:root {
            --primary-color: #3498db;
            --accent-color: #2980b9;
            --accent-color-2: #5bc0de;
            --accent-color-3: #5bc0de;
            --text-color: #f5f5f5;
            --bg-color: #121212;
            --panel-bg: #1a1a1a;
            --panel-border: #333333;
            --card-bg: #222222;
            --card-hover-bg: #2c2c2c;
            --highlight-color: #5bc0de;
            
            --light-primary-color: #3498db;
            --light-accent-color: #2980b9;
            --light-accent-color-2: #5bc0de;
            --light-accent-color-3: #5bc0de;
            --light-text-color: #333333;
            --light-bg-color: #f7f7f7;
            --light-panel-bg: #ffffff;
            --light-panel-border: #e0e0e0;
            --light-card-bg: #f0f0f0;
            --light-card-hover-bg: #e5e5e5;
            --light-highlight-color: #5bc0de;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-color);
            line-height: 1.6;
            transition: background-color 0.3s, color 0.3s;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        
        body.light-theme {
            --primary-color: var(--light-primary-color);
            --accent-color: var(--light-accent-color);
            --accent-color-2: var(--light-accent-color-2);
            --accent-color-3: var(--light-accent-color-3);
            --text-color: var(--light-text-color);
            --bg-color: var(--light-bg-color);
            --panel-bg: var(--light-panel-bg);
            --panel-border: var(--light-panel-border);
            --card-bg: var(--light-card-bg);
            --card-hover-bg: var(--light-card-hover-bg);
            --highlight-color: var(--light-highlight-color);
        }
        
        main {
            flex: 1;
            max-width: 1200px;
            width: 100%;
            margin: 40px auto;
            padding: 0 20px;
        }
        
        .section {
            margin-bottom: 60px;
            animation: fadeIn 0.6s ease-out forwards;
        }
        
        .section-title {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary-color);
            display: inline-block;
            position: relative;
        }
        
        .section-title:after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 40%;
            height: 2px;
            background-color: var(--accent-color-2);
        }
        
        .section-content {
            background-color: var(--card-bg);
            border-radius: 12px;
            padding: 35px;
            box-shadow: 0 6px 25px rgba(0, 0, 0, 0.12);
            border-top: 3px solid transparent;
            border-image: linear-gradient(to right, var(--primary-color), var(--accent-color-2));
            border-image-slice: 1;
        }
        
        .text-block {
            margin-bottom: 20px;
        }
        
        .text-block p {
            margin-bottom: 15px;
            font-size: 1.05rem;
        }
        
        .highlight {
            color: var(--highlight-color);
            font-weight: 500;
        }
        
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 30px;
        }
        
        .feature-item {
            background-color: rgba(52, 152, 219, 0.1);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            transition: transform 0.3s, background-color 0.3s;
            border-left: 3px solid var(--primary-color);
        }
        
        .feature-item:hover {
            transform: translateY(-5px);
            background-color: rgba(52, 152, 219, 0.2);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            font-size: 2rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        
        .feature-title {
            font-size: 1.1rem;
            font-weight: bold;
            margin-bottom: 10px;
        }
        
        .measurement-gallery {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 25px;
            margin: 30px 0;
        }
        
        .image-gallery {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 25px;
            margin: 30px 0;
        }
        
        .gallery-item {
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
            position: relative;
            transition: transform 0.3s;
        }
        
        .gallery-item:hover {
            transform: translateY(-8px);
        }
        
        .gallery-image {
            width: 100%;
            height: 300px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .gallery-item:hover .gallery-image {
            transform: scale(1.05);
        }
        
        .gallery-caption {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
            color: white;
            padding: 20px 15px 15px;
            font-size: 1rem;
            font-weight: 500;
        }
        
        .challenge-box {
            background-color: rgba(52, 152, 219, 0.08);
            border-left: 4px solid var(--accent-color-2);
            padding: 20px 25px;
            margin: 25px 0;
            border-radius: 0 12px 12px 0;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
        }
        
        .challenge-box h3 {
            color: var(--accent-color-2);
            margin-bottom: 12px;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
        }
        
        .challenge-box h3:before {
            content: "\f071";
            font-family: "Font Awesome 5 Free";
            font-weight: 900;
            margin-right: 10px;
            font-size: 1.1rem;
        }
        
        .solution-box {
            background-color: rgba(91, 192, 222, 0.08);
            border-left: 4px solid var(--accent-color-3);
            padding: 20px 25px;
            margin: 25px 0;
            border-radius: 0 12px 12px 0;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
        }
        
        .solution-box h3 {
            color: var(--accent-color-3);
            margin-bottom: 12px;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
        }
        
        .solution-box h3:before {
            content: "\f0eb";
            font-family: "Font Awesome 5 Free";
            font-weight: 900;
            margin-right: 10px;
            font-size: 1.1rem;
        }
        
        .tech-stack {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 25px;
        }
        
        .tech-item {
            background-color: rgba(52, 152, 219, 0.1);
            border-radius: 30px;
            padding: 8px 16px;
            font-size: 0.9rem;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: background-color 0.2s, transform 0.2s;
        }
        
        .tech-item:hover {
            background-color: rgba(52, 152, 219, 0.2);
            transform: translateY(-3px);
        }
        
        .tech-icon {
            font-size: 1.1rem;
            color: var(--primary-color);
        }
        
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 40px auto;
        }
        
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background: linear-gradient(to bottom, rgba(4, 170, 109, 0.7), rgba(4, 170, 109, 0.2));
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
            border-radius: 3px;
        }
        
