.settings-modal{max-width:480px}.settings-section{margin-bottom:24px;padding-bottom:20px;border-bottom:1px solid var(--border-light, #eef2f7)}.settings-section:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.settings-section-title{font-size:12px;font-weight:600;color:var(--text-muted, #9aa5b8);text-transform:uppercase;letter-spacing:.5px;margin-bottom:12px;display:flex;align-items:center;gap:8px}.settings-item{display:flex;justify-content:space-between;align-items:center;padding:8px 0;gap:12px}.settings-item.toggle-item{padding:10px 0}.settings-label{font-size:14px;color:var(--text-primary, #1a2332);font-weight:500;flex:1}.settings-value{font-size:14px;color:var(--text-secondary, #5b6779)}.settings-input{padding:8px 12px;border:1.5px solid var(--border, #e3e8f0);border-radius:var(--r-sm, 6px);font-size:14px;width:180px;background:#fff;color:var(--text-primary, #1a2332);transition:border-color .2s}.settings-input:focus{border-color:var(--brand-primary, #007BFF);box-shadow:0 0 0 3px #007bff1a;outline:none}.toggle-switch{position:relative;width:44px;height:24px;flex-shrink:0;display:inline-block}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background:#cbd5e1;transition:.3s;border-radius:24px;display:flex;align-items:center;justify-content:center}.toggle-slider:before{content:"";position:absolute;height:18px;width:18px;left:3px;bottom:3px;background:#fff;transition:.3s;border-radius:50%;box-shadow:0 1px 3px #0003}.toggle-switch input:checked+.toggle-slider{background:var(--brand-primary, #007BFF)}.toggle-switch input:checked+.toggle-slider:before{transform:translate(20px)}.toggle-switch input:checked+.toggle-slider svg{color:#fff}.settings-btn{padding:8px 16px;border:none;border-radius:var(--r-sm, 6px);cursor:pointer;font-size:13px;font-weight:500;transition:all .2s}.settings-btn.secondary{background:var(--bg-hover, #f0f4fa);color:var(--text-primary, #1a2332)}.settings-btn.secondary:hover{background:var(--border, #e3e8f0)}.spinner.small{width:16px;height:16px;border-width:2px;display:inline-block;margin-right:6px}@media (max-width: 480px){.settings-modal{max-width:100%;margin:12px;border-radius:var(--r-md, 10px)}.settings-item{flex-direction:column;align-items:stretch;gap:6px}.settings-input{width:100%}.settings-item.toggle-item{flex-direction:row;align-items:center}}:root{--brand-primary: #007BFF;--brand-primary-dark: #0062cc;--brand-primary-light: #3395ff;--brand-primary-soft: #e6f2ff;--brand-navy: #002B5C;--brand-navy-light: #1a4577;--brand-accent: #0080FF;--brand-cyan: #00b8d9;--success: #10b981;--success-light: #d1fae5;--warning: #f59e0b;--danger: #ef4444;--danger-light: #fee2e2;--info: #3b82f6;--bg-app: #f4f7fb;--bg-panel: #ffffff;--bg-sidebar: #002B5C;--bg-sidebar-hover: rgba(255, 255, 255, .08);--bg-chat: #f0f4fa;--bg-input: #ffffff;--bg-hover: #f0f4fa;--bg-bubble-me: #007BFF;--bg-bubble-them: #ffffff;--text-primary: #1a2332;--text-secondary: #5b6779;--text-muted: #9aa5b8;--text-inverse: #ffffff;--text-on-brand: #ffffff;--text-link: #007BFF;--border: #e3e8f0;--border-light: #eef2f7;--border-brand: #007BFF;--shadow-sm: 0 1px 2px rgba(0, 43, 92, .06);--shadow-md: 0 4px 12px rgba(0, 43, 92, .08);--shadow-lg: 0 8px 24px rgba(0, 43, 92, .12);--shadow-brand: 0 4px 16px rgba(0, 123, 255, .25);--r-sm: 6px;--r-md: 10px;--r-lg: 14px;--r-xl: 20px;--r-full: 999px;--sp-1: 4px;--sp-2: 8px;--sp-3: 12px;--sp-4: 16px;--sp-5: 20px;--sp-6: 24px;--sp-8: 32px;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-display: "Poppins", "Inter", sans-serif;--sidebar-w: 340px;--header-h: 64px;--input-h: 64px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;width:100%}body{font-family:var(--font-sans);color:var(--text-primary);background:var(--bg-app);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:14px;line-height:1.5;overflow:hidden}button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;font-size:inherit;padding:0}input,textarea{font-family:inherit;font-size:inherit;outline:none;border:none;background:none;color:inherit}a{color:var(--brand-primary);text-decoration:none}a:hover{text-decoration:underline}ul,ol{list-style:none}img{display:block;max-width:100%}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#002b5c2e;border-radius:var(--r-full)}::-webkit-scrollbar-thumb:hover{background:#002b5c52}.app{display:flex;height:100vh;width:100vw;overflow:hidden}.btn-brand{background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%);color:#fff;padding:10px 20px;border-radius:var(--r-md);font-weight:600;display:inline-flex;align-items:center;gap:8px;transition:all .18s ease;box-shadow:var(--shadow-brand)}.btn-brand:hover{transform:translateY(-1px);box-shadow:0 6px 20px #007bff59}.btn-brand:active{transform:translateY(0)}.btn-brand:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-ghost{padding:8px 14px;border-radius:var(--r-md);color:var(--text-secondary);font-weight:500;transition:all .15s ease}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary)}.btn-outline{padding:10px 18px;border-radius:var(--r-md);border:1.5px solid var(--brand-primary);color:var(--brand-primary);font-weight:600;background:#fff;transition:all .15s ease}.btn-outline:hover{background:var(--brand-primary-soft)}.icon-btn{width:38px;height:38px;border-radius:var(--r-full);display:inline-flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:all .15s ease}.icon-btn:hover{background:var(--bg-hover);color:var(--brand-primary)}.icon-btn.active{background:var(--brand-primary-soft);color:var(--brand-primary)}.brand-logo{display:inline-flex;align-items:center;gap:10px;font-family:var(--font-display);font-weight:700}.brand-logo .logo-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;font-family:var(--font-display);box-shadow:var(--shadow-brand);position:relative;overflow:hidden}.brand-logo .logo-mark:after{content:"";position:absolute;top:6px;right:6px;width:4px;height:4px;background:#fff;border-radius:1px;box-shadow:0 0 0 2px #fff6}.spinner{width:24px;height:24px;border:2.5px solid var(--brand-primary-soft);border-top-color:var(--brand-primary);border-radius:50%;animation:spin .7s linear infinite}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#002b5c8c;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;animation:fadeIn .18s ease}.modal{background:#fff;border-radius:var(--r-lg);width:100%;max-width:460px;max-height:90vh;overflow-y:auto;box-shadow:var(--shadow-lg);animation:slideUp .22s ease}.modal-header{padding:20px 24px;border-bottom:1px solid var(--border-light);display:flex;align-items:center;justify-content:space-between}.modal-header h3{font-family:var(--font-display);font-size:18px;font-weight:600;color:var(--brand-navy)}.modal-body{padding:20px 24px}.modal-footer{padding:16px 24px;border-top:1px solid var(--border-light);display:flex;gap:10px;justify-content:flex-end}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.toast-container{position:fixed;bottom:24px;right:24px;z-index:2000;display:flex;flex-direction:column;gap:10px}.toast{background:#fff;border-left:4px solid var(--brand-primary);padding:12px 18px;border-radius:var(--r-md);box-shadow:var(--shadow-lg);font-size:13px;font-weight:500;display:flex;align-items:center;gap:10px;animation:slideInRight .25s ease;min-width:240px}.toast.success{border-left-color:var(--success)}.toast.error{border-left-color:var(--danger)}.toast.warning{border-left-color:var(--warning)}@keyframes slideInRight{0%{transform:translate(20px);opacity:0}to{transform:translate(0);opacity:1}}.form-group{margin-bottom:16px}.form-label{display:block;font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:6px}.form-input{width:100%;padding:11px 14px;border:1.5px solid var(--border);border-radius:var(--r-md);background:#fff;color:var(--text-primary);transition:all .15s ease;font-size:14px}.form-input:focus{border-color:var(--brand-primary);box-shadow:0 0 0 3px #007bff1f}.form-input::placeholder{color:var(--text-muted)}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--text-muted);text-align:center;padding:24px}.empty-state .empty-icon{width:76px;height:76px;border-radius:50%;background:var(--brand-primary-soft);color:var(--brand-primary);display:flex;align-items:center;justify-content:center;margin-bottom:16px}.empty-state h3{color:var(--text-secondary);font-family:var(--font-display);font-weight:600;font-size:16px;margin-bottom:6px}.empty-state p{font-size:13px;max-width:320px}.mobile-back-btn{display:none!important}@media (min-width: 769px){.app .sidebar{display:flex!important;width:var(--sidebar-w, 340px)!important;min-width:var(--sidebar-w, 340px)!important;position:static!important;transform:none!important}.app .chat-area{display:flex!important;position:static!important;transform:none!important}}@media (max-width: 768px){.app{position:relative;overflow:hidden}.app .sidebar{width:100%!important;min-width:100%!important;display:flex}.app .chat-area,.app.mobile-view-chat .sidebar{display:none}.app.mobile-view-chat .chat-area{display:flex;width:100%}.mobile-back-btn{display:inline-flex!important;align-items:center;justify-content:center;color:var(--text-primary, #1a2332);background:transparent;border:none;padding:8px;border-radius:50%;cursor:pointer;flex-shrink:0;transition:background .15s ease}.mobile-back-btn:hover{background:var(--bg-hover, #f0f4fa)}.members-panel{position:absolute!important;top:0;right:0;width:100%!important;height:100%;z-index:30;box-shadow:-8px 0 24px #00000026}.modal{max-width:calc(100vw - 24px)!important;max-height:90vh!important;margin:12px}.chat-header{padding:0 12px!important}.chat-header .header-info .title{font-size:15px}.chat-header .icon-btn{width:36px;height:36px}.message-list{padding:12px!important}.message-input-wrap{padding:8px 12px 12px!important}.auth-screen{flex-direction:column!important}.auth-left{display:none!important}.auth-right{width:100%!important;padding:24px!important;box-shadow:none!important}.sidebar-header{padding:12px!important}.video-tile{width:100%!important;max-width:360px;height:220px}.typing-indicator-container{padding:4px 12px 8px!important}}@media (max-width: 480px){.chat-item{padding:8px 10px!important}.chat-item .avatar{width:40px!important;height:40px!important;font-size:14px!important}.message-bubble{max-width:85%!important;font-size:13px!important}.video-tile{height:180px!important}}.install-button{animation:slideUp .5s ease-out}@keyframes slideUp{0%{transform:translate(-50%) translateY(100px);opacity:0}to{transform:translate(-50%) translateY(0);opacity:1}}@media all and (display-mode: standalone){.app{height:100vh;height:100dvh}.app{padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}}@media all and (display-mode: standalone){body{background-color:#007bff}}.app{height:100vh;height:100dvh;min-height:100vh;min-height:100dvh}.sidebar{width:var(--sidebar-w);min-width:var(--sidebar-w);background:var(--bg-sidebar);background:linear-gradient(180deg,#002b5c,#001f47);color:#fff;display:flex;flex-direction:column;border-right:1px solid rgba(255,255,255,.06);height:100vh;overflow:hidden}.sidebar-header{padding:16px 18px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.08);background:#00000026;flex-shrink:0}.sidebar-header .brand-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px}.sidebar-header .brand-logo .logo-mark{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,#fff,#d6eaff);color:var(--brand-primary);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;box-shadow:0 2px 8px #007bff66;flex-shrink:0}.sidebar-header .brand-name{display:flex;flex-direction:column;line-height:1.1}.sidebar-header .brand-name .brand-title{font-family:var(--font-display);font-weight:700;font-size:18px;letter-spacing:-.3px}.sidebar-header .brand-name .brand-sub{font-size:10px;font-weight:500;color:#ffffff8c;letter-spacing:.6px;text-transform:uppercase;margin-top:2px}.sidebar-header-actions{display:flex;gap:4px;flex-shrink:0;position:relative}.sidebar-header-actions .icon-btn{color:#ffffffb3;background:none;border:none;padding:6px;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.sidebar-header-actions .icon-btn:hover{background:#ffffff1f;color:#fff}.online-pill{margin:12px 18px 0;padding:6px 14px;background:#10b98126;border:1px solid rgba(16,185,129,.3);border-radius:var(--r-full);font-size:11px;font-weight:600;color:#6ee7b7;display:inline-flex;align-items:center;gap:6px;width:fit-content;flex-shrink:0}.online-pill .dot{width:6px;height:6px;background:#10b981;border-radius:50%;box-shadow:0 0 #10b981b3;animation:pulse 2s infinite}@keyframes pulse{0%{box-shadow:0 0 #10b981b3}70%{box-shadow:0 0 0 6px #10b98100}to{box-shadow:0 0 #10b98100}}.sidebar-search{padding:12px 18px 8px;flex-shrink:0}.sidebar-search .search-wrap{position:relative;display:flex;align-items:center}.sidebar-search .search-wrap svg{position:absolute;left:12px;color:#ffffff73;pointer-events:none;z-index:1}.sidebar-search input{width:100%;padding:10px 38px;background:#ffffff14;color:#fff;border:1px solid rgba(255,255,255,.1);border-radius:var(--r-md);font-size:13px;transition:all .15s ease;outline:none}.sidebar-search input::placeholder{color:#ffffff80}.sidebar-search input:focus{background:#ffffff1f;border-color:var(--brand-primary);box-shadow:0 0 0 3px #007bff33}.sidebar-search .clear-search{position:absolute;right:10px;background:#ffffff26;border:none;color:#ffffffb3;cursor:pointer;font-size:16px;padding:2px 8px;border-radius:4px;display:flex;align-items:center;justify-content:center;transition:all .2s;z-index:1}.sidebar-search .clear-search:hover{background:#ffffff40;color:#fff}.chat-list{flex:1;overflow-y:auto;padding:4px 8px 16px}.chat-list::-webkit-scrollbar{width:4px}.chat-list::-webkit-scrollbar-track{background:transparent}.chat-list::-webkit-scrollbar-thumb{background:#fff3;border-radius:2px}.chat-list::-webkit-scrollbar-thumb:hover{background:#ffffff4d}.chat-list-section-label{padding:12px 12px 6px;font-size:10px;font-weight:700;letter-spacing:1px;color:#fff6;text-transform:uppercase}.chat-list-empty{padding:40px 20px;text-align:center;color:#fff9}.chat-list-empty .empty-icon{font-size:36px;margin-bottom:12px;opacity:.6}.chat-list-empty p{font-weight:500;margin-bottom:4px;color:#fffc}.chat-list-empty span{font-size:13px;color:#ffffff80}.chat-list-loading{padding:40px 20px;text-align:center;color:#fff9}.chat-list-loading .loader{width:30px;height:30px;border:3px solid rgba(255,255,255,.1);border-top-color:var(--brand-primary);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 12px}@keyframes spin{to{transform:rotate(360deg)}}.chat-item{padding:10px 12px;display:flex;align-items:center;gap:12px;border-radius:var(--r-md);cursor:pointer;transition:background .15s ease;position:relative}.chat-item:hover{background:#ffffff0f}.chat-item.active{background:linear-gradient(135deg,#007bff38,#0080ff1f);box-shadow:inset 3px 0 0 var(--brand-primary)}.chat-item .avatar{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:16px;flex-shrink:0;position:relative;font-family:var(--font-display);box-shadow:0 2px 6px #00000026}.chat-item .avatar.group{background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%)}.chat-item .avatar .online-dot{position:absolute;bottom:0;right:0;width:12px;height:12px;background:#10b981;border:2px solid #002B5C;border-radius:50%}.chat-item .avatar .online-dot.offline{background:#6b7280}.chat-item .info{flex:1;min-width:0}.chat-item .info .top-row{display:flex;justify-content:space-between;align-items:baseline;gap:8px;margin-bottom:2px}.chat-item .info .name{font-weight:600;font-size:14px;color:#fff;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-item .info .time{font-size:10px;color:#fff6;flex-shrink:0}.chat-item .info .last-msg{font-size:12.5px;color:#ffffff8c;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:flex;align-items:center;gap:4px}.chat-item .info .last-msg .sender{color:#ffffffb3;font-weight:500}.chat-item .unread-badge{background:var(--brand-primary);color:#fff;font-size:10px;font-weight:700;min-width:20px;height:20px;padding:0 6px;border-radius:var(--r-full);display:inline-flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 2px 6px #007bff66}.dropdown{position:absolute;top:calc(100% + 6px);right:0;background:#fff;border-radius:var(--r-md);box-shadow:var(--shadow-lg);min-width:200px;padding:6px;z-index:100;animation:slideUp .15s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.dropdown-item{padding:9px 12px;border-radius:var(--r-sm);font-size:13px;color:var(--text-primary);display:flex;align-items:center;gap:10px;cursor:pointer;transition:background .12s ease}.dropdown-item:hover{background:var(--bg-hover)}.dropdown-item.danger{color:var(--danger)}.dropdown-item.danger:hover{background:var(--danger-light)}.dropdown-divider{height:1px;background:var(--border-light);margin:4px 0}.sidebar-footer{padding:12px 16px;border-top:1px solid rgba(255,255,255,.08);display:flex;align-items:center;gap:10px;background:#00000026;flex-shrink:0}.sidebar-footer .avatar{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px;font-family:var(--font-display);flex-shrink:0}.sidebar-footer .me-info{flex:1;min-width:0}.sidebar-footer .me-info .name{color:#fff;font-weight:600;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.sidebar-footer .me-info .status{color:#ffffff80;font-size:11px}.sidebar-footer .icon-btn{color:#ffffffb3;background:none;border:none;padding:6px;border-radius:8px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}.sidebar-footer .icon-btn:hover{background:#ffffff1f;color:#fff}.brand-logo{display:flex;align-items:center;gap:10px;color:#fff;font-size:18px;min-width:0}.brand-logo-img{width:40px;height:40px;border-radius:10px;object-fit:contain;flex-shrink:0;background:#ffffff1a;padding:2px}.brand-logo .brand-name{display:flex;flex-direction:column;line-height:1.1;min-width:0}.brand-logo .brand-name .brand-title{font-family:var(--font-display);font-weight:700;font-size:18px;letter-spacing:-.3px;white-space:nowrap;color:#fff}.brand-logo .brand-name .brand-sub{font-size:9px;font-weight:500;color:#ffffff8c;letter-spacing:.6px;text-transform:uppercase;margin-top:1px;white-space:nowrap}@media (max-width: 768px){.brand-logo-img{width:32px;height:32px}.brand-logo .brand-name .brand-title{font-size:15px}.brand-logo .brand-name .brand-sub{font-size:8px}}.theme-dark .brand-logo-img{background:#ffffff0d}.chat-item.pinned{background:#ffffff0a}.chat-item.pinned:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(180deg,var(--brand-primary) 0%,var(--brand-accent) 100%);border-radius:0 2px 2px 0}.chat-item.archived{opacity:.7}.chat-item.archived .name{font-style:italic}.chat-item.muted .last-msg{opacity:.6}.chat-list-section-label.pinned-label{color:#007bffe6;font-weight:700}.chat-list-section-label.archived-label{color:#ffffff80;font-weight:600;-webkit-user-select:none;user-select:none}.chat-list-section-label.archived-label:hover{color:#ffffffb3}.chat-item .unread-badge.manual-unread{background:var(--brand-primary);width:10px;height:10px;min-width:10px;padding:0}.context-menu.chat-context-menu{background:#fff;border-radius:12px;box-shadow:0 8px 30px #00000040,0 2px 8px #0000001a;padding:6px;min-width:220px;animation:contextMenuSlideUp .15s ease;border:1px solid rgba(0,0,0,.06)}@keyframes contextMenuSlideUp{0%{opacity:0;transform:scale(.95) translateY(4px)}to{opacity:1;transform:scale(1) translateY(0)}}.context-menu.chat-context-menu .context-menu-item{padding:10px 14px;border-radius:8px;display:flex;align-items:center;gap:12px;cursor:pointer;font-size:14px;color:#1a2332;transition:background .12s ease;font-weight:500}.context-menu.chat-context-menu .context-menu-item:hover{background:#f0f4fa}.context-menu.chat-context-menu .context-menu-item.danger{color:#ef4444}.context-menu.chat-context-menu .context-menu-item.danger:hover{background:#fee2e2}.context-menu.chat-context-menu .context-menu-divider{height:1px;background:#eef2f7;margin:4px 0}@media (hover: none) and (pointer: coarse){.chat-item{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none}}@media (max-width: 600px){.context-menu.chat-context-menu{min-width:180px;max-width:calc(100vw - 32px)}.context-menu.chat-context-menu .context-menu-item{padding:12px 14px;font-size:15px}}.chat-area{flex:1;display:flex;flex-direction:column;height:100vh;background:var(--bg-chat);min-width:0;position:relative}.chat-header{height:var(--header-h);padding:0 20px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;gap:12px;box-shadow:var(--shadow-sm);z-index:10}.chat-header .header-left{display:flex;align-items:center;gap:12px;flex:1;min-width:0}.chat-header .header-left .avatar{width:42px;height:42px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-family:var(--font-display);flex-shrink:0;box-shadow:var(--shadow-sm)}.chat-header .header-left .avatar.group{background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%)}.chat-header .header-left .avatar.user-1{background:linear-gradient(135deg,#6366f1,#8b5cf6)}.chat-header .header-left .avatar.user-2{background:linear-gradient(135deg,#ec4899,#f43f5e)}.chat-header .header-left .avatar.user-3{background:linear-gradient(135deg,#10b981,#059669)}.chat-header .header-left .avatar.user-4{background:linear-gradient(135deg,#f59e0b,#ef4444)}.chat-header .header-left .avatar.user-5{background:linear-gradient(135deg,#06b6d4,#0284c7)}.chat-header .header-info{flex:1;min-width:0}.chat-header .header-info .title{font-family:var(--font-display);font-weight:600;font-size:16px;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-header .header-info .subtitle{font-size:12px;color:var(--text-muted);display:flex;align-items:center;gap:6px}.chat-header .header-info .subtitle .dot{width:6px;height:6px;background:#10b981;border-radius:50%}.chat-header .header-actions{display:flex;gap:4px;align-items:center}.message-list{flex:1;overflow-y:auto;padding:20px 24px;display:flex;flex-direction:column;gap:8px}.message-date-separator{text-align:center;margin:16px 0 8px;position:relative;color:var(--text-muted);font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.message-date-separator:before,.message-date-separator:after{content:"";position:absolute;top:50%;width:calc(50% - 60px);height:1px;background:var(--border)}.message-date-separator:before{left:0}.message-date-separator:after{right:0}.message-bubble{max-width:70%;padding:10px 14px;border-radius:var(--r-lg);font-size:14px;line-height:1.45;position:relative;word-wrap:break-word;animation:bubbleIn .18s ease}@keyframes bubbleIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.message-row{display:flex;margin-bottom:4px}.message-row.me{justify-content:flex-end}.message-row.them{justify-content:flex-start}.message-row.them+.message-row.them .message-bubble,.message-row.me+.message-row.me .message-bubble{margin-top:-2px}.message-bubble.me{background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%);color:#fff;border-bottom-right-radius:4px;box-shadow:0 2px 8px #007bff40}.message-bubble.them{background:#fff;color:var(--text-primary);border-bottom-left-radius:4px;border:1px solid var(--border-light);box-shadow:var(--shadow-sm)}.message-bubble .sender-name{font-size:11px;font-weight:700;margin-bottom:3px;color:var(--brand-primary)}.message-bubble.me .sender-name{color:#ffffffd9}.message-bubble .meta{font-size:10px;margin-top:4px;display:flex;align-items:center;gap:4px;justify-content:flex-end}.message-bubble.me .meta{color:#ffffffb3}.message-bubble.them .meta{color:var(--text-muted)}.message-bubble .file-attachment{display:flex;align-items:center;gap:10px;padding:8px 12px;background:#0000000d;border-radius:var(--r-md);margin-bottom:4px;cursor:pointer;transition:background .15s ease}.message-bubble.me .file-attachment{background:#ffffff26;color:#fff}.message-bubble .file-attachment:hover{background:#00000014}.message-bubble.me .file-attachment:hover{background:#ffffff38}.message-bubble .file-attachment .file-icon{width:32px;height:32px;background:var(--brand-primary);border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;color:#fff}.message-bubble.me .file-attachment .file-icon{background:#ffffff40}.message-bubble .file-attachment .file-info{flex:1}.message-bubble .file-attachment .file-name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:200px}.message-bubble .file-attachment .file-size{font-size:11px;opacity:.7}.message-input-wrap{padding:12px 20px 16px;background:#fff;border-top:1px solid var(--border);display:flex;align-items:flex-end;gap:10px}.message-input-wrap .input-actions{display:flex;gap:2px;align-items:center}.message-input-wrap .input-field{flex:1;background:var(--bg-chat);border:1.5px solid var(--border);border-radius:var(--r-xl);padding:10px 14px;display:flex;align-items:center;gap:8px;transition:all .15s ease;max-height:120px;overflow-y:auto}.message-input-wrap .input-field:focus-within{border-color:var(--brand-primary);background:#fff;box-shadow:0 0 0 3px #007bff1f}.message-input-wrap .input-field textarea{flex:1;resize:none;border:none;background:transparent;font-size:14px;line-height:1.4;max-height:80px;color:var(--text-primary)}.message-input-wrap .input-field textarea::placeholder{color:var(--text-muted)}.send-btn{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:all .18s ease;box-shadow:var(--shadow-brand)}.send-btn:hover{transform:scale(1.06) rotate(-8deg);box-shadow:0 6px 20px #007bff66}.send-btn:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.emoji-picker-wrap{position:absolute;bottom:80px;left:20px;z-index:50;box-shadow:var(--shadow-lg);border-radius:var(--r-md);overflow:hidden}.members-panel{width:280px;background:#fff;border-left:1px solid var(--border);display:flex;flex-direction:column;height:100vh;animation:slideRight .2s ease}@keyframes slideRight{0%{transform:translate(20px);opacity:0}to{transform:translate(0);opacity:1}}.members-panel .panel-header{padding:18px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.members-panel .panel-header h3{font-family:var(--font-display);font-size:16px;font-weight:600;color:var(--brand-navy)}.members-panel .panel-body{flex:1;overflow-y:auto;padding:8px}.members-panel .member-row{padding:10px 12px;display:flex;align-items:center;gap:12px;border-radius:var(--r-md);transition:background .15s ease}.members-panel .member-row:hover{background:var(--bg-hover)}.members-panel .member-row .avatar{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:14px;font-family:var(--font-display);flex-shrink:0;position:relative}.members-panel .member-row .info{flex:1;min-width:0}.members-panel .member-row .info .name{font-weight:600;font-size:13.5px;color:var(--text-primary)}.members-panel .member-row .info .role{font-size:11px;color:var(--text-muted);text-transform:capitalize}.members-panel .member-row .role-badge{font-size:10px;font-weight:700;padding:3px 8px;border-radius:var(--r-full);background:var(--brand-primary-soft);color:var(--brand-primary);text-transform:uppercase;letter-spacing:.5px}.members-panel .member-row .role-badge.admin{background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%);color:#fff}.chat-empty{flex:1;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;padding:24px;color:var(--text-muted)}.chat-empty .empty-icon{width:96px;height:96px;border-radius:50%;background:linear-gradient(135deg,var(--brand-primary-soft) 0%,#fff 100%);color:var(--brand-primary);display:flex;align-items:center;justify-content:center;margin-bottom:20px;box-shadow:var(--shadow-md)}.chat-empty h2{font-family:var(--font-display);color:var(--brand-navy);font-size:22px;font-weight:700;margin-bottom:8px}.chat-empty p{max-width:380px;font-size:14px;line-height:1.6;margin-bottom:16px}.typing-indicator{display:inline-flex;align-items:center;gap:4px;padding:8px 12px;background:#fff;border-radius:var(--r-lg);border:1px solid var(--border-light);font-size:12px;color:var(--text-muted);margin-left:0;align-self:flex-start}.typing-indicator .dots{display:inline-flex;gap:3px}.typing-indicator .dots span{width:6px;height:6px;background:var(--brand-primary);border-radius:50%;animation:typing 1.4s infinite}.typing-indicator .dots span:nth-child(2){animation-delay:.2s}.typing-indicator .dots span:nth-child(3){animation-delay:.4s}@keyframes