:root {
            --transition-speed: 0.3s;
            --font-main: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --line-height: 1.6;
            --space-unit: 1rem;
            --border-radius: 12px;
        }

        @media (prefers-color-scheme: light) {
            :root {
                --bg-color: #fcfcfc;
                --surface-color: #ffffff;
                --text-main: #2d3436;
                --text-muted: #636e72;
                --accent-color: #0984e3;
                --accent-soft: #e1f5fe;
                --border-color: #bebebe;
                --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            }
        }

        @media (prefers-color-scheme: dark) {
            :root {
                --bg-color: #121212;
                --surface-color: #1e1e1e;
                --text-main: #e0e0e0;
                --text-muted: #a0a0a0;
                --accent-color: #74b9ff;
                --accent-soft: #6f6f6f;
                --border-color: #2d2d2d;
                --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
            }
        }

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

        body {
            background-color: var(--bg-color);
            font-family: var(--font-main);
            line-height: var(--line-height);
            transition: background-color var(--transition-speed), color var(--transition-speed);
        }

        .intro, .team {
            max-width: 1000px;
            margin: 0 auto;
            padding: 2rem 1rem;
            color: var(--text-main);
        }

        .intro>section {
            margin-bottom: 3rem;
            line-height: 2;
            font-weight: 700;
            color: var(--text-main);
        }

        h1 {
            font-size: 500%;
        }
        h2 {
            font-size: 300%;
        }
        h3 {
            font-size: 200%;
        }
        h4 {
            font-size: 150%;
        }
        p {
            font-size: 120%;
        }

        .card {
            background-color: var(--surface-color);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 1.5rem;
            box-shadow: var(--shadow);
            margin-bottom: 2rem;
        }

        a {
            color: var(--accent-color);
            text-decoration: none;
            transition: opacity 0.2s;
        }

        a:hover {
            text-decoration: underline;
        }

        button {
            background-color: var(--accent-color);
            color: #fff;
            border: none;
            padding: 0.8rem 1.5rem;
            border-radius: var(--border-radius);
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.1s, opacity 0.2s;
        }

        button:active {
            transform: scale(0.98);
        }

        .text-muted {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        code { 
            background-color: var(--accent-soft);
            padding: 0.2rem 0.4rem;
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-size: 0.9em;
        }

        header {
            color: var(--text-main);
            background-color: color-mix(in srgb, var(--border-color), transparent 50%);
            padding-top: 1px;
            padding: 0rem 3%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1000;
            width: 100%;
        }