/* roulang page: index */
:root {
            --primary: hsl(215, 65%, 28%);
            --accent: hsl(38, 92%, 50%);
            --bg-light: hsl(210, 20%, 98%);
            --bg-dark: hsl(220, 30%, 12%);
            --text-main: hsl(215, 25%, 15%);
            --text-muted: hsl(215, 15%, 45%);
            --border-color: rgba(15, 23, 42, 0.08);
            --shadow-subtle: 0 4px 6px -1px rgba(0, 0, 0, 0.04), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
            --shadow-hover: 0 16px 28px -4px rgba(25, 66, 119, 0.12);
        }
        body {
            font-family: var(--font-sans);
            color: var(--text-main);
            background-color: var(--bg-light);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        .header-glass {
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }
        .card-custom {
            background: #ffffff;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-subtle);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(25, 66, 119, 0.25);
        }
        .hero-pattern {
            background-image: radial-gradient(rgba(25, 66, 119, 0.08) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .btn-glow {
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .btn-glow:hover {
            box-shadow: 0 0 20px rgba(245, 158, 11, 0.45);
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out, opacity 0.3s ease;
            opacity: 0;
        }
        .accordion-content.active {
            max-height: 500px;
            opacity: 1;
        }