* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background: #f0f2f5;
            color: #050505;
            font-size: 15px;
        }

        /* Facebook Header */
        .fb-header {
            background: #fff;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 56px;
        }

        .fb-header .container-fluid {
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            max-width: 100%;
        }

        .fb-header-left {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }

        .fb-logo {
            font-size: 40px;
            color: #1877f2;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .fb-search-box {
            position: relative;
        }

        .fb-search-box input {
            background: #f0f2f5;
            border: none;
            border-radius: 50px;
            padding: 10px 16px 10px 40px;
            width: 240px;
            font-size: 15px;
        }

        .fb-search-box i {
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: #65676b;
        }

        .fb-header-center {
            display: flex;
            gap: 4px;
            flex: 2;
            justify-content: center;
        }

        .fb-nav-btn {
            width: 112px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #65676b;
            font-size: 24px;
            border: none;
            background: transparent;
            border-bottom: 3px solid transparent;
            cursor: pointer;
            transition: background 0.2s;
        }

        .fb-nav-btn:hover {
            background: #f0f2f5;
            border-radius: 8px 8px 0 0;
        }

        .fb-nav-btn.active {
            color: #1877f2;
            border-bottom-color: #1877f2;
        }

        .fb-header-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: flex-end;
        }

        .fb-icon-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: #e4e6eb;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: #050505;
            cursor: pointer;
            position: relative;
        }

        .fb-icon-btn:hover {
            background: #d8dadf;
        }

        .fb-user-btn {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 4px 8px 4px 4px;
            border-radius: 50px;
            background: #e4e6eb;
            border: none;
            cursor: pointer;
        }

        .fb-user-btn:hover {
            background: #d8dadf;
        }

        .fb-user-btn img {
            width: 32px;
            height: 32px;
            border-radius: 50%;
        }

        .fb-user-btn span {
            font-weight: 600;
            font-size: 15px;
            color: #050505;
        }

        /* Main Layout */
        .fb-main {
            margin-top: 56px;
            padding-top: 16px;
        }

        .fb-sidebar-left {
            position: fixed;
            top: 72px;
            left: 0;
            width: 280px;
            height: calc(100vh - 72px);
            overflow-y: auto;
            padding: 0 8px;
        }

        .fb-sidebar-left::-webkit-scrollbar {
            width: 8px;
        }

        .fb-sidebar-left::-webkit-scrollbar-thumb {
            background: #bcc0c4;
            border-radius: 8px;
        }

        .fb-sidebar-item {
            display: flex;
            align-items: center;
            padding: 8px;
            border-radius: 8px;
            text-decoration: none;
            color: #050505;
            margin-bottom: 2px;
            transition: background 0.2s;
        }

        .fb-sidebar-item:hover {
            background: #e4e6eb;
            color: #050505;
        }

        .fb-sidebar-item.active {
            background: #e7f3ff;
            color: #050505;
        }

        .fb-sidebar-item img, .fb-sidebar-item .icon-circle {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            margin-right: 12px;
        }

        .icon-circle {
            display: flex;
            align-items: center;
            justify-content: center;
            background: #e4e6eb;
            font-size: 20px;
        }

        .fb-sidebar-item.active .icon-circle {
            background: #1877f2;
            color: #fff;
        }

        .fb-sidebar-item span {
            font-weight: 500;
            font-size: 15px;
        }

        .fb-center-content {
            margin-left: 280px;
            margin-right: 320px;
            padding: 0 32px;
            max-width: auto;
        }

        .fb-sidebar-right {
            position: fixed;
            top: 72px;
            right: 0;
            width: 280px;
            height: calc(100vh - 72px);
            overflow-y: auto;
            padding: 0 8px;
        }

        /* Create Post Box - Facebook Style */
        .fb-create-box {
            background: #fff;
            border-radius: 8px;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
            padding: 12px 16px 10px;
            margin-bottom: 16px;
        }

        .fb-create-top {
            display: flex;
            gap: 8px;
            padding-bottom: 12px;
            border-bottom: 1px solid #e4e6eb;
            cursor: pointer;
        }

        .fb-create-top img {
            width: 40px;
            height: 40px;
            border-radius: 50%;
        }

        .fb-create-input {
            flex: 1;
            background: #f0f2f5;
            border: none;
            border-radius: 50px;
            padding: 10px 16px;
            font-size: 17px;
            color: #65676b;
            cursor: pointer;
        }

        .fb-create-input:hover {
            background: #e4e6eb;
        }

        .fb-create-actions {
            display: flex;
            justify-content: space-around;
            padding-top: 8px;
        }

        .fb-action-btn {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 8px;
            border-radius: 6px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: #65676b;
            transition: background 0.2s;
        }

        .fb-action-btn:hover {
            background: #f0f2f5;
        }

        .fb-action-btn i {
            font-size: 24px;
        }

        .fb-action-btn.video i { color: #f3425f; }
        .fb-action-btn.photo i { color: #45bd62; }
        .fb-action-btn.feeling i { color: #f7b928; }

