:root {
            --orange: #ff6b00;
            --orange-light: #ff8c3a;
            --orange-dark: #d95a00;
            --gray-light: #f5f5f5;
            --gray: #e0e0e0;
            --gray-dark: #333333;
            --black: #222222;
            --white: #ffffff;
        }

        body {
            font-family: 'Roboto', sans-serif;
            background-color: var(--gray-light);
            color: var(--black);
            line-height: 1.6;
            overflow-x: hidden;
        }

        .sidebar {
            width: 260px;
            background-color: var(--white);
            box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
            position: fixed;
            height: 100vh;
            overflow-y: auto;
            z-index: 1000;
            transition: transform 0.3s ease-in-out;
        }

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

        .sidebar-toggle {
            display: none;
            position: fixed;
            top: 10px;
            left: 10px;
            z-index: 1050;
            background-color: var(--orange);
            color: white;
            border: none;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            justify-content: center;
            align-items: center;
            cursor: pointer;
        }

        .overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 999;
        }

        .logo {
            padding: 0 20px 20px;
            border-bottom: 1px solid var(--gray);
            margin-bottom: 20px;
        }

        .logo h1 {
            font-size: 24px;
            font-weight: 700;
            color: var(--orange);
        }

        .logo p {
            font-size: 14px;
            color: var(--gray-dark);
        }

        .nav-section h3 {
            font-size: 16px;
            font-weight: 500;
            color: var(--gray-dark);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .nav-link {
            color: var(--black);
            font-size: 16px;
            transition: all 0.3s;
            position: relative;
        }

        .nav-link:hover {
            background-color: var(--gray-light);
        }

        .nav-link.active {
            background-color: rgba(255, 107, 0, 0.1);
            color: var(--orange);
            font-weight: 500;
        }

        .nav-link.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 4px;
            background-color: var(--orange);
        }

        .main-content {
            margin-left: 260px;
            transition: margin-left 0.3s ease-in-out;
        }

        .user-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--orange);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }

        .card-icon {
            width: 40px;
            height: 40px;
            background-color: rgba(255, 107, 0, 0.15);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--orange);
            font-size: 18px;
        }

        .card-value {
            font-size: 28px;
            font-weight: 700;
            color: var(--orange);
        }

        .section-title {
            font-size: 22px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--orange);
        }

        .specifications-container {
            background-color: var(--white);
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            overflow: hidden;
            margin-bottom: 30px;
        }

        .spec-header {
            background-color: rgba(255, 107, 0, 0.05);
            padding: 15px 20px;
            cursor: pointer;
            border-bottom: 1px solid var(--gray);
        }

        .spec-header h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--orange);
            margin-bottom: 0;
        }

        .spec-info {
            display: flex;
            gap: 15px;
            font-size: 14px;
            color: #666;
        }

        .spec-info span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .spec-content {
            display: none;
        }

        .spec-content.open {
            display: block;
        }

        .part {
            border-bottom: 1px solid var(--gray-light);
        }

        .part:last-child {
            border-bottom: none;
        }

        .part-header {
            padding: 15px 20px;
            cursor: pointer;
            background-color: rgba(0, 0, 0, 0.02);
        }

        .part-header h4 {
            font-size: 16px;
            font-weight: 500;
            margin-bottom: 0;
        }

        .part-info {
            display: flex;
            gap: 15px;
            font-size: 14px;
            color: #666;
        }

        .part-info span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .part-content {
            display: none;
            padding: 15px 20px;
            background-color: var(--white);
        }

        .part-content.open {
            display: block;
        }

        .file-preview {
            width: 40px;
            height: 40px;
            background-color: #f0f0f0;
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #999;
        }

        .file-actions {
            display: flex;
            gap: 5px;
            justify-content: flex-end;
        }

        .file-btn {
            width: 30px;
            height: 30px;
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: var(--gray-light);
            color: var(--black);
            cursor: pointer;
            transition: all 0.2s;
            border: none;
        }

        .file-btn:hover {
            background-color: var(--orange);
            color: white;
        }

        .progress-bar {
            height: 10px;
            background-color: var(--gray);
            border-radius: 5px;
        }

        .progress {
            background-color: var(--orange);
            border-radius: 5px;
        }

        .notification.warning {
            background-color: rgba(255, 193, 7, 0.2);
            border-left: 4px solid #ffc107;
        }

        .btn-primary {
            background-color: var(--orange);
            border-color: var(--orange);
        }

        .btn-primary:hover {
            background-color: var(--orange-dark);
            border-color: var(--orange-dark);
        }

        .btn-outline-custom {
            background-color: transparent;
            border: 1px solid var(--orange);
            color: var(--orange);
        }

        .btn-outline-custom:hover {
            background-color: rgba(255, 107, 0, 0.1);
        }

        /* Адаптивность */
        @media (max-width: 992px) {
            .sidebar {
                width: 220px;
            }
            .main-content {
                margin-left: 220px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                width: 260px;
                transform: translateX(-100%);
            }
            .sidebar.show {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .sidebar-toggle {
                display: flex;
            }
            .nav-links {
                display: flex;
                overflow-x: auto;
                padding-bottom: 10px;
            }
            .nav-links li {
                flex-shrink: 0;
            }
        }