* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --primary-bg: #0f172a;
            --secondary-bg: #1e293b;
            --card-bg: rgba(30, 41, 59, 0.8);
            --text-primary: #f8fafc;
            --text-secondary: #94a3b8;
            --accent-blue: #3b82f6;
            --accent-green: #22c55e;
            --accent-purple: #a855f7;
            --accent-orange: #f97316;
            --border-color: rgba(51, 65, 85, 0.5);
            
            /* Responsive spacing variables */
            --container-padding: 2rem;
            --card-padding: 2.5rem;
            --section-spacing: 4rem;
            --element-spacing: 1.5rem;
            --header-spacing: 4rem;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, var(--primary-bg) 0%, var(--secondary-bg) 100%);
            color: var(--text-primary);
            min-height: 100vh;
            overflow-x: hidden;
        }

        /* Animated Background */
        .bg-animation {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -1;
            opacity: 0.1;
        }

        .particle {
            position: absolute;
            background: var(--accent-blue);
            border-radius: 50%;
            animation: float 6s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(180deg); }
        }

        /* Header Section */
        .header {
            text-align: center;
            padding: var(--header-spacing) var(--container-padding);
            position: relative;
        }

        .title {
            font-size: clamp(2.5rem, 8vw, 4rem);
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 1rem;
            animation: slideInDown 1s ease-out;
            line-height: 1.1;
        }

        .subtitle {
            font-size: clamp(1rem, 3vw, 1.2rem);
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 600px;
            margin: 0 auto 3rem;
            animation: slideInUp 1s ease-out 0.3s both;
            padding: 0 1rem;
        }

        /* Statistics Section */
        .stats-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: clamp(1rem, 3vw, 2rem);
            max-width: 800px;
            margin: 0 auto var(--section-spacing);
            padding: 0 var(--container-padding);
            animation: slideInUp 1s ease-out 0.6s both;
        }

        .stat-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: clamp(1rem, 3vw, 2rem);
            text-align: center;
            backdrop-filter: blur(10px);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        }

        .stat-number {
            font-size: clamp(1.8rem, 5vw, 2.5rem);
            font-weight: 700;
            color: var(--accent-blue);
            margin-bottom: 0.5rem;
        }

        .stat-label {
            color: var(--text-secondary);
            font-size: clamp(0.7rem, 2vw, 0.9rem);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* Controls Section */
        .controls {
            max-width: 800px;
            margin: 0 auto 3rem;
            padding: 0 var(--container-padding);
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
            justify-content: space-between;
        }

        .search-container {
            position: relative;
            flex: 1;
            min-width: 200px;
        }

        .search-input {
            width: 100%;
            padding: 0.8rem 1rem 0.8rem 3rem;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            color: var(--text-primary);
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }

        .search-input:focus {
            outline: none;
            border-color: var(--accent-blue);
        }

        .search-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-secondary);
        }

        .filter-buttons {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
            justify-content: center;
        }

        .filter-btn {
            padding: 0.6rem 1.2rem;
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .filter-btn:hover,
        .filter-btn.active {
            background: var(--accent-blue);
            color: white;
            border-color: var(--accent-blue);
        }

        .view-toggle {
            display: flex;
            gap: 0.5rem;
        }

        .view-btn {
            padding: 0.6rem;
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .view-btn:hover,
        .view-btn.active {
            background: var(--accent-blue);
            color: white;
            border-color: var(--accent-blue);
        }

        /* Timeline Container */
        .container {
            max-width: 1000px;
            margin: 0 auto;
            padding: 0 var(--container-padding) 4rem;
        }

        .timeline {
            position: relative;
            padding-left: 2rem;
            transition: all 0.3s ease;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 1rem;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, var(--accent-blue), var(--accent-purple));
            border-radius: 2px;
        }

        /* Grid View */
        .grid-view {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            padding: 0;
        }

        .grid-view::before {
            display: none;
        }

        .grid-view .achievement::before {
            display: none;
        }

        /* Achievement Cards */
        .achievement {
            position: relative;
            margin-bottom: 3rem;
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: var(--card-padding);
            backdrop-filter: blur(10px);
            transition: all 0.5s ease;
            opacity: 0;
            transform: translateY(50px);
            cursor: pointer;
        }

        .achievement.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .achievement:hover {
            transform: translateY(-5px);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
            border-color: var(--accent-blue);
        }

        .achievement::before {
            content: '';
            position: absolute;
            left: -2.8rem;
            top: 2.5rem;
            width: 16px;
            height: 16px;
            background: var(--accent-blue);
            border-radius: 50%;
            border: 4px solid var(--primary-bg);
            box-shadow: 0 0 0 3px var(--accent-blue);
            transition: all 0.3s ease;
        }

        .achievement:hover::before {
            transform: scale(1.2);
            box-shadow: 0 0 0 6px rgba(59, 130, 246, 0.3);
        }

        .achievement-header {
            display: flex;
            align-items: flex-start;
            justify-content: space-between;
            margin-bottom: var(--element-spacing);
            flex-wrap: wrap;
            gap: 1rem;
        }

        .achievement-left {
            display: flex;
            align-items: flex-start;
            gap: 1.5rem;
            flex: 1;
        }

        .achievement-icon {
            width: clamp(40px, 10vw, 50px);
            height: clamp(40px, 10vw, 50px);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: clamp(1.2rem, 3vw, 1.5rem);
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .achievement:hover .achievement-icon {
            transform: rotate(5deg) scale(1.1);
        }

        .achievement-info h3 {
            font-size: clamp(1.2rem, 3vw, 1.4rem);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.8rem;
            line-height: 1.3;
        }

        .achievement-meta {
            display: flex;
            align-items: center;
            gap: clamp(0.8rem, 2vw, 1.5rem);
            font-size: clamp(0.8rem, 2vw, 0.9rem);
            color: var(--text-secondary);
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }

        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            white-space: nowrap;
        }

        .achievement-description {
            color: #cbd5e1;
            line-height: 1.7;
            margin-bottom: 2rem;
            font-size: clamp(0.9rem, 2vw, 1rem);
        }

        .key-highlights h4 {
            font-size: clamp(1rem, 2.5vw, 1.1rem);
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .highlights-list {
            list-style: none;
            margin-bottom: 1.5rem;
        }

        .highlights-list li {
            color: var(--text-secondary);
            margin-bottom: 0.6rem;
            padding-left: 1.5rem;
            position: relative;
            transition: color 0.3s ease;
            font-size: clamp(0.85rem, 2vw, 0.95rem);
        }

        .highlights-list li::before {
            content: '✓';
            color: var(--accent-green);
            position: absolute;
            left: 0;
            font-weight: bold;
        }

        .achievement:hover .highlights-list li {
            color: #cbd5e1;
        }

        .skills-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }

        .skill-tag {
            padding: 0.3rem 0.8rem;
            background: rgba(59, 130, 246, 0.1);
            border: 1px solid rgba(59, 130, 246, 0.3);
            border-radius: 20px;
            font-size: clamp(0.7rem, 2vw, 0.8rem);
            color: #60a5fa;
        }

        .achievement-tag {
            padding: clamp(0.4rem, 1vw, 0.5rem) clamp(0.7rem, 2vw, 1rem);
            border-radius: 8px;
            font-size: clamp(0.75rem, 2vw, 0.85rem);
            font-weight: 600;
            white-space: nowrap;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .tag-internship {
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0.1));
            color: #60a5fa;
            border: 1px solid rgba(59, 130, 246, 0.3);
        }

        .tag-hackathon {
            background: linear-gradient(135deg, rgba(34, 197, 94, 0.2), rgba(34, 197, 94, 0.1));
            color: #4ade80;
            border: 1px solid rgba(34, 197, 94, 0.3);
        }

        .tag-contribution {
            background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(168, 85, 247, 0.1));
            color: #c084fc;
            border: 1px solid rgba(168, 85, 247, 0.3);
        }

