font-size: 14px; margin: 8px 0 14px; }
.btn { font: inherit; font-weight: 600; border: 0; border-radius: 10px; padding: 10px 16px; background: var(--accent); color: var(--accent-fg); cursor: pointer; }
.btn:disabled { opacity: .6; cursor: default; }
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); }
.btn.wide { width: 100%; }
.link { background: none; border: 0; color: var(--muted); font: inherit; font-size: 14px; cursor: pointer; text-decoration: underline; align-self: center; padding: 6px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
.err { color: var(--err); font-size: 14px; margin: 10px 0 0; }

.banner { border-radius: 14px; padding: 16px; border: 1px solid var(--warn-line); border-left-width: 5px; background: var(--warn-bg); }
.banner.crit { border-color: var(--crit-line); background: var(--crit-bg); }
.banner.info { border-color: var(--info-line); background: var(--info-bg); }
.banner-title { font-weight: 700; margin-bottom: 6px; }
.banner-text { white-space: pre-wrap; margin: 0 0 8px; }
.banner-until { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.mini-banner { font-size: 14px; padding: 8px 12px; border-radius: 10px; background: var(--warn-bg); border: 1px solid var(--warn-line); white-space: pre-wrap; }

.chat { flex: 1; display: flex; flex-direction: column; gap: 8px; min-height: 0; }
.msgs { flex: 1; min-height: 50vh; max-height: calc(100dvh - 210px); overflow-y: auto; display: flex; flex-direction: column; gap: 6px; padding: 4px 2px; }
.msg { max-width: 82%; padding: 8px 12px; border-radius: 14px; white-space: pre-wrap; word-wrap: break-word; overflow-wrap: anywhere; }
.msg .t { display: block; font-size: 11px; opacity: .65; margin-top: 2px; text-align: right; }
.msg.client { align-self: flex-end; background: var(--me); color: var(--me-fg); border-bottom-right-radius: 4px; }
.msg.op { align-self: flex-start; background: var(--them); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg.op::before { content: "Поддержка"; display: block; font-size: 12px; font-weight: 600; color: var(--accent); }
.msg.system { align-self: center; background: none; color: var(--muted); font-size: 13px; text-align: center; max-width: 95%; }
.send { display: flex; gap: 8px; align-items: flex-end; }
.send textarea { resize: none; max-height: 140px; }
.send .btn { height: 44px; min-width: 48px; }