:root {
  --bg: #0e1621;
  --panel: #17212b;
  --panel-2: #1e2c3a;
  --border: #24313d;
  --text: #e8eef4;
  --muted: #7f92a6;
  --accent: #4ea4f5;
  --out: #2b5278;
  --in: #1e2c3a;
  --danger: #e5624a;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 -apple-system, "Segoe UI", Roboto, sans-serif;
}

.hidden { display: none !important; }
.screen { height: 100%; }
.muted { color: var(--muted); }
.error { color: var(--danger); min-height: 20px; margin: 4px 0 0; font-size: 13px; }

button {
  font: inherit;
  cursor: pointer;
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  background: var(--accent);
  color: #fff;
}
button:disabled { opacity: .5; cursor: default; }
button.ghost {
  background: transparent;
  color: var(--muted);
  padding: 6px 10px;
  font-size: 17px;
}
button.ghost:hover { color: var(--text); }
button.small { padding: 5px 10px; font-size: 13px; border-radius: 8px; }
button.danger { background: var(--danger); }

input, textarea {
  font: inherit;
  color: var(--text);
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  outline: none;
}
input:focus, textarea:focus { border-color: var(--accent); }

/* --- login --- */
.login-screen { display: flex; align-items: center; justify-content: center; }
.login-card {
  width: min(340px, 90vw);
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.login-card h1 { margin: 0 0 6px; font-size: 22px; }

/* --- layout --- */
.app-screen { display: flex; }
.sidebar {
  width: 320px;
  flex: none;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.who { display: flex; flex-direction: column; overflow: hidden; }
.who strong { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.role { font-size: 12px; color: var(--muted); }
.head-actions { display: flex; flex: none; }
.search { margin: 10px; }
.chat-list { flex: 1; overflow-y: auto; }

.chat-item {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.chat-item:hover { background: var(--panel-2); }
.chat-item.active { background: var(--out); }
.chat-item .row { display: flex; justify-content: space-between; gap: 8px; }
.chat-item .name { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-item .time { font-size: 11px; color: var(--muted); flex: none; }
.chat-item .preview {
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.badge-ro { font-size: 10px; color: var(--muted); border: 1px solid var(--border); border-radius: 6px; padding: 0 4px; }

.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.empty { flex: 1; display: grid; place-items: center; color: var(--muted); }

.chat-view, .admin-view { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.chat-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.chat-head-text { display: flex; flex-direction: column; min-width: 0; }
.chat-head .sub { font-size: 12px; color: var(--muted); }
.back { display: none; }

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.msg { max-width: min(620px, 78%); padding: 8px 12px; border-radius: 14px; background: var(--in); align-self: flex-start; }
.msg.out { background: var(--out); align-self: flex-end; }
.msg .from { font-size: 12px; color: var(--accent); margin-bottom: 2px; }
.msg .text { white-space: pre-wrap; word-wrap: break-word; }
.msg .meta { font-size: 11px; color: var(--muted); text-align: right; margin-top: 3px; }
.msg .via { color: var(--accent); }
.msg img, .msg video { max-width: 100%; border-radius: 10px; display: block; margin-top: 4px; }
.load-more { align-self: center; background: var(--panel-2); color: var(--muted); }

.composer {
  display: flex;
  gap: 8px;
  padding: 10px 14px;
  background: var(--panel);
  border-top: 1px solid var(--border);
}
.composer textarea { flex: 1; resize: none; max-height: 140px; }
.readonly-note {
  padding: 12px;
  text-align: center;
  color: var(--muted);
  background: var(--panel);
  border-top: 1px solid var(--border);
}

/* --- admin --- */
/* --- контекстне меню чату --- */
.ctx-menu {
  position: fixed;
  z-index: 100;
  min-width: 240px;
  max-height: 60vh;
  overflow-y: auto;
  padding: 6px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, .5);
}
.ctx-menu .ctx-head {
  padding: 6px 8px;
  font-size: 12px;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.ctx-user { display: flex; align-items: center; gap: 6px; padding: 6px 8px; border-radius: 8px; }
.ctx-user:hover { background: var(--panel-2); }
.ctx-user .grow { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }
.ctx-user button { padding: 3px 8px; font-size: 12px; border-radius: 7px; background: var(--panel-2); color: var(--muted); }
.ctx-user button.on { background: var(--accent); color: #fff; }
.ctx-empty { padding: 8px; font-size: 13px; color: var(--muted); }

.sync-status { font-size: 12px; color: var(--muted); flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.admin-body { flex: 1; min-height: 0; display: flex; gap: 16px; padding: 16px; overflow: hidden; }
.admin-col { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 10px; overflow: hidden; }
.admin-col h3 { margin: 0; font-size: 15px; }
.user-list, .grants-panel { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 6px; }
.user-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
}
.user-row.active { border-color: var(--accent); }
.user-row .grow { flex: 1; min-width: 0; }
.user-row .sub { font-size: 12px; color: var(--muted); }
.new-user { display: flex; gap: 6px; flex-wrap: wrap; }
.new-user input { flex: 1; min-width: 110px; }

.grant-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.grant-row .grow { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.grant-row label { font-size: 13px; color: var(--muted); display: flex; align-items: center; gap: 4px; }
.grant-add { display: flex; gap: 6px; }
.grant-add select { flex: 1; min-width: 0; background: var(--panel-2); color: var(--text); border: 1px solid var(--border); border-radius: 10px; padding: 9px; }

@media (max-width: 780px) {
  .sidebar { width: 100%; }
  .app-screen.chat-open .sidebar { display: none; }
  .app-screen:not(.chat-open) .main { display: none; }
  .back { display: block; }
  .msg { max-width: 88%; }
  .admin-body { flex-direction: column; overflow-y: auto; }
}