:root {
  color-scheme: light dark;
  --bg: #f3f4f6;
  --surface: #ffffff;
  --text: #16181d;
  --muted: #667085;
  --line: #e1e4ea;
  --accent: #2457d6;
  --on-accent: #ffffff;
  --good: #15803d;
  --bad: #c62828;
  --bubble: #e8ecf4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --surface: #181c22;
    --text: #e7e9ee;
    --muted: #98a1ad;
    --line: #2a303a;
    --accent: #7aa2ff;
    --on-accent: #0b1020;
    --good: #4ade80;
    --bad: #f87171;
    --bubble: #232a35;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body { height: 100%; margin: 0; }
body {
  display: flex;
  flex-direction: column;
  height: 100dvh;
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

button, input, select { font: inherit; color: inherit; }
select {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  padding: 8px 10px;
  max-width: 100%;
}
h1 { margin: 0; font-size: 1.5rem; }
p { margin: 0; }
.muted { color: var(--muted); }
.small { font-size: 0.8rem; }
.pad { padding: 16px; }
.error { color: var(--bad); }

.btn {
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  white-space: nowrap;
}
.btn:disabled { opacity: 0.45; cursor: default; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn.good { background: var(--good); border-color: var(--good); color: var(--on-accent); }
.btn.bad { background: var(--bad); border-color: var(--bad); color: var(--on-accent); }
.btn.ghost { background: transparent; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

input {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--surface);
  border-radius: 8px;
  padding: 9px 12px;
}

/* ---------- вход ---------- */
.join { flex: 1; display: grid; place-items: center; padding: 16px; }
.card {
  width: min(380px, 100%);
  display: grid;
  gap: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 24px;
}
.card label { display: grid; gap: 6px; font-size: 0.9rem; color: var(--muted); }
.card input { color: var(--text); font-size: 1rem; }

/* ---------- звонок ---------- */
.callbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
  padding: 10px 16px;
  background: var(--surface);
  border-bottom: 2px solid var(--good);
}
.callinfo { display: flex; flex-direction: column; min-width: 0; }
.callinfo span { font-size: 0.85rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.callbtns { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- основной экран ---------- */
.app { flex: 1; min-height: 0; display: grid; grid-template-columns: 280px 1fr; }
.side { display: flex; flex-direction: column; min-height: 0; background: var(--surface); border-right: 1px solid var(--line); }
.pane { display: flex; flex-direction: column; min-width: 0; min-height: 0; }

.bar {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 56px;
  padding: 8px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}
.bar strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.who { flex: 1; min-width: 0; display: flex; flex-direction: column; }

.dot { flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--muted); }
.dot.on { background: var(--good); }

.users { flex: 1; overflow-y: auto; list-style: none; margin: 0; padding: 6px; }
.users button {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 0;
  background: transparent;
  border-radius: 8px;
  padding: 10px;
  text-align: left;
  cursor: pointer;
}
.users button:hover { background: var(--bg); }
.users button.active { background: var(--bubble); }
.users .name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.users .tag { font-size: 0.75rem; color: var(--muted); }
.badge {
  min-width: 20px;
  padding: 0 6px;
  border-radius: 10px;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.75rem;
  line-height: 20px;
  text-align: center;
}

.foot { display: grid; gap: 10px; padding: 12px 16px; border-top: 1px solid var(--line); }
.foot label { display: grid; gap: 6px; font-size: 0.85rem; color: var(--muted); }
.foot select { color: var(--text); font-size: 0.95rem; }

.empty { flex: 1; display: grid; place-items: center; padding: 16px; text-align: center; }
.chat { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.back { display: none; padding: 6px 10px; }

.msgs { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 6px; padding: 16px; }
.msg {
  max-width: min(75%, 560px);
  padding: 8px 12px;
  border-radius: 14px;
  background: var(--bubble);
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  align-self: flex-start;
}
.msg.out { align-self: flex-end; background: var(--accent); color: var(--on-accent); }
.msg .meta { display: block; margin-top: 2px; font-size: 0.7rem; opacity: 0.75; text-align: right; }
.msg.failed { background: transparent; border: 1px dashed var(--bad); color: var(--text); }
.sys { align-self: center; font-size: 0.8rem; color: var(--muted); }

.send { display: flex; gap: 8px; padding: 10px 16px; background: var(--surface); border-top: 1px solid var(--line); }
.send input { flex: 1; min-width: 0; }

.toast {
  position: fixed;
  left: 50%;
  bottom: 84px;
  transform: translateX(-50%);
  max-width: calc(100% - 32px);
  padding: 10px 16px;
  border-radius: 10px;
  background: var(--text);
  color: var(--bg);
  font-size: 0.9rem;
}

@media (max-width: 700px) {
  .app { grid-template-columns: 1fr; }
  .app .pane { display: none; }
  .app.in-chat .side { display: none; }
  .app.in-chat .pane { display: flex; }
  .side { border-right: 0; }
  .back { display: inline-block; }
  .bar { padding: 8px 12px; }
  .send { padding: 10px 12px; }
}