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auto;transform:translate(100%)}.sidebar.open{transform:translate(0)}.sidebar-toggle{display:inline-flex}.shell-backdrop.open{display:block}.shell-content{padding:var(--space-4)}.dashboard-grid-2col{grid-template-columns:1fr!important}}@media (width<=640px){.shell-header{padding:0 var(--space-4)}.page-header{flex-direction:column;align-items:stretch}}.conv-shell{height:calc(100vh - var(--header-height) - var(--space-6) * 2);border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);box-shadow:var(--shadow-1);grid-template-columns:300px 1fr 280px;display:grid;overflow:hidden}.conv-list{border-right:1px solid var(--color-border);flex-direction:column;min-width:0;display:flex}[dir=rtl] .conv-list{border-right:none;border-left:1px solid var(--color-border)}.conv-list-header{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border)}.conv-list-items{flex:1;overflow-y:auto}.conv-list-item{gap:var(--space-3);padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border);cursor:pointer;align-items:flex-start;display:flex}.conv-list-item:hover{background:var(--color-bg)}.conv-list-item.active{background:var(--color-info-bg)}.conv-avatar{border-radius:var(--radius-full);background:var(--color-bg);width:38px;height:38px;color:var(--color-text-secondary);font-weight:700;font-size:var(--text-base);flex-shrink:0;justify-content:center;align-items:center;display:flex}.conv-list-meta{flex:1;min-width:0}.conv-list-top-row{justify-content:space-between;gap:var(--space-2);display:flex}.conv-list-name{font-weight:600;font-size:var(--text-base);white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.conv-list-time{font-size:var(--text-xs);color:var(--color-text-muted);flex-shrink:0}.conv-list-preview{font-size:var(--text-sm);color:var(--color-text-secondary);white-space:nowrap;text-overflow:ellipsis;margin-top:2px;overflow:hidden}.conv-unread-dot{background:var(--color-accent);border-radius:50%;flex-shrink:0;width:9px;height:9px;margin-top:4px}.conv-thread{border-right:1px solid var(--color-border);flex-direction:column;min-width:0;display:flex}[dir=rtl] .conv-thread{border-right:none;border-left:1px solid var(--color-border)}.conv-thread-header{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border);justify-content:space-between;align-items:center;gap:var(--space-3);display:flex}.conv-thread-messages{padding:var(--space-4);gap:var(--space-2);flex-direction:column;flex:1;display:flex;overflow-y:auto}.conv-bubble{max-width:68%;padding:var(--space-2) var(--space-3);border-radius:var(--radius-md);font-size:var(--text-base);line-height:var(--line-normal)}.conv-bubble-in{background:var(--color-bg);color:var(--color-text-primary);border-bottom-left-radius:2px;align-self:flex-start}[dir=rtl] .conv-bubble-in{border-bottom-left-radius:var(--radius-md);border-bottom-right-radius:2px}.conv-bubble-out{background:var(--color-accent);color:#fff;border-bottom-right-radius:2px;align-self:flex-end}[dir=rtl] .conv-bubble-out{border-bottom-right-radius:var(--radius-md);border-bottom-left-radius:2px;align-self:flex-start}.conv-bubble-meta{opacity:.7;justify-content:flex-end;align-items:center;gap:4px;margin-top:3px;font-size:10.5px;display:flex}.conv-composer{border-top:1px solid var(--color-border);padding:var(--space-3) var(--space-4);gap:var(--space-2);align-items:flex-end;display:flex}.conv-composer textarea{min-height:42px;max-height:120px}.conv-panel{padding:var(--space-4);overflow-y:auto}.conv-panel h4{font-size:var(--text-xs);text-transform:uppercase;letter-spacing:.04em;color:var(--color-text-muted);margin:var(--space-4) 0 var(--space-2)}.conv-panel h4:first-child{margin-top:0}.conv-note{background:var(--color-bg);border-radius:var(--radius-md);padding:var(--space-2) var(--space-3);font-size:var(--text-sm);margin-bottom:var(--space-2)}.conv-note-meta{font-size:var(--text-xs);color:var(--color-text-muted);margin-top:4px}.conv-back-btn{display:none}@media (width<=1024px){.conv-shell{height:calc(100vh - var(--header-height));margin:calc(-1 * var(--space-4));border:none;border-radius:0;grid-template-columns:1fr}.conv-list,.conv-thread,.conv-panel{display:none}.conv-shell[data-mobile-view=list] .conv-list,.conv-shell[data-mobile-view=thread] .conv-thread{display:flex}.conv-shell[data-mobile-view=contact] .conv-panel{display:block}.conv-back-btn{display:inline-flex}}