/* ==========================================================================
   MESSENGER / CHAT
   ========================================================================== */
.messenger-container { display: flex; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); height: calc(100vh - 210px); min-height: 480px; max-height: 750px; overflow: hidden; }
.messenger-sidebar { width: 300px; border-right: 1px solid var(--border); display: flex; flex-direction: column; background: var(--surface); flex-shrink: 0; min-height: 0; height: 100%; overflow: hidden; }
.messenger-sidebar-header { padding: 0.9rem 1.1rem; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; flex-shrink: 0; }
.messenger-title { font-size: 1rem; font-weight: 800; color: var(--text); }
.conversations-list { flex: 1; overflow-y: auto; padding: 0.35rem 0; min-height: 0; }
.messenger-empty-threads { text-align: center; color: var(--text-muted); padding: 2.5rem 1rem; font-size: 0.86rem; }
.thread-item { display: flex; align-items: center; gap: 0.7rem; padding: 0.7rem 1.1rem; cursor: pointer; transition: background 0.12s; user-select: none; }
.thread-item:hover { background: var(--surface-hover); }
.thread-item.active { background: var(--primary-light); }
.thread-avatar { width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--border); object-fit: cover; flex-shrink: 0; }
.thread-info { flex: 1; min-width: 0; }
.thread-top { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 2px; }
.thread-name { font-size: 0.9rem; font-weight: 700; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.thread-time { font-size: 0.7rem; color: var(--text-subtle); flex-shrink: 0; }
.thread-preview { font-size: 0.78rem; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.thread-unread-badge { background: var(--primary); color: #fff; font-size: 0.68rem; font-weight: 800; min-width: 17px; height: 17px; line-height: 17px; border-radius: 999px; text-align: center; padding: 0 3px; }
.messenger-chat-area { flex: 1; display: flex; flex-direction: column; background: var(--bg); min-width: 0; min-height: 0; height: 100%; overflow: hidden; }
.messenger-empty-state { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 2rem; }
.messenger-empty-icon { width: 68px; height: 68px; border-radius: 50%; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; margin-bottom: 1rem; }
.messenger-active-chat { display: flex; flex-direction: column; flex: 1; min-height: 0; height: 100%; overflow: hidden; }
.messenger-chat-header { padding: 0.65rem 0.9rem; background: var(--surface); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; flex-shrink: 0; min-width: 0; }
.messenger-header-user { display: flex; align-items: center; gap: 0.55rem; min-width: 0; flex: 1; overflow: hidden; }
.messenger-header-user > div { min-width: 0; overflow: hidden; display: flex; flex-direction: column; }
.chat-back-btn { display: none; background: var(--surface-hover); border: 1px solid var(--border); color: var(--text); cursor: pointer; padding: 5px; border-radius: var(--radius-sm); flex-shrink: 0; align-items: center; justify-content: center; width: 32px; height: 32px; transition: all 0.15s; }
.chat-back-btn:hover { color: var(--primary); background: var(--primary-light); border-color: var(--border-strong); }
.chat-header-avatar { width: 38px; height: 38px; border-radius: 50%; border: 1.5px solid var(--border); object-fit: cover; flex-shrink: 0; }
.chat-header-name { font-size: 0.92rem; font-weight: 800; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.chat-header-status { font-size: 0.72rem; color: var(--emerald); font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.messenger-header-actions { display: flex; gap: 0.35rem; align-items: center; flex-shrink: 0; }
.messenger-messages-body { flex: 1; padding: 1.1rem; overflow-y: auto; display: flex; flex-direction: column; gap: 0.6rem; min-height: 0; }
.chat-bubble-row { display: flex; flex-direction: column; max-width: 74%; }
.chat-bubble-row.mine { align-self: flex-end; align-items: flex-end; }
.chat-bubble-row.theirs { align-self: flex-start; align-items: flex-start; }
.chat-bubble { padding: 0.55rem 0.85rem; border-radius: 15px; font-size: 0.86rem; line-height: 1.4; word-break: break-word; }
.chat-bubble-row.mine .chat-bubble { background: var(--primary); color: #fff; border-bottom-right-radius: 4px; }
.chat-bubble-row.theirs .chat-bubble { background: var(--surface); color: var(--text); border: 1px solid var(--border); border-bottom-left-radius: 4px; }
.chat-bubble-meta { display: flex; align-items: center; gap: 0.35rem; margin-top: 2px; font-size: 0.67rem; color: var(--text-subtle); padding: 0 3px; }
.chat-del-btn { background: none; border: none; color: var(--text-subtle); cursor: pointer; padding: 1px 3px; border-radius: 4px; font-size: 0.67rem; opacity: 0.7; transition: opacity 0.12s, color 0.12s; }
.chat-del-btn:hover { opacity: 1; color: var(--red); }
.messenger-input-form { padding: 0.7rem 1.1rem; background: var(--surface); border-top: 1px solid var(--border); display: flex; gap: 0.45rem; align-items: center; flex-shrink: 0; }
.messenger-input { flex: 1; background: var(--surface-hover); border: 1px solid var(--border); border-radius: var(--radius-full); padding: 0.6rem 1rem; font-size: 0.88rem; font-family: inherit; color: var(--text); outline: none; transition: border-color 0.15s; }
.messenger-input:focus { border-color: var(--primary); background: #fff; }
.messenger-send-btn { width: 38px; height: 38px; border-radius: 50%; background: var(--primary); color: #fff; border: none; display: flex; align-items: center; justify-content: center; cursor: pointer; flex-shrink: 0; transition: background 0.15s, transform 0.1s; }
.messenger-send-btn:hover { background: var(--primary-hover); transform: scale(1.06); }