:root {
  --bg: #0b141a;
  --panel: #111b21;
  --panel-2: #202c33;
  --hover: #2a3942;
  --in: #202c33;
  --out: #005c4b;
  --txt: #e9edef;
  --muted: #8696a0;
  --accent: #00a884;
  --tick: #53bdeb;
  --badge: #00a884;
  --divider: #222d34;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--txt);
}
.hidden { display: none !important; }

/* --- Экран входа --- */
.login {
  height: 100%; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(160deg, #0b141a, #111b21);
}
.login-card {
  background: var(--panel); padding: 40px; border-radius: 16px; text-align: center;
  box-shadow: 0 12px 40px rgba(0,0,0,.5); width: 360px;
}
.login-logo { font-size: 56px; }
.login-card h1 { margin: 8px 0 4px; font-size: 24px; }
.login-card p { color: var(--muted); margin: 0 0 24px; font-size: 14px; }
.login-users { display: flex; flex-direction: column; gap: 10px; }
.login-user {
  display: flex; align-items: center; gap: 12px; padding: 10px 14px;
  background: var(--panel-2); border-radius: 10px; cursor: pointer; transition: background .15s;
}
.login-user:hover { background: var(--hover); }
.login-user .avatar { width: 42px; height: 42px; font-size: 22px; }
.login-user .lu-name { font-weight: 600; }
.login-user .lu-about { font-size: 12px; color: var(--muted); }

/* --- Каркас приложения --- */
.app { height: 100%; display: flex; }
.sidebar {
  width: 380px; min-width: 300px; background: var(--panel);
  display: flex; flex-direction: column; border-right: 1px solid var(--divider);
}
.chat { flex: 1; display: flex; background: #0b141a; position: relative; }

/* --- Сайдбар --- */
.sidebar-head {
  display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: var(--panel-2);
}
.me-name { font-weight: 600; flex: 1; }
.icon-btn {
  background: transparent; border: 0; color: var(--muted); font-size: 18px; cursor: pointer;
  padding: 6px 10px; border-radius: 8px;
}
.icon-btn:hover { background: var(--hover); color: var(--txt); }
.search { padding: 8px 12px; }
.search input {
  width: 100%; background: var(--panel-2); border: 0; color: var(--txt);
  padding: 9px 14px; border-radius: 8px; font-size: 14px;
}
.search input::placeholder { color: var(--muted); }

.chat-list { flex: 1; overflow-y: auto; }
.chat-row {
  display: flex; align-items: center; gap: 12px; padding: 10px 16px; cursor: pointer;
  border-bottom: 1px solid var(--divider); transition: background .12s;
}
.chat-row:hover { background: var(--panel-2); }
.chat-row.active { background: var(--hover); }
.chat-row .body { flex: 1; min-width: 0; }
.chat-row .top { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.chat-row .title { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-row .time { font-size: 12px; color: var(--muted); flex-shrink: 0; }
.chat-row .bottom { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-top: 2px; }
.chat-row .preview { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; }
.chat-row .badge {
  background: var(--badge); color: #0b141a; font-size: 12px; font-weight: 700;
  min-width: 20px; height: 20px; border-radius: 10px; display: flex; align-items: center;
  justify-content: center; padding: 0 6px;
}

/* --- Аватары --- */
.avatar {
  width: 48px; height: 48px; border-radius: 50%; background: var(--panel-2);
  display: flex; align-items: center; justify-content: center; font-size: 24px; flex-shrink: 0;
  position: relative;
}
.avatar.online::after {
  content: ""; position: absolute; right: 1px; bottom: 1px; width: 12px; height: 12px;
  background: var(--accent); border: 2px solid var(--panel); border-radius: 50%;
}

/* --- Панель чата --- */
.empty {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: var(--muted); gap: 12px;
}
.empty-logo { font-size: 64px; opacity: .5; }
.chat-inner { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.chat-head {
  display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--panel-2);
}
.chat-head .avatar { width: 40px; height: 40px; font-size: 20px; }
.enc-toggle { margin-left: auto; font-size: 18px; }
.enc-toggle.on { color: var(--accent); }
.chat-head-title { font-weight: 600; }
.chat-head-sub { font-size: 13px; color: var(--muted); min-height: 16px; }
.chat-head-sub.typing { color: var(--accent); }

.messages {
  flex: 1; overflow-y: auto; padding: 16px 8%;
  display: flex; flex-direction: column; gap: 2px;
  background-image: linear-gradient(rgba(11,20,26,.95), rgba(11,20,26,.95));
}
.day-sep { align-self: center; background: var(--panel-2); color: var(--muted);
  font-size: 12px; padding: 4px 12px; border-radius: 8px; margin: 12px 0; }
.bubble {
  max-width: 65%; padding: 6px 9px 8px; border-radius: 8px; background: var(--in);
  align-self: flex-start; position: relative; font-size: 14.5px; line-height: 1.35;
  box-shadow: 0 1px 1px rgba(0,0,0,.2);
}
.bubble.out { align-self: flex-end; background: var(--out); }
.bubble .sender { font-size: 12.5px; font-weight: 600; color: var(--tick); margin-bottom: 2px; }
.bubble .reply {
  border-left: 3px solid var(--accent); background: rgba(0,0,0,.18); padding: 4px 8px;
  border-radius: 4px; margin-bottom: 4px; font-size: 13px; color: var(--muted);
}
.bubble .text { white-space: pre-wrap; word-wrap: break-word; }
.bubble .meta { float: right; margin: 4px 0 -2px 8px; font-size: 11px; color: var(--muted);
  display: flex; align-items: center; gap: 3px; }
.bubble.out .meta { color: rgba(233,237,239,.6); }
.tick { font-size: 13px; }
.tick.read { color: var(--tick); }
.bubble.system { align-self: center; background: var(--panel-2); color: var(--muted); font-size: 13px; }