typing{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-5px);opacity:1}}.reply-indicator{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;background:var(--brand-primary-soft);border-left:3px solid var(--brand-primary);margin:0 16px 4px;border-radius:4px 4px 0 0}.reply-indicator-content{display:flex;align-items:center;gap:10px;flex:1;min-width:0}.reply-indicator-text{display:flex;flex-direction:column;min-width:0}.reply-indicator-label{font-size:11px;font-weight:600;color:var(--brand-primary)}.reply-indicator-message{font-size:13px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.reply-cancel-btn{background:none;border:none;cursor:pointer;color:var(--text-muted);padding:4px;border-radius:50%;display:flex;align-items:center;transition:background .2s}.reply-cancel-btn:hover{background:#0000000d}.reply-preview{display:flex;gap:8px;padding:6px 10px;margin-bottom:6px;background:#0000000a;border-radius:4px;border-left:3px solid var(--brand-primary)}.reply-preview-line{display:none}.reply-preview-content{display:flex;flex-direction:column;min-width:0}.reply-preview-sender{font-size:11px;font-weight:600;color:var(--brand-primary)}.reply-preview-text{font-size:12px;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.context-menu{background:#fff;border-radius:12px;box-shadow:0 8px 30px #0003;padding:6px;min-width:200px;animation:contextSlideUp .15s ease}@keyframes contextSlideUp{0%{opacity:0;transform:scale(.95) translateY(4px)}to{opacity:1;transform:scale(1) translateY(0)}}.context-menu-item{padding:10px 14px;border-radius:8px;display:flex;align-items:center;gap:12px;cursor:pointer;font-size:14px;color:var(--text-primary);transition:background .15s}.context-menu-item:hover{background:var(--bg-hover)}.context-menu-item.danger{color:var(--danger)}.context-menu-item.danger:hover{background:var(--danger-light)}.context-menu-divider{height:1px;background:var(--border-light);margin:4px 0}.image-message-wrapper{margin-bottom:2px;max-width:280px}.image-message{width:100%;max-height:200px;min-height:60px;object-fit:cover;border-radius:8px;cursor:pointer;background:#f0f2f5;transition:opacity .2s}.image-message:hover{opacity:.9}.image-caption{font-size:13px;margin-top:4px;color:var(--text-primary)}.image-meta{display:flex;align-items:center;gap:4px;font-size:11px;color:var(--text-muted);margin-top:2px;flex-wrap:wrap}.image-error{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px;background:#f0f2f5;border-radius:8px;min-height:80px;color:#65676b;gap:4px}.file-message-wrapper{display:flex;align-items:center;gap:12px;padding:10px 14px;background:var(--bg-hover, #f0f2f5);border-radius:8px;cursor:pointer;transition:background .2s;min-width:180px;max-width:260px}.file-message-wrapper:hover{background:var(--border, #e4e6eb)}.file-icon-container{width:36px;height:36px;border-radius:6px;background:var(--brand-primary);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}.file-message-info{flex:1;min-width:0}.file-message-name{font-size:12px;font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-message-size{font-size:10px;color:var(--text-muted)}.file-caption{margin-top:4px}.message-text{white-space:pre-wrap;word-break:break-word}.file-preview-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#000000d9;z-index:9999;display:flex;align-items:center;justify-content:center;animation:fadeIn .25s ease}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.file-preview-modal{background:#fff;border-radius:16px;width:92%;max-width:900px;max-height:92vh;display:flex;flex-direction:column;overflow:hidden;box-shadow:0 24px 80px #00000080;animation:previewSlideUp .3s ease}@keyframes previewSlideUp{0%{transform:translateY(30px) scale(.95);opacity:0}to{transform:translateY(0) scale(1);opacity:1}}.file-preview-header{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;border-bottom:1px solid var(--border, #e4e6eb);background:#fff;flex-shrink:0}.file-preview-title{display:flex;align-items:center;gap:10px;min-width:0}.file-icon-header{font-size:20px}.file-preview-name{font-size:15px;font-weight:600;color:var(--text-primary);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-preview-actions{display:flex;gap:4px}.action-btn{background:none;border:none;padding:8px 10px;border-radius:8px;cursor:pointer;color:var(--text-secondary);transition:all .2s;display:flex;align-items:center;justify-content:center}.action-btn:hover{background:var(--bg-hover)}.close-btn-header:hover{background:#fee;color:#e74c3c}.download-btn-header:hover{background:#e7f3ff;color:var(--brand-primary)}.file-preview-body{flex:1;overflow:auto;padding:20px;display:flex;align-items:center;justify-content:center;background:#f8f9fa;min-height:300px;max-height:65vh}.preview-image-content{max-width:100%;max-height:60vh;object-fit:contain;border-radius:8px}.preview-file-content{text-align:center;padding:30px}.file-icon-large{font-size:64px;margin-bottom:12px}.file-name-large{font-size:18px;font-weight:500;color:var(--text-primary);margin-bottom:4px;word-break:break-all}.file-size-large{font-size:14px;color:var(--text-secondary);margin-bottom:20px}.download-btn{background:var(--brand-primary);color:#fff;border:none;padding:10px 24px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:background .2s;display:inline-flex;align-items:center;gap:8px}.download-btn:hover{background:var(--brand-primary-dark)}.file-preview-footer{display:flex;justify-content:space-between;padding:10px 20px;border-top:1px solid var(--border);background:#fff;flex-shrink:0;font-size:12px;color:var(--text-muted)}.forward-chat-item{padding:10px 12px;border-radius:8px;cursor:pointer;display:flex;align-items:center;gap:10px;transition:background .2s}.forward-chat-item:hover{background:var(--bg-hover)}.forward-chat-item.selected{background:var(--brand-primary-soft)}.reply-input-container{animation:slideUp .2s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 600px){.image-message-wrapper{max-width:200px}.image-message{max-height:150px;min-height:50px}.file-message-wrapper{max-width:180px;min-width:120px;padding:8px 12px}.context-menu{min-width:160px}.file-preview-modal{width:96%}.preview-image-content{max-height:50vh}}.typing-indicator-container{margin-top:4px}.typing-indicator{background:#fff;border:1px solid var(--border-light);border-radius:14px 14px 14px 4px;padding:8px 14px;display:inline-flex;align-items:center;gap:8px;box-shadow:var(--shadow-sm)}.typing-dots{display:inline-flex;gap:3px;align-items:center}.typing-dots span{width:6px;height:6px;background:var(--brand-primary);border-radius:50%;animation:typingBounce 1.4s infinite ease-in-out both}.typing-dots span:nth-child(1){animation-delay:-.32s}.typing-dots span:nth-child(2){animation-delay:-.16s}.typing-dots span:nth-child(3){animation-delay:0s}@keyframes typingBounce{0%,80%,to{transform:scale(.6);opacity:.4}40%{transform:scale(1);opacity:1}}.message-bubble.me .meta{display:flex;align-items:center;gap:2px;justify-content:flex-end}.upload-progress{animation:chathub-slide-up .2s ease}@keyframes chathub-slide-up{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.call-event-message{text-align:center;margin:8px 0}.call-event-pill{display:inline-flex;align-items:center;gap:6px;background:#007bff14;color:#5b6779;padding:6px 14px;border-radius:999px;font-size:12px;font-weight:600;border:1px solid rgba(0,123,255,.15)}.call-event-pill.missed{color:#ef4444;background:#ef444414;border-color:#ef444433}.call-event-pill.incoming{color:#10b981;background:#10b98114;border-color:#10b98133}.call-event-pill.outgoing{color:#007bff;background:#007bff14;border-color:#007bff33}.call-event-time{opacity:.6;font-weight:400;margin-left:4px}.reaction-picker{animation:chathub-slide-up .15s ease}.reactions-display{margin-top:4px}.reaction-pill{display:inline-flex;align-items:center;gap:4px;padding:2px 8px;border-radius:999px;background:#0000000f;border:1px solid transparent;font-size:13px;cursor:pointer;transition:all .15s ease}.reaction-pill:hover{transform:scale(1.05)}.voice-message{display:flex;align-items:center;gap:10px;padding:6px 10px;min-width:200px}.voice-message audio{display:none}.recording-indicator{animation:chathub-slide-up .2s ease}.recording-indicator .pulse-dot{width:10px;height:10px;border-radius:50%;background:#ef4444;animation:recordingPulse 1s infinite}@keyframes recordingPulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.2)}}.edit-mode textarea{font-family:inherit}.message-bubble .meta .edited{font-size:10px;opacity:.7;margin-right:4px;font-style:italic}.global-search-tabs{display:flex;gap:4px;padding:8px 20px;border-bottom:1px solid var(--border-light)}.user-profile-header{background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%);padding:24px 20px;text-align:center;color:#fff}@media (max-width: 768px){.reaction-picker button{font-size:18px;padding:6px 8px}.voice-message{min-width:160px}.modal{max-width:calc(100vw - 24px)!important}}.theme-light{--bg-app: #f4f7fb;--bg-panel: #ffffff;--bg-sidebar: #002B5C;--bg-chat: #f0f4fa;--text-primary: #1a2332;--text-secondary: #5b6779;--text-inverse: #ffffff}.theme-dark{--bg-app: #0a1929;--bg-panel: #102a43;--bg-sidebar: #001f47;--bg-chat: #0d1f33;--text-primary: #e6eef8;--text-secondary: #9fb3c8;--text-inverse: #ffffff;--bg-bubble-them: #1a3a5c;--border: #1f3a5c;--border-light: #1a3450;--bg-hover: #1a3450}.auth-screen{min-height:100vh;display:flex;background:linear-gradient(135deg,#002b5c,#001f47 50%,#007bff 200%);position:relative;overflow:hidden}.auth-screen:before{content:"";position:absolute;width:600px;height:600px;background:radial-gradient(circle,rgba(0,123,255,.18) 0%,transparent 70%);top:-200px;right:-200px;border-radius:50%}.auth-screen:after{content:"";position:absolute;width:500px;height:500px;background:radial-gradient(circle,rgba(0,128,255,.12) 0%,transparent 70%);bottom:-150px;left:-150px;border-radius:50%}.auth-left{flex:1;display:flex;flex-direction:column;justify-content:center;padding:60px 80px;color:#fff;position:relative;z-index:2}.auth-left .brand-large{display:flex;align-items:center;gap:16px;margin-bottom:60px}.auth-left .brand-large .logo-mark{width:64px;height:64px;border-radius:16px;background:#fff;color:var(--brand-primary);display:flex;align-items:center;justify-content:center;font-size:40px;font-weight:800;font-family:var(--font-display);box-shadow:0 10px 30px #007bff66;position:relative}.auth-left .brand-large .brand-text .name{font-family:var(--font-display);font-size:28px;font-weight:800;letter-spacing:-.5px}.auth-left .brand-large .brand-text .sub{font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:#fff9;margin-top:2px}.auth-left h1{font-family:var(--font-display);font-size:44px;font-weight:700;line-height:1.15;margin-bottom:20px;letter-spacing:-.5px}.auth-left h1 .highlight{background:linear-gradient(135deg,#4da3ff,#00b8d9);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.auth-left p{font-size:17px;color:#ffffffbf;margin-bottom:36px;line-height:1.6;max-width:480px}.auth-features{display:flex;flex-direction:column;gap:16px;max-width:480px}.auth-feature{display:flex;align-items:center;gap:14px;color:#ffffffe6}.auth-feature .feat-icon{width:38px;height:38px;border-radius:10px;background:#007bff40;color:#4da3ff;display:flex;align-items:center;justify-content:center;flex-shrink:0;border:1px solid rgba(0,123,255,.35)}.auth-feature .feat-text{font-size:14px;font-weight:500}.auth-feature .feat-text strong{display:block;font-weight:700;margin-bottom:1px;color:#fff}.auth-feature .feat-text span{color:#fff9;font-size:12px}.auth-right{width:520px;background:#fff;display:flex;align-items:center;justify-content:center;padding:40px;position:relative;z-index:2;box-shadow:-20px 0 60px #00000040}.auth-card{width:100%;max-width:380px}.auth-card .auth-tabs{display:flex;background:var(--bg-app);border-radius:var(--r-md);padding:4px;margin-bottom:28px}.auth-card .auth-tab{flex:1;padding:10px;border-radius:var(--r-sm);text-align:center;font-weight:600;font-size:13px;color:var(--text-secondary);transition:all .18s ease}.auth-card .auth-tab.active{background:#fff;color:var(--brand-primary);box-shadow:var(--shadow-sm)}.auth-card h2{font-family:var(--font-display);font-size:26px;font-weight:700;color:var(--brand-navy);margin-bottom:6px}.auth-card .auth-subtitle{color:var(--text-secondary);font-size:14px;margin-bottom:24px}.auth-card .demo-notice{background:var(--brand-primary-soft);border:1px solid rgba(0,123,255,.25);border-radius:var(--r-md);padding:10px 12px;font-size:12px;color:var(--brand-navy);margin-bottom:18px;display:flex;gap:8px;align-items:flex-start}.video-call-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0a1929;z-index:1500;display:flex;flex-direction:column}.video-call-header{padding:14px 20px;display:flex;align-items:center;justify-content:space-between;color:#fff;background:#0000004d}.video-call-header .call-info{display:flex;align-items:center;gap:12px}.video-call-header .call-info .call-name{font-family:var(--font-display);font-weight:600;font-size:16px}.video-call-header .call-info .call-timer{font-size:13px;color:#ffffffb3;display:flex;align-items:center;gap:6px}.video-call-header .call-info .live-dot{width:8px;height:8px;background:var(--danger);border-radius:50%;animation:pulse 1.5s infinite}.video-stage{flex:1;display:flex;align-items:center;justify-content:center;position:relative;padding:20px;gap:16px;flex-wrap:wrap}.video-tile{width:360px;height:270px;background:linear-gradient(135deg,#1a2c4a,#0a1929);border-radius:var(--r-lg);position:relative;overflow:hidden;border:2px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center}.video-tile.local{border-color:var(--brand-primary)}.video-tile .tile-avatar{width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,var(--brand-primary) 0%,var(--brand-accent) 100%);color:#fff;display:flex;align-items:center;justify-content:center;font-size:32px;font-weight:700;font-family:var(--font-display)}.video-tile .tile-label{position:absolute;bottom:10px;left:12px;padding:4px 10px;background:#0009;color:#fff;font-size:12px;font-weight:600;border-radius:var(--r-full);display:flex;align-items:center;gap:6px}.video-tile .tile-label .mic-icon{color:var(--success)}.video-tile .tile-label .mic-icon.muted{color:var(--danger)}.video-controls{padding:20px;display:flex;align-items:center;justify-content:center;gap:14px;background:#0006}.video-control-btn{width:52px;height:52px;border-radius:50%;background:#ffffff1f;color:#fff;display:flex;align-items:center;justify-content:center;transition:all .18s ease;border:none;cursor:pointer}.video-control-btn:hover{background:#ffffff38;transform:translateY(-2px)}.video-control-btn.active{background:#fff3}.video-control-btn.end-call{background:var(--danger);width:64px;height:64px}.video-control-btn.end-call:hover{background:#dc2626}.file-upload-zone{border:2px dashed var(--border);border-radius:var(--r-md);padding:24px;text-align:center;cursor:pointer;transition:all .18s ease;background:var(--bg-app)}.file-upload-zone:hover,.file-upload-zone.dragover{border-color:var(--brand-primary);background:var(--brand-primary-soft)}.file-upload-zone .upload-icon{width:48px;height:48px;margin:0 auto 12px;background:var(--brand-primary-soft);color:var(--brand-primary);border-radius:50%;display:flex;align-items:center;justify-content:center}.file-upload-zone .upload-text{font-weight:600;color:var(--text-primary);margin-bottom:4px}.file-upload-zone .upload-hint{font-size:12px;color:var(--text-muted)}.file-list{display:flex;flex-direction:column;gap:8px;margin-top:12px}.file-list-item{padding:10px 12px;background:var(--bg-app);border-radius:var(--r-md);display:flex;align-items:center;gap:12px;border:1px solid var(--border-light)}.file-list-item .file-icon{width:36px;height:36px;border-radius:var(--r-sm);background:var(--brand-primary);color:#fff;display:flex;align-items:center;justify-content:center;flex-shrink:0}.file-list-item .file-meta{flex:1;min-width:0}.file-list-item .file-meta .name{font-size:13px;font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-list-item .file-meta .size{font-size:11px;color:var(--text-muted)}.search-bar{position:relative;display:flex;align-items:center}.search-bar svg{position:absolute;left:12px;color:var(--text-muted);pointer-events:none}.search-bar input{width:100%;padding:10px 12px 10px 38px;border:1.5px solid var(--border);border-radius:var(--r-md);background:#fff;font-size:13px;transition:all .15s ease}.search-bar input:focus{border-color:var(--brand-primary);box-shadow:0 0 0 3px #007bff1f}.loader-full{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh;gap:14px;background:linear-gradient(135deg,#002b5c,#001f47);color:#fff}.loader-full .spinner{width:36px;height:36px;border:3px solid rgba(255,255,255,.2);border-top-color:var(--brand-primary)}@media (max-width: 768px){.sidebar{width:100%;min-width:100%}.chat-area,.app.show-chat .sidebar{display:none}.app.show-chat .chat-area{display:flex}.auth-left{display:none}.auth-right{width:100%}.members-panel{display:none}}