:root{--fb-blue: #1877f2;--fb-blue-hover: #166fe5;--fb-green: #42b72a;--fb-bg: #f0f2f5;--fb-white: #ffffff;--fb-card: #ffffff;--fb-text: #050505;--fb-text-secondary: #65676b;--fb-divider: #ced0d4;--fb-hover: #f2f2f2;--fb-icon-bg: #e4e6eb;--fb-icon-bg-hover: #d8dadf;--fb-red: #e41e3f;--fb-shadow: 0 1px 2px rgba(0, 0, 0, .1);--fb-shadow-lg: 0 2px 12px rgba(0, 0, 0, .15);--header-height: 56px}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{min-height:100vh;background:var(--fb-bg);color:var(--fb-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:15px;line-height:1.34}a{text-decoration:none;color:inherit}button{border:none;background:none;cursor:pointer;font-family:inherit;font-size:inherit;color:inherit}input,textarea{border:none;outline:none;font-family:inherit;font-size:inherit}.app{min-height:100vh;background:var(--fb-bg)}.app-body{display:flex;padding-top:var(--header-height);max-width:1920px;margin:0 auto}.header{position:fixed;top:0;left:0;right:0;height:var(--header-height);background:var(--fb-white);box-shadow:var(--fb-shadow);display:flex;align-items:center;justify-content:space-between;padding:0 16px;z-index:100}.header-left{display:flex;align-items:center;gap:8px;min-width:280px}.fb-logo{width:40px;height:40px;background:var(--fb-blue);color:#fff;font-size:28px;font-weight:700;display:flex;align-items:center;justify-content:center;border-radius:50%;flex-shrink:0}.search-bar{display:flex;align-items:center;background:var(--fb-icon-bg);border-radius:50px;padding:8px 12px;gap:8px;width:240px}.search-bar input{background:transparent;width:100%;font-size:15px;color:var(--fb-text)}.search-bar input::placeholder{color:var(--fb-text-secondary)}.search-icon{font-size:14px;opacity:.6}.header-center{display:flex;align-items:center;gap:4px;flex:1;justify-content:center;max-width:590px}.nav-tab{position:relative;width:110px;height:48px;display:flex;align-items:center;justify-content:center;border-radius:8px;transition:background .2s}.nav-tab:hover{background:var(--fb-hover)}.nav-tab.active{background:transparent}.nav-tab.active .nav-icon{filter:none}.nav-icon{font-size:22px}.active-indicator{position:absolute;bottom:-4px;left:0;right:0;height:3px;background:var(--fb-blue);border-radius:3px 3px 0 0}.header-right{display:flex;align-items:center;gap:8px;min-width:280px;justify-content:flex-end}.icon-btn{width:40px;height:40px;border-radius:50%;background:var(--fb-icon-bg);display:flex;align-items:center;justify-content:center;font-size:18px;transition:background .2s;position:relative}.icon-btn:hover{background:var(--fb-icon-bg-hover)}.notification-btn{position:relative}.badge{position:absolute;top:-2px;right:-2px;background:var(--fb-red);color:#fff;font-size:11px;font-weight:700;width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center}.user-avatar{width:40px;height:40px;border-radius:50%;background:var(--fb-icon-bg);display:flex;align-items:center;justify-content:center;font-size:20px;cursor:pointer}.left-sidebar{position:fixed;top:var(--header-height);left:0;width:280px;height:calc(100vh - var(--header-height));overflow-y:auto;padding:8px 0;scrollbar-width:thin;scrollbar-color:var(--fb-divider) transparent}.sidebar-nav{padding:0 8px}.sidebar-item{display:flex;align-items:center;gap:12px;padding:8px;border-radius:8px;transition:background .2s;cursor:pointer;width:100%;text-align:left}.sidebar-item:hover{background:var(--fb-hover)}.sidebar-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;font-size:24px;flex-shrink:0}.user-item .sidebar-icon{font-size:28px}.shortcut-icon{border-radius:8px}.sidebar-label{font-size:15px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.see-more-btn .sidebar-icon{background:var(--fb-icon-bg);border-radius:50%;font-size:16px}.sidebar-divider{height:1px;background:var(--fb-divider);margin:8px 16px}.sidebar-section{padding:0 8px}.sidebar-heading{font-size:17px;font-weight:600;padding:8px;color:var(--fb-text-secondary)}.sidebar-footer{padding:16px;font-size:12px;color:var(--fb-text-secondary);line-height:1.8}.sidebar-footer a{color:var(--fb-text-secondary)}.sidebar-footer a:hover{text-decoration:underline}.sidebar-footer p{margin-top:4px}.feed-container{flex:1;max-width:680px;padding:16px 16px 40px;margin:0 280px}.stories-container{display:flex;gap:8px;overflow-x:auto;padding-bottom:16px;scrollbar-width:none}.stories-container::-webkit-scrollbar{display:none}.story-card{position:relative;min-width:112px;height:200px;border-radius:12px;overflow:hidden;cursor:pointer;transition:transform .2s;box-shadow:var(--fb-shadow)}.story-card:hover{transform:scale(1.02)}.story-bg{width:100%;height:100%;background:var(--fb-icon-bg);display:flex;align-items:center;justify-content:center}.create-story{border:1px solid var(--fb-divider)}.create-story .story-bg{background:var(--fb-white);flex-direction:column;gap:8px}.create-story-icon{width:40px;height:40px;background:var(--fb-blue);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;position:absolute;top:100px;left:50%;transform:translate(-50%);border:4px solid var(--fb-white)}.story-avatar{position:absolute;top:8px;left:8px;width:40px;height:40px;border-radius:50%;background:var(--fb-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:16px;border:3px solid var(--fb-blue)}.story-name{position:absolute;bottom:8px;left:8px;right:8px;font-size:13px;font-weight:600;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.6)}.create-story .story-name{color:var(--fb-text);text-align:center;text-shadow:none;top:148px;bottom:auto}.create-post{background:var(--fb-card);border-radius:8px;box-shadow:var(--fb-shadow);padding:12px 16px;margin-bottom:16px}.create-post-top{display:flex;align-items:center;gap:8px}.user-avatar-md{width:40px;height:40px;border-radius:50%;background:var(--fb-icon-bg);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}.create-post-input{flex:1;background:var(--fb-icon-bg);border:none;border-radius:50px;padding:8px 16px;font-size:17px;color:var(--fb-text-secondary);text-align:left;cursor:pointer;transition:background .2s}.create-post-input:hover{background:var(--fb-icon-bg-hover)}.create-post-divider{height:1px;background:var(--fb-divider);margin:12px 0}.create-post-actions{display:flex;justify-content:space-around}.post-action-btn{display:flex;align-items:center;gap:8px;padding:8px 16px;border-radius:8px;font-size:15px;font-weight:600;color:var(--fb-text-secondary);transition:background .2s}.post-action-btn:hover{background:var(--fb-hover)}.post-action-btn span{font-size:20px}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#ffffffb3;display:flex;align-items:center;justify-content:center;z-index:200}.modal{background:var(--fb-white);border-radius:8px;box-shadow:var(--fb-shadow-lg);width:500px;max-width:90vw;padding:16px}.modal-header{display:flex;align-items:center;justify-content:center;position:relative;padding-bottom:8px}.modal-header h2{font-size:20px;font-weight:700}.modal-close{position:absolute;right:0;width:36px;height:36px;border-radius:50%;background:var(--fb-icon-bg);display:flex;align-items:center;justify-content:center;font-size:18px;transition:background .2s}.modal-close:hover{background:var(--fb-icon-bg-hover)}.modal-divider{height:1px;background:var(--fb-divider);margin:8px 0}.modal-user{display:flex;align-items:center;gap:8px;padding:8px 0}.modal-username{font-weight:600;font-size:15px}.privacy-btn{background:var(--fb-icon-bg);border-radius:4px;padding:2px 8px;font-size:12px;font-weight:600;color:var(--fb-text-secondary);margin-top:2px}.modal-textarea{width:100%;min-height:120px;resize:none;font-size:24px;padding:4px 0;color:var(--fb-text)}.modal-textarea::placeholder{color:var(--fb-text-secondary)}.modal-addons{border:1px solid var(--fb-divider);border-radius:8px;padding:12px 16px;display:flex;align-items:center;justify-content:space-between;margin:12px 0}.modal-addons span{font-weight:600;font-size:15px}.addon-icons{display:flex;gap:4px}.addon-icons button{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:20px;transition:background .2s}.addon-icons button:hover{background:var(--fb-hover)}.post-submit-btn{width:100%;padding:8px;border-radius:6px;font-size:15px;font-weight:600;background:var(--fb-icon-bg);color:var(--fb-text-secondary);cursor:not-allowed;transition:all .2s}.post-submit-btn.active{background:var(--fb-blue);color:#fff;cursor:pointer}.post-submit-btn.active:hover{background:var(--fb-blue-hover)}.post{background:var(--fb-card);border-radius:8px;box-shadow:var(--fb-shadow);margin-bottom:16px;overflow:hidden}.post-header{display:flex;align-items:flex-start;justify-content:space-between;padding:12px 16px 0}.post-author-info{display:flex;gap:8px}.post-avatar{width:40px;height:40px;border-radius:50%;background:var(--fb-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:16px;flex-shrink:0}.post-author{font-weight:600;font-size:15px}.post-time{font-size:13px;color:var(--fb-text-secondary)}.post-menu-wrapper{position:relative}.post-dropdown{position:absolute;top:100%;right:0;background:var(--fb-white);border-radius:8px;box-shadow:var(--fb-shadow-lg);padding:8px;min-width:200px;z-index:10}.post-dropdown