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var(--duration-fast) var(--ease)}.scroll-to-bottom:hover{transform:translateY(-2px)}.scroll-to-bottom .chat-badge{position:absolute;top:-6px;right:-6px}.message-input{border-top:1px solid var(--color-border);background:var(--color-surface);padding:12px 24px;position:relative;transition:background var(--duration-fast) var(--ease)}.message-input.drag-over{background:var(--color-primary-soft)}.drag-overlay{position:absolute;top:6px;right:6px;bottom:6px;left:6px;border:2px dashed var(--color-primary);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:600;color:var(--color-primary-text);background:var(--color-primary-soft);pointer-events:none;z-index:2;animation:fade-in var(--duration-fast) var(--ease)}.reply-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--color-primary-soft);border-radius:var(--radius-sm);padding:7px 10px 7px 12px;margin-bottom:8px;border-left:3px solid var(--color-primary);animation:fade-in-up var(--duration-fast) var(--ease)}.reply-bar-info{min-width:0;display:flex;flex-direction:column;gap:0}.reply-bar-label{font-size:11.5px;font-weight:700;color:var(--color-primary-text)}.reply-bar-text{font-size:12.5px;color:var(--color-text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reply-bar button{background:transparent;border:none;color:var(--color-text-muted);font-size:13px;flex-shrink:0;width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center}.reply-bar button:hover{background:#0000000f}.file-preview{display:flex;align-items:center;gap:10px;background:var(--color-primary-soft);border-radius:var(--radius-sm);padding:6px 10px;margin-bottom:8px;font-size:13px;animation:fade-in-up var(--duration-fast) var(--ease)}.file-preview-thumb{width:32px;height:32px;border-radius:6px;object-fit:cover;flex-shrink:0}.file-preview-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-preview button{background:transparent;border:none;color:var(--color-text-muted);flex-shrink:0}.file-preview button:hover{color:var(--color-danger)}.message-input-row{display:flex;align-items:flex-end;gap:8px}.message-textarea{flex:1;padding:11px 16px;border-radius:20px;border:1.5px solid var(--color-border);background:var(--color-surface-alt);color:var(--color-text);font-size:14px;font-family:inherit;line-height:1.4;outline:none;resize:none;max-height:140px;transition:border-color var(--duration-fast) var(--ease),background-color var(--duration-fast) var(--ease)}.message-textarea:focus{border-color:var(--color-primary);background:var(--color-surface)}.send-button{border-radius:50%;width:42px;height:42px;min-width:42px;padding:0;display:flex;align-items:center;justify-content:center;font-size:16px}.send-button .spinner{animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0c0e1280;display:flex;align-items:center;justify-content:center;padding:20px;z-index:50;animation:fade-in var(--duration-fast) var(--ease)}.modal{width:100%;max-width:420px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:24px;display:flex;flex-direction:column;gap:14px;max-height:80vh;overflow-y:auto;animation:scale-in var(--duration-base) var(--ease)}.modal-header{display:flex;align-items:center;justify-content:space-between}.modal-header h2{margin:0;font-size:18px;font-weight:700}.avatar-editor{display:flex;align-items:center;gap:14px;margin-bottom:8px}.avatar-editor-actions{display:flex;flex-direction:column;align-items:flex-start;gap:6px}.modal-divider{height:1px;background:var(--color-border);margin:4px 0}.about-dev{background:var(--color-surface-alt);border-radius:var(--radius-md);padding:14px 16px}.about-dev h3{margin:0 0 6px;font-size:13px;font-weight:700;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.03em}.about-dev p{margin:0;font-size:13.5px;line-height:1.55;color:var(--color-text)}.about-dev-signature{margin-top:8px!important;font-style:italic;color:var(--color-text-muted)!important}.danger-outline{background:transparent;border:1px solid var(--color-danger);color:var(--color-danger);border-radius:var(--radius-sm);padding:10px;font-weight:600;font-size:13.5px;transition:background var(--duration-fast) var(--ease)}.danger-outline:hover{background:var(--color-danger-soft)}.contact-profile{display:flex;flex-direction:column;gap:16px}.contact-profile-header{display:flex;align-items:center;gap:14px}.avatar-lg{width:56px;height:56px;min-width:56px;font-size:18px}.contact-profile-name-row{display:flex;align-items:center;gap:6px}.contact-profile-name{font-weight:700;font-size:17px}.contact-profile-field{display:flex;flex-direction:column;gap:2px;font-size:14px;padding-top:10px;border-top:1px solid var(--color-border)}.contact-profile-field .muted{font-size:12px;text-transform:uppercase;letter-spacing:.04em}.user-pick-list{display:flex;flex-direction:column;gap:2px;overflow-y:auto;max-height:240px}.user-pick-item{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:var(--radius-sm);font-size:13px;transition:background var(--duration-fast) var(--ease)}.user-pick-item:hover{background:var(--color-surface-alt)}.selected-users{display:flex;flex-wrap:wrap;gap:6px}.selected-chip{display:flex;align-items:center;gap:6px;background:var(--color-primary-soft);color:var(--color-primary-text);border-radius:var(--radius-pill);padding:4px 6px 4px 12px;font-size:13px;font-weight:600}.selected-chip button{background:transparent;border:none;color:inherit;font-size:11px;width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center}.selected-chip button:hover{background:#00000014}.dropdown{position:relative}.dropdown-menu{position:absolute;top:calc(100% + 