/* --- Композер --- */
.composer { display: flex; gap: 8px; padding: 12px 16px; background: var(--panel-2); align-items: center; }
.composer input {
  flex: 1; background: var(--panel); border: 0; color: var(--txt); padding: 11px 16px;
  border-radius: 22px; font-size: 14.5px;
}
.composer input::placeholder { color: var(--muted); }
.send-btn {
  background: var(--accent); border: 0; color: #fff; width: 44px; height: 44px;
  border-radius: 50%; cursor: pointer; font-size: 18px; flex-shrink: 0;
}
.send-btn:hover { filter: brightness(1.08); }
.attach-btn {
  background: transparent; border: 0; color: var(--muted); font-size: 22px;
  cursor: pointer; flex-shrink: 0; padding: 4px 6px;
}
.attach-btn:hover { color: var(--txt); }

/* Вложения в пузырях */
.bubble img.att-img {
  max-width: 100%; max-height: 320px; border-radius: 6px; display: block;
  margin-bottom: 4px; cursor: pointer;
}
.att-file {
  display: flex; align-items: center; gap: 10px; padding: 8px 10px;
  background: rgba(0,0,0,.2); border-radius: 6px; margin-bottom: 4px;
  text-decoration: none; color: inherit;
}
.att-file .att-icon { font-size: 28px; }
.att-file .att-name { font-size: 14px; font-weight: 600; word-break: break-all; }
.att-file .att-size { font-size: 12px; color: var(--muted); }
.upload-pending { font-size: 13px; color: var(--muted); padding: 6px 16px; background: var(--panel-2); }
.readonly { padding: 16px; text-align: center; color: var(--muted); background: var(--panel-2); font-size: 14px; }

/* Панель цитирования над композером */
.reply-bar {
  display: flex; align-items: center; gap: 8px; padding: 8px 16px;
  background: var(--panel-2); border-top: 2px solid var(--accent);
}
.reply-bar-body { flex: 1; min-width: 0; border-left: 3px solid var(--accent); padding-left: 10px; }
.reply-bar-name { font-size: 13px; font-weight: 600; color: var(--accent); }
.reply-bar-text { font-size: 13px; color: var(--muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* Кликабельные пузыри (для ответа) */
.bubble { cursor: pointer; }
.bubble .reply { cursor: pointer; }

/* Модалка создания чата */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex;
  align-items: center; justify-content: center; z-index: 100; }
.modal-card { background: var(--panel); width: 380px; max-width: calc(100vw - 32px);
  max-height: 80vh; border-radius: 14px; padding: 18px; display: flex; flex-direction: column;
  gap: 12px; box-shadow: 0 16px 48px rgba(0,0,0,.5); }
.modal-head { display: flex; justify-content: space-between; align-items: center;
  font-weight: 600; font-size: 17px; }
.seg { display: flex; background: var(--panel-2); border-radius: 9px; padding: 3px; }
.seg button { flex: 1; background: transparent; border: 0; color: var(--muted);
  padding: 8px; border-radius: 7px; cursor: pointer; font-size: 14px; }
.seg button.active { background: var(--accent); color: #fff; }
.modal-input { background: var(--panel-2); border: 0; color: var(--txt); padding: 10px 12px;
  border-radius: 8px; font-size: 14px; }
.modal-input::placeholder { color: var(--muted); }
.modal-hint { font-size: 13px; color: var(--muted); }
.modal-users { overflow-y: auto; display: flex; flex-direction: column; gap: 4px; max-height: 320px; }
.modal-user { display: flex; align-items: center; gap: 10px; padding: 8px 10px;
  border-radius: 8px; cursor: pointer; }
.modal-user:hover { background: var(--panel-2); }
.modal-user.selected { background: var(--hover); }
.modal-user .avatar { width: 38px; height: 38px; font-size: 19px; }
.modal-user .mu-name { font-weight: 600; }
.modal-user .mu-about { font-size: 12px; color: var(--muted); }
.modal-user .check { margin-left: auto; color: var(--accent); font-size: 18px; visibility: hidden; }
.modal-user.selected .check { visibility: visible; }
.modal-create { background: var(--accent); color: #fff; border: 0; padding: 11px;
  border-radius: 9px; font-size: 15px; cursor: pointer; }
.modal-create:hover { filter: brightness(1.08); }
.modal-leave { background: transparent; color: #f15c6d; border: 1px solid #f15c6d;
  padding: 10px; border-radius: 9px; font-size: 14px; cursor: pointer; }
.modal-leave:hover { background: rgba(241,92,109,.12); }
.member-row { display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 8px; }
.member-row:hover { background: var(--panel-2); }
.member-row .mu-name { font-weight: 600; }
.member-role { font-size: 12px; color: var(--muted); margin-left: auto; }
.member-remove { background: transparent; border: 0; color: #f15c6d; font-size: 16px;
  cursor: pointer; margin-left: 8px; }
.chat-head-info { cursor: default; }
.chat-head-info.clickable { cursor: pointer; }
.chat-head-info.clickable:hover .chat-head-title { text-decoration: underline; }

/* Скроллбары */
::-webkit-scrollbar { width: 7px; }
::-webkit-scrollbar-thumb { background: #2a3942; border-radius: 4px; }

/* Кнопка «назад» — только в узком режиме (мобайл/виджет) */
.back-btn { display: none; font-size: 26px; line-height: 1; padding: 2px 10px; }

@media (max-width: 680px) {
  .sidebar { width: 100%; }
  .app.in-chat .sidebar { display: none; }
  .app:not(.in-chat) .chat { display: none; }
  .back-btn { display: block; }
}