button{display:block;width:100%;text-align:left;padding:8px 12px;border-radius:6px;font-size:15px;transition:background .2s}.post-dropdown button:hover{background:var(--fb-hover)}.post-content{padding:8px 16px;font-size:15px;line-height:1.5;white-space:pre-wrap}.post-image{width:100%;height:300px;display:flex;align-items:center;justify-content:center;cursor:pointer}.post-image-placeholder{font-size:48px;opacity:.4}.post-stats{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;font-size:15px;color:var(--fb-text-secondary)}.post-stats-left{display:flex;align-items:center;gap:6px}.reaction-icons{font-size:16px}.post-stats-right{display:flex;gap:12px}.post-stats-right button{color:var(--fb-text-secondary);font-size:15px}.post-stats-right button:hover{text-decoration:underline}.post-divider{height:1px;background:var(--fb-divider);margin:0 16px}.post-actions{display:flex;padding:4px 16px}.post-action{flex:1;display:flex;align-items:center;justify-content:center;gap:6px;padding:8px 0;border-radius:4px;font-size:15px;font-weight:600;color:var(--fb-text-secondary);transition:background .2s}.post-action:hover{background:var(--fb-hover)}.post-action.liked{color:var(--fb-blue)}.comments-section{padding:8px 16px 12px}.comment{display:flex;gap:8px;margin-bottom:8px}.comment-avatar{width:32px;height:32px;border-radius:50%;background:var(--fb-icon-bg);display:flex;align-items:center;justify-content:center;font-size:14px;flex-shrink:0}.comment-bubble{background:var(--fb-icon-bg);border-radius:18px;padding:8px 12px}.comment-author{font-size:13px;font-weight:600}.comment-text{font-size:15px;line-height:1.3}.comment-input-row{display:flex;gap:8px;align-items:center;margin-top:4px}.comment-input-wrapper{flex:1;display:flex;align-items:center;background:var(--fb-icon-bg);border-radius:50px;padding:0 12px 0 16px}.comment-input-wrapper input{flex:1;background:transparent;padding:8px 0;font-size:15px}.comment-input-wrapper input::placeholder{color:var(--fb-text-secondary)}.comment-send-btn{color:var(--fb-blue);font-size:18px;padding:4px;opacity:.5;transition:opacity .2s}.comment-send-btn:not(:disabled){opacity:1;cursor:pointer}.right-sidebar{position:fixed;top:var(--header-height);right:0;width:280px;height:calc(100vh - var(--header-height));overflow-y:auto;padding:8px 8px 0;scrollbar-width:thin;scrollbar-color:var(--fb-divider) transparent}.sponsored-section{padding:0 8px}.sponsored-item{display:flex;gap:12px;padding:8px;border-radius:8px;transition:background .2s;margin-bottom:4px}.sponsored-item:hover{background:var(--fb-hover)}.sponsored-img{width:120px;height:120px;border-radius:8px;background:linear-gradient(135deg,var(--fb-blue),#42b72a);display:flex;align-items:center;justify-content:center;color:#fff;font-size:36px;font-weight:700;flex-shrink:0}.sponsored-info{display:flex;flex-direction:column;gap:4px;padding:4px 0}.sponsored-title{font-size:15px;font-weight:500}.sponsored-desc{font-size:12px;color:var(--fb-text-secondary)}.contacts-section{padding:0 8px}.contacts-header{display:flex;align-items:center;justify-content:space-between}.contacts-actions{display:flex;gap:4px}.icon-btn-sm{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;transition:background .2s}.icon-btn-sm:hover{background:var(--fb-hover)}.contact-item{display:flex;align-items:center;gap:12px;padding:8px;border-radius:8px;width:100%;text-align:left;transition:background .2s}.contact-item:hover{background:var(--fb-hover)}.contact-avatar{position:relative;width:36px;height:36px;border-radius:50%;background:var(--fb-icon-bg);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px;color:var(--fb-text-secondary);flex-shrink:0}.online-dot{position:absolute;bottom:-1px;right:-1px;width:10px;height:10px;background:var(--fb-green);border-radius:50%;border:2px solid var(--fb-white)}.contact-name{font-size:15px;font-weight:500}.group-conversations{padding:0 8px}@media(max-width:1200px){.right-sidebar{display:none}.feed-container{margin-right:0}}@media(max-width:900px){.left-sidebar{display:none}.feed-container{margin-left:0;max-width:100%}.header-left .search-bar{display:none}.header-left,.header-right{min-width:auto}.nav-tab{width:80px}}@media(max-width:600px){.header-center{display:none}.stories-container{gap:6px}.story-card{min-width:96px;height:168px}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--fb-divider);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--fb-text-secondary)}