6px);right:0;min-width:190px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);box-shadow:var(--shadow-md);padding:6px;display:flex;flex-direction:column;gap:1px;z-index:30;animation:scale-in var(--duration-fast) var(--ease);transform-origin:top right}.dropdown-menu-left{right:auto;left:0;transform-origin:top left}.dropdown-item{display:flex;align-items:center;gap:10px;background:transparent;border:none;padding:8px 10px;border-radius:var(--radius-sm);font-size:13px;font-weight:500;color:var(--color-text);text-align:left;width:100%;transition:background var(--duration-fast) var(--ease)}.dropdown-item:hover{background:var(--color-surface-alt)}.dropdown-item.danger{color:var(--color-danger)}.dropdown-item.danger:hover{background:var(--color-danger-soft)}.dropdown-item-icon{width:16px;text-align:center;font-size:13px;flex-shrink:0}.dropdown-divider{height:1px;background:var(--color-border);margin:4px 2px}.toast-viewport{position:fixed;bottom:20px;right:20px;display:flex;flex-direction:column;gap:8px;z-index:100;max-width:340px}.toast{display:flex;align-items:center;gap:10px;background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-md);padding:12px 14px;box-shadow:var(--shadow-md);font-size:13px;font-weight:500;cursor:pointer;animation:fade-in-up var(--duration-base) var(--ease)}.toast-icon{width:20px;height:20px;min-width:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700}.toast-success .toast-icon{background:#16a34a26;color:var(--color-success)}.toast-error .toast-icon{background:var(--color-danger-soft);color:var(--color-danger)}.toast-info .toast-icon{background:var(--color-primary-soft);color:var(--color-primary-text)}.skeleton{background:linear-gradient(90deg,var(--color-surface-alt) 25%,var(--color-surface-hover) 50%,var(--color-surface-alt) 75%);background-size:200% 100%;animation:skeleton-shimmer 1.4s ease-in-out infinite;border-radius:var(--radius-sm)}.chat-list-skeleton-item{display:flex;align-items:center;gap:12px;padding:10px}.chat-list-skeleton-avatar{width:40px;height:40px;border-radius:50%;flex-shrink:0}.chat-list-skeleton-lines{flex:1;display:flex;flex-direction:column;gap:6px}.chat-list-skeleton-lines span{display:block;height:10px}@media (max-width: 860px){.sidebar-wrap{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40;transform:translate(-100%);transition:transform var(--duration-base) var(--ease)}.sidebar-wrap.open{transform:translate(0)}.sidebar{width:100%}.mobile-menu-button{display:flex}.chat-window-close{display:none}.message-bubble-wrap{max-width:85%}.scroll-to-bottom{right:16px;bottom:88px}.toast-viewport{left:12px;right:12px;bottom:12px;max-width:none}}.message-edit-box{display:flex;flex-direction:column;gap:6px;min-width:200px}.message-edit-input{width:100%;resize:vertical;border-radius:var(--radius-sm);border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-text);padding:8px 10px;font:inherit;font-size:14px}.message-row.own .message-edit-input{background:#ffffff1f;border-color:#ffffff4d;color:inherit}.message-edit-actions{display:flex;align-items:center;justify-content:flex-end;gap:10px}.message-edit-cancel{background:transparent;border:none;color:inherit;opacity:.75;font-size:12px;font-weight:600;padding:0}.message-edit-cancel:hover{opacity:1;text-decoration:underline}.primary.small{padding:6px 12px;font-size:12.5px}.message-edited-tag{font-style:italic;opacity:.8}.message-reactions{display:flex;flex-wrap:wrap;gap:4px;margin-top:4px}.reaction-pill{display:inline-flex;align-items:center;gap:4px;background:var(--color-surface-alt);border:1px solid var(--color-border);border-radius:var(--radius-pill);padding:2px 8px;font-size:12.5px;line-height:1.6;transition:background var(--duration-fast) var(--ease),border-color var(--duration-fast) var(--ease)}.reaction-pill:hover{background:var(--color-surface-hover)}.reaction-pill.mine{background:var(--color-primary-soft);border-color:var(--color-primary)}.reaction-count{font-weight:600;opacity:.85}.dropdown-menu:has(.emoji-picker){min-width:0}.emoji-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;padding:2px}.emoji-picker-item{background:transparent;border:none;font-size:19px;padding:6px;border-radius:var(--radius-sm);transition:background var(--duration-fast) var(--ease)}.emoji-picker-item:hover{background:var(--color-surface-alt)}.message-list-skeleton{display:flex;flex-direction:column;gap:14px;padding:8px 4px}.message-skeleton-row{display:flex}.message-skeleton-row.own{justify-content:flex-end}.message-skeleton-bubble{height:40px;border-radius:var(--radius-lg);background:linear-gradient(90deg,var(--color-surface-alt) 25%,var(--color-surface-hover) 50%,var(--color-surface-alt) 75%);background-size:200% 100%;animation:skeleton-shimmer 1.4s ease-in-out infinite}@keyframes skeleton-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.sidebar-skeleton-row{display:flex;align-items:center;gap:10px;padding:10px 16px}.sidebar-skeleton-avatar{width:44px;height:44px;border-radius:50%;flex-shrink:0;background:linear-gradient(90deg,var(--color-surface-alt) 25%,var(--color-surface-hover) 50%,var(--color-surface-alt) 75%);background-size:200% 100%;animation:skeleton-shimmer 1.4s ease-in-out infinite}.sidebar-skeleton-lines{flex:1;display:flex;flex-direction:column;gap:8px}.sidebar-skeleton-line{height:10px;border-radius:6px;background:linear-gradient(90deg,var(--color-surface-alt) 25%,var(--color-surface-hover) 50%,var(--color-surface-alt) 75%);background-size:200% 100%;animation:skeleton-shimmer 1.4s ease-in-out infinite}.sidebar-skeleton-line.short{width:55%}