/* Root variables */
        :root {
            --primary-color: #333333; /* Dark grey */
            --secondary-color: #ffffff; /* White */
            --light-grey: #f0f0f0;
            --accent-color: #666666; /* Medium grey for accents */
        }

        /* Reset and base styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body, html {
            height: 100%;
            font-family: 'Roboto', sans-serif;
            scroll-behavior: smooth;
            color: var(--primary-color);
            overflow: hidden; /* Prevent default scroll */
        }

        /* Sections */
        .section {
            position: relative;
            width: 100%;
            height: 100vh;
            padding: 60px 50px;
            box-sizing: border-box;
            display: flex;
            flex-direction: column;
            align-items: center;
            overflow: hidden;
            background-color: var(--secondary-color);
        }

        .section-heading {
            font-size: 2.5em;
            font-weight: bold;
            margin-bottom: 5px;
            text-align: center;
            color: var(--primary-color);
            text-transform: uppercase;
        }

        .content {
            width: 100%;
            max-width: 1000px;
            margin: 0 auto;
            text-align: center;
        }

        /* About Me Section */
        .about-card {
            background-color: var(--secondary-color);
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            display: flex;
            align-items: center;
            padding: 30px;
            max-width: 1000px;
            margin: 0 auto;
            position: relative;
        }

        .about-card::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 5px;
            background: var(--primary-color);
            bottom: 0;
            left: 0;
            border-radius: 0 0 15px 15px;
        }

        .about-image-container {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .about-image {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            object-fit: cover;
        }

        .about-text {
            flex: 2;
            padding-left: 30px;
            text-align: left;
        }

        .about-text p {
            margin-bottom: 15px;
        }

        @media (max-width: 768px) {
            .about-card {
                flex-direction: column;
                padding: 20px;
            }

            .about-text {
                padding-left: 0;
                margin-top: 20px;
            }

            .about-image {
                width: 150px;
                height: 150px;
            }
        }

        /* Timeline for sections with multiple items */
        .timeline {
            position: relative;
            margin: 50px 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--accent-color);
            transform: translateX(-50%);
        }

        .timeline-item {
            position: relative;
            width: 45%;
            padding: 2px;
            box-sizing: border-box;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            left: 55%;
            text-align: left;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            top: 20px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--secondary-color);
            border: 3px solid var(--accent-color);
        }

        .timeline-item:nth-child(odd)::before {
            right: -63px;
        }

        .timeline-item:nth-child(even)::before {
            left: -63px;
        }

        .timeline-item h3 {
            font-size: 1.5em;
            color: var(--primary-color);
            margin-bottom: 10px;
        }

        .timeline-item p {
            font-size: 1em;
            line-height: 1.6;
            color: var(--primary-color);
        }

        /* Modern Card Design for sections with single items */
        .card-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 30px;
            margin-top: 40px;
        }

        .card {
            background-color: var(--secondary-color);
            width: 100%;
            max-width: 800px;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
            text-align: left;
            position: relative;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .card::after {
            content: '';
            position: absolute;
            width: 100%;
            height: 5px;
            background: var(--primary-color);
            bottom: 0;
            left: 0;
            border-radius: 0 0 15px 15px;
        }

        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.15);
        }

        .card h3 {
            font-size: 1.8em;
            color: var(--primary-color);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
        }

        .card h3 .material-icons {
            font-size: 1.2em;
            margin-right: 10px;
            color: var(--accent-color);
        }

        .card p, .card ul {
            font-size: 1em;
            line-height: 1.6;
            color: var(--primary-color);
        }

        .card ul {
            list-style: none;
            padding: 0;
        }

        .card ul li {
            margin-bottom: 10px;
            position: relative;
            padding-left: 30px;
        }

        .card ul li::before {
            content: 'keyboard_arrow_right';
            position: absolute;
            left: 0;
            color: var(--accent-color);
            font-family: 'Material Icons';
            font-size: 1.2em;
            line-height: 1;
        }

        /* Side navigation */
        .side-nav {
            position: fixed;
            left: 20px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1000;
            width: 60px;
            background-color: var(--secondary-color);
            border-radius: 30px;
            display: flex;
            flex-direction: column;
            transition: width 0.3s;
            overflow: hidden;
            cursor: pointer;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
            padding-top: 20px;
            padding-bottom: 20px;
            padding-left: 10px;
        }

        .side-nav.expanded {
            width: 200px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
            cursor: pointer;
            padding-left: 15px;
        }

        .nav-dot {
            width: 15px;
            height: 15px;
            background-color: grey;
            border-radius: 50%;
            transition: background-color 0.3s;
            flex-shrink: 0;
        }

        .nav-item.active .nav-dot {
            background-color: var(--primary-color);
        }

        .nav-label {
            display: none;
            margin-left: 10px;
            color: var(--primary-color);
            white-space: nowrap;
        }

        .side-nav.expanded .nav-label {
            display: inline-block;
        }

        /* Buttons */
        .btn {
            background-color: var(--primary-color);
            color: var(--secondary-color);
            border: none;
            padding: 12px 25px;
            font-size: 1em;
            cursor: pointer;
            border-radius: 50px;
            transition: background-color 0.3s, transform 0.3s;
            text-decoration: none;
            display: inline-block;
            margin-top: 20px;
        }

        .btn:hover {
            background-color: var(--accent-color);
            transform: translateY(-5px);
        }

        /* Responsive adjustments */
        @media (max-width: 768px) {
            .section-heading {
                font-size: 2em;
            }

            .timeline-item {
                width: 100%;
                left: 40px !important;
                margin-bottom: 30px;
                text-align: left;
            }

            .timeline::before {
                left: 20px;
            }

            .timeline-item::before {
                left: -33px !important;
            }

            .side-nav {
                left: 4px;
                width: 50px;
                height: auto;
                padding-top: 20px;
                padding-bottom: 20px;
                padding-left: 5px;
            }

            .nav-dot {
                width: 12px;
                height: 12px;
            }

            .nav-item {
                margin-bottom: 15px;
            }

            .timeline-item h3 {
                font-size: 1.3em;
                color: var(--primary-color);
                margin-bottom: 10px;
            }

            .timeline-item p {
                font-size: 0.8em;
                line-height: 1.6;
                color: var(--primary-color);
            }

            .timeline-item:nth-child(odd)::before {
                left: -10px;
            }

            .timeline-item:nth-child(even)::before {
                left: -10px;
            }

            .timeline-item:nth-child(odd) {
                left: 55%;
                text-align: left;
            }

            .timeline-item:nth-child(even) {
                left: 55%;
                text-align: left;
            }

        }

        @media (max-width: 480px) {
            .content {
                width: 95%;
            }

            .about-image {
                width: 120px;
                height: 120px;
            }
        }

        /* Animations */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 1s forwards;
        }

        @keyframes fadeInUp {
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }