/* roulang page: index */
:root {
            --bg-main: #FFFFFF;
            --bg-alt: #F8FAFC;
            --text-title: #0F172A;
            --text-body: #334155;
            --border-color: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }
        body {
            background-color: var(--bg-main);
            color: var(--text-body);
            overflow-x: hidden;
        }
        .code-font {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
        }
        .pulse-dot {
            animation: pulse-ring 2s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
        }
        @keyframes pulse-ring {
            0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
            70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
            100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
        }
        .tech-border-glow:hover {
            border-color: #2563EB;
            box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.12);
        }