:root {
  --bg: #f4f6f5; --card: #ffffff; --text: #17201d; --muted: #66726e; --line: #e2e7e5;
  --accent: #0f6b5c; --accent-text: #ffffff; --in: #ffffff; --out: #d9efe9; --danger: #b3261e;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101513; --card: #19201d; --text: #e7eeeb; --muted: #94a39e; --line: #27312d;
    --accent: #3fb59c; --accent-text: #08201a; --in: #1f2824; --out: #17463c; --danger: #f2b8b5;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  display: flex; flex-direction: column; min-height: 100dvh;
}
.top {
  position: sticky; top: 0; z-index: 2; display: flex; align-items: center; gap: 8px;
  padding: calc(env(safe-area-inset-top) + 12px) 16px 12px; background: var(--card); border-bottom: 1px solid var(--line);
}
.top h1 { margin: 0; font-size: 18px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.back { border: 0; background: none; color: var(--accent); font-size: 30px; line-height: 1; padding: 0 8px 4px 0; cursor: pointer; }
main { flex: 1; display: flex; flex-direction: column; }
.tabs {
  position: sticky; bottom: 0; display: flex; background: var(--card); border-top: 1px solid var(--line);
  padding-bottom: env(safe-area-inset-bottom);
}
.tabs a, .tabs button {
  flex: 1; padding: 14px 4px; text-align: center; color: var(--muted); text-decoration: none;
  background: none; border: 0; font: inherit; font-size: 14px; cursor: pointer;
}
.tabs a.active { color: var(--accent); font-weight: 600; }

.login { margin: auto; width: 100%; max-width: 360px; padding: 24px 16px; display: flex; flex-direction: column; gap: 12px; }
.login h2 { margin: 0 0 4px; font-size: 26px; }
input, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--card);
  border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.btn {
  border: 0; border-radius: 12px; padding: 12px 16px; font: inherit; font-weight: 600;
  background: var(--accent); color: var(--accent-text); cursor: pointer;
}
.btn:disabled { opacity: .5; }
.error { color: var(--danger); font-size: 14px; min-height: 1.4em; margin: 0; }

.list { list-style: none; margin: 0; padding: 0; }
.list a { display: flex; gap: 12px; align-items: center; padding: 12px 16px; color: inherit; text-decoration: none; border-bottom: 1px solid var(--line); background: var(--card); }
.avatar { flex: none; width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; background: var(--out); color: var(--accent); font-weight: 700; }
.row-main { flex: 1; min-width: 0; }
.row-top { display: flex; justify-content: space-between; gap: 8px; }
.name, .preview, .chan { display: block; }
.name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.time { color: var(--muted); font-size: 13px; flex: none; }
.preview { color: var(--muted); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge { flex: none; min-width: 22px; height: 22px; padding: 0 6px; border-radius: 11px; background: var(--accent); color: var(--accent-text); font-size: 12px; display: grid; place-items: center; }
.chan { font-size: 12px; color: var(--muted); }

.empty { margin: auto; padding: 32px 24px; text-align: center; color: var(--muted); max-width: 340px; }

.chat { flex: 1; display: flex; flex-direction: column; gap: 6px; padding: 12px; overflow-y: auto; }
.msg { max-width: 82%; padding: 8px 12px; border-radius: 16px; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.in { align-self: flex-start; background: var(--in); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.msg.out { align-self: flex-end; background: var(--out); border-bottom-right-radius: 4px; }
.meta { display: block; font-size: 11px; color: var(--muted); text-align: right; margin-top: 2px; }
.composer {
  position: sticky; bottom: 0; display: flex; gap: 8px; align-items: flex-end; padding: 8px 12px calc(8px + env(safe-area-inset-bottom));
  background: var(--card); border-top: 1px solid var(--line);
}
.composer textarea { resize: none; max-height: 140px; border-radius: 20px; padding: 10px 14px; }
.composer .btn { border-radius: 20px; }

/* Широкий экран: слева список диалогов, справа переписка */
.split { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.side { display: none; }
@media (min-width: 900px) {
  .split { flex-direction: row; }
  .side { display: block; flex: none; width: 360px; overflow-y: auto; background: var(--card); border-right: 1px solid var(--line); }
  .side .list a.active, .side .list li.active a { background: var(--out); }
  .split main { flex: 1; min-width: 0; }
  .split .chat { max-width: 860px; width: 100%; margin: 0 auto; }
  .split .composer { max-width: 860px; width: 100%; margin: 0 auto; }
}

/* Экран «Каналы» */
.channels { padding: 12px 16px 24px; display: flex; flex-direction: column; gap: 12px; }
.toolbar { display: flex; gap: 8px; }
.hint { color: var(--muted); font-size: 14px; margin: 0; }
.list .account { display: flex; flex-direction: column; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--line); background: var(--card); }
.acc-head { display: flex; gap: 12px; align-items: center; }
.acc-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.btn.secondary { background: none; color: var(--accent); border: 1px solid var(--accent); }
.qr { display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; }
.qr img { width: 256px; max-width: 80vw; height: auto; background: #fff; padding: 12px; border-radius: 12px; }
.empty-row { padding: 16px; color: var(--muted); background: var(--card); }

/* Вложения в переписке */
.msg .media { display: block; max-width: 100%; border-radius: 10px; }
.msg audio.media { width: 240px; }
.msg img.media, .msg video.media { width: 260px; height: auto; }
.msg .doc { display: block; margin-bottom: 4px; color: var(--accent); font-weight: 600; overflow-wrap: anywhere; }

/* Прикрепление файла в поле ответа */
.composer { flex-wrap: wrap; }
.attach { flex: none; border: 0; background: none; font-size: 22px; line-height: 1; padding: 8px 4px; cursor: pointer; }
.attach:disabled { opacity: .5; }
.chip { flex: 1 0 100%; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 8px 12px; border-radius: 12px; background: var(--out); font-size: 14px; }
.chip-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip-x { flex: none; border: 0; background: none; color: var(--text); font-size: 22px; line-height: 1; cursor: pointer; padding: 0 4px; }
.composer .error { flex: 1 0 100%; min-height: 0; }
.composer .error:empty { display: none; }
.composer textarea { flex: 1; min-width: 0; }