/* ── Chat Widget ── */
.chat-trigger {
  position: fixed; bottom: 20px; right: 20px;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--brand); color: white;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; z-index: 100;
  box-shadow: var(--shadow); border: none;
  transition: transform .15s, box-shadow .15s;
}
.chat-trigger:hover { transform: scale(1.08); box-shadow: var(--shadow-lg); }
.chat-trigger svg { width: 26px; height: 26px; }
.chat-badge {
  position: absolute; top: -4px; right: -4px;
  min-width: 22px; height: 22px; border-radius: 11px;
  background: var(--rose); color: white;
  font-size: 11px; font-weight: 700;
  display: none; align-items: center; justify-content: center;
  padding: 0 6px;
}
.chat-badge.visible { display: flex; }

.chat-window {
  position: fixed; bottom: 84px; right: 20px;
  width: 520px; height: 480px;
  background: var(--surface); border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-lg); z-index: 100;
  display: none; flex-direction: row;
  font-size: 13px;
}
.chat-window.open { display: flex; }

.chat-sidebar {
  width: 180px; border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  background: var(--bg-alt);
}
.chat-sidebar-header {
  padding: 10px; border-bottom: 1px solid var(--border);
  display: flex; gap: 6px;
}
.chat-sidebar-header input {
  flex: 1; min-width: 0; background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 6px 10px; color: var(--text);
  font-size: 11px;
}
.chat-sidebar-header input:focus { border-color: var(--brand); }
.chat-new-btn {
  flex-shrink: 0; background: var(--brand-dim); color: var(--brand-light);
  border: none; border-radius: 6px; padding: 0 10px;
  font-size: 16px; font-weight: 700; cursor: pointer;
  min-width: 32px; min-height: 32px;
  display: flex; align-items: center; justify-content: center;
}
.chat-new-btn:hover { background: var(--brand); color: white; }
.chat-conv-list { flex: 1; overflow-y: auto; }
.chat-conv-item {
  padding: 10px 12px; display: flex; align-items: center; gap: 8px;
  cursor: pointer; border-bottom: 1px solid rgba(255,255,255,.03);
}
.chat-conv-item:hover { background: var(--surface-hover); }
.chat-conv-item.active { background: var(--surface-alt); border-left: 2px solid var(--brand); }
.chat-conv-avatar {
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 600; flex-shrink: 0; color: white;
}
.chat-conv-info { overflow: hidden; flex: 1; }
.chat-conv-name { font-weight: 600; font-size: 12px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--text); }
.chat-conv-preview { font-size: 11px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-conv-time { font-size: 10px; color: var(--text-muted); flex-shrink: 0; }

.chat-panel { flex: 1; display: flex; flex-direction: column; }
.chat-panel-header {
  padding: 10px 14px; background: var(--surface-alt);
  display: flex; align-items: center; gap: 8px;
  border-bottom: 1px solid var(--border);
}
.chat-panel-name { font-weight: 600; font-size: 13px; color: var(--text); }
.chat-panel-status { font-size: 10px; color: var(--green); }
.chat-panel-close {
  margin-left: auto; background: none; border: none;
  color: var(--text-muted); font-size: 16px; cursor: pointer; padding: 4px;
}
.chat-panel-close:hover { color: var(--text); }

.chat-messages {
  flex: 1; overflow-y: auto; padding: 12px 14px;
  display: flex; flex-direction: column; gap: 4px;
}
.chat-msg-bubble {
  max-width: 80%; padding: 8px 12px;
  border-radius: 12px; font-size: 12px; line-height: 1.5;
  word-wrap: break-word;
}
.chat-msg-bubble.sent {
  align-self: flex-end; background: var(--brand); color: white;
  border-bottom-right-radius: 4px;
}
.chat-msg-bubble.received {
  align-self: flex-start; background: var(--surface-alt); color: var(--text-secondary);
  border-bottom-left-radius: 4px;
}
.chat-msg-time {
  font-size: 9px; color: var(--text-muted); margin-top: 1px;
}
.chat-msg-time.sent { align-self: flex-end; padding-right: 4px; }
.chat-msg-time.received { align-self: flex-start; padding-left: 4px; }
.chat-typing { font-size: 11px; color: var(--teal); padding: 4px 0; }

.chat-input-area {
  padding: 10px 12px; border-top: 1px solid var(--border);
  display: flex; gap: 8px;
}
.chat-input {
  flex: 1; background: var(--bg); border: 1px solid var(--border);
  border-radius: 20px; padding: 8px 14px; color: var(--text);
  font-size: 12px; font-family: var(--sans); resize: none;
}
.chat-input:focus { border-color: var(--brand); outline: none; }
.chat-send-btn {
  background: var(--brand); color: white; border: none; border-radius: 50%;
  width: 34px; height: 34px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.chat-send-btn:disabled { opacity: .4; cursor: default; }
.chat-send-btn:hover:not(:disabled) { background: var(--brand-light); }

.chat-empty {
  flex: 1; display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 12px;
}

.chat-user-picker { flex: 1; overflow-y: auto; padding: 8px; }
.chat-user-item {
  padding: 8px 12px; display: flex; align-items: center; gap: 8px;
  cursor: pointer; border-radius: var(--radius);
}
.chat-user-item:hover { background: var(--surface-hover); }