:root {
            --hb-primary: #1B4D3E;
            --hb-dark-green: #0F3A2E;
            --hb-purple: #800080;
            --hb-deep-pink: #FF1493;
            --hb-purple-light: #f3e8f3;
            --hb-pink-light: #fff0f7;
            --hb-primary-light: #e8f3ef;
            
            --text-dark: #1A1A1A;
            --text-light: #4A4A4A;
            --text-muted: #666666;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --border-light: #e1e1e1;
            
            --shadow-sm: 0 5px 15px rgba(27, 77, 62, 0.08);
            --shadow-md: 0 10px 25px rgba(128, 0, 128, 0.1);
            --shadow-lg: 0 20px 40px rgba(255, 20, 147, 0.15);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Mina', sans-serif;
        }

        body {
            background-color: var(--bg-light);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            padding-top: 70px;
        }

        .main-nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background-color: rgba(255, 255, 255, 0.98);
            z-index: 9999;
            padding: 10px 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            backdrop-filter: blur(10px);
        }

        #LOGO {
            width: 130px;
            height: auto;
            transition: var(--transition);
        }

        #LOGO:hover {
            transform: scale(1.05);
        }

        .profile-img {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            border: 2px solid var(--hb-primary);
            object-fit: cover;
            transition: var(--transition);
            box-shadow: 0 2px 8px rgba(27, 77, 62, 0.2);
        }

        .profile-img:hover {
            transform: scale(1.1);
            border-color: var(--hb-deep-pink);
            box-shadow: 0 4px 12px rgba(255, 20, 147, 0.3);
        }

        .page-header {
            background: linear-gradient(135deg, var(--hb-primary) 0%, var(--hb-purple) 50%, var(--hb-deep-pink) 100%);
            color: #fff;
            padding: 40px 20px;
            margin: -50px 0 30px 0;
            border-radius: 0 0 30px 30px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .page-header:before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,.1) 0%, transparent 70%);
            animation: rotate 20s linear infinite;
        }

        .page-header h1 {
            color: #fff;
            font-size: clamp(24px, 5vw, 36px);
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            animation: fadeInDown 1s ease;
        }

        .page-header p {
            color: rgba(255,255,255,.9);
            font-size: clamp(14px, 3vw, 18px);
            position: relative;
            animation: fadeInUp 1s ease .2s both;
            max-width: 600px;
            margin: 0 auto;
        }

        @keyframes rotate {
            from { transform: rotate(0); }
            to { transform: rotate(360deg); }
        }

        .search-box {
            position: relative;
            margin-bottom: 20px;
            margin-top: -37px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .search-box input {
            width: 100%;
            padding: 15px 20px 15px 50px;
            border: 2px solid var(--border-light);
            border-radius: 20px;
            font-size: 16px;
            transition: var(--transition);
            background: var(--bg-white);
        }

        .search-box input:focus {
            outline: none;
            border-color: var(--hb-purple);
            box-shadow: 0 0 0 4px rgba(128, 0, 128, 0.1);
        }

        .search-box i {
            position: absolute;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--hb-primary);
            font-size: 18px;
        }

        .filter-section {
            background: var(--bg-white);
            border-radius: 20px;
            padding: 20px;
            margin-bottom: 30px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .filter-title {
            color: var(--hb-primary);
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 15px;
            padding-bottom: 10px;
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--hb-primary), var(--hb-deep-pink));
            border-image-slice: 1;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .filter-title i {
            color: var(--hb-deep-pink);
            font-size: 20px;
        }

        .filter-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .filter-btn {
            padding: 10px 20px;
            border: 2px solid var(--hb-primary);
            border-radius: 30px;
            background: transparent;
            color: var(--hb-primary);
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            transition: var(--transition);
            flex: 0 1 auto;
            min-width: 80px;
        }

        .filter-btn:hover {
            border-color: var(--hb-deep-pink);
            color: var(--hb-deep-pink);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .filter-btn.active {
            background: linear-gradient(135deg, var(--hb-primary), var(--hb-purple));
            border-color: transparent;
            color: #fff;
            box-shadow: 0 5px 15px rgba(128, 0, 128, 0.3);
        }

        .category-card {
            background: var(--bg-white);
            border-radius: 20px;
            padding: 20px;
            margin-bottom: 20px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border-left: 5px solid transparent;
            border-image: linear-gradient(135deg, var(--hb-primary), var(--hb-deep-pink));
            border-image-slice: 1;
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--hb-primary), var(--hb-purple), var(--hb-deep-pink));
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }

        .category-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }

        .category-card:hover::before {
            transform: scaleX(1);
        }

        .category-header {
            display: flex;
            align-items: center;
            gap: 15px;
            cursor: pointer;
            user-select: none;
        }

        .category-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--hb-primary), var(--hb-purple));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 20px;
            flex-shrink: 0;
        }

        .category-title {
            flex: 1;
        }

        .category-title h3 {
            color: var(--hb-primary);
            font-size: clamp(16px, 4vw, 20px);
            font-weight: 600;
            margin: 0;
        }

        .category-title p {
            color: var(--text-muted);
            font-size: 13px;
            margin: 5px 0 0;
        }

        .category-toggle {
            color: var(--hb-deep-pink);
            font-size: 18px;
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }

        .category-toggle.rotated {
            transform: rotate(180deg);
        }

        .files-list {
            display: none;
            padding: 15px 0 0;
            margin-top: 15px;
            border-top: 1px solid var(--border-light);
        }

        .files-list.show {
            display: block;
            animation: slideDown 0.3s ease;
        }

        @keyframes slideDown {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .file-item {
            display: flex;
            align-items: center;
            padding: 15px;
            background: var(--bg-light);
            border-radius: 12px;
            margin-bottom: 10px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
            gap: 15px;
        }

        .file-item:hover {
            border-color: var(--hb-deep-pink);
            box-shadow: var(--shadow-md);
        }

        .file-icon {
            width: 45px;
            height: 45px;
            background: linear-gradient(135deg, var(--hb-primary-light), var(--hb-pink-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--hb-primary);
            font-size: 20px;
            flex-shrink: 0;
        }

        .file-info {
            flex: 1;
            min-width: 0;
        }

        .file-name {
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 5px;
            font-size: clamp(13px, 3vw, 15px);
            word-break: break-word;
        }

        .file-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px 15px;
            font-size: 12px;
            color: var(--text-muted);
        }

        .file-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        .file-meta i {
            color: var(--hb-deep-pink);
            font-size: 12px;
        }

        .file-size {
            background: linear-gradient(135deg, var(--hb-primary-light), var(--hb-pink-light));
            padding: 3px 8px;
            border-radius: 5px;
            color: var(--hb-primary);
            font-size: 11px;
            font-weight: 600;
            white-space: nowrap;
        }

        .download-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--hb-primary), var(--hb-purple));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .download-btn:hover {
            background: linear-gradient(135deg, var(--hb-purple), var(--hb-deep-pink));
            transform: scale(1.1);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

        .no-results {
            text-align: center;
            padding: 50px 20px;
            background: var(--bg-white);
            border-radius: 20px;
            box-shadow: var(--shadow-sm);
            margin: 20px 0;
            border: 1px solid var(--border-light);
        }

        .no-results i {
            font-size: 50px;
            color: var(--hb-primary);
            margin-bottom: 20px;
        }

        .no-results h3 {
            color: var(--text-dark);
            font-size: clamp(18px, 4vw, 22px);
            margin-bottom: 10px;
        }

        .no-results p {
            color: var(--text-muted);
            font-size: 14px;
        }

        @media (max-width: 768px) {
            body {
                padding-top: 60px;
            }

            .main-nav {
                padding: 8px 16px;
            }

            #LOGO {
                width: 100px;
            }

            .profile-img {
                width: 36px;
                height: 36px;
            }

            .page-header {
                padding: 30px 15px;
                border-radius: 0 0 20px 20px;
            }

            .filter-section {
                padding: 15px;
            }

            .filter-buttons {
                gap: 8px;
            }

            .filter-btn {
                padding: 8px 16px;
                font-size: 13px;
                min-width: 70px;
            }

            .category-card {
                padding: 15px;
            }

            .file-item {
                padding: 12px;
                gap: 12px;
            }

            .file-icon {
                width: 40px;
                height: 40px;
                font-size: 18px;
            }

            .file-meta {
                gap: 8px 12px;
            }
        }

        @media (max-width: 480px) {
            .main-nav {
                padding: 6px 12px;
            }

            #LOGO {
                width: 85px;
            }

            .profile-img {
                width: 32px;
                height: 32px;
            }

            .page-header {
                padding: 25px 12px;
            }

            .filter-btn {
                padding: 6px 12px;
                font-size: 12px;
                min-width: 60px;
            }

            .file-item {
                flex-wrap: wrap;
            }

            .download-btn {
                width: 100%;
                height: 38px;
                border-radius: 8px;
                margin-top: 5px;
            }

            .file-info {
                width: 100%;
            }

            .file-meta {
                font-size: 11px;
            }

            .category-icon {
                width: 45px;
                height: 45px;
                font-size: 18px;
            }
        }

        @media (max-height: 500px) and (orientation: landscape) {
            .page-header {
                padding: 15px;
            }
        }

        @media (hover: none) {
            .filter-btn:hover,
            .download-btn:hover {
                transform: none;
            }

            .category-card:hover {
                transform: none;
            }
        }