/* --- CSS RESET & VARIABLES --- */
        :root {
            --primary-color: #4A69E2; /* A vibrant blue */
            --primary-dark: #3b54b5;
            --secondary-color: #1DE9B6; /* A bright teal/mint */
            --dark-text: #212529;
            --light-text: #6C757D;
            --bg-light: #F8F9FA;
            --bg-white: #FFFFFF;
            --border-color: #DEE2E6;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.1);
        }

        *, *::before, *::after {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: 'Poppins', sans-serif;
            background-color: var(--bg-white);
            color: var(--dark-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
         /* Main Container for the Header Elements */
        .header-container {
            width: 100%;
        }

        /* Top Banner with Title */
        .top-banner {
            background-color: #e0e0f4; /* Light lavender background */
            padding: 25px 0;
            text-align: center;
        }

        .top-banner h1 {
            margin: 0;
            color: #191970; /* Dark blue text color */
            font-size: 28px;
            font-weight: 500;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* --- NAVBAR --- */
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(10px);
            padding: 0rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            transition: background-color 0.3s ease;
        }
        
        .navbar .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }

        .navbar .nav-links {
            list-style: none;
            display: flex;
            margin: 0;
            padding: 0;
            gap: 2.5rem;
        }

        .navbar .nav-links a {
            color: var(--dark-text);
            text-decoration: none;
            font-weight: 500;
            position: relative;
            transition: color 0.3s ease;
        }
        
        .navbar .nav-links a:hover {
            color: var(--primary-color);
        }

        /* Hamburger Menu (Mobile) */
        #menu-toggle { display: none; }
        .hamburger-menu { display: none; }


        /* --- HERO SECTION --- */
        .hero-section {
            background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('images/simulation.jpg');
            background-size: cover;
            background-position: center;
            padding: 120px 20px;
            text-align: center;
            color: var(--bg-white);
        }

        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin: 0 0 1rem 0;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }

        .hero-section p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2rem auto;
            font-weight: 300;
        }

        .cta-button {
            background-color: var(--primary-color);
            color: white;
            padding: 14px 30px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: background-color 0.3s ease, transform 0.2s ease;
            display: inline-block;
        }

        .cta-button:hover {
            background-color: var(--primary-dark);
            transform: translateY(-3px);
        }

        /* --- SECTION TITLES --- */
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            font-weight: 600;
            color: var(--dark-text);
            margin-bottom: 1rem;
        }

        .section-subtitle {
            text-align: center;
            font-size: 1.1rem;
            color: var(--light-text);
            max-width: 600px;
            margin: 0 auto 50px auto;
        }

        /* --- FEATURES SECTION --- */
        .features-section {
             background-color: var(--bg-light);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        .feature-box {
            background-color: var(--bg-white);
            padding: 30px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .feature-box:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .feature-box img {
            width: 50px;
            height: 50px;
            margin-bottom: 20px;
            filter: grayscale(100%) contrast(0%) brightness(0) invert(42%) sepia(85%) saturate(2250%) hue-rotate(218deg) brightness(95%) contrast(87%);
        }
        .feature-box h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 0 0 10px 0;
        }
        .feature-box p {
            font-size: 0.95rem;
            color: var(--light-text);
            margin: 0;
        }
        
        /* --- INSTRUCTIONS SECTION --- */
        .instructions-wrapper {
            max-width: 850px;
            margin: 0 auto;
            background-color: var(--bg-white);
            border-radius: 16px;
            box-shadow: var(--shadow);
            padding: 50px;
        }
        
        .instructions-wrapper h2 {
            text-align: center;
            font-size: 2rem;
            margin: 0 0 40px 0;
        }

        .instructions-list {
            list-style: none;
            padding: 0;
            counter-reset: step-counter;
        }

        .instructions-list > li {
            counter-increment: step-counter;
            margin-bottom: 30px;
            position: relative;
            padding-left: 65px;
        }
        
        .instructions-list > li::before {
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 0;
            width: 45px;
            height: 45px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 12px;
            display: flex;
            justify-content: center;
            align-items: center;
            font-weight: 700;
            font-size: 1.4rem;
        }
        
        .instructions-list li strong {
            display: block;
            font-size: 1.2rem;
            color: var(--dark-text);
            margin-bottom: 8px;
            font-weight: 600;
        }

        .instructions-list ul {
            list-style: none;
            padding-left: 0;
            margin: 10px 0 0 0;
        }
        
        .instructions-list ul li {
            margin-bottom: 8px;
            padding-left: 25px;
            position: relative;
            color: var(--light-text);
        }

        .instructions-list ul li::before {
            content: '\f00c'; /* Font Awesome check icon */
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            top: 2px;
            color: var(--secondary-color);
        }

        /* --- PROJECTS SECTION --- */
        .projects-section {
            background-color: var(--bg-light);
        }

        .card-grid-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }

        .project-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            box-shadow: var(--shadow);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .project-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-hover);
        }

        .card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .card-content {
            padding: 25px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .card-title {
            margin: 0 0 auto 0; /* Pushes footer down */
            font-size: 1.2rem;
            font-weight: 600;
            line-height: 1.4;
            color: var(--dark-text);
        }
        
        .card-footer {
            padding: 20px 25px;
            border-top: 1px solid var(--border-color);
        }

        .diy-link {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--primary-color);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .diy-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* --- PAGINATION --- */
        .pagination-wrapper {
            display: flex;
            justify-content: center;
            margin-top: 50px;
        }

        .pagination {
            display: flex;
            gap: 10px;
        }

        .pagination a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            text-decoration: none;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--primary-color);
            background-color: var(--bg-white);
            font-weight: 500;
            transition: all 0.2s ease;
        }

        .pagination a:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .pagination a.active {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            cursor: default;
        }
        
               /* Main footer wrapper */
.site-footer {
    background-color: #f1f1f1;
    padding: 50px 0 0 0;
    border-top: 1px solid #e0e0e0;
    font-size: 15px;
}

/* Container for the 3-column layout */
.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    gap: 30px; /* Space between columns */
}

/* Styling for each column */
.footer-column {
    padding: 0 20px;
}

/* Specific styling for the first (wider) column */
.about-column {
    flex: 2; /* Takes up twice the space of the other columns */
    padding-left: 0;
}

.links-column, .contact-column {
    flex: 1; /* Each takes up 1 part of the available space */
    border-left: 1px solid #e0e0e0; /* The vertical separator line */
}

.footer-logo {
    max-width: 80px;
    margin-bottom: 20px;
}

.footer-column h3 {
    font-size: 24px;
    color: #333;
    margin-top: 0;
    margin-bottom: 20px;
    font-weight: 400; /* Lighter font weight like in the image */
}

/* Links List Styling */
.links-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.links-column li {
    margin-bottom: 10px;
}

.links-column a {
    color: #4a4a4a;
    text-decoration: none;
    transition: color 0.3s ease;
}

.links-column a:hover {
    color: #007bff; /* A nice hover color */
}

/* Social Icons */
.social-icons {
    margin-top: 20px;
}

.social-icons a {
    color: #333;
    font-size: 16px;
    margin-right: 15px;
    text-decoration: none;
    transition: color 0.3s ease;
}

.social-icons a:hover {
    color: #007bff;
}

/* Sub-footer (Copyright bar) */
.footer-sub {
    background-color: #f5f5f5;
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    border-top: 1px solid #e0e0e0;
    font-size: 14px;
    color: #666;
}

.footer-sub strong {
    color: #333;
}



/* --- Responsive Design for Mobile --- */
@media (max-width: 768px) {
    .footer-container {
        flex-direction: column; /* Stack columns vertically */
        text-align: center;
    }

    /* Remove vertical lines and add horizontal ones on mobile */
    .links-column, .contact-column {
        border-left: none;
        border-top: 1px solid #e0e0e0;
        padding-top: 30px;
        padding-left: 0; /* Reset padding */
        padding-right: 0; /* Reset padding */
    }

    .footer-logo {
        /* Center the logo when stacked */
        margin-left: auto;
        margin-right: auto;
    }

    .social-icons {
        /* Center the icons */
        display: flex;
        justify-content: center;
        gap: 20px;
    }
     .social-icons a {
        margin-right: 0;
    }
}
        @media (max-width: 768px) {
            .hero-section h1 { font-size: 2.5rem; }
            .hero-section p { font-size: 1.1rem; }
            section { padding: 60px 0; }

            /* Mobile Navbar */
            .navbar .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                padding: 1rem 0;
                box-shadow: 0 10px 10px rgba(0,0,0,0.05);
                text-align: center;
                gap: 0;
            }
             .navbar .nav-links li {
                padding: 1rem;
             }
            #menu-toggle:checked ~ .nav-links {
                display: flex;
            }
            .hamburger-menu {
                display: flex;
                flex-direction: column;
                gap: 5px;
                cursor: pointer;
            }
            .hamburger-menu .bar {
                width: 25px;
                height: 3px;
                background-color: var(--dark-text);
                transition: all 0.3s ease;
            }
            /* Hamburger animation */
            #menu-toggle:checked ~ .hamburger-menu .bar:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }
            #menu-toggle:checked ~ .hamburger-menu .bar:nth-child(2) {
                opacity: 0;
            }
            #menu-toggle:checked ~ .hamburger-menu .bar:nth-child(3) {
                transform: rotate(-45deg) translate(7px, -6px);
            }
            
            .instructions-wrapper { padding: 30px 20px; }

            .footer-container {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer-logo, .social-icons {
                margin-left: auto;
                margin-right: auto;
                justify-content: center;
            }
        }