* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: "Roboto", Arial, sans-serif;
            background: #0f0f0f;
            color: #fff;
        }

        /* Header */
        .header {
            background: #212121;
            padding: 0 16px;
            position: sticky;
            top: 0;
            z-index: 1001;
            display: flex;
            align-items: center;
            height: 56px;
            gap: 40px;
        }

        .menu-icon {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border-radius: 50%;
            transition: background 0.2s;
        }

        .menu-icon:hover {
            background: rgba(255,255,255,0.1);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 20px;
            font-weight: 500;
            cursor: pointer;
            text-decoration: none;
            color: #fff;
        }

        .logo i {
            color: #ff0000;
            font-size: 32px;
        }

        .search-container {
            flex: 1;
            max-width: 600px;
            display: flex;
        }

        .search-box {
            flex: 1;
            display: flex;
            align-items: center;
            height: 40px;
            border: 1px solid #303030;
            border-radius: 40px 0 0 40px;
            background: #121212;
        }

        .search-input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            padding: 0 16px;
            color: #fff;
            font-size: 16px;
        }

        .search-input::placeholder {
            color: #888;
        }

        .search-btn {
            width: 64px;
            height: 40px;
            background: #303030;
            border: 1px solid #303030;
            border-radius: 0 40px 40px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background 0.2s;
            border: none;
        }

        .search-btn:hover {
            background: #3f3f3f;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: auto;
        }

        .icon-btn {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            border-radius: 50%;
            transition: background 0.2s;
            position: relative;
        }

        .icon-btn:hover {
            background: rgba(255,255,255,0.1);
        }

        .user-icon {
            width: 32px;
            height: 32px;
            background: #f00;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 500;
            cursor: pointer;
        }

        /* Sidebar */
        .sidebar {
            width: 240px;
            background: #212121;
            position: fixed;
            top: 56px;
            left: 0;
            bottom: 0;
            overflow-y: auto;
            padding: 12px 0;
            z-index: 1000;
            transition: transform 0.3s;
        }

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

        .sidebar::-webkit-scrollbar-thumb {
            background: #717171;
            border-radius: 4px;
        }

        .sidebar-search {
            display: none;
            padding: 12px 12px;
            margin-bottom: 8px;
        }

        .sidebar-search-form {
            display: flex;
            align-items: center;
            height: 40px;
            background: #121212;
            border: 1px solid #303030;
            border-radius: 20px;
            overflow: hidden;
        }

        .sidebar-search-input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            padding: 0 16px;
            color: #fff;
            font-size: 14px;
        }

        .sidebar-search-input::placeholder {
            color: #888;
        }

        .sidebar-search-btn {
            min-width: 44px;
            height: 40px;
            background: transparent;
            border: none;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: #fff;
            flex-shrink: 0;
        }

        .sidebar-item {
            display: flex;
            align-items: center;
            gap: 24px;
            padding: 0 24px;
            height: 40px;
            cursor: pointer;
            transition: background 0.2s;
            text-decoration: none;
            color: #fff;
        }

        .sidebar-item:hover {
            background: rgba(255,255,255,0.1);
        }

        .sidebar-item.active {
            background: rgba(255,255,255,0.15);
        }

        .sidebar-item i {
            width: 24px;
            font-size: 20px;
            flex-shrink: 0;
        }

        .sidebar-divider {
            height: 1px;
            background: rgba(255,255,255,0.1);
            margin: 12px 0;
        }

        .sidebar-title {
            padding: 8px 24px;
            font-size: 14px;
            font-weight: 500;
            color: #aaa;
            text-transform: uppercase;
        }

        /* Main Content */
        .main-content {
            margin-left: 240px;
            padding: 40px;
            max-width: 1200px;
        }

        /* Content Container */
        .content-container {
            background: #212121;
            border-radius: 12px;
            padding: 40px;
        }

        .content-header {
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .content-title {
            font-size: 36px;
            font-weight: 500;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .content-title i {
            color: #ff0000;
        }

        .content-subtitle {
            color: #aaa;
            font-size: 16px;
        }

        .content-body {
            line-height: 1.8;
        }

        .content-body h2 {
            font-size: 24px;
            font-weight: 500;
            margin-top: 32px;
            margin-bottom: 16px;
            color: #fff;
        }

        .content-body h3 {
            font-size: 20px;
            font-weight: 500;
            margin-top: 24px;
            margin-bottom: 12px;
            color: #fff;
        }

        .content-body p {
            margin-bottom: 16px;
            color: #ccc;
        }

        .content-body ul, .content-body ol {
            margin-bottom: 16px;
            margin-left: 24px;
            color: #ccc;
        }

        .content-body li {
            margin-bottom: 8px;
        }

        .content-body a {
            color: white;
            text-decoration: none;
            transition: color 0.2s;
        }

        .content-body a:hover {
            color: white;
            text-decoration: underline;
        }

        .content-body strong {
            color: #fff;
            font-weight: 500;
        }

        .info-box {
            background: rgba(255,255,255,0.05);
            border-left: 4px solid #ff0000;
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: 4px;
        }

        .info-box p {
            margin-bottom: 0;
        }

        .contact-form {
            margin-top: 32px;
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #fff;
        }

        .form-input,
        .form-textarea {
            width: 100%;
            background: #121212;
            border: 1px solid #303030;
            border-radius: 8px;
            padding: 12px 16px;
            color: #fff;
            font-size: 14px;
            font-family: inherit;
            transition: border-color 0.2s;
        }

        .form-input:focus,
        .form-textarea:focus {
            outline: none;
            border-color: #ff0000;
        }

        .form-textarea {
            min-height: 150px;
            resize: vertical;
        }

        .form-btn {
            background: #ff0000;
            color: #fff;
            border: none;
            padding: 12px 32px;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: background 0.2s;
        }

        .form-btn:hover {
            background: #cc0000;
        }

        /* Sidebar overlay */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0,0,0,0.5);
            z-index: 999;
        }

        .sidebar-overlay.active {
            display: block;
        }

        /* Footer */
        .footer {
            background: #212121;
            padding: 40px;
            margin-left: 240px;
            margin-top: 60px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 24px;
        }

        .footer-link {
            color: #aaa;
            text-decoration: none;
            transition: color 0.2s;
            font-size: 14px;
        }

        .footer-link:hover {
            color: #fff;
        }

        .footer-link.active {
            color: #ff0000;
        }

        .footer-text {
            color: #666;
            font-size: 13px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .main-content {
                margin-left: 0;
                padding: 24px;
            }

            .footer {
                margin-left: 0;
            }
        }

        @media (max-width: 768px) {
            .header {
                gap: 16px;
            }

            .search-container {
                display: none;
            }

            .sidebar-search {
                display: block;
            }

            .content-container {
                padding: 24px;
            }

            .content-title {
                font-size: 28px;
            }

            .content-body h2 {
                font-size: 20px;
            }

            .footer-links {
                gap: 16px;
            }
        }