/* roulang page: index */
:root {
            --bg-deep: #070B19;
            --bg-card: rgba(16, 26, 54, 0.65);
            --neon-cyan: #00F0FF;
            --neon-purple: #7B2CBF;
            --neon-amber: #FFB703;
            --border-glow: rgba(0, 240, 255, 0.15);
            --border-hover: rgba(0, 240, 255, 0.4);
            --text-main: #E2E8F0;
            --text-muted: #94A3B8;
        }

        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }

        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .glass-card:hover {
            border-color: var(--border-hover);
            box-shadow: 0 10px 30px -10px rgba(0, 240, 255, 0.2);
        }

        .btn-glow-primary {
            background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-purple) 100%);
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.35);
            transition: all 0.25s ease-in-out;
        }

        .btn-glow-primary:hover {
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.65);
            transform: translateY(-2px);
        }

        .text-gradient {
            background: linear-gradient(135deg, #FFFFFF 20%, var(--neon-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .text-gradient-purple {
            background: linear-gradient(135deg, var(--neon-cyan) 0%, #A855F7 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .code-container {
            background: rgba(5, 8, 18, 0.85);
            border: 1px solid rgba(0, 240, 255, 0.2);
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }