/* Палитра НалогУчёт; тёмная тема — по настройке устройства. */
:root {
  --bg: #F6F2EC; --surface: #FFFFFF; --surface-2: #E8E2DA; --text: #18324D; --muted: #6E7E8D;
  --line: rgba(24,50,77,.17); --primary: #0E2A47; --on-primary: #F8FAFC; --bad: #C8443A;
  --error-bg: #F7E3E1; --shadow: 0 1px 3px rgba(24,50,77,.08); color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0E2A47; --surface: #163E66; --surface-2: #0B2239; --text: #F8FAFC; --muted: #9BB4CD;
    --line: rgba(255,255,255,.14); --primary: #D4A64A; --on-primary: #0E2A47; --error-bg: #4A2230;
    --shadow: none; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
a { color: inherit; }
input, textarea, button { font: inherit; }
input, textarea { width: 100%; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); color: var(--text); }
button { padding: 8px 16px; border: 0; border-radius: 8px; background: var(--primary); color: var(--on-primary); cursor: pointer; }
button:disabled { opacity: .6; cursor: default; }
button.small { padding: 4px 10px; font-size: 13px; }
button.link { background: none; border: 0; color: inherit; text-decoration: underline; padding: 0; }
.page { max-width: 640px; margin: 0 auto; padding: 24px 16px; }
.stack { display: grid; gap: 12px; }
.stack label { display: grid; gap: 4px; }
.error { background: var(--error-bg); padding: 8px 12px; border-radius: 8px; margin: 8px 16px; }
.muted { color: var(--muted); }
.bad { color: var(--bad); }
.card { background: var(--surface); border-radius: 12px; padding: 12px 16px; box-shadow: var(--shadow); margin: 12px 0; }
.people { width: 100%; border-collapse: collapse; margin: 12px 0; }
.people td { padding: 8px 4px; border-bottom: 1px solid var(--line); vertical-align: top; }
.people form { display: inline-block; margin: 0 4px 4px 0; }

/* Чаты: две колонки на компьютере, одна на телефоне. */
body.app { height: 100dvh; overflow: hidden; }
.layout { display: grid; grid-template-columns: minmax(280px, 360px) 1fr; height: 100dvh; }
.side { display: flex; flex-direction: column; min-height: 0; border-right: 1px solid var(--line); background: var(--surface); }
.top { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 12px 16px; }
.top h1 { margin: 0; font-size: 20px; }
.top nav { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.top nav form { margin: 0; }
.tabs { display: flex; gap: 4px; padding: 0 12px 8px; }
.tabs button { flex: 1; padding: 6px 4px; font-size: 13px; background: transparent; color: var(--muted); border: 1px solid var(--line); }
.tabs button[aria-selected="true"] { background: var(--primary); color: var(--on-primary); border-color: var(--primary); }
#q { margin: 0 12px 8px; width: auto; }
.list { flex: 1; margin: 0; padding: 0; list-style: none; overflow-y: auto; }
.list-empty { padding: 0 16px; }
.row { padding: 10px 16px; border-bottom: 1px solid var(--line); cursor: pointer; }
.row:hover, .row.active { background: var(--surface-2); }
.row-top, .row-bottom { display: flex; align-items: center; gap: 6px; min-width: 0; }
.row-title, .row-preview { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row-preview { font-size: 13px; }
.row-at { font-size: 12px; }
.badge { padding: 1px 5px; border-radius: 4px; font-size: 10px; font-weight: 700; color: #fff; }
.badge.tg { background: #2AABEE; }
.badge.max { background: #7B4DFF; }
.wait { font-size: 12px; color: var(--bad); white-space: nowrap; }
.count { padding: 0 7px; border-radius: 10px; background: var(--primary); color: var(--on-primary); font-size: 12px; }
.pane, .pane-empty { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.pane-empty { align-items: center; justify-content: center; }
.pane[hidden], .pane-empty[hidden] { display: none; }
.chat-head { display: flex; align-items: center; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line); background: var(--surface); }
.chat-head > div { flex: 1; min-width: 0; }
.chat-head h2 { margin: 0; font-size: 17px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.back { display: none; }
.messages { flex: 1; display: flex; flex-direction: column; gap: 8px; padding: 16px; overflow-y: auto; }
.msg { max-width: min(560px, 85%); padding: 8px 12px; border-radius: 12px; background: var(--surface); box-shadow: var(--shadow); }
.msg.mine { align-self: flex-end; background: var(--surface-2); }
.msg.failed { outline: 2px solid var(--bad); }
.who { font-size: 12px; font-weight: 600; color: var(--muted); }
.body { white-space: pre-wrap; overflow-wrap: anywhere; }
.kind { font-size: 13px; color: var(--muted); }
.meta { font-size: 11px; color: var(--muted); text-align: right; }
.err { font-size: 12px; color: var(--bad); }
.composer { display: flex; gap: 8px; padding: 10px 16px; border-top: 1px solid var(--line); background: var(--surface); }
.composer textarea { flex: 1; min-height: 44px; max-height: 40vh; resize: vertical; }
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  body.chat-open .side, body.chat-open .pane-empty { display: none; }
  body:not(.chat-open) .pane, body:not(.chat-open) .pane-empty { display: none; }
  .back { display: inline-block; }
}