        /* Form Card - Facebook Style */
        .fb-post-card {
            background: #fff;
            border-radius: 8px;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
            margin-bottom: 16px;
        }

        .fb-post-header {
            display: flex;
            align-items: center;
            padding: 12px 16px;
            border-bottom: 1px solid #e4e6eb;
        }

        .fb-post-header img {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            margin-right: 8px;
        }

        .fb-post-user h3 {
            font-size: 15px;
            font-weight: 600;
            margin: 0;
            color: #050505;
        }

        .fb-post-user p {
            font-size: 13px;
            color: #65676b;
            margin: 0;
        }

        .fb-post-body {
            padding: 16px;
        }

        .fb-form-group {
            margin-bottom: 12px;
        }

        .fb-label {
            font-weight: 600;
            font-size: 15px;
            color: #050505;
            display: block;
            margin-bottom: 6px;
        }

        .fb-input {
            width: 100%;
            background: #f0f2f5;
            border: 1px solid #ccd0d5;
            border-radius: 6px;
            padding: 10px 12px;
            font-size: 15px;
            transition: all 0.2s;
            font-family: inherit;
        }

        .fb-input:focus {
            outline: none;
            background: #fff;
            border-color: #1877f2;
            box-shadow: 0 0 0 2px #e7f3ff;
        }

        .fb-input::placeholder {
            color: #8a8d91;
        }

        textarea.fb-input {
            resize: vertical;
            min-height: 60px;
        }

        .fb-row {
            display: flex;
            gap: 12px;
        }

        .fb-col {
            flex: 1;
        }

        .fb-input-icon {
            position: relative;
        }

        .fb-input-icon .icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: #65676b;
            font-size: 18px;
        }

        .fb-input-icon .fb-input {
            padding-left: 40px;
        }

        /* Radio Buttons */
        .fb-radio-wrapper {
            display: flex;
            gap: 16px;
            padding: 8px 0;
        }

        .fb-radio-label {
            display: flex;
            align-items: center;
            cursor: pointer;
        }

        .fb-radio-label input {
            width: 20px;
            height: 20px;
            margin-right: 8px;
            cursor: pointer;
            accent-color: #1877f2;
        }

        .fb-radio-label span {
            font-size: 15px;
            color: #050505;
        }

        /* Submit Button */
        .fb-post-footer {
            padding: 12px 16px;
            border-top: 1px solid #e4e6eb;
        }

        .fb-submit-btn {
            width: 100%;
            background: #1877f2;
            color: #fff;
            border: none;
            border-radius: 6px;
            padding: 10px 16px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
        }

        .fb-submit-btn:hover {
            background: #166fe5;
        }

        .fb-submit-btn:active {
            background: #1465d6;
        }

        /* Info Box */
        .fb-sponsored {
            background: #fff;
            border-radius: 8px;
            box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
            padding: 16px;
            margin-bottom: 16px;
        }

        .fb-sponsored h4 {
            font-size: 17px;
            font-weight: 600;
            color: #65676b;
            margin-bottom: 12px;
        }

        .fb-info-item {
            display: flex;
            align-items: start;
            margin-bottom: 10px;
            padding: 8px;
            border-radius: 6px;
            transition: background 0.2s;
        }

        .fb-info-item:hover {
            background: #f0f2f5;
        }

        .fb-info-item i {
            color: #1877f2;
            margin-right: 10px;
            margin-top: 2px;
            font-size: 16px;
        }

        .fb-info-item span {
            font-size: 14px;
            color: #050505;
        }

        /* Activity */
        .fb-contact-item {
            display: flex;
            align-items: center;
            padding: 8px;
            border-radius: 8px;
            text-decoration: none;
            color: #050505;
            margin-bottom: 2px;
            transition: background 0.2s;
            cursor: pointer;
        }

        .fb-contact-item:hover {
            background: #e4e6eb;
        }

        .fb-contact-item .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            margin-right: 12px;
            position: relative;
        }

        .fb-contact-item .avatar .status {
            width: 12px;
            height: 12px;
            background: #31a24c;
            border: 2px solid #fff;
            border-radius: 50%;
            position: absolute;
            bottom: -2px;
            right: -2px;
        }

        .fb-contact-item .info h6 {
            font-size: 15px;
            font-weight: 500;
            margin: 0;
            color: #050505;
        }

        .fb-contact-item .info p {
            font-size: 13px;
            color: #65676b;
            margin: 0;
        }

        @media (max-width: 1100px) {
            .fb-sidebar-right { display: none; }
            .fb-center-content { margin-right: 0; }
        }

        @media (max-width: 900px) {
            .fb-sidebar-left { display: none; }
            .fb-center-content { margin-left: 0; padding: 0 16px; }
        }