:root{--chat-bg: #f3f4f6;--sidebar-bg: #ffffff;--chat-header: #ffffff;--bubble-me: #2563eb;--bubble-other: #ffffff;--text-me: #ffffff;--text-other: #1f2937;--sidebar-w: 380px}.messaging-page{height:100vh;overflow:hidden;background-color:var(--chat-bg)}.chat-layout{display:flex;height:100vh;width:100%}.chat-sidebar{width:var(--sidebar-w);background:var(--sidebar-bg);border-right:1px solid #e5e7eb;display:flex;flex-direction:column}.sidebar-header{padding:1.5rem;border-bottom:1px solid #f3f4f6;display:flex;justify-content:space-between;align-items:center}.sidebar-header h2{font-size:1.5rem;font-weight:800;color:#0f172a}.sidebar-search{padding:1rem}.search-msg-input{width:100%;padding:.75rem 1rem;border:1px solid #f3f4f6;background:#f9fafb;border-radius:12px;font-size:.9rem}.conversations-list{flex:1;overflow-y:auto}.conv-item{display:flex;padding:1.25rem;cursor:pointer;transition:all .2s;border-bottom:1px solid #f9fafb;align-items:center;gap:1rem}.conv-item:hover{background-color:#f8fafc}.conv-item.active{background-color:#eff6ff;border-left:4px solid #2563eb}.conv-avatar{width:48px;height:48px;border-radius:50%;background:#e2e8f0;display:flex;align-items:center;justify-content:center;font-weight:700;color:#475569;flex-shrink:0}.conv-details{flex:1;min-width:0}.conv-header{display:flex;justify-content:space-between;margin-bottom:4px}.conv-name{font-weight:700;font-size:.95rem;color:#0f172a;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conv-date{font-size:.75rem;color:#94a3b8}.conv-last-msg{font-size:.85rem;color:#64748b;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-main{flex:1;display:flex;flex-direction:column;background:#f8fafc}.chat-header{height:72px;background:#fff;padding:0 2rem;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e5e7eb;z-index:10}.chat-header .user-info{display:flex;align-items:center;gap:12px}.chat-header .user-info h3{font-weight:700;font-size:1rem}.chat-messages{flex:1;overflow-y:auto;padding:2rem;display:flex;flex-direction:column;gap:1.5rem}.message-bubble{max-width:70%;padding:1rem 1.25rem;border-radius:18px;font-size:.95rem;line-height:1.5;position:relative}.message-bubble.me{align-self:flex-end;background:var(--bubble-me);color:var(--text-me);border-bottom-right-radius:4px}.message-bubble.other{align-self:flex-start;background:var(--bubble-other);color:var(--text-other);border-bottom-left-radius:4px;box-shadow:0 2px 5px #00000008}.message-time{display:block;font-size:.7rem;margin-top:6px;opacity:.7}.chat-footer{padding:1.5rem 2rem;background:#fff;border-top:1px solid #e5e7eb}.chat-form{display:flex;gap:1rem;align-items:center}.chat-input{flex:1;padding:.9rem 1.2rem;border:1px solid #e5e7eb;border-radius:50px;background:#f9fafb;outline:none;transition:all .3s}.chat-input:focus{border-color:#2563eb;background:#fff;box-shadow:0 0 0 4px #2563eb1a}.btn-send{background:#2563eb;color:#fff;border:none;width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all .3s}.btn-send:hover{background:#1d4ed8;transform:scale(1.1)}@media(max-width:850px){.chat-sidebar{width:100%;display:none}.chat-sidebar.active{display:flex}.chat-main{display:none}.chat-main.active{display:flex}}