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768px){.app-layout{flex-direction:column;height:100dvh}.sidebar{display:none}.app-content{flex:1;min-height:0;padding-bottom:60px}.mobile-bottom-nav{position:fixed;bottom:0;left:0;right:0;height:60px;background:var(--bg-secondary);border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-around;z-index:200;padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom-nav .sidebar-link{width:auto;height:auto;flex:1;flex-direction:column;gap:2px;padding:6px 0;border-radius:8px;font-size:20px}.mobile-bottom-nav .sidebar-label{font-size:10px;display:block}.chat-layout{flex-direction:column;height:100%}.conv-list{width:100%;min-width:0;border-right:none;border-bottom:none;height:100%}.chat-layout.has-active-chat .conv-list{display:none}.chat-layout.has-active-chat .chat-window{display:flex;height:100%}.chat-layout:not(.has-active-chat) .chat-window{display:none}.chat-window{width:100%;min-width:0;height:100%}.chat-header{padding:10px 12px}.msg-row{padding:2px 8px}.msg-bubble{max-width:85%}.sc-composer{padding:8px}.sc-composer__row{gap:6px}.conv-list-header{padding:12px}.conv-list-header h2{font-size:18px}.status-page,.contacts-page,.settings-page,.devices-page,.meetings-page{width:100%;max-width:100%}.ncm{width:100vw;border-radius:20px 20px 0 0;margin-top:auto;max-height:90dvh}.ncm-overlay{align-items:flex-end}.zm-controls{padding:8px 4px;gap:4px}.zm-ctrl-group{min-width:44px}.zm-ctrl-btn{width:44px;height:44px}.zm-ctrl-icon{font-size:18px}.zm-ctrl-label{font-size:9px}.zm-chat-panel{width:100%;border-left:none}.incoming-call-banner{left:0;right:0;border-radius:0 0 16px 16px;margin:0}}@supports (padding-bottom: env(safe-area-inset-bottom)){.sc-composer{padding-bottom:calc(8px + env(safe-area-inset-bottom))}}.mobile-back-btn{display:none;background:none;border:none;color:var(--accent);font-size:28px;line-height:1;padding:0 8px 0 0;cursor:pointer;flex-shrink:0}@media (max-width: 768px){.mobile-back-btn{display:block}}.pwa-install-banner{position:fixed;top:0;left:0;right:0;z-index:9000;background:linear-gradient(135deg,#1a56a0,#1e3a5f);color:#fff;display:flex;align-items:center;gap:12px;padding:10px 16px;padding-top:calc(10px + env(safe-area-inset-top));box-shadow:0 2px 12px #0000004d;animation:slide-down .3s ease}@keyframes slide-down{0%{transform:translateY(-100%)}to{transform:translateY(0)}}.pwa-install-icon{font-size:28px;flex-shrink:0}.pwa-install-text{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}.pwa-install-text strong{font-size:14px;font-weight:700}.pwa-install-text span{font-size:12px;opacity:.85}.pwa-install-btn{background:#fff;color:#1a56a0;border:none;border-radius:20px;padding:6px 16px;font-size:13px;font-weight:700;cursor:pointer;flex-shrink:0;transition:opacity .15s}.pwa-install-btn:hover{opacity:.9}.pwa-install-dismiss{background:none;border:none;color:#ffffffb3;font-size:18px;cursor:pointer;padding:4px;flex-shrink:0}.app-layout:has(.pwa-install-banner~*){padding-top:0}