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

        :root {
            --primary-dark: #0a192f;
            --secondary-dark: #112240;
            --accent: #64ffda;
            --accent-light: #8afff0;
            --text-light: #e6f1ff;
            --text-dark: #0a192f;
            --heading-dark: #0a192f;
            --timeline-color: #64ffda;
            --timeline-light: #0a5c9c;
            --card-bg-dark: rgba(17, 34, 64, 0.85);
            --card-bg-light: rgba(255, 255, 255, 0.95);
            --bg-dark: linear-gradient(135deg, #0a192f 0%, #020c1b 100%);
            --bg-light: linear-gradient(135deg, #f0f7ff 0%, #e1edff 100%);
            --shadow-dark: 0 10px 30px rgba(2, 12, 27, 0.7);
            --shadow-light: 0 10px 30px rgba(0, 40, 100, 0.1);
            --toggle-bg-dark: rgba(17, 34, 64, 0.8);
            --toggle-bg-light: rgba(230, 241, 255, 0.8);
            --glow: 0 0 15px rgba(100, 255, 218, 0.4);
        }

        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            transition: background 0.8s cubic-bezier(0.19, 1, 0.22, 1);
            min-height: 100vh;
            background: var(--bg-dark);
            color: var(--text-light);
            overflow-x: hidden;
            padding: 1rem;
        }

        body.light-mode {
            background: var(--bg-light);
            color: var(--text-dark);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1rem;
        }

        header {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
            padding-top: 1rem;
        }

        h1 {
            font-family: 'Plus Jakarta Sans', sans-serif;
            font-size: 2.8rem;
            margin-bottom: 1rem;
            background: linear-gradient(90deg, var(--accent), #4db5ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-fill-color: transparent;
            font-weight: 800;
            letter-spacing: -1px;
            margin-top: 1.5rem;
        }

        .light-mode h1 {
            background: linear-gradient(90deg, #0a7c6c, #0a5c9c);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-fill-color: transparent;
        }

        .subtitle {
            font-size: 1.2rem;
            opacity: 0.85;
            margin: 1.2rem auto 2.5rem;
            font-weight: 300;
            max-width: 700px;
            line-height: 1.7;
            font-family: 'Inter', sans-serif;
            padding: 0 1rem;
        }

        .light-mode .subtitle {
            color: #0a192f;
        }

        /* Theme Toggle */
        .theme-toggle {
            position: relative;
            background: var(--toggle-bg-dark);
            border: 1px solid rgba(100, 255, 218, 0.3);
            border-radius: 30px;
            padding: 0.5rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 80px;
            height: 40px;
            transition: all 0.4s ease;
            backdrop-filter: blur(5px);
            box-shadow: var(--glow);
            margin: 0 auto 2rem;
        }

        .light-mode .theme-toggle {
            background: var(--toggle-bg-light);
            border: 1px solid rgba(0, 60, 120, 0.2);
            box-shadow: 0 0 15px rgba(0, 80, 200, 0.2);
        }

        .theme-toggle i {
            font-size: 1.2rem;
            padding: 0.5rem;
            border-radius: 50%;
            transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
        }

        .theme-toggle .fa-sun {
            color: #ffd700;
        }

        .theme-toggle .fa-moon {
            color: #64ffda;
        }

        .theme-toggle .fa-sun {
            opacity: 0;
            transform: translateX(30px) rotate(90deg);
        }

        .light-mode .theme-toggle .fa-sun {
            opacity: 1;
            transform: translateX(0) rotate(0);
        }

        .light-mode .theme-toggle .fa-moon {
            opacity: 0;
            transform: translateX(-30px) rotate(-90deg);
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding: 3rem 0;
        }

        /* Vertical line */
        .timeline::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 4px;
            background: linear-gradient(to bottom, var(--accent), transparent);
            border-radius: 2px;
            transform: translateX(-50%);
            z-index: 1;
            height: 0;
            transition: height 1.5s ease-out;
        }

        .light-mode .timeline::before {
            background: linear-gradient(to bottom, var(--timeline-light), transparent);
        }

        .timeline.animated::before {
            height: 100%;
        }

        /* Timeline entries */
        .timeline-entry {
            position: relative;
            margin-bottom: 4rem;
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            width: calc(50% - 40px);
        }

        .timeline-entry.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .timeline-entry:nth-child(odd) {
            left: 0;
        }

        .timeline-entry:nth-child(even) {
            left: calc(50% + 40px);
        }

        /* Timeline card */
        .timeline-card {
            background: var(--card-bg-dark);
            border-radius: 14px;
            padding: 1.8rem;
            position: relative;
            z-index: 2;
            border: 1px solid rgba(100, 255, 218, 0.15);
            backdrop-filter: blur(8px);
            transition: all 0.4s ease;
            box-shadow: var(--shadow-dark);
        }

        .light-mode .timeline-card {
            background: var(--card-bg-light);
            box-shadow: var(--shadow-light);
            border: 1px solid rgba(10, 92, 156, 0.1);
            color: #0a192f;
        }

        .timeline-card:hover {
            box-shadow: 0 15px 35px rgba(100, 255, 218, 0.25);
            border-color: rgba(100, 255, 218, 0.4);
            filter: brightness(1.1);
        }