        .tag-academic {
            background: linear-gradient(135deg, rgba(249, 115, 22, 0.2), rgba(249, 115, 22, 0.1));
            color: #fb923c;
            border: 1px solid rgba(249, 115, 22, 0.3);
        }

        /* Modal */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.8);
            z-index: 1000;
            backdrop-filter: blur(5px);
        }

        .modal.active {
            display: flex;
            align-items: center;
            justify-content: center;
            animation: fadeIn 0.3s ease;
        }

        .modal-content {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            padding: clamp(1.5rem, 5vw, 3rem);
            width: clamp(300px, 90%, 600px);
            max-height: 80vh;
            overflow-y: auto;
            position: relative;
            animation: slideInScale 0.3s ease;
        }

        .modal-close {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: none;
            border: none;
            color: var(--text-secondary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 0.5rem;
            border-radius: 50%;
            transition: all 0.3s ease;
            z-index: 10;
        }

        .modal-close:hover {
            background: rgba(255, 255, 255, 0.1);
            color: var(--text-primary);
        }

        /* Floating Action Button */
        .fab {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: clamp(45px, 12vw, 60px);
            height: clamp(45px, 12vw, 60px);
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
            border: none;
            border-radius: 50%;
            color: white;
            font-size: clamp(1.2rem, 3vw, 1.5rem);
            cursor: pointer;
            box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
            transition: all 0.3s ease;
            z-index: 100;
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            pointer-events: none;
        }

        .fab:hover {
            transform: scale(1.1);
            box-shadow: 0 15px 40px rgba(59, 130, 246, 0.4);
        }

        /* Progress Bar */
        .progress-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: rgba(255, 255, 255, 0.1);
            z-index: 1000;
        }

        .progress-bar {
            height: 100%;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
            width: 0%;
            transition: width 0.3s ease;
        }

        /* Mobile Navigation */
        .mobile-nav {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: var(--card-bg);
            backdrop-filter: blur(10px);
            border-top: 1px solid var(--border-color);
            padding: 0.8rem;
            display: none;
            justify-content: space-around;
            z-index: 90;
        }

        .mobile-nav-btn {
            background: transparent;
            border: none;
            color: var(--text-secondary);
            font-size: 1.2rem;
            padding: 0.5rem;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.3rem;
        }

        .mobile-nav-btn.active {
            color: var(--accent-blue);
        }

        .mobile-nav-label {
            font-size: 0.7rem;
        }

        /* Animations */
        @keyframes slideInDown {
            from {
                opacity: 0;
                transform: translateY(-50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes slideInUp {
            from {
                opacity: 0;
                transform: translateY(50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes slideInScale {
            from {
                opacity: 0;
                transform: scale(0.8);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        /* Hidden class for filtering */
        .hidden {
            display: none !important;
        }

        /* Responsive Design */
        @media only screen and (max-width: 480px) {
            :root {
                --container-padding: 1rem;
                --card-padding: 1.5rem;
                --section-spacing: 3rem;
                --element-spacing: 1rem;
                --header-spacing: 3rem;
            }

            .controls {
                flex-direction: column;
                gap: 1.5rem;
            }

            .filter-buttons {
                width: 100%;
                overflow-x: auto;
                padding-bottom: 0.5rem;
                justify-content: flex-start;
            }

            .view-toggle {
                display: none;
            }

            .timeline {
                padding-left: 1.5rem;
            }

            .timeline::before {
                left: 0.75rem;
            }

            .achievement::before {
                left: -2rem;
                width: 12px;
                height: 12px;
            }

            .mobile-nav {
                display: flex;
            }

            .fab {
                bottom: 5rem;
                right: 1rem;
            }
        }

        @media only screen and (min-width: 481px) and (max-width: 768px) {
            .controls {
                flex-direction: column;
                gap: 1.5rem;
            }

            .mobile-nav {
                display: flex;
            }

            .fab {
                bottom: 5rem;
            }
        }