        .timeline-container {
            padding: 10px 40px;
            position: relative;
            background-color: inherit;
            width: 50%;
        }
        
        .timeline-container::after {
            content: '';
            position: absolute;
            width: 25px;
            height: 25px;
            right: -13px;
            background-color: var(--panel-bg);
            border: 4px solid var(--primary-color);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
            box-shadow: 0 0 0 4px rgba(4, 170, 109, 0.2);
        }
        
        .left {
            left: 0;
        }
        
        .right {
            left: 50%;
        }
        
        .left::before {
            content: " ";
            height: 0;
            position: absolute;
            top: 22px;
            width: 0;
            z-index: 1;
            right: 30px;
            border: medium solid var(--card-bg);
            border-width: 10px 0 10px 10px;
            border-color: transparent transparent transparent var(--card-bg);
        }
        
        .right::before {
            content: " ";
            height: 0;
            position: absolute;
            top: 22px;
            width: 0;
            z-index: 1;
            left: 30px;
            border: medium solid var(--card-bg);
            border-width: 10px 10px 10px 0;
            border-color: transparent var(--card-bg) transparent transparent;
        }
        
        .right::after {
            left: -16px;
        }
        
        .timeline-content {
            padding: 25px;
            background-color: var(--card-bg);
            position: relative;
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s, box-shadow 0.3s;
            border-left: 3px solid var(--primary-color);
        }
        
        .timeline-content:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
        }
        
        .timeline-date {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            font-weight: bold;
            padding: 5px 15px;
            border-radius: 20px;
            margin-bottom: 15px;
            box-shadow: 0 3px 8px rgba(4, 170, 109, 0.3);
            font-size: 0.9rem;
        }
        
        .timeline-title {
            margin-bottom: 15px;
            color: var(--accent-color-2);
            font-size: 1.3rem;
        }
        
        .features-list {
            margin-bottom: 25px;
            padding-left: 20px;
        }

        .quote-box {
            font-style: italic;
            padding: 20px;
            border-radius: 8px;
            background-color: rgba(52, 152, 219, 0.1);
            margin: 20px 0;
            position: relative;
        }
        
        .quote-box::before {
            content: '"';
            font-size: 4rem;
            color: var(--primary-color);
            opacity: 0.2;
            position: absolute;
            top: -15px;
            left: 10px;
            font-family: Georgia, serif;
        }
        
        .quote-content {
            position: relative;
            z-index: 1;
        }
        
        .comparison-container {
            display: flex;
            margin-top: 30px;
            gap: 20px;
            flex-wrap: wrap;
        }

        .comparison-column {
            flex: 1;
            min-width: 300px;
            background-color: rgba(52, 152, 219, 0.05);
            border-radius: 8px;
            padding: 20px;
        }

        .comparison-title {
            text-align: center;
            color: var(--primary-color);
            margin-bottom: 15px;
            padding-bottom: 5px;
            border-bottom: 1px solid var(--primary-color);
        }

        .comparison-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 8px;
            margin-bottom: 15px;
        }

        .comparison-list {
            list-style-type: none;
            padding: 0;
        }

        .comparison-list li {
            padding: 8px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
        }

        .comparison-list li:last-child {
            border-bottom: none;
        }

        .comparison-list li i {
            color: var(--primary-color);
            margin-right: 10px;
        }
        
        .stats-container {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 30px;
        }
        
        .stat-card {
            flex: 1;
            min-width: 200px;
            background-color: var(--card-bg);
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s, box-shadow 0.3s;
            position: relative;
            overflow: hidden;
            z-index: 1;
        }
        
        .stat-card:before {
            content: '';
            position: absolute;
            width: 150%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(4, 170, 109, 0.1), transparent);
            top: 0;
            left: -150%;
            transform: skewX(-30deg);
            transition: 0.75s;
            z-index: -1;
        }
        
        .stat-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        
        .stat-card:hover:before {
            left: 100%;
        }
        
        .stat-number {
            font-size: 3rem;
            font-weight: bold;
            color: var(--primary-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .stat-number:after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            width: 40px;
            height: 3px;
            background-color: var(--accent-color-2);
            transform: translateX(-50%);
        }
        
        .stat-label {
            color: var(--text-color);
            font-size: 1rem;
            font-weight: 500;
            opacity: 0.8;
        }
        
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes slideInRight {
            from {
                opacity: 0;
                transform: translateX(50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }
        
        @keyframes slideInLeft {
            from {
                opacity: 0;
                transform: translateX(-50px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }
        
        .section {
            margin-bottom: 80px;
            animation: fadeIn 0.8s ease-out forwards;
        }
        
        @media (max-width: 768px) {
            main {
                margin: 30px auto;
                padding: 0 15px;
            }
            
            .section-content {
                padding: 20px;
            }
            
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            
            .image-gallery,
            .measurement-gallery {
                grid-template-columns: 1fr;
            }
            
            .developer-card {
                flex-direction: column;
                text-align: center;
                padding: 20px;
            }
            
            .social-links {
                justify-content: center;
            }
            
            .comparison-container {
                flex-direction: column;
            }
            
            .comparison-column {
                min-width: auto;
            }
            
            .timeline::after {
                left: 31px;
            }
            
            .timeline-container {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            
            .timeline-container::before {
                left: 60px;
                border: medium solid var(--card-bg);
                border-width: 10px 10px 10px 0;
                border-color: transparent var(--card-bg) transparent transparent;
            }
            
            .left::after, .right::after {
                left: 15px;
            }
            
            .right {
                left: 0%;
            }
        }
        
        @media (max-width: 480px) {
           
            .section-title {
                font-size: 1.5rem;
            }
        }