        .light-mode .timeline-card:hover {
            box-shadow: 0 15px 35px rgba(10, 92, 156, 0.15);
            border-color: rgba(10, 92, 156, 0.3);
            filter: brightness(1.05);
        }

        /* Timeline circle - PERFECT ALIGNMENT */
        .timeline-entry::after {
            content: '';
            position: absolute;
            width: 24px;
            height: 24px;
            background: var(--accent);
            border-radius: 50%;
            top: 50%;
            transform: translateY(-50%);
            z-index: 3;
            box-shadow: var(--glow);
            transition: all 0.4s ease;
            border: 2px solid var(--secondary-dark);
        }

        .light-mode .timeline-entry::after {
            background: var(--timeline-light);
            border: 2px solid var(--bg-light);
            box-shadow: 0 0 12px rgba(10, 92, 156, 0.3);
        }

        .timeline-entry:hover::after {
            box-shadow: 0 0 0 8px rgba(100, 255, 218, 0.2);
            transform: translateY(-50%) scale(1.1);
        }

        .light-mode .timeline-entry:hover::after {
            box-shadow: 0 0 0 8px rgba(10, 92, 156, 0.15);
        }

        .timeline-entry:nth-child(odd)::after {
            right: -52px;
        }

        .timeline-entry:nth-child(even)::after {
            left: -52px;
        }

        /* Card content */
        .entry-title {
            font-size: 1.5rem;
            margin-bottom: 0.8rem;
            color: var(--accent);
            font-weight: 600;
            font-family: 'Inter', sans-serif;
        }

        .light-mode .entry-title {
            color: #0a5c9c;
        }

        .entry-org {
            display: inline-block;
            background: rgba(100, 255, 218, 0.15);
            color: var(--accent-light);
            padding: 0.4rem 1.2rem;
            border-radius: 30px;
            font-size: 0.9rem;
            margin-bottom: 0.8rem;
            font-weight: 500;
            backdrop-filter: blur(5px);
            transition: all 0.3s ease;
            font-family: 'Inter', sans-serif;
        }

        .light-mode .entry-org {
            background: rgba(10, 92, 156, 0.15);
            color: #0a5c9c;
        }

        .entry-date {
            display: block;
            font-size: 0.9rem;
            margin-bottom: 1rem;
            opacity: 0.85;
            font-weight: 500;
            position: relative;
            padding-left: 1.5rem;
            font-family: 'Inter', sans-serif;
        }

        .entry-date::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: var(--accent);
        }

        .light-mode .entry-date::before {
            background: #0a5c9c;
        }

        .entry-desc {
            font-size: 1rem;
            line-height: 1.7;
            opacity: 0.9;
            font-family: 'Inter', sans-serif;
        }

        /* Mobile view */
        @media (max-width: 900px) {
            .container {
                padding: 0.5rem;
            }
            
            .timeline::before {
                left: 20px;
            }

            .timeline-entry {
                width: calc(100% - 50px);
                margin-left: 50px;
                margin-bottom: 3.5rem;
            }

            .timeline-entry:nth-child(even),
            .timeline-entry:nth-child(odd) {
                left: 0;
            }

            .timeline-entry:nth-child(odd)::after,
            .timeline-entry:nth-child(even)::after {
                left: -40px;
                top: 40px;
                transform: translateY(-50%);
            }

            .theme-toggle {
                width: 75px;
                height: 38px;
                margin: 0 auto 1.5rem;
            }
            
            h1 {
                font-size: 2.2rem;
                margin-top: 1rem;
            }
            
            .subtitle {
                font-size: 1rem;
                margin: 1rem auto 2rem;
            }
            
            .timeline-card {
                padding: 1.5rem;
            }
            
            .entry-title {
                font-size: 1.3rem;
            }
        }

        /* Animations */
        @keyframes pulse {
            0% { box-shadow: 0 0 0 0 rgba(100, 255, 218, 0.7); }
            70% { box-shadow: 0 0 0 10px rgba(100, 255, 218, 0); }
            100% { box-shadow: 0 0 0 0 rgba(100, 255, 218, 0); }
        }

        .timeline-entry::after {
            animation: pulse 3s infinite;
        }

        footer {
            text-align: center;
            padding: 2rem 0 1rem;
            font-size: 0.95rem;
            opacity: 0.7;
            margin-top: 1rem;
            font-weight: 300;
            font-family: 'Inter', sans-serif;
        }

        /* Decorative elements */
        .bubble {
            position: absolute;
            border-radius: 50%;
            background: rgba(100, 255, 218, 0.1);
            z-index: -1;
            animation: float 8s ease-in-out infinite;
        }

        @keyframes float {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-12px); }
            100% { transform: translateY(0px); }
        }

        .bubble-1 {
            width: 180px;
            height: 180px;
            top: 10%;
            left: 5%;
        }

        .bubble-2 {
            width: 140px;
            height: 140px;
            bottom: 15%;
            right: 10%;
            animation-delay: 1s;
        }

        .bubble-3 {
            width: 100px;
            height: 100px;
            top: 40%;
            right: 20%;
            animation-delay: 0.5s;
        }

        .light-mode .bubble {
            background: rgba(10, 92, 156, 0